[PATCH v6 00/12] Introduce Nuvoton ma35d1 SoC

[PATCH v6 00/12] Introduce Nuvoton ma35d1 SoC

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

This patchset adds initial support for the Nuvoton ma35d1 SoC, including
initial device tree, clock driver, reset driver, and serial driver.

This patchset cover letter is based from the initial support for Nuvoton
ma35d1 to keep tracking the version history.

This patchset had been applied to Linux kernel 6.3-rc3 and tested on the
Nuvoton ma35d1 SOM evaluation board.

(ma35d1 information: https://www.nuvoton.com/products/microprocessors/arm-cortex-a35-mpus/)
MA35D1 porting on linux-5.10.y can be found at: https://github.com/OpenNuvoton/MPU-Family

v6:
  - Combine nuvoton,ma35d1-clk.yaml and nuvoton,ma35d1-clk.h into one patch
  - Combine nuvoton,ma35d1-reset.yaml and nuvoton,ma35d1-reset.h into one patch
  - rename Documentation/devicetree/bindings/arm/npcm directory as nuvoton
  - Remove patch for adding include/linux/mfd/ma35d1-sys.h as it's not required
  - Update dtsi & dts files and move board-specific nodes to dts
  - Modify reset driver
  - Modify serial driver, fix coding style issues
  - Modify clock driver, rewrite the PLL calculation functions

v5:
  - Add ARCH_NUVOTON to arm64 Kconfig
  - Add ARCH_NUVOTON to defconfig
  - Add the clock driver
  - Add the reset driver
  - Add the serial driver
  - Add us to the maintainer

v4:
  - patch 4/5 is a resend
  - Fixed dt_binding_check errors of nuvoton,ma35d1-clk.yaml
  - Modify ma35d1.dtsi
    1. Add a node hxt_24m
    2. Fixed the base address of gic node
    3. Add clocks and clock-names to clock node
  - Fixed borad binding mistakes of nuvoton.yaml

v3:
  - added patch 4/5 and 5/5
  - introduce CONFIG_ARCH_NUVOTON option
  - add initial bindings for Nuvoton Platform boards
  - fixed coding style problem of nuvoton,ma35d1-clk.h
  - added CAPLL to clock-controller node
  - modify the chosen node of ma35d1-evb.dts
  - modify clock yaml "clk-pll-mode" to "nuvoton,clk-pll-mode"

v2:
  - fixed dt_binding_check failed of nuvoton,ma35d1-clk.yaml

Jacky Huang (12):
  arm64: Kconfig.platforms: Add config for Nuvoton MA35 platform
  arm64: defconfig: Add support for Nuvoton MA35 family SoCs
  dt-bindings: clock: nuvoton: add binding for ma35d1 clock controller
  dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control
  dt-bindings: mfd: syscon: Add nuvoton,ma35d1-sys compatible
  dt-bindings: arm: Add initial bindings for Nuvoton platform
  dt-bindings: serial: Document ma35d1 uart controller
  arm64: dts: nuvoton: Add initial ma35d1 device tree
  clk: nuvoton: Add clock driver for ma35d1 clock controller
  reset: Add Nuvoton ma35d1 reset driver support
  tty: serial: Add Nuvoton ma35d1 serial driver support
  MAINTAINERS: Add entry for NUVOTON MA35

 .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  |  30 +
 .../nuvoton,npcm-gcr.yaml}                    |   2 +-
 .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |   2 +-
 .../bindings/clock/nuvoton,ma35d1-clk.yaml    |  72 ++
 .../devicetree/bindings/mfd/syscon.yaml       |   1 +
 .../bindings/reset/nuvoton,ma35d1-reset.yaml  |  44 +
 .../serial/nuvoton,ma35d1-serial.yaml         |  48 +
 MAINTAINERS                                   |   9 +
 arch/arm64/Kconfig.platforms                  |   9 +
 arch/arm64/boot/dts/nuvoton/Makefile          |   2 +
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      |  56 +
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  56 +
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       | 231 +++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/clk/Makefile                          |   1 +
 drivers/clk/nuvoton/Kconfig                   |  19 +
 drivers/clk/nuvoton/Makefile                  |   4 +
 drivers/clk/nuvoton/clk-ma35d1-divider.c      | 140 +++
 drivers/clk/nuvoton/clk-ma35d1-pll.c          | 350 +++++++
 drivers/clk/nuvoton/clk-ma35d1.c              | 963 ++++++++++++++++++
 drivers/clk/nuvoton/clk-ma35d1.h              | 123 +++
 drivers/reset/Kconfig                         |   6 +
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-ma35d1.c                  | 152 +++
 drivers/tty/serial/Kconfig                    |  18 +
 drivers/tty/serial/Makefile                   |   1 +
 drivers/tty/serial/ma35d1_serial.c            | 802 +++++++++++++++
 .../dt-bindings/clock/nuvoton,ma35d1-clk.h    | 253 +++++
 .../dt-bindings/reset/nuvoton,ma35d1-reset.h  | 108 ++
 29 files changed, 3502 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
 rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
 rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)
 create mode 100644 Documentation/devicetree/bindings/clock/nuvoton,ma35d1-clk.yaml
 create mode 100644 Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
 create mode 100644 Documentation/devicetree/bindings/serial/nuvoton,ma35d1-serial.yaml
 create mode 100644 arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
 create mode 100644 arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
 create mode 100644 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
 create mode 100644 drivers/clk/nuvoton/Kconfig
 create mode 100644 drivers/clk/nuvoton/Makefile
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1-divider.c
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1-pll.c
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1.c
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1.h
 create mode 100644 drivers/reset/reset-ma35d1.c
 create mode 100644 drivers/tty/serial/ma35d1_serial.c
 create mode 100644 include/dt-bindings/clock/nuvoton,ma35d1-clk.h
 create mode 100644 include/dt-bindings/reset/nuvoton,ma35d1-reset.h

-- 
2.34.1

[PATCH v6 01/12] arm64: Kconfig.platforms: Add config for Nuvoton MA35 platform

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add ARCH_NUVOTON configuration option for Nuvoton MA35 family SoCs.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 arch/arm64/Kconfig.platforms | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 89a0b13b058d..c1f277c05569 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -236,6 +236,15 @@ config ARCH_NPCM
 	  General support for NPCM8xx BMC (Arbel).
 	  Nuvoton NPCM8xx BMC based on the Cortex A35.
 
+config ARCH_NUVOTON
+	bool "Nuvoton MA35 Platforms"
+	select GPIOLIB
+	select PINCTRL
+	select RESET_CONTROLLER
+	help
+	  This enables support for the ARMv8 based Nuvoton SoCs such
+	  as MA35D1.
+
 config ARCH_QCOM
 	bool "Qualcomm Platforms"
 	select GPIOLIB
-- 
2.34.1

[PATCH v6 02/12] arm64: defconfig: Add support for Nuvoton MA35 family SoCs

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

This adds support for the Nuvoton MA35 family SoCs which
are based on the Cortex-A35 Armv8-A 64-bit architecture.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 7790ee42c68a..c96189acb02c 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -53,6 +53,7 @@ CONFIG_ARCH_LAYERSCAPE=y
 CONFIG_ARCH_MXC=y
 CONFIG_ARCH_S32=y
 CONFIG_ARCH_NPCM=y
+CONFIG_ARCH_NUVOTON=y
 CONFIG_ARCH_QCOM=y
 CONFIG_ARCH_RENESAS=y
 CONFIG_ARCH_ROCKCHIP=y
-- 
2.34.1

[PATCH v6 03/12] dt-bindings: clock: nuvoton: add binding for ma35d1 clock controller

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add the dt-bindings header for Nuvoton ma35d1, that gets shared
between the clock controller and clock references in the dts.
Add documentation to describe nuvoton ma35d1 clock driver.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 .../bindings/clock/nuvoton,ma35d1-clk.yaml    |  72 +++++
 .../dt-bindings/clock/nuvoton,ma35d1-clk.h    | 253 ++++++++++++++++++
 2 files changed, 325 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/nuvoton,ma35d1-clk.yaml
 create mode 100644 include/dt-bindings/clock/nuvoton,ma35d1-clk.h

diff --git a/Documentation/devicetree/bindings/clock/nuvoton,ma35d1-clk.yaml b/Documentation/devicetree/bindings/clock/nuvoton,ma35d1-clk.yaml
new file mode 100644
index 000000000000..0a9c2a115e6b
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/nuvoton,ma35d1-clk.yaml
@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/nuvoton,ma35d1-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 Clock Controller Module
+
+maintainers:
+  - Chi-Fang Li <cfli0@nuvoton.com>
+  - Jacky Huang <ychuang3@nuvoton.com>
+
+description: |
+  The MA35D1 clock controller generates clocks for the whole chip,
+  including system clocks and all peripheral clocks.
+
+  See also:
+    include/dt-bindings/clock/ma35d1-clk.h
+
+properties:
+  compatible:
+    items:
+      - const: nuvoton,ma35d1-clk
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+  clocks:
+    maxItems: 1
+
+  nuvoton,pll-mode:
+    description:
+      A list of PLL operation mode corresponding to CAPLL, DDRPLL, APLL,
+      EPLL, and VPLL in sequential.
+    maxItems: 5
+    items:
+      enum:
+        - integer
+        - fractional
+        - spread-spectrum
+    $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+
+  nuvoton,sys:
+    description:
+      Use to unlock and lock some clock controller registers. The lock
+      control register is in system controller.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - clocks
+  - nuvoton,sys
+
+additionalProperties: false
+
+examples:
+  - |
+
+    clock-controller@40460200 {
+        compatible = "nuvoton,ma35d1-clk", "syscon";
+        reg = <0x40460200 0x100>;
+        #clock-cells = <1>;
+        clocks = <&clk_hxt>;
+        nuvoton,sys = <&sys>;
+    };
+...
diff --git a/include/dt-bindings/clock/nuvoton,ma35d1-clk.h b/include/dt-bindings/clock/nuvoton,ma35d1-clk.h
new file mode 100644
index 000000000000..ba2d70f776a6
--- /dev/null
+++ b/include/dt-bindings/clock/nuvoton,ma35d1-clk.h
@@ -0,0 +1,253 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
+/*
+ * Copyright (C) 2023 Nuvoton Technologies.
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_NUVOTON_MA35D1_CLK_H
+#define __DT_BINDINGS_CLOCK_NUVOTON_MA35D1_CLK_H
+
+/* external and internal oscillator clocks */
+#define HXT		0
+#define HXT_GATE	1
+#define LXT		2
+#define LXT_GATE	3
+#define HIRC		4
+#define HIRC_GATE	5
+#define LIRC		6
+#define LIRC_GATE	7
+/* PLLs */
+#define CAPLL		8
+#define SYSPLL		9
+#define DDRPLL		10
+#define APLL		11
+#define EPLL		12
+#define VPLL		13
+/* EPLL divider */
+#define EPLL_DIV2	14
+#define EPLL_DIV4	15
+#define EPLL_DIV8	16
+/* CPU clock, system clock, AXI, HCLK and PCLK */
+#define CA35CLK_MUX	17
+#define AXICLK_DIV2	18
+#define AXICLK_DIV4	19
+#define AXICLK_MUX	20
+#define SYSCLK0_MUX	21
+#define SYSCLK1_MUX	22
+#define SYSCLK1_DIV2	23
+#define HCLK0		24
+#define HCLK1		25
+#define HCLK2		26
+#define PCLK0		27
+#define PCLK1		28
+#define PCLK2		29
+#define HCLK3		30
+#define PCLK3		31
+#define PCLK4		32
+/* AXI and AHB peripheral clocks */
+#define USBPHY0		33
+#define USBPHY1		34
+#define DDR0_GATE	35
+#define DDR6_GATE	36
+#define CAN0_MUX	37
+#define CAN0_DIV	38
+#define CAN0_GATE	39
+#define CAN1_MUX	40
+#define CAN1_DIV	41
+#define CAN1_GATE	42
+#define CAN2_MUX	43
+#define CAN2_DIV	44
+#define CAN2_GATE	45
+#define CAN3_MUX	46
+#define CAN3_DIV	47
+#define CAN3_GATE	48
+#define SDH0_MUX	49
+#define SDH0_GATE	50
+#define SDH1_MUX	51
+#define SDH1_GATE	52
+#define NAND_GATE	53
+#define USBD_GATE	54
+#define USBH_GATE	55
+#define HUSBH0_GATE	56
+#define HUSBH1_GATE	57
+#define GFX_MUX		58
+#define GFX_GATE	59
+#define VC8K_GATE	60
+#define DCU_MUX		61
+#define DCU_GATE	62
+#define DCUP_DIV	63
+#define EMAC0_GATE	64
+#define EMAC1_GATE	65
+#define CCAP0_MUX	66
+#define CCAP0_DIV	67
+#define CCAP0_GATE	68
+#define CCAP1_MUX	69
+#define CCAP1_DIV	70
+#define CCAP1_GATE	71
+#define PDMA0_GATE	72
+#define PDMA1_GATE	73
+#define PDMA2_GATE	74
+#define PDMA3_GATE	75
+#define WH0_GATE	76
+#define WH1_GATE	77
+#define HWS_GATE	78
+#define EBI_GATE	79
+#define SRAM0_GATE	80
+#define SRAM1_GATE	81
+#define ROM_GATE	82
+#define TRA_GATE	83
+#define DBG_MUX		84
+#define DBG_GATE	85
+#define CKO_MUX		86
+#define CKO_DIV		87
+#define CKO_GATE	88
+#define GTMR_GATE	89
+#define GPA_GATE	90
+#define GPB_GATE	91
+#define GPC_GATE	92
+#define GPD_GATE	93
+#define GPE_GATE	94
+#define GPF_GATE	95
+#define GPG_GATE	96
+#define GPH_GATE	97
+#define GPI_GATE	98
+#define GPJ_GATE	99
+#define GPK_GATE	100
+#define GPL_GATE	101
+#define GPM_GATE	102
+#define GPN_GATE	103
+/* APB peripheral clocks */
+#define TMR0_MUX	104
+#define TMR0_GATE	105
+#define TMR1_MUX	106
+#define TMR1_GATE	107
+#define TMR2_MUX	108
+#define TMR2_GATE	109
+#define TMR3_MUX	110
+#define TMR3_GATE	111
+#define TMR4_MUX	112
+#define TMR4_GATE	113
+#define TMR5_MUX	114
+#define TMR5_GATE	115
+#define TMR6_MUX	116
+#define TMR6_GATE	117
+#define TMR7_MUX	118
+#define TMR7_GATE	119
+#define TMR8_MUX	120
+#define TMR8_GATE	121
+#define TMR9_MUX	122
+#define TMR9_GATE	123
+#define TMR10_MUX	124
+#define TMR10_GATE	125
+#define TMR11_MUX	126
+#define TMR11_GATE	127
+#define UART0_MUX	128
+#define UART0_DIV	129
+#define UART0_GATE	130
+#define UART1_MUX	131
+#define UART1_DIV	132
+#define UART1_GATE	133
+#define UART2_MUX	134
+#define UART2_DIV	135
+#define UART2_GATE	136
+#define UART3_MUX	137
+#define UART3_DIV	138
+#define UART3_GATE	139
+#define UART4_MUX	140
+#define UART4_DIV	141
+#define UART4_GATE	142
+#define UART5_MUX	143
+#define UART5_DIV	144
+#define UART5_GATE	145
+#define UART6_MUX	146
+#define UART6_DIV	147
+#define UART6_GATE	148
+#define UART7_MUX	149
+#define UART7_DIV	150
+#define UART7_GATE	151
+#define UART8_MUX	152
+#define UART8_DIV	153
+#define UART8_GATE	154
+#define UART9_MUX	155
+#define UART9_DIV	156
+#define UART9_GATE	157
+#define UART10_MUX	158
+#define UART10_DIV	159
+#define UART10_GATE	160
+#define UART11_MUX	161
+#define UART11_DIV	162
+#define UART11_GATE	163
+#define UART12_MUX	164
+#define UART12_DIV	165
+#define UART12_GATE	166
+#define UART13_MUX	167
+#define UART13_DIV	168
+#define UART13_GATE	169
+#define UART14_MUX	170
+#define UART14_DIV	171
+#define UART14_GATE	172
+#define UART15_MUX	173
+#define UART15_DIV	174
+#define UART15_GATE	175
+#define UART16_MUX	176
+#define UART16_DIV	177
+#define UART16_GATE	178
+#define RTC_GATE	179
+#define DDR_GATE	180
+#define KPI_MUX		181
+#define KPI_DIV		182
+#define KPI_GATE	183
+#define I2C0_GATE	184
+#define I2C1_GATE	185
+#define I2C2_GATE	186
+#define I2C3_GATE	187
+#define I2C4_GATE	188
+#define I2C5_GATE	189
+#define QSPI0_MUX	190
+#define QSPI0_GATE	191
+#define QSPI1_MUX	192
+#define QSPI1_GATE	193
+#define SMC0_MUX	194
+#define SMC0_DIV	195
+#define SMC0_GATE	196
+#define SMC1_MUX	197
+#define SMC1_DIV	198
+#define SMC1_GATE	199
+#define WDT0_MUX	200
+#define WDT0_GATE	201
+#define WDT1_MUX	202
+#define WDT1_GATE	203
+#define WDT2_MUX	204
+#define WDT2_GATE	205
+#define WWDT0_MUX	206
+#define WWDT1_MUX	207
+#define WWDT2_MUX	208
+#define EPWM0_GATE	209
+#define EPWM1_GATE	210
+#define EPWM2_GATE	211
+#define I2S0_MUX	212
+#define I2S0_GATE	213
+#define I2S1_MUX	214
+#define I2S1_GATE	215
+#define SSMCC_GATE	216
+#define SSPCC_GATE	217
+#define SPI0_MUX	218
+#define SPI0_GATE	219
+#define SPI1_MUX	220
+#define SPI1_GATE	221
+#define SPI2_MUX	222
+#define SPI2_GATE	223
+#define SPI3_MUX	224
+#define SPI3_GATE	225
+#define ECAP0_GATE	226
+#define ECAP1_GATE	227
+#define ECAP2_GATE	228
+#define QEI0_GATE	229
+#define QEI1_GATE	230
+#define QEI2_GATE	231
+#define ADC_DIV		232
+#define ADC_GATE	233
+#define EADC_DIV	234
+#define EADC_GATE	235
+#define	CLK_MAX_IDX	236
+
+#endif /* __DT_BINDINGS_CLOCK_NUVOTON_MA35D1_CLK_H */
-- 
2.34.1

[PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add the dt-bindings header for Nuvoton ma35d1, that gets shared
between the reset controller and reset references in the dts.
Add documentation to describe nuvoton ma35d1 reset driver.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 .../bindings/reset/nuvoton,ma35d1-reset.yaml  |  44 +++++++
 .../dt-bindings/reset/nuvoton,ma35d1-reset.h  | 108 ++++++++++++++++++
 2 files changed, 152 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
 create mode 100644 include/dt-bindings/reset/nuvoton,ma35d1-reset.h

diff --git a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
new file mode 100644
index 000000000000..342717257e5c
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/nuvoton,ma35d1-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 Reset Controller
+
+maintainers:
+  - Chi-Fang Li <cfli0@nuvoton.com>
+  - Jacky Huang <ychuang3@nuvoton.com>
+
+description:
+  The system reset controller can be used to reset various peripheral
+  controllers in MA35D1 SoC.
+
+properties:
+  compatible:
+    const: nuvoton,ma35d1-reset
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  # system reset controller node:
+  - |
+
+    system-management@40460000 {
+        compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
+        reg = <0x40460000 0x200>;
+
+        reset-controller {
+            compatible = "nuvoton,ma35d1-reset";
+            #reset-cells = <1>;
+        };
+    };
+...
+
diff --git a/include/dt-bindings/reset/nuvoton,ma35d1-reset.h b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
new file mode 100644
index 000000000000..f3088bc0afec
--- /dev/null
+++ b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) */
+/*
+ * Copyright (C) 2023 Nuvoton Technologies.
+ * Author: Chi-Fen Li <cfli0@nuvoton.com>
+ *
+ * Device Tree binding constants for MA35D1 reset controller.
+ */
+
+#ifndef __DT_BINDINGS_RESET_MA35D1_H
+#define __DT_BINDINGS_RESET_MA35D1_H
+
+#define MA35D1_RESET_CHIP	0
+#define MA35D1_RESET_CA35CR0	1
+#define MA35D1_RESET_CA35CR1	2
+#define MA35D1_RESET_CM4	3
+#define MA35D1_RESET_PDMA0	4
+#define MA35D1_RESET_PDMA1	5
+#define MA35D1_RESET_PDMA2	6
+#define MA35D1_RESET_PDMA3	7
+#define MA35D1_RESET_DISP	9
+#define MA35D1_RESET_VCAP0	10
+#define MA35D1_RESET_VCAP1	11
+#define MA35D1_RESET_GFX	12
+#define MA35D1_RESET_VDEC	13
+#define MA35D1_RESET_WHC0	14
+#define MA35D1_RESET_WHC1	15
+#define MA35D1_RESET_GMAC0	16
+#define MA35D1_RESET_GMAC1	17
+#define MA35D1_RESET_HWSEM	18
+#define MA35D1_RESET_EBI	19
+#define MA35D1_RESET_HSUSBH0	20
+#define MA35D1_RESET_HSUSBH1	21
+#define MA35D1_RESET_HSUSBD	22
+#define MA35D1_RESET_USBHL	23
+#define MA35D1_RESET_SDH0	24
+#define MA35D1_RESET_SDH1	25
+#define MA35D1_RESET_NAND	26
+#define MA35D1_RESET_GPIO	27
+#define MA35D1_RESET_MCTLP	28
+#define MA35D1_RESET_MCTLC	29
+#define MA35D1_RESET_DDRPUB	30
+#define MA35D1_RESET_TMR0	34
+#define MA35D1_RESET_TMR1	35
+#define MA35D1_RESET_TMR2	36
+#define MA35D1_RESET_TMR3	37
+#define MA35D1_RESET_I2C0	40
+#define MA35D1_RESET_I2C1	41
+#define MA35D1_RESET_I2C2	42
+#define MA35D1_RESET_I2C3	43
+#define MA35D1_RESET_QSPI0	44
+#define MA35D1_RESET_SPI0	45
+#define MA35D1_RESET_SPI1	46
+#define MA35D1_RESET_SPI2	47
+#define MA35D1_RESET_UART0	48
+#define MA35D1_RESET_UART1	49
+#define MA35D1_RESET_UART2	50
+#define MA35D1_RESET_UAER3	51
+#define MA35D1_RESET_UART4	52
+#define MA35D1_RESET_UART5	53
+#define MA35D1_RESET_UART6	54
+#define MA35D1_RESET_UART7	55
+#define MA35D1_RESET_CANFD0	56
+#define MA35D1_RESET_CANFD1	57
+#define MA35D1_RESET_EADC0	60
+#define MA35D1_RESET_I2S0	61
+#define MA35D1_RESET_SC0	64
+#define MA35D1_RESET_SC1	65
+#define MA35D1_RESET_QSPI1	68
+#define MA35D1_RESET_SPI3	70
+#define MA35D1_RESET_EPWM0	80
+#define MA35D1_RESET_EPWM1	81
+#define MA35D1_RESET_QEI0	86
+#define MA35D1_RESET_QEI1	87
+#define MA35D1_RESET_ECAP0	90
+#define MA35D1_RESET_ECAP1	91
+#define MA35D1_RESET_CANFD2	92
+#define MA35D1_RESET_ADC0	95
+#define MA35D1_RESET_TMR4	96
+#define MA35D1_RESET_TMR5	97
+#define MA35D1_RESET_TMR6	98
+#define MA35D1_RESET_TMR7	99
+#define MA35D1_RESET_TMR8	100
+#define MA35D1_RESET_TMR9	101
+#define MA35D1_RESET_TMR10	102
+#define MA35D1_RESET_TMR11	103
+#define MA35D1_RESET_UART8	104
+#define MA35D1_RESET_UART9	105
+#define MA35D1_RESET_UART10	106
+#define MA35D1_RESET_UART11	107
+#define MA35D1_RESET_UART12	108
+#define MA35D1_RESET_UART13	109
+#define MA35D1_RESET_UART14	110
+#define MA35D1_RESET_UART15	111
+#define MA35D1_RESET_UART16	112
+#define MA35D1_RESET_I2S1	113
+#define MA35D1_RESET_I2C4	114
+#define MA35D1_RESET_I2C5	115
+#define MA35D1_RESET_EPWM2	116
+#define MA35D1_RESET_ECAP2	117
+#define MA35D1_RESET_QEI2	118
+#define MA35D1_RESET_CANFD3	119
+#define MA35D1_RESET_KPI	120
+#define MA35D1_RESET_GIC	124
+#define MA35D1_RESET_SSMCC	126
+#define MA35D1_RESET_SSPCC	127
+#define MA35D1_RESET_COUNT	128
+
+#endif
-- 
2.34.1

[PATCH v6 05/12] dt-bindings: mfd: syscon: Add nuvoton,ma35d1-sys compatible

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add Nuvoton ma35d1 system registers compatible.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 Documentation/devicetree/bindings/mfd/syscon.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/mfd/syscon.yaml b/Documentation/devicetree/bindings/mfd/syscon.yaml
index c828c4f5e4a7..7ee1d27f59dd 100644
--- a/Documentation/devicetree/bindings/mfd/syscon.yaml
+++ b/Documentation/devicetree/bindings/mfd/syscon.yaml
@@ -56,6 +56,7 @@ properties:
               - microchip,lan966x-cpu-syscon
               - microchip,sparx5-cpu-syscon
               - mstar,msc313-pmsleep
+              - nuvoton,ma35d1-sys
               - nuvoton,wpcm450-shm
               - rockchip,px30-qos
               - rockchip,rk3036-qos
-- 
2.34.1

[PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Rename the bindings/arm/npcm directory as nuvoton.
Add binding for ARMv8 based Nuvotn SoCs and platform boards.
Add initial bindings for ma35d1 series development boards.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
 .../nuvoton,npcm-gcr.yaml}                    |  2 +-
 .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
 3 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
 rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
 rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)

diff --git a/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
new file mode 100644
index 000000000000..fb190db61525
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/nuvoton/nuvoton,ma35d1.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35 series SoC based platforms
+
+maintainers:
+  - Jacky Huang <ychuang3@nuvoton.com>
+
+description: |
+  Boards with an ARMv8 based Nuvoton MA35 series SoC shall have
+  the following properties.
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+
+      - description: MA35D1 based boards
+        items:
+          - enum:
+              - nuvoton,ma35d1-iot
+              - nuvoton,ma35d1-som
+          - const: nuvoton,ma35d1
+
+additionalProperties: true
+...
diff --git a/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm-gcr.yaml
similarity index 93%
rename from Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml
rename to Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm-gcr.yaml
index 94e72f25b331..1f354aa900ea 100644
--- a/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml
+++ b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm-gcr.yaml
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/arm/npcm/nuvoton,gcr.yaml#
+$id: http://devicetree.org/schemas/arm/nuvoton/nuvoton,npcm-gcr.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: Global Control Registers block in Nuvoton SoCs
diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.yaml b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm.yaml
similarity index 93%
rename from Documentation/devicetree/bindings/arm/npcm/npcm.yaml
rename to Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm.yaml
index 6871483947c5..d386744c8815 100644
--- a/Documentation/devicetree/bindings/arm/npcm/npcm.yaml
+++ b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm.yaml
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/arm/npcm/npcm.yaml#
+$id: http://devicetree.org/schemas/arm/nuvoton/nuvoton,npcm.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: NPCM Platforms
-- 
2.34.1

[PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add documentation to describe nuvoton ma35d1 uart driver bindings.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 .../serial/nuvoton,ma35d1-serial.yaml         | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serial/nuvoton,ma35d1-serial.yaml

diff --git a/Documentation/devicetree/bindings/serial/nuvoton,ma35d1-serial.yaml b/Documentation/devicetree/bindings/serial/nuvoton,ma35d1-serial.yaml
new file mode 100644
index 000000000000..a76af0f6009b
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/nuvoton,ma35d1-serial.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/nuvoton,ma35d1-serial.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 Universal Asynchronous Receiver/Transmitter (UART)
+
+maintainers:
+  - Min-Jen Chen <mjchen@nuvoton.com>
+  - Jacky Huang <ychuang3@nuvoton.com>
+
+allOf:
+  - $ref: serial.yaml
+
+properties:
+  compatible:
+    const: nuvoton,ma35d1-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+
+    serial@40700000 {
+        compatible = "nuvoton,ma35d1-uart";
+        reg = <0x40700000 0x100>;
+        interrupts = <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clk UART0_GATE>;
+    };
+...
-- 
2.34.1

[PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add initial device tree support for Nuvoton ma35d1 SoC, including
cpu, clock, reset, and serial controllers.
Add reference boards som-256m and iot-512m.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 arch/arm64/boot/dts/nuvoton/Makefile          |   2 +
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      |  56 +++++
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  56 +++++
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       | 231 ++++++++++++++++++
 4 files changed, 345 insertions(+)
 create mode 100644 arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
 create mode 100644 arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
 create mode 100644 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi

diff --git a/arch/arm64/boot/dts/nuvoton/Makefile b/arch/arm64/boot/dts/nuvoton/Makefile
index a99dab90472a..c11ab4eac9c7 100644
--- a/arch/arm64/boot/dts/nuvoton/Makefile
+++ b/arch/arm64/boot/dts/nuvoton/Makefile
@@ -1,2 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_NPCM) += nuvoton-npcm845-evb.dtb
+dtb-$(CONFIG_ARCH_NUVOTON) += ma35d1-iot-512m.dtb
+dtb-$(CONFIG_ARCH_NUVOTON) += ma35d1-som-256m.dtb
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
new file mode 100644
index 000000000000..b89e2be6abae
--- /dev/null
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Shan-Chun Hung <schung@nuvoton.com>
+ *         Jacky huang <ychuang3@nuvoton.com>
+ */
+
+/dts-v1/;
+#include "ma35d1.dtsi"
+
+/ {
+	model = "Nuvoton MA35D1-IoT";
+	compatible = "nuvoton,ma35d1-iot", "nuvoton,ma35d1";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	mem: memory@80000000 {
+		device_type = "memory";
+		reg = <0x00000000 0x80000000 0 0x20000000>; /* 512M DRAM */
+	};
+
+	clk_hxt: clock-hxt {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+		clock-output-names = "clk_hxt";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&clk {
+	assigned-clocks = <&clk CAPLL>,
+			  <&clk DDRPLL>,
+			  <&clk APLL>,
+			  <&clk EPLL>,
+			  <&clk VPLL>;
+	assigned-clock-rates = <800000000>,
+			       <266000000>,
+			       <180000000>,
+			       <500000000>,
+			       <102000000>;
+	nuvoton,pll-mode = "integer",
+			   "fractional",
+			   "integer",
+			   "integer",
+			   "integer";
+};
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
new file mode 100644
index 000000000000..a1ebddecb7f8
--- /dev/null
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Shan-Chun Hung <schung@nuvoton.com>
+ *         Jacky huang <ychuang3@nuvoton.com>
+ */
+
+/dts-v1/;
+#include "ma35d1.dtsi"
+
+/ {
+	model = "Nuvoton MA35D1-SOM";
+	compatible = "nuvoton,ma35d1-som", "nuvoton,ma35d1";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	mem: memory@80000000 {
+		device_type = "memory";
+		reg = <0x00000000 0x80000000 0 0x10000000>; /* 256M DRAM */
+	};
+
+	clk_hxt: clock-hxt {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+		clock-output-names = "clk_hxt";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&clk {
+	assigned-clocks = <&clk CAPLL>,
+			  <&clk DDRPLL>,
+			  <&clk APLL>,
+			  <&clk EPLL>,
+			  <&clk VPLL>;
+	assigned-clock-rates = <800000000>,
+			       <266000000>,
+			       <180000000>,
+			       <500000000>,
+			       <102000000>;
+	nuvoton,pll-mode = "integer",
+			   "fractional",
+			   "integer",
+			   "integer",
+			   "integer";
+};
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
new file mode 100644
index 000000000000..0740b0b218a7
--- /dev/null
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
@@ -0,0 +1,231 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Shan-Chun Hung <schung@nuvoton.com>
+ *         Jacky huang <ychuang3@nuvoton.com>
+ */
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+#include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+
+/ {
+	compatible = "nuvoton,ma35d1";
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cpus {
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a35";
+			reg = <0x0 0x0>;
+			enable-method = "psci";
+			next-level-cache = <&L2_0>;
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a35";
+			reg = <0x0 0x1>;
+			enable-method = "psci";
+			next-level-cache = <&L2_0>;
+		};
+
+		L2_0: l2-cache0 {
+			compatible = "cache";
+			cache-level = <2>;
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) |
+			      IRQ_TYPE_LEVEL_LOW)>, /* Physical Secure */
+			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) |
+			      IRQ_TYPE_LEVEL_LOW)>, /* Physical Non-Secure */
+			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) |
+			      IRQ_TYPE_LEVEL_LOW)>, /* Virtual */
+			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) |
+			      IRQ_TYPE_LEVEL_LOW)>; /* Hypervisor */
+		clock-frequency = <12000000>;
+		interrupt-parent = <&gic>;
+	};
+
+	sys: system-management@40460000 {
+		compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
+		reg = <0x0 0x40460000 0x0 0x200>;
+
+		reset: reset-controller {
+			compatible = "nuvoton,ma35d1-reset";
+			#reset-cells = <1>;
+		};
+	};
+
+	clk: clock-controller@40460200 {
+		compatible = "nuvoton,ma35d1-clk", "syscon";
+		reg = <0x00000000 0x40460200 0x0 0x100>;
+		#clock-cells = <1>;
+		clocks = <&clk_hxt>;
+		nuvoton,sys = <&sys>;
+	};
+
+	gic: interrupt-controller@50801000 {
+		compatible = "arm,gic-400";
+		reg =   <0x0 0x50801000 0 0x1000>, /* GICD */
+			<0x0 0x50802000 0 0x2000>, /* GICC */
+			<0x0 0x50804000 0 0x2000>, /* GICH */
+			<0x0 0x50806000 0 0x2000>; /* GICV */
+		#interrupt-cells = <3>;
+		interrupt-parent = <&gic>;
+		interrupt-controller;
+		interrupts = <GIC_PPI 9 (GIC_CPU_MASK_RAW(0x13) |
+			      IRQ_TYPE_LEVEL_HIGH)>;
+	};
+
+	uart0:serial@40700000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40700000 0x0 0x100>;
+		interrupts = <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART0_GATE>;
+		status = "disabled";
+	};
+
+	uart1:serial@40710000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40710000 0x0 0x100>;
+		interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART1_GATE>;
+		status = "disabled";
+	};
+
+	uart2:serial@40720000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40720000 0x0 0x100>;
+		interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART2_GATE>;
+		status = "disabled";
+	};
+
+	uart3:serial@40730000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40730000 0x0 0x100>;
+		interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART3_GATE>;
+		status = "disabled";
+	};
+
+	uart4:serial@40740000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40740000 0x0 0x100>;
+		interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART4_GATE>;
+		status = "disabled";
+	};
+
+	uart5:serial@40750000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40750000 0x0 0x100>;
+		interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART5_GATE>;
+		status = "disabled";
+	};
+
+	uart6:serial@40760000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40760000 0x0 0x100>;
+		interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART6_GATE>;
+		status = "disabled";
+	};
+
+	uart7:serial@40770000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40770000 0x0 0x100>;
+		interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART7_GATE>;
+		status = "disabled";
+	};
+
+	uart8:serial@40780000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40780000 0x0 0x100>;
+		interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART8_GATE>;
+		status = "disabled";
+	};
+
+	uart9:serial@40790000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40790000 0x0 0x100>;
+		interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART9_GATE>;
+		status = "disabled";
+	};
+
+	uart10:serial@407a0000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x407a0000 0x0 0x100>;
+		interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART10_GATE>;
+		status = "disabled";
+	};
+
+	uart11:serial@407b0000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x407b0000 0x0 0x100>;
+		interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART11_GATE>;
+		status = "disabled";
+	};
+
+	uart12:serial@407c0000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x407c0000 0x0 0x100>;
+		interrupts = <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART12_GATE>;
+		status = "disabled";
+	};
+
+	uart13:serial@407d0000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x407d0000 0x0 0x100>;
+		interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART13_GATE>;
+		status = "disabled";
+	};
+
+	uart14:serial@407e0000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x407e0000 0x0 0x100>;
+		interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART14_GATE>;
+		status = "disabled";
+	};
+
+	uart15:serial@407f0000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x407f0000 0x0 0x100>;
+		interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART15_GATE>;
+		status = "disabled";
+	};
+
+	uart16:serial@40880000 {
+		compatible = "nuvoton,ma35d1-uart";
+		reg = <0x0 0x40880000 0x0 0x100>;
+		interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk UART16_GATE>;
+		status = "disabled";
+	};
+};
-- 
2.34.1

[PATCH v6 09/12] clk: nuvoton: Add clock driver for ma35d1 clock controller

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

The clock controller generates clocks for the whole chip, including
system clocks and all peripheral clocks. This driver support ma35d1
clock gating, divider, and individual PLL configuration.

There are 6 PLLs in ma35d1 SoC:
  - CA-PLL for the two Cortex-A35 CPU clock
  - SYS-PLL for system bus, which comes from the companion MCU
    and cannot be programmed by clock controller.
  - DDR-PLL for DDR
  - EPLL for GMAC and GFX, Display, and VDEC IPs.
  - VPLL for video output pixel clock
  - APLL for SDHC, I2S audio, and other IPs.
CA-PLL has only one operation mode.
DDR-PLL, EPLL, VPLL, and APLL are advanced PLLs which have 3
operation modes: integer mode, fraction mode, and spread specturm mode.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 drivers/clk/Makefile                     |   1 +
 drivers/clk/nuvoton/Kconfig              |  19 +
 drivers/clk/nuvoton/Makefile             |   4 +
 drivers/clk/nuvoton/clk-ma35d1-divider.c | 140 ++++
 drivers/clk/nuvoton/clk-ma35d1-pll.c     | 350 ++++++++
 drivers/clk/nuvoton/clk-ma35d1.c         | 963 +++++++++++++++++++++++
 drivers/clk/nuvoton/clk-ma35d1.h         | 123 +++
 7 files changed, 1600 insertions(+)
 create mode 100644 drivers/clk/nuvoton/Kconfig
 create mode 100644 drivers/clk/nuvoton/Makefile
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1-divider.c
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1-pll.c
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1.c
 create mode 100644 drivers/clk/nuvoton/clk-ma35d1.h

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index e3ca0d058a25..2e7916d269e1 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -103,6 +103,7 @@ endif
 obj-y					+= mstar/
 obj-y					+= mvebu/
 obj-$(CONFIG_ARCH_MXS)			+= mxs/
+obj-$(CONFIG_ARCH_NUVOTON)		+= nuvoton/
 obj-$(CONFIG_COMMON_CLK_NXP)		+= nxp/
 obj-$(CONFIG_COMMON_CLK_PISTACHIO)	+= pistachio/
 obj-$(CONFIG_COMMON_CLK_PXA)		+= pxa/
diff --git a/drivers/clk/nuvoton/Kconfig b/drivers/clk/nuvoton/Kconfig
new file mode 100644
index 000000000000..c1324efedcb9
--- /dev/null
+++ b/drivers/clk/nuvoton/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+# common clock support for Nuvoton SoC family.
+
+config COMMON_CLK_NUVOTON
+	bool "Nuvoton clock controller common support"
+	depends on ARCH_NUVOTON
+	default ARCH_NUVOTON
+	help
+	  Say y here to enable common clock controller for Nuvoton platforms.
+
+if COMMON_CLK_NUVOTON
+config CLK_MA35D1
+	bool "Nuvoton MA35D1 clock controller support"
+	depends on ARM64 || COMPILE_TEST
+	default y
+	help
+	  Build the driver for MA35D1 Clock Driver.
+
+endif
diff --git a/drivers/clk/nuvoton/Makefile b/drivers/clk/nuvoton/Makefile
new file mode 100644
index 000000000000..d2c092541b8d
--- /dev/null
+++ b/drivers/clk/nuvoton/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_ARCH_NUVOTON) += clk-ma35d1.o
+obj-$(CONFIG_ARCH_NUVOTON) += clk-ma35d1-divider.o
+obj-$(CONFIG_ARCH_NUVOTON) += clk-ma35d1-pll.o
diff --git a/drivers/clk/nuvoton/clk-ma35d1-divider.c b/drivers/clk/nuvoton/clk-ma35d1-divider.c
new file mode 100644
index 000000000000..340a889a1417
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1-divider.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Chi-Fang Li <cfli0@nuvoton.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/regmap.h>
+#include <linux/spinlock.h>
+
+#include "clk-ma35d1.h"
+
+#define clk_div_mask(width)	((1 << (width)) - 1)
+
+struct ma35d1_adc_clk_div {
+	struct clk_hw hw;
+	void __iomem *reg;
+	u8 shift;
+	u8 width;
+	u32 mask;
+	const struct clk_div_table *table;
+	/* protects concurrent access to clock divider registers */
+	spinlock_t *lock;
+};
+
+static inline struct ma35d1_adc_clk_div *to_ma35d1_adc_clk_div(struct clk_hw *_hw)
+{
+	return container_of(_hw, struct ma35d1_adc_clk_div, hw);
+}
+
+static inline unsigned long ma35d1_clkdiv_recalc_rate(struct clk_hw *hw,
+						      unsigned long parent_rate)
+{
+	unsigned int val;
+	struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
+
+	val = readl_relaxed(dclk->reg) >> dclk->shift;
+	val &= clk_div_mask(dclk->width);
+	val += 1;
+	return divider_recalc_rate(hw, parent_rate, val, dclk->table,
+				   CLK_DIVIDER_ROUND_CLOSEST, dclk->width);
+}
+
+static inline long ma35d1_clkdiv_round_rate(struct clk_hw *hw,
+					    unsigned long rate,
+					    unsigned long *prate)
+{
+	struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
+
+	return divider_round_rate(hw, rate, prate, dclk->table,
+				  dclk->width, CLK_DIVIDER_ROUND_CLOSEST);
+}
+
+static inline int ma35d1_clkdiv_set_rate(struct clk_hw *hw,
+					 unsigned long rate,
+					 unsigned long parent_rate)
+{
+	int value;
+	unsigned long flags = 0;
+	u32 data;
+	struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
+
+	value = divider_get_val(rate, parent_rate, dclk->table,
+				dclk->width, CLK_DIVIDER_ROUND_CLOSEST);
+
+	if (dclk->lock)
+		spin_lock_irqsave(dclk->lock, flags);
+
+	data = readl_relaxed(dclk->reg);
+	data &= ~(clk_div_mask(dclk->width) << dclk->shift);
+	data |= (value - 1) << dclk->shift;
+	data |= dclk->mask;
+
+	writel_relaxed(data, dclk->reg);
+
+	if (dclk->lock)
+		spin_unlock_irqrestore(dclk->lock, flags);
+
+	return 0;
+}
+
+static const struct clk_ops ma35d1_adc_clkdiv_ops = {
+	.recalc_rate = ma35d1_clkdiv_recalc_rate,
+	.round_rate = ma35d1_clkdiv_round_rate,
+	.set_rate = ma35d1_clkdiv_set_rate,
+};
+
+struct clk_hw *ma35d1_reg_adc_clkdiv(struct device *dev, const char *name,
+				     const char *parent_name,
+				     spinlock_t *lock,
+				     unsigned long flags, void __iomem *reg,
+				     u8 shift, u8 width, u32 mask_bit)
+{
+	struct ma35d1_adc_clk_div *div;
+	struct clk_init_data init;
+	struct clk_div_table *table;
+	u32 max_div, min_div;
+	struct clk_hw *hw;
+	int ret;
+	int i;
+
+	div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
+	if (!div)
+		return ERR_PTR(-ENOMEM);
+
+	max_div = clk_div_mask(width) + 1;
+	min_div = 1;
+
+	table = devm_kcalloc(dev, max_div + 1, sizeof(*table), GFP_KERNEL);
+	if (!table)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < max_div; i++) {
+		table[i].val = (min_div + i);
+		table[i].div = 2 * table[i].val;
+	}
+	table[max_div].val = 0;
+	table[max_div].div = 0;
+
+	init.name = name;
+	init.ops = &ma35d1_adc_clkdiv_ops;
+	init.flags |= flags;
+	init.parent_names = parent_name ? &parent_name : NULL;
+	init.num_parents = parent_name ? 1 : 0;
+
+	div->reg = reg;
+	div->shift = shift;
+	div->width = width;
+	div->mask = mask_bit ? BIT(mask_bit) : 0;
+	div->lock = lock;
+	div->hw.init = &init;
+	div->table = table;
+
+	hw = &div->hw;
+	ret = devm_clk_hw_register(dev, hw);
+	if (ret < 0)
+		return ERR_PTR(ret);
+	return hw;
+}
diff --git a/drivers/clk/nuvoton/clk-ma35d1-pll.c b/drivers/clk/nuvoton/clk-ma35d1-pll.c
new file mode 100644
index 000000000000..b36fbda4fa0a
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1-pll.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Chi-Fang Li <cfli0@nuvoton.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "clk-ma35d1.h"
+
+#define REG_SYS_RLKTZNS		0x1a4 /* Register Lock Control */
+
+struct ma35d1_clk_pll {
+	struct clk_hw hw;
+	u8 type;
+	u8 mode;
+	unsigned long rate;
+	void __iomem *ctl0_base;
+	void __iomem *ctl1_base;
+	void __iomem *ctl2_base;
+	struct regmap *regmap;
+};
+
+static inline struct ma35d1_clk_pll *to_ma35d1_clk_pll(struct clk_hw *_hw)
+{
+	return container_of(_hw, struct ma35d1_clk_pll, hw);
+}
+
+static void ma35d1_unlock_regs(struct ma35d1_clk_pll *pll)
+{
+	int ret;
+
+	do {
+		regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x59);
+		regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x16);
+		regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x88);
+		regmap_read(pll->regmap, REG_SYS_RLKTZNS, &ret);
+	} while (ret == 0);
+}
+
+static void ma35d1_lock_regs(struct ma35d1_clk_pll *pll)
+{
+	regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x0);
+}
+
+static unsigned long ma35d1_calc_smic_pll_freq(u32 pll0_ctl0,
+					       unsigned long parent_rate)
+{
+	u32 m, n, p, outdiv;
+	u64 pll_freq;
+	u32 clk_div_table[] = { 1, 2, 4, 8 };
+
+	if (pll0_ctl0 & SPLL0_CTL0_BP)
+		return parent_rate;
+
+	n = FIELD_GET(SPLL0_CTL0_FBDIV, pll0_ctl0);
+	m = FIELD_GET(SPLL0_CTL0_INDIV, pll0_ctl0);
+	p = FIELD_GET(SPLL0_CTL0_OUTDIV, pll0_ctl0);
+	outdiv = clk_div_table[p];
+	pll_freq = (u64)parent_rate * n;
+	do_div(pll_freq, m * outdiv);
+	return (unsigned long)pll_freq;
+}
+
+static unsigned long ma35d1_calc_pll_freq(u8 mode, u32 *reg_ctl,
+					  unsigned long parent_rate)
+{
+	u32 m, n, p;
+	u64 pll_freq, x;
+
+	if (reg_ctl[1] & PLL_CTL1_BP)
+		return parent_rate;
+
+	if (mode == PLL_MODE_INT) {
+		n = FIELD_GET(PLL_CTL0_FBDIV, reg_ctl[0]);
+		m = FIELD_GET(PLL_CTL0_INDIV, reg_ctl[0]);
+		p = FIELD_GET(PLL_CTL1_OUTDIV, reg_ctl[1]);
+		pll_freq = (u64)parent_rate * n;
+		do_div(pll_freq, m * p);
+	} else {
+		n = FIELD_GET(PLL_CTL0_FBDIV, reg_ctl[0]);
+		m = FIELD_GET(PLL_CTL0_INDIV, reg_ctl[0]);
+		p = FIELD_GET(PLL_CTL1_OUTDIV, reg_ctl[1]);
+		x = FIELD_GET(PLL_CTL1_FRAC, reg_ctl[1]);
+		/* 2 decimal places floating to integer (ex. 1.23 to 123) */
+		n = n * 100 + ((x * 100) / FIELD_MAX(PLL_CTL1_FRAC));
+		pll_freq = ((u64)parent_rate * n) / 100 / m / p;
+	}
+	return (unsigned long)pll_freq;
+}
+
+static int ma35d1_pll_find_closest(struct ma35d1_clk_pll *pll,
+				   unsigned long rate,
+				   unsigned long parent_rate,
+				   u32 *reg_ctl, unsigned long *freq)
+{
+	int p, m, n;
+	int fbdiv_min, fbdiv_max;
+	unsigned long diff = 0xffffffff;
+
+	*freq = 0;
+	if ((rate < PLL_FCLKO_MIN_FREQ) || (rate > PLL_FCLKO_MAX_FREQ))
+		return -EINVAL;
+
+	if (pll->mode == PLL_MODE_INT) {
+		fbdiv_min = FBDIV_MIN;
+		fbdiv_max = FBDIV_MAX;
+	} else {
+		fbdiv_min = FBDIV_FRAC_MIN;
+		fbdiv_max = FBDIV_FRAC_MAX;
+	}
+
+	for (m = INDIV_MIN; m <= INDIV_MAX; m++) {
+		for (n = fbdiv_min; n <= fbdiv_max; n++) {
+			for (p = OUTDIV_MIN; p <= OUTDIV_MAX; p++) {
+				unsigned long tmp, fout;
+				u64 fclk;
+
+				tmp = parent_rate / m;
+				if (tmp < PLL_FREF_M_MIN_FREQ ||
+				    tmp > PLL_FREF_M_MAX_FREQ)
+					continue; /* constrain */
+
+				fclk = (u64)parent_rate * n / m;
+				/* for 2 decimal places */
+				if (pll->mode != PLL_MODE_INT)
+					fclk /= 100;
+
+				if (fclk < PLL_FCLK_MIN_FREQ ||
+				    fclk > PLL_FCLK_MAX_FREQ)
+					continue; /* constrain */
+
+				fout = (unsigned long)(fclk / p);
+				if (fout < PLL_FCLKO_MIN_FREQ ||
+				    fout > PLL_FCLKO_MAX_FREQ)
+					continue; /* constrain */
+
+				if (abs(rate - fout) < diff) {
+					reg_ctl[0] = FIELD_PREP(PLL_CTL0_INDIV, m) |
+						     FIELD_PREP(PLL_CTL0_FBDIV, n);
+					reg_ctl[1] = FIELD_PREP(PLL_CTL1_OUTDIV, p);
+					*freq = fout;
+					diff = abs(rate - fout);
+					if (diff == 0)
+						break;
+				}
+			}
+		}
+	}
+	if (*freq == 0)
+		return -EINVAL; /* cannot find even one valid setting */
+	return 0;
+}
+
+static int ma35d1_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+				   unsigned long parent_rate)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 reg_ctl[3] = { 0 };
+	unsigned long pll_freq;
+	int ret;
+
+	if ((parent_rate < PLL_FREF_MIN_FREQ) ||
+	    (parent_rate > PLL_FREF_MAX_FREQ))
+		return -EINVAL;
+
+	if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {
+		pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
+		return -EACCES;
+	}
+
+	ret = ma35d1_pll_find_closest(pll, rate, parent_rate, reg_ctl, &pll_freq);
+	if (ret != 0)
+		return ret;
+	pll->rate = pll_freq;
+
+	switch (pll->mode) {
+	case PLL_MODE_INT:
+		reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_INT);
+		break;
+	case PLL_MODE_FRAC:
+		reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_FRAC);
+		break;
+	case PLL_MODE_SS:
+		reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_SS) |
+			      FIELD_PREP(PLL_CTL0_SSRATE, PLL_SS_RATE);
+		reg_ctl[2] = FIELD_PREP(PLL_CTL2_SLOPE, PLL_SLOPE);
+		break;
+	}
+	reg_ctl[1] |= PLL_CTL1_PD;
+
+	ma35d1_unlock_regs(pll);
+	writel_relaxed(reg_ctl[0], pll->ctl0_base);
+	writel_relaxed(reg_ctl[1], pll->ctl1_base);
+	writel_relaxed(reg_ctl[2], pll->ctl2_base);
+	ma35d1_lock_regs(pll);
+	return 0;
+}
+
+static unsigned long ma35d1_clk_pll_recalc_rate(struct clk_hw *hw,
+						unsigned long parent_rate)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 reg_ctl[3];
+	unsigned long pll_freq;
+
+	if ((parent_rate < PLL_FREF_MIN_FREQ) || (parent_rate > PLL_FREF_MAX_FREQ))
+		return 0;
+
+	switch (pll->type) {
+	case MA35D1_CAPLL:
+		reg_ctl[0] = readl_relaxed(pll->ctl0_base);
+		pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], parent_rate);
+		break;
+	case MA35D1_DDRPLL:
+	case MA35D1_APLL:
+	case MA35D1_EPLL:
+	case MA35D1_VPLL:
+		reg_ctl[0] = readl_relaxed(pll->ctl0_base);
+		reg_ctl[1] = readl_relaxed(pll->ctl1_base);
+		pll_freq = ma35d1_calc_pll_freq(pll->mode, reg_ctl, parent_rate);
+		break;
+	}
+	return pll_freq;
+}
+
+static long ma35d1_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+				      unsigned long *parent_rate)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 reg_ctl[3] = { 0 };
+	unsigned long pll_freq;
+	long ret;
+
+	if (*parent_rate < PLL_FREF_MIN_FREQ || *parent_rate > PLL_FREF_MAX_FREQ)
+		return -EINVAL;
+
+	ret = ma35d1_pll_find_closest(pll, rate, *parent_rate, reg_ctl, &pll_freq);
+	if (ret != 0)
+		return ret;
+
+	switch (pll->type) {
+	case MA35D1_CAPLL:
+		reg_ctl[0] = readl_relaxed(pll->ctl0_base);
+		pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], *parent_rate);
+		break;
+	case MA35D1_DDRPLL:
+	case MA35D1_APLL:
+	case MA35D1_EPLL:
+	case MA35D1_VPLL:
+		reg_ctl[0] = readl_relaxed(pll->ctl0_base);
+		reg_ctl[1] = readl_relaxed(pll->ctl1_base);
+		pll_freq = ma35d1_calc_pll_freq(pll->mode, reg_ctl, *parent_rate);
+		break;
+	}
+	return pll_freq;
+}
+
+static int ma35d1_clk_pll_is_prepared(struct clk_hw *hw)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 val = readl_relaxed(pll->ctl1_base);
+
+	return val & PLL_CTL1_PD ? 0 : 1;
+}
+
+static int ma35d1_clk_pll_prepare(struct clk_hw *hw)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 val;
+
+	if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {
+		pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
+		return -EACCES;
+	}
+
+	ma35d1_unlock_regs(pll);
+	val = readl_relaxed(pll->ctl1_base);
+	val &= ~PLL_CTL1_PD;
+	writel_relaxed(val, pll->ctl1_base);
+	ma35d1_lock_regs(pll);
+	return 0;
+}
+
+static void ma35d1_clk_pll_unprepare(struct clk_hw *hw)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 val;
+
+	if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {
+		pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
+	} else {
+		val = readl_relaxed(pll->ctl1_base);
+		val |= PLL_CTL1_PD;
+		writel_relaxed(val, pll->ctl1_base);
+	}
+}
+
+static const struct clk_ops ma35d1_clk_pll_ops = {
+	.is_prepared = ma35d1_clk_pll_is_prepared,
+	.prepare = ma35d1_clk_pll_prepare,
+	.unprepare = ma35d1_clk_pll_unprepare,
+	.set_rate = ma35d1_clk_pll_set_rate,
+	.recalc_rate = ma35d1_clk_pll_recalc_rate,
+	.round_rate = ma35d1_clk_pll_round_rate,
+};
+
+struct clk_hw *ma35d1_reg_clk_pll(enum ma35d1_pll_type type,
+				  u8 u8mode, const char *name,
+				  const char *parent,
+				  unsigned long targetFreq,
+				  void __iomem *base,
+				  struct regmap *regmap)
+{
+	struct ma35d1_clk_pll *pll;
+	struct clk_hw *hw;
+	struct clk_init_data init;
+	int ret;
+
+	pll = kmalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return ERR_PTR(-ENOMEM);
+
+	pll->type = type;
+	pll->mode = u8mode;
+	pll->rate = targetFreq;
+	pll->ctl0_base = base + REG_PLL_CTL0_OFFSET;
+	pll->ctl1_base = base + REG_PLL_CTL1_OFFSET;
+	pll->ctl2_base = base + REG_PLL_CTL2_OFFSET;
+	pll->regmap = regmap;
+
+	init.name = name;
+	init.flags = 0;
+	init.parent_names = &parent;
+	init.num_parents = 1;
+	init.ops = &ma35d1_clk_pll_ops;
+	pll->hw.init = &init;
+	hw = &pll->hw;
+
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
+		pr_err("failed to register vsi-pll clock!!!\n");
+		kfree(pll);
+		return ERR_PTR(ret);
+	}
+	return hw;
+}
diff --git a/drivers/clk/nuvoton/clk-ma35d1.c b/drivers/clk/nuvoton/clk-ma35d1.c
new file mode 100644
index 000000000000..e4d3ced396a3
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1.c
@@ -0,0 +1,963 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Chi-Fang Li <cfli0@nuvoton.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+
+#include "clk-ma35d1.h"
+
+static DEFINE_SPINLOCK(ma35d1_lock);
+
+static const char *const ca35clk_sel_clks[] = {
+	"hxt", "capll", "ddrpll", "dummy"
+};
+
+static const char *const sysclk0_sel_clks[] = {
+	"epll_div2", "syspll"
+};
+
+static const char *const sysclk1_sel_clks[] = {
+	"hxt", "syspll"
+};
+
+static const char *const axiclk_sel_clks[] = {
+	"capll_div2", "capll_div4"
+};
+
+static const char *const ccap_sel_clks[] = {
+	"hxt", "vpll", "apll", "syspll"
+};
+
+static const char *const sdh_sel_clks[] = {
+	"syspll", "apll", "dummy", "dummy"
+};
+
+static const char *const dcu_sel_clks[] = {
+	"epll_div2", "syspll"
+};
+
+static const char *const gfx_sel_clks[] = {
+	"epll", "syspll"
+};
+
+static const char *const dbg_sel_clks[] = {
+	"hirc", "syspll"
+};
+
+static const char *const timer0_sel_clks[] = {
+	"hxt", "lxt", "pclk0", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer1_sel_clks[] = {
+	"hxt", "lxt", "pclk0", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer2_sel_clks[] = {
+	"hxt", "lxt", "pclk1", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer3_sel_clks[] = {
+	"hxt", "lxt", "pclk1", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer4_sel_clks[] = {
+	"hxt", "lxt", "pclk2", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer5_sel_clks[] = {
+	"hxt", "lxt", "pclk2", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer6_sel_clks[] = {
+	"hxt", "lxt", "pclk0", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer7_sel_clks[] = {
+	"hxt", "lxt", "pclk0", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer8_sel_clks[] = {
+	"hxt", "lxt", "pclk1", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer9_sel_clks[] = {
+	"hxt", "lxt", "pclk1", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer10_sel_clks[] = {
+	"hxt", "lxt", "pclk2", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const timer11_sel_clks[] = {
+	"hxt", "lxt", "pclk2", "dummy", "dummy", "lirc", "dummy", "hirc"
+};
+
+static const char *const uart_sel_clks[] = {
+	"hxt", "sysclk1_div2", "dummy", "dummy"
+};
+
+static const char *const wdt0_sel_clks[] = {
+	"dummy", "lxt", "pclk3_div4096", "lirc"
+};
+
+static const char *const wdt1_sel_clks[] = {
+	"dummy", "lxt", "pclk3_div4096", "lirc"
+};
+
+static const char *const wdt2_sel_clks[] = {
+	"dummy", "lxt", "pclk4_div4096", "lirc"
+};
+
+static const char *const wwdt0_sel_clks[] = {
+	"dummy", "dummy", "pclk3_div4096", "lirc"
+};
+
+static const char *const wwdt1_sel_clks[] = {
+	"dummy", "dummy", "pclk3_div4096", "lirc"
+};
+
+static const char *const wwdt2_sel_clks[] = {
+	"dummy", "dummy", "pclk4_div4096", "lirc"
+};
+
+static const char *const spi0_sel_clks[] = {
+	"pclk1", "apll", "dummy", "dummy"
+};
+
+static const char *const spi1_sel_clks[] = {
+	"pclk2", "apll", "dummy", "dummy"
+};
+
+static const char *const spi2_sel_clks[] = {
+	"pclk1", "apll", "dummy", "dummy"
+};
+
+static const char *const spi3_sel_clks[] = {
+	"pclk2", "apll", "dummy", "dummy"
+};
+
+static const char *const qspi0_sel_clks[] = {
+	"pclk0", "apll", "dummy", "dummy"
+};
+
+static const char *const qspi1_sel_clks[] = {
+	"pclk0", "apll", "dummy", "dummy"
+};
+
+static const char *const i2s0_sel_clks[] = {
+	"apll", "sysclk1_div2", "dummy", "dummy"
+};
+
+static const char *const i2s1_sel_clks[] = {
+	"apll", "sysclk1_div2", "dummy", "dummy"
+};
+
+static const char *const can_sel_clks[] = {
+	"apll", "vpll"
+};
+
+static const char *const cko_sel_clks[] = {
+	"hxt", "lxt", "hirc", "lirc", "capll_div4", "syspll",
+	"ddrpll", "epll_div2", "apll", "vpll", "dummy", "dummy",
+	"dummy", "dummy", "dummy", "dummy"
+};
+
+static const char *const smc_sel_clks[] = {
+	"hxt", "pclk4"
+};
+
+static const char *const kpi_sel_clks[] = {
+	"hxt", "lxt"
+};
+
+static const struct clk_div_table ip_div_table[] = {
+	{0, 2}, {1, 4}, {2, 6}, {3, 8}, {4, 10},
+	{5, 12}, {6, 14}, {7, 16}, {0, 0},
+};
+
+static const struct clk_div_table eadc_div_table[] = {
+	{0, 2}, {1, 4}, {2, 6}, {3, 8}, {4, 10},
+	{5, 12}, {6, 14}, {7, 16}, {8, 18},
+	{9, 20}, {10, 22}, {11, 24}, {12, 26},
+	{13, 28}, {14, 30}, {15, 32}, {0, 0},
+};
+
+static inline struct clk_hw *ma35d1_clk_fixed(const char *name, int rate)
+{
+	return clk_hw_register_fixed_rate(NULL, name, NULL, 0, rate);
+}
+
+static inline struct clk_hw *ma35d1_clk_mux(const char *name,
+					    void __iomem *reg,
+					    u8 shift, u8 width,
+					    const char *const *parents,
+					    int num_parents)
+{
+	return clk_hw_register_mux(NULL, name, parents, num_parents,
+				   CLK_SET_RATE_NO_REPARENT, reg, shift,
+				   width, 0, &ma35d1_lock);
+}
+
+static inline struct clk_hw *ma35d1_clk_divider(const char *name,
+						const char *parent,
+						void __iomem *reg, u8 shift,
+						u8 width)
+{
+	return clk_hw_register_divider(NULL, name, parent, CLK_SET_RATE_PARENT,
+				       reg, shift, width, 0, &ma35d1_lock);
+}
+
+static inline struct clk_hw *ma35d1_clk_divider_pow2(const char *name,
+						     const char *parent,
+						     void __iomem *reg,
+						     u8 shift, u8 width)
+{
+	return clk_hw_register_divider(NULL, name, parent,
+				       CLK_DIVIDER_POWER_OF_TWO, reg, shift,
+				       width, 0, &ma35d1_lock);
+}
+
+static inline struct clk_hw *ma35d1_clk_divider_table(const char *name,
+					const char *parent,
+					void __iomem *reg,
+					u8 shift, u8 width,
+					const struct clk_div_table *table)
+{
+	return clk_hw_register_divider_table(NULL, name, parent, 0,
+					     reg, shift, width, 0, table,
+					     &ma35d1_lock);
+}
+
+static inline struct clk_hw *ma35d1_clk_fixed_factor(const char *name,
+						     const char *parent,
+						     unsigned int mult,
+						     unsigned int div)
+{
+	return clk_hw_register_fixed_factor(NULL, name, parent,
+					    CLK_SET_RATE_PARENT, mult, div);
+}
+
+static inline struct clk_hw *ma35d1_clk_gate(const char *name,
+					     const char *parent,
+					     void __iomem *reg, u8 shift)
+{
+	return clk_hw_register_gate(NULL, name, parent, CLK_SET_RATE_PARENT,
+				    reg, shift, 0, &ma35d1_lock);
+}
+
+static int ma35d1_get_pll_setting(struct device_node *clk_node,
+				  u32 *pllmode, u32 *pllfreq)
+{
+	const char *of_str;
+	int i;
+
+	for (i = 0; i < PLL_MAX_NUM; i++) {
+		if (of_property_read_string_index(clk_node, "nuvoton,pll-mode", i, &of_str))
+			return -EINVAL;
+		if (!strcmp(of_str, "integer"))
+			pllmode[i] = PLL_MODE_INT;
+		else if (!strcmp(of_str, "fractional"))
+			pllmode[i] = PLL_MODE_FRAC;
+		else if (!strcmp(of_str, "spread-spectrum"))
+			pllmode[i] = PLL_MODE_SS;
+		else
+			return -EINVAL;
+	}
+	return of_property_read_u32_array(clk_node, "assigned-clock-rates",
+					  pllfreq, PLL_MAX_NUM);
+}
+
+static int ma35d1_clocks_probe(struct platform_device *pdev)
+{
+	struct device_node *clk_node = pdev->dev.of_node;
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	void __iomem *clk_base;
+	struct regmap *regmap;
+	static struct clk_hw **hws;
+	static struct clk_hw_onecell_data *ma35d1_hw_data;
+	u32 pllmode[PLL_MAX_NUM];
+	u32 pllfreq[PLL_MAX_NUM];
+	int ret;
+
+	ma35d1_hw_data = devm_kzalloc(&pdev->dev, struct_size(ma35d1_hw_data,
+				      hws, CLK_MAX_IDX), GFP_KERNEL);
+	if (WARN_ON(!ma35d1_hw_data))
+		return -ENOMEM;
+
+	ma35d1_hw_data->num = CLK_MAX_IDX;
+	hws = ma35d1_hw_data->hws;
+
+	clk_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(clk_base))
+		return PTR_ERR(clk_base);
+
+	regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "nuvoton,sys");
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	ret = ma35d1_get_pll_setting(clk_node, pllmode, pllfreq);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Invalid PLL setting!\n");
+		return -EINVAL;
+	}
+
+	hws[HXT] = ma35d1_clk_fixed("hxt", 24000000);
+	hws[HXT_GATE] = ma35d1_clk_gate("hxt_gate", "hxt",
+					clk_base + REG_CLK_PWRCTL, 0);
+	hws[LXT] = ma35d1_clk_fixed("lxt", 32768);
+	hws[LXT_GATE] = ma35d1_clk_gate("lxt_gate", "lxt",
+					clk_base + REG_CLK_PWRCTL, 1);
+	hws[HIRC] = ma35d1_clk_fixed("hirc", 12000000);
+	hws[HIRC_GATE] = ma35d1_clk_gate("hirc_gate", "hirc",
+					 clk_base + REG_CLK_PWRCTL, 2);
+	hws[LIRC] = ma35d1_clk_fixed("lirc", 32000);
+	hws[LIRC_GATE] = ma35d1_clk_gate("lirc_gate", "lirc",
+					 clk_base + REG_CLK_PWRCTL, 3);
+
+	hws[CAPLL] = ma35d1_reg_clk_pll(MA35D1_CAPLL, pllmode[0], "capll",
+					"hxt", pllfreq[0],
+					clk_base + REG_CLK_PLL0CTL0, regmap);
+	hws[SYSPLL] = ma35d1_clk_fixed("syspll", 180000000);
+
+	hws[DDRPLL] = ma35d1_reg_clk_pll(MA35D1_DDRPLL, pllmode[1],
+					 "ddrpll", "hxt", pllfreq[1],
+					 clk_base + REG_CLK_PLL2CTL0, regmap);
+	hws[APLL] = ma35d1_reg_clk_pll(MA35D1_APLL, pllmode[2], "apll", "hxt",
+				       pllfreq[2], clk_base + REG_CLK_PLL3CTL0, regmap);
+	hws[EPLL] = ma35d1_reg_clk_pll(MA35D1_EPLL, pllmode[3], "epll", "hxt",
+				       pllfreq[3], clk_base + REG_CLK_PLL4CTL0, regmap);
+	hws[VPLL] = ma35d1_reg_clk_pll(MA35D1_VPLL, pllmode[4], "vpll", "hxt",
+				       pllfreq[4], clk_base + REG_CLK_PLL5CTL0, regmap);
+	hws[EPLL_DIV2] = ma35d1_clk_fixed_factor("epll_div2", "epll", 1, 2);
+	hws[EPLL_DIV4] = ma35d1_clk_fixed_factor("epll_div4", "epll", 1, 4);
+	hws[EPLL_DIV8] = ma35d1_clk_fixed_factor("epll_div8", "epll", 1, 8);
+
+	hws[CA35CLK_MUX] = ma35d1_clk_mux("ca35clk_mux", clk_base + REG_CLK_CLKSEL0, 0, 2,
+					  ca35clk_sel_clks, ARRAY_SIZE(ca35clk_sel_clks));
+	hws[AXICLK_DIV2] = ma35d1_clk_fixed_factor("capll_div2", "ca35clk_mux", 1, 2);
+	hws[AXICLK_DIV4] = ma35d1_clk_fixed_factor("capll_div4", "ca35clk_mux", 1, 4);
+	hws[AXICLK_MUX] = ma35d1_clk_mux("axiclk_mux", clk_base + REG_CLK_CLKDIV0, 26, 1,
+					 axiclk_sel_clks, ARRAY_SIZE(axiclk_sel_clks));
+
+	hws[SYSCLK0_MUX] = ma35d1_clk_mux("sysclk0_mux", clk_base + REG_CLK_CLKSEL0, 2, 1,
+					  sysclk0_sel_clks, ARRAY_SIZE(sysclk0_sel_clks));
+	hws[SYSCLK1_MUX] = ma35d1_clk_mux("sysclk1_mux", clk_base + REG_CLK_CLKSEL0, 4, 1,
+					  sysclk1_sel_clks, ARRAY_SIZE(sysclk1_sel_clks));
+	hws[SYSCLK1_DIV2] = ma35d1_clk_fixed_factor("sysclk1_div2", "sysclk1_mux", 1, 2);
+
+	/* HCLK0~3 & PCLK0~4 */
+	hws[HCLK0] = ma35d1_clk_fixed_factor("hclk0", "sysclk1_mux", 1, 1);
+	hws[HCLK1] = ma35d1_clk_fixed_factor("hclk1", "sysclk1_mux", 1, 1);
+	hws[HCLK2] = ma35d1_clk_fixed_factor("hclk2", "sysclk1_mux", 1, 1);
+	hws[PCLK0] = ma35d1_clk_fixed_factor("pclk0", "sysclk1_mux", 1, 1);
+	hws[PCLK1] = ma35d1_clk_fixed_factor("pclk1", "sysclk1_mux", 1, 1);
+	hws[PCLK2] = ma35d1_clk_fixed_factor("pclk2", "sysclk1_mux", 1, 1);
+
+	hws[HCLK3] = ma35d1_clk_fixed_factor("hclk3", "sysclk1_mux", 1, 2);
+	hws[PCLK3] = ma35d1_clk_fixed_factor("pclk3", "sysclk1_mux", 1, 2);
+	hws[PCLK4] = ma35d1_clk_fixed_factor("pclk4", "sysclk1_mux", 1, 2);
+
+	hws[USBPHY0] = ma35d1_clk_fixed("usbphy0", 480000000);
+	hws[USBPHY1] = ma35d1_clk_fixed("usbphy1", 480000000);
+
+	/* DDR */
+	hws[DDR0_GATE] = ma35d1_clk_gate("ddr0_gate", "ddrpll",
+					 clk_base + REG_CLK_SYSCLK0, 4);
+	hws[DDR6_GATE] = ma35d1_clk_gate("ddr6_gate", "ddrpll",
+					 clk_base + REG_CLK_SYSCLK0, 5);
+
+	hws[CAN0_MUX] = ma35d1_clk_mux("can0_mux", clk_base + REG_CLK_CLKSEL4,
+				       16, 1,
+				       can_sel_clks, ARRAY_SIZE(can_sel_clks));
+	hws[CAN0_DIV] = ma35d1_clk_divider_table("can0_div", "can0_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 0, 3, ip_div_table);
+	hws[CAN0_GATE] = ma35d1_clk_gate("can0_gate", "can0_div",
+					 clk_base + REG_CLK_SYSCLK0, 8);
+	hws[CAN1_MUX] = ma35d1_clk_mux("can1_mux", clk_base + REG_CLK_CLKSEL4,
+				       17, 1, can_sel_clks,
+				       ARRAY_SIZE(can_sel_clks));
+	hws[CAN1_DIV] = ma35d1_clk_divider_table("can1_div", "can1_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 4, 3, ip_div_table);
+	hws[CAN1_GATE] = ma35d1_clk_gate("can1_gate", "can1_div",
+					 clk_base + REG_CLK_SYSCLK0, 9);
+	hws[CAN2_MUX] = ma35d1_clk_mux("can2_mux", clk_base + REG_CLK_CLKSEL4,
+				       18, 1, can_sel_clks,
+				       ARRAY_SIZE(can_sel_clks));
+	hws[CAN2_DIV] = ma35d1_clk_divider_table("can2_div", "can2_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 8, 3, ip_div_table);
+	hws[CAN2_GATE] = ma35d1_clk_gate("can2_gate", "can2_div",
+					 clk_base + REG_CLK_SYSCLK0, 10);
+	hws[CAN3_MUX] = ma35d1_clk_mux("can3_mux", clk_base + REG_CLK_CLKSEL4,
+				       19, 1, can_sel_clks,
+				       ARRAY_SIZE(can_sel_clks));
+	hws[CAN3_DIV] = ma35d1_clk_divider_table("can3_div", "can3_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 12, 3, ip_div_table);
+	hws[CAN3_GATE] = ma35d1_clk_gate("can3_gate", "can3_div",
+					 clk_base + REG_CLK_SYSCLK0, 11);
+
+	hws[SDH0_MUX] = ma35d1_clk_mux("sdh0_mux", clk_base + REG_CLK_CLKSEL0,
+				       16, 2, sdh_sel_clks,
+				       ARRAY_SIZE(sdh_sel_clks));
+	hws[SDH0_GATE] = ma35d1_clk_gate("sdh0_gate", "sdh0_mux",
+					 clk_base + REG_CLK_SYSCLK0, 16);
+	hws[SDH1_MUX] = ma35d1_clk_mux("sdh1_mux", clk_base + REG_CLK_CLKSEL0,
+				       18, 2, sdh_sel_clks,
+				       ARRAY_SIZE(sdh_sel_clks));
+	hws[SDH1_GATE] = ma35d1_clk_gate("sdh1_gate", "sdh1_mux",
+					 clk_base + REG_CLK_SYSCLK0, 17);
+
+	hws[NAND_GATE] = ma35d1_clk_gate("nand_gate", "hclk1",
+					 clk_base + REG_CLK_SYSCLK0, 18);
+
+	hws[USBD_GATE] = ma35d1_clk_gate("usbd_gate", "usbphy0",
+					 clk_base + REG_CLK_SYSCLK0, 19);
+	hws[USBH_GATE] = ma35d1_clk_gate("usbh_gate", "usbphy0",
+					 clk_base + REG_CLK_SYSCLK0, 20);
+	hws[HUSBH0_GATE] = ma35d1_clk_gate("husbh0_gate", "usbphy0",
+					   clk_base + REG_CLK_SYSCLK0, 21);
+	hws[HUSBH1_GATE] = ma35d1_clk_gate("husbh1_gate", "usbphy0",
+					   clk_base + REG_CLK_SYSCLK0, 22);
+
+	hws[GFX_MUX] = ma35d1_clk_mux("gfx_mux", clk_base + REG_CLK_CLKSEL0,
+				      26, 1, gfx_sel_clks,
+				      ARRAY_SIZE(gfx_sel_clks));
+	hws[GFX_GATE] = ma35d1_clk_gate("gfx_gate", "gfx_mux",
+					clk_base + REG_CLK_SYSCLK0, 24);
+	hws[VC8K_GATE] = ma35d1_clk_gate("vc8k_gate", "sysclk0_mux",
+					 clk_base + REG_CLK_SYSCLK0, 25);
+	hws[DCU_MUX] = ma35d1_clk_mux("dcu_mux", clk_base + REG_CLK_CLKSEL0,
+				      24, 1, dcu_sel_clks,
+				      ARRAY_SIZE(dcu_sel_clks));
+	hws[DCU_GATE] = ma35d1_clk_gate("dcu_gate", "dcu_mux",
+					clk_base + REG_CLK_SYSCLK0, 26);
+	hws[DCUP_DIV] = ma35d1_clk_divider_table("dcup_div", "vpll",
+						 clk_base + REG_CLK_CLKDIV0,
+						 16, 3, ip_div_table);
+
+	hws[EMAC0_GATE] = ma35d1_clk_gate("emac0_gate", "epll_div2",
+					  clk_base + REG_CLK_SYSCLK0, 27);
+	hws[EMAC1_GATE] = ma35d1_clk_gate("emac1_gate", "epll_div2",
+					  clk_base + REG_CLK_SYSCLK0, 28);
+
+	hws[CCAP0_MUX] = ma35d1_clk_mux("ccap0_mux",
+					clk_base + REG_CLK_CLKSEL0,
+					12, 1, ccap_sel_clks,
+					ARRAY_SIZE(ccap_sel_clks));
+	hws[CCAP0_DIV] = ma35d1_clk_divider("ccap0_div", "ccap0_mux",
+					    clk_base + REG_CLK_CLKDIV1, 8, 4);
+	hws[CCAP0_GATE] = ma35d1_clk_gate("ccap0_gate", "ccap0_div",
+					  clk_base + REG_CLK_SYSCLK0, 29);
+	hws[CCAP1_MUX] = ma35d1_clk_mux("ccap1_mux",
+					clk_base + REG_CLK_CLKSEL0,
+					14, 1, ccap_sel_clks,
+					ARRAY_SIZE(ccap_sel_clks));
+	hws[CCAP1_DIV] = ma35d1_clk_divider("ccap1_div", "ccap1_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    12, 4);
+	hws[CCAP1_GATE] = ma35d1_clk_gate("ccap1_gate", "ccap1_div",
+					  clk_base + REG_CLK_SYSCLK0, 30);
+
+	hws[PDMA0_GATE] = ma35d1_clk_gate("pdma0_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 0);
+	hws[PDMA1_GATE] = ma35d1_clk_gate("pdma1_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 1);
+	hws[PDMA2_GATE] = ma35d1_clk_gate("pdma2_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 2);
+	hws[PDMA3_GATE] = ma35d1_clk_gate("pdma3_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 3);
+
+	hws[WH0_GATE] = ma35d1_clk_gate("wh0_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 4);
+	hws[WH1_GATE] = ma35d1_clk_gate("wh1_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 5);
+
+	hws[HWS_GATE] = ma35d1_clk_gate("hws_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 6);
+
+	hws[EBI_GATE] = ma35d1_clk_gate("ebi_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 7);
+
+	hws[SRAM0_GATE] = ma35d1_clk_gate("sram0_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 8);
+	hws[SRAM1_GATE] = ma35d1_clk_gate("sram1_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 9);
+
+	hws[ROM_GATE] = ma35d1_clk_gate("rom_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 10);
+
+	hws[TRA_GATE] = ma35d1_clk_gate("tra_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 11);
+
+	hws[DBG_MUX] = ma35d1_clk_mux("dbg_mux", clk_base + REG_CLK_CLKSEL0,
+				      27, 1, dbg_sel_clks,
+				      ARRAY_SIZE(dbg_sel_clks));
+	hws[DBG_GATE] = ma35d1_clk_gate("dbg_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 12);
+
+	hws[CKO_MUX] = ma35d1_clk_mux("cko_mux", clk_base + REG_CLK_CLKSEL4,
+				      24, 4, cko_sel_clks,
+				      ARRAY_SIZE(cko_sel_clks));
+	hws[CKO_DIV] = ma35d1_clk_divider_pow2("cko_div", "cko_mux",
+					       clk_base + REG_CLK_CLKOCTL, 0, 4);
+	hws[CKO_GATE] = ma35d1_clk_gate("cko_gate", "cko_div",
+					clk_base + REG_CLK_SYSCLK1, 13);
+
+	hws[GTMR_GATE] = ma35d1_clk_gate("gtmr_gate", "hirc",
+					 clk_base + REG_CLK_SYSCLK1, 14);
+
+	hws[GPA_GATE] = ma35d1_clk_gate("gpa_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 16);
+	hws[GPB_GATE] = ma35d1_clk_gate("gpb_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 17);
+	hws[GPC_GATE] = ma35d1_clk_gate("gpc_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 18);
+	hws[GPD_GATE] = ma35d1_clk_gate("gpd_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 19);
+	hws[GPE_GATE] = ma35d1_clk_gate("gpe_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 20);
+	hws[GPF_GATE] = ma35d1_clk_gate("gpf_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 21);
+	hws[GPG_GATE] = ma35d1_clk_gate("gpg_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 22);
+	hws[GPH_GATE] = ma35d1_clk_gate("gph_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 23);
+	hws[GPI_GATE] = ma35d1_clk_gate("gpi_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 24);
+	hws[GPJ_GATE] = ma35d1_clk_gate("gpj_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 25);
+	hws[GPK_GATE] = ma35d1_clk_gate("gpk_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 26);
+	hws[GPL_GATE] = ma35d1_clk_gate("gpl_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 27);
+	hws[GPM_GATE] = ma35d1_clk_gate("gpm_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 28);
+	hws[GPN_GATE] = ma35d1_clk_gate("gpn_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 29);
+
+	hws[TMR0_MUX] = ma35d1_clk_mux("tmr0_mux", clk_base + REG_CLK_CLKSEL1,
+				       0, 3, timer0_sel_clks,
+				       ARRAY_SIZE(timer0_sel_clks));
+	hws[TMR0_GATE] = ma35d1_clk_gate("tmr0_gate", "tmr0_mux",
+					 clk_base + REG_CLK_APBCLK0, 0);
+	hws[TMR1_MUX] = ma35d1_clk_mux("tmr1_mux", clk_base + REG_CLK_CLKSEL1,
+				       4, 3, timer1_sel_clks,
+				       ARRAY_SIZE(timer1_sel_clks));
+	hws[TMR1_GATE] = ma35d1_clk_gate("tmr1_gate", "tmr1_mux",
+					 clk_base + REG_CLK_APBCLK0, 1);
+	hws[TMR2_MUX] = ma35d1_clk_mux("tmr2_mux", clk_base + REG_CLK_CLKSEL1,
+				       8, 3, timer2_sel_clks,
+				       ARRAY_SIZE(timer2_sel_clks));
+	hws[TMR2_GATE] = ma35d1_clk_gate("tmr2_gate", "tmr2_mux",
+					 clk_base + REG_CLK_APBCLK0, 2);
+	hws[TMR3_MUX] = ma35d1_clk_mux("tmr3_mux", clk_base + REG_CLK_CLKSEL1,
+				       12, 3, timer3_sel_clks,
+				       ARRAY_SIZE(timer3_sel_clks));
+	hws[TMR3_GATE] = ma35d1_clk_gate("tmr3_gate", "tmr3_mux",
+					 clk_base + REG_CLK_APBCLK0, 3);
+	hws[TMR4_MUX] = ma35d1_clk_mux("tmr4_mux", clk_base + REG_CLK_CLKSEL1,
+				       16, 3, timer4_sel_clks,
+				       ARRAY_SIZE(timer4_sel_clks));
+	hws[TMR4_GATE] = ma35d1_clk_gate("tmr4_gate", "tmr4_mux",
+					 clk_base + REG_CLK_APBCLK0, 4);
+	hws[TMR5_MUX] = ma35d1_clk_mux("tmr5_mux", clk_base + REG_CLK_CLKSEL1,
+				       20, 3, timer5_sel_clks,
+				       ARRAY_SIZE(timer5_sel_clks));
+	hws[TMR5_GATE] = ma35d1_clk_gate("tmr5_gate", "tmr5_mux",
+					 clk_base + REG_CLK_APBCLK0, 5);
+	hws[TMR6_MUX] = ma35d1_clk_mux("tmr6_mux", clk_base + REG_CLK_CLKSEL1,
+				       24, 3, timer6_sel_clks,
+				       ARRAY_SIZE(timer6_sel_clks));
+	hws[TMR6_GATE] = ma35d1_clk_gate("tmr6_gate", "tmr6_mux",
+					 clk_base + REG_CLK_APBCLK0, 6);
+	hws[TMR7_MUX] = ma35d1_clk_mux("tmr7_mux", clk_base + REG_CLK_CLKSEL1,
+				       28, 3, timer7_sel_clks,
+				       ARRAY_SIZE(timer7_sel_clks));
+	hws[TMR7_GATE] = ma35d1_clk_gate("tmr7_gate", "tmr7_mux",
+					 clk_base + REG_CLK_APBCLK0, 7);
+	hws[TMR8_MUX] = ma35d1_clk_mux("tmr8_mux", clk_base + REG_CLK_CLKSEL2,
+				       0, 3, timer8_sel_clks,
+				       ARRAY_SIZE(timer8_sel_clks));
+	hws[TMR8_GATE] = ma35d1_clk_gate("tmr8_gate", "tmr8_mux",
+					 clk_base + REG_CLK_APBCLK0, 8);
+	hws[TMR9_MUX] = ma35d1_clk_mux("tmr9_mux", clk_base + REG_CLK_CLKSEL2,
+				       4, 3, timer9_sel_clks,
+				       ARRAY_SIZE(timer9_sel_clks));
+	hws[TMR9_GATE] = ma35d1_clk_gate("tmr9_gate", "tmr9_mux",
+					 clk_base + REG_CLK_APBCLK0, 9);
+	hws[TMR10_MUX] = ma35d1_clk_mux("tmr10_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					8, 3, timer10_sel_clks,
+					ARRAY_SIZE(timer10_sel_clks));
+	hws[TMR10_GATE] = ma35d1_clk_gate("tmr10_gate", "tmr10_mux",
+					  clk_base + REG_CLK_APBCLK0, 10);
+	hws[TMR11_MUX] = ma35d1_clk_mux("tmr11_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					12, 3, timer11_sel_clks,
+					ARRAY_SIZE(timer11_sel_clks));
+	hws[TMR11_GATE] = ma35d1_clk_gate("tmr11_gate", "tmr11_mux",
+					  clk_base + REG_CLK_APBCLK0, 11);
+
+	hws[UART0_MUX] = ma35d1_clk_mux("uart0_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					16, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART0_DIV] = ma35d1_clk_divider("uart0_div", "uart0_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    16, 4);
+	hws[UART0_GATE] = ma35d1_clk_gate("uart0_gate", "uart0_div",
+					  clk_base + REG_CLK_APBCLK0, 12);
+	hws[UART1_MUX] = ma35d1_clk_mux("uart1_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					18, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART1_DIV] = ma35d1_clk_divider("uart1_div", "uart1_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    20, 4);
+	hws[UART1_GATE] = ma35d1_clk_gate("uart1_gate", "uart1_div",
+					  clk_base + REG_CLK_APBCLK0, 13);
+	hws[UART2_MUX] = ma35d1_clk_mux("uart2_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					20, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART2_DIV] = ma35d1_clk_divider("uart2_div", "uart2_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    24, 4);
+	hws[UART2_GATE] = ma35d1_clk_gate("uart2_gate", "uart2_div",
+					  clk_base + REG_CLK_APBCLK0, 14);
+	hws[UART3_MUX] = ma35d1_clk_mux("uart3_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					22, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART3_DIV] = ma35d1_clk_divider("uart3_div", "uart3_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    28, 4);
+	hws[UART3_GATE] = ma35d1_clk_gate("uart3_gate", "uart3_div",
+					  clk_base + REG_CLK_APBCLK0, 15);
+	hws[UART4_MUX] = ma35d1_clk_mux("uart4_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					24, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART4_DIV] = ma35d1_clk_divider("uart4_div", "uart4_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    0, 4);
+	hws[UART4_GATE] = ma35d1_clk_gate("uart4_gate", "uart4_div",
+					  clk_base + REG_CLK_APBCLK0, 16);
+	hws[UART5_MUX] = ma35d1_clk_mux("uart5_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					26, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART5_DIV] = ma35d1_clk_divider("uart5_div", "uart5_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    4, 4);
+	hws[UART5_GATE] = ma35d1_clk_gate("uart5_gate", "uart5_div",
+					  clk_base + REG_CLK_APBCLK0, 17);
+	hws[UART6_MUX] = ma35d1_clk_mux("uart6_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					28, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART6_DIV] = ma35d1_clk_divider("uart6_div", "uart6_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    8, 4);
+	hws[UART6_GATE] = ma35d1_clk_gate("uart6_gate", "uart6_div",
+					  clk_base + REG_CLK_APBCLK0, 18);
+	hws[UART7_MUX] = ma35d1_clk_mux("uart7_mux",
+					clk_base + REG_CLK_CLKSEL2,
+					30, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART7_DIV] = ma35d1_clk_divider("uart7_div", "uart7_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    12, 4);
+	hws[UART7_GATE] = ma35d1_clk_gate("uart7_gate", "uart7_div",
+					  clk_base + REG_CLK_APBCLK0, 19);
+	hws[UART8_MUX] = ma35d1_clk_mux("uart8_mux",
+					clk_base + REG_CLK_CLKSEL3,
+					0, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART8_DIV] = ma35d1_clk_divider("uart8_div", "uart8_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    16, 4);
+	hws[UART8_GATE] = ma35d1_clk_gate("uart8_gate", "uart8_div",
+					  clk_base + REG_CLK_APBCLK0, 20);
+	hws[UART9_MUX] = ma35d1_clk_mux("uart9_mux",
+					clk_base + REG_CLK_CLKSEL3,
+					2, 2, uart_sel_clks,
+					ARRAY_SIZE(uart_sel_clks));
+	hws[UART9_DIV] = ma35d1_clk_divider("uart9_div", "uart9_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    20, 4);
+	hws[UART9_GATE] = ma35d1_clk_gate("uart9_gate", "uart9_div",
+					  clk_base + REG_CLK_APBCLK0, 21);
+	hws[UART10_MUX] = ma35d1_clk_mux("uart10_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 4, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART10_DIV] = ma35d1_clk_divider("uart10_div", "uart10_mux",
+					     clk_base + REG_CLK_CLKDIV2,
+					     24, 4);
+	hws[UART10_GATE] = ma35d1_clk_gate("uart10_gate", "uart10_div",
+					   clk_base + REG_CLK_APBCLK0, 22);
+	hws[UART11_MUX] = ma35d1_clk_mux("uart11_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 6, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART11_DIV] = ma35d1_clk_divider("uart11_div", "uart11_mux",
+					     clk_base + REG_CLK_CLKDIV2,
+					     28, 4);
+	hws[UART11_GATE] = ma35d1_clk_gate("uart11_gate", "uart11_div",
+					   clk_base + REG_CLK_APBCLK0, 23);
+	hws[UART12_MUX] = ma35d1_clk_mux("uart12_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 8, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART12_DIV] = ma35d1_clk_divider("uart12_div", "uart12_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     0, 4);
+	hws[UART12_GATE] = ma35d1_clk_gate("uart12_gate", "uart12_div",
+					   clk_base + REG_CLK_APBCLK0, 24);
+	hws[UART13_MUX] = ma35d1_clk_mux("uart13_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 10, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART13_DIV] = ma35d1_clk_divider("uart13_div", "uart13_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     4, 4);
+	hws[UART13_GATE] = ma35d1_clk_gate("uart13_gate", "uart13_div",
+					   clk_base + REG_CLK_APBCLK0, 25);
+	hws[UART14_MUX] = ma35d1_clk_mux("uart14_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 12, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART14_DIV] = ma35d1_clk_divider("uart14_div", "uart14_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     8, 4);
+	hws[UART14_GATE] = ma35d1_clk_gate("uart14_gate", "uart14_div",
+					   clk_base + REG_CLK_APBCLK0, 26);
+	hws[UART15_MUX] = ma35d1_clk_mux("uart15_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 14, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART15_DIV] = ma35d1_clk_divider("uart15_div", "uart15_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     12, 4);
+	hws[UART15_GATE] = ma35d1_clk_gate("uart15_gate", "uart15_div",
+					   clk_base + REG_CLK_APBCLK0, 27);
+	hws[UART16_MUX] = ma35d1_clk_mux("uart16_mux",
+					 clk_base + REG_CLK_CLKSEL3,
+					 16, 2, uart_sel_clks,
+					 ARRAY_SIZE(uart_sel_clks));
+	hws[UART16_DIV] = ma35d1_clk_divider("uart16_div", "uart16_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     16, 4);
+	hws[UART16_GATE] = ma35d1_clk_gate("uart16_gate", "uart16_div",
+					   clk_base + REG_CLK_APBCLK0, 28);
+
+	hws[RTC_GATE] = ma35d1_clk_gate("rtc_gate", "lxt",
+					clk_base + REG_CLK_APBCLK0, 29);
+	hws[DDR_GATE] = ma35d1_clk_gate("ddr_gate", "ddrpll",
+					clk_base + REG_CLK_APBCLK0, 30);
+
+	hws[KPI_MUX] = ma35d1_clk_mux("kpi_mux", clk_base + REG_CLK_CLKSEL4,
+				      30, 1, kpi_sel_clks,
+				      ARRAY_SIZE(kpi_sel_clks));
+	hws[KPI_DIV] = ma35d1_clk_divider("kpi_div", "kpi_mux",
+					  clk_base + REG_CLK_CLKDIV4,
+					  24, 8);
+	hws[KPI_GATE] = ma35d1_clk_gate("kpi_gate", "kpi_div",
+					clk_base + REG_CLK_APBCLK0, 31);
+
+	hws[I2C0_GATE] = ma35d1_clk_gate("i2c0_gate", "pclk0",
+					 clk_base + REG_CLK_APBCLK1, 0);
+	hws[I2C1_GATE] = ma35d1_clk_gate("i2c1_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK1, 1);
+	hws[I2C2_GATE] = ma35d1_clk_gate("i2c2_gate", "pclk2",
+					 clk_base + REG_CLK_APBCLK1, 2);
+	hws[I2C3_GATE] = ma35d1_clk_gate("i2c3_gate", "pclk0",
+					 clk_base + REG_CLK_APBCLK1, 3);
+	hws[I2C4_GATE] = ma35d1_clk_gate("i2c4_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK1, 4);
+	hws[I2C5_GATE] = ma35d1_clk_gate("i2c5_gate", "pclk2",
+					 clk_base + REG_CLK_APBCLK1, 5);
+
+	hws[QSPI0_MUX] = ma35d1_clk_mux("qspi0_mux",
+					clk_base + REG_CLK_CLKSEL4,
+					8, 2, qspi0_sel_clks,
+					ARRAY_SIZE(qspi0_sel_clks));
+	hws[QSPI0_GATE] = ma35d1_clk_gate("qspi0_gate", "qspi0_mux",
+					  clk_base + REG_CLK_APBCLK1, 6);
+	hws[QSPI1_MUX] = ma35d1_clk_mux("qspi1_mux",
+					clk_base + REG_CLK_CLKSEL4,
+					10, 2, qspi1_sel_clks,
+					ARRAY_SIZE(qspi1_sel_clks));
+	hws[QSPI1_GATE] = ma35d1_clk_gate("qspi1_gate", "qspi1_mux",
+					  clk_base + REG_CLK_APBCLK1, 7);
+
+	hws[SMC0_MUX] = ma35d1_clk_mux("smc0_mux",
+					clk_base + REG_CLK_CLKSEL4,
+					28, 1, smc_sel_clks,
+					ARRAY_SIZE(smc_sel_clks));
+	hws[SMC0_DIV] = ma35d1_clk_divider("smc0_div", "smc0_mux",
+					   clk_base + REG_CLK_CLKDIV1,
+					   0, 4);
+	hws[SMC0_GATE] = ma35d1_clk_gate("smc0_gate", "smc0_div",
+					 clk_base + REG_CLK_APBCLK1, 12);
+	hws[SMC1_MUX] = ma35d1_clk_mux("smc1_mux",
+					 clk_base + REG_CLK_CLKSEL4,
+					 29, 1, smc_sel_clks,
+					 ARRAY_SIZE(smc_sel_clks));
+	hws[SMC1_DIV] = ma35d1_clk_divider("smc1_div", "smc1_mux",
+					   clk_base + REG_CLK_CLKDIV1,
+					   4, 4);
+	hws[SMC1_GATE] = ma35d1_clk_gate("smc1_gate", "smc1_div",
+					 clk_base + REG_CLK_APBCLK1, 13);
+
+	hws[WDT0_MUX] = ma35d1_clk_mux("wdt0_mux",
+				       clk_base + REG_CLK_CLKSEL3,
+				       20, 2, wdt0_sel_clks,
+				       ARRAY_SIZE(wdt0_sel_clks));
+	hws[WDT0_GATE] = ma35d1_clk_gate("wdt0_gate", "wdt0_mux",
+					 clk_base + REG_CLK_APBCLK1, 16);
+	hws[WDT1_MUX] = ma35d1_clk_mux("wdt1_mux",
+				       clk_base + REG_CLK_CLKSEL3,
+				       24, 2, wdt1_sel_clks,
+				       ARRAY_SIZE(wdt1_sel_clks));
+	hws[WDT1_GATE] = ma35d1_clk_gate("wdt1_gate", "wdt1_mux",
+					 clk_base + REG_CLK_APBCLK1, 17);
+	hws[WDT2_MUX] = ma35d1_clk_mux("wdt2_mux",
+				       clk_base + REG_CLK_CLKSEL3,
+				       28, 2, wdt2_sel_clks,
+				       ARRAY_SIZE(wdt2_sel_clks));
+	hws[WDT2_GATE] = ma35d1_clk_gate("wdt2_gate", "wdt2_mux",
+				       clk_base + REG_CLK_APBCLK1, 18);
+
+	hws[WWDT0_MUX] = ma35d1_clk_mux("wwdt0_mux",
+					clk_base + REG_CLK_CLKSEL3,
+					22, 2, wwdt0_sel_clks,
+					ARRAY_SIZE(wwdt0_sel_clks));
+	hws[WWDT1_MUX] = ma35d1_clk_mux("wwdt1_mux",
+					clk_base + REG_CLK_CLKSEL3,
+					26, 2, wwdt1_sel_clks,
+					ARRAY_SIZE(wwdt1_sel_clks));
+	hws[WWDT2_MUX] = ma35d1_clk_mux("wwdt2_mux",
+					clk_base + REG_CLK_CLKSEL3,
+					30, 2, wwdt2_sel_clks,
+					ARRAY_SIZE(wwdt2_sel_clks));
+
+	hws[EPWM0_GATE] = ma35d1_clk_gate("epwm0_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK1, 24);
+	hws[EPWM1_GATE] = ma35d1_clk_gate("epwm1_gate", "pclk2",
+					  clk_base + REG_CLK_APBCLK1, 25);
+	hws[EPWM2_GATE] = ma35d1_clk_gate("epwm2_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK1, 26);
+
+	hws[I2S0_MUX] = ma35d1_clk_mux("i2s0_mux",
+				       clk_base + REG_CLK_CLKSEL4,
+				       12, 2, i2s0_sel_clks,
+				       ARRAY_SIZE(i2s0_sel_clks));
+	hws[I2S0_GATE] = ma35d1_clk_gate("i2s0_gate", "i2s0_mux",
+					 clk_base + REG_CLK_APBCLK2, 0);
+	hws[I2S1_MUX] = ma35d1_clk_mux("i2s1_mux",
+				       clk_base + REG_CLK_CLKSEL4,
+				       14, 2, i2s1_sel_clks,
+				       ARRAY_SIZE(i2s1_sel_clks));
+	hws[I2S1_GATE] = ma35d1_clk_gate("i2s1_gate", "i2s1_mux",
+					 clk_base + REG_CLK_APBCLK2, 1);
+
+	hws[SSMCC_GATE] = ma35d1_clk_gate("ssmcc_gate", "pclk3",
+					  clk_base + REG_CLK_APBCLK2, 2);
+	hws[SSPCC_GATE] = ma35d1_clk_gate("sspcc_gate", "pclk3",
+					  clk_base + REG_CLK_APBCLK2, 3);
+
+	hws[SPI0_MUX] = ma35d1_clk_mux("spi0_mux",
+				       clk_base + REG_CLK_CLKSEL4,
+				       0, 2, spi0_sel_clks,
+				       ARRAY_SIZE(spi0_sel_clks));
+	hws[SPI0_GATE] = ma35d1_clk_gate("spi0_gate", "spi0_mux",
+					 clk_base + REG_CLK_APBCLK2, 4);
+	hws[SPI1_MUX] = ma35d1_clk_mux("spi1_mux",
+				       clk_base + REG_CLK_CLKSEL4,
+				       2, 2, spi1_sel_clks,
+				       ARRAY_SIZE(spi1_sel_clks));
+	hws[SPI1_GATE] = ma35d1_clk_gate("spi1_gate", "spi1_mux",
+					 clk_base + REG_CLK_APBCLK2, 5);
+	hws[SPI2_MUX] = ma35d1_clk_mux("spi2_mux",
+				       clk_base + REG_CLK_CLKSEL4,
+				       4, 2, spi2_sel_clks,
+				       ARRAY_SIZE(spi2_sel_clks));
+	hws[SPI2_GATE] = ma35d1_clk_gate("spi2_gate", "spi2_mux",
+					 clk_base + REG_CLK_APBCLK2, 6);
+	hws[SPI3_MUX] = ma35d1_clk_mux("spi3_mux",
+				       clk_base + REG_CLK_CLKSEL4,
+				       6, 2, spi3_sel_clks,
+				       ARRAY_SIZE(spi3_sel_clks));
+	hws[SPI3_GATE] = ma35d1_clk_gate("spi3_gate", "spi3_mux",
+					 clk_base + REG_CLK_APBCLK2, 7);
+
+	hws[ECAP0_GATE] = ma35d1_clk_gate("ecap0_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK2, 8);
+	hws[ECAP1_GATE] = ma35d1_clk_gate("ecap1_gate", "pclk2",
+					  clk_base + REG_CLK_APBCLK2, 9);
+	hws[ECAP2_GATE] = ma35d1_clk_gate("ecap2_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK2, 10);
+
+	hws[QEI0_GATE] = ma35d1_clk_gate("qei0_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK2, 12);
+	hws[QEI1_GATE] = ma35d1_clk_gate("qei1_gate", "pclk2",
+					 clk_base + REG_CLK_APBCLK2, 13);
+	hws[QEI2_GATE] = ma35d1_clk_gate("qei2_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK2, 14);
+
+	hws[ADC_DIV] = ma35d1_reg_adc_clkdiv(&pdev->dev, "adc_div", "pclk0",
+					     &ma35d1_lock, 0,
+					     clk_base + REG_CLK_CLKDIV4,
+					     4, 17, 0x1ffff);
+	hws[ADC_GATE] = ma35d1_clk_gate("adc_gate", "adc_div",
+					clk_base + REG_CLK_APBCLK2, 24);
+
+	hws[EADC_DIV] = ma35d1_clk_divider_table("eadc_div", "pclk2",
+						 clk_base + REG_CLK_CLKDIV4,
+						 0, 4, eadc_div_table);
+	hws[EADC_GATE] = ma35d1_clk_gate("eadc_gate", "eadc_div",
+					 clk_base + REG_CLK_APBCLK2, 25);
+
+	return devm_of_clk_add_hw_provider(&pdev->dev,
+					   of_clk_hw_onecell_get,
+					   ma35d1_hw_data);
+}
+
+static const struct of_device_id ma35d1_clk_of_match[] = {
+	{ .compatible = "nuvoton,ma35d1-clk" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ma35d1_clk_of_match);
+
+static struct platform_driver ma35d1_clk_driver = {
+	.probe = ma35d1_clocks_probe,
+	.driver = {
+		.name = "ma35d1-clk",
+		.of_match_table = ma35d1_clk_of_match,
+	},
+};
+
+static int __init ma35d1_clocks_init(void)
+{
+	return platform_driver_register(&ma35d1_clk_driver);
+}
+
+postcore_initcall(ma35d1_clocks_init);
+
+MODULE_AUTHOR("Chi-Fang Li <cfli0@nuvoton.com>");
+MODULE_DESCRIPTION("NUVOTON MA35D1 Clock Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/clk/nuvoton/clk-ma35d1.h b/drivers/clk/nuvoton/clk-ma35d1.h
new file mode 100644
index 000000000000..2c47667bfd5d
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Chi-Fang Li <cfli0@nuvoton.com>
+ */
+
+#ifndef __DRV_CLK_NUVOTON_MA35D1_H
+#define __DRV_CLK_NUVOTON_MA35D1_H
+
+enum ma35d1_pll_type {
+	MA35D1_CAPLL,
+	MA35D1_DDRPLL,
+	MA35D1_APLL,
+	MA35D1_EPLL,
+	MA35D1_VPLL,
+};
+
+enum ma35d1_pll_mode {
+	PLL_MODE_INT,
+	PLL_MODE_FRAC,
+	PLL_MODE_SS,
+};
+
+#define PLL_MAX_NUM		5
+
+/* PLL frequency limits */
+#define PLL_FREF_MAX_FREQ	200000000UL
+#define PLL_FREF_MIN_FREQ	1000000UL
+#define PLL_FREF_M_MAX_FREQ	40000000UL
+#define PLL_FREF_M_MIN_FREQ	10000000UL
+#define PLL_FCLK_MAX_FREQ	2400000000UL
+#define PLL_FCLK_MIN_FREQ	600000000UL
+#define PLL_FCLKO_MAX_FREQ	2400000000UL
+#define PLL_FCLKO_MIN_FREQ	85700000UL
+#define PLL_SS_RATE		0x77
+#define PLL_SLOPE		0x58CFA
+
+/* Clock Control Registers Offset */
+#define REG_CLK_PWRCTL		0x00
+#define REG_CLK_SYSCLK0		0x04
+#define REG_CLK_SYSCLK1		0x08
+#define REG_CLK_APBCLK0		0x0C
+#define REG_CLK_APBCLK1		0x10
+#define REG_CLK_APBCLK2		0x14
+#define REG_CLK_CLKSEL0		0x18
+#define REG_CLK_CLKSEL1		0x1C
+#define REG_CLK_CLKSEL2		0x20
+#define REG_CLK_CLKSEL3		0x24
+#define REG_CLK_CLKSEL4		0x28
+#define REG_CLK_CLKDIV0		0x2C
+#define REG_CLK_CLKDIV1		0x30
+#define REG_CLK_CLKDIV2		0x34
+#define REG_CLK_CLKDIV3		0x38
+#define REG_CLK_CLKDIV4		0x3C
+#define REG_CLK_CLKOCTL		0x40
+#define REG_CLK_STATUS		0x50
+#define REG_CLK_PLL0CTL0	0x60
+#define REG_CLK_PLL2CTL0	0x80
+#define REG_CLK_PLL2CTL1	0x84
+#define REG_CLK_PLL2CTL2	0x88
+#define REG_CLK_PLL3CTL0	0x90
+#define REG_CLK_PLL3CTL1	0x94
+#define REG_CLK_PLL3CTL2	0x98
+#define REG_CLK_PLL4CTL0	0xA0
+#define REG_CLK_PLL4CTL1	0xA4
+#define REG_CLK_PLL4CTL2	0xA8
+#define REG_CLK_PLL5CTL0	0xB0
+#define REG_CLK_PLL5CTL1	0xB4
+#define REG_CLK_PLL5CTL2	0xB8
+#define REG_CLK_CLKDCTL		0xC0
+#define REG_CLK_CLKDSTS		0xC4
+#define REG_CLK_CDUPB		0xC8
+#define REG_CLK_CDLOWB		0xCC
+#define REG_CLK_CKFLTRCTL	0xD0
+#define REG_CLK_TESTCLK		0xF0
+#define REG_CLK_PLLCTL		0x40
+
+#define REG_PLL_CTL0_OFFSET	0x0
+#define REG_PLL_CTL1_OFFSET	0x4
+#define REG_PLL_CTL2_OFFSET	0x8
+
+/* bit fields for REG_CLK_PLL0CTL0, which is SMIC PLL design */
+#define SPLL0_CTL0_FBDIV	GENMASK(7, 0)
+#define SPLL0_CTL0_INDIV	GENMASK(11, 8)
+#define SPLL0_CTL0_OUTDIV	GENMASK(13, 12)
+#define SPLL0_CTL0_PD		BIT(16)
+#define SPLL0_CTL0_BP		BIT(17)
+
+/* bit fields for REG_CLK_PLLxCTL0 ~ REG_CLK_PLLxCTL2, where x = 2 ~ 5 */
+#define PLL_CTL0_FBDIV		GENMASK(10, 0)
+#define PLL_CTL0_INDIV		GENMASK(17, 12)
+#define PLL_CTL0_MODE		GENMASK(19, 18)
+#define PLL_CTL0_SSRATE		GENMASK(30, 20)
+#define PLL_CTL1_PD		BIT(0)
+#define PLL_CTL1_BP		BIT(1)
+#define PLL_CTL1_OUTDIV		GENMASK(6, 4)
+#define PLL_CTL1_FRAC		GENMASK(31, 24)
+#define PLL_CTL2_SLOPE		GENMASK(23, 0)
+
+#define INDIV_MIN		1
+#define INDIV_MAX		63
+#define FBDIV_MIN		16
+#define FBDIV_MAX		2047
+#define FBDIV_FRAC_MIN		1600
+#define FBDIV_FRAC_MAX		204700
+#define OUTDIV_MIN		1
+#define OUTDIV_MAX		7
+
+struct clk_hw *ma35d1_reg_clk_pll(enum ma35d1_pll_type type, u8 u8mode,
+				 const char *name, const char *parent,
+				 unsigned long targetFreq,
+				 void __iomem *base,
+				 struct regmap *regmap);
+
+struct clk_hw *ma35d1_reg_adc_clkdiv(struct device *dev,
+				    const char *name,
+				    const char *parent_name,
+				    spinlock_t *lock,
+				    unsigned long flags,
+				    void __iomem *reg, u8 shift,
+				    u8 width, u32 mask_bit);
+
+#endif /* __DRV_CLK_NUVOTON_MA35D1_H */
-- 
2.34.1

[PATCH v6 10/12] reset: Add Nuvoton ma35d1 reset driver support

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

This driver supports individual IP reset for ma35d1. The reset
control registers is a subset of system control registers.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 drivers/reset/Kconfig        |   6 ++
 drivers/reset/Makefile       |   1 +
 drivers/reset/reset-ma35d1.c | 152 +++++++++++++++++++++++++++++++++++
 3 files changed, 159 insertions(+)
 create mode 100644 drivers/reset/reset-ma35d1.c

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 2a52c990d4fe..58477c6ca9b8 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -143,6 +143,12 @@ config RESET_NPCM
 	  This enables the reset controller driver for Nuvoton NPCM
 	  BMC SoCs.
 
+config RESET_NUVOTON_MA35D1
+	bool "Nuvton MA35D1 Reset Driver"
+	default ARCH_NUVOTON || COMPILE_TEST
+	help
+	  This enables the reset controller driver for Nuvoton MA35D1 SoC.
+
 config RESET_OXNAS
 	bool
 
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 3e7e5fd633a8..fd52dcf66a99 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_RESET_MCHP_SPARX5) += reset-microchip-sparx5.o
 obj-$(CONFIG_RESET_MESON) += reset-meson.o
 obj-$(CONFIG_RESET_MESON_AUDIO_ARB) += reset-meson-audio-arb.o
 obj-$(CONFIG_RESET_NPCM) += reset-npcm.o
+obj-$(CONFIG_RESET_NUVOTON_MA35D1) += reset-ma35d1.o
 obj-$(CONFIG_RESET_OXNAS) += reset-oxnas.o
 obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o
 obj-$(CONFIG_RESET_POLARFIRE_SOC) += reset-mpfs.o
diff --git a/drivers/reset/reset-ma35d1.c b/drivers/reset/reset-ma35d1.c
new file mode 100644
index 000000000000..221299e7b873
--- /dev/null
+++ b/drivers/reset/reset-ma35d1.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Chi-Fang Li <cfli0@nuvoton.com>
+ */
+
+#include <linux/device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+#include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+
+#define REG_SYS_IPRST0		0x020
+#define REG_SYS_IPRST1		0x024
+#define REG_SYS_IPRST2		0x028
+#define REG_SYS_IPRST3		0x02C
+
+#define RST_PRE_REG	32
+
+struct ma35d1_reset_data {
+	struct reset_controller_dev rcdev;
+	struct regmap *regmap;
+};
+
+struct ma35d1_reboot_data {
+	struct notifier_block restart_handler;
+	struct regmap *regmap;
+};
+
+static int ma35d1_restart_handler(struct notifier_block *this,
+				  unsigned long mode, void *cmd)
+{
+	struct ma35d1_reboot_data *data =
+			container_of(this, struct ma35d1_reboot_data,
+				     restart_handler);
+	return regmap_write(data->regmap, REG_SYS_IPRST0, 1 << MA35D1_RESET_CHIP);
+}
+
+static int ma35d1_reset_update(struct reset_controller_dev *rcdev,
+			       unsigned long id, bool assert)
+{
+	unsigned int reg;
+	int ret;
+	int offset = (id / RST_PRE_REG) * 4;
+	struct ma35d1_reset_data *data =
+			container_of(rcdev, struct ma35d1_reset_data, rcdev);
+
+	ret = regmap_read(data->regmap, REG_SYS_IPRST0 + offset, &reg);
+	if (ret < 0)
+		return ret;
+	if (assert)
+		reg |= 1 << (id % RST_PRE_REG);
+	else
+		reg &= ~(1 << (id % RST_PRE_REG));
+
+	return regmap_write(data->regmap, REG_SYS_IPRST0 + offset, reg);
+}
+
+static int ma35d1_reset_assert(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	return ma35d1_reset_update(rcdev, id, true);
+}
+
+static int ma35d1_reset_deassert(struct reset_controller_dev *rcdev,
+				 unsigned long id)
+{
+	return ma35d1_reset_update(rcdev, id, false);
+}
+
+static int ma35d1_reset_status(struct reset_controller_dev *rcdev,
+			      unsigned long id)
+{
+	int reg, ret;
+	int offset = id / RST_PRE_REG;
+	struct ma35d1_reset_data *data =
+			container_of(rcdev, struct ma35d1_reset_data, rcdev);
+
+	ret = regmap_read(data->regmap, REG_SYS_IPRST0 + offset, &reg);
+	if (ret < 0)
+		return ret;
+	return !!(reg & BIT(id % RST_PRE_REG));
+}
+
+static const struct reset_control_ops ma35d1_reset_ops = {
+	.assert = ma35d1_reset_assert,
+	.deassert = ma35d1_reset_deassert,
+	.status = ma35d1_reset_status,
+};
+
+static const struct of_device_id ma35d1_reset_dt_ids[] = {
+	{ .compatible = "nuvoton,ma35d1-reset" },
+	{ },
+};
+
+static int ma35d1_reset_probe(struct platform_device *pdev)
+{
+	int err;
+	struct device *dev = &pdev->dev;
+	struct device_node *parent;
+	struct ma35d1_reset_data *reset_data;
+	struct ma35d1_reboot_data *reboot_data;
+
+	if (!pdev->dev.of_node) {
+		dev_err(&pdev->dev, "Device tree node not found\n");
+		return -EINVAL;
+	}
+
+	reset_data = devm_kzalloc(dev, sizeof(*reset_data), GFP_KERNEL);
+	if (!reset_data)
+		return -ENOMEM;
+
+	reboot_data = devm_kzalloc(dev, sizeof(*reboot_data), GFP_KERNEL);
+	if (!reboot_data)
+		return -ENOMEM;
+
+	parent = of_get_parent(dev->of_node); /* parent should be syscon node */
+	reset_data->regmap = syscon_node_to_regmap(parent);
+	of_node_put(parent);
+	if (IS_ERR(reset_data->regmap)) {
+		dev_err(&pdev->dev, "Failed to get SYS register base\n");
+		return PTR_ERR(reset_data->regmap);
+	}
+
+	reset_data->rcdev.owner = THIS_MODULE;
+	reset_data->rcdev.nr_resets = MA35D1_RESET_COUNT;
+	reset_data->rcdev.ops = &ma35d1_reset_ops;
+	reset_data->rcdev.of_node = dev->of_node;
+
+	reboot_data->regmap = reset_data->regmap;
+	reboot_data->restart_handler.notifier_call = ma35d1_restart_handler;
+	reboot_data->restart_handler.priority = 192;
+
+	err = register_restart_handler(&reboot_data->restart_handler);
+	if (err)
+		dev_warn(&pdev->dev, "failed to register restart handler\n");
+
+	return devm_reset_controller_register(dev, &reset_data->rcdev);
+}
+
+static struct platform_driver ma35d1_reset_driver = {
+	.probe = ma35d1_reset_probe,
+	.driver = {
+		.name = "ma35d1-reset",
+		.of_match_table	= ma35d1_reset_dt_ids,
+	},
+};
+
+builtin_platform_driver(ma35d1_reset_driver);
-- 
2.34.1

[PATCH v6 11/12] tty: serial: Add Nuvoton ma35d1 serial driver support

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

This adds UART and console driver for Nuvoton ma35d1 Soc.
It supports full-duplex communication, FIFO control, and
hardware flow control.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 drivers/tty/serial/Kconfig         |  18 +
 drivers/tty/serial/Makefile        |   1 +
 drivers/tty/serial/ma35d1_serial.c | 802 +++++++++++++++++++++++++++++
 3 files changed, 821 insertions(+)
 create mode 100644 drivers/tty/serial/ma35d1_serial.c

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 0072892ca7fc..daa4ae6bc08e 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1562,6 +1562,24 @@ config SERIAL_SUNPLUS_CONSOLE
 	  you can alter that using a kernel command line option such as
 	  "console=ttySUPx".
 
+config SERIAL_NUVOTON_MA35D1
+	tristate "Nuvoton MA35D1 family UART support"
+	depends on ARCH_NUVOTON || COMPILE_TEST
+	select SERIAL_CORE
+	help
+	  This driver supports Nuvoton MA35D1 family UART ports. If you would
+	  like to use them, you must answer Y or M to this option. Note that
+	  for use as console, it must be included in kernel and not as a
+	  module
+
+config SERIAL_NUVOTON_MA35D1_CONSOLE
+	bool "Console on a Nuvotn MA35D1 family UART port"
+	depends on SERIAL_NUVOTON_MA35D1=y
+	select SERIAL_CORE_CONSOLE
+	help
+	  Select this options if you'd like to use the UART port0 of the
+	  Nuvoton MA35D1 family as a console.
+
 endmenu
 
 config SERIAL_MCTRL_GPIO
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index cd9afd9e3018..71ebeba06ff2 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -93,3 +93,4 @@ obj-$(CONFIG_SERIAL_MCTRL_GPIO)	+= serial_mctrl_gpio.o
 
 obj-$(CONFIG_SERIAL_KGDB_NMI) += kgdb_nmi.o
 obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o
+obj-$(CONFIG_SERIAL_NUVOTON_MA35D1)	+= ma35d1_serial.o
diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
new file mode 100644
index 000000000000..75618ab0b2ca
--- /dev/null
+++ b/drivers/tty/serial/ma35d1_serial.c
@@ -0,0 +1,802 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  MA35D1 serial driver
+ *  Copyright (C) 2023 Nuvoton Technology Corp.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/serial_core.h>
+#include <linux/slab.h>
+#include <linux/tty_flip.h>
+
+#define UART_NR			17
+
+#define UART_REG_RBR		0x00
+#define UART_REG_THR		0x00
+#define UART_REG_IER		0x04
+#define UART_REG_FCR		0x08
+#define UART_REG_LCR		0x0C
+#define UART_REG_MCR		0x10
+#define UART_REG_MSR		0x14
+#define UART_REG_FSR		0x18
+#define UART_REG_ISR		0x1C
+#define UART_REG_TOR		0x20
+#define UART_REG_BAUD		0x24
+#define UART_REG_ALTCTL		0x2C
+#define UART_FUN_SEL		0x30
+#define UART_REG_WKCTL		0x40
+#define UART_REG_WKSTS		0x44
+
+/* UART_REG_IER - Interrupt Enable Register */
+#define IER_RDA_IEN		BIT(0)  /* RBR Available Interrupt Enable */
+#define IER_THRE_IEN		BIT(1)  /* THR Empty Interrupt Enable */
+#define IER_RLS_IEN		BIT(2)  /* RX Line Status Interrupt Enable */
+#define IER_RTO_IEN		BIT(4)  /* RX Time-out Interrupt Enable */
+#define IER_BUFERR_IEN		BIT(5)  /* Buffer Error Interrupt Enable */
+#define IER_TIME_OUT_EN		BIT(11) /* RX Buffer Time-out Counter Enable */
+#define IER_AUTO_RTS		BIT(12) /* nRTS Auto-flow Control Enable */
+#define IER_AUTO_CTS		BIT(13) /* nCTS Auto-flow Control Enable */
+
+/* UART_REG_FCR - FIFO Control Register */
+#define FCR_RFR			BIT(1)  /* RX Field Software Reset */
+#define FCR_TFR			BIT(2)  /* TX Field Software Reset */
+#define FCR_RFITL_MASK		GENMASK(7, 4) /* RX FIFO Interrupt Trigger Level */
+#define FCR_RFITL_1BYTE		FIELD_PREP(FCR_RFITL_MASK, 0)
+#define FCR_RFITL_4BYTES	FIELD_PREP(FCR_RFITL_MASK, 1)
+#define FCR_RFITL_8BYTES	FIELD_PREP(FCR_RFITL_MASK, 2)
+#define FCR_RFITL_14BYTES	FIELD_PREP(FCR_RFITL_MASK, 3)
+#define FCR_RFITL_30BYTES	FIELD_PREP(FCR_RFITL_MASK, 4)
+#define FCR_RTSTRGLV_MASK	GENMASK(19, 16) /* nRTS Trigger Level */
+#define FCR_RTSTRGLV_1BYTE	FIELD_PREP(FCR_RTSTRGLV_MASK, 0)
+#define FCR_RTSTRGLV_4BYTES	FIELD_PREP(FCR_RTSTRGLV_MASK, 1)
+#define FCR_RTSTRGLV_8BYTES	FIELD_PREP(FCR_RTSTRGLV_MASK, 2)
+#define FCR_RTSTRGLV_14BYTES	FIELD_PREP(FCR_RTSTRGLV_MASK, 3)
+#define FCR_RTSTRGLVL_30BYTES	FIELD_PREP(FCR_RTSTRGLV_MASK, 4)
+
+/* UART_REG_LCR - Line Control Register */
+#define	LCR_NSB			BIT(2) /* Number of “STOP Bit” */
+#define LCR_PBE			BIT(3) /* Parity Bit Enable */
+#define LCR_EPE			BIT(4) /* Even Parity Enable */
+#define LCR_SPE			BIT(5) /* Stick Parity Enable */
+#define LCR_BREAK		BIT(6) /* Break Control */
+#define LCR_WLS_MASK		GENMASK(1, 0) /* Word Length Selection */
+#define LCR_WLS_5BITS		FIELD_PREP(LCR_WLS_MASK, 0)
+#define LCR_WLS_6BITS		FIELD_PREP(LCR_WLS_MASK, 1)
+#define LCR_WLS_7BITS		FIELD_PREP(LCR_WLS_MASK, 2)
+#define LCR_WLS_8BITS		FIELD_PREP(LCR_WLS_MASK, 3)
+
+/* UART_REG_MCR - Modem Control Register */
+#define MCR_RTS_CTRL		BIT(1)  /* nRTS Signal Control */
+#define MCR_RTSACTLV		BIT(9)  /* nRTS Pin Active Level */
+#define MCR_RTSSTS		BIT(13) /* nRTS Pin Status (Read Only) */
+
+/* UART_REG_MSR - Modem Status Register */
+#define MSR_CTSDETF		BIT(0)  /* Detect nCTS State Change Flag */
+#define MSR_CTSSTS		BIT(4)  /* nCTS Pin Status (Read Only) */
+#define MSR_CTSACTLV		BIT(8)  /* nCTS Pin Active Level */
+
+/* UART_REG_FSR - FIFO Status Register */
+#define FSR_RX_OVER_IF		BIT(0)  /* RX Overflow Error Interrupt Flag */
+#define FSR_PEF			BIT(4)  /* Parity Error Flag*/
+#define FSR_FEF			BIT(5)  /* Framing Error Flag */
+#define FSR_BIF			BIT(6)  /* Break Interrupt Flag */
+#define FSR_RX_EMPTY		BIT(14) /* Receiver FIFO Empty (Read Only) */
+#define FSR_RX_FULL		BIT(15) /* Receiver FIFO Full (Read Only) */
+#define FSR_TX_EMPTY		BIT(22) /* Transmitter FIFO Empty (Read Only) */
+#define FSR_TX_FULL		BIT(23) /* Transmitter FIFO Full (Read Only) */
+#define FSR_TX_OVER_IF		BIT(24) /* TX Overflow Error Interrupt Flag */
+#define FSR_TE_FLAG		BIT(28) /* Transmitter Empty Flag (Read Only) */
+#define FSR_RXPTR_MSK		GENMASK(13, 8) /* TX FIFO Pointer mask */
+#define FSR_TXPTR_MSK		GENMASK(21, 16) /* RX FIFO Pointer mask */
+
+/* UART_REG_ISR - Interrupt Status Register */
+#define ISR_RDA_IF		BIT(0) /* RBR Available Interrupt Flag */
+#define ISR_THRE_IF		BIT(1) /* THR Empty Interrupt Flag */
+#define ISR_RLSIF		BIT(2) /* Receive Line Interrupt Flag */
+#define ISR_MODEMIF		BIT(3) /* MODEM Interrupt Flag */
+#define ISR_RXTO_IF		BIT(4) /* RX Time-out Interrupt Flag */
+#define ISR_BUFEIF		BIT(5) /* Buffer Error Interrupt Flag */
+#define UART_ISR_WK_IF		BIT(6) /* UART Wake-up Interrupt Flag */
+#define UART_ISR_RDAINT		BIT(8) /* RBR Available Interrupt Indicator */
+#define ISR_THRE_INT		BIT(9) /* THR Empty Interrupt Indicator */
+#define ISR_ALL			0xFFFFFFFF
+
+/* UART_REG_BAUD - Baud Rate Divider Register */
+#define	BAUD_MODE_MASK		GENMASK(29, 28)
+#define BAUD_MODE0		FIELD_PREP(BAUD_MODE_MASK, 0)
+#define BAUD_MODE1		FIELD_PREP(BAUD_MODE_MASK, 2)
+#define BAUD_MODE2		FIELD_PREP(BAUD_MODE_MASK, 3)
+
+/* UART_REG_ALTCTL - Alternate Control/Status Register */
+#define ALTCTL_RS485AUD		BIT(10) /* RS-485 Auto Direction Function */
+
+/* UART_FUN_SEL - Function Select Register */
+#define FUN_SEL_MASK		GENMASK(2, 0)
+#define FUN_SEL_UART		FIELD_PREP(FUN_SEL_MASK, 0)
+#define FUN_SEL_RS485		FIELD_PREP(FUN_SEL_MASK, 3)
+
+/* UART FIFO depth */
+#define UART_FIFO_DEPTH		32
+/* UART console clock */
+#define UART_CONSOLE_CLK	24000000
+/* UART register ioremap size */
+#define UART_REG_SIZE		0x100
+/* Rx Timeout */
+#define UART_RX_TOUT		0x40
+
+#define UART_ISR_IF_CHECK (ISR_RDA_IF | ISR_RXTO_IF | ISR_THRE_INT | ISR_BUFEIF)
+
+#define LOOP_TIMEOUT		1000
+
+static struct uart_driver ma35d1serial_reg;
+struct clk *clk;
+
+struct uart_ma35d1_port {
+	struct uart_port port;
+	u16 capabilities; /* port capabilities */
+	u8 ier;
+	u8 lcr;
+	u8 mcr;
+	u32 baud_rate;
+	u32 console_baud_rate;
+	u32 console_line;
+	u32 console_int;
+};
+
+static struct device_node *ma35d1serial_uart_nodes[UART_NR];
+static struct uart_ma35d1_port ma35d1serial_ports[UART_NR] = { 0 };
+
+static struct uart_ma35d1_port *to_ma35d1_uart_port(struct uart_port *uart)
+{
+	return container_of(uart, struct uart_ma35d1_port, port);
+}
+
+static u32 serial_in(struct uart_ma35d1_port *p, u32 offset)
+{
+	return readl_relaxed(p->port.membase + offset);
+}
+
+static void serial_out(struct uart_ma35d1_port *p, u32 offset, u32 value)
+{
+	writel_relaxed(value, p->port.membase + offset);
+}
+
+static void __stop_tx(struct uart_ma35d1_port *p)
+{
+	u32 ier;
+
+	ier = serial_in(p, UART_REG_IER);
+	if (ier & IER_THRE_IEN)
+		serial_out(p, UART_REG_IER, ier & ~IER_THRE_IEN);
+}
+
+static void ma35d1serial_stop_tx(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	__stop_tx(up);
+}
+
+static void transmit_chars(struct uart_ma35d1_port *up)
+{
+	struct circ_buf *xmit = &up->port.state->xmit;
+	int count;
+	u8 ch;
+
+	if (uart_tx_stopped(&up->port)) {
+		ma35d1serial_stop_tx(&up->port);
+		return;
+	}
+	if (uart_circ_empty(xmit)) {
+		__stop_tx(up);
+		return;
+	}
+
+	count = UART_FIFO_DEPTH - ((serial_in(up, UART_REG_FSR) & FSR_TXPTR_MSK) >> 16);
+
+	uart_port_tx_limited(&up->port, ch, count,
+			     !(serial_in(up, UART_REG_FSR) & FSR_TX_FULL),
+			     serial_out(up, UART_REG_THR, ch),
+			     ({}));
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(&up->port);
+
+	if (uart_circ_empty(xmit))
+		__stop_tx(up);
+}
+
+static void ma35d1serial_start_tx(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	u32 ier;
+
+	ier = serial_in(up, UART_REG_IER);
+	serial_out(up, UART_REG_IER, ier & ~IER_THRE_IEN);
+	transmit_chars(up);
+	serial_out(up, UART_REG_IER, ier | IER_THRE_IEN);
+}
+
+static void ma35d1serial_stop_rx(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	serial_out(up, UART_REG_IER, serial_in(up, UART_REG_IER) & ~IER_RDA_IEN);
+}
+
+static void receive_chars(struct uart_ma35d1_port *up)
+{
+	u8 flag;
+	u32 fsr;
+	unsigned int ch;
+	int max_count = 256;
+
+	fsr = serial_in(up, UART_REG_FSR);
+	do {
+		flag = TTY_NORMAL;
+		up->port.icount.rx++;
+
+		if (unlikely(fsr & (FSR_BIF | FSR_FEF | FSR_PEF | FSR_RX_OVER_IF))) {
+			if (fsr & FSR_BIF) {
+				up->port.icount.brk++;
+				if (uart_handle_break(&up->port))
+					continue;
+			}
+			if (fsr & FSR_FEF)
+				up->port.icount.frame++;
+			if (fsr & FSR_PEF)
+				up->port.icount.parity++;
+			if (fsr & FSR_RX_OVER_IF)
+				up->port.icount.overrun++;
+
+			serial_out(up, UART_REG_FSR, fsr &
+				   (FSR_BIF | FSR_FEF | FSR_PEF | FSR_RX_OVER_IF));
+
+			if (fsr & FSR_BIF)
+				flag = TTY_BREAK;
+			else if (fsr & FSR_PEF)
+				flag = TTY_PARITY;
+			else if (fsr & FSR_FEF)
+				flag = TTY_FRAME;
+		}
+
+		ch = serial_in(up, UART_REG_RBR);
+		if (uart_handle_sysrq_char(&up->port, ch))
+			continue;
+
+		spin_lock(&up->port.lock);
+		uart_insert_char(&up->port, fsr, FSR_RX_OVER_IF, ch, flag);
+		spin_unlock(&up->port.lock);
+
+		fsr = serial_in(up, UART_REG_FSR);
+	} while (!(fsr & FSR_RX_EMPTY) && (max_count-- > 0));
+
+	spin_lock(&up->port.lock);
+	tty_flip_buffer_push(&up->port.state->port);
+	spin_unlock(&up->port.lock);
+}
+
+static irqreturn_t ma35d1serial_interrupt(int irq, void *dev_id)
+{
+	struct uart_port *port = dev_id;
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	u32 isr, fsr;
+
+	isr = serial_in(up, UART_REG_ISR);
+	fsr = serial_in(up, UART_REG_FSR);
+
+	if (!(isr & UART_ISR_IF_CHECK))
+		return IRQ_NONE;
+
+	if (isr & (ISR_RDA_IF | ISR_RXTO_IF))
+		receive_chars(up);
+	if (isr & ISR_THRE_INT)
+		transmit_chars(up);
+	if (fsr & FSR_TX_OVER_IF)
+		serial_out(up, UART_REG_FSR, FSR_TX_OVER_IF);
+
+	return IRQ_HANDLED;
+}
+
+static u32 ma35d1serial_tx_empty(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	u32 fsr;
+
+	fsr = serial_in(up, UART_REG_FSR);
+	return (fsr & (FSR_TE_FLAG | FSR_TX_EMPTY)) ==
+		(FSR_TE_FLAG | FSR_TX_EMPTY) ? TIOCSER_TEMT : 0;
+}
+
+static u32 ma35d1serial_get_mctrl(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	u32 status;
+	u32 ret = 0;
+
+	status = serial_in(up, UART_REG_MSR);
+	if (!(status & MSR_CTSSTS))
+		ret |= TIOCM_CTS;
+	return ret;
+}
+
+static void ma35d1serial_set_mctrl(struct uart_port *port, u32 mctrl)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	u32 mcr = 0;
+	u32 ier = 0;
+
+	if (mctrl & TIOCM_RTS) {
+		mcr = serial_in(up, UART_REG_MCR);
+		mcr |= MCR_RTSACTLV;
+		mcr &= ~MCR_RTS_CTRL;
+	}
+	if (up->mcr & UART_MCR_AFE) {
+		mcr = serial_in(up, UART_REG_MCR);
+		mcr |= MCR_RTSACTLV;
+		mcr &= ~MCR_RTS_CTRL;
+
+		serial_out(up, UART_REG_IER,
+			   (serial_in(up, UART_REG_IER) | IER_AUTO_RTS | IER_AUTO_CTS));
+
+		up->port.flags |= UPF_HARD_FLOW;
+	} else {
+		ier = serial_in(up, UART_REG_IER);
+		ier &= ~(IER_AUTO_RTS | IER_AUTO_CTS);
+		serial_out(up, UART_REG_IER, ier);
+
+		up->port.flags &= ~UPF_HARD_FLOW;
+	}
+	serial_out(up, UART_REG_MSR, (serial_in(up, UART_REG_MSR) | MSR_CTSACTLV));
+	serial_out(up, UART_REG_MCR, mcr);
+}
+
+static void ma35d1serial_break_ctl(struct uart_port *port, int break_state)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	unsigned long flags;
+	u32 lcr;
+
+	spin_lock_irqsave(&up->port.lock, flags);
+	lcr = serial_in(up, UART_REG_LCR);
+	if (break_state != 0)
+		lcr |= LCR_BREAK;
+	else
+		lcr &= ~LCR_BREAK;
+	serial_out(up, UART_REG_LCR, lcr);
+	spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static int ma35d1serial_startup(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	int retval;
+
+	/* Reset FIFO */
+	serial_out(up, UART_REG_FCR, FCR_TFR | FCR_RFR);
+
+	/* Clear pending interrupts */
+	serial_out(up, UART_REG_ISR, ISR_ALL);
+
+	retval = request_irq(port->irq, ma35d1serial_interrupt, 0,
+			     dev_name(port->dev), port);
+	if (retval) {
+		dev_err(up->port.dev, "request irq failed.\n");
+		return retval;
+	}
+
+	serial_out(up, UART_REG_FCR, serial_in(up, UART_REG_FCR) |
+		   FCR_RFITL_4BYTES | FCR_RTSTRGLV_8BYTES);
+	serial_out(up, UART_REG_LCR, LCR_WLS_8BITS);
+	serial_out(up, UART_REG_TOR, UART_RX_TOUT);
+	serial_out(up, UART_REG_IER, IER_RTO_IEN | IER_RDA_IEN |
+		   IER_TIME_OUT_EN | IER_BUFERR_IEN);
+	return 0;
+}
+
+static void ma35d1serial_shutdown(struct uart_port *port)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	serial_out(up, UART_REG_IER, 0);
+	free_irq(port->irq, port);
+}
+
+static u32 ma35d1serial_get_divisor(struct uart_port *port, u32 baud)
+{
+	return (port->uartclk / baud) - 2;
+}
+
+static void ma35d1serial_set_termios(struct uart_port *port,
+				     struct ktermios *termios,
+				     const struct ktermios *old)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+	u32 lcr = 0;
+	unsigned long flags;
+	u32 baud, quot;
+
+	lcr = UART_LCR_WLEN(tty_get_char_size(termios->c_cflag));
+
+	if (termios->c_cflag & CSTOPB)
+		lcr |= LCR_NSB;
+	if (termios->c_cflag & PARENB)
+		lcr |= LCR_PBE;
+	if (!(termios->c_cflag & PARODD))
+		lcr |= LCR_EPE;
+	if (termios->c_cflag & CMSPAR)
+		lcr |= LCR_SPE;
+
+	baud = uart_get_baud_rate(port, termios, old, port->uartclk / 0xffff,
+				  port->uartclk / 11);
+
+	quot = ma35d1serial_get_divisor(port, baud);
+
+	/*
+	 * Ok, we're now changing the port state.  Do it with
+	 * interrupts disabled.
+	 */
+	spin_lock_irqsave(&up->port.lock, flags);
+
+	up->port.read_status_mask = FSR_RX_OVER_IF;
+	if (termios->c_iflag & INPCK)
+		up->port.read_status_mask |= FSR_FEF | FSR_PEF;
+	if (termios->c_iflag & (BRKINT | PARMRK))
+		up->port.read_status_mask |= FSR_BIF;
+
+	/*
+	 * Characteres to ignore
+	 */
+	up->port.ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		up->port.ignore_status_mask |= FSR_FEF | FSR_PEF;
+	if (termios->c_iflag & IGNBRK) {
+		up->port.ignore_status_mask |= FSR_BIF;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns too (for real raw support).
+		 */
+		if (termios->c_iflag & IGNPAR)
+			up->port.ignore_status_mask |= FSR_RX_OVER_IF;
+	}
+	if (termios->c_cflag & CRTSCTS)
+		up->mcr |= UART_MCR_AFE;
+	else
+		up->mcr &= ~UART_MCR_AFE;
+
+	uart_update_timeout(port, termios->c_cflag, baud);
+	ma35d1serial_set_mctrl(&up->port, up->port.mctrl);
+	serial_out(up, UART_REG_BAUD, quot | BAUD_MODE2);
+	serial_out(up, UART_REG_LCR, lcr);
+	spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static const char *ma35d1serial_type(struct uart_port *port)
+{
+	return "ma35d1-uart";
+}
+
+static void ma35d1serial_config_port(struct uart_port *port, int flags)
+{
+	/*
+	 * Driver core for serial ports forces a non-zero value for port type.
+	 * Write an arbitrary value here to accommodate the serial core driver,
+	 * as ID part of UAPI is redundant.
+	 */
+	port->type = 1;
+}
+
+static int ma35d1serial_verify_port(struct uart_port *port,
+				struct serial_struct *ser)
+{
+	if (port->type != PORT_UNKNOWN && ser->type != 1)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct uart_ops ma35d1serial_ops = {
+	.tx_empty     = ma35d1serial_tx_empty,
+	.set_mctrl    = ma35d1serial_set_mctrl,
+	.get_mctrl    = ma35d1serial_get_mctrl,
+	.stop_tx      = ma35d1serial_stop_tx,
+	.start_tx     = ma35d1serial_start_tx,
+	.stop_rx      = ma35d1serial_stop_rx,
+	.break_ctl    = ma35d1serial_break_ctl,
+	.startup      = ma35d1serial_startup,
+	.shutdown     = ma35d1serial_shutdown,
+	.set_termios  = ma35d1serial_set_termios,
+	.type         = ma35d1serial_type,
+	.config_port  = ma35d1serial_config_port,
+	.verify_port  = ma35d1serial_verify_port,
+};
+
+static const struct of_device_id ma35d1_serial_of_match[] = {
+	{ .compatible = "nuvoton,ma35d1-uart" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ma35d1_serial_of_match);
+
+#ifdef CONFIG_SERIAL_NUVOTON_MA35D1_CONSOLE
+
+static void wait_for_xmitr(struct uart_ma35d1_port *up)
+{
+	unsigned int tmout;
+
+	/* Wait up to 10ms for the character(s) to be sent. */
+	tmout = 10000;
+	while (--tmout) {
+		if (serial_in(up, UART_REG_FSR) & FSR_TX_EMPTY)
+			break;
+		udelay(1);
+	}
+}
+
+static void ma35d1serial_console_putchar(struct uart_port *port, unsigned char ch)
+{
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	wait_for_xmitr(up);
+	serial_out(up, UART_REG_THR, ch);
+}
+
+/*
+ *  Print a string to the serial port trying not to disturb
+ *  any possible real use of the port...
+ *
+ *  The console_lock must be held when we get here.
+ */
+static void ma35d1serial_console_write(struct console *co,
+				       const char *s, u32 count)
+{
+	struct uart_ma35d1_port *up = &ma35d1serial_ports[co->index];
+	unsigned long flags;
+	u32 ier;
+
+	local_irq_save(flags);
+
+	/*
+	 *  First save the IER then disable the interrupts
+	 */
+	ier = serial_in(up, UART_REG_IER);
+	serial_out(up, UART_REG_IER, 0);
+
+	uart_console_write(&up->port, s, count, ma35d1serial_console_putchar);
+
+	wait_for_xmitr(up);
+
+	serial_out(up, UART_REG_IER, ier);
+	local_irq_restore(flags);
+}
+
+static int __init ma35d1serial_console_setup(struct console *co,
+					     char *options)
+{
+	struct device_node *np = ma35d1serial_uart_nodes[co->index];
+	struct uart_ma35d1_port *p = &ma35d1serial_ports[co->index];
+	u32 val32[4];
+	struct uart_port *port;
+	int baud = 115200;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	if ((co->index < 0) || (co->index >= UART_NR)) {
+		pr_debug("Console Port%x out of range\n", co->index);
+		return -EINVAL;
+	}
+
+	if (of_property_read_u32_array(np, "reg", val32, 4) != 0)
+		return -EINVAL;
+	p->port.iobase = val32[1];
+	p->port.membase = ioremap(p->port.iobase, UART_REG_SIZE);
+	p->port.ops = &ma35d1serial_ops;
+	p->port.line = 0;
+	p->port.uartclk = UART_CONSOLE_CLK;
+
+	port = &ma35d1serial_ports[co->index].port;
+	return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+static struct console ma35d1serial_console = {
+	.name    = "ttyS",
+	.write   = ma35d1serial_console_write,
+	.device  = uart_console_device,
+	.setup   = ma35d1serial_console_setup,
+	.flags   = CON_PRINTBUFFER | CON_ENABLED,
+	.index   = -1,
+	.data    = &ma35d1serial_reg,
+};
+
+static void ma35d1serial_console_init_port(void)
+{
+	int i = 0;
+	struct device_node *np;
+
+	for_each_matching_node(np, ma35d1_serial_of_match) {
+		if (ma35d1serial_uart_nodes[i] == NULL) {
+			of_node_get(np);
+			ma35d1serial_uart_nodes[i] = np;
+			i++;
+			if (i == UART_NR)
+				break;
+		}
+	}
+}
+
+static int __init ma35d1serial_console_init(void)
+{
+	ma35d1serial_console_init_port();
+	register_console(&ma35d1serial_console);
+	return 0;
+}
+console_initcall(ma35d1serial_console_init);
+
+#define MA35D1SERIAL_CONSOLE    (&ma35d1serial_console)
+#else
+#define MA35D1SERIAL_CONSOLE    NULL
+#endif
+
+static struct uart_driver ma35d1serial_reg = {
+	.owner        = THIS_MODULE,
+	.driver_name  = "serial",
+	.dev_name     = "ttyS",
+	.major        = TTY_MAJOR,
+	.minor        = 64,
+	.cons         = MA35D1SERIAL_CONSOLE,
+	.nr           = UART_NR,
+};
+
+/*
+ * Register a set of serial devices attached to a platform device.
+ * The list is terminated with a zero flags entry, which means we expect
+ * all entries to have at least UPF_BOOT_AUTOCONF set.
+ */
+static int ma35d1serial_probe(struct platform_device *pdev)
+{
+	struct resource *res_mem;
+	struct uart_ma35d1_port *up;
+	int ret;
+	struct clk *clk;
+	int err;
+
+	if (pdev->dev.of_node) {
+		ret = of_alias_get_id(pdev->dev.of_node, "serial");
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n", ret);
+			return ret;
+		}
+	}
+	up = &ma35d1serial_ports[ret];
+	up->port.line = ret;
+	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res_mem)
+		return -ENODEV;
+
+	up->port.iobase = res_mem->start;
+	up->port.membase = ioremap(up->port.iobase, UART_REG_SIZE);
+	up->port.ops = &ma35d1serial_ops;
+
+	spin_lock_init(&up->port.lock);
+
+	clk = of_clk_get(pdev->dev.of_node, 0);
+	if (IS_ERR(clk)) {
+		err = PTR_ERR(clk);
+		dev_err(&pdev->dev, "failed to get core clk: %d\n", err);
+		return -ENOENT;
+	}
+	err = clk_prepare_enable(clk);
+	if (err)
+		return -ENOENT;
+
+	if (up->port.line != 0)
+		up->port.uartclk = clk_get_rate(clk);
+	up->port.irq = platform_get_irq(pdev, 0);
+	up->port.dev = &pdev->dev;
+	up->port.flags = UPF_BOOT_AUTOCONF;
+	ret = uart_add_one_port(&ma35d1serial_reg, &up->port);
+	platform_set_drvdata(pdev, up);
+	return 0;
+}
+
+/*
+ * Remove serial ports registered against a platform device.
+ */
+static int ma35d1serial_remove(struct platform_device *dev)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+
+	if (port) {
+		uart_remove_one_port(&ma35d1serial_reg, port);
+		free_irq(port->irq, port);
+	}
+	return 0;
+}
+
+static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
+{
+	int i;
+	struct uart_ma35d1_port *up;
+
+	if (dev->dev.of_node)
+		i = of_alias_get_id(dev->dev.of_node, "serial");
+	if (i < 0) {
+		dev_err(&dev->dev, "failed to get alias/pdev id, errno %d\n", i);
+		return i;
+	}
+	up = &ma35d1serial_ports[i];
+	if (i == 0) {
+		up->console_baud_rate = serial_in(up, UART_REG_BAUD);
+		up->console_line = serial_in(up, UART_REG_LCR);
+		up->console_int = serial_in(up, UART_REG_IER);
+	}
+	return 0;
+}
+
+static int ma35d1serial_resume(struct platform_device *dev)
+{
+	int i;
+	struct uart_ma35d1_port *up;
+
+	if (dev->dev.of_node)
+		i = of_alias_get_id(dev->dev.of_node, "serial");
+	if (i < 0) {
+		dev_err(&dev->dev, "failed to get alias/pdev id, errno %d\n", i);
+		return i;
+	}
+	up = &ma35d1serial_ports[i];
+	if (i == 0) {
+		serial_out(up, UART_REG_BAUD, up->console_baud_rate);
+		serial_out(up, UART_REG_LCR, up->console_line);
+		serial_out(up, UART_REG_IER, up->console_int);
+	}
+	return 0;
+}
+
+static struct platform_driver ma35d1serial_driver = {
+	.probe      = ma35d1serial_probe,
+	.remove     = ma35d1serial_remove,
+	.suspend    = ma35d1serial_suspend,
+	.resume     = ma35d1serial_resume,
+	.driver     = {
+		.name   = "ma35d1-uart",
+		.owner  = THIS_MODULE,
+		.of_match_table = of_match_ptr(ma35d1_serial_of_match),
+	},
+};
+
+static int __init ma35d1serial_init(void)
+{
+	int ret;
+
+	ret = uart_register_driver(&ma35d1serial_reg);
+	if (ret)
+		return ret;
+	ret = platform_driver_register(&ma35d1serial_driver);
+	if (ret)
+		uart_unregister_driver(&ma35d1serial_reg);
+	return ret;
+}
+
+static void __exit ma35d1serial_exit(void)
+{
+	platform_driver_unregister(&ma35d1serial_driver);
+	uart_unregister_driver(&ma35d1serial_reg);
+}
+
+module_init(ma35d1serial_init);
+module_exit(ma35d1serial_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MA35D1 serial driver");
+MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
+
-- 
2.34.1

[PATCH v6 12/12] MAINTAINERS: Add entry for NUVOTON MA35

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add entry for Nuvton ma35d1 maintainer and files.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
---
 MAINTAINERS | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 1dc8bd26b6cf..a3912717f1da 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2501,6 +2501,15 @@ F:	drivers/rtc/rtc-ab8500.c
 F:	drivers/rtc/rtc-pl031.c
 F:	drivers/soc/ux500/
 
+ARM/NUVOTON MA35 ARCHITECTURE
+M:	Jacky Huang <ychuang3@nuvoton.com>
+M:	Shan-Chun Hung <schung@nuvoton.com>
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:	Supported
+F:	Documentation/devicetree/bindings/*/*nuvoton*
+F:	arch/arm64/boot/dts/nuvoton/*ma35*
+K:	ma35d1
+
 ARM/NUVOTON NPCM ARCHITECTURE
 M:	Avi Fishman <avifishman70@gmail.com>
 M:	Tomer Maimon <tmaimon77@gmail.com>
-- 
2.34.1

Re: [PATCH v6 11/12] tty: serial: Add Nuvoton ma35d1 serial driver support

[Jiri Slaby]

On 28. 03. 23, 4:19, Jacky Huang wrote:
> +static void transmit_chars(struct uart_ma35d1_port *up)
> +{
> +	struct circ_buf *xmit = &up->port.state->xmit;
> +	int count;
> +	u8 ch;
> +
> +	if (uart_tx_stopped(&up->port)) {
> +		ma35d1serial_stop_tx(&up->port);
> +		return;
> +	}
> +	if (uart_circ_empty(xmit)) {
> +		__stop_tx(up);
> +		return;
> +	}

Why is this necessary?

> +	count = UART_FIFO_DEPTH - ((serial_in(up, UART_REG_FSR) & FSR_TXPTR_MSK) >> 16);
> +
> +	uart_port_tx_limited(&up->port, ch, count,
> +			     !(serial_in(up, UART_REG_FSR) & FSR_TX_FULL),
> +			     serial_out(up, UART_REG_THR, ch),
> +			     ({}));
> +
> +	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
> +		uart_write_wakeup(&up->port);
> +
> +	if (uart_circ_empty(xmit))
> +		__stop_tx(up);

uart_port_tx_limited() should take care about the above and this too, right?

> +}
...
> +static void receive_chars(struct uart_ma35d1_port *up)
> +{
> +	u8 flag;
> +	u32 fsr;
> +	unsigned int ch;

Shouldn't ch be u8 too?

> +	int max_count = 256;
> +
> +	fsr = serial_in(up, UART_REG_FSR);
> +	do {
> +		flag = TTY_NORMAL;
> +		up->port.icount.rx++;
> +
> +		if (unlikely(fsr & (FSR_BIF | FSR_FEF | FSR_PEF | FSR_RX_OVER_IF))) {
> +			if (fsr & FSR_BIF) {
> +				up->port.icount.brk++;
> +				if (uart_handle_break(&up->port))
> +					continue;
> +			}
> +			if (fsr & FSR_FEF)
> +				up->port.icount.frame++;
> +			if (fsr & FSR_PEF)
> +				up->port.icount.parity++;
> +			if (fsr & FSR_RX_OVER_IF)
> +				up->port.icount.overrun++;
> +
> +			serial_out(up, UART_REG_FSR, fsr &
> +				   (FSR_BIF | FSR_FEF | FSR_PEF | FSR_RX_OVER_IF));
> +
> +			if (fsr & FSR_BIF)
> +				flag = TTY_BREAK;
> +			else if (fsr & FSR_PEF)
> +				flag = TTY_PARITY;
> +			else if (fsr & FSR_FEF)
> +				flag = TTY_FRAME;
> +		}
> +
> +		ch = serial_in(up, UART_REG_RBR);
> +		if (uart_handle_sysrq_char(&up->port, ch))
> +			continue;
> +
> +		spin_lock(&up->port.lock);
> +		uart_insert_char(&up->port, fsr, FSR_RX_OVER_IF, ch, flag);
> +		spin_unlock(&up->port.lock);
> +
> +		fsr = serial_in(up, UART_REG_FSR);
> +	} while (!(fsr & FSR_RX_EMPTY) && (max_count-- > 0));
> +
> +	spin_lock(&up->port.lock);
> +	tty_flip_buffer_push(&up->port.state->port);
> +	spin_unlock(&up->port.lock);
> +}
...
> +static int ma35d1serial_remove(struct platform_device *dev)
> +{
> +	struct uart_port *port = platform_get_drvdata(dev);
> +
> +	if (port) {

Can this ever be NULL?

> +		uart_remove_one_port(&ma35d1serial_reg, port);
> +		free_irq(port->irq, port);
> +	}
> +	return 0;
> +}
> +
> +static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
> +{
> +	int i;
> +	struct uart_ma35d1_port *up;
> +
> +	if (dev->dev.of_node)
> +		i = of_alias_get_id(dev->dev.of_node, "serial");
> +	if (i < 0) {
> +		dev_err(&dev->dev, "failed to get alias/pdev id, errno %d\n", i);
> +		return i;
> +	}
> +	up = &ma35d1serial_ports[i];

platform_get_drvdata(dev) ?

> +	if (i == 0) {
> +		up->console_baud_rate = serial_in(up, UART_REG_BAUD);
> +		up->console_line = serial_in(up, UART_REG_LCR);
> +		up->console_int = serial_in(up, UART_REG_IER);
> +	}
> +	return 0;
> +}
> +
> +static int ma35d1serial_resume(struct platform_device *dev)
> +{
> +	int i;
> +	struct uart_ma35d1_port *up;
> +
> +	if (dev->dev.of_node)
> +		i = of_alias_get_id(dev->dev.of_node, "serial");
> +	if (i < 0) {
> +		dev_err(&dev->dev, "failed to get alias/pdev id, errno %d\n", i);
> +		return i;
> +	}
> +	up = &ma35d1serial_ports[i];
> +	if (i == 0) {
> +		serial_out(up, UART_REG_BAUD, up->console_baud_rate);
> +		serial_out(up, UART_REG_LCR, up->console_line);
> +		serial_out(up, UART_REG_IER, up->console_int);
> +	}
> +	return 0;
> +}

No uart_suspend_port()/uart_resume_port()? You don't wait for 
transmitter to be empty in suspend. You don't stop tx etc.

> +static struct platform_driver ma35d1serial_driver = {
> +	.probe      = ma35d1serial_probe,
> +	.remove     = ma35d1serial_remove,
> +	.suspend    = ma35d1serial_suspend,
> +	.resume     = ma35d1serial_resume,
> +	.driver     = {
> +		.name   = "ma35d1-uart",
> +		.owner  = THIS_MODULE,
> +		.of_match_table = of_match_ptr(ma35d1_serial_of_match),
> +	},
> +};
> +
> +static int __init ma35d1serial_init(void)
> +{
> +	int ret;
> +
> +	ret = uart_register_driver(&ma35d1serial_reg);
> +	if (ret)
> +		return ret;
> +	ret = platform_driver_register(&ma35d1serial_driver);
> +	if (ret)
> +		uart_unregister_driver(&ma35d1serial_reg);
> +	return ret;
> +}
> +
> +static void __exit ma35d1serial_exit(void)
> +{
> +	platform_driver_unregister(&ma35d1serial_driver);
> +	uart_unregister_driver(&ma35d1serial_reg);
> +}
> +
> +module_init(ma35d1serial_init);
> +module_exit(ma35d1serial_exit);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("MA35D1 serial driver");


> +MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);

Why is this needed? How are other platform drivers autoloaded?

thanks,
-- 
js
suse labs

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[kernel test robot]

Hi Jacky,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on clk/clk-next linus/master pza/reset/next v6.3-rc4 next-20230328]
[cannot apply to pza/imx-drm/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jacky-Huang/arm64-Kconfig-platforms-Add-config-for-Nuvoton-MA35-platform/20230328-102245
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20230328021912.177301-7-ychuang570808%40gmail.com
patch subject: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform
reproduce:
        # https://github.com/intel-lab-lkp/linux/commit/d023e63cdc203398c5db3c81ca76d34d22e23fe5
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jacky-Huang/arm64-Kconfig-platforms-Add-config-for-Nuvoton-MA35-platform/20230328-102245
        git checkout d023e63cdc203398c5db3c81ca76d34d22e23fe5
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        make htmldocs

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303282310.bOWEkwv1-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> Warning: MAINTAINERS references a file that doesn't exist: Documentation/devicetree/bindings/arm/npcm/*

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

Re: [PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Stephen Boyd]

Quoting Jacky Huang (2023-03-27 19:19:04)
> +description:
> +  The system reset controller can be used to reset various peripheral
> +  controllers in MA35D1 SoC.
> +
> +properties:
> +  compatible:
> +    const: nuvoton,ma35d1-reset
> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  # system reset controller node:
> +  - |
> +
> +    system-management@40460000 {
> +        compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
> +        reg = <0x40460000 0x200>;
> +
> +        reset-controller {
> +            compatible = "nuvoton,ma35d1-reset";
> +            #reset-cells = <1>;
> +        };

This is prescribing driver details to the system-management node. The
reset-controller node should be removed, the #reset-cells moved up one
level, and the "nuvoton,ma35d1-sys" should match a driver that registers
an auxiliary device for reset functionality. Is anything besides child
nodes like 'reset-controller' using the syscon@40460000?

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Stephen Boyd]

Quoting Jacky Huang (2023-03-27 19:19:08)
> diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
> new file mode 100644
> index 000000000000..0740b0b218a7
> --- /dev/null
> +++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
> @@ -0,0 +1,231 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2023 Nuvoton Technology Corp.
> + * Author: Shan-Chun Hung <schung@nuvoton.com>
> + *         Jacky huang <ychuang3@nuvoton.com>
> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
> +#include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
> +
> +/ {
> +       compatible = "nuvoton,ma35d1";
> +       interrupt-parent = <&gic>;
> +       #address-cells = <2>;
> +       #size-cells = <2>;
> +
> +       cpus {
> +               #address-cells = <2>;
> +               #size-cells = <0>;
> +
> +               cpu0: cpu@0 {
> +                       device_type = "cpu";
> +                       compatible = "arm,cortex-a35";
> +                       reg = <0x0 0x0>;
> +                       enable-method = "psci";
> +                       next-level-cache = <&L2_0>;
> +               };
> +
> +               cpu1: cpu@1 {
> +                       device_type = "cpu";
> +                       compatible = "arm,cortex-a35";
> +                       reg = <0x0 0x1>;
> +                       enable-method = "psci";
> +                       next-level-cache = <&L2_0>;
> +               };
> +
> +               L2_0: l2-cache0 {

Just l2-cache for the node name. Doesn't it go under the cpu0 node as
well?

> +                       compatible = "cache";
> +                       cache-level = <2>;
> +               };
> +       };
> +
> +       psci {
> +               compatible = "arm,psci-0.2";
> +               method = "smc";
> +       };
> +
> +       timer {
> +               compatible = "arm,armv8-timer";
> +               interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) |
> +                             IRQ_TYPE_LEVEL_LOW)>, /* Physical Secure */
> +                            <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) |
> +                             IRQ_TYPE_LEVEL_LOW)>, /* Physical Non-Secure */
> +                            <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) |
> +                             IRQ_TYPE_LEVEL_LOW)>, /* Virtual */
> +                            <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) |
> +                             IRQ_TYPE_LEVEL_LOW)>; /* Hypervisor */
> +               clock-frequency = <12000000>;

Remove this property. The frequency should be read by the driver.

> +               interrupt-parent = <&gic>;
> +       };

Please create an 'soc' node for the SoC to hold all the nodes that have
a reg property.

> +
> +       sys: system-management@40460000 {
> +               compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
> +               reg = <0x0 0x40460000 0x0 0x200>;
> +
> +               reset: reset-controller {
> +                       compatible = "nuvoton,ma35d1-reset";
> +                       #reset-cells = <1>;
> +               };
> +       };
> +
> +       clk: clock-controller@40460200 {
> +               compatible = "nuvoton,ma35d1-clk", "syscon";
> +               reg = <0x00000000 0x40460200 0x0 0x100>;
> +               #clock-cells = <1>;
> +               clocks = <&clk_hxt>;
> +               nuvoton,sys = <&sys>;
> +       };

It looks like the device at 40460000 is a reset and clock controller.
Just make it one node and register the clk or reset device as an
auxiliary device.

> +
> +       gic: interrupt-controller@50801000 {
> +               compatible = "arm,gic-400";
> +               reg =   <0x0 0x50801000 0 0x1000>, /* GICD */
> +                       <0x0 0x50802000 0 0x2000>, /* GICC */
> +                       <0x0 0x50804000 0 0x2000>, /* GICH */
> +                       <0x0 0x50806000 0 0x2000>; /* GICV */
> +               #interrupt-cells = <3>;
> +               interrupt-parent = <&gic>;
> +               interrupt-controller;
> +               interrupts = <GIC_PPI 9 (GIC_CPU_MASK_RAW(0x13) |
> +                             IRQ_TYPE_LEVEL_HIGH)>;
> +       };
> +
> +       uart0:serial@40700000 {

Add a space after :

> +               compatible = "nuvoton,ma35d1-uart";
> +               reg = <0x0 0x40700000 0x0 0x100>;
> +               interrupts = <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
> +               clocks = <&clk UART0_GATE>;
> +               status = "disabled";
> +       };

Re: [PATCH v6 09/12] clk: nuvoton: Add clock driver for ma35d1 clock controller

[Stephen Boyd]

Quoting Jacky Huang (2023-03-27 19:19:09)
> diff --git a/drivers/clk/nuvoton/Kconfig b/drivers/clk/nuvoton/Kconfig
> new file mode 100644
> index 000000000000..c1324efedcb9
> --- /dev/null
> +++ b/drivers/clk/nuvoton/Kconfig
> @@ -0,0 +1,19 @@
> +# SPDX-License-Identifier: GPL-2.0
> +# common clock support for Nuvoton SoC family.
> +
> +config COMMON_CLK_NUVOTON
> +       bool "Nuvoton clock controller common support"
> +       depends on ARCH_NUVOTON

Add || COMPILE_TEST

> +       default ARCH_NUVOTON
> +       help
> +         Say y here to enable common clock controller for Nuvoton platforms.
> +
> +if COMMON_CLK_NUVOTON

Add a newline here.

> +config CLK_MA35D1
> +       bool "Nuvoton MA35D1 clock controller support"
> +       depends on ARM64 || COMPILE_TEST

Drop this

> +       default y

And this.

> +       help
> +         Build the driver for MA35D1 Clock Driver.

This says driver twice. "Build the clk driver for MA35D1 SoCs"?

> +
> +endif
> diff --git a/drivers/clk/nuvoton/clk-ma35d1-divider.c b/drivers/clk/nuvoton/clk-ma35d1-divider.c
> new file mode 100644
> index 000000000000..340a889a1417
> --- /dev/null
> +++ b/drivers/clk/nuvoton/clk-ma35d1-divider.c
> @@ -0,0 +1,140 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2023 Nuvoton Technology Corp.
> + * Author: Chi-Fang Li <cfli0@nuvoton.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/device.h>
> +#include <linux/regmap.h>
> +#include <linux/spinlock.h>
> +
> +#include "clk-ma35d1.h"
> +
> +#define clk_div_mask(width)    ((1 << (width)) - 1)

clk-provider.h defines this already, use that?

> +
> +struct ma35d1_adc_clk_div {
> +       struct clk_hw hw;
> +       void __iomem *reg;
> +       u8 shift;
> +       u8 width;
> +       u32 mask;
> +       const struct clk_div_table *table;
> +       /* protects concurrent access to clock divider registers */
> +       spinlock_t *lock;
> +};
> +
> +static inline struct ma35d1_adc_clk_div *to_ma35d1_adc_clk_div(struct clk_hw *_hw)
> +{
> +       return container_of(_hw, struct ma35d1_adc_clk_div, hw);
> +}
> +
> +static inline unsigned long ma35d1_clkdiv_recalc_rate(struct clk_hw *hw,
> +                                                     unsigned long parent_rate)
> +{
> +       unsigned int val;
> +       struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
> +
> +       val = readl_relaxed(dclk->reg) >> dclk->shift;
> +       val &= clk_div_mask(dclk->width);
> +       val += 1;
> +       return divider_recalc_rate(hw, parent_rate, val, dclk->table,
> +                                  CLK_DIVIDER_ROUND_CLOSEST, dclk->width);
> +}
> +
> +static inline long ma35d1_clkdiv_round_rate(struct clk_hw *hw,
> +                                           unsigned long rate,
> +                                           unsigned long *prate)
> +{
> +       struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
> +
> +       return divider_round_rate(hw, rate, prate, dclk->table,
> +                                 dclk->width, CLK_DIVIDER_ROUND_CLOSEST);
> +}
> +
> +static inline int ma35d1_clkdiv_set_rate(struct clk_hw *hw,
> +                                        unsigned long rate,
> +                                        unsigned long parent_rate)
> +{
> +       int value;
> +       unsigned long flags = 0;
> +       u32 data;
> +       struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
> +
> +       value = divider_get_val(rate, parent_rate, dclk->table,
> +                               dclk->width, CLK_DIVIDER_ROUND_CLOSEST);
> +
> +       if (dclk->lock)
> +               spin_lock_irqsave(dclk->lock, flags);

Can you just always lock? That makes the conditional locking go away.

> +
> +       data = readl_relaxed(dclk->reg);
> +       data &= ~(clk_div_mask(dclk->width) << dclk->shift);
> +       data |= (value - 1) << dclk->shift;
> +       data |= dclk->mask;
> +
> +       writel_relaxed(data, dclk->reg);
> +
> +       if (dclk->lock)
> +               spin_unlock_irqrestore(dclk->lock, flags);
> +
> +       return 0;
> +}
> +
> +static const struct clk_ops ma35d1_adc_clkdiv_ops = {
> +       .recalc_rate = ma35d1_clkdiv_recalc_rate,
> +       .round_rate = ma35d1_clkdiv_round_rate,
> +       .set_rate = ma35d1_clkdiv_set_rate,
> +};
> +
> +struct clk_hw *ma35d1_reg_adc_clkdiv(struct device *dev, const char *name,
> +                                    const char *parent_name,
> +                                    spinlock_t *lock,
> +                                    unsigned long flags, void __iomem *reg,
> +                                    u8 shift, u8 width, u32 mask_bit)
> +{
> +       struct ma35d1_adc_clk_div *div;
> +       struct clk_init_data init;
> +       struct clk_div_table *table;
> +       u32 max_div, min_div;
> +       struct clk_hw *hw;
> +       int ret;
> +       int i;
> +
> +       div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
> +       if (!div)
> +               return ERR_PTR(-ENOMEM);
> +
> +       max_div = clk_div_mask(width) + 1;
> +       min_div = 1;
> +
> +       table = devm_kcalloc(dev, max_div + 1, sizeof(*table), GFP_KERNEL);
> +       if (!table)
> +               return ERR_PTR(-ENOMEM);
> +
> +       for (i = 0; i < max_div; i++) {
> +               table[i].val = (min_div + i);

Drop useless parenthesis.

> +               table[i].div = 2 * table[i].val;
> +       }
> +       table[max_div].val = 0;
> +       table[max_div].div = 0;
> +
> +       init.name = name;
> +       init.ops = &ma35d1_adc_clkdiv_ops;
> +       init.flags |= flags;
> +       init.parent_names = parent_name ? &parent_name : NULL;
> +       init.num_parents = parent_name ? 1 : 0;
> +
> +       div->reg = reg;
> +       div->shift = shift;
> +       div->width = width;
> +       div->mask = mask_bit ? BIT(mask_bit) : 0;
> +       div->lock = lock;
> +       div->hw.init = &init;
> +       div->table = table;
> +
> +       hw = &div->hw;
> +       ret = devm_clk_hw_register(dev, hw);
> +       if (ret < 0)

Use if (ret) instead.

> +               return ERR_PTR(ret);
> +       return hw;
> +}
> diff --git a/drivers/clk/nuvoton/clk-ma35d1-pll.c b/drivers/clk/nuvoton/clk-ma35d1-pll.c
> new file mode 100644
> index 000000000000..b36fbda4fa0a
> --- /dev/null
> +++ b/drivers/clk/nuvoton/clk-ma35d1-pll.c
> @@ -0,0 +1,350 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2023 Nuvoton Technology Corp.
> + * Author: Chi-Fang Li <cfli0@nuvoton.com>
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/clk-provider.h>
> +#include <linux/slab.h>
> +#include <linux/regmap.h>
> +
> +#include "clk-ma35d1.h"
> +
> +#define REG_SYS_RLKTZNS                0x1a4 /* Register Lock Control */
> +
> +struct ma35d1_clk_pll {
> +       struct clk_hw hw;
> +       u8 type;
> +       u8 mode;
> +       unsigned long rate;
> +       void __iomem *ctl0_base;

This needs an include for __iomem define. Just include kernel.h for now.

> +       void __iomem *ctl1_base;
> +       void __iomem *ctl2_base;
> +       struct regmap *regmap;
> +};
> +
> +static inline struct ma35d1_clk_pll *to_ma35d1_clk_pll(struct clk_hw *_hw)
> +{
> +       return container_of(_hw, struct ma35d1_clk_pll, hw);

Missing include as well.

> +}
> +
> +static void ma35d1_unlock_regs(struct ma35d1_clk_pll *pll)
> +{
> +       int ret;
> +
> +       do {
> +               regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x59);
> +               regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x16);
> +               regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x88);
> +               regmap_read(pll->regmap, REG_SYS_RLKTZNS, &ret);
> +       } while (ret == 0);

Any sort of timeout?

> +}
> +
> +static void ma35d1_lock_regs(struct ma35d1_clk_pll *pll)
> +{
> +       regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x0);
> +}
> +
> +static unsigned long ma35d1_calc_smic_pll_freq(u32 pll0_ctl0,
> +                                              unsigned long parent_rate)
> +{
> +       u32 m, n, p, outdiv;
> +       u64 pll_freq;
> +       u32 clk_div_table[] = { 1, 2, 4, 8 };

const

> +
> +       if (pll0_ctl0 & SPLL0_CTL0_BP)
> +               return parent_rate;
> +
> +       n = FIELD_GET(SPLL0_CTL0_FBDIV, pll0_ctl0);
> +       m = FIELD_GET(SPLL0_CTL0_INDIV, pll0_ctl0);
> +       p = FIELD_GET(SPLL0_CTL0_OUTDIV, pll0_ctl0);
> +       outdiv = clk_div_table[p];
> +       pll_freq = (u64)parent_rate * n;
> +       do_div(pll_freq, m * outdiv);
> +       return (unsigned long)pll_freq;

Remove useless cast.

> +}
> +
> +static unsigned long ma35d1_calc_pll_freq(u8 mode, u32 *reg_ctl,
> +                                         unsigned long parent_rate)
> +{
> +       u32 m, n, p;
> +       u64 pll_freq, x;
> +
> +       if (reg_ctl[1] & PLL_CTL1_BP)
> +               return parent_rate;
> +
> +       if (mode == PLL_MODE_INT) {
> +               n = FIELD_GET(PLL_CTL0_FBDIV, reg_ctl[0]);
> +               m = FIELD_GET(PLL_CTL0_INDIV, reg_ctl[0]);
> +               p = FIELD_GET(PLL_CTL1_OUTDIV, reg_ctl[1]);
> +               pll_freq = (u64)parent_rate * n;
> +               do_div(pll_freq, m * p);
> +       } else {
> +               n = FIELD_GET(PLL_CTL0_FBDIV, reg_ctl[0]);
> +               m = FIELD_GET(PLL_CTL0_INDIV, reg_ctl[0]);
> +               p = FIELD_GET(PLL_CTL1_OUTDIV, reg_ctl[1]);

The n, m, p are the same, so pull them out of the if-else to deduplicate.

> +               x = FIELD_GET(PLL_CTL1_FRAC, reg_ctl[1]);
> +               /* 2 decimal places floating to integer (ex. 1.23 to 123) */
> +               n = n * 100 + ((x * 100) / FIELD_MAX(PLL_CTL1_FRAC));

Is this mult_frac()?

> +               pll_freq = ((u64)parent_rate * n) / 100 / m / p;
> +       }

Add a newline

> +       return (unsigned long)pll_freq;

Remove useless cast.

> +}
> +
> +static int ma35d1_pll_find_closest(struct ma35d1_clk_pll *pll,
> +                                  unsigned long rate,
> +                                  unsigned long parent_rate,
> +                                  u32 *reg_ctl, unsigned long *freq)
> +{
> +       int p, m, n;
> +       int fbdiv_min, fbdiv_max;
> +       unsigned long diff = 0xffffffff;
> +
> +       *freq = 0;
> +       if ((rate < PLL_FCLKO_MIN_FREQ) || (rate > PLL_FCLKO_MAX_FREQ))
> +               return -EINVAL;
> +
> +       if (pll->mode == PLL_MODE_INT) {
> +               fbdiv_min = FBDIV_MIN;
> +               fbdiv_max = FBDIV_MAX;
> +       } else {
> +               fbdiv_min = FBDIV_FRAC_MIN;
> +               fbdiv_max = FBDIV_FRAC_MAX;
> +       }
> +
> +       for (m = INDIV_MIN; m <= INDIV_MAX; m++) {
> +               for (n = fbdiv_min; n <= fbdiv_max; n++) {
> +                       for (p = OUTDIV_MIN; p <= OUTDIV_MAX; p++) {
> +                               unsigned long tmp, fout;
> +                               u64 fclk;
> +
> +                               tmp = parent_rate / m;
> +                               if (tmp < PLL_FREF_M_MIN_FREQ ||
> +                                   tmp > PLL_FREF_M_MAX_FREQ)
> +                                       continue; /* constrain */
> +
> +                               fclk = (u64)parent_rate * n / m;
> +                               /* for 2 decimal places */
> +                               if (pll->mode != PLL_MODE_INT)
> +                                       fclk /= 100;
> +
> +                               if (fclk < PLL_FCLK_MIN_FREQ ||
> +                                   fclk > PLL_FCLK_MAX_FREQ)
> +                                       continue; /* constrain */
> +
> +                               fout = (unsigned long)(fclk / p);
> +                               if (fout < PLL_FCLKO_MIN_FREQ ||
> +                                   fout > PLL_FCLKO_MAX_FREQ)
> +                                       continue; /* constrain */
> +
> +                               if (abs(rate - fout) < diff) {
> +                                       reg_ctl[0] = FIELD_PREP(PLL_CTL0_INDIV, m) |
> +                                                    FIELD_PREP(PLL_CTL0_FBDIV, n);
> +                                       reg_ctl[1] = FIELD_PREP(PLL_CTL1_OUTDIV, p);
> +                                       *freq = fout;
> +                                       diff = abs(rate - fout);
> +                                       if (diff == 0)
> +                                               break;
> +                               }
> +                       }
> +               }
> +       }
> +       if (*freq == 0)
> +               return -EINVAL; /* cannot find even one valid setting */
> +       return 0;
> +}
> +
> +static int ma35d1_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> +                                  unsigned long parent_rate)
> +{
> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
> +       u32 reg_ctl[3] = { 0 };
> +       unsigned long pll_freq;
> +       int ret;
> +
> +       if ((parent_rate < PLL_FREF_MIN_FREQ) ||
> +           (parent_rate > PLL_FREF_MAX_FREQ))

Remove useless parenthesis.

> +               return -EINVAL;
> +
> +       if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {

Remove useless parenthesis.

> +               pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
> +               return -EACCES;
> +       }
> +
> +       ret = ma35d1_pll_find_closest(pll, rate, parent_rate, reg_ctl, &pll_freq);
> +       if (ret != 0)
> +               return ret;
> +       pll->rate = pll_freq;
> +
> +       switch (pll->mode) {
> +       case PLL_MODE_INT:
> +               reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_INT);
> +               break;
> +       case PLL_MODE_FRAC:
> +               reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_FRAC);
> +               break;
> +       case PLL_MODE_SS:
> +               reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_SS) |
> +                             FIELD_PREP(PLL_CTL0_SSRATE, PLL_SS_RATE);
> +               reg_ctl[2] = FIELD_PREP(PLL_CTL2_SLOPE, PLL_SLOPE);
> +               break;
> +       }
> +       reg_ctl[1] |= PLL_CTL1_PD;
> +
> +       ma35d1_unlock_regs(pll);
> +       writel_relaxed(reg_ctl[0], pll->ctl0_base);
> +       writel_relaxed(reg_ctl[1], pll->ctl1_base);
> +       writel_relaxed(reg_ctl[2], pll->ctl2_base);
> +       ma35d1_lock_regs(pll);
> +       return 0;
> +}
> +
> +static unsigned long ma35d1_clk_pll_recalc_rate(struct clk_hw *hw,
> +                                               unsigned long parent_rate)
> +{
> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
> +       u32 reg_ctl[3];
> +       unsigned long pll_freq;
> +
> +       if ((parent_rate < PLL_FREF_MIN_FREQ) || (parent_rate > PLL_FREF_MAX_FREQ))

Remove useless parenthesis.

> +               return 0;
> +
> +       switch (pll->type) {
> +       case MA35D1_CAPLL:
> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
> +               pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], parent_rate);

return?

> +               break;
> +       case MA35D1_DDRPLL:
> +       case MA35D1_APLL:
> +       case MA35D1_EPLL:
> +       case MA35D1_VPLL:
> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
> +               reg_ctl[1] = readl_relaxed(pll->ctl1_base);
> +               pll_freq = ma35d1_calc_pll_freq(pll->mode, reg_ctl, parent_rate);

return?

> +               break;
> +       }
> +       return pll_freq;

return 0?

> +}
> +
> +static long ma35d1_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> +                                     unsigned long *parent_rate)
> +{
> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
> +       u32 reg_ctl[3] = { 0 };
> +       unsigned long pll_freq;
> +       long ret;
> +
> +       if (*parent_rate < PLL_FREF_MIN_FREQ || *parent_rate > PLL_FREF_MAX_FREQ)
> +               return -EINVAL;
> +
> +       ret = ma35d1_pll_find_closest(pll, rate, *parent_rate, reg_ctl, &pll_freq);
> +       if (ret != 0)
> +               return ret;
> +
> +       switch (pll->type) {
> +       case MA35D1_CAPLL:
> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
> +               pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], *parent_rate);

return?

> +               break;
> +       case MA35D1_DDRPLL:
> +       case MA35D1_APLL:
> +       case MA35D1_EPLL:
> +       case MA35D1_VPLL:
> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
> +               reg_ctl[1] = readl_relaxed(pll->ctl1_base);
> +               pll_freq = ma35d1_calc_pll_freq(pll->mode, reg_ctl, *parent_rate);

return?

> +               break;
> +       }
> +       return pll_freq;

return 0?

> +}
> +
> +static int ma35d1_clk_pll_is_prepared(struct clk_hw *hw)
> +{
> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
> +       u32 val = readl_relaxed(pll->ctl1_base);
> +
> +       return val & PLL_CTL1_PD ? 0 : 1;
> +}
> +
> +static int ma35d1_clk_pll_prepare(struct clk_hw *hw)
> +{
> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
> +       u32 val;
> +
> +       if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {

Drop useless parenthesis.

> +               pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
> +               return -EACCES;
> +       }
> +
> +       ma35d1_unlock_regs(pll);
> +       val = readl_relaxed(pll->ctl1_base);
> +       val &= ~PLL_CTL1_PD;
> +       writel_relaxed(val, pll->ctl1_base);
> +       ma35d1_lock_regs(pll);
> +       return 0;
> +}
> +
> +static void ma35d1_clk_pll_unprepare(struct clk_hw *hw)
> +{
> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
> +       u32 val;
> +
> +       if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {

Drop useless parenthesis.

> +               pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");

These read-only checks should be removed and different clk_ops should be
assigned for the read-only type of clks.

> +       } else {
> +               val = readl_relaxed(pll->ctl1_base);
> +               val |= PLL_CTL1_PD;
> +               writel_relaxed(val, pll->ctl1_base);
> +       }
> +}
> +
> +static const struct clk_ops ma35d1_clk_pll_ops = {
> +       .is_prepared = ma35d1_clk_pll_is_prepared,
> +       .prepare = ma35d1_clk_pll_prepare,
> +       .unprepare = ma35d1_clk_pll_unprepare,
> +       .set_rate = ma35d1_clk_pll_set_rate,
> +       .recalc_rate = ma35d1_clk_pll_recalc_rate,
> +       .round_rate = ma35d1_clk_pll_round_rate,
> +};
> +
> +struct clk_hw *ma35d1_reg_clk_pll(enum ma35d1_pll_type type,

Pass a device here.

> +                                 u8 u8mode, const char *name,
> +                                 const char *parent,
> +                                 unsigned long targetFreq,
> +                                 void __iomem *base,
> +                                 struct regmap *regmap)
> +{
> +       struct ma35d1_clk_pll *pll;
> +       struct clk_hw *hw;
> +       struct clk_init_data init;

init = {};

> +       int ret;
> +
> +       pll = kmalloc(sizeof(*pll), GFP_KERNEL);

Just use kzalloc(). This isn't a hot path.

> +       if (!pll)
> +               return ERR_PTR(-ENOMEM);
> +
> +       pll->type = type;
> +       pll->mode = u8mode;
> +       pll->rate = targetFreq;
> +       pll->ctl0_base = base + REG_PLL_CTL0_OFFSET;
> +       pll->ctl1_base = base + REG_PLL_CTL1_OFFSET;
> +       pll->ctl2_base = base + REG_PLL_CTL2_OFFSET;
> +       pll->regmap = regmap;
> +
> +       init.name = name;
> +       init.flags = 0;
> +       init.parent_names = &parent;
> +       init.num_parents = 1;
> +       init.ops = &ma35d1_clk_pll_ops;
> +       pll->hw.init = &init;
> +       hw = &pll->hw;
> +
> +       ret = clk_hw_register(NULL, hw);

Use devm_

> +       if (ret) {
> +               pr_err("failed to register vsi-pll clock!!!\n");

I'm going to put a dev_err_probe() into clk registration code. Remove
this printk.

> +               kfree(pll);
> +               return ERR_PTR(ret);
> +       }
> +       return hw;
> +}
> diff --git a/drivers/clk/nuvoton/clk-ma35d1.c b/drivers/clk/nuvoton/clk-ma35d1.c
> new file mode 100644
> index 000000000000..e4d3ced396a3
> --- /dev/null
> +++ b/drivers/clk/nuvoton/clk-ma35d1.c
> @@ -0,0 +1,963 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2023 Nuvoton Technology Corp.
> + * Author: Chi-Fang Li <cfli0@nuvoton.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/platform_device.h>
> +#include <linux/spinlock.h>
> +#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
> +
> +#include "clk-ma35d1.h"
> +
> +static DEFINE_SPINLOCK(ma35d1_lock);
> +
> +static const char *const ca35clk_sel_clks[] = {

Use clk_parent_data instead.

> +       "hxt", "capll", "ddrpll", "dummy"
> +};
> +
[...]
> +
> +static inline struct clk_hw *ma35d1_clk_fixed(const char *name, int rate)
> +{
> +       return clk_hw_register_fixed_rate(NULL, name, NULL, 0, rate);
> +}
> +
> +static inline struct clk_hw *ma35d1_clk_mux(const char *name,
> +                                           void __iomem *reg,
> +                                           u8 shift, u8 width,
> +                                           const char *const *parents,
> +                                           int num_parents)
> +{
> +       return clk_hw_register_mux(NULL, name, parents, num_parents,
> +                                  CLK_SET_RATE_NO_REPARENT, reg, shift,
> +                                  width, 0, &ma35d1_lock);
> +}
> +
> +static inline struct clk_hw *ma35d1_clk_divider(const char *name,
> +                                               const char *parent,
> +                                               void __iomem *reg, u8 shift,
> +                                               u8 width)
> +{
> +       return clk_hw_register_divider(NULL, name, parent, CLK_SET_RATE_PARENT,
> +                                      reg, shift, width, 0, &ma35d1_lock);
> +}
> +
> +static inline struct clk_hw *ma35d1_clk_divider_pow2(const char *name,
> +                                                    const char *parent,
> +                                                    void __iomem *reg,
> +                                                    u8 shift, u8 width)
> +{
> +       return clk_hw_register_divider(NULL, name, parent,
> +                                      CLK_DIVIDER_POWER_OF_TWO, reg, shift,
> +                                      width, 0, &ma35d1_lock);
> +}
> +
> +static inline struct clk_hw *ma35d1_clk_divider_table(const char *name,
> +                                       const char *parent,
> +                                       void __iomem *reg,
> +                                       u8 shift, u8 width,
> +                                       const struct clk_div_table *table)
> +{
> +       return clk_hw_register_divider_table(NULL, name, parent, 0,
> +                                            reg, shift, width, 0, table,
> +                                            &ma35d1_lock);
> +}
> +
> +static inline struct clk_hw *ma35d1_clk_fixed_factor(const char *name,
> +                                                    const char *parent,
> +                                                    unsigned int mult,
> +                                                    unsigned int div)
> +{
> +       return clk_hw_register_fixed_factor(NULL, name, parent,
> +                                           CLK_SET_RATE_PARENT, mult, div);
> +}
> +
> +static inline struct clk_hw *ma35d1_clk_gate(const char *name,
> +                                            const char *parent,
> +                                            void __iomem *reg, u8 shift)
> +{
> +       return clk_hw_register_gate(NULL, name, parent, CLK_SET_RATE_PARENT,
> +                                   reg, shift, 0, &ma35d1_lock);
> +}

These need to use devm_ to unregister on failure.

> +
> +static int ma35d1_get_pll_setting(struct device_node *clk_node,
> +                                 u32 *pllmode, u32 *pllfreq)
> +{
> +       const char *of_str;
> +       int i;
> +
> +       for (i = 0; i < PLL_MAX_NUM; i++) {
> +               if (of_property_read_string_index(clk_node, "nuvoton,pll-mode", i, &of_str))
> +                       return -EINVAL;
> +               if (!strcmp(of_str, "integer"))
> +                       pllmode[i] = PLL_MODE_INT;
> +               else if (!strcmp(of_str, "fractional"))
> +                       pllmode[i] = PLL_MODE_FRAC;
> +               else if (!strcmp(of_str, "spread-spectrum"))
> +                       pllmode[i] = PLL_MODE_SS;
> +               else
> +                       return -EINVAL;
> +       }
> +       return of_property_read_u32_array(clk_node, "assigned-clock-rates",

The clk framework looks at this property. Why is the driver looking at
it too?

> +                                         pllfreq, PLL_MAX_NUM);
> +}
> +

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

Dear Stephen,


Thanks for your advice.


On 2023/3/29 上午 01:57, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-27 19:19:08)
>> diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>> new file mode 100644
>> index 000000000000..0740b0b218a7
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>> @@ -0,0 +1,231 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2023 Nuvoton Technology Corp.
>> + * Author: Shan-Chun Hung <schung@nuvoton.com>
>> + *         Jacky huang <ychuang3@nuvoton.com>
>> + */
>> +
>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>> +#include <dt-bindings/input/input.h>
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
>> +#include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
>> +
>> +/ {
>> +       compatible = "nuvoton,ma35d1";
>> +       interrupt-parent = <&gic>;
>> +       #address-cells = <2>;
>> +       #size-cells = <2>;
>> +
>> +       cpus {
>> +               #address-cells = <2>;
>> +               #size-cells = <0>;
>> +
>> +               cpu0: cpu@0 {
>> +                       device_type = "cpu";
>> +                       compatible = "arm,cortex-a35";
>> +                       reg = <0x0 0x0>;
>> +                       enable-method = "psci";
>> +                       next-level-cache = <&L2_0>;
>> +               };
>> +
>> +               cpu1: cpu@1 {
>> +                       device_type = "cpu";
>> +                       compatible = "arm,cortex-a35";
>> +                       reg = <0x0 0x1>;
>> +                       enable-method = "psci";
>> +                       next-level-cache = <&L2_0>;
>> +               };
>> +
>> +               L2_0: l2-cache0 {
> Just l2-cache for the node name. Doesn't it go under the cpu0 node as
> well?

This describes the level-2 cache which is external to and shared by cpu0 
& cpu1.
And only level-1 cache is inside of CPU core.
L2_0 is must, because both cpu0 and cpu1 has a next-level-cache = 
<&L2_0> property.

Many identical example of l2-cache node can be found in arm64 dts, such 
as k3-arm642.dtsi,
rk3328.dtsi, mt8195.dtsi, etc. Here is just a copy of similar arm64 
multi-core SoCs.

So we would like to keep this unchanged. Is it OK for you? Thanks.


>> +                       compatible = "cache";
>> +                       cache-level = <2>;
>> +               };
>> +       };
>> +
>> +       psci {
>> +               compatible = "arm,psci-0.2";
>> +               method = "smc";
>> +       };
>> +
>> +       timer {
>> +               compatible = "arm,armv8-timer";
>> +               interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) |
>> +                             IRQ_TYPE_LEVEL_LOW)>, /* Physical Secure */
>> +                            <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) |
>> +                             IRQ_TYPE_LEVEL_LOW)>, /* Physical Non-Secure */
>> +                            <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) |
>> +                             IRQ_TYPE_LEVEL_LOW)>, /* Virtual */
>> +                            <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) |
>> +                             IRQ_TYPE_LEVEL_LOW)>; /* Hypervisor */
>> +               clock-frequency = <12000000>;
> Remove this property. The frequency should be read by the driver.

I will remove it.

>> +               interrupt-parent = <&gic>;
>> +       };
> Please create an 'soc' node for the SoC to hold all the nodes that have
> a reg property.

OK, we will use soc node in the next version.

>> +
>> +       sys: system-management@40460000 {
>> +               compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
>> +               reg = <0x0 0x40460000 0x0 0x200>;
>> +
>> +               reset: reset-controller {
>> +                       compatible = "nuvoton,ma35d1-reset";
>> +                       #reset-cells = <1>;
>> +               };
>> +       };
>> +
>> +       clk: clock-controller@40460200 {
>> +               compatible = "nuvoton,ma35d1-clk", "syscon";
>> +               reg = <0x00000000 0x40460200 0x0 0x100>;
>> +               #clock-cells = <1>;
>> +               clocks = <&clk_hxt>;
>> +               nuvoton,sys = <&sys>;
>> +       };
> It looks like the device at 40460000 is a reset and clock controller.
> Just make it one node and register the clk or reset device as an
> auxiliary device.

40460000 is for system control registers, including power contrl, 
multifunction pin control,
usb phy control, IP reset control, power-on setting information, and 
many other miscellaneous controls.
The registers of reset controller is only a subset of system control 
registers.

40460200 is for clock controller which is independent of the system 
control integration
The register base of clock controller is very close to system 
controller, but in fact the two are independent.


>> +
>> +       gic: interrupt-controller@50801000 {
>> +               compatible = "arm,gic-400";
>> +               reg =   <0x0 0x50801000 0 0x1000>, /* GICD */
>> +                       <0x0 0x50802000 0 0x2000>, /* GICC */
>> +                       <0x0 0x50804000 0 0x2000>, /* GICH */
>> +                       <0x0 0x50806000 0 0x2000>; /* GICV */
>> +               #interrupt-cells = <3>;
>> +               interrupt-parent = <&gic>;
>> +               interrupt-controller;
>> +               interrupts = <GIC_PPI 9 (GIC_CPU_MASK_RAW(0x13) |
>> +                             IRQ_TYPE_LEVEL_HIGH)>;
>> +       };
>> +
>> +       uart0:serial@40700000 {
> Add a space after :

I will fix it. Thank you.

>> +               compatible = "nuvoton,ma35d1-uart";
>> +               reg = <0x0 0x40700000 0x0 0x100>;
>> +               interrupts = <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
>> +               clocks = <&clk UART0_GATE>;
>> +               status = "disabled";
>> +       };


Best regards,
Jacky Huang

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Stephen Boyd]

Quoting Jacky Huang (2023-03-28 19:03:24)
> On 2023/3/29 上午 01:57, Stephen Boyd wrote:
> > Quoting Jacky Huang (2023-03-27 19:19:08)
> >> diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
> >> new file mode 100644
> >> index 000000000000..0740b0b218a7
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
> >> @@ -0,0 +1,231 @@
[...]
> >> +
> >> +               L2_0: l2-cache0 {
> > Just l2-cache for the node name. Doesn't it go under the cpu0 node as
> > well?
> 
> This describes the level-2 cache which is external to and shared by cpu0 
> & cpu1.
> And only level-1 cache is inside of CPU core.
> L2_0 is must, because both cpu0 and cpu1 has a next-level-cache = 
> <&L2_0> property.

Ok. The name should just be l2-cache then, not l2-cache0.

> 
> Many identical example of l2-cache node can be found in arm64 dts, such 
> as k3-arm642.dtsi,
> rk3328.dtsi, mt8195.dtsi, etc. Here is just a copy of similar arm64 
> multi-core SoCs.
> 
> So we would like to keep this unchanged. Is it OK for you? Thanks.
> 

Mostly ok, yes.

> 
> >> +
> >> +       sys: system-management@40460000 {
> >> +               compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
> >> +               reg = <0x0 0x40460000 0x0 0x200>;
> >> +
> >> +               reset: reset-controller {
> >> +                       compatible = "nuvoton,ma35d1-reset";
> >> +                       #reset-cells = <1>;
> >> +               };
> >> +       };
> >> +
> >> +       clk: clock-controller@40460200 {
> >> +               compatible = "nuvoton,ma35d1-clk", "syscon";
> >> +               reg = <0x00000000 0x40460200 0x0 0x100>;
> >> +               #clock-cells = <1>;
> >> +               clocks = <&clk_hxt>;
> >> +               nuvoton,sys = <&sys>;
> >> +       };
> > It looks like the device at 40460000 is a reset and clock controller.
> > Just make it one node and register the clk or reset device as an
> > auxiliary device.
> 
> 40460000 is for system control registers, including power contrl, 
> multifunction pin control,
> usb phy control, IP reset control, power-on setting information, and 
> many other miscellaneous controls.
> The registers of reset controller is only a subset of system control 
> registers.
> 
> 40460200 is for clock controller which is independent of the system 
> control integration
> The register base of clock controller is very close to system 
> controller, but in fact the two are independent.

What do you use the syscon for then? The clock driver must want to use
the syscon for something, implying that they are the same device.

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

Dear Stephen,


On 2023/3/29 上午 10:19, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-28 19:03:24)
>> On 2023/3/29 上午 01:57, Stephen Boyd wrote:
>>> Quoting Jacky Huang (2023-03-27 19:19:08)
>>>> diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>>>> new file mode 100644
>>>> index 000000000000..0740b0b218a7
>>>> --- /dev/null
>>>> +++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>>>> @@ -0,0 +1,231 @@
> [...]
>>>> +
>>>> +               L2_0: l2-cache0 {
>>> Just l2-cache for the node name. Doesn't it go under the cpu0 node as
>>> well?
>> This describes the level-2 cache which is external to and shared by cpu0
>> & cpu1.
>> And only level-1 cache is inside of CPU core.
>> L2_0 is must, because both cpu0 and cpu1 has a next-level-cache =
>> <&L2_0> property.
> Ok. The name should just be l2-cache then, not l2-cache0.

OK, I will fix it.

>> Many identical example of l2-cache node can be found in arm64 dts, such
>> as k3-arm642.dtsi,
>> rk3328.dtsi, mt8195.dtsi, etc. Here is just a copy of similar arm64
>> multi-core SoCs.
>>
>> So we would like to keep this unchanged. Is it OK for you? Thanks.
>>
> Mostly ok, yes.

Thank you for the agreement.

>
>>>> +
>>>> +       sys: system-management@40460000 {
>>>> +               compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
>>>> +               reg = <0x0 0x40460000 0x0 0x200>;
>>>> +
>>>> +               reset: reset-controller {
>>>> +                       compatible = "nuvoton,ma35d1-reset";
>>>> +                       #reset-cells = <1>;
>>>> +               };
>>>> +       };
>>>> +
>>>> +       clk: clock-controller@40460200 {
>>>> +               compatible = "nuvoton,ma35d1-clk", "syscon";
>>>> +               reg = <0x00000000 0x40460200 0x0 0x100>;
>>>> +               #clock-cells = <1>;
>>>> +               clocks = <&clk_hxt>;
>>>> +               nuvoton,sys = <&sys>;
>>>> +       };
>>> It looks like the device at 40460000 is a reset and clock controller.
>>> Just make it one node and register the clk or reset device as an
>>> auxiliary device.
>> 40460000 is for system control registers, including power contrl,
>> multifunction pin control,
>> usb phy control, IP reset control, power-on setting information, and
>> many other miscellaneous controls.
>> The registers of reset controller is only a subset of system control
>> registers.
>>
>> 40460200 is for clock controller which is independent of the system
>> control integration
>> The register base of clock controller is very close to system
>> controller, but in fact the two are independent.
> What do you use the syscon for then? The clock driver must want to use
> the syscon for something, implying that they are the same device.

The register lock mechanism is applied to protect many critical 
registers from false written.
The register lock control register is one register in system controller.
Some registers of the clock controller are lock protected. Not only 
clock controller, but other
IP such as RTC, PWM, ADC, etc, also have lock protected registers. All 
these IP requires
syscon to access the lock/unlock control register in the system controller.
That's why we add a <&sys> to the clock controller.

Should we implement a ma35d1-sysctl driver to protect register_lock() 
and register_unlock()
and export to those drivers?  If yes, we can remove the <&sys> from 
clock controller.


Best regards,
Jacky Huang

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Stephen Boyd]

Quoting Jacky Huang (2023-03-28 19:39:36)
> On 2023/3/29 上午 10:19, Stephen Boyd wrote:
> > What do you use the syscon for then? The clock driver must want to use
> > the syscon for something, implying that they are the same device.
> 
> The register lock mechanism is applied to protect many critical 
> registers from false written.
> The register lock control register is one register in system controller.
> Some registers of the clock controller are lock protected. Not only 
> clock controller, but other
> IP such as RTC, PWM, ADC, etc, also have lock protected registers. All 
> these IP requires
> syscon to access the lock/unlock control register in the system controller.
> That's why we add a <&sys> to the clock controller.
> 
> Should we implement a ma35d1-sysctl driver to protect register_lock() 
> and register_unlock()
> and export to those drivers?  If yes, we can remove the <&sys> from 
> clock controller.
> 

You can implement the lock and unlock in the hwspinlock framework. See
drivers/hwspinlock.

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

Dear Stephen,


On 2023/3/29 上午 10:46, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-28 19:39:36)
>> On 2023/3/29 上午 10:19, Stephen Boyd wrote:
>>> What do you use the syscon for then? The clock driver must want to use
>>> the syscon for something, implying that they are the same device.
>> The register lock mechanism is applied to protect many critical
>> registers from false written.
>> The register lock control register is one register in system controller.
>> Some registers of the clock controller are lock protected. Not only
>> clock controller, but other
>> IP such as RTC, PWM, ADC, etc, also have lock protected registers. All
>> these IP requires
>> syscon to access the lock/unlock control register in the system controller.
>> That's why we add a <&sys> to the clock controller.
>>
>> Should we implement a ma35d1-sysctl driver to protect register_lock()
>> and register_unlock()
>> and export to those drivers?  If yes, we can remove the <&sys> from
>> clock controller.
>>
> You can implement the lock and unlock in the hwspinlock framework. See
> drivers/hwspinlock.

I may not explain clearly enough. The lock/unlock register of system 
controller is more like
a kind of write protection for specific registers, rather than 
preventing hetero-core CPU access.
In many different IP of ma35d1 contain write protected registers.
In fact, ma35d1 has a "hardware semaphore" IP, and we have implemented 
the driver in drivers/hwspinlock.
Even the control register of "hardware semaphore" is also write protected.

So, should we implement a system controller driver to provide 
register_unlock() function?
Is it OK to have such a driver in drivers/mfd?
Or, just use syscon in device tree for those devices that have write 
protect registers.


Best regards,
Jacky Huang

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Stephen Boyd]

Quoting Jacky Huang (2023-03-28 20:13:11)
> Dear Stephen,
> 
> 
> On 2023/3/29 上午 10:46, Stephen Boyd wrote:
> > Quoting Jacky Huang (2023-03-28 19:39:36)
> >> On 2023/3/29 上午 10:19, Stephen Boyd wrote:
> >>> What do you use the syscon for then? The clock driver must want to use
> >>> the syscon for something, implying that they are the same device.
> >> The register lock mechanism is applied to protect many critical
> >> registers from false written.
> >> The register lock control register is one register in system controller.
> >> Some registers of the clock controller are lock protected. Not only
> >> clock controller, but other
> >> IP such as RTC, PWM, ADC, etc, also have lock protected registers. All
> >> these IP requires
> >> syscon to access the lock/unlock control register in the system controller.
> >> That's why we add a <&sys> to the clock controller.
> >>
> >> Should we implement a ma35d1-sysctl driver to protect register_lock()
> >> and register_unlock()
> >> and export to those drivers?  If yes, we can remove the <&sys> from
> >> clock controller.
> >>
> > You can implement the lock and unlock in the hwspinlock framework. See
> > drivers/hwspinlock.
> 
> I may not explain clearly enough. The lock/unlock register of system 
> controller is more like
> a kind of write protection for specific registers, rather than 
> preventing hetero-core CPU access.
> In many different IP of ma35d1 contain write protected registers.
> In fact, ma35d1 has a "hardware semaphore" IP, and we have implemented 
> the driver in drivers/hwspinlock.
> Even the control register of "hardware semaphore" is also write protected.

What's the need to lock and unlock the registers? Is some other
processor also writing to the registers that we need to synchronize
against? Or is Linux the only entity reading and writing the registers?
I'm wondering if we should simply unlock the registers and never lock
them.

> 
> So, should we implement a system controller driver to provide 
> register_unlock() function?
> Is it OK to have such a driver in drivers/mfd?
> Or, just use syscon in device tree for those devices that have write 
> protect registers.
> 

The hwspinlock framework doesn't require there to be another entity
accessing some resource. It's there to implement hardware locks. I don't
see why it can't be used here.

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

Dear Stephen,


On 2023/3/29 上午 11:25, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-28 20:13:11)
>> Dear Stephen,
>>
>>
>> On 2023/3/29 上午 10:46, Stephen Boyd wrote:
>>> Quoting Jacky Huang (2023-03-28 19:39:36)
>>>> On 2023/3/29 上午 10:19, Stephen Boyd wrote:
>>>>> What do you use the syscon for then? The clock driver must want to use
>>>>> the syscon for something, implying that they are the same device.
>>>> The register lock mechanism is applied to protect many critical
>>>> registers from false written.
>>>> The register lock control register is one register in system controller.
>>>> Some registers of the clock controller are lock protected. Not only
>>>> clock controller, but other
>>>> IP such as RTC, PWM, ADC, etc, also have lock protected registers. All
>>>> these IP requires
>>>> syscon to access the lock/unlock control register in the system controller.
>>>> That's why we add a <&sys> to the clock controller.
>>>>
>>>> Should we implement a ma35d1-sysctl driver to protect register_lock()
>>>> and register_unlock()
>>>> and export to those drivers?  If yes, we can remove the <&sys> from
>>>> clock controller.
>>>>
>>> You can implement the lock and unlock in the hwspinlock framework. See
>>> drivers/hwspinlock.
>> I may not explain clearly enough. The lock/unlock register of system
>> controller is more like
>> a kind of write protection for specific registers, rather than
>> preventing hetero-core CPU access.
>> In many different IP of ma35d1 contain write protected registers.
>> In fact, ma35d1 has a "hardware semaphore" IP, and we have implemented
>> the driver in drivers/hwspinlock.
>> Even the control register of "hardware semaphore" is also write protected.
> What's the need to lock and unlock the registers? Is some other
> processor also writing to the registers that we need to synchronize
> against? Or is Linux the only entity reading and writing the registers?
> I'm wondering if we should simply unlock the registers and never lock
> them.
>
>> So, should we implement a system controller driver to provide
>> register_unlock() function?
>> Is it OK to have such a driver in drivers/mfd?
>> Or, just use syscon in device tree for those devices that have write
>> protect registers.
>>
> The hwspinlock framework doesn't require there to be another entity
> accessing some resource. It's there to implement hardware locks. I don't
> see why it can't be used here.

The current usage of register lock/unlock protect is as the following code:

static void ma35d1_unlock_regs(struct ma35d1_clk_pll *pll)
{
     int ret;

     do {
         regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x59);
         regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x16);
         regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x88);
         regmap_read(pll->regmap, REG_SYS_RLKTZNS, &ret);
     } while (ret == 0);
}

static void ma35d1_lock_regs(struct ma35d1_clk_pll *pll)
{
     regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x0);
}

And the following code is to unlock registers for write and then lock again.

     ma35d1_unlock_regs(pll);
     writel_relaxed(reg_ctl[0], pll->ctl0_base);
     writel_relaxed(reg_ctl[1], pll->ctl1_base);
     writel_relaxed(reg_ctl[2], pll->ctl2_base);
     ma35d1_lock_regs(pll);

The above code is from the clk-ma35d1-pll.c from this patchset.

We just employ regmap mechansim for the access to REG_SYS_RLKTZNS register.
Is this implementation OK for you?  Thank you.


Best regards,
Jacky Huang

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Stephen Boyd]

Quoting Jacky Huang (2023-03-28 20:43:23)
> On 2023/3/29 上午 11:25, Stephen Boyd wrote:
> > Quoting Jacky Huang (2023-03-28 20:13:11)
> >> I may not explain clearly enough. The lock/unlock register of system
> >> controller is more like
> >> a kind of write protection for specific registers, rather than
> >> preventing hetero-core CPU access.
> >> In many different IP of ma35d1 contain write protected registers.
> >> In fact, ma35d1 has a "hardware semaphore" IP, and we have implemented
> >> the driver in drivers/hwspinlock.
> >> Even the control register of "hardware semaphore" is also write protected.
> > What's the need to lock and unlock the registers? Is some other
> > processor also writing to the registers that we need to synchronize
> > against? Or is Linux the only entity reading and writing the registers?
> > I'm wondering if we should simply unlock the registers and never lock
> > them.

Can you answer this question?

> >
> >> So, should we implement a system controller driver to provide
> >> register_unlock() function?
> >> Is it OK to have such a driver in drivers/mfd?
> >> Or, just use syscon in device tree for those devices that have write
> >> protect registers.
> >>
> > The hwspinlock framework doesn't require there to be another entity
> > accessing some resource. It's there to implement hardware locks. I don't
> > see why it can't be used here.
> 
> The current usage of register lock/unlock protect is as the following code:
> 
> static void ma35d1_unlock_regs(struct ma35d1_clk_pll *pll)
> {
>      int ret;
> 
>      do {
>          regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x59);
>          regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x16);
>          regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x88);
>          regmap_read(pll->regmap, REG_SYS_RLKTZNS, &ret);
>      } while (ret == 0);
> }
> 
> static void ma35d1_lock_regs(struct ma35d1_clk_pll *pll)
> {
>      regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x0);
> }
> 
> And the following code is to unlock registers for write and then lock again.
> 
>      ma35d1_unlock_regs(pll);
>      writel_relaxed(reg_ctl[0], pll->ctl0_base);
>      writel_relaxed(reg_ctl[1], pll->ctl1_base);
>      writel_relaxed(reg_ctl[2], pll->ctl2_base);
>      ma35d1_lock_regs(pll);
> 
> The above code is from the clk-ma35d1-pll.c from this patchset.

Yeah I understand that you write some registers in the syscon to lock
the registers.

> 
> We just employ regmap mechansim for the access to REG_SYS_RLKTZNS register.
> Is this implementation OK for you?  Thank you.
> 

No. Why can't that be a hwspinlock? Or why can't it be unlocked all the
time and rely on software spinlocks in the kernel to prevent concurrent
access to the registers accessed by a driver, like a lock for the clk
registers and a lock for the reset registers, etc. Or if no two clks or
resets exist within one 32-bit word then no lock is necessary.

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

Dear Stephen,



On 2023/3/29 上午 11:54, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-28 20:43:23)
>> On 2023/3/29 上午 11:25, Stephen Boyd wrote:
>>> Quoting Jacky Huang (2023-03-28 20:13:11)
>>>> I may not explain clearly enough. The lock/unlock register of system
>>>> controller is more like
>>>> a kind of write protection for specific registers, rather than
>>>> preventing hetero-core CPU access.
>>>> In many different IP of ma35d1 contain write protected registers.
>>>> In fact, ma35d1 has a "hardware semaphore" IP, and we have implemented
>>>> the driver in drivers/hwspinlock.
>>>> Even the control register of "hardware semaphore" is also write protected.
>>> What's the need to lock and unlock the registers? Is some other
>>> processor also writing to the registers that we need to synchronize
>>> against? Or is Linux the only entity reading and writing the registers?
>>> I'm wondering if we should simply unlock the registers and never lock
>>> them.
> Can you answer this question?

Sorry, I miss this.
The lock and unlock register mechanism is a hardware design of ma35d1 SoC.
The purpose is to prevent from unexpected write to some registers.
However, I think this is a redundant design if s/w is done properly.
Even though I think it's a redundant design, it's out there and we have 
to deal with it.
And of course we have unlock and lock pair, I just lost to write in the 
above.

>>>> So, should we implement a system controller driver to provide
>>>> register_unlock() function?
>>>> Is it OK to have such a driver in drivers/mfd?
>>>> Or, just use syscon in device tree for those devices that have write
>>>> protect registers.
>>>>
>>> The hwspinlock framework doesn't require there to be another entity
>>> accessing some resource. It's there to implement hardware locks. I don't
>>> see why it can't be used here.
>> The current usage of register lock/unlock protect is as the following code:
>>
>> static void ma35d1_unlock_regs(struct ma35d1_clk_pll *pll)
>> {
>>       int ret;
>>
>>       do {
>>           regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x59);
>>           regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x16);
>>           regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x88);
>>           regmap_read(pll->regmap, REG_SYS_RLKTZNS, &ret);
>>       } while (ret == 0);
>> }
>>
>> static void ma35d1_lock_regs(struct ma35d1_clk_pll *pll)
>> {
>>       regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x0);
>> }
>>
>> And the following code is to unlock registers for write and then lock again.
>>
>>       ma35d1_unlock_regs(pll);
>>       writel_relaxed(reg_ctl[0], pll->ctl0_base);
>>       writel_relaxed(reg_ctl[1], pll->ctl1_base);
>>       writel_relaxed(reg_ctl[2], pll->ctl2_base);
>>       ma35d1_lock_regs(pll);
>>
>> The above code is from the clk-ma35d1-pll.c from this patchset.
> Yeah I understand that you write some registers in the syscon to lock
> the registers.
>
>> We just employ regmap mechansim for the access to REG_SYS_RLKTZNS register.
>> Is this implementation OK for you?  Thank you.
>>
> No. Why can't that be a hwspinlock? Or why can't it be unlocked all the
> time and rely on software spinlocks in the kernel to prevent concurrent
> access to the registers accessed by a driver, like a lock for the clk
> registers and a lock for the reset registers, etc. Or if no two clks or
> resets exist within one 32-bit word then no lock is necessary.

You gave a good suggestion here. Yes, of course we can let it be 
unlocked all the time.
We can unlock the "register lock" before entering Linux.
As a result, the unlonk and lock register related code is not required.
Thus, we can remove syscon from the clock controller node.

If you agree with this, we will modify it in the next version.


Best regards,
Jacky Huang

Re: [PATCH v6 11/12] tty: serial: Add Nuvoton ma35d1 serial driver support

[Jacky Huang]

Dear Jiri,


Thanks for your advice.

On 2023/3/28 下午 05:23, Jiri Slaby wrote:
> On 28. 03. 23, 4:19, Jacky Huang wrote:
>> +static void transmit_chars(struct uart_ma35d1_port *up)
>> +{
>> +    struct circ_buf *xmit = &up->port.state->xmit;
>> +    int count;
>> +    u8 ch;
>> +
>> +    if (uart_tx_stopped(&up->port)) {
>> +        ma35d1serial_stop_tx(&up->port);
>> +        return;
>> +    }
>> +    if (uart_circ_empty(xmit)) {
>> +        __stop_tx(up);
>> +        return;
>> +    }
>
> Why is this necessary?
>

I will remove this reduntant uart_circ_empty() check.

>> +    count = UART_FIFO_DEPTH - ((serial_in(up, UART_REG_FSR) & 
>> FSR_TXPTR_MSK) >> 16);
>> +
>> +    uart_port_tx_limited(&up->port, ch, count,
>> +                 !(serial_in(up, UART_REG_FSR) & FSR_TX_FULL),
>> +                 serial_out(up, UART_REG_THR, ch),
>> +                 ({}));
>> +
>> +    if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
>> +        uart_write_wakeup(&up->port);
>> +
>> +    if (uart_circ_empty(xmit))
>> +        __stop_tx(up);
>
> uart_port_tx_limited() should take care about the above and this too, 
> right?

Yes, you are right. These two are also redundant. I will remove them.
Thank you.

>
>> +}
> ...
>> +static void receive_chars(struct uart_ma35d1_port *up)
>> +{
>> +    u8 flag;
>> +    u32 fsr;
>> +    unsigned int ch;
>
> Shouldn't ch be u8 too?

OK, I will fix it as u8.

>
>> +    int max_count = 256;
>> +
>> +    fsr = serial_in(up, UART_REG_FSR);
>> +    do {
>> +        flag = TTY_NORMAL;
>> +        up->port.icount.rx++;
>> +
>> +        if (unlikely(fsr & (FSR_BIF | FSR_FEF | FSR_PEF | 
>> FSR_RX_OVER_IF))) {
>> +            if (fsr & FSR_BIF) {
>> +                up->port.icount.brk++;
>> +                if (uart_handle_break(&up->port))
>> +                    continue;
>> +            }
>> +            if (fsr & FSR_FEF)
>> +                up->port.icount.frame++;
>> +            if (fsr & FSR_PEF)
>> +                up->port.icount.parity++;
>> +            if (fsr & FSR_RX_OVER_IF)
>> +                up->port.icount.overrun++;
>> +
>> +            serial_out(up, UART_REG_FSR, fsr &
>> +                   (FSR_BIF | FSR_FEF | FSR_PEF | FSR_RX_OVER_IF));
>> +
>> +            if (fsr & FSR_BIF)
>> +                flag = TTY_BREAK;
>> +            else if (fsr & FSR_PEF)
>> +                flag = TTY_PARITY;
>> +            else if (fsr & FSR_FEF)
>> +                flag = TTY_FRAME;
>> +        }
>> +
>> +        ch = serial_in(up, UART_REG_RBR);
>> +        if (uart_handle_sysrq_char(&up->port, ch))
>> +            continue;
>> +
>> +        spin_lock(&up->port.lock);
>> +        uart_insert_char(&up->port, fsr, FSR_RX_OVER_IF, ch, flag);
>> +        spin_unlock(&up->port.lock);
>> +
>> +        fsr = serial_in(up, UART_REG_FSR);
>> +    } while (!(fsr & FSR_RX_EMPTY) && (max_count-- > 0));
>> +
>> +    spin_lock(&up->port.lock);
>> +    tty_flip_buffer_push(&up->port.state->port);
>> +    spin_unlock(&up->port.lock);
>> +}
> ...
>> +static int ma35d1serial_remove(struct platform_device *dev)
>> +{
>> +    struct uart_port *port = platform_get_drvdata(dev);
>> +
>> +    if (port) {
>
> Can this ever be NULL?

OK, I will remove this NULL check.

>
>> + uart_remove_one_port(&ma35d1serial_reg, port);
>> +        free_irq(port->irq, port);
>> +    }
>> +    return 0;
>> +}
>> +
>> +static int ma35d1serial_suspend(struct platform_device *dev, 
>> pm_message_t state)
>> +{
>> +    int i;
>> +    struct uart_ma35d1_port *up;
>> +
>> +    if (dev->dev.of_node)
>> +        i = of_alias_get_id(dev->dev.of_node, "serial");
>> +    if (i < 0) {
>> +        dev_err(&dev->dev, "failed to get alias/pdev id, errno 
>> %d\n", i);
>> +        return i;
>> +    }
>> +    up = &ma35d1serial_ports[i];
>
> platform_get_drvdata(dev) ?

We will fix it.

>
>> +    if (i == 0) {
>> +        up->console_baud_rate = serial_in(up, UART_REG_BAUD);
>> +        up->console_line = serial_in(up, UART_REG_LCR);
>> +        up->console_int = serial_in(up, UART_REG_IER);
>> +    }
>> +    return 0;
>> +}
>> +
>> +static int ma35d1serial_resume(struct platform_device *dev)
>> +{
>> +    int i;
>> +    struct uart_ma35d1_port *up;
>> +
>> +    if (dev->dev.of_node)
>> +        i = of_alias_get_id(dev->dev.of_node, "serial");
>> +    if (i < 0) {
>> +        dev_err(&dev->dev, "failed to get alias/pdev id, errno 
>> %d\n", i);
>> +        return i;
>> +    }
>> +    up = &ma35d1serial_ports[i];
>> +    if (i == 0) {
>> +        serial_out(up, UART_REG_BAUD, up->console_baud_rate);
>> +        serial_out(up, UART_REG_LCR, up->console_line);
>> +        serial_out(up, UART_REG_IER, up->console_int);
>> +    }
>> +    return 0;
>> +}
>
> No uart_suspend_port()/uart_resume_port()? You don't wait for 
> transmitter to be empty in suspend. You don't stop tx etc.
>

We will fix it in the next version.

>> +static struct platform_driver ma35d1serial_driver = {
>> +    .probe      = ma35d1serial_probe,
>> +    .remove     = ma35d1serial_remove,
>> +    .suspend    = ma35d1serial_suspend,
>> +    .resume     = ma35d1serial_resume,
>> +    .driver     = {
>> +        .name   = "ma35d1-uart",
>> +        .owner  = THIS_MODULE,
>> +        .of_match_table = of_match_ptr(ma35d1_serial_of_match),
>> +    },
>> +};
>> +
>> +static int __init ma35d1serial_init(void)
>> +{
>> +    int ret;
>> +
>> +    ret = uart_register_driver(&ma35d1serial_reg);
>> +    if (ret)
>> +        return ret;
>> +    ret = platform_driver_register(&ma35d1serial_driver);
>> +    if (ret)
>> +        uart_unregister_driver(&ma35d1serial_reg);
>> +    return ret;
>> +}
>> +
>> +static void __exit ma35d1serial_exit(void)
>> +{
>> +    platform_driver_unregister(&ma35d1serial_driver);
>> +    uart_unregister_driver(&ma35d1serial_reg);
>> +}
>> +
>> +module_init(ma35d1serial_init);
>> +module_exit(ma35d1serial_exit);
>> +
>> +MODULE_LICENSE("GPL");
>> +MODULE_DESCRIPTION("MA35D1 serial driver");
>
>
>> +MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
>
> Why is this needed? How are other platform drivers autoloaded?
>
> thanks,

Yes, it's not needed. I will remove it.


Best regards,
Jacky Huang

Re: [PATCH v6 03/12] dt-bindings: clock: nuvoton: add binding for ma35d1 clock controller

[Krzysztof Kozlowski]

On 28/03/2023 04:19, Jacky Huang wrote:
> From: Jacky Huang <ychuang3@nuvoton.com>
> 
> Add the dt-bindings header for Nuvoton ma35d1, that gets shared
> between the clock controller and clock references in the dts.
> Add documentation to describe nuvoton ma35d1 clock driver.
> 
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> ---

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Krzysztof Kozlowski]

On 28/03/2023 04:19, Jacky Huang wrote:
> From: Jacky Huang <ychuang3@nuvoton.com>

Subject: drop second/last, redundant "bindings". The "dt-bindings"
prefix is already stating that these are bindings.

This is a friendly reminder during the review process.

It seems my previous comments were not fully addressed. Maybe my
feedback got lost between the quotes, maybe you just forgot to apply it.
Please go back to the previous discussion and either implement all
requested changes or keep discussing them.

Thank you.

> 
> Add the dt-bindings header for Nuvoton ma35d1, that gets shared
> between the reset controller and reset references in the dts.
> Add documentation to describe nuvoton ma35d1 reset driver.
> 
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> ---
>  .../bindings/reset/nuvoton,ma35d1-reset.yaml  |  44 +++++++
>  .../dt-bindings/reset/nuvoton,ma35d1-reset.h  | 108 ++++++++++++++++++
>  2 files changed, 152 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>  create mode 100644 include/dt-bindings/reset/nuvoton,ma35d1-reset.h
> 
> diff --git a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
> new file mode 100644
> index 000000000000..342717257e5c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reset/nuvoton,ma35d1-reset.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Nuvoton MA35D1 Reset Controller
> +
> +maintainers:
> +  - Chi-Fang Li <cfli0@nuvoton.com>
> +  - Jacky Huang <ychuang3@nuvoton.com>
> +
> +description:
> +  The system reset controller can be used to reset various peripheral
> +  controllers in MA35D1 SoC.
> +
> +properties:
> +  compatible:
> +    const: nuvoton,ma35d1-reset
> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  # system reset controller node:
> +  - |
> +
> +    system-management@40460000 {
> +        compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
> +        reg = <0x40460000 0x200>;
> +
> +        reset-controller {
> +            compatible = "nuvoton,ma35d1-reset";
> +            #reset-cells = <1>;

You do not take any resources here, thus this should be rather part of
the parent node.

> +        };
> +    };
> +...
> +
> diff --git a/include/dt-bindings/reset/nuvoton,ma35d1-reset.h b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
> new file mode 100644
> index 000000000000..f3088bc0afec
> --- /dev/null
> +++ b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
> @@ -0,0 +1,108 @@
> +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) */

Weird license, why 2.0+?

You already got here comment about license in previous version of this
patch.


> +/*
> + * Copyright (C) 2023 Nuvoton Technologies.
> + * Author: Chi-Fen Li <cfli0@nuvoton.com>
> + *
> + * Device Tree binding constants for MA35D1 reset controller.
> + */
> +
> +#ifndef __DT_BINDINGS_RESET_MA35D1_H
> +#define __DT_BINDINGS_RESET_MA35D1_H
> +
> +#define MA35D1_RESET_CHIP	0
> +#define MA35D1_RESET_CA35CR0	1
> +#define MA35D1_RESET_CA35CR1	2
> +#define MA35D1_RESET_CM4	3
> +#define MA35D1_RESET_PDMA0	4
> +#define MA35D1_RESET_PDMA1	5
> +#define MA35D1_RESET_PDMA2	6
> +#define MA35D1_RESET_PDMA3	7
> +#define MA35D1_RESET_DISP	9
> +#define MA35D1_RESET_VCAP0	10
> +#define MA35D1_RESET_VCAP1	11
> +#define MA35D1_RESET_GFX	12
> +#define MA35D1_RESET_VDEC	13
> +#define MA35D1_RESET_WHC0	14
> +#define MA35D1_RESET_WHC1	15
> +#define MA35D1_RESET_GMAC0	16
> +#define MA35D1_RESET_GMAC1	17
> +#define MA35D1_RESET_HWSEM	18
> +#define MA35D1_RESET_EBI	19
> +#define MA35D1_RESET_HSUSBH0	20
> +#define MA35D1_RESET_HSUSBH1	21
> +#define MA35D1_RESET_HSUSBD	22
> +#define MA35D1_RESET_USBHL	23
> +#define MA35D1_RESET_SDH0	24
> +#define MA35D1_RESET_SDH1	25
> +#define MA35D1_RESET_NAND	26
> +#define MA35D1_RESET_GPIO	27
> +#define MA35D1_RESET_MCTLP	28
> +#define MA35D1_RESET_MCTLC	29
> +#define MA35D1_RESET_DDRPUB	30
> +#define MA35D1_RESET_TMR0	34
> +#define MA35D1_RESET_TMR1	35
> +#define MA35D1_RESET_TMR2	36
> +#define MA35D1_RESET_TMR3	37
> +#define MA35D1_RESET_I2C0	40
> +#define MA35D1_RESET_I2C1	41
> +#define MA35D1_RESET_I2C2	42
> +#define MA35D1_RESET_I2C3	43
> +#define MA35D1_RESET_QSPI0	44
> +#define MA35D1_RESET_SPI0	45
> +#define MA35D1_RESET_SPI1	46
> +#define MA35D1_RESET_SPI2	47
> +#define MA35D1_RESET_UART0	48
> +#define MA35D1_RESET_UART1	49
> +#define MA35D1_RESET_UART2	50
> +#define MA35D1_RESET_UAER3	51
> +#define MA35D1_RESET_UART4	52
> +#define MA35D1_RESET_UART5	53
> +#define MA35D1_RESET_UART6	54
> +#define MA35D1_RESET_UART7	55
> +#define MA35D1_RESET_CANFD0	56
> +#define MA35D1_RESET_CANFD1	57
> +#define MA35D1_RESET_EADC0	60

Why do you have gaps here? These should be IDs, not register offsets.

Best regards,
Krzysztof

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Krzysztof Kozlowski]

On 28/03/2023 04:19, Jacky Huang wrote:
> From: Jacky Huang <ychuang3@nuvoton.com>
> 
> Rename the bindings/arm/npcm directory as nuvoton.
> Add binding for ARMv8 based Nuvotn SoCs and platform boards.

Typo: Nucotn?

> Add initial bindings for ma35d1 series development boards.
> 
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> ---
>  .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++

Anyway robot pointed to issues here...


Best regards,
Krzysztof

Re: [PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Krzysztof Kozlowski]

On 28/03/2023 04:19, Jacky Huang wrote:
> From: Jacky Huang <ychuang3@nuvoton.com>
> 
> Add documentation to describe nuvoton ma35d1 uart driver bindings.
> 

This depends on clock patches, so it must be taken together.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Krzysztof Kozlowski]

On 28/03/2023 04:19, Jacky Huang wrote:
> From: Jacky Huang <ychuang3@nuvoton.com>
> 
> Add initial device tree support for Nuvoton ma35d1 SoC, including
> cpu, clock, reset, and serial controllers.
> Add reference boards som-256m and iot-512m.
> 
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>



> +	gic: interrupt-controller@50801000 {
> +		compatible = "arm,gic-400";
> +		reg =   <0x0 0x50801000 0 0x1000>, /* GICD */
> +			<0x0 0x50802000 0 0x2000>, /* GICC */
> +			<0x0 0x50804000 0 0x2000>, /* GICH */
> +			<0x0 0x50806000 0 0x2000>; /* GICV */
> +		#interrupt-cells = <3>;
> +		interrupt-parent = <&gic>;
> +		interrupt-controller;
> +		interrupts = <GIC_PPI 9 (GIC_CPU_MASK_RAW(0x13) |
> +			      IRQ_TYPE_LEVEL_HIGH)>;
> +	};
> +
> +	uart0:serial@40700000 {

There is always space after label:.


Best regards,
Krzysztof

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Jacky Huang]

Dear Krzysztof,


On 2023/3/29 下午 04:19, Krzysztof Kozlowski wrote:
> On 28/03/2023 04:19, Jacky Huang wrote:
>> From: Jacky Huang <ychuang3@nuvoton.com>
>>
>> Rename the bindings/arm/npcm directory as nuvoton.
>> Add binding for ARMv8 based Nuvotn SoCs and platform boards.
> Typo: Nucotn?

I will fix it. Thank you.

>> Add initial bindings for ma35d1 series development boards.
>>
>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>> ---
>>   .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
> Anyway robot pointed to issues here...
>
>
> Best regards,
> Krzysztof
>

The robot report path error in MAINTAINER. I should modify it when I 
rename the npcm directory.


Best regards,
Jacky Huang

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Jacky Huang]

Dear Krzysztof,


On 2023/3/29 下午 04:21, Krzysztof Kozlowski wrote:
> On 28/03/2023 04:19, Jacky Huang wrote:
>> From: Jacky Huang <ychuang3@nuvoton.com>
>>
>> Add initial device tree support for Nuvoton ma35d1 SoC, including
>> cpu, clock, reset, and serial controllers.
>> Add reference boards som-256m and iot-512m.
>>
>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>
>
>> +	gic: interrupt-controller@50801000 {
>> +		compatible = "arm,gic-400";
>> +		reg =   <0x0 0x50801000 0 0x1000>, /* GICD */
>> +			<0x0 0x50802000 0 0x2000>, /* GICC */
>> +			<0x0 0x50804000 0 0x2000>, /* GICH */
>> +			<0x0 0x50806000 0 0x2000>; /* GICV */
>> +		#interrupt-cells = <3>;
>> +		interrupt-parent = <&gic>;
>> +		interrupt-controller;
>> +		interrupts = <GIC_PPI 9 (GIC_CPU_MASK_RAW(0x13) |
>> +			      IRQ_TYPE_LEVEL_HIGH)>;
>> +	};
>> +
>> +	uart0:serial@40700000 {
> There is always space after label:.
>
>
> Best regards,
> Krzysztof
>

I will fix them all.


Best regards,
Jacky Huang

Re: [PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Jacky Huang]

Dear Krzysztof,


Thanks for your review.


On 2023/3/29 下午 04:20, Krzysztof Kozlowski wrote:
> On 28/03/2023 04:19, Jacky Huang wrote:
>> From: Jacky Huang <ychuang3@nuvoton.com>
>>
>> Add documentation to describe nuvoton ma35d1 uart driver bindings.
>>
> This depends on clock patches, so it must be taken together.
>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>
> Best regards,
> Krzysztof
>

OK, I will combine this patch with the clock patch.


Best regards,
Jacky Huang

Re: [PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Jacky Huang]

Dear Stephen,


On 2023/3/29 上午 01:48, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-27 19:19:04)
>> +description:
>> +  The system reset controller can be used to reset various peripheral
>> +  controllers in MA35D1 SoC.
>> +
>> +properties:
>> +  compatible:
>> +    const: nuvoton,ma35d1-reset
>> +
>> +  '#reset-cells':
>> +    const: 1
>> +
>> +required:
>> +  - compatible
>> +  - '#reset-cells'
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  # system reset controller node:
>> +  - |
>> +
>> +    system-management@40460000 {
>> +        compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
>> +        reg = <0x40460000 0x200>;
>> +
>> +        reset-controller {
>> +            compatible = "nuvoton,ma35d1-reset";
>> +            #reset-cells = <1>;
>> +        };
> This is prescribing driver details to the system-management node. The
> reset-controller node should be removed, the #reset-cells moved up one
> level, and the "nuvoton,ma35d1-sys" should match a driver that registers
> an auxiliary device for reset functionality. Is anything besides child
> nodes like 'reset-controller' using the syscon@40460000?

OK, I will modify it as:

     sys: system-management@40460000 {
         compatible = "nuvoton,ma35d1-sys", "syscon",;
         reg = <0x0 0x40460000 0x0 0x200>;
         #reset-cells = <1>;
         };
     };

And my reset driver will use compatible "nuvoton,ma35d1-sys", instead of 
"nuvoton,ma35d1-reset".
There' no other node like reset-controller.


Best regards,
Jack Huang

Re: [PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Jacky Huang]

Dear Krzysztof,


On 2023/3/29 下午 04:17, Krzysztof Kozlowski wrote:
> On 28/03/2023 04:19, Jacky Huang wrote:
>> From: Jacky Huang <ychuang3@nuvoton.com>
> Subject: drop second/last, redundant "bindings". The "dt-bindings"
> prefix is already stating that these are bindings.
>
> This is a friendly reminder during the review process.
>
> It seems my previous comments were not fully addressed. Maybe my
> feedback got lost between the quotes, maybe you just forgot to apply it.
> Please go back to the previous discussion and either implement all
> requested changes or keep discussing them.
>
> Thank you.
>
>> Add the dt-bindings header for Nuvoton ma35d1, that gets shared
>> between the reset controller and reset references in the dts.
>> Add documentation to describe nuvoton ma35d1 reset driver.
>>
>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>> ---
>>   .../bindings/reset/nuvoton,ma35d1-reset.yaml  |  44 +++++++
>>   .../dt-bindings/reset/nuvoton,ma35d1-reset.h  | 108 ++++++++++++++++++
>>   2 files changed, 152 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>>   create mode 100644 include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>>
>> diff --git a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>> new file mode 100644
>> index 000000000000..342717257e5c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
>> @@ -0,0 +1,44 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/reset/nuvoton,ma35d1-reset.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Nuvoton MA35D1 Reset Controller
>> +
>> +maintainers:
>> +  - Chi-Fang Li <cfli0@nuvoton.com>
>> +  - Jacky Huang <ychuang3@nuvoton.com>
>> +
>> +description:
>> +  The system reset controller can be used to reset various peripheral
>> +  controllers in MA35D1 SoC.
>> +
>> +properties:
>> +  compatible:
>> +    const: nuvoton,ma35d1-reset
>> +
>> +  '#reset-cells':
>> +    const: 1
>> +
>> +required:
>> +  - compatible
>> +  - '#reset-cells'
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  # system reset controller node:
>> +  - |
>> +
>> +    system-management@40460000 {
>> +        compatible = "nuvoton,ma35d1-sys", "syscon", "simple-mfd";
>> +        reg = <0x40460000 0x200>;
>> +
>> +        reset-controller {
>> +            compatible = "nuvoton,ma35d1-reset";
>> +            #reset-cells = <1>;
> You do not take any resources here, thus this should be rather part of
> the parent node.

I will modify it as:
     sys: system-management@40460000 {
         compatible = "nuvoton,ma35d1-sys", "syscon",;
         reg = <0x0 0x40460000 0x0 0x200>;
         #reset-cells = <1>;
         };
     };


>> +        };
>> +    };
>> +...
>> +
>> diff --git a/include/dt-bindings/reset/nuvoton,ma35d1-reset.h b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>> new file mode 100644
>> index 000000000000..f3088bc0afec
>> --- /dev/null
>> +++ b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>> @@ -0,0 +1,108 @@
>> +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) */
> Weird license, why 2.0+?
>
> You already got here comment about license in previous version of this
> patch.
>

In fact, I always be confused with the license.
It should be right if I just copy one from the same directory 
/include/dt-bindings/reset/.
But, when I find there are several versions there, I was confused and 
just select one of them.

/* SPDX-License-Identifier: GPL-2.0-only */
/* SPDX-License-Identifier: GPL-2.0+ */
/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)*/
/* SPDX-License-Identifier: (GPL-2.0+ or MIT) */
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */

So, should I fix the license as

/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */

just remove the '+' ?

>> +/*
>> + * Copyright (C) 2023 Nuvoton Technologies.
>> + * Author: Chi-Fen Li <cfli0@nuvoton.com>
>> + *
>> + * Device Tree binding constants for MA35D1 reset controller.
>> + */
>> +
>> +#ifndef __DT_BINDINGS_RESET_MA35D1_H
>> +#define __DT_BINDINGS_RESET_MA35D1_H
>> +
>> +#define MA35D1_RESET_CHIP	0
>> +#define MA35D1_RESET_CA35CR0	1
>> +#define MA35D1_RESET_CA35CR1	2
>> +#define MA35D1_RESET_CM4	3
>> +#define MA35D1_RESET_PDMA0	4
>> +#define MA35D1_RESET_PDMA1	5
>> +#define MA35D1_RESET_PDMA2	6
>> +#define MA35D1_RESET_PDMA3	7
>> +#define MA35D1_RESET_DISP	9
>> +#define MA35D1_RESET_VCAP0	10
>> +#define MA35D1_RESET_VCAP1	11
>> +#define MA35D1_RESET_GFX	12
>> +#define MA35D1_RESET_VDEC	13
>> +#define MA35D1_RESET_WHC0	14
>> +#define MA35D1_RESET_WHC1	15
>> +#define MA35D1_RESET_GMAC0	16
>> +#define MA35D1_RESET_GMAC1	17
>> +#define MA35D1_RESET_HWSEM	18
>> +#define MA35D1_RESET_EBI	19
>> +#define MA35D1_RESET_HSUSBH0	20
>> +#define MA35D1_RESET_HSUSBH1	21
>> +#define MA35D1_RESET_HSUSBD	22
>> +#define MA35D1_RESET_USBHL	23
>> +#define MA35D1_RESET_SDH0	24
>> +#define MA35D1_RESET_SDH1	25
>> +#define MA35D1_RESET_NAND	26
>> +#define MA35D1_RESET_GPIO	27
>> +#define MA35D1_RESET_MCTLP	28
>> +#define MA35D1_RESET_MCTLC	29
>> +#define MA35D1_RESET_DDRPUB	30
>> +#define MA35D1_RESET_TMR0	34
>> +#define MA35D1_RESET_TMR1	35
>> +#define MA35D1_RESET_TMR2	36
>> +#define MA35D1_RESET_TMR3	37
>> +#define MA35D1_RESET_I2C0	40
>> +#define MA35D1_RESET_I2C1	41
>> +#define MA35D1_RESET_I2C2	42
>> +#define MA35D1_RESET_I2C3	43
>> +#define MA35D1_RESET_QSPI0	44
>> +#define MA35D1_RESET_SPI0	45
>> +#define MA35D1_RESET_SPI1	46
>> +#define MA35D1_RESET_SPI2	47
>> +#define MA35D1_RESET_UART0	48
>> +#define MA35D1_RESET_UART1	49
>> +#define MA35D1_RESET_UART2	50
>> +#define MA35D1_RESET_UAER3	51
>> +#define MA35D1_RESET_UART4	52
>> +#define MA35D1_RESET_UART5	53
>> +#define MA35D1_RESET_UART6	54
>> +#define MA35D1_RESET_UART7	55
>> +#define MA35D1_RESET_CANFD0	56
>> +#define MA35D1_RESET_CANFD1	57
>> +#define MA35D1_RESET_EADC0	60
> Why do you have gaps here? These should be IDs, not register offsets.
>
> Best regards,
> Krzysztof
>

The reset controller registers are composed of four 32-bits register.
And the ID will be translated into the corresponding bit of these register.
Each ID is mapped to a unique bit position.


Best regards,
Jacky Huang

Re: [PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Krzysztof Kozlowski]

On 29/03/2023 11:12, Jacky Huang wrote:
>>> +        };
>>> +    };
>>> +...
>>> +
>>> diff --git a/include/dt-bindings/reset/nuvoton,ma35d1-reset.h b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>>> new file mode 100644
>>> index 000000000000..f3088bc0afec
>>> --- /dev/null
>>> +++ b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>>> @@ -0,0 +1,108 @@
>>> +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) */
>> Weird license, why 2.0+?
>>
>> You already got here comment about license in previous version of this
>> patch.
>>
> 
> In fact, I always be confused with the license.
> It should be right if I just copy one from the same directory 
> /include/dt-bindings/reset/.
> But, when I find there are several versions there, I was confused and 
> just select one of them.
> 
> /* SPDX-License-Identifier: GPL-2.0-only */
> /* SPDX-License-Identifier: GPL-2.0+ */
> /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)*/
> /* SPDX-License-Identifier: (GPL-2.0+ or MIT) */
> /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> 
> So, should I fix the license as
> 
> /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
> 
> just remove the '+' ?

The simplest is to use the same license as your binding, so
(GPL-2.0-only OR BSD-2-Clause) .

> 
>>> +/*
>>> + * Copyright (C) 2023 Nuvoton Technologies.
>>> + * Author: Chi-Fen Li <cfli0@nuvoton.com>
>>> + *
>>> + * Device Tree binding constants for MA35D1 reset controller.
>>> + */
>>> +
>>> +#ifndef __DT_BINDINGS_RESET_MA35D1_H
>>> +#define __DT_BINDINGS_RESET_MA35D1_H
>>> +
>>> +#define MA35D1_RESET_CHIP	0
>>> +#define MA35D1_RESET_CA35CR0	1
>>> +#define MA35D1_RESET_CA35CR1	2
>>> +#define MA35D1_RESET_CM4	3
>>> +#define MA35D1_RESET_PDMA0	4
>>> +#define MA35D1_RESET_PDMA1	5
>>> +#define MA35D1_RESET_PDMA2	6
>>> +#define MA35D1_RESET_PDMA3	7
>>> +#define MA35D1_RESET_DISP	9
>>> +#define MA35D1_RESET_VCAP0	10
>>> +#define MA35D1_RESET_VCAP1	11
>>> +#define MA35D1_RESET_GFX	12
>>> +#define MA35D1_RESET_VDEC	13
>>> +#define MA35D1_RESET_WHC0	14
>>> +#define MA35D1_RESET_WHC1	15
>>> +#define MA35D1_RESET_GMAC0	16
>>> +#define MA35D1_RESET_GMAC1	17
>>> +#define MA35D1_RESET_HWSEM	18
>>> +#define MA35D1_RESET_EBI	19
>>> +#define MA35D1_RESET_HSUSBH0	20
>>> +#define MA35D1_RESET_HSUSBH1	21
>>> +#define MA35D1_RESET_HSUSBD	22
>>> +#define MA35D1_RESET_USBHL	23
>>> +#define MA35D1_RESET_SDH0	24
>>> +#define MA35D1_RESET_SDH1	25
>>> +#define MA35D1_RESET_NAND	26
>>> +#define MA35D1_RESET_GPIO	27
>>> +#define MA35D1_RESET_MCTLP	28
>>> +#define MA35D1_RESET_MCTLC	29
>>> +#define MA35D1_RESET_DDRPUB	30
>>> +#define MA35D1_RESET_TMR0	34
>>> +#define MA35D1_RESET_TMR1	35
>>> +#define MA35D1_RESET_TMR2	36
>>> +#define MA35D1_RESET_TMR3	37
>>> +#define MA35D1_RESET_I2C0	40
>>> +#define MA35D1_RESET_I2C1	41
>>> +#define MA35D1_RESET_I2C2	42
>>> +#define MA35D1_RESET_I2C3	43
>>> +#define MA35D1_RESET_QSPI0	44
>>> +#define MA35D1_RESET_SPI0	45
>>> +#define MA35D1_RESET_SPI1	46
>>> +#define MA35D1_RESET_SPI2	47
>>> +#define MA35D1_RESET_UART0	48
>>> +#define MA35D1_RESET_UART1	49
>>> +#define MA35D1_RESET_UART2	50
>>> +#define MA35D1_RESET_UAER3	51
>>> +#define MA35D1_RESET_UART4	52
>>> +#define MA35D1_RESET_UART5	53
>>> +#define MA35D1_RESET_UART6	54
>>> +#define MA35D1_RESET_UART7	55
>>> +#define MA35D1_RESET_CANFD0	56
>>> +#define MA35D1_RESET_CANFD1	57
>>> +#define MA35D1_RESET_EADC0	60
>> Why do you have gaps here? These should be IDs, not register offsets.
>>
>> Best regards,
>> Krzysztof
>>
> 
> The reset controller registers are composed of four 32-bits register.
> And the ID will be translated into the corresponding bit of these register.
> Each ID is mapped to a unique bit position.

That's not the usual way. IDs start from 0 or 1 and gets incremented by
1, without gaps. Remember that IDs cannot change and your register bits
could have some changes (e.g. HW errata).


Best regards,
Krzysztof

Re: [PATCH v6 04/12] dt-bindings: reset: nuvoton: add binding for ma35d1 IP reset control

[Jacky Huang]

Dear Krzysztof,



On 2023/3/29 下午 05:27, Krzysztof Kozlowski wrote:
> On 29/03/2023 11:12, Jacky Huang wrote:
>>>> +        };
>>>> +    };
>>>> +...
>>>> +
>>>> diff --git a/include/dt-bindings/reset/nuvoton,ma35d1-reset.h b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>>>> new file mode 100644
>>>> index 000000000000..f3088bc0afec
>>>> --- /dev/null
>>>> +++ b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
>>>> @@ -0,0 +1,108 @@
>>>> +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) */
>>> Weird license, why 2.0+?
>>>
>>> You already got here comment about license in previous version of this
>>> patch.
>>>
>> In fact, I always be confused with the license.
>> It should be right if I just copy one from the same directory
>> /include/dt-bindings/reset/.
>> But, when I find there are several versions there, I was confused and
>> just select one of them.
>>
>> /* SPDX-License-Identifier: GPL-2.0-only */
>> /* SPDX-License-Identifier: GPL-2.0+ */
>> /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)*/
>> /* SPDX-License-Identifier: (GPL-2.0+ or MIT) */
>> /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
>>
>> So, should I fix the license as
>>
>> /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
>>
>> just remove the '+' ?
> The simplest is to use the same license as your binding, so
> (GPL-2.0-only OR BSD-2-Clause) .

OK, I got it. Thank you very much.

>>>> +/*
>>>> + * Copyright (C) 2023 Nuvoton Technologies.
>>>> + * Author: Chi-Fen Li <cfli0@nuvoton.com>
>>>> + *
>>>> + * Device Tree binding constants for MA35D1 reset controller.
>>>> + */
>>>> +
>>>> +#ifndef __DT_BINDINGS_RESET_MA35D1_H
>>>> +#define __DT_BINDINGS_RESET_MA35D1_H
>>>> +
>>>> +#define MA35D1_RESET_CHIP	0
>>>> +#define MA35D1_RESET_CA35CR0	1
>>>> +#define MA35D1_RESET_CA35CR1	2
>>>> +#define MA35D1_RESET_CM4	3
>>>> +#define MA35D1_RESET_PDMA0	4
>>>> +#define MA35D1_RESET_PDMA1	5
>>>> +#define MA35D1_RESET_PDMA2	6
>>>> +#define MA35D1_RESET_PDMA3	7
>>>> +#define MA35D1_RESET_DISP	9
>>>> +#define MA35D1_RESET_VCAP0	10
>>>> +#define MA35D1_RESET_VCAP1	11
>>>> +#define MA35D1_RESET_GFX	12
>>>> +#define MA35D1_RESET_VDEC	13
>>>> +#define MA35D1_RESET_WHC0	14
>>>> +#define MA35D1_RESET_WHC1	15
>>>> +#define MA35D1_RESET_GMAC0	16
>>>> +#define MA35D1_RESET_GMAC1	17
>>>> +#define MA35D1_RESET_HWSEM	18
>>>> +#define MA35D1_RESET_EBI	19
>>>> +#define MA35D1_RESET_HSUSBH0	20
>>>> +#define MA35D1_RESET_HSUSBH1	21
>>>> +#define MA35D1_RESET_HSUSBD	22
>>>> +#define MA35D1_RESET_USBHL	23
>>>> +#define MA35D1_RESET_SDH0	24
>>>> +#define MA35D1_RESET_SDH1	25
>>>> +#define MA35D1_RESET_NAND	26
>>>> +#define MA35D1_RESET_GPIO	27
>>>> +#define MA35D1_RESET_MCTLP	28
>>>> +#define MA35D1_RESET_MCTLC	29
>>>> +#define MA35D1_RESET_DDRPUB	30
>>>> +#define MA35D1_RESET_TMR0	34
>>>> +#define MA35D1_RESET_TMR1	35
>>>> +#define MA35D1_RESET_TMR2	36
>>>> +#define MA35D1_RESET_TMR3	37
>>>> +#define MA35D1_RESET_I2C0	40
>>>> +#define MA35D1_RESET_I2C1	41
>>>> +#define MA35D1_RESET_I2C2	42
>>>> +#define MA35D1_RESET_I2C3	43
>>>> +#define MA35D1_RESET_QSPI0	44
>>>> +#define MA35D1_RESET_SPI0	45
>>>> +#define MA35D1_RESET_SPI1	46
>>>> +#define MA35D1_RESET_SPI2	47
>>>> +#define MA35D1_RESET_UART0	48
>>>> +#define MA35D1_RESET_UART1	49
>>>> +#define MA35D1_RESET_UART2	50
>>>> +#define MA35D1_RESET_UAER3	51
>>>> +#define MA35D1_RESET_UART4	52
>>>> +#define MA35D1_RESET_UART5	53
>>>> +#define MA35D1_RESET_UART6	54
>>>> +#define MA35D1_RESET_UART7	55
>>>> +#define MA35D1_RESET_CANFD0	56
>>>> +#define MA35D1_RESET_CANFD1	57
>>>> +#define MA35D1_RESET_EADC0	60
>>> Why do you have gaps here? These should be IDs, not register offsets.
>>>
>>> Best regards,
>>> Krzysztof
>>>
>> The reset controller registers are composed of four 32-bits register.
>> And the ID will be translated into the corresponding bit of these register.
>> Each ID is mapped to a unique bit position.
> That's not the usual way. IDs start from 0 or 1 and gets incremented by
> 1, without gaps. Remember that IDs cannot change and your register bits
> could have some changes (e.g. HW errata).
>
>
> Best regards,
> Krzysztof
>

OK, I will modify the ID as contiguous number, and create a lookup table 
to translate
ID into bitmap.


Best Regards,
Jacky Huang

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Rob Herring]

On Mon, Mar 27, 2023 at 9:19 PM Jacky Huang <ychuang570808@gmail.com> wrote:
>
> From: Jacky Huang <ychuang3@nuvoton.com>
>
> Rename the bindings/arm/npcm directory as nuvoton.
> Add binding for ARMv8 based Nuvotn SoCs and platform boards.
> Add initial bindings for ma35d1 series development boards.
>
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> ---
>  .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
>  .../nuvoton,npcm-gcr.yaml}                    |  2 +-
>  .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
>  3 files changed, 32 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
>  rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)

Since you are moving it, this one should be moved to bindings/soc/nuvoton/

>  rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)

Re: [PATCH v6 08/12] arm64: dts: nuvoton: Add initial ma35d1 device tree

[Stephen Boyd]

Quoting Jacky Huang (2023-03-28 23:02:31)
> 
> On 2023/3/29 上午 11:54, Stephen Boyd wrote:
> > Quoting Jacky Huang (2023-03-28 20:43:23)
> >
> >> We just employ regmap mechansim for the access to REG_SYS_RLKTZNS register.
> >> Is this implementation OK for you?  Thank you.
> >>
> > No. Why can't that be a hwspinlock? Or why can't it be unlocked all the
> > time and rely on software spinlocks in the kernel to prevent concurrent
> > access to the registers accessed by a driver, like a lock for the clk
> > registers and a lock for the reset registers, etc. Or if no two clks or
> > resets exist within one 32-bit word then no lock is necessary.
> 
> You gave a good suggestion here. Yes, of course we can let it be 
> unlocked all the time.
> We can unlock the "register lock" before entering Linux.
> As a result, the unlonk and lock register related code is not required.
> Thus, we can remove syscon from the clock controller node.
> 
> If you agree with this, we will modify it in the next version.
> 

Sure, that works.

Re: [PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Krzysztof Kozlowski]

On 29/03/2023 10:44, Jacky Huang wrote:
> Dear Krzysztof,
> 
> 
> Thanks for your review.
> 
> 
> On 2023/3/29 下午 04:20, Krzysztof Kozlowski wrote:
>> On 28/03/2023 04:19, Jacky Huang wrote:
>>> From: Jacky Huang <ychuang3@nuvoton.com>
>>>
>>> Add documentation to describe nuvoton ma35d1 uart driver bindings.
>>>
>> This depends on clock patches, so it must be taken together.
>>
>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>>
>> Best regards,
>> Krzysztof
>>
> 
> OK, I will combine this patch with the clock patch.

I don't know what you mean by "combine", but I don't think this is what
we want. You must clearly state all dependencies and patch merging
strategy/way.

Best regards,
Krzysztof

Re: [PATCH v6 09/12] clk: nuvoton: Add clock driver for ma35d1 clock controller

[Jacky Huang]

Dear Stephen,


Thanks for your advice.

On 2023/3/29 上午 02:18, Stephen Boyd wrote:
> Quoting Jacky Huang (2023-03-27 19:19:09)
>> diff --git a/drivers/clk/nuvoton/Kconfig b/drivers/clk/nuvoton/Kconfig
>> new file mode 100644
>> index 000000000000..c1324efedcb9
>> --- /dev/null
>> +++ b/drivers/clk/nuvoton/Kconfig
>> @@ -0,0 +1,19 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +# common clock support for Nuvoton SoC family.
>> +
>> +config COMMON_CLK_NUVOTON
>> +       bool "Nuvoton clock controller common support"
>> +       depends on ARCH_NUVOTON
> Add || COMPILE_TEST
>
>> +       default ARCH_NUVOTON
>> +       help
>> +         Say y here to enable common clock controller for Nuvoton platforms.
>> +
>> +if COMMON_CLK_NUVOTON
> Add a newline here.
>
>> +config CLK_MA35D1
>> +       bool "Nuvoton MA35D1 clock controller support"
>> +       depends on ARM64 || COMPILE_TEST
> Drop this
>
>> +       default y
> And this.
>
>> +       help
>> +         Build the driver for MA35D1 Clock Driver.
> This says driver twice. "Build the clk driver for MA35D1 SoCs"?

I will fix all above of Kconfig file. Thank you.

>> +
>> +endif
>> diff --git a/drivers/clk/nuvoton/clk-ma35d1-divider.c b/drivers/clk/nuvoton/clk-ma35d1-divider.c
>> new file mode 100644
>> index 000000000000..340a889a1417
>> --- /dev/null
>> +++ b/drivers/clk/nuvoton/clk-ma35d1-divider.c
>> @@ -0,0 +1,140 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (C) 2023 Nuvoton Technology Corp.
>> + * Author: Chi-Fang Li <cfli0@nuvoton.com>
>> + */
>> +
>> +#include <linux/clk-provider.h>
>> +#include <linux/device.h>
>> +#include <linux/regmap.h>
>> +#include <linux/spinlock.h>
>> +
>> +#include "clk-ma35d1.h"
>> +
>> +#define clk_div_mask(width)    ((1 << (width)) - 1)
> clk-provider.h defines this already, use that?

Yes, I will remove this.

>> +
>> +struct ma35d1_adc_clk_div {
>> +       struct clk_hw hw;
>> +       void __iomem *reg;
>> +       u8 shift;
>> +       u8 width;
>> +       u32 mask;
>> +       const struct clk_div_table *table;
>> +       /* protects concurrent access to clock divider registers */
>> +       spinlock_t *lock;
>> +};
>> +
>> +static inline struct ma35d1_adc_clk_div *to_ma35d1_adc_clk_div(struct clk_hw *_hw)
>> +{
>> +       return container_of(_hw, struct ma35d1_adc_clk_div, hw);
>> +}
>> +
>> +static inline unsigned long ma35d1_clkdiv_recalc_rate(struct clk_hw *hw,
>> +                                                     unsigned long parent_rate)
>> +{
>> +       unsigned int val;
>> +       struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
>> +
>> +       val = readl_relaxed(dclk->reg) >> dclk->shift;
>> +       val &= clk_div_mask(dclk->width);
>> +       val += 1;
>> +       return divider_recalc_rate(hw, parent_rate, val, dclk->table,
>> +                                  CLK_DIVIDER_ROUND_CLOSEST, dclk->width);
>> +}
>> +
>> +static inline long ma35d1_clkdiv_round_rate(struct clk_hw *hw,
>> +                                           unsigned long rate,
>> +                                           unsigned long *prate)
>> +{
>> +       struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
>> +
>> +       return divider_round_rate(hw, rate, prate, dclk->table,
>> +                                 dclk->width, CLK_DIVIDER_ROUND_CLOSEST);
>> +}
>> +
>> +static inline int ma35d1_clkdiv_set_rate(struct clk_hw *hw,
>> +                                        unsigned long rate,
>> +                                        unsigned long parent_rate)
>> +{
>> +       int value;
>> +       unsigned long flags = 0;
>> +       u32 data;
>> +       struct ma35d1_adc_clk_div *dclk = to_ma35d1_adc_clk_div(hw);
>> +
>> +       value = divider_get_val(rate, parent_rate, dclk->table,
>> +                               dclk->width, CLK_DIVIDER_ROUND_CLOSEST);
>> +
>> +       if (dclk->lock)
>> +               spin_lock_irqsave(dclk->lock, flags);
> Can you just always lock? That makes the conditional locking go away.

OK, I will remove the "if (dclk->lock)" check.

>
>> +
>> +       data = readl_relaxed(dclk->reg);
>> +       data &= ~(clk_div_mask(dclk->width) << dclk->shift);
>> +       data |= (value - 1) << dclk->shift;
>> +       data |= dclk->mask;
>> +
>> +       writel_relaxed(data, dclk->reg);
>> +
>> +       if (dclk->lock)
>> +               spin_unlock_irqrestore(dclk->lock, flags);
>> +
>> +       return 0;
>> +}
>> +
>> +static const struct clk_ops ma35d1_adc_clkdiv_ops = {
>> +       .recalc_rate = ma35d1_clkdiv_recalc_rate,
>> +       .round_rate = ma35d1_clkdiv_round_rate,
>> +       .set_rate = ma35d1_clkdiv_set_rate,
>> +};
>> +
>> +struct clk_hw *ma35d1_reg_adc_clkdiv(struct device *dev, const char *name,
>> +                                    const char *parent_name,
>> +                                    spinlock_t *lock,
>> +                                    unsigned long flags, void __iomem *reg,
>> +                                    u8 shift, u8 width, u32 mask_bit)
>> +{
>> +       struct ma35d1_adc_clk_div *div;
>> +       struct clk_init_data init;
>> +       struct clk_div_table *table;
>> +       u32 max_div, min_div;
>> +       struct clk_hw *hw;
>> +       int ret;
>> +       int i;
>> +
>> +       div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
>> +       if (!div)
>> +               return ERR_PTR(-ENOMEM);
>> +
>> +       max_div = clk_div_mask(width) + 1;
>> +       min_div = 1;
>> +
>> +       table = devm_kcalloc(dev, max_div + 1, sizeof(*table), GFP_KERNEL);
>> +       if (!table)
>> +               return ERR_PTR(-ENOMEM);
>> +
>> +       for (i = 0; i < max_div; i++) {
>> +               table[i].val = (min_div + i);
> Drop useless parenthesis.

I will fix it.

>
>> +               table[i].div = 2 * table[i].val;
>> +       }
>> +       table[max_div].val = 0;
>> +       table[max_div].div = 0;
>> +
>> +       init.name = name;
>> +       init.ops = &ma35d1_adc_clkdiv_ops;
>> +       init.flags |= flags;
>> +       init.parent_names = parent_name ? &parent_name : NULL;
>> +       init.num_parents = parent_name ? 1 : 0;
>> +
>> +       div->reg = reg;
>> +       div->shift = shift;
>> +       div->width = width;
>> +       div->mask = mask_bit ? BIT(mask_bit) : 0;
>> +       div->lock = lock;
>> +       div->hw.init = &init;
>> +       div->table = table;
>> +
>> +       hw = &div->hw;
>> +       ret = devm_clk_hw_register(dev, hw);
>> +       if (ret < 0)
> Use if (ret) instead.

I will fix it.

>
>> +               return ERR_PTR(ret);
>> +       return hw;
>> +}
>> diff --git a/drivers/clk/nuvoton/clk-ma35d1-pll.c b/drivers/clk/nuvoton/clk-ma35d1-pll.c
>> new file mode 100644
>> index 000000000000..b36fbda4fa0a
>> --- /dev/null
>> +++ b/drivers/clk/nuvoton/clk-ma35d1-pll.c
>> @@ -0,0 +1,350 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (C) 2023 Nuvoton Technology Corp.
>> + * Author: Chi-Fang Li <cfli0@nuvoton.com>
>> + */
>> +
>> +#include <linux/bitfield.h>
>> +#include <linux/clk-provider.h>
>> +#include <linux/slab.h>
>> +#include <linux/regmap.h>
>> +
>> +#include "clk-ma35d1.h"
>> +
>> +#define REG_SYS_RLKTZNS                0x1a4 /* Register Lock Control */
>> +
>> +struct ma35d1_clk_pll {
>> +       struct clk_hw hw;
>> +       u8 type;
>> +       u8 mode;
>> +       unsigned long rate;
>> +       void __iomem *ctl0_base;
> This needs an include for __iomem define. Just include kernel.h for now.

OK, I will add it.

>> +       void __iomem *ctl1_base;
>> +       void __iomem *ctl2_base;
>> +       struct regmap *regmap;
>> +};
>> +
>> +static inline struct ma35d1_clk_pll *to_ma35d1_clk_pll(struct clk_hw *_hw)
>> +{
>> +       return container_of(_hw, struct ma35d1_clk_pll, hw);
> Missing include as well.

I will add the
#include <linux/container_of.h>

>
>> +}
>> +
>> +static void ma35d1_unlock_regs(struct ma35d1_clk_pll *pll)
>> +{
>> +       int ret;
>> +
>> +       do {
>> +               regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x59);
>> +               regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x16);
>> +               regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x88);
>> +               regmap_read(pll->regmap, REG_SYS_RLKTZNS, &ret);
>> +       } while (ret == 0);
> Any sort of timeout?

As we have discussed in [PATCH v6 08/12] of this patchset, we will 
remove the register lock.
So, this function will be removed in the next version.

>> +}
>> +
>> +static void ma35d1_lock_regs(struct ma35d1_clk_pll *pll)
>> +{
>> +       regmap_write(pll->regmap, REG_SYS_RLKTZNS, 0x0);
>> +}
>> +
>> +static unsigned long ma35d1_calc_smic_pll_freq(u32 pll0_ctl0,
>> +                                              unsigned long parent_rate)
>> +{
>> +       u32 m, n, p, outdiv;
>> +       u64 pll_freq;
>> +       u32 clk_div_table[] = { 1, 2, 4, 8 };
> const

OK, I will add const to the clk_div_table[].
>
>> +
>> +       if (pll0_ctl0 & SPLL0_CTL0_BP)
>> +               return parent_rate;
>> +
>> +       n = FIELD_GET(SPLL0_CTL0_FBDIV, pll0_ctl0);
>> +       m = FIELD_GET(SPLL0_CTL0_INDIV, pll0_ctl0);
>> +       p = FIELD_GET(SPLL0_CTL0_OUTDIV, pll0_ctl0);
>> +       outdiv = clk_div_table[p];
>> +       pll_freq = (u64)parent_rate * n;
>> +       do_div(pll_freq, m * outdiv);
>> +       return (unsigned long)pll_freq;
> Remove useless cast.

I will fix it.

>> +}
>> +
>> +static unsigned long ma35d1_calc_pll_freq(u8 mode, u32 *reg_ctl,
>> +                                         unsigned long parent_rate)
>> +{
>> +       u32 m, n, p;
>> +       u64 pll_freq, x;
>> +
>> +       if (reg_ctl[1] & PLL_CTL1_BP)
>> +               return parent_rate;
>> +
>> +       if (mode == PLL_MODE_INT) {
>> +               n = FIELD_GET(PLL_CTL0_FBDIV, reg_ctl[0]);
>> +               m = FIELD_GET(PLL_CTL0_INDIV, reg_ctl[0]);
>> +               p = FIELD_GET(PLL_CTL1_OUTDIV, reg_ctl[1]);
>> +               pll_freq = (u64)parent_rate * n;
>> +               do_div(pll_freq, m * p);
>> +       } else {
>> +               n = FIELD_GET(PLL_CTL0_FBDIV, reg_ctl[0]);
>> +               m = FIELD_GET(PLL_CTL0_INDIV, reg_ctl[0]);
>> +               p = FIELD_GET(PLL_CTL1_OUTDIV, reg_ctl[1]);
> The n, m, p are the same, so pull them out of the if-else to deduplicate.

Ok, I will modify it.

>
>> +               x = FIELD_GET(PLL_CTL1_FRAC, reg_ctl[1]);
>> +               /* 2 decimal places floating to integer (ex. 1.23 to 123) */
>> +               n = n * 100 + ((x * 100) / FIELD_MAX(PLL_CTL1_FRAC));
> Is this mult_frac()?

Not exactly. The number is represented as n.x.
Suppose the number is 123.45, then n is 123 and x is 45.
We have it be multiplied with 100 to be integer 12345, which is n.

In the following
pll_freq = ((u64)parent_rate * n) / 100 / m / p;

We can keep precision of n.

It seems not applicable to mult_frac().

>
>> +               pll_freq = ((u64)parent_rate * n) / 100 / m / p;
>> +       }
> Add a newline
>
>> +       return (unsigned long)pll_freq;
> Remove useless cast.

I will fix them.

>> +}
>> +
>> +static int ma35d1_pll_find_closest(struct ma35d1_clk_pll *pll,
>> +                                  unsigned long rate,
>> +                                  unsigned long parent_rate,
>> +                                  u32 *reg_ctl, unsigned long *freq)
>> +{
>> +       int p, m, n;
>> +       int fbdiv_min, fbdiv_max;
>> +       unsigned long diff = 0xffffffff;
>> +
>> +       *freq = 0;
>> +       if ((rate < PLL_FCLKO_MIN_FREQ) || (rate > PLL_FCLKO_MAX_FREQ))
>> +               return -EINVAL;
>> +
>> +       if (pll->mode == PLL_MODE_INT) {
>> +               fbdiv_min = FBDIV_MIN;
>> +               fbdiv_max = FBDIV_MAX;
>> +       } else {
>> +               fbdiv_min = FBDIV_FRAC_MIN;
>> +               fbdiv_max = FBDIV_FRAC_MAX;
>> +       }
>> +
>> +       for (m = INDIV_MIN; m <= INDIV_MAX; m++) {
>> +               for (n = fbdiv_min; n <= fbdiv_max; n++) {
>> +                       for (p = OUTDIV_MIN; p <= OUTDIV_MAX; p++) {
>> +                               unsigned long tmp, fout;
>> +                               u64 fclk;
>> +
>> +                               tmp = parent_rate / m;
>> +                               if (tmp < PLL_FREF_M_MIN_FREQ ||
>> +                                   tmp > PLL_FREF_M_MAX_FREQ)
>> +                                       continue; /* constrain */
>> +
>> +                               fclk = (u64)parent_rate * n / m;
>> +                               /* for 2 decimal places */
>> +                               if (pll->mode != PLL_MODE_INT)
>> +                                       fclk /= 100;
>> +
>> +                               if (fclk < PLL_FCLK_MIN_FREQ ||
>> +                                   fclk > PLL_FCLK_MAX_FREQ)
>> +                                       continue; /* constrain */
>> +
>> +                               fout = (unsigned long)(fclk / p);
>> +                               if (fout < PLL_FCLKO_MIN_FREQ ||
>> +                                   fout > PLL_FCLKO_MAX_FREQ)
>> +                                       continue; /* constrain */
>> +
>> +                               if (abs(rate - fout) < diff) {
>> +                                       reg_ctl[0] = FIELD_PREP(PLL_CTL0_INDIV, m) |
>> +                                                    FIELD_PREP(PLL_CTL0_FBDIV, n);
>> +                                       reg_ctl[1] = FIELD_PREP(PLL_CTL1_OUTDIV, p);
>> +                                       *freq = fout;
>> +                                       diff = abs(rate - fout);
>> +                                       if (diff == 0)
>> +                                               break;
>> +                               }
>> +                       }
>> +               }
>> +       }
>> +       if (*freq == 0)
>> +               return -EINVAL; /* cannot find even one valid setting */
>> +       return 0;
>> +}
>> +
>> +static int ma35d1_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
>> +                                  unsigned long parent_rate)
>> +{
>> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
>> +       u32 reg_ctl[3] = { 0 };
>> +       unsigned long pll_freq;
>> +       int ret;
>> +
>> +       if ((parent_rate < PLL_FREF_MIN_FREQ) ||
>> +           (parent_rate > PLL_FREF_MAX_FREQ))
> Remove useless parenthesis.
>
>> +               return -EINVAL;
>> +
>> +       if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {
> Remove useless parenthesis.

I will fix them.

>> +               pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
>> +               return -EACCES;
>> +       }
>> +
>> +       ret = ma35d1_pll_find_closest(pll, rate, parent_rate, reg_ctl, &pll_freq);
>> +       if (ret != 0)
>> +               return ret;
>> +       pll->rate = pll_freq;
>> +
>> +       switch (pll->mode) {
>> +       case PLL_MODE_INT:
>> +               reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_INT);
>> +               break;
>> +       case PLL_MODE_FRAC:
>> +               reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_FRAC);
>> +               break;
>> +       case PLL_MODE_SS:
>> +               reg_ctl[0] |= FIELD_PREP(PLL_CTL0_MODE, PLL_MODE_SS) |
>> +                             FIELD_PREP(PLL_CTL0_SSRATE, PLL_SS_RATE);
>> +               reg_ctl[2] = FIELD_PREP(PLL_CTL2_SLOPE, PLL_SLOPE);
>> +               break;
>> +       }
>> +       reg_ctl[1] |= PLL_CTL1_PD;
>> +
>> +       ma35d1_unlock_regs(pll);
>> +       writel_relaxed(reg_ctl[0], pll->ctl0_base);
>> +       writel_relaxed(reg_ctl[1], pll->ctl1_base);
>> +       writel_relaxed(reg_ctl[2], pll->ctl2_base);
>> +       ma35d1_lock_regs(pll);
>> +       return 0;
>> +}
>> +
>> +static unsigned long ma35d1_clk_pll_recalc_rate(struct clk_hw *hw,
>> +                                               unsigned long parent_rate)
>> +{
>> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
>> +       u32 reg_ctl[3];
>> +       unsigned long pll_freq;
>> +
>> +       if ((parent_rate < PLL_FREF_MIN_FREQ) || (parent_rate > PLL_FREF_MAX_FREQ))
> Remove useless parenthesis.

I will fix it.

>
>> +               return 0;
>> +
>> +       switch (pll->type) {
>> +       case MA35D1_CAPLL:
>> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
>> +               pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], parent_rate);
> return?

Yes, I will have it return here.

>> +               break;
>> +       case MA35D1_DDRPLL:
>> +       case MA35D1_APLL:
>> +       case MA35D1_EPLL:
>> +       case MA35D1_VPLL:
>> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
>> +               reg_ctl[1] = readl_relaxed(pll->ctl1_base);
>> +               pll_freq = ma35d1_calc_pll_freq(pll->mode, reg_ctl, parent_rate);
> return?
>
>> +               break;
>> +       }
>> +       return pll_freq;
> return 0?

Yes, I will fix them.

>
>> +}
>> +
>> +static long ma35d1_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
>> +                                     unsigned long *parent_rate)
>> +{
>> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
>> +       u32 reg_ctl[3] = { 0 };
>> +       unsigned long pll_freq;
>> +       long ret;
>> +
>> +       if (*parent_rate < PLL_FREF_MIN_FREQ || *parent_rate > PLL_FREF_MAX_FREQ)
>> +               return -EINVAL;
>> +
>> +       ret = ma35d1_pll_find_closest(pll, rate, *parent_rate, reg_ctl, &pll_freq);
>> +       if (ret != 0)
>> +               return ret;
>> +
>> +       switch (pll->type) {
>> +       case MA35D1_CAPLL:
>> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
>> +               pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], *parent_rate);
> return?
>
>> +               break;
>> +       case MA35D1_DDRPLL:
>> +       case MA35D1_APLL:
>> +       case MA35D1_EPLL:
>> +       case MA35D1_VPLL:
>> +               reg_ctl[0] = readl_relaxed(pll->ctl0_base);
>> +               reg_ctl[1] = readl_relaxed(pll->ctl1_base);
>> +               pll_freq = ma35d1_calc_pll_freq(pll->mode, reg_ctl, *parent_rate);
> return?
>
>> +               break;
>> +       }
>> +       return pll_freq;
> return 0?

Yes, I will fix them.

>> +}
>> +
>> +static int ma35d1_clk_pll_is_prepared(struct clk_hw *hw)
>> +{
>> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
>> +       u32 val = readl_relaxed(pll->ctl1_base);
>> +
>> +       return val & PLL_CTL1_PD ? 0 : 1;
>> +}
>> +
>> +static int ma35d1_clk_pll_prepare(struct clk_hw *hw)
>> +{
>> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
>> +       u32 val;
>> +
>> +       if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {
> Drop useless parenthesis.

I will fix it.

>
>> +               pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
>> +               return -EACCES;
>> +       }
>> +
>> +       ma35d1_unlock_regs(pll);
>> +       val = readl_relaxed(pll->ctl1_base);
>> +       val &= ~PLL_CTL1_PD;
>> +       writel_relaxed(val, pll->ctl1_base);
>> +       ma35d1_lock_regs(pll);
>> +       return 0;
>> +}
>> +
>> +static void ma35d1_clk_pll_unprepare(struct clk_hw *hw)
>> +{
>> +       struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
>> +       u32 val;
>> +
>> +       if ((pll->type == MA35D1_CAPLL) || (pll->type == MA35D1_DDRPLL)) {
> Drop useless parenthesis.

I will fix it.

>
>> +               pr_warn("Nuvoton MA35D1 CAPLL/DDRPLL is read only.\n");
> These read-only checks should be removed and different clk_ops should be
> assigned for the read-only type of clks.

OK, I will fix it.

>> +       } else {
>> +               val = readl_relaxed(pll->ctl1_base);
>> +               val |= PLL_CTL1_PD;
>> +               writel_relaxed(val, pll->ctl1_base);
>> +       }
>> +}
>> +
>> +static const struct clk_ops ma35d1_clk_pll_ops = {
>> +       .is_prepared = ma35d1_clk_pll_is_prepared,
>> +       .prepare = ma35d1_clk_pll_prepare,
>> +       .unprepare = ma35d1_clk_pll_unprepare,
>> +       .set_rate = ma35d1_clk_pll_set_rate,
>> +       .recalc_rate = ma35d1_clk_pll_recalc_rate,
>> +       .round_rate = ma35d1_clk_pll_round_rate,
>> +};
>> +
>> +struct clk_hw *ma35d1_reg_clk_pll(enum ma35d1_pll_type type,
> Pass a device here.

OK, I will add it.

>> +                                 u8 u8mode, const char *name,
>> +                                 const char *parent,
>> +                                 unsigned long targetFreq,
>> +                                 void __iomem *base,
>> +                                 struct regmap *regmap)
>> +{
>> +       struct ma35d1_clk_pll *pll;
>> +       struct clk_hw *hw;
>> +       struct clk_init_data init;
> init = {};
>
>> +       int ret;
>> +
>> +       pll = kmalloc(sizeof(*pll), GFP_KERNEL);
> Just use kzalloc(). This isn't a hot path.

I will use devm_kzalloc().

>> +       if (!pll)
>> +               return ERR_PTR(-ENOMEM);
>> +
>> +       pll->type = type;
>> +       pll->mode = u8mode;
>> +       pll->rate = targetFreq;
>> +       pll->ctl0_base = base + REG_PLL_CTL0_OFFSET;
>> +       pll->ctl1_base = base + REG_PLL_CTL1_OFFSET;
>> +       pll->ctl2_base = base + REG_PLL_CTL2_OFFSET;
>> +       pll->regmap = regmap;
>> +
>> +       init.name = name;
>> +       init.flags = 0;
>> +       init.parent_names = &parent;
>> +       init.num_parents = 1;
>> +       init.ops = &ma35d1_clk_pll_ops;
>> +       pll->hw.init = &init;
>> +       hw = &pll->hw;
>> +
>> +       ret = clk_hw_register(NULL, hw);
> Use devm_

OK, I will fix it.

>
>> +       if (ret) {
>> +               pr_err("failed to register vsi-pll clock!!!\n");
> I'm going to put a dev_err_probe() into clk registration code. Remove
> this printk.

OK, I will remove it.

>> +               kfree(pll);
>> +               return ERR_PTR(ret);
>> +       }
>> +       return hw;
>> +}
>> diff --git a/drivers/clk/nuvoton/clk-ma35d1.c b/drivers/clk/nuvoton/clk-ma35d1.c
>> new file mode 100644
>> index 000000000000..e4d3ced396a3
>> --- /dev/null
>> +++ b/drivers/clk/nuvoton/clk-ma35d1.c
>> @@ -0,0 +1,963 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (C) 2023 Nuvoton Technology Corp.
>> + * Author: Chi-Fang Li <cfli0@nuvoton.com>
>> + */
>> +
>> +#include <linux/clk-provider.h>
>> +#include <linux/mfd/syscon.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/spinlock.h>
>> +#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
>> +
>> +#include "clk-ma35d1.h"
>> +
>> +static DEFINE_SPINLOCK(ma35d1_lock);
>> +
>> +static const char *const ca35clk_sel_clks[] = {
> Use clk_parent_data instead.

I will fix it.

>
>> +       "hxt", "capll", "ddrpll", "dummy"
>> +};
>> +
> [...]
>> +
>> +static inline struct clk_hw *ma35d1_clk_fixed(const char *name, int rate)
>> +{
>> +       return clk_hw_register_fixed_rate(NULL, name, NULL, 0, rate);
>> +}
>> +
>> +static inline struct clk_hw *ma35d1_clk_mux(const char *name,
>> +                                           void __iomem *reg,
>> +                                           u8 shift, u8 width,
>> +                                           const char *const *parents,
>> +                                           int num_parents)
>> +{
>> +       return clk_hw_register_mux(NULL, name, parents, num_parents,
>> +                                  CLK_SET_RATE_NO_REPARENT, reg, shift,
>> +                                  width, 0, &ma35d1_lock);
>> +}
>> +
>> +static inline struct clk_hw *ma35d1_clk_divider(const char *name,
>> +                                               const char *parent,
>> +                                               void __iomem *reg, u8 shift,
>> +                                               u8 width)
>> +{
>> +       return clk_hw_register_divider(NULL, name, parent, CLK_SET_RATE_PARENT,
>> +                                      reg, shift, width, 0, &ma35d1_lock);
>> +}
>> +
>> +static inline struct clk_hw *ma35d1_clk_divider_pow2(const char *name,
>> +                                                    const char *parent,
>> +                                                    void __iomem *reg,
>> +                                                    u8 shift, u8 width)
>> +{
>> +       return clk_hw_register_divider(NULL, name, parent,
>> +                                      CLK_DIVIDER_POWER_OF_TWO, reg, shift,
>> +                                      width, 0, &ma35d1_lock);
>> +}
>> +
>> +static inline struct clk_hw *ma35d1_clk_divider_table(const char *name,
>> +                                       const char *parent,
>> +                                       void __iomem *reg,
>> +                                       u8 shift, u8 width,
>> +                                       const struct clk_div_table *table)
>> +{
>> +       return clk_hw_register_divider_table(NULL, name, parent, 0,
>> +                                            reg, shift, width, 0, table,
>> +                                            &ma35d1_lock);
>> +}
>> +
>> +static inline struct clk_hw *ma35d1_clk_fixed_factor(const char *name,
>> +                                                    const char *parent,
>> +                                                    unsigned int mult,
>> +                                                    unsigned int div)
>> +{
>> +       return clk_hw_register_fixed_factor(NULL, name, parent,
>> +                                           CLK_SET_RATE_PARENT, mult, div);
>> +}
>> +
>> +static inline struct clk_hw *ma35d1_clk_gate(const char *name,
>> +                                            const char *parent,
>> +                                            void __iomem *reg, u8 shift)
>> +{
>> +       return clk_hw_register_gate(NULL, name, parent, CLK_SET_RATE_PARENT,
>> +                                   reg, shift, 0, &ma35d1_lock);
>> +}
> These need to use devm_ to unregister on failure.

OK, I will fix them all.

>> +
>> +static int ma35d1_get_pll_setting(struct device_node *clk_node,
>> +                                 u32 *pllmode, u32 *pllfreq)
>> +{
>> +       const char *of_str;
>> +       int i;
>> +
>> +       for (i = 0; i < PLL_MAX_NUM; i++) {
>> +               if (of_property_read_string_index(clk_node, "nuvoton,pll-mode", i, &of_str))
>> +                       return -EINVAL;
>> +               if (!strcmp(of_str, "integer"))
>> +                       pllmode[i] = PLL_MODE_INT;
>> +               else if (!strcmp(of_str, "fractional"))
>> +                       pllmode[i] = PLL_MODE_FRAC;
>> +               else if (!strcmp(of_str, "spread-spectrum"))
>> +                       pllmode[i] = PLL_MODE_SS;
>> +               else
>> +                       return -EINVAL;
>> +       }
>> +       return of_property_read_u32_array(clk_node, "assigned-clock-rates",
> The clk framework looks at this property. Why is the driver looking at
> it too?

We should not use "assigned-clock-rates", instead we should create a
vendor-specific property to describe the pll frequency array.

I will fix it in the next version.


>> +                                         pllfreq, PLL_MAX_NUM);
>> +}
>> +


Best regards,
Jacky Huang

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Jacky Huang]

Dear Rob,


On 2023/3/29 下午 09:07, Rob Herring wrote:
> On Mon, Mar 27, 2023 at 9:19 PM Jacky Huang <ychuang570808@gmail.com> wrote:
>> From: Jacky Huang <ychuang3@nuvoton.com>
>>
>> Rename the bindings/arm/npcm directory as nuvoton.
>> Add binding for ARMv8 based Nuvotn SoCs and platform boards.
>> Add initial bindings for ma35d1 series development boards.
>>
>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>> ---
>>   .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
>>   .../nuvoton,npcm-gcr.yaml}                    |  2 +-
>>   .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
>>   3 files changed, 32 insertions(+), 2 deletions(-)
>>   create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
>>   rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
> Since you are moving it, this one should be moved to bindings/soc/nuvoton/
>
>>   rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)

OK, I will move "Documentation/devicetree/bindings/arm/npcm" to
"Documentation/devicetree/bindings/soc/nuvoton".


Best regards,
Jacky Huang

Re: [PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Jacky Huang]

On 2023/3/30 下午 03:33, Krzysztof Kozlowski wrote:
> On 29/03/2023 10:44, Jacky Huang wrote:
>> Dear Krzysztof,
>>
>>
>> Thanks for your review.
>>
>>
>> On 2023/3/29 下午 04:20, Krzysztof Kozlowski wrote:
>>> On 28/03/2023 04:19, Jacky Huang wrote:
>>>> From: Jacky Huang <ychuang3@nuvoton.com>
>>>>
>>>> Add documentation to describe nuvoton ma35d1 uart driver bindings.
>>>>
>>> This depends on clock patches, so it must be taken together.
>>>
>>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>>>
>>> Best regards,
>>> Krzysztof
>>>
>> OK, I will combine this patch with the clock patch.
> I don't know what you mean by "combine", but I don't think this is what
> we want. You must clearly state all dependencies and patch merging
> strategy/way.
>
> Best regards,
> Krzysztof
>

Dear Krzysztof,


I may be misunderstanding your request.
I thought it was moving the "nuvoton,ma35d1-serial.yaml" to the patch of 
nuvoton,ma35d1-clk.h.
Would you please provide guidance what should I do next on this [PATCH 
v6 07/12]. Thank you.


Best regards,
Jacky Huang

Re: [PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Rob Herring]

On Thu, Mar 30, 2023 at 06:52:11PM +0800, Jacky Huang wrote:
> 
> 
> On 2023/3/30 下午 03:33, Krzysztof Kozlowski wrote:
> > On 29/03/2023 10:44, Jacky Huang wrote:
> > > Dear Krzysztof,
> > > 
> > > 
> > > Thanks for your review.
> > > 
> > > 
> > > On 2023/3/29 下午 04:20, Krzysztof Kozlowski wrote:
> > > > On 28/03/2023 04:19, Jacky Huang wrote:
> > > > > From: Jacky Huang <ychuang3@nuvoton.com>
> > > > > 
> > > > > Add documentation to describe nuvoton ma35d1 uart driver bindings.
> > > > > 
> > > > This depends on clock patches, so it must be taken together.
> > > > 
> > > > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> > > > 
> > > > Best regards,
> > > > Krzysztof
> > > > 
> > > OK, I will combine this patch with the clock patch.
> > I don't know what you mean by "combine", but I don't think this is what
> > we want. You must clearly state all dependencies and patch merging
> > strategy/way.
> > 
> > Best regards,
> > Krzysztof
> > 
> 
> Dear Krzysztof,
> 
> 
> I may be misunderstanding your request.
> I thought it was moving the "nuvoton,ma35d1-serial.yaml" to the patch of
> nuvoton,ma35d1-clk.h.
> Would you please provide guidance what should I do next on this [PATCH v6
> 07/12]. Thank you.

The only combining you should do is putting the 2 patches in the same 
series. Combining to 1 patch would be wrong.

Your other option is just drop the header in the example and use the 
raw numbers. Then there is no dependency to manage and each subsystem 
maintainer can take the relevant patches.

Rob

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Krzysztof Kozlowski]

On 30/03/2023 12:41, Jacky Huang wrote:
> Dear Rob,
> 
> 
> On 2023/3/29 下午 09:07, Rob Herring wrote:
>> On Mon, Mar 27, 2023 at 9:19 PM Jacky Huang <ychuang570808@gmail.com> wrote:
>>> From: Jacky Huang <ychuang3@nuvoton.com>
>>>
>>> Rename the bindings/arm/npcm directory as nuvoton.
>>> Add binding for ARMv8 based Nuvotn SoCs and platform boards.
>>> Add initial bindings for ma35d1 series development boards.
>>>
>>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>>> ---
>>>   .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
>>>   .../nuvoton,npcm-gcr.yaml}                    |  2 +-
>>>   .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
>>>   3 files changed, 32 insertions(+), 2 deletions(-)
>>>   create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
>>>   rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
>> Since you are moving it, this one should be moved to bindings/soc/nuvoton/
>>
>>>   rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)
> 
> OK, I will move "Documentation/devicetree/bindings/arm/npcm" to
> "Documentation/devicetree/bindings/soc/nuvoton".

To clarify - Rob asked *this one*. Not all.



Best regards,
Krzysztof

Re: [PATCH v6 11/12] tty: serial: Add Nuvoton ma35d1 serial driver support

[kernel test robot]

Hi Jacky,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on clk/clk-next linus/master]
[cannot apply to pza/reset/next pza/imx-drm/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jacky-Huang/arm64-Kconfig-platforms-Add-config-for-Nuvoton-MA35-platform/20230328-102245
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20230328021912.177301-12-ychuang570808%40gmail.com
patch subject: [PATCH v6 11/12] tty: serial: Add Nuvoton ma35d1 serial driver support
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20230331/202303310829.6uVozWbB-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/380d83a62e873855024ca4c660865c654a62748a
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jacky-Huang/arm64-Kconfig-platforms-Add-config-for-Nuvoton-MA35-platform/20230328-102245
        git checkout 380d83a62e873855024ca4c660865c654a62748a
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/tty/serial/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303310829.6uVozWbB-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/tty/serial/ma35d1_serial.c:672:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (pdev->dev.of_node) {
               ^~~~~~~~~~~~~~~~~
   drivers/tty/serial/ma35d1_serial.c:679:27: note: uninitialized use occurs here
           up = &ma35d1serial_ports[ret];
                                    ^~~
   drivers/tty/serial/ma35d1_serial.c:672:2: note: remove the 'if' if its condition is always true
           if (pdev->dev.of_node) {
           ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/ma35d1_serial.c:668:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
>> drivers/tty/serial/ma35d1_serial.c:730:6: warning: variable 'i' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (dev->dev.of_node)
               ^~~~~~~~~~~~~~~~
   drivers/tty/serial/ma35d1_serial.c:732:6: note: uninitialized use occurs here
           if (i < 0) {
               ^
   drivers/tty/serial/ma35d1_serial.c:730:2: note: remove the 'if' if its condition is always true
           if (dev->dev.of_node)
           ^~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/ma35d1_serial.c:727:7: note: initialize the variable 'i' to silence this warning
           int i;
                ^
                 = 0
   drivers/tty/serial/ma35d1_serial.c:750:6: warning: variable 'i' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (dev->dev.of_node)
               ^~~~~~~~~~~~~~~~
   drivers/tty/serial/ma35d1_serial.c:752:6: note: uninitialized use occurs here
           if (i < 0) {
               ^
   drivers/tty/serial/ma35d1_serial.c:750:2: note: remove the 'if' if its condition is always true
           if (dev->dev.of_node)
           ^~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/ma35d1_serial.c:747:7: note: initialize the variable 'i' to silence this warning
           int i;
                ^
                 = 0
   3 warnings generated.


vim +672 drivers/tty/serial/ma35d1_serial.c

   658	
   659	/*
   660	 * Register a set of serial devices attached to a platform device.
   661	 * The list is terminated with a zero flags entry, which means we expect
   662	 * all entries to have at least UPF_BOOT_AUTOCONF set.
   663	 */
   664	static int ma35d1serial_probe(struct platform_device *pdev)
   665	{
   666		struct resource *res_mem;
   667		struct uart_ma35d1_port *up;
   668		int ret;
   669		struct clk *clk;
   670		int err;
   671	
 > 672		if (pdev->dev.of_node) {
   673			ret = of_alias_get_id(pdev->dev.of_node, "serial");
   674			if (ret < 0) {
   675				dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n", ret);
   676				return ret;
   677			}
   678		}
   679		up = &ma35d1serial_ports[ret];
   680		up->port.line = ret;
   681		res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   682		if (!res_mem)
   683			return -ENODEV;
   684	
   685		up->port.iobase = res_mem->start;
   686		up->port.membase = ioremap(up->port.iobase, UART_REG_SIZE);
   687		up->port.ops = &ma35d1serial_ops;
   688	
   689		spin_lock_init(&up->port.lock);
   690	
   691		clk = of_clk_get(pdev->dev.of_node, 0);
   692		if (IS_ERR(clk)) {
   693			err = PTR_ERR(clk);
   694			dev_err(&pdev->dev, "failed to get core clk: %d\n", err);
   695			return -ENOENT;
   696		}
   697		err = clk_prepare_enable(clk);
   698		if (err)
   699			return -ENOENT;
   700	
   701		if (up->port.line != 0)
   702			up->port.uartclk = clk_get_rate(clk);
   703		up->port.irq = platform_get_irq(pdev, 0);
   704		up->port.dev = &pdev->dev;
   705		up->port.flags = UPF_BOOT_AUTOCONF;
   706		ret = uart_add_one_port(&ma35d1serial_reg, &up->port);
   707		platform_set_drvdata(pdev, up);
   708		return 0;
   709	}
   710	
   711	/*
   712	 * Remove serial ports registered against a platform device.
   713	 */
   714	static int ma35d1serial_remove(struct platform_device *dev)
   715	{
   716		struct uart_port *port = platform_get_drvdata(dev);
   717	
   718		if (port) {
   719			uart_remove_one_port(&ma35d1serial_reg, port);
   720			free_irq(port->irq, port);
   721		}
   722		return 0;
   723	}
   724	
   725	static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
   726	{
   727		int i;
   728		struct uart_ma35d1_port *up;
   729	
 > 730		if (dev->dev.of_node)
   731			i = of_alias_get_id(dev->dev.of_node, "serial");
   732		if (i < 0) {
   733			dev_err(&dev->dev, "failed to get alias/pdev id, errno %d\n", i);
   734			return i;
   735		}
   736		up = &ma35d1serial_ports[i];
   737		if (i == 0) {
   738			up->console_baud_rate = serial_in(up, UART_REG_BAUD);
   739			up->console_line = serial_in(up, UART_REG_LCR);
   740			up->console_int = serial_in(up, UART_REG_IER);
   741		}
   742		return 0;
   743	}
   744	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

Re: [PATCH v6 07/12] dt-bindings: serial: Document ma35d1 uart controller

[Jacky Huang]

On 2023/3/30 下午 09:12, Rob Herring wrote:
> On Thu, Mar 30, 2023 at 06:52:11PM +0800, Jacky Huang wrote:
>>
>> On 2023/3/30 下午 03:33, Krzysztof Kozlowski wrote:
>>> On 29/03/2023 10:44, Jacky Huang wrote:
>>>> Dear Krzysztof,
>>>>
>>>>
>>>> Thanks for your review.
>>>>
>>>>
>>>> On 2023/3/29 下午 04:20, Krzysztof Kozlowski wrote:
>>>>> On 28/03/2023 04:19, Jacky Huang wrote:
>>>>>> From: Jacky Huang <ychuang3@nuvoton.com>
>>>>>>
>>>>>> Add documentation to describe nuvoton ma35d1 uart driver bindings.
>>>>>>
>>>>> This depends on clock patches, so it must be taken together.
>>>>>
>>>>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>>>>>
>>>>> Best regards,
>>>>> Krzysztof
>>>>>
>>>> OK, I will combine this patch with the clock patch.
>>> I don't know what you mean by "combine", but I don't think this is what
>>> we want. You must clearly state all dependencies and patch merging
>>> strategy/way.
>>>
>>> Best regards,
>>> Krzysztof
>>>
>> Dear Krzysztof,
>>
>>
>> I may be misunderstanding your request.
>> I thought it was moving the "nuvoton,ma35d1-serial.yaml" to the patch of
>> nuvoton,ma35d1-clk.h.
>> Would you please provide guidance what should I do next on this [PATCH v6
>> 07/12]. Thank you.
> The only combining you should do is putting the 2 patches in the same
> series. Combining to 1 patch would be wrong.
>
> Your other option is just drop the header in the example and use the
> raw numbers. Then there is no dependency to manage and each subsystem
> maintainer can take the relevant patches.
>
> Rob

Dear Rob,

Thanks for your detailed explanation. I got it now.


Best regards,
Jacky Huang

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Jacky Huang]

On 2023/3/30 下午 09:25, Krzysztof Kozlowski wrote:
> On 30/03/2023 12:41, Jacky Huang wrote:
>> Dear Rob,
>>
>>
>> On 2023/3/29 下午 09:07, Rob Herring wrote:
>>> On Mon, Mar 27, 2023 at 9:19 PM Jacky Huang <ychuang570808@gmail.com> wrote:
>>>> From: Jacky Huang <ychuang3@nuvoton.com>
>>>>
>>>> Rename the bindings/arm/npcm directory as nuvoton.
>>>> Add binding for ARMv8 based Nuvotn SoCs and platform boards.
>>>> Add initial bindings for ma35d1 series development boards.
>>>>
>>>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>>>> ---
>>>>    .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
>>>>    .../nuvoton,npcm-gcr.yaml}                    |  2 +-
>>>>    .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
>>>>    3 files changed, 32 insertions(+), 2 deletions(-)
>>>>    create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
>>>>    rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
>>> Since you are moving it, this one should be moved to bindings/soc/nuvoton/
>>>
>>>>    rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)
>> OK, I will move "Documentation/devicetree/bindings/arm/npcm" to
>> "Documentation/devicetree/bindings/soc/nuvoton".
> To clarify - Rob asked *this one*. Not all.
>
>
>
> Best regards,
> Krzysztof
>

Dear Krzysztof,

I am sorry that still cannot get it exactly.

1. Just only submit  the nuvoton,ma35d1.yaml to
Documentation/devicetree/bindings/soc/nuvoton/nuvoton,ma35d1.yaml
     and keep Documentation/devicetree/bindings/arm/npcm unchanged

2. Move the directory "Documentation/devicetree/bindings/arm/npcm" to 
"Documentation/devicetree/bindings/soc/nuvoton"
    and submit  the nuvoton,ma35d1.yaml to 
"Documentation/devicetree/bindings/soc/nuvoton"

I should do 1 or 2?  Thank you very much.


Best regards,
Jacky Huang

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Rob Herring]

On Fri, Mar 31, 2023 at 10:15:16AM +0800, Jacky Huang wrote:
> 
> 
> On 2023/3/30 下午 09:25, Krzysztof Kozlowski wrote:
> > On 30/03/2023 12:41, Jacky Huang wrote:
> > > Dear Rob,
> > > 
> > > 
> > > On 2023/3/29 下午 09:07, Rob Herring wrote:
> > > > On Mon, Mar 27, 2023 at 9:19 PM Jacky Huang <ychuang570808@gmail.com> wrote:
> > > > > From: Jacky Huang <ychuang3@nuvoton.com>
> > > > > 
> > > > > Rename the bindings/arm/npcm directory as nuvoton.
> > > > > Add binding for ARMv8 based Nuvotn SoCs and platform boards.
> > > > > Add initial bindings for ma35d1 series development boards.
> > > > > 
> > > > > Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> > > > > ---
> > > > >    .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
> > > > >    .../nuvoton,npcm-gcr.yaml}                    |  2 +-
> > > > >    .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
> > > > >    3 files changed, 32 insertions(+), 2 deletions(-)
> > > > >    create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
> > > > >    rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
> > > > Since you are moving it, this one should be moved to bindings/soc/nuvoton/
> > > > 
> > > > >    rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)
> > > OK, I will move "Documentation/devicetree/bindings/arm/npcm" to
> > > "Documentation/devicetree/bindings/soc/nuvoton".
> > To clarify - Rob asked *this one*. Not all.

nuvoton,gcr.yaml is what should be moved to bindings/soc/... The rest 
are the correct locations.

> > 
> > 
> > 
> > Best regards,
> > Krzysztof
> > 
> 
> Dear Krzysztof,
> 
> I am sorry that still cannot get it exactly.
> 
> 1. Just only submit  the nuvoton,ma35d1.yaml to
> Documentation/devicetree/bindings/soc/nuvoton/nuvoton,ma35d1.yaml
>     and keep Documentation/devicetree/bindings/arm/npcm unchanged
> 
> 2. Move the directory "Documentation/devicetree/bindings/arm/npcm" to
> "Documentation/devicetree/bindings/soc/nuvoton"
>    and submit  the nuvoton,ma35d1.yaml to
> "Documentation/devicetree/bindings/soc/nuvoton"
> 
> I should do 1 or 2?  Thank you very much.

Neither.

Arm board and soc root node bindings go in bindings/arm/...

Miscellaneous system registers that don't fit into any other bindings/* 
subsystem directory go in bindings/soc/

Rob

Re: [PATCH v6 05/12] dt-bindings: mfd: syscon: Add nuvoton,ma35d1-sys compatible

[Lee Jones]

On Tue, 28 Mar 2023, Jacky Huang wrote:

> From: Jacky Huang <ychuang3@nuvoton.com>
>
> Add Nuvoton ma35d1 system registers compatible.
>
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> ---
>  Documentation/devicetree/bindings/mfd/syscon.yaml | 1 +
>  1 file changed, 1 insertion(+)

Applied, thanks

--
Lee Jones [李琼斯]

Re: [PATCH v6 06/12] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Jacky Huang]

On 2023/4/4 上午 04:33, Rob Herring wrote:
> On Fri, Mar 31, 2023 at 10:15:16AM +0800, Jacky Huang wrote:
>>
>> On 2023/3/30 下午 09:25, Krzysztof Kozlowski wrote:
>>> On 30/03/2023 12:41, Jacky Huang wrote:
>>>> Dear Rob,
>>>>
>>>>
>>>> On 2023/3/29 下午 09:07, Rob Herring wrote:
>>>>> On Mon, Mar 27, 2023 at 9:19 PM Jacky Huang <ychuang570808@gmail.com> wrote:
>>>>>> From: Jacky Huang <ychuang3@nuvoton.com>
>>>>>>
>>>>>> Rename the bindings/arm/npcm directory as nuvoton.
>>>>>> Add binding for ARMv8 based Nuvotn SoCs and platform boards.
>>>>>> Add initial bindings for ma35d1 series development boards.
>>>>>>
>>>>>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>>>>>> ---
>>>>>>     .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
>>>>>>     .../nuvoton,npcm-gcr.yaml}                    |  2 +-
>>>>>>     .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
>>>>>>     3 files changed, 32 insertions(+), 2 deletions(-)
>>>>>>     create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
>>>>>>     rename Documentation/devicetree/bindings/arm/{npcm/nuvoton,gcr.yaml => nuvoton/nuvoton,npcm-gcr.yaml} (93%)
>>>>> Since you are moving it, this one should be moved to bindings/soc/nuvoton/
>>>>>
>>>>>>     rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)
>>>> OK, I will move "Documentation/devicetree/bindings/arm/npcm" to
>>>> "Documentation/devicetree/bindings/soc/nuvoton".
>>> To clarify - Rob asked *this one*. Not all.
> nuvoton,gcr.yaml is what should be moved to bindings/soc/... The rest
> are the correct locations.
>
>>>
>>>
>>> Best regards,
>>> Krzysztof
>>>
>> Dear Krzysztof,
>>
>> I am sorry that still cannot get it exactly.
>>
>> 1. Just only submit  the nuvoton,ma35d1.yaml to
>> Documentation/devicetree/bindings/soc/nuvoton/nuvoton,ma35d1.yaml
>>      and keep Documentation/devicetree/bindings/arm/npcm unchanged
>>
>> 2. Move the directory "Documentation/devicetree/bindings/arm/npcm" to
>> "Documentation/devicetree/bindings/soc/nuvoton"
>>     and submit  the nuvoton,ma35d1.yaml to
>> "Documentation/devicetree/bindings/soc/nuvoton"
>>
>> I should do 1 or 2?  Thank you very much.
> Neither.
>
> Arm board and soc root node bindings go in bindings/arm/...
>
> Miscellaneous system registers that don't fit into any other bindings/*
> subsystem directory go in bindings/soc/
>
> Rob

Dear Rob,

Thank you very much. I got it now.


Best regards,
Jacky Huang

Re: [PATCH v6 10/12] reset: Add Nuvoton ma35d1 reset driver support

[Philipp Zabel]

Hi Jacky,

On Tue, Mar 28, 2023 at 02:19:10AM +0000, Jacky Huang wrote:
> From: Jacky Huang <ychuang3@nuvoton.com>
> 
> This driver supports individual IP reset for ma35d1. The reset
> control registers is a subset of system control registers.
> 
> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
> ---
>  drivers/reset/Kconfig        |   6 ++
>  drivers/reset/Makefile       |   1 +
>  drivers/reset/reset-ma35d1.c | 152 +++++++++++++++++++++++++++++++++++
>  3 files changed, 159 insertions(+)
>  create mode 100644 drivers/reset/reset-ma35d1.c
> 
[...]
> diff --git a/drivers/reset/reset-ma35d1.c b/drivers/reset/reset-ma35d1.c
> new file mode 100644
> index 000000000000..221299e7b873
> --- /dev/null
> +++ b/drivers/reset/reset-ma35d1.c
> @@ -0,0 +1,152 @@
[...]
> +static int ma35d1_reset_update(struct reset_controller_dev *rcdev,
> +			       unsigned long id, bool assert)
> +{
> +	unsigned int reg;
> +	int ret;
> +	int offset = (id / RST_PRE_REG) * 4;
> +	struct ma35d1_reset_data *data =
> +			container_of(rcdev, struct ma35d1_reset_data, rcdev);
> +
> +	ret = regmap_read(data->regmap, REG_SYS_IPRST0 + offset, &reg);
> +	if (ret < 0)
> +		return ret;
> +	if (assert)
> +		reg |= 1 << (id % RST_PRE_REG);
> +	else
> +		reg &= ~(1 << (id % RST_PRE_REG));
> +
> +	return regmap_write(data->regmap, REG_SYS_IPRST0 + offset, reg);

This should use regmap_update_bits().

[...]
> +static int ma35d1_reset_status(struct reset_controller_dev *rcdev,
> +			      unsigned long id)
> +{
> +	int reg, ret;
> +	int offset = id / RST_PRE_REG;

Should this be

	int offset = (id / RST_PRE_REG) * 4;

?

> +static int ma35d1_reset_probe(struct platform_device *pdev)
> +{
> +	int err;
> +	struct device *dev = &pdev->dev;
> +	struct device_node *parent;
> +	struct ma35d1_reset_data *reset_data;
> +	struct ma35d1_reboot_data *reboot_data;
> +
> +	if (!pdev->dev.of_node) {
> +		dev_err(&pdev->dev, "Device tree node not found\n");
> +		return -EINVAL;
> +	}
> +
> +	reset_data = devm_kzalloc(dev, sizeof(*reset_data), GFP_KERNEL);
> +	if (!reset_data)
> +		return -ENOMEM;
> +
> +	reboot_data = devm_kzalloc(dev, sizeof(*reboot_data), GFP_KERNEL);
> +	if (!reboot_data)
> +		return -ENOMEM;

These structures could be combined into one.

regards
Philipp

Re: [PATCH v6 10/12] reset: Add Nuvoton ma35d1 reset driver support

[Jacky Huang]

Dear Philipp,



On 2023/4/25 上午 04:02, Philipp Zabel wrote:
> Hi Jacky,
>
> On Tue, Mar 28, 2023 at 02:19:10AM +0000, Jacky Huang wrote:
>> From: Jacky Huang <ychuang3@nuvoton.com>
>>
>> This driver supports individual IP reset for ma35d1. The reset
>> control registers is a subset of system control registers.
>>
>> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
>> ---
>>   drivers/reset/Kconfig        |   6 ++
>>   drivers/reset/Makefile       |   1 +
>>   drivers/reset/reset-ma35d1.c | 152 +++++++++++++++++++++++++++++++++++
>>   3 files changed, 159 insertions(+)
>>   create mode 100644 drivers/reset/reset-ma35d1.c
>>
> [...]
>> diff --git a/drivers/reset/reset-ma35d1.c b/drivers/reset/reset-ma35d1.c
>> new file mode 100644
>> index 000000000000..221299e7b873
>> --- /dev/null
>> +++ b/drivers/reset/reset-ma35d1.c
>> @@ -0,0 +1,152 @@
> [...]
>> +static int ma35d1_reset_update(struct reset_controller_dev *rcdev,
>> +			       unsigned long id, bool assert)
>> +{
>> +	unsigned int reg;
>> +	int ret;
>> +	int offset = (id / RST_PRE_REG) * 4;
>> +	struct ma35d1_reset_data *data =
>> +			container_of(rcdev, struct ma35d1_reset_data, rcdev);
>> +
>> +	ret = regmap_read(data->regmap, REG_SYS_IPRST0 + offset, &reg);
>> +	if (ret < 0)
>> +		return ret;
>> +	if (assert)
>> +		reg |= 1 << (id % RST_PRE_REG);
>> +	else
>> +		reg &= ~(1 << (id % RST_PRE_REG));
>> +
>> +	return regmap_write(data->regmap, REG_SYS_IPRST0 + offset, reg);
> This should use regmap_update_bits().
>
> [...]
>> +static int ma35d1_reset_status(struct reset_controller_dev *rcdev,
>> +			      unsigned long id)
>> +{
>> +	int reg, ret;
>> +	int offset = id / RST_PRE_REG;
> Should this be
>
> 	int offset = (id / RST_PRE_REG) * 4;
>
> ?

Yes, here is a coding mistake.
As the register offset was modified to be indexed by lookup table in v7, 
this
code was obsoleted.
Thank you for pointing out this.

>> +static int ma35d1_reset_probe(struct platform_device *pdev)
>> +{
>> +	int err;
>> +	struct device *dev = &pdev->dev;
>> +	struct device_node *parent;
>> +	struct ma35d1_reset_data *reset_data;
>> +	struct ma35d1_reboot_data *reboot_data;
>> +
>> +	if (!pdev->dev.of_node) {
>> +		dev_err(&pdev->dev, "Device tree node not found\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	reset_data = devm_kzalloc(dev, sizeof(*reset_data), GFP_KERNEL);
>> +	if (!reset_data)
>> +		return -ENOMEM;
>> +
>> +	reboot_data = devm_kzalloc(dev, sizeof(*reboot_data), GFP_KERNEL);
>> +	if (!reboot_data)
>> +		return -ENOMEM;
> These structures could be combined into one.

OK, we will combine them into one.

> regards
> Philipp

Best regards,
Jacky Huang