[PATCH v12 00/10] Introduce Nuvoton ma35d1 SoC

[PATCH v12 00/10] 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 6.4.0-rc4
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

v12:
  - Modify serial driver
    - Added PORT_MA35 to include/uapi/linux/serial_core.h, and apply to
      the port->type of ma35d1 serial driver
    - Added check for the return value of ioremap()
    - Fixed several coding issues
  - Rebase MAINTAINERS and recreate the patch

v11:
  - Rebase on top of 2023.05.24
  - Modify serial driver
    - Fixed several coding style issues
    - Fixed ma35d1serial_set_mctrl()
    - Added the 'MA35_' prefix to all register and bit field definitions.
    - Used 'ttyNVT' instead of 'ttyS'
  - Modify clock driver
    - Added 'source nuvoton/Kconfig' to drivers/clk/Kconfig
    - Fixed several coding issues
    - Removed unnecessary inline specifier
  - Modify reset driver
    - Fixed typo and added comments
  - Modify ma35d1.dtsi l2-cache node
    - Added cache-unified and cache-size properties

v10:
  - Change from using ARCH_NUVOTON to using ARCH_MA35. The following patch files
    have been modified:
    - patch 1 arch/arm64/Kconfig.platforms
    - patch 2 arch/arm64/configs/defconfig
    - patch 7 arch/arm64/boot/dts/nuvoton/Makefile
    - patch 8 drivers/clk/Makefile
              drivers/clk/nuvoton/Kconfig
              drivers/clk/nuvoton/Makefile
    - patch 9 drivers/reset/Kconfig
    - patch 10 drivers/tty/serial/Kconfig

v9:
  - Combine MAINTAINERS patch into patch 5 'dt-bindings: arm: Add initial bindings
    for Nuvoton platform'
  - Modify clock driver
    - Use the helper function for 64-bit division
    - Fixed minor issues
  - Modify reset driver
    - Refine coding style and add required header files
    - Add spin_lock protection
  - Add error return handling to the serial driver probe function

v8:
  - Remove '0005-dt-bindings-mfd-syscon-Add-nuvoton-ma35d1-sys-compat.patch' as it was applied.
  - Modify MAINTAINERS NUVOTON MA35 and NPCM path settings
  - Remove 'syscon' from dtsi 'sys' node and modify the corresponding yaml
  - Modify clock driver
    - Remove the header file and move definitions into .c files.
    - Use parent_data instead of parent name.
  - Modify serial driver
  - Modify reset driver
    - Modify reset register/offset lookup table to be indexed by reset id
    - Combined reset and reboot structure

v7:
  - Fixed dts system-management node and compatible driver
  - move 'nuvoton,npcm-gcr.yaml' from 'binding/arm/nuvoton' to 'binding/soc/nuvoton'
  - In ma35d1.dtsi, create the soc node for ma35d1 SoC
  - Modify the issues found in serial driver
  - Modify the issues found in clock driver
  - Modify the IDs of reset driver to be contiguous numbers and use lookup table
    to find register offset and bit position.
  - Modify MAINTAINERS NUVOTON NPCM path as npcm directory name to nuvoton

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 (10):
  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: Document ma35d1 reset control
  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

 .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  |  30 +
 .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |   2 +-
 .../bindings/clock/nuvoton,ma35d1-clk.yaml    |  63 ++
 .../bindings/reset/nuvoton,ma35d1-reset.yaml  |  45 +
 .../serial/nuvoton,ma35d1-serial.yaml         |  48 +
 .../nuvoton/nuvoton,npcm-gcr.yaml}            |   2 +-
 MAINTAINERS                                   |  13 +-
 arch/arm64/Kconfig.platforms                  |   8 +
 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       | 234 +++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/clk/Kconfig                           |   1 +
 drivers/clk/Makefile                          |   1 +
 drivers/clk/nuvoton/Kconfig                   |  19 +
 drivers/clk/nuvoton/Makefile                  |   4 +
 drivers/clk/nuvoton/clk-ma35d1-divider.c      | 135 +++
 drivers/clk/nuvoton/clk-ma35d1-pll.c          | 361 +++++++
 drivers/clk/nuvoton/clk-ma35d1.c              | 933 ++++++++++++++++++
 drivers/reset/Kconfig                         |   6 +
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-ma35d1.c                  | 235 +++++
 drivers/tty/serial/Kconfig                    |  18 +
 drivers/tty/serial/Makefile                   |   1 +
 drivers/tty/serial/ma35d1_serial.c            | 801 +++++++++++++++
 .../dt-bindings/clock/nuvoton,ma35d1-clk.h    | 253 +++++
 .../dt-bindings/reset/nuvoton,ma35d1-reset.h  | 108 ++
 include/uapi/linux/serial_core.h              |   3 +
 29 files changed, 3437 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
 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
 rename Documentation/devicetree/bindings/{arm/npcm/nuvoton,gcr.yaml => soc/nuvoton/nuvoton,npcm-gcr.yaml} (93%)
 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/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 v12 01/10] 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>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 arch/arm64/Kconfig.platforms | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 89a0b13b058d..e28dbc477a99 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -225,6 +225,14 @@ config ARCH_S32
 
 endif
 
+config ARCH_MA35
+	bool "Nuvoton MA35 Architecture"
+	select GPIOLIB
+	select PINCTRL
+	select RESET_CONTROLLER
+	help
+	  This enables support for the ARMv8 based Nuvoton MA35 series SoCs.
+
 config ARCH_NPCM
 	bool "Nuvoton NPCM Architecture"
 	select PINCTRL
-- 
2.34.1

[PATCH v12 02/10] 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>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index a24609e14d50..0ee572753f1a 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -52,6 +52,7 @@ CONFIG_ARCH_NXP=y
 CONFIG_ARCH_LAYERSCAPE=y
 CONFIG_ARCH_MXC=y
 CONFIG_ARCH_S32=y
+CONFIG_ARCH_MA35=y
 CONFIG_ARCH_NPCM=y
 CONFIG_ARCH_QCOM=y
 CONFIG_ARCH_RENESAS=y
-- 
2.34.1

[PATCH v12 03/10] 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>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../bindings/clock/nuvoton,ma35d1-clk.yaml    |  63 +++++
 .../dt-bindings/clock/nuvoton,ma35d1-clk.h    | 253 ++++++++++++++++++
 2 files changed, 316 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..8f0c43683729
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/nuvoton,ma35d1-clk.yaml
@@ -0,0 +1,63 @@
+# 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
+
+  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
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+
+    clock-controller@40460200 {
+        compatible = "nuvoton,ma35d1-clk";
+        reg = <0x40460200 0x100>;
+        #clock-cells = <1>;
+        clocks = <&clk_hxt>;
+    };
+...
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 v12 04/10] dt-bindings: reset: nuvoton: Document ma35d1 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>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../bindings/reset/nuvoton,ma35d1-reset.yaml  |  45 ++++++++
 .../dt-bindings/reset/nuvoton,ma35d1-reset.h  | 108 ++++++++++++++++++
 2 files changed, 153 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..34c5c1c08ec1
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml
@@ -0,0 +1,45 @@
+# 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:
+    items:
+      - const: nuvoton,ma35d1-reset
+
+  reg:
+    maxItems: 1
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  # system reset controller node:
+  - |
+
+    system-management@40460000 {
+        compatible = "nuvoton,ma35d1-reset";
+        reg = <0x40460000 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..2e99ee0d68c5
--- /dev/null
+++ b/include/dt-bindings/reset/nuvoton,ma35d1-reset.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: (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	8
+#define MA35D1_RESET_VCAP0	9
+#define MA35D1_RESET_VCAP1	10
+#define MA35D1_RESET_GFX	11
+#define MA35D1_RESET_VDEC	12
+#define MA35D1_RESET_WHC0	13
+#define MA35D1_RESET_WHC1	14
+#define MA35D1_RESET_GMAC0	15
+#define MA35D1_RESET_GMAC1	16
+#define MA35D1_RESET_HWSEM	17
+#define MA35D1_RESET_EBI	18
+#define MA35D1_RESET_HSUSBH0	19
+#define MA35D1_RESET_HSUSBH1	20
+#define MA35D1_RESET_HSUSBD	21
+#define MA35D1_RESET_USBHL	22
+#define MA35D1_RESET_SDH0	23
+#define MA35D1_RESET_SDH1	24
+#define MA35D1_RESET_NAND	25
+#define MA35D1_RESET_GPIO	26
+#define MA35D1_RESET_MCTLP	27
+#define MA35D1_RESET_MCTLC	28
+#define MA35D1_RESET_DDRPUB	29
+#define MA35D1_RESET_TMR0	30
+#define MA35D1_RESET_TMR1	31
+#define MA35D1_RESET_TMR2	32
+#define MA35D1_RESET_TMR3	33
+#define MA35D1_RESET_I2C0	34
+#define MA35D1_RESET_I2C1	35
+#define MA35D1_RESET_I2C2	36
+#define MA35D1_RESET_I2C3	37
+#define MA35D1_RESET_QSPI0	38
+#define MA35D1_RESET_SPI0	39
+#define MA35D1_RESET_SPI1	40
+#define MA35D1_RESET_SPI2	41
+#define MA35D1_RESET_UART0	42
+#define MA35D1_RESET_UART1	43
+#define MA35D1_RESET_UART2	44
+#define MA35D1_RESET_UART3	45
+#define MA35D1_RESET_UART4	46
+#define MA35D1_RESET_UART5	47
+#define MA35D1_RESET_UART6	48
+#define MA35D1_RESET_UART7	49
+#define MA35D1_RESET_CANFD0	50
+#define MA35D1_RESET_CANFD1	51
+#define MA35D1_RESET_EADC0	52
+#define MA35D1_RESET_I2S0	53
+#define MA35D1_RESET_SC0	54
+#define MA35D1_RESET_SC1	55
+#define MA35D1_RESET_QSPI1	56
+#define MA35D1_RESET_SPI3	57
+#define MA35D1_RESET_EPWM0	58
+#define MA35D1_RESET_EPWM1	59
+#define MA35D1_RESET_QEI0	60
+#define MA35D1_RESET_QEI1	61
+#define MA35D1_RESET_ECAP0	62
+#define MA35D1_RESET_ECAP1	63
+#define MA35D1_RESET_CANFD2	64
+#define MA35D1_RESET_ADC0	65
+#define MA35D1_RESET_TMR4	66
+#define MA35D1_RESET_TMR5	67
+#define MA35D1_RESET_TMR6	68
+#define MA35D1_RESET_TMR7	69
+#define MA35D1_RESET_TMR8	70
+#define MA35D1_RESET_TMR9	71
+#define MA35D1_RESET_TMR10	72
+#define MA35D1_RESET_TMR11	73
+#define MA35D1_RESET_UART8	74
+#define MA35D1_RESET_UART9	75
+#define MA35D1_RESET_UART10	76
+#define MA35D1_RESET_UART11	77
+#define MA35D1_RESET_UART12	78
+#define MA35D1_RESET_UART13	79
+#define MA35D1_RESET_UART14	80
+#define MA35D1_RESET_UART15	81
+#define MA35D1_RESET_UART16	82
+#define MA35D1_RESET_I2S1	83
+#define MA35D1_RESET_I2C4	84
+#define MA35D1_RESET_I2C5	85
+#define MA35D1_RESET_EPWM2	86
+#define MA35D1_RESET_ECAP2	87
+#define MA35D1_RESET_QEI2	88
+#define MA35D1_RESET_CANFD3	89
+#define MA35D1_RESET_KPI	90
+#define MA35D1_RESET_GIC	91
+#define MA35D1_RESET_SSMCC	92
+#define MA35D1_RESET_SSPCC	93
+#define MA35D1_RESET_COUNT	94
+
+#endif
-- 
2.34.1

[PATCH v12 05/10] dt-bindings: arm: Add initial bindings for Nuvoton platform

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Modify Nuvoton NPCM and MA35 platform board bindings
  - Move 'nuvoton,npcm-gcr.yaml' from 'bindings/arm/npcm' to
    'bindings/soc/nuvoton'.
  - Rename the 'bindings/arm/npcm' directory to 'bindings/arm/nuvoton'.
  - Add bindings for ARMv8-based Nuvoton SoCs and platform boards, and
    include the initial bindings for ma35d1 series development boards.

Modify MAINTAINERS
  - Remove the line for 'bindings/arm/npcm/' under ARM/NUVOTON NPCM, as it
    has been renamed.
  - Add ARM/NUVOTON MA35 for Nuvoton MA35 series SoCs maintainer and files.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/arm/nuvoton/nuvoton,ma35d1.yaml  | 30 +++++++++++++++++++
 .../npcm.yaml => nuvoton/nuvoton,npcm.yaml}   |  2 +-
 .../nuvoton/nuvoton,npcm-gcr.yaml}            |  2 +-
 MAINTAINERS                                   | 13 +++++++-
 4 files changed, 44 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/nuvoton/nuvoton,ma35d1.yaml
 rename Documentation/devicetree/bindings/arm/{npcm/npcm.yaml => nuvoton/nuvoton,npcm.yaml} (93%)
 rename Documentation/devicetree/bindings/{arm/npcm/nuvoton,gcr.yaml => soc/nuvoton/nuvoton,npcm-gcr.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:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+
+      - description: MA35D1 based boards
+        items:
+          - enum:
+              - nuvoton,ma35d1-iot
+              - nuvoton,ma35d1-som
+          - const: nuvoton,ma35d1
+
+additionalProperties: true
+...
diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.yaml b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm.yaml
similarity index 93%
rename from Documentation/devicetree/bindings/arm/npcm/npcm.yaml
rename to Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm.yaml
index 6871483947c5..d386744c8815 100644
--- a/Documentation/devicetree/bindings/arm/npcm/npcm.yaml
+++ b/Documentation/devicetree/bindings/arm/nuvoton/nuvoton,npcm.yaml
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
 %YAML 1.2
 ---
-$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
diff --git a/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml b/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-gcr.yaml
similarity index 93%
rename from Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml
rename to Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-gcr.yaml
index 94e72f25b331..23e7e4ea01ff 100644
--- a/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml
+++ b/Documentation/devicetree/bindings/soc/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/soc/nuvoton/nuvoton,npcm-gcr.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: Global Control Registers block in Nuvoton SoCs
diff --git a/MAINTAINERS b/MAINTAINERS
index 250518fc70ff..a530735c9e87 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2505,6 +2505,18 @@ 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/*/*/*ma35*
+F:	Documentation/devicetree/bindings/*/*ma35*
+F:	arch/arm64/boot/dts/nuvoton/*ma35*
+F:	drivers/*/*/*ma35*
+F:	drivers/*/*ma35*
+K:	ma35d1
+
 ARM/NUVOTON NPCM ARCHITECTURE
 M:	Avi Fishman <avifishman70@gmail.com>
 M:	Tomer Maimon <tmaimon77@gmail.com>
@@ -2516,7 +2528,6 @@ L:	openbmc@lists.ozlabs.org (moderated for non-subscribers)
 S:	Supported
 F:	Documentation/devicetree/bindings/*/*/*npcm*
 F:	Documentation/devicetree/bindings/*/*npcm*
-F:	Documentation/devicetree/bindings/arm/npcm/*
 F:	Documentation/devicetree/bindings/rtc/nuvoton,nct3018y.yaml
 F:	arch/arm/boot/dts/nuvoton-npcm*
 F:	arch/arm/mach-npcm/
-- 
2.34.1

[PATCH v12 06/10] dt-bindings: serial: Document ma35d1 uart controller

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

Add documentation that describes the nuvoton ma35d1 UART driver bindings.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../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 v12 07/10] 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>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 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       | 234 ++++++++++++++++++
 4 files changed, 348 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..3bc9787801a5 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-$(CONFIG_ARCH_MA35) += ma35d1-iot-512m.dtb
+dtb-$(CONFIG_ARCH_MA35) += ma35d1-som-256m.dtb
 dtb-$(CONFIG_ARCH_NPCM) += nuvoton-npcm845-evb.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..781cdae566a0
--- /dev/null
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
@@ -0,0 +1,234 @@
+// 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-cache {
+			compatible = "cache";
+			cache-level = <2>;
+			cache-unified;
+			cache-size = <0x80000>;
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
+	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)>;
+	};
+
+	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 */
+		interrupt-parent = <&gic>;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		sys: system-management@40460000 {
+			compatible = "nuvoton,ma35d1-reset";
+			reg = <0x0 0x40460000 0x0 0x200>;
+			#reset-cells = <1>;
+		};
+
+		clk: clock-controller@40460200 {
+			compatible = "nuvoton,ma35d1-clk";
+			reg = <0x00000000 0x40460200 0x0 0x100>;
+			#clock-cells = <1>;
+			clocks = <&clk_hxt>;
+		};
+
+		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 v12 08/10] 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>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 drivers/clk/Kconfig                      |   1 +
 drivers/clk/Makefile                     |   1 +
 drivers/clk/nuvoton/Kconfig              |  19 +
 drivers/clk/nuvoton/Makefile             |   4 +
 drivers/clk/nuvoton/clk-ma35d1-divider.c | 135 ++++
 drivers/clk/nuvoton/clk-ma35d1-pll.c     | 361 +++++++++
 drivers/clk/nuvoton/clk-ma35d1.c         | 933 +++++++++++++++++++++++
 7 files changed, 1454 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

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 016814e15536..db789055e0fd 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -478,6 +478,7 @@ source "drivers/clk/meson/Kconfig"
 source "drivers/clk/mstar/Kconfig"
 source "drivers/clk/microchip/Kconfig"
 source "drivers/clk/mvebu/Kconfig"
+source "drivers/clk/nuvoton/Kconfig"
 source "drivers/clk/pistachio/Kconfig"
 source "drivers/clk/qcom/Kconfig"
 source "drivers/clk/ralink/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 0aebef17edc6..7cb000549b61 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -106,6 +106,7 @@ endif
 obj-y					+= mstar/
 obj-y					+= mvebu/
 obj-$(CONFIG_ARCH_MXS)			+= mxs/
+obj-$(CONFIG_ARCH_MA35)			+= nuvoton/
 obj-$(CONFIG_COMMON_CLK_NXP)		+= nxp/
 obj-$(CONFIG_COMMON_CLK_PISTACHIO)	+= pistachio/
 obj-$(CONFIG_COMMON_CLK_PXA)		+= pxa/
diff --git a/drivers/clk/nuvoton/Kconfig b/drivers/clk/nuvoton/Kconfig
new file mode 100644
index 000000000000..fe4b7f62f467
--- /dev/null
+++ b/drivers/clk/nuvoton/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+# common clock support for Nuvoton SoC family.
+
+config COMMON_CLK_NUVOTON
+	bool "Nuvoton clock controller common support"
+	depends on ARCH_MA35 || COMPILE_TEST
+	default y
+	help
+	  Say y here to enable common clock controller for Nuvoton platforms.
+
+if COMMON_CLK_NUVOTON
+
+config CLK_MA35D1
+	bool "Nuvoton MA35D1 clock controller support"
+	default y
+	help
+	  Build the clock controller driver for MA35D1 SoC.
+
+endif
diff --git a/drivers/clk/nuvoton/Makefile b/drivers/clk/nuvoton/Makefile
new file mode 100644
index 000000000000..c3c59dd9f2aa
--- /dev/null
+++ b/drivers/clk/nuvoton/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_CLK_MA35D1) += clk-ma35d1.o
+obj-$(CONFIG_CLK_MA35D1) += clk-ma35d1-divider.o
+obj-$(CONFIG_CLK_MA35D1) += 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..0c2bed47909a
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1-divider.c
@@ -0,0 +1,135 @@
+// 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>
+
+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;
+};
+
+struct clk_hw *ma35d1_reg_adc_clkdiv(struct device *dev, const char *name,
+				     struct clk_hw *parent_hw, spinlock_t *lock,
+				     unsigned long flags, void __iomem *reg,
+				     u8 shift, u8 width, u32 mask_bit);
+
+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 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 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 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);
+
+	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);
+
+	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,
+				     struct clk_hw *parent_hw, 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;
+	struct clk_parent_data pdata = { .index = 0 };
+	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;
+
+	memset(&init, 0, sizeof(init));
+	init.name = name;
+	init.ops = &ma35d1_adc_clkdiv_ops;
+	init.flags |= flags;
+	pdata.hw = parent_hw;
+	init.parent_data = &pdata;
+	init.num_parents = 1;
+
+	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)
+		return ERR_PTR(ret);
+	return hw;
+}
+EXPORT_SYMBOL_GPL(ma35d1_reg_adc_clkdiv);
diff --git a/drivers/clk/nuvoton/clk-ma35d1-pll.c b/drivers/clk/nuvoton/clk-ma35d1-pll.c
new file mode 100644
index 000000000000..e4c9f94e6796
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1-pll.c
@@ -0,0 +1,361 @@
+// 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/container_of.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/slab.h>
+#include <linux/units.h>
+#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+
+/* PLL frequency limits */
+#define PLL_FREF_MAX_FREQ	(200 * HZ_PER_MHZ)
+#define PLL_FREF_MIN_FREQ	(1 * HZ_PER_MHZ)
+#define PLL_FREF_M_MAX_FREQ	(40 * HZ_PER_MHZ)
+#define PLL_FREF_M_MIN_FREQ	(10 * HZ_PER_MHZ)
+#define PLL_FCLK_MAX_FREQ	(2400 * HZ_PER_MHZ)
+#define PLL_FCLK_MIN_FREQ	(600 * HZ_PER_MHZ)
+#define PLL_FCLKO_MAX_FREQ	(2400 * HZ_PER_MHZ)
+#define PLL_FCLKO_MIN_FREQ	(85700 * HZ_PER_KHZ)
+#define PLL_SS_RATE		0x77
+#define PLL_SLOPE		0x58CFA
+
+#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
+
+#define PLL_MODE_INT            0
+#define PLL_MODE_FRAC           1
+#define PLL_MODE_SS             2
+
+struct ma35d1_clk_pll {
+	struct clk_hw hw;
+	u32 id;
+	u8 mode;
+	void __iomem *ctl0_base;
+	void __iomem *ctl1_base;
+	void __iomem *ctl2_base;
+};
+
+struct clk_hw *ma35d1_reg_clk_pll(struct device *dev, u32 id, u8 u8mode, const char *name,
+				  struct clk_hw *parent_hw, void __iomem *base);
+
+static inline struct ma35d1_clk_pll *to_ma35d1_clk_pll(struct clk_hw *_hw)
+{
+	return container_of(_hw, struct ma35d1_clk_pll, hw);
+}
+
+static unsigned long ma35d1_calc_smic_pll_freq(u32 pll0_ctl0,
+					       unsigned long parent_rate)
+{
+	u32 m, n, p, outdiv;
+	u64 pll_freq;
+
+	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 = 1 << p;
+	pll_freq = (u64)parent_rate * n;
+	div_u64(pll_freq, m * outdiv);
+	return pll_freq;
+}
+
+static unsigned long ma35d1_calc_pll_freq(u8 mode, u32 *reg_ctl, unsigned long parent_rate)
+{
+	unsigned long pll_freq, x;
+	u32 m, n, p;
+
+	if (reg_ctl[1] & PLL_CTL1_BP)
+		return parent_rate;
+
+	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]);
+
+	if (mode == PLL_MODE_INT) {
+		pll_freq = (u64)parent_rate * n;
+		div_u64(pll_freq, m * p);
+	} else {
+		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 = div_u64(parent_rate * n, 100 * m * p);
+	}
+	return 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)
+{
+	unsigned long min_diff = ULONG_MAX;
+	int fbdiv_min, fbdiv_max;
+	int p, m, n;
+
+	*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, fclk, diff;
+
+				tmp = div_u64(parent_rate, m);
+				if (tmp < PLL_FREF_M_MIN_FREQ ||
+				    tmp > PLL_FREF_M_MAX_FREQ)
+					continue; /* constrain */
+
+				fclk = div_u64(parent_rate * n, m);
+				/* for 2 decimal places */
+				if (pll->mode != PLL_MODE_INT)
+					fclk = div_u64(fclk, 100);
+
+				if (fclk < PLL_FCLK_MIN_FREQ ||
+				    fclk > PLL_FCLK_MAX_FREQ)
+					continue; /* constrain */
+
+				fout = div_u64(fclk, p);
+				if (fout < PLL_FCLKO_MIN_FREQ ||
+				    fout > PLL_FCLKO_MAX_FREQ)
+					continue; /* constrain */
+
+				diff = abs(rate - fout);
+				if (diff < min_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;
+					min_diff = diff;
+					if (min_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;
+
+	ret = ma35d1_pll_find_closest(pll, rate, parent_rate, reg_ctl, &pll_freq);
+	if (ret != 0)
+		return ret;
+
+	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;
+
+	writel_relaxed(reg_ctl[0], pll->ctl0_base);
+	writel_relaxed(reg_ctl[1], pll->ctl1_base);
+	writel_relaxed(reg_ctl[2], pll->ctl2_base);
+	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->id) {
+	case CAPLL:
+		reg_ctl[0] = readl_relaxed(pll->ctl0_base);
+		pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], parent_rate);
+		return pll_freq;
+	case DDRPLL:
+	case APLL:
+	case EPLL:
+	case 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 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->id) {
+	case CAPLL:
+		reg_ctl[0] = readl_relaxed(pll->ctl0_base);
+		pll_freq = ma35d1_calc_smic_pll_freq(reg_ctl[0], *parent_rate);
+		return pll_freq;
+	case DDRPLL:
+	case APLL:
+	case EPLL:
+	case 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 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);
+}
+
+static int ma35d1_clk_pll_prepare(struct clk_hw *hw)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 val;
+
+	val = readl_relaxed(pll->ctl1_base);
+	val &= ~PLL_CTL1_PD;
+	writel_relaxed(val, pll->ctl1_base);
+	return 0;
+}
+
+static void ma35d1_clk_pll_unprepare(struct clk_hw *hw)
+{
+	struct ma35d1_clk_pll *pll = to_ma35d1_clk_pll(hw);
+	u32 val;
+
+	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,
+};
+
+static const struct clk_ops ma35d1_clk_fixed_pll_ops = {
+	.recalc_rate = ma35d1_clk_pll_recalc_rate,
+	.round_rate = ma35d1_clk_pll_round_rate,
+};
+
+struct clk_hw *ma35d1_reg_clk_pll(struct device *dev, u32 id, u8 u8mode, const char *name,
+				  struct clk_hw *parent_hw, void __iomem *base)
+{
+	struct clk_parent_data pdata = { .index = 0 };
+	struct clk_init_data init = {};
+	struct ma35d1_clk_pll *pll;
+	struct clk_hw *hw;
+	int ret;
+
+	pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return ERR_PTR(-ENOMEM);
+
+	pll->id = id;
+	pll->mode = u8mode;
+	pll->ctl0_base = base + REG_PLL_CTL0_OFFSET;
+	pll->ctl1_base = base + REG_PLL_CTL1_OFFSET;
+	pll->ctl2_base = base + REG_PLL_CTL2_OFFSET;
+
+	init.name = name;
+	init.flags = 0;
+	pdata.hw = parent_hw;
+	init.parent_data = &pdata;
+	init.num_parents = 1;
+
+	if (id == CAPLL || id == DDRPLL)
+		init.ops = &ma35d1_clk_fixed_pll_ops;
+	else
+		init.ops = &ma35d1_clk_pll_ops;
+
+	pll->hw.init = &init;
+	hw = &pll->hw;
+
+	ret = devm_clk_hw_register(dev, hw);
+	if (ret)
+		return ERR_PTR(ret);
+	return hw;
+}
+EXPORT_SYMBOL_GPL(ma35d1_reg_clk_pll);
diff --git a/drivers/clk/nuvoton/clk-ma35d1.c b/drivers/clk/nuvoton/clk-ma35d1.c
new file mode 100644
index 000000000000..297b11585f00
--- /dev/null
+++ b/drivers/clk/nuvoton/clk-ma35d1.c
@@ -0,0 +1,933 @@
+// 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/platform_device.h>
+#include <linux/spinlock.h>
+#include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+
+static DEFINE_SPINLOCK(ma35d1_lock);
+
+#define PLL_MAX_NUM		5
+
+/* 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 PLL_MODE_INT            0
+#define PLL_MODE_FRAC           1
+#define PLL_MODE_SS             2
+
+struct clk_hw *ma35d1_reg_clk_pll(struct device *dev, u32 id, u8 u8mode,
+				  const char *name, struct clk_hw *parent_hw,
+				  void __iomem *base);
+struct clk_hw *ma35d1_reg_adc_clkdiv(struct device *dev, const char *name,
+				     struct clk_hw *hw, spinlock_t *lock,
+				     unsigned long flags, void __iomem *reg,
+				     u8 shift, u8 width, u32 mask_bit);
+
+static const struct clk_parent_data ca35clk_sel_clks[] = {
+	{ .index = 0 },  /* HXT */
+	{ .index = 1 },  /* CAPLL */
+	{ .index = 2 }   /* DDRPLL */
+};
+
+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 struct clk_hw *ma35d1_clk_fixed(const char *name, int rate)
+{
+	return clk_hw_register_fixed_rate(NULL, name, NULL, 0, rate);
+}
+
+static struct clk_hw *ma35d1_clk_mux_parent(struct device *dev, const char *name,
+					    void __iomem *reg, u8 shift, u8 width,
+					    const struct clk_parent_data *pdata,
+					    int num_pdata)
+{
+	return clk_hw_register_mux_parent_data(dev, name, pdata, num_pdata,
+					       CLK_SET_RATE_NO_REPARENT, reg, shift,
+					       width, 0, &ma35d1_lock);
+}
+
+static struct clk_hw *ma35d1_clk_mux(struct device *dev, const char *name,
+				     void __iomem *reg, u8 shift, u8 width,
+				     const char *const *parents, int num_parents)
+{
+	return devm_clk_hw_register_mux(dev, name, parents, num_parents,
+					CLK_SET_RATE_NO_REPARENT, reg, shift,
+					width, 0, &ma35d1_lock);
+}
+
+static struct clk_hw *ma35d1_clk_divider(struct device *dev, const char *name,
+					 const char *parent, void __iomem *reg,
+					 u8 shift, u8 width)
+{
+	return devm_clk_hw_register_divider(dev, name, parent, CLK_SET_RATE_PARENT,
+					    reg, shift, width, 0, &ma35d1_lock);
+}
+
+static struct clk_hw *ma35d1_clk_divider_pow2(struct device *dev, const char *name,
+					      const char *parent, void __iomem *reg,
+					      u8 shift, u8 width)
+{
+	return devm_clk_hw_register_divider(dev, name, parent,
+					    CLK_DIVIDER_POWER_OF_TWO, reg, shift,
+					    width, 0, &ma35d1_lock);
+}
+
+static struct clk_hw *ma35d1_clk_divider_table(struct device *dev, const char *name,
+					       const char *parent, void __iomem *reg,
+					       u8 shift, u8 width,
+					       const struct clk_div_table *table)
+{
+	return devm_clk_hw_register_divider_table(dev, name, parent, 0,
+						  reg, shift, width, 0,
+						  table, &ma35d1_lock);
+}
+
+static struct clk_hw *ma35d1_clk_fixed_factor(struct device *dev, const char *name,
+					      const char *parent, unsigned int mult,
+					      unsigned int div)
+{
+	return devm_clk_hw_register_fixed_factor(dev, name, parent,
+					    CLK_SET_RATE_PARENT, mult, div);
+}
+
+static struct clk_hw *ma35d1_clk_gate(struct device *dev, const char *name, const char *parent,
+				      void __iomem *reg, u8 shift)
+{
+	return devm_clk_hw_register_gate(dev, name, parent, CLK_SET_RATE_PARENT,
+				    reg, shift, 0, &ma35d1_lock);
+}
+
+static int ma35d1_get_pll_setting(struct device_node *clk_node, u32 *pllmode)
+{
+	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 0;
+}
+
+static int ma35d1_clocks_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *clk_node = pdev->dev.of_node;
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	void __iomem *clk_base;
+	static struct clk_hw **hws;
+	static struct clk_hw_onecell_data *ma35d1_hw_data;
+	u32 pllmode[PLL_MAX_NUM];
+	int ret;
+
+	ma35d1_hw_data = devm_kzalloc(dev,
+				      struct_size(ma35d1_hw_data, hws, CLK_MAX_IDX),
+				      GFP_KERNEL);
+	if (!ma35d1_hw_data)
+		return -ENOMEM;
+
+	ma35d1_hw_data->num = CLK_MAX_IDX;
+	hws = ma35d1_hw_data->hws;
+
+	clk_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(clk_base))
+		return PTR_ERR(clk_base);
+
+	ret = ma35d1_get_pll_setting(clk_node, pllmode);
+	if (ret < 0) {
+		dev_err(dev, "Invalid PLL setting!\n");
+		return -EINVAL;
+	}
+
+	hws[HXT] = ma35d1_clk_fixed("hxt", 24000000);
+	hws[HXT_GATE] = ma35d1_clk_gate(dev, "hxt_gate", "hxt",
+					clk_base + REG_CLK_PWRCTL, 0);
+	hws[LXT] = ma35d1_clk_fixed("lxt", 32768);
+	hws[LXT_GATE] = ma35d1_clk_gate(dev, "lxt_gate", "lxt",
+					clk_base + REG_CLK_PWRCTL, 1);
+	hws[HIRC] = ma35d1_clk_fixed("hirc", 12000000);
+	hws[HIRC_GATE] = ma35d1_clk_gate(dev, "hirc_gate", "hirc",
+					 clk_base + REG_CLK_PWRCTL, 2);
+	hws[LIRC] = ma35d1_clk_fixed("lirc", 32000);
+	hws[LIRC_GATE] = ma35d1_clk_gate(dev, "lirc_gate", "lirc",
+					 clk_base + REG_CLK_PWRCTL, 3);
+
+	hws[CAPLL] = ma35d1_reg_clk_pll(dev, CAPLL, pllmode[0], "capll",
+					hws[HXT], clk_base + REG_CLK_PLL0CTL0);
+	hws[SYSPLL] = ma35d1_clk_fixed("syspll", 180000000);
+	hws[DDRPLL] = ma35d1_reg_clk_pll(dev, DDRPLL, pllmode[1], "ddrpll",
+					hws[HXT], clk_base + REG_CLK_PLL2CTL0);
+	hws[APLL] = ma35d1_reg_clk_pll(dev, APLL, pllmode[2], "apll",
+				       hws[HXT], clk_base + REG_CLK_PLL3CTL0);
+	hws[EPLL] = ma35d1_reg_clk_pll(dev, EPLL, pllmode[3], "epll",
+				       hws[HXT], clk_base + REG_CLK_PLL4CTL0);
+	hws[VPLL] = ma35d1_reg_clk_pll(dev, VPLL, pllmode[4], "vpll",
+				       hws[HXT], clk_base + REG_CLK_PLL5CTL0);
+
+	hws[EPLL_DIV2] = ma35d1_clk_fixed_factor(dev, "epll_div2", "epll", 1, 2);
+	hws[EPLL_DIV4] = ma35d1_clk_fixed_factor(dev, "epll_div4", "epll", 1, 4);
+	hws[EPLL_DIV8] = ma35d1_clk_fixed_factor(dev, "epll_div8", "epll", 1, 8);
+
+	hws[CA35CLK_MUX] = ma35d1_clk_mux_parent(dev, "ca35clk_mux",
+						 clk_base + REG_CLK_CLKSEL0, 0, 2,
+						 ca35clk_sel_clks,
+						 ARRAY_SIZE(ca35clk_sel_clks));
+	hws[AXICLK_DIV2] = ma35d1_clk_fixed_factor(dev, "capll_div2", "ca35clk_mux", 1, 2);
+	hws[AXICLK_DIV4] = ma35d1_clk_fixed_factor(dev, "capll_div4", "ca35clk_mux", 1, 4);
+
+	hws[AXICLK_MUX] = ma35d1_clk_mux(dev, "axiclk_mux", clk_base + REG_CLK_CLKDIV0,
+					 26, 1, axiclk_sel_clks,
+					 ARRAY_SIZE(axiclk_sel_clks));
+	hws[SYSCLK0_MUX] = ma35d1_clk_mux(dev, "sysclk0_mux", clk_base + REG_CLK_CLKSEL0,
+					  2, 1, sysclk0_sel_clks,
+					  ARRAY_SIZE(sysclk0_sel_clks));
+	hws[SYSCLK1_MUX] = ma35d1_clk_mux(dev, "sysclk1_mux", clk_base + REG_CLK_CLKSEL0,
+					  4, 1, sysclk1_sel_clks,
+					  ARRAY_SIZE(sysclk1_sel_clks));
+	hws[SYSCLK1_DIV2] = ma35d1_clk_fixed_factor(dev, "sysclk1_div2", "sysclk1_mux", 1, 2);
+
+	/* HCLK0~3 & PCLK0~4 */
+	hws[HCLK0] = ma35d1_clk_fixed_factor(dev, "hclk0", "sysclk1_mux", 1, 1);
+	hws[HCLK1] = ma35d1_clk_fixed_factor(dev, "hclk1", "sysclk1_mux", 1, 1);
+	hws[HCLK2] = ma35d1_clk_fixed_factor(dev, "hclk2", "sysclk1_mux", 1, 1);
+	hws[PCLK0] = ma35d1_clk_fixed_factor(dev, "pclk0", "sysclk1_mux", 1, 1);
+	hws[PCLK1] = ma35d1_clk_fixed_factor(dev, "pclk1", "sysclk1_mux", 1, 1);
+	hws[PCLK2] = ma35d1_clk_fixed_factor(dev, "pclk2", "sysclk1_mux", 1, 1);
+
+	hws[HCLK3] = ma35d1_clk_fixed_factor(dev, "hclk3", "sysclk1_mux", 1, 2);
+	hws[PCLK3] = ma35d1_clk_fixed_factor(dev, "pclk3", "sysclk1_mux", 1, 2);
+	hws[PCLK4] = ma35d1_clk_fixed_factor(dev, "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(dev, "ddr0_gate", "ddrpll",
+					 clk_base + REG_CLK_SYSCLK0, 4);
+	hws[DDR6_GATE] = ma35d1_clk_gate(dev, "ddr6_gate", "ddrpll",
+					 clk_base + REG_CLK_SYSCLK0, 5);
+
+	hws[CAN0_MUX] = ma35d1_clk_mux(dev, "can0_mux", clk_base + REG_CLK_CLKSEL4,
+				       16, 1, can_sel_clks, ARRAY_SIZE(can_sel_clks));
+	hws[CAN0_DIV] = ma35d1_clk_divider_table(dev, "can0_div", "can0_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 0, 3, ip_div_table);
+	hws[CAN0_GATE] = ma35d1_clk_gate(dev, "can0_gate", "can0_div",
+					 clk_base + REG_CLK_SYSCLK0, 8);
+	hws[CAN1_MUX] = ma35d1_clk_mux(dev, "can1_mux", clk_base + REG_CLK_CLKSEL4,
+				       17, 1, can_sel_clks, ARRAY_SIZE(can_sel_clks));
+	hws[CAN1_DIV] = ma35d1_clk_divider_table(dev, "can1_div", "can1_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 4, 3, ip_div_table);
+	hws[CAN1_GATE] = ma35d1_clk_gate(dev, "can1_gate", "can1_div",
+					 clk_base + REG_CLK_SYSCLK0, 9);
+	hws[CAN2_MUX] = ma35d1_clk_mux(dev, "can2_mux", clk_base + REG_CLK_CLKSEL4,
+				       18, 1, can_sel_clks, ARRAY_SIZE(can_sel_clks));
+	hws[CAN2_DIV] = ma35d1_clk_divider_table(dev, "can2_div", "can2_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 8, 3, ip_div_table);
+	hws[CAN2_GATE] = ma35d1_clk_gate(dev, "can2_gate", "can2_div",
+					 clk_base + REG_CLK_SYSCLK0, 10);
+	hws[CAN3_MUX] = ma35d1_clk_mux(dev, "can3_mux", clk_base + REG_CLK_CLKSEL4,
+				       19, 1, can_sel_clks, ARRAY_SIZE(can_sel_clks));
+	hws[CAN3_DIV] = ma35d1_clk_divider_table(dev, "can3_div", "can3_mux",
+						 clk_base + REG_CLK_CLKDIV0,
+						 12, 3, ip_div_table);
+	hws[CAN3_GATE] = ma35d1_clk_gate(dev, "can3_gate", "can3_div",
+					 clk_base + REG_CLK_SYSCLK0, 11);
+
+	hws[SDH0_MUX] = ma35d1_clk_mux(dev, "sdh0_mux", clk_base + REG_CLK_CLKSEL0,
+				       16, 2, sdh_sel_clks, ARRAY_SIZE(sdh_sel_clks));
+	hws[SDH0_GATE] = ma35d1_clk_gate(dev, "sdh0_gate", "sdh0_mux",
+					 clk_base + REG_CLK_SYSCLK0, 16);
+	hws[SDH1_MUX] = ma35d1_clk_mux(dev, "sdh1_mux", clk_base + REG_CLK_CLKSEL0,
+				       18, 2, sdh_sel_clks, ARRAY_SIZE(sdh_sel_clks));
+	hws[SDH1_GATE] = ma35d1_clk_gate(dev, "sdh1_gate", "sdh1_mux",
+					 clk_base + REG_CLK_SYSCLK0, 17);
+
+	hws[NAND_GATE] = ma35d1_clk_gate(dev, "nand_gate", "hclk1",
+					 clk_base + REG_CLK_SYSCLK0, 18);
+
+	hws[USBD_GATE] = ma35d1_clk_gate(dev, "usbd_gate", "usbphy0",
+					 clk_base + REG_CLK_SYSCLK0, 19);
+	hws[USBH_GATE] = ma35d1_clk_gate(dev, "usbh_gate", "usbphy0",
+					 clk_base + REG_CLK_SYSCLK0, 20);
+	hws[HUSBH0_GATE] = ma35d1_clk_gate(dev, "husbh0_gate", "usbphy0",
+					   clk_base + REG_CLK_SYSCLK0, 21);
+	hws[HUSBH1_GATE] = ma35d1_clk_gate(dev, "husbh1_gate", "usbphy0",
+					   clk_base + REG_CLK_SYSCLK0, 22);
+
+	hws[GFX_MUX] = ma35d1_clk_mux(dev, "gfx_mux", clk_base + REG_CLK_CLKSEL0,
+				      26, 1, gfx_sel_clks, ARRAY_SIZE(gfx_sel_clks));
+	hws[GFX_GATE] = ma35d1_clk_gate(dev, "gfx_gate", "gfx_mux",
+					clk_base + REG_CLK_SYSCLK0, 24);
+	hws[VC8K_GATE] = ma35d1_clk_gate(dev, "vc8k_gate", "sysclk0_mux",
+					 clk_base + REG_CLK_SYSCLK0, 25);
+	hws[DCU_MUX] = ma35d1_clk_mux(dev, "dcu_mux", clk_base + REG_CLK_CLKSEL0,
+				      24, 1, dcu_sel_clks, ARRAY_SIZE(dcu_sel_clks));
+	hws[DCU_GATE] = ma35d1_clk_gate(dev, "dcu_gate", "dcu_mux",
+					clk_base + REG_CLK_SYSCLK0, 26);
+	hws[DCUP_DIV] = ma35d1_clk_divider_table(dev, "dcup_div", "vpll",
+						 clk_base + REG_CLK_CLKDIV0,
+						 16, 3, ip_div_table);
+
+	hws[EMAC0_GATE] = ma35d1_clk_gate(dev, "emac0_gate", "epll_div2",
+					  clk_base + REG_CLK_SYSCLK0, 27);
+	hws[EMAC1_GATE] = ma35d1_clk_gate(dev, "emac1_gate", "epll_div2",
+					  clk_base + REG_CLK_SYSCLK0, 28);
+
+	hws[CCAP0_MUX] = ma35d1_clk_mux(dev, "ccap0_mux", clk_base + REG_CLK_CLKSEL0,
+					12, 1, ccap_sel_clks, ARRAY_SIZE(ccap_sel_clks));
+	hws[CCAP0_DIV] = ma35d1_clk_divider(dev, "ccap0_div", "ccap0_mux",
+					    clk_base + REG_CLK_CLKDIV1, 8, 4);
+	hws[CCAP0_GATE] = ma35d1_clk_gate(dev, "ccap0_gate", "ccap0_div",
+					  clk_base + REG_CLK_SYSCLK0, 29);
+	hws[CCAP1_MUX] = ma35d1_clk_mux(dev, "ccap1_mux", clk_base + REG_CLK_CLKSEL0,
+					14, 1, ccap_sel_clks, ARRAY_SIZE(ccap_sel_clks));
+	hws[CCAP1_DIV] = ma35d1_clk_divider(dev, "ccap1_div", "ccap1_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    12, 4);
+	hws[CCAP1_GATE] = ma35d1_clk_gate(dev, "ccap1_gate", "ccap1_div",
+					  clk_base + REG_CLK_SYSCLK0, 30);
+
+	hws[PDMA0_GATE] = ma35d1_clk_gate(dev, "pdma0_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 0);
+	hws[PDMA1_GATE] = ma35d1_clk_gate(dev, "pdma1_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 1);
+	hws[PDMA2_GATE] = ma35d1_clk_gate(dev, "pdma2_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 2);
+	hws[PDMA3_GATE] = ma35d1_clk_gate(dev, "pdma3_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 3);
+
+	hws[WH0_GATE] = ma35d1_clk_gate(dev, "wh0_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 4);
+	hws[WH1_GATE] = ma35d1_clk_gate(dev, "wh1_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 5);
+
+	hws[HWS_GATE] = ma35d1_clk_gate(dev, "hws_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 6);
+
+	hws[EBI_GATE] = ma35d1_clk_gate(dev, "ebi_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 7);
+
+	hws[SRAM0_GATE] = ma35d1_clk_gate(dev, "sram0_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 8);
+	hws[SRAM1_GATE] = ma35d1_clk_gate(dev, "sram1_gate", "hclk0",
+					  clk_base + REG_CLK_SYSCLK1, 9);
+
+	hws[ROM_GATE] = ma35d1_clk_gate(dev, "rom_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 10);
+
+	hws[TRA_GATE] = ma35d1_clk_gate(dev, "tra_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 11);
+
+	hws[DBG_MUX] = ma35d1_clk_mux(dev, "dbg_mux", clk_base + REG_CLK_CLKSEL0,
+				      27, 1, dbg_sel_clks, ARRAY_SIZE(dbg_sel_clks));
+	hws[DBG_GATE] = ma35d1_clk_gate(dev, "dbg_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 12);
+
+	hws[CKO_MUX] = ma35d1_clk_mux(dev, "cko_mux", clk_base + REG_CLK_CLKSEL4,
+				      24, 4, cko_sel_clks, ARRAY_SIZE(cko_sel_clks));
+	hws[CKO_DIV] = ma35d1_clk_divider_pow2(dev, "cko_div", "cko_mux",
+					       clk_base + REG_CLK_CLKOCTL, 0, 4);
+	hws[CKO_GATE] = ma35d1_clk_gate(dev, "cko_gate", "cko_div",
+					clk_base + REG_CLK_SYSCLK1, 13);
+
+	hws[GTMR_GATE] = ma35d1_clk_gate(dev, "gtmr_gate", "hirc",
+					 clk_base + REG_CLK_SYSCLK1, 14);
+
+	hws[GPA_GATE] = ma35d1_clk_gate(dev, "gpa_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 16);
+	hws[GPB_GATE] = ma35d1_clk_gate(dev, "gpb_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 17);
+	hws[GPC_GATE] = ma35d1_clk_gate(dev, "gpc_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 18);
+	hws[GPD_GATE] = ma35d1_clk_gate(dev, "gpd_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 19);
+	hws[GPE_GATE] = ma35d1_clk_gate(dev, "gpe_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 20);
+	hws[GPF_GATE] = ma35d1_clk_gate(dev, "gpf_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 21);
+	hws[GPG_GATE] = ma35d1_clk_gate(dev, "gpg_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 22);
+	hws[GPH_GATE] = ma35d1_clk_gate(dev, "gph_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 23);
+	hws[GPI_GATE] = ma35d1_clk_gate(dev, "gpi_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 24);
+	hws[GPJ_GATE] = ma35d1_clk_gate(dev, "gpj_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 25);
+	hws[GPK_GATE] = ma35d1_clk_gate(dev, "gpk_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 26);
+	hws[GPL_GATE] = ma35d1_clk_gate(dev, "gpl_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 27);
+	hws[GPM_GATE] = ma35d1_clk_gate(dev, "gpm_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 28);
+	hws[GPN_GATE] = ma35d1_clk_gate(dev, "gpn_gate", "hclk0",
+					clk_base + REG_CLK_SYSCLK1, 29);
+
+	hws[TMR0_MUX] = ma35d1_clk_mux(dev, "tmr0_mux", clk_base + REG_CLK_CLKSEL1,
+				       0, 3, timer0_sel_clks,
+				       ARRAY_SIZE(timer0_sel_clks));
+	hws[TMR0_GATE] = ma35d1_clk_gate(dev, "tmr0_gate", "tmr0_mux",
+					 clk_base + REG_CLK_APBCLK0, 0);
+	hws[TMR1_MUX] = ma35d1_clk_mux(dev, "tmr1_mux", clk_base + REG_CLK_CLKSEL1,
+				       4, 3, timer1_sel_clks,
+				       ARRAY_SIZE(timer1_sel_clks));
+	hws[TMR1_GATE] = ma35d1_clk_gate(dev, "tmr1_gate", "tmr1_mux",
+					 clk_base + REG_CLK_APBCLK0, 1);
+	hws[TMR2_MUX] = ma35d1_clk_mux(dev, "tmr2_mux", clk_base + REG_CLK_CLKSEL1,
+				       8, 3, timer2_sel_clks,
+				       ARRAY_SIZE(timer2_sel_clks));
+	hws[TMR2_GATE] = ma35d1_clk_gate(dev, "tmr2_gate", "tmr2_mux",
+					 clk_base + REG_CLK_APBCLK0, 2);
+	hws[TMR3_MUX] = ma35d1_clk_mux(dev, "tmr3_mux", clk_base + REG_CLK_CLKSEL1,
+				       12, 3, timer3_sel_clks,
+				       ARRAY_SIZE(timer3_sel_clks));
+	hws[TMR3_GATE] = ma35d1_clk_gate(dev, "tmr3_gate", "tmr3_mux",
+					 clk_base + REG_CLK_APBCLK0, 3);
+	hws[TMR4_MUX] = ma35d1_clk_mux(dev, "tmr4_mux", clk_base + REG_CLK_CLKSEL1,
+				       16, 3, timer4_sel_clks,
+				       ARRAY_SIZE(timer4_sel_clks));
+	hws[TMR4_GATE] = ma35d1_clk_gate(dev, "tmr4_gate", "tmr4_mux",
+					 clk_base + REG_CLK_APBCLK0, 4);
+	hws[TMR5_MUX] = ma35d1_clk_mux(dev, "tmr5_mux", clk_base + REG_CLK_CLKSEL1,
+				       20, 3, timer5_sel_clks,
+				       ARRAY_SIZE(timer5_sel_clks));
+	hws[TMR5_GATE] = ma35d1_clk_gate(dev, "tmr5_gate", "tmr5_mux",
+					 clk_base + REG_CLK_APBCLK0, 5);
+	hws[TMR6_MUX] = ma35d1_clk_mux(dev, "tmr6_mux", clk_base + REG_CLK_CLKSEL1,
+				       24, 3, timer6_sel_clks,
+				       ARRAY_SIZE(timer6_sel_clks));
+	hws[TMR6_GATE] = ma35d1_clk_gate(dev, "tmr6_gate", "tmr6_mux",
+					 clk_base + REG_CLK_APBCLK0, 6);
+	hws[TMR7_MUX] = ma35d1_clk_mux(dev, "tmr7_mux", clk_base + REG_CLK_CLKSEL1,
+				       28, 3, timer7_sel_clks,
+				       ARRAY_SIZE(timer7_sel_clks));
+	hws[TMR7_GATE] = ma35d1_clk_gate(dev, "tmr7_gate", "tmr7_mux",
+					 clk_base + REG_CLK_APBCLK0, 7);
+	hws[TMR8_MUX] = ma35d1_clk_mux(dev, "tmr8_mux", clk_base + REG_CLK_CLKSEL2,
+				       0, 3, timer8_sel_clks,
+				       ARRAY_SIZE(timer8_sel_clks));
+	hws[TMR8_GATE] = ma35d1_clk_gate(dev, "tmr8_gate", "tmr8_mux",
+					 clk_base + REG_CLK_APBCLK0, 8);
+	hws[TMR9_MUX] = ma35d1_clk_mux(dev, "tmr9_mux", clk_base + REG_CLK_CLKSEL2,
+				       4, 3, timer9_sel_clks,
+				       ARRAY_SIZE(timer9_sel_clks));
+	hws[TMR9_GATE] = ma35d1_clk_gate(dev, "tmr9_gate", "tmr9_mux",
+					 clk_base + REG_CLK_APBCLK0, 9);
+	hws[TMR10_MUX] = ma35d1_clk_mux(dev, "tmr10_mux", clk_base + REG_CLK_CLKSEL2,
+					8, 3, timer10_sel_clks,
+					ARRAY_SIZE(timer10_sel_clks));
+	hws[TMR10_GATE] = ma35d1_clk_gate(dev, "tmr10_gate", "tmr10_mux",
+					  clk_base + REG_CLK_APBCLK0, 10);
+	hws[TMR11_MUX] = ma35d1_clk_mux(dev, "tmr11_mux", clk_base + REG_CLK_CLKSEL2,
+					12, 3, timer11_sel_clks,
+					ARRAY_SIZE(timer11_sel_clks));
+	hws[TMR11_GATE] = ma35d1_clk_gate(dev, "tmr11_gate", "tmr11_mux",
+					  clk_base + REG_CLK_APBCLK0, 11);
+
+	hws[UART0_MUX] = ma35d1_clk_mux(dev, "uart0_mux", clk_base + REG_CLK_CLKSEL2,
+					16, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART0_DIV] = ma35d1_clk_divider(dev, "uart0_div", "uart0_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    16, 4);
+	hws[UART0_GATE] = ma35d1_clk_gate(dev, "uart0_gate", "uart0_div",
+					  clk_base + REG_CLK_APBCLK0, 12);
+	hws[UART1_MUX] = ma35d1_clk_mux(dev, "uart1_mux", clk_base + REG_CLK_CLKSEL2,
+					18, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART1_DIV] = ma35d1_clk_divider(dev, "uart1_div", "uart1_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    20, 4);
+	hws[UART1_GATE] = ma35d1_clk_gate(dev, "uart1_gate", "uart1_div",
+					  clk_base + REG_CLK_APBCLK0, 13);
+	hws[UART2_MUX] = ma35d1_clk_mux(dev, "uart2_mux", clk_base + REG_CLK_CLKSEL2,
+					20, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART2_DIV] = ma35d1_clk_divider(dev, "uart2_div", "uart2_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    24, 4);
+	hws[UART2_GATE] = ma35d1_clk_gate(dev, "uart2_gate", "uart2_div",
+					  clk_base + REG_CLK_APBCLK0, 14);
+	hws[UART3_MUX] = ma35d1_clk_mux(dev, "uart3_mux", clk_base + REG_CLK_CLKSEL2,
+					22, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART3_DIV] = ma35d1_clk_divider(dev, "uart3_div", "uart3_mux",
+					    clk_base + REG_CLK_CLKDIV1,
+					    28, 4);
+	hws[UART3_GATE] = ma35d1_clk_gate(dev, "uart3_gate", "uart3_div",
+					  clk_base + REG_CLK_APBCLK0, 15);
+	hws[UART4_MUX] = ma35d1_clk_mux(dev, "uart4_mux", clk_base + REG_CLK_CLKSEL2,
+					24, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART4_DIV] = ma35d1_clk_divider(dev, "uart4_div", "uart4_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    0, 4);
+	hws[UART4_GATE] = ma35d1_clk_gate(dev, "uart4_gate", "uart4_div",
+					  clk_base + REG_CLK_APBCLK0, 16);
+	hws[UART5_MUX] = ma35d1_clk_mux(dev, "uart5_mux", clk_base + REG_CLK_CLKSEL2,
+					26, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART5_DIV] = ma35d1_clk_divider(dev, "uart5_div", "uart5_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    4, 4);
+	hws[UART5_GATE] = ma35d1_clk_gate(dev, "uart5_gate", "uart5_div",
+					  clk_base + REG_CLK_APBCLK0, 17);
+	hws[UART6_MUX] = ma35d1_clk_mux(dev, "uart6_mux", clk_base + REG_CLK_CLKSEL2,
+					28, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART6_DIV] = ma35d1_clk_divider(dev, "uart6_div", "uart6_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    8, 4);
+	hws[UART6_GATE] = ma35d1_clk_gate(dev, "uart6_gate", "uart6_div",
+					  clk_base + REG_CLK_APBCLK0, 18);
+	hws[UART7_MUX] = ma35d1_clk_mux(dev, "uart7_mux", clk_base + REG_CLK_CLKSEL2,
+					30, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART7_DIV] = ma35d1_clk_divider(dev, "uart7_div", "uart7_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    12, 4);
+	hws[UART7_GATE] = ma35d1_clk_gate(dev, "uart7_gate", "uart7_div",
+					  clk_base + REG_CLK_APBCLK0, 19);
+	hws[UART8_MUX] = ma35d1_clk_mux(dev, "uart8_mux", clk_base + REG_CLK_CLKSEL3,
+					0, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART8_DIV] = ma35d1_clk_divider(dev, "uart8_div", "uart8_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    16, 4);
+	hws[UART8_GATE] = ma35d1_clk_gate(dev, "uart8_gate", "uart8_div",
+					  clk_base + REG_CLK_APBCLK0, 20);
+	hws[UART9_MUX] = ma35d1_clk_mux(dev, "uart9_mux", clk_base + REG_CLK_CLKSEL3,
+					2, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART9_DIV] = ma35d1_clk_divider(dev, "uart9_div", "uart9_mux",
+					    clk_base + REG_CLK_CLKDIV2,
+					    20, 4);
+	hws[UART9_GATE] = ma35d1_clk_gate(dev, "uart9_gate", "uart9_div",
+					  clk_base + REG_CLK_APBCLK0, 21);
+	hws[UART10_MUX] = ma35d1_clk_mux(dev, "uart10_mux", clk_base + REG_CLK_CLKSEL3,
+					 4, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART10_DIV] = ma35d1_clk_divider(dev, "uart10_div", "uart10_mux",
+					     clk_base + REG_CLK_CLKDIV2,
+					     24, 4);
+	hws[UART10_GATE] = ma35d1_clk_gate(dev, "uart10_gate", "uart10_div",
+					   clk_base + REG_CLK_APBCLK0, 22);
+	hws[UART11_MUX] = ma35d1_clk_mux(dev, "uart11_mux", clk_base + REG_CLK_CLKSEL3,
+					 6, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART11_DIV] = ma35d1_clk_divider(dev, "uart11_div", "uart11_mux",
+					     clk_base + REG_CLK_CLKDIV2,
+					     28, 4);
+	hws[UART11_GATE] = ma35d1_clk_gate(dev, "uart11_gate", "uart11_div",
+					   clk_base + REG_CLK_APBCLK0, 23);
+	hws[UART12_MUX] = ma35d1_clk_mux(dev, "uart12_mux", clk_base + REG_CLK_CLKSEL3,
+					 8, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART12_DIV] = ma35d1_clk_divider(dev, "uart12_div", "uart12_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     0, 4);
+	hws[UART12_GATE] = ma35d1_clk_gate(dev, "uart12_gate", "uart12_div",
+					   clk_base + REG_CLK_APBCLK0, 24);
+	hws[UART13_MUX] = ma35d1_clk_mux(dev, "uart13_mux", clk_base + REG_CLK_CLKSEL3,
+					 10, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART13_DIV] = ma35d1_clk_divider(dev, "uart13_div", "uart13_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     4, 4);
+	hws[UART13_GATE] = ma35d1_clk_gate(dev, "uart13_gate", "uart13_div",
+					   clk_base + REG_CLK_APBCLK0, 25);
+	hws[UART14_MUX] = ma35d1_clk_mux(dev, "uart14_mux", clk_base + REG_CLK_CLKSEL3,
+					 12, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART14_DIV] = ma35d1_clk_divider(dev, "uart14_div", "uart14_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     8, 4);
+	hws[UART14_GATE] = ma35d1_clk_gate(dev, "uart14_gate", "uart14_div",
+					   clk_base + REG_CLK_APBCLK0, 26);
+	hws[UART15_MUX] = ma35d1_clk_mux(dev, "uart15_mux", clk_base + REG_CLK_CLKSEL3,
+					 14, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART15_DIV] = ma35d1_clk_divider(dev, "uart15_div", "uart15_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     12, 4);
+	hws[UART15_GATE] = ma35d1_clk_gate(dev, "uart15_gate", "uart15_div",
+					   clk_base + REG_CLK_APBCLK0, 27);
+	hws[UART16_MUX] = ma35d1_clk_mux(dev, "uart16_mux", clk_base + REG_CLK_CLKSEL3,
+					 16, 2, uart_sel_clks, ARRAY_SIZE(uart_sel_clks));
+	hws[UART16_DIV] = ma35d1_clk_divider(dev, "uart16_div", "uart16_mux",
+					     clk_base + REG_CLK_CLKDIV3,
+					     16, 4);
+	hws[UART16_GATE] = ma35d1_clk_gate(dev, "uart16_gate", "uart16_div",
+					   clk_base + REG_CLK_APBCLK0, 28);
+
+	hws[RTC_GATE] = ma35d1_clk_gate(dev, "rtc_gate", "lxt",
+					clk_base + REG_CLK_APBCLK0, 29);
+	hws[DDR_GATE] = ma35d1_clk_gate(dev, "ddr_gate", "ddrpll",
+					clk_base + REG_CLK_APBCLK0, 30);
+
+	hws[KPI_MUX] = ma35d1_clk_mux(dev, "kpi_mux", clk_base + REG_CLK_CLKSEL4,
+				      30, 1, kpi_sel_clks, ARRAY_SIZE(kpi_sel_clks));
+	hws[KPI_DIV] = ma35d1_clk_divider(dev, "kpi_div", "kpi_mux",
+					  clk_base + REG_CLK_CLKDIV4,
+					  24, 8);
+	hws[KPI_GATE] = ma35d1_clk_gate(dev, "kpi_gate", "kpi_div",
+					clk_base + REG_CLK_APBCLK0, 31);
+
+	hws[I2C0_GATE] = ma35d1_clk_gate(dev, "i2c0_gate", "pclk0",
+					 clk_base + REG_CLK_APBCLK1, 0);
+	hws[I2C1_GATE] = ma35d1_clk_gate(dev, "i2c1_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK1, 1);
+	hws[I2C2_GATE] = ma35d1_clk_gate(dev, "i2c2_gate", "pclk2",
+					 clk_base + REG_CLK_APBCLK1, 2);
+	hws[I2C3_GATE] = ma35d1_clk_gate(dev, "i2c3_gate", "pclk0",
+					 clk_base + REG_CLK_APBCLK1, 3);
+	hws[I2C4_GATE] = ma35d1_clk_gate(dev, "i2c4_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK1, 4);
+	hws[I2C5_GATE] = ma35d1_clk_gate(dev, "i2c5_gate", "pclk2",
+					 clk_base + REG_CLK_APBCLK1, 5);
+
+	hws[QSPI0_MUX] = ma35d1_clk_mux(dev, "qspi0_mux", clk_base + REG_CLK_CLKSEL4,
+					8, 2, qspi0_sel_clks, ARRAY_SIZE(qspi0_sel_clks));
+	hws[QSPI0_GATE] = ma35d1_clk_gate(dev, "qspi0_gate", "qspi0_mux",
+					  clk_base + REG_CLK_APBCLK1, 6);
+	hws[QSPI1_MUX] = ma35d1_clk_mux(dev, "qspi1_mux", clk_base + REG_CLK_CLKSEL4,
+					10, 2, qspi1_sel_clks, ARRAY_SIZE(qspi1_sel_clks));
+	hws[QSPI1_GATE] = ma35d1_clk_gate(dev, "qspi1_gate", "qspi1_mux",
+					  clk_base + REG_CLK_APBCLK1, 7);
+
+	hws[SMC0_MUX] = ma35d1_clk_mux(dev, "smc0_mux", clk_base + REG_CLK_CLKSEL4,
+					28, 1, smc_sel_clks, ARRAY_SIZE(smc_sel_clks));
+	hws[SMC0_DIV] = ma35d1_clk_divider(dev, "smc0_div", "smc0_mux",
+					   clk_base + REG_CLK_CLKDIV1,
+					   0, 4);
+	hws[SMC0_GATE] = ma35d1_clk_gate(dev, "smc0_gate", "smc0_div",
+					 clk_base + REG_CLK_APBCLK1, 12);
+	hws[SMC1_MUX] = ma35d1_clk_mux(dev, "smc1_mux", clk_base + REG_CLK_CLKSEL4,
+					 29, 1, smc_sel_clks, ARRAY_SIZE(smc_sel_clks));
+	hws[SMC1_DIV] = ma35d1_clk_divider(dev, "smc1_div", "smc1_mux",
+					   clk_base + REG_CLK_CLKDIV1,
+					   4, 4);
+	hws[SMC1_GATE] = ma35d1_clk_gate(dev, "smc1_gate", "smc1_div",
+					 clk_base + REG_CLK_APBCLK1, 13);
+
+	hws[WDT0_MUX] = ma35d1_clk_mux(dev, "wdt0_mux", clk_base + REG_CLK_CLKSEL3,
+				       20, 2, wdt0_sel_clks, ARRAY_SIZE(wdt0_sel_clks));
+	hws[WDT0_GATE] = ma35d1_clk_gate(dev, "wdt0_gate", "wdt0_mux",
+					 clk_base + REG_CLK_APBCLK1, 16);
+	hws[WDT1_MUX] = ma35d1_clk_mux(dev, "wdt1_mux", clk_base + REG_CLK_CLKSEL3,
+				       24, 2, wdt1_sel_clks, ARRAY_SIZE(wdt1_sel_clks));
+	hws[WDT1_GATE] = ma35d1_clk_gate(dev, "wdt1_gate", "wdt1_mux",
+					 clk_base + REG_CLK_APBCLK1, 17);
+	hws[WDT2_MUX] = ma35d1_clk_mux(dev, "wdt2_mux", clk_base + REG_CLK_CLKSEL3,
+				       28, 2, wdt2_sel_clks, ARRAY_SIZE(wdt2_sel_clks));
+	hws[WDT2_GATE] = ma35d1_clk_gate(dev, "wdt2_gate", "wdt2_mux",
+				       clk_base + REG_CLK_APBCLK1, 18);
+
+	hws[WWDT0_MUX] = ma35d1_clk_mux(dev, "wwdt0_mux", clk_base + REG_CLK_CLKSEL3,
+					22, 2, wwdt0_sel_clks, ARRAY_SIZE(wwdt0_sel_clks));
+	hws[WWDT1_MUX] = ma35d1_clk_mux(dev, "wwdt1_mux", clk_base + REG_CLK_CLKSEL3,
+					26, 2, wwdt1_sel_clks, ARRAY_SIZE(wwdt1_sel_clks));
+	hws[WWDT2_MUX] = ma35d1_clk_mux(dev, "wwdt2_mux", clk_base + REG_CLK_CLKSEL3,
+					30, 2, wwdt2_sel_clks, ARRAY_SIZE(wwdt2_sel_clks));
+
+	hws[EPWM0_GATE] = ma35d1_clk_gate(dev, "epwm0_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK1, 24);
+	hws[EPWM1_GATE] = ma35d1_clk_gate(dev, "epwm1_gate", "pclk2",
+					  clk_base + REG_CLK_APBCLK1, 25);
+	hws[EPWM2_GATE] = ma35d1_clk_gate(dev, "epwm2_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK1, 26);
+
+	hws[I2S0_MUX] = ma35d1_clk_mux(dev, "i2s0_mux", clk_base + REG_CLK_CLKSEL4,
+				       12, 2, i2s0_sel_clks, ARRAY_SIZE(i2s0_sel_clks));
+	hws[I2S0_GATE] = ma35d1_clk_gate(dev, "i2s0_gate", "i2s0_mux",
+					 clk_base + REG_CLK_APBCLK2, 0);
+	hws[I2S1_MUX] = ma35d1_clk_mux(dev, "i2s1_mux", clk_base + REG_CLK_CLKSEL4,
+				       14, 2, i2s1_sel_clks, ARRAY_SIZE(i2s1_sel_clks));
+	hws[I2S1_GATE] = ma35d1_clk_gate(dev, "i2s1_gate", "i2s1_mux",
+					 clk_base + REG_CLK_APBCLK2, 1);
+
+	hws[SSMCC_GATE] = ma35d1_clk_gate(dev, "ssmcc_gate", "pclk3",
+					  clk_base + REG_CLK_APBCLK2, 2);
+	hws[SSPCC_GATE] = ma35d1_clk_gate(dev, "sspcc_gate", "pclk3",
+					  clk_base + REG_CLK_APBCLK2, 3);
+
+	hws[SPI0_MUX] = ma35d1_clk_mux(dev, "spi0_mux", clk_base + REG_CLK_CLKSEL4,
+				       0, 2, spi0_sel_clks, ARRAY_SIZE(spi0_sel_clks));
+	hws[SPI0_GATE] = ma35d1_clk_gate(dev, "spi0_gate", "spi0_mux",
+					 clk_base + REG_CLK_APBCLK2, 4);
+	hws[SPI1_MUX] = ma35d1_clk_mux(dev, "spi1_mux", clk_base + REG_CLK_CLKSEL4,
+				       2, 2, spi1_sel_clks, ARRAY_SIZE(spi1_sel_clks));
+	hws[SPI1_GATE] = ma35d1_clk_gate(dev, "spi1_gate", "spi1_mux",
+					 clk_base + REG_CLK_APBCLK2, 5);
+	hws[SPI2_MUX] = ma35d1_clk_mux(dev, "spi2_mux", clk_base + REG_CLK_CLKSEL4,
+				       4, 2, spi2_sel_clks, ARRAY_SIZE(spi2_sel_clks));
+	hws[SPI2_GATE] = ma35d1_clk_gate(dev, "spi2_gate", "spi2_mux",
+					 clk_base + REG_CLK_APBCLK2, 6);
+	hws[SPI3_MUX] = ma35d1_clk_mux(dev, "spi3_mux", clk_base + REG_CLK_CLKSEL4,
+				       6, 2, spi3_sel_clks, ARRAY_SIZE(spi3_sel_clks));
+	hws[SPI3_GATE] = ma35d1_clk_gate(dev, "spi3_gate", "spi3_mux",
+					 clk_base + REG_CLK_APBCLK2, 7);
+
+	hws[ECAP0_GATE] = ma35d1_clk_gate(dev, "ecap0_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK2, 8);
+	hws[ECAP1_GATE] = ma35d1_clk_gate(dev, "ecap1_gate", "pclk2",
+					  clk_base + REG_CLK_APBCLK2, 9);
+	hws[ECAP2_GATE] = ma35d1_clk_gate(dev, "ecap2_gate", "pclk1",
+					  clk_base + REG_CLK_APBCLK2, 10);
+
+	hws[QEI0_GATE] = ma35d1_clk_gate(dev, "qei0_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK2, 12);
+	hws[QEI1_GATE] = ma35d1_clk_gate(dev, "qei1_gate", "pclk2",
+					 clk_base + REG_CLK_APBCLK2, 13);
+	hws[QEI2_GATE] = ma35d1_clk_gate(dev, "qei2_gate", "pclk1",
+					 clk_base + REG_CLK_APBCLK2, 14);
+
+	hws[ADC_DIV] = ma35d1_reg_adc_clkdiv(dev, "adc_div", hws[PCLK0],
+					     &ma35d1_lock, 0,
+					     clk_base + REG_CLK_CLKDIV4,
+					     4, 17, 0x1ffff);
+	hws[ADC_GATE] = ma35d1_clk_gate(dev, "adc_gate", "adc_div",
+					clk_base + REG_CLK_APBCLK2, 24);
+
+	hws[EADC_DIV] = ma35d1_clk_divider_table(dev, "eadc_div", "pclk2",
+						 clk_base + REG_CLK_CLKDIV4,
+						 0, 4, eadc_div_table);
+	hws[EADC_GATE] = ma35d1_clk_gate(dev, "eadc_gate", "eadc_div",
+					 clk_base + REG_CLK_APBCLK2, 25);
+
+	return devm_of_clk_add_hw_provider(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");
-- 
2.34.1

[PATCH v12 09/10] reset: Add Nuvoton ma35d1 reset driver support

[Jacky Huang]

From: Jacky Huang <ychuang3@nuvoton.com>

This driver supports individual IP reset for the MA35D1. The reset
control registers are a subset of the system control registers.

Signed-off-by: Jacky Huang <ychuang3@nuvoton.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/reset/Kconfig        |   6 +
 drivers/reset/Makefile       |   1 +
 drivers/reset/reset-ma35d1.c | 235 +++++++++++++++++++++++++++++++++++
 3 files changed, 242 insertions(+)
 create mode 100644 drivers/reset/reset-ma35d1.c

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 6aa8f243b30c..07499177a266 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_MA35 || 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 7fec5af6c964..411b45ba0da7 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -21,6 +21,7 @@ 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..54e53863c98a
--- /dev/null
+++ b/drivers/reset/reset-ma35d1.c
@@ -0,0 +1,235 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Nuvoton Technology Corp.
+ * Author: Chi-Fang Li <cfli0@nuvoton.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/container_of.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/reset-controller.h>
+#include <linux/spinlock.h>
+#include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+
+struct ma35d1_reset_data {
+	struct reset_controller_dev rcdev;
+	struct notifier_block restart_handler;
+	void __iomem *base;
+	/* protect registers against concurrent read-modify-write */
+	spinlock_t lock;
+};
+
+static const struct {
+	u32 reg_ofs;
+	u32 bit;
+} ma35d1_reset_map[] = {
+	[MA35D1_RESET_CHIP] =    {0x20, 0},
+	[MA35D1_RESET_CA35CR0] = {0x20, 1},
+	[MA35D1_RESET_CA35CR1] = {0x20, 2},
+	[MA35D1_RESET_CM4] =     {0x20, 3},
+	[MA35D1_RESET_PDMA0] =   {0x20, 4},
+	[MA35D1_RESET_PDMA1] =   {0x20, 5},
+	[MA35D1_RESET_PDMA2] =   {0x20, 6},
+	[MA35D1_RESET_PDMA3] =   {0x20, 7},
+	[MA35D1_RESET_DISP] =    {0x20, 9},
+	[MA35D1_RESET_VCAP0] =   {0x20, 10},
+	[MA35D1_RESET_VCAP1] =   {0x20, 11},
+	[MA35D1_RESET_GFX] =     {0x20, 12},
+	[MA35D1_RESET_VDEC] =    {0x20, 13},
+	[MA35D1_RESET_WHC0] =    {0x20, 14},
+	[MA35D1_RESET_WHC1] =    {0x20, 15},
+	[MA35D1_RESET_GMAC0] =   {0x20, 16},
+	[MA35D1_RESET_GMAC1] =   {0x20, 17},
+	[MA35D1_RESET_HWSEM] =   {0x20, 18},
+	[MA35D1_RESET_EBI] =     {0x20, 19},
+	[MA35D1_RESET_HSUSBH0] = {0x20, 20},
+	[MA35D1_RESET_HSUSBH1] = {0x20, 21},
+	[MA35D1_RESET_HSUSBD] =  {0x20, 22},
+	[MA35D1_RESET_USBHL] =   {0x20, 23},
+	[MA35D1_RESET_SDH0] =    {0x20, 24},
+	[MA35D1_RESET_SDH1] =    {0x20, 25},
+	[MA35D1_RESET_NAND] =    {0x20, 26},
+	[MA35D1_RESET_GPIO] =    {0x20, 27},
+	[MA35D1_RESET_MCTLP] =   {0x20, 28},
+	[MA35D1_RESET_MCTLC] =   {0x20, 29},
+	[MA35D1_RESET_DDRPUB] =  {0x20, 30},
+	[MA35D1_RESET_TMR0] =    {0x24, 2},
+	[MA35D1_RESET_TMR1] =    {0x24, 3},
+	[MA35D1_RESET_TMR2] =    {0x24, 4},
+	[MA35D1_RESET_TMR3] =    {0x24, 5},
+	[MA35D1_RESET_I2C0] =    {0x24, 8},
+	[MA35D1_RESET_I2C1] =    {0x24, 9},
+	[MA35D1_RESET_I2C2] =    {0x24, 10},
+	[MA35D1_RESET_I2C3] =    {0x24, 11},
+	[MA35D1_RESET_QSPI0] =   {0x24, 12},
+	[MA35D1_RESET_SPI0] =    {0x24, 13},
+	[MA35D1_RESET_SPI1] =    {0x24, 14},
+	[MA35D1_RESET_SPI2] =    {0x24, 15},
+	[MA35D1_RESET_UART0] =   {0x24, 16},
+	[MA35D1_RESET_UART1] =   {0x24, 17},
+	[MA35D1_RESET_UART2] =   {0x24, 18},
+	[MA35D1_RESET_UART3] =   {0x24, 19},
+	[MA35D1_RESET_UART4] =   {0x24, 20},
+	[MA35D1_RESET_UART5] =   {0x24, 21},
+	[MA35D1_RESET_UART6] =   {0x24, 22},
+	[MA35D1_RESET_UART7] =   {0x24, 23},
+	[MA35D1_RESET_CANFD0] =  {0x24, 24},
+	[MA35D1_RESET_CANFD1] =  {0x24, 25},
+	[MA35D1_RESET_EADC0] =   {0x24, 28},
+	[MA35D1_RESET_I2S0] =    {0x24, 29},
+	[MA35D1_RESET_SC0] =     {0x28, 0},
+	[MA35D1_RESET_SC1] =     {0x28, 1},
+	[MA35D1_RESET_QSPI1] =   {0x28, 4},
+	[MA35D1_RESET_SPI3] =    {0x28, 6},
+	[MA35D1_RESET_EPWM0] =   {0x28, 16},
+	[MA35D1_RESET_EPWM1] =   {0x28, 17},
+	[MA35D1_RESET_QEI0] =    {0x28, 22},
+	[MA35D1_RESET_QEI1] =    {0x28, 23},
+	[MA35D1_RESET_ECAP0] =   {0x28, 26},
+	[MA35D1_RESET_ECAP1] =   {0x28, 27},
+	[MA35D1_RESET_CANFD2] =  {0x28, 28},
+	[MA35D1_RESET_ADC0] =    {0x28, 31},
+	[MA35D1_RESET_TMR4] =    {0x2C, 0},
+	[MA35D1_RESET_TMR5] =    {0x2C, 1},
+	[MA35D1_RESET_TMR6] =    {0x2C, 2},
+	[MA35D1_RESET_TMR7] =    {0x2C, 3},
+	[MA35D1_RESET_TMR8] =    {0x2C, 4},
+	[MA35D1_RESET_TMR9] =    {0x2C, 5},
+	[MA35D1_RESET_TMR10] =   {0x2C, 6},
+	[MA35D1_RESET_TMR11] =   {0x2C, 7},
+	[MA35D1_RESET_UART8] =   {0x2C, 8},
+	[MA35D1_RESET_UART9] =   {0x2C, 9},
+	[MA35D1_RESET_UART10] =  {0x2C, 10},
+	[MA35D1_RESET_UART11] =  {0x2C, 11},
+	[MA35D1_RESET_UART12] =  {0x2C, 12},
+	[MA35D1_RESET_UART13] =  {0x2C, 13},
+	[MA35D1_RESET_UART14] =  {0x2C, 14},
+	[MA35D1_RESET_UART15] =  {0x2C, 15},
+	[MA35D1_RESET_UART16] =  {0x2C, 16},
+	[MA35D1_RESET_I2S1] =    {0x2C, 17},
+	[MA35D1_RESET_I2C4] =    {0x2C, 18},
+	[MA35D1_RESET_I2C5] =    {0x2C, 19},
+	[MA35D1_RESET_EPWM2] =   {0x2C, 20},
+	[MA35D1_RESET_ECAP2] =   {0x2C, 21},
+	[MA35D1_RESET_QEI2] =    {0x2C, 22},
+	[MA35D1_RESET_CANFD3] =  {0x2C, 23},
+	[MA35D1_RESET_KPI] =     {0x2C, 24},
+	[MA35D1_RESET_GIC] =     {0x2C, 28},
+	[MA35D1_RESET_SSMCC] =   {0x2C, 30},
+	[MA35D1_RESET_SSPCC] =   {0x2C, 31}
+};
+
+static int ma35d1_restart_handler(struct notifier_block *this, unsigned long mode, void *cmd)
+{
+	struct ma35d1_reset_data *data =
+				 container_of(this, struct ma35d1_reset_data, restart_handler);
+	u32 id = MA35D1_RESET_CHIP;
+
+	writel_relaxed(BIT(ma35d1_reset_map[id].bit),
+		       data->base + ma35d1_reset_map[id].reg_ofs);
+	return 0;
+}
+
+static int ma35d1_reset_update(struct reset_controller_dev *rcdev, unsigned long id, bool assert)
+{
+	struct ma35d1_reset_data *data = container_of(rcdev, struct ma35d1_reset_data, rcdev);
+	unsigned long flags;
+	u32 reg;
+
+	if (WARN_ON_ONCE(id >= ARRAY_SIZE(ma35d1_reset_map)))
+		return -EINVAL;
+
+	spin_lock_irqsave(&data->lock, flags);
+	reg = readl_relaxed(data->base + ma35d1_reset_map[id].reg_ofs);
+	if (assert)
+		reg |= BIT(ma35d1_reset_map[id].bit);
+	else
+		reg &= ~(BIT(ma35d1_reset_map[id].bit));
+	writel_relaxed(reg, data->base + ma35d1_reset_map[id].reg_ofs);
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	return 0;
+}
+
+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)
+{
+	struct ma35d1_reset_data *data = container_of(rcdev, struct ma35d1_reset_data, rcdev);
+	u32 reg;
+
+	if (WARN_ON_ONCE(id >= ARRAY_SIZE(ma35d1_reset_map)))
+		return -EINVAL;
+
+	reg = readl_relaxed(data->base + ma35d1_reset_map[id].reg_ofs);
+	return !!(reg & BIT(ma35d1_reset_map[id].bit));
+}
+
+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)
+{
+	struct ma35d1_reset_data *reset_data;
+	struct device *dev = &pdev->dev;
+	int err;
+
+	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;
+
+	reset_data->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(reset_data->base))
+		return PTR_ERR(reset_data->base);
+
+	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;
+	reset_data->restart_handler.notifier_call = ma35d1_restart_handler;
+	reset_data->restart_handler.priority = 192;
+	spin_lock_init(&reset_data->lock);
+
+	err = register_restart_handler(&reset_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 v12 10/10] 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 | 801 +++++++++++++++++++++++++++++
 include/uapi/linux/serial_core.h   |   3 +
 4 files changed, 823 insertions(+)
 create mode 100644 drivers/tty/serial/ma35d1_serial.c

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 398e5aac2e77..85ac6fc1ff1d 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1555,6 +1555,24 @@ 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_MA35 || 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..0e823851c42c 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..c0a8c1e4ca0e
--- /dev/null
+++ b/drivers/tty/serial/ma35d1_serial.c
@@ -0,0 +1,801 @@
+// 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>
+#include <linux/units.h>
+
+#define MA35_UART_NR		17
+
+#define MA35_RBR_REG		0x00
+#define MA35_THR_REG		0x00
+#define MA35_IER_REG		0x04
+#define MA35_FCR_REG		0x08
+#define MA35_LCR_REG		0x0C
+#define MA35_MCR_REG		0x10
+#define MA35_MSR_REG		0x14
+#define MA35_FSR_REG		0x18
+#define MA35_ISR_REG		0x1C
+#define MA35_TOR_REG		0x20
+#define MA35_BAUD_REG		0x24
+#define MA35_ALTCTL_REG		0x2C
+#define MA35_FUN_SEL_REG	0x30
+#define MA35_WKCTL_REG		0x40
+#define MA35_WKSTS_REG		0x44
+
+/* MA35_IER_REG - Interrupt Enable Register */
+#define MA35_IER_RDA_IEN	BIT(0)  /* RBR Available Interrupt Enable */
+#define MA35_IER_THRE_IEN	BIT(1)  /* THR Empty Interrupt Enable */
+#define MA35_IER_RLS_IEN	BIT(2)  /* RX Line Status Interrupt Enable */
+#define MA35_IER_RTO_IEN	BIT(4)  /* RX Time-out Interrupt Enable */
+#define MA35_IER_BUFERR_IEN	BIT(5)  /* Buffer Error Interrupt Enable */
+#define MA35_IER_TIME_OUT_EN	BIT(11) /* RX Buffer Time-out Counter Enable */
+#define MA35_IER_AUTO_RTS	BIT(12) /* nRTS Auto-flow Control Enable */
+#define MA35_IER_AUTO_CTS	BIT(13) /* nCTS Auto-flow Control Enable */
+
+/* MA35_FCR_REG - FIFO Control Register */
+#define MA35_FCR_RFR		BIT(1)  /* RX Field Software Reset */
+#define MA35_FCR_TFR		BIT(2)  /* TX Field Software Reset */
+#define MA35_FCR_RFITL_MASK	GENMASK(7, 4) /* RX FIFO Interrupt Trigger Level */
+#define MA35_FCR_RFITL_1BYTE	FIELD_PREP(MA35_FCR_RFITL_MASK, 0)
+#define MA35_FCR_RFITL_4BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 1)
+#define MA35_FCR_RFITL_8BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 2)
+#define MA35_FCR_RFITL_14BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 3)
+#define MA35_FCR_RFITL_30BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 4)
+#define MA35_FCR_RTSTL_MASK	GENMASK(19, 16) /* nRTS Trigger Level */
+#define MA35_FCR_RTSTL_1BYTE	FIELD_PREP(MA35_FCR_RTSTL_MASK, 0)
+#define MA35_FCR_RTSTL_4BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 1)
+#define MA35_FCR_RTSTL_8BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 2)
+#define MA35_FCR_RTSTL_14BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 3)
+#define MA35_FCR_RTSTLL_30BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 4)
+
+/* MA35_LCR_REG - Line Control Register */
+#define	MA35_LCR_NSB		BIT(2)  /* Number of “STOP Bit” */
+#define MA35_LCR_PBE		BIT(3)  /* Parity Bit Enable */
+#define MA35_LCR_EPE		BIT(4)  /* Even Parity Enable */
+#define MA35_LCR_SPE		BIT(5)  /* Stick Parity Enable */
+#define MA35_LCR_BREAK		BIT(6)  /* Break Control */
+#define MA35_LCR_WLS_MASK	GENMASK(1, 0) /* Word Length Selection */
+#define MA35_LCR_WLS_5BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 0)
+#define MA35_LCR_WLS_6BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 1)
+#define MA35_LCR_WLS_7BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 2)
+#define MA35_LCR_WLS_8BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 3)
+
+/* MA35_MCR_REG - Modem Control Register */
+#define MA35_MCR_RTS_CTRL	BIT(1)  /* nRTS Signal Control */
+#define MA35_MCR_RTSACTLV	BIT(9)  /* nRTS Pin Active Level */
+#define MA35_MCR_RTSSTS		BIT(13) /* nRTS Pin Status (Read Only) */
+
+/* MA35_MSR_REG - Modem Status Register */
+#define MA35_MSR_CTSDETF	BIT(0)  /* Detect nCTS State Change Flag */
+#define MA35_MSR_CTSSTS		BIT(4)  /* nCTS Pin Status (Read Only) */
+#define MA35_MSR_CTSACTLV	BIT(8)  /* nCTS Pin Active Level */
+
+/* MA35_FSR_REG - FIFO Status Register */
+#define MA35_FSR_RX_OVER_IF	BIT(0)  /* RX Overflow Error Interrupt Flag */
+#define MA35_FSR_PEF		BIT(4)  /* Parity Error Flag*/
+#define MA35_FSR_FEF		BIT(5)  /* Framing Error Flag */
+#define MA35_FSR_BIF		BIT(6)  /* Break Interrupt Flag */
+#define MA35_FSR_RX_EMPTY	BIT(14) /* Receiver FIFO Empty (Read Only) */
+#define MA35_FSR_RX_FULL	BIT(15) /* Receiver FIFO Full (Read Only) */
+#define MA35_FSR_TX_EMPTY	BIT(22) /* Transmitter FIFO Empty (Read Only) */
+#define MA35_FSR_TX_FULL	BIT(23) /* Transmitter FIFO Full (Read Only) */
+#define MA35_FSR_TX_OVER_IF	BIT(24) /* TX Overflow Error Interrupt Flag */
+#define MA35_FSR_TE_FLAG	BIT(28) /* Transmitter Empty Flag (Read Only) */
+#define MA35_FSR_RXPTR_MSK	GENMASK(13, 8) /* TX FIFO Pointer mask */
+#define MA35_FSR_TXPTR_MSK	GENMASK(21, 16) /* RX FIFO Pointer mask */
+
+/* MA35_ISR_REG - Interrupt Status Register */
+#define MA35_ISR_RDA_IF		BIT(0)  /* RBR Available Interrupt Flag */
+#define MA35_ISR_THRE_IF	BIT(1)  /* THR Empty Interrupt Flag */
+#define MA35_ISR_RLSIF		BIT(2)  /* Receive Line Interrupt Flag */
+#define MA35_ISR_MODEMIF	BIT(3)  /* MODEM Interrupt Flag */
+#define MA35_ISR_RXTO_IF	BIT(4)  /* RX Time-out Interrupt Flag */
+#define MA35_ISR_BUFEIF		BIT(5)  /* Buffer Error Interrupt Flag */
+#define MA35_ISR_WK_IF		BIT(6)  /* UART Wake-up Interrupt Flag */
+#define MA35_ISR_RDAINT		BIT(8)  /* RBR Available Interrupt Indicator */
+#define MA35_ISR_THRE_INT	BIT(9)  /* THR Empty Interrupt Indicator */
+#define MA35_ISR_ALL		0xFFFFFFFF
+
+/* MA35_BAUD_REG - Baud Rate Divider Register */
+#define	MA35_BAUD_MODE_MASK	GENMASK(29, 28)
+#define MA35_BAUD_MODE0		FIELD_PREP(MA35_BAUD_MODE_MASK, 0)
+#define MA35_BAUD_MODE1		FIELD_PREP(MA35_BAUD_MODE_MASK, 2)
+#define MA35_BAUD_MODE2		FIELD_PREP(MA35_BAUD_MODE_MASK, 3)
+#define	MA35_BAUD_MASK		GENMASK(15, 0)
+
+/* MA35_ALTCTL_REG - Alternate Control/Status Register */
+#define MA35_ALTCTL_RS485AUD	BIT(10) /* RS-485 Auto Direction Function */
+
+/* MA35_FUN_SEL_REG - Function Select Register */
+#define MA35_FUN_SEL_MASK	GENMASK(2, 0)
+#define MA35_FUN_SEL_UART	FIELD_PREP(MA35_FUN_SEL_MASK, 0)
+#define MA35_FUN_SEL_RS485	FIELD_PREP(MA35_FUN_SEL_MASK, 3)
+
+/* The constrain for MA35D1 UART baud rate divider */
+#define MA35_BAUD_DIV_MAX	0xFFFF
+#define MA35_BAUD_DIV_MIN	11
+
+/* UART FIFO depth */
+#define MA35_UART_FIFO_DEPTH	32
+/* UART console clock */
+#define MA35_UART_CONSOLE_CLK	(24 * HZ_PER_MHZ)
+/* UART register ioremap size */
+#define MA35_UART_REG_SIZE	0x100
+/* Rx Timeout */
+#define MA35_UART_RX_TOUT	0x40
+
+#define MA35_ISR_IF_CHECK	(MA35_ISR_RDA_IF | MA35_ISR_RXTO_IF | \
+				 MA35_ISR_THRE_INT | MA35_ISR_BUFEIF)
+
+static struct uart_driver ma35d1serial_reg;
+
+struct uart_ma35d1_port {
+	struct uart_port port;
+	struct clk *clk;
+	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 uart_ma35d1_port ma35d1serial_ports[MA35_UART_NR];
+
+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, MA35_IER_REG);
+	if (ier & MA35_IER_THRE_IEN)
+		serial_out(p, MA35_IER_REG, ier & ~MA35_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)
+{
+	u32 count;
+	u8 ch;
+
+	if (uart_tx_stopped(&up->port)) {
+		ma35d1serial_stop_tx(&up->port);
+		return;
+	}
+	count = MA35_UART_FIFO_DEPTH - FIELD_GET(MA35_FSR_TXPTR_MSK,
+						 serial_in(up, MA35_FSR_REG));
+	uart_port_tx_limited(&up->port, ch, count,
+			     !(serial_in(up, MA35_FSR_REG) & MA35_FSR_TX_FULL),
+			     serial_out(up, MA35_THR_REG, ch),
+			     ({}));
+}
+
+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, MA35_IER_REG);
+	serial_out(up, MA35_IER_REG, ier & ~MA35_IER_THRE_IEN);
+	transmit_chars(up);
+	serial_out(up, MA35_IER_REG, ier | MA35_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, MA35_IER_REG, serial_in(up, MA35_IER_REG) & ~MA35_IER_RDA_IEN);
+}
+
+static void receive_chars(struct uart_ma35d1_port *up)
+{
+	u8 ch, flag;
+	u32 fsr;
+	int max_count = 256;
+
+	fsr = serial_in(up, MA35_FSR_REG);
+	do {
+		flag = TTY_NORMAL;
+		up->port.icount.rx++;
+
+		if (unlikely(fsr & (MA35_FSR_BIF | MA35_FSR_FEF |
+				    MA35_FSR_PEF | MA35_FSR_RX_OVER_IF))) {
+			if (fsr & MA35_FSR_BIF) {
+				up->port.icount.brk++;
+				if (uart_handle_break(&up->port))
+					continue;
+			}
+			if (fsr & MA35_FSR_FEF)
+				up->port.icount.frame++;
+			if (fsr & MA35_FSR_PEF)
+				up->port.icount.parity++;
+			if (fsr & MA35_FSR_RX_OVER_IF)
+				up->port.icount.overrun++;
+
+			serial_out(up, MA35_FSR_REG,
+				   fsr & (MA35_FSR_BIF | MA35_FSR_FEF |
+					  MA35_FSR_PEF | MA35_FSR_RX_OVER_IF));
+			if (fsr & MA35_FSR_BIF)
+				flag = TTY_BREAK;
+			else if (fsr & MA35_FSR_PEF)
+				flag = TTY_PARITY;
+			else if (fsr & MA35_FSR_FEF)
+				flag = TTY_FRAME;
+		}
+
+		ch = serial_in(up, MA35_RBR_REG);
+		if (uart_handle_sysrq_char(&up->port, ch))
+			continue;
+
+		spin_lock(&up->port.lock);
+		uart_insert_char(&up->port, fsr, MA35_FSR_RX_OVER_IF, ch, flag);
+		spin_unlock(&up->port.lock);
+
+		fsr = serial_in(up, MA35_FSR_REG);
+	} while (!(fsr & MA35_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, MA35_ISR_REG);
+	fsr = serial_in(up, MA35_FSR_REG);
+
+	if (!(isr & MA35_ISR_IF_CHECK))
+		return IRQ_NONE;
+
+	if (isr & (MA35_ISR_RDA_IF | MA35_ISR_RXTO_IF))
+		receive_chars(up);
+	if (isr & MA35_ISR_THRE_INT)
+		transmit_chars(up);
+	if (fsr & MA35_FSR_TX_OVER_IF)
+		serial_out(up, MA35_FSR_REG, MA35_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, MA35_FSR_REG);
+	return (fsr & (MA35_FSR_TE_FLAG | MA35_FSR_TX_EMPTY)) ==
+		(MA35_FSR_TE_FLAG | MA35_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, MA35_MSR_REG);
+	if (!(status & MA35_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;
+	u32 ier;
+
+	mcr = serial_in(up, MA35_MCR_REG);
+	mcr &= ~MA35_MCR_RTS_CTRL;
+
+	if (mctrl & TIOCM_RTS)
+		mcr |= MA35_MCR_RTSACTLV;
+	else
+		mcr &= ~MA35_MCR_RTSACTLV;
+
+	if (up->mcr & UART_MCR_AFE) {
+		serial_out(up, MA35_IER_REG, (serial_in(up, MA35_IER_REG) |
+					     MA35_IER_AUTO_RTS |
+					     MA35_IER_AUTO_CTS));
+		up->port.flags |= UPF_HARD_FLOW;
+	} else {
+		ier = serial_in(up, MA35_IER_REG);
+		ier &= ~(MA35_IER_AUTO_RTS | MA35_IER_AUTO_CTS);
+		serial_out(up, MA35_IER_REG, ier);
+		up->port.flags &= ~UPF_HARD_FLOW;
+	}
+	serial_out(up, MA35_MSR_REG, (serial_in(up, MA35_MSR_REG) |
+				     MA35_MSR_CTSACTLV));
+	serial_out(up, MA35_MCR_REG, 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, MA35_LCR_REG);
+	if (break_state != 0)
+		lcr |= MA35_LCR_BREAK;
+	else
+		lcr &= ~MA35_LCR_BREAK;
+	serial_out(up, MA35_LCR_REG, 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, MA35_FCR_REG, MA35_FCR_TFR | MA35_FCR_RFR);
+
+	/* Clear pending interrupts */
+	serial_out(up, MA35_ISR_REG, MA35_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, MA35_FCR_REG, serial_in(up, MA35_FCR_REG) |
+		   MA35_FCR_RFITL_4BYTES | MA35_FCR_RTSTL_8BYTES);
+	serial_out(up, MA35_LCR_REG, MA35_LCR_WLS_8BITS);
+	serial_out(up, MA35_TOR_REG, MA35_UART_RX_TOUT);
+	serial_out(up, MA35_IER_REG, MA35_IER_RTO_IEN | MA35_IER_RDA_IEN |
+		   MA35_IER_TIME_OUT_EN | MA35_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, MA35_IER_REG, 0);
+	free_irq(port->irq, port);
+}
+
+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 |= MA35_LCR_NSB;
+	if (termios->c_cflag & PARENB)
+		lcr |= MA35_LCR_PBE;
+	if (!(termios->c_cflag & PARODD))
+		lcr |= MA35_LCR_EPE;
+	if (termios->c_cflag & CMSPAR)
+		lcr |= MA35_LCR_SPE;
+
+	baud = uart_get_baud_rate(port, termios, old,
+				  port->uartclk / MA35_BAUD_DIV_MAX,
+				  port->uartclk / MA35_BAUD_DIV_MIN);
+
+	/* MA35D1 UART baud rate equation: baudrate = UART_CLK / (quot + 2) */
+	quot = (port->uartclk / baud) - 2;
+
+	/*
+	 * 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 = MA35_FSR_RX_OVER_IF;
+	if (termios->c_iflag & INPCK)
+		up->port.read_status_mask |= MA35_FSR_FEF | MA35_FSR_PEF;
+	if (termios->c_iflag & (BRKINT | PARMRK))
+		up->port.read_status_mask |= MA35_FSR_BIF;
+
+	/* Characteres to ignore */
+	up->port.ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		up->port.ignore_status_mask |= MA35_FSR_FEF | MA35_FSR_PEF;
+	if (termios->c_iflag & IGNBRK) {
+		up->port.ignore_status_mask |= MA35_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 |= MA35_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, MA35_BAUD_REG, MA35_BAUD_MODE2 | FIELD_PREP(MA35_BAUD_MASK, quot));
+
+	serial_out(up, MA35_LCR_REG, lcr);
+
+	spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static const char *ma35d1serial_type(struct uart_port *port)
+{
+	return port->type == PORT_MA35 ? "ma35d1-uart" : NULL;
+}
+
+static void ma35d1serial_config_port(struct uart_port *port, int flags)
+{
+	if (flags & UART_CONFIG_TYPE)
+		port->type = PORT_MA35;
+}
+
+static int ma35d1serial_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	if (port->type != PORT_UNKNOWN && ser->type != PORT_MA35)
+		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 struct device_node *ma35d1serial_uart_nodes[MA35_UART_NR];
+
+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, MA35_FSR_REG) & MA35_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, MA35_THR_REG, 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;
+
+	spin_lock_irqsave(&up->port.lock, flags);
+
+	/*
+	 *  First save the IER then disable the interrupts
+	 */
+	ier = serial_in(up, MA35_IER_REG);
+	serial_out(up, MA35_IER_REG, 0);
+
+	uart_console_write(&up->port, s, count, ma35d1serial_console_putchar);
+
+	wait_for_xmitr(up);
+	serial_out(up, MA35_IER_REG, ier);
+
+	spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static int __init ma35d1serial_console_setup(struct console *co, char *options)
+{
+	struct device_node *np;
+	struct uart_ma35d1_port *p;
+	u32 val32[4];
+	struct uart_port *port;
+	int baud = 115200;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+
+	if ((co->index < 0) || (co->index >= MA35_UART_NR)) {
+		pr_debug("Console Port%x out of range\n", co->index);
+		return -EINVAL;
+	}
+
+	np = ma35d1serial_uart_nodes[co->index];
+	p = &ma35d1serial_ports[co->index];
+	if (!np || !p)
+		return -ENODEV;
+
+	if (of_property_read_u32_array(np, "reg", val32, ARRAY_SIZE(val32)) != 0)
+		return -EINVAL;
+
+	p->port.iobase = val32[1];
+	p->port.membase = ioremap(p->port.iobase, MA35_UART_REG_SIZE);
+	if (!p->port.membase)
+		return -ENOMEM;
+
+	p->port.ops = &ma35d1serial_ops;
+	p->port.line = 0;
+	p->port.uartclk = MA35_UART_CONSOLE_CLK;
+
+	port = &ma35d1serial_ports[co->index].port;
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+static struct console ma35d1serial_console = {
+	.name    = "ttyNVT",
+	.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)
+{
+	u32 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 == MA35_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     = "ttyNVT",
+	.major        = TTY_MAJOR,
+	.minor        = 64,
+	.cons         = MA35D1SERIAL_CONSOLE,
+	.nr           = MA35_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 = 0;
+
+	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, MA35_UART_REG_SIZE);
+	up->port.ops = &ma35d1serial_ops;
+
+	spin_lock_init(&up->port.lock);
+
+	up->clk = of_clk_get(pdev->dev.of_node, 0);
+	if (IS_ERR(up->clk)) {
+		ret = PTR_ERR(up->clk);
+		dev_err(&pdev->dev, "failed to get core clk: %d\n", ret);
+		goto err_iounmap;
+	}
+
+	ret = clk_prepare_enable(up->clk);
+	if (ret)
+		goto err_iounmap;
+
+	if (up->port.line != 0)
+		up->port.uartclk = clk_get_rate(up->clk);
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		goto err_clk_disable;
+
+	up->port.irq = ret;
+	up->port.dev = &pdev->dev;
+	up->port.flags = UPF_BOOT_AUTOCONF;
+
+	platform_set_drvdata(pdev, up);
+
+	ret = uart_add_one_port(&ma35d1serial_reg, &up->port);
+	if (ret < 0)
+		goto err_free_irq;
+
+	return 0;
+
+err_free_irq:
+	free_irq(up->port.irq, &up->port);
+
+err_clk_disable:
+	clk_disable_unprepare(up->clk);
+
+err_iounmap:
+	iounmap(up->port.membase);
+	return ret;
+}
+
+/*
+ * Remove serial ports registered against a platform device.
+ */
+static int ma35d1serial_remove(struct platform_device *dev)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	uart_remove_one_port(&ma35d1serial_reg, port);
+	clk_disable_unprepare(up->clk);
+	return 0;
+}
+
+static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	uart_suspend_port(&ma35d1serial_reg, &up->port);
+	if (up->port.line == 0) {
+		up->console_baud_rate = serial_in(up, MA35_BAUD_REG);
+		up->console_line = serial_in(up, MA35_LCR_REG);
+		up->console_int = serial_in(up, MA35_IER_REG);
+	}
+	return 0;
+}
+
+static int ma35d1serial_resume(struct platform_device *dev)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
+
+	if (up->port.line == 0) {
+		serial_out(up, MA35_BAUD_REG, up->console_baud_rate);
+		serial_out(up, MA35_LCR_REG, up->console_line);
+		serial_out(up, MA35_IER_REG, up->console_int);
+	}
+	uart_resume_port(&ma35d1serial_reg, &up->port);
+	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");
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 281fa286555c..c11600bb1b0d 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -279,4 +279,7 @@
 /* Sunplus UART */
 #define PORT_SUNPLUS	123
 
+/* Nuvoton MA35 SoC */
+#define PORT_MA35	124
+
 #endif /* _UAPILINUX_SERIAL_CORE_H */
-- 
2.34.1

Re: [PATCH v12 10/10] tty: serial: Add Nuvoton ma35d1 serial driver support

[Ilpo Järvinen]

[-- Attachment #1: Type: text/plain, Size: 28256 bytes --]

On Tue, 30 May 2023, Jacky Huang wrote:

> 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 | 801 +++++++++++++++++++++++++++++
>  include/uapi/linux/serial_core.h   |   3 +
>  4 files changed, 823 insertions(+)
>  create mode 100644 drivers/tty/serial/ma35d1_serial.c
> 
> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
> index 398e5aac2e77..85ac6fc1ff1d 100644
> --- a/drivers/tty/serial/Kconfig
> +++ b/drivers/tty/serial/Kconfig
> @@ -1555,6 +1555,24 @@ 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_MA35 || 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..0e823851c42c 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..c0a8c1e4ca0e
> --- /dev/null
> +++ b/drivers/tty/serial/ma35d1_serial.c
> @@ -0,0 +1,801 @@
> +// 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>
> +#include <linux/units.h>
> +
> +#define MA35_UART_NR		17
> +
> +#define MA35_RBR_REG		0x00
> +#define MA35_THR_REG		0x00
> +#define MA35_IER_REG		0x04
> +#define MA35_FCR_REG		0x08
> +#define MA35_LCR_REG		0x0C
> +#define MA35_MCR_REG		0x10
> +#define MA35_MSR_REG		0x14
> +#define MA35_FSR_REG		0x18
> +#define MA35_ISR_REG		0x1C
> +#define MA35_TOR_REG		0x20
> +#define MA35_BAUD_REG		0x24
> +#define MA35_ALTCTL_REG		0x2C
> +#define MA35_FUN_SEL_REG	0x30
> +#define MA35_WKCTL_REG		0x40
> +#define MA35_WKSTS_REG		0x44
> +
> +/* MA35_IER_REG - Interrupt Enable Register */
> +#define MA35_IER_RDA_IEN	BIT(0)  /* RBR Available Interrupt Enable */
> +#define MA35_IER_THRE_IEN	BIT(1)  /* THR Empty Interrupt Enable */
> +#define MA35_IER_RLS_IEN	BIT(2)  /* RX Line Status Interrupt Enable */
> +#define MA35_IER_RTO_IEN	BIT(4)  /* RX Time-out Interrupt Enable */
> +#define MA35_IER_BUFERR_IEN	BIT(5)  /* Buffer Error Interrupt Enable */
> +#define MA35_IER_TIME_OUT_EN	BIT(11) /* RX Buffer Time-out Counter Enable */
> +#define MA35_IER_AUTO_RTS	BIT(12) /* nRTS Auto-flow Control Enable */
> +#define MA35_IER_AUTO_CTS	BIT(13) /* nCTS Auto-flow Control Enable */
> +
> +/* MA35_FCR_REG - FIFO Control Register */
> +#define MA35_FCR_RFR		BIT(1)  /* RX Field Software Reset */
> +#define MA35_FCR_TFR		BIT(2)  /* TX Field Software Reset */
> +#define MA35_FCR_RFITL_MASK	GENMASK(7, 4) /* RX FIFO Interrupt Trigger Level */
> +#define MA35_FCR_RFITL_1BYTE	FIELD_PREP(MA35_FCR_RFITL_MASK, 0)
> +#define MA35_FCR_RFITL_4BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 1)
> +#define MA35_FCR_RFITL_8BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 2)
> +#define MA35_FCR_RFITL_14BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 3)
> +#define MA35_FCR_RFITL_30BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 4)
> +#define MA35_FCR_RTSTL_MASK	GENMASK(19, 16) /* nRTS Trigger Level */
> +#define MA35_FCR_RTSTL_1BYTE	FIELD_PREP(MA35_FCR_RTSTL_MASK, 0)
> +#define MA35_FCR_RTSTL_4BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 1)
> +#define MA35_FCR_RTSTL_8BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 2)
> +#define MA35_FCR_RTSTL_14BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 3)
> +#define MA35_FCR_RTSTLL_30BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 4)
> +
> +/* MA35_LCR_REG - Line Control Register */
> +#define	MA35_LCR_NSB		BIT(2)  /* Number of “STOP Bit” */
> +#define MA35_LCR_PBE		BIT(3)  /* Parity Bit Enable */
> +#define MA35_LCR_EPE		BIT(4)  /* Even Parity Enable */
> +#define MA35_LCR_SPE		BIT(5)  /* Stick Parity Enable */
> +#define MA35_LCR_BREAK		BIT(6)  /* Break Control */
> +#define MA35_LCR_WLS_MASK	GENMASK(1, 0) /* Word Length Selection */
> +#define MA35_LCR_WLS_5BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 0)
> +#define MA35_LCR_WLS_6BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 1)
> +#define MA35_LCR_WLS_7BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 2)
> +#define MA35_LCR_WLS_8BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 3)
> +
> +/* MA35_MCR_REG - Modem Control Register */
> +#define MA35_MCR_RTS_CTRL	BIT(1)  /* nRTS Signal Control */
> +#define MA35_MCR_RTSACTLV	BIT(9)  /* nRTS Pin Active Level */
> +#define MA35_MCR_RTSSTS		BIT(13) /* nRTS Pin Status (Read Only) */
> +
> +/* MA35_MSR_REG - Modem Status Register */
> +#define MA35_MSR_CTSDETF	BIT(0)  /* Detect nCTS State Change Flag */
> +#define MA35_MSR_CTSSTS		BIT(4)  /* nCTS Pin Status (Read Only) */
> +#define MA35_MSR_CTSACTLV	BIT(8)  /* nCTS Pin Active Level */
> +
> +/* MA35_FSR_REG - FIFO Status Register */
> +#define MA35_FSR_RX_OVER_IF	BIT(0)  /* RX Overflow Error Interrupt Flag */
> +#define MA35_FSR_PEF		BIT(4)  /* Parity Error Flag*/
> +#define MA35_FSR_FEF		BIT(5)  /* Framing Error Flag */
> +#define MA35_FSR_BIF		BIT(6)  /* Break Interrupt Flag */
> +#define MA35_FSR_RX_EMPTY	BIT(14) /* Receiver FIFO Empty (Read Only) */
> +#define MA35_FSR_RX_FULL	BIT(15) /* Receiver FIFO Full (Read Only) */
> +#define MA35_FSR_TX_EMPTY	BIT(22) /* Transmitter FIFO Empty (Read Only) */
> +#define MA35_FSR_TX_FULL	BIT(23) /* Transmitter FIFO Full (Read Only) */
> +#define MA35_FSR_TX_OVER_IF	BIT(24) /* TX Overflow Error Interrupt Flag */
> +#define MA35_FSR_TE_FLAG	BIT(28) /* Transmitter Empty Flag (Read Only) */
> +#define MA35_FSR_RXPTR_MSK	GENMASK(13, 8) /* TX FIFO Pointer mask */
> +#define MA35_FSR_TXPTR_MSK	GENMASK(21, 16) /* RX FIFO Pointer mask */
> +
> +/* MA35_ISR_REG - Interrupt Status Register */
> +#define MA35_ISR_RDA_IF		BIT(0)  /* RBR Available Interrupt Flag */
> +#define MA35_ISR_THRE_IF	BIT(1)  /* THR Empty Interrupt Flag */
> +#define MA35_ISR_RLSIF		BIT(2)  /* Receive Line Interrupt Flag */
> +#define MA35_ISR_MODEMIF	BIT(3)  /* MODEM Interrupt Flag */
> +#define MA35_ISR_RXTO_IF	BIT(4)  /* RX Time-out Interrupt Flag */
> +#define MA35_ISR_BUFEIF		BIT(5)  /* Buffer Error Interrupt Flag */
> +#define MA35_ISR_WK_IF		BIT(6)  /* UART Wake-up Interrupt Flag */
> +#define MA35_ISR_RDAINT		BIT(8)  /* RBR Available Interrupt Indicator */
> +#define MA35_ISR_THRE_INT	BIT(9)  /* THR Empty Interrupt Indicator */
> +#define MA35_ISR_ALL		0xFFFFFFFF
> +
> +/* MA35_BAUD_REG - Baud Rate Divider Register */
> +#define	MA35_BAUD_MODE_MASK	GENMASK(29, 28)
> +#define MA35_BAUD_MODE0		FIELD_PREP(MA35_BAUD_MODE_MASK, 0)
> +#define MA35_BAUD_MODE1		FIELD_PREP(MA35_BAUD_MODE_MASK, 2)
> +#define MA35_BAUD_MODE2		FIELD_PREP(MA35_BAUD_MODE_MASK, 3)
> +#define	MA35_BAUD_MASK		GENMASK(15, 0)
> +
> +/* MA35_ALTCTL_REG - Alternate Control/Status Register */
> +#define MA35_ALTCTL_RS485AUD	BIT(10) /* RS-485 Auto Direction Function */
> +
> +/* MA35_FUN_SEL_REG - Function Select Register */
> +#define MA35_FUN_SEL_MASK	GENMASK(2, 0)
> +#define MA35_FUN_SEL_UART	FIELD_PREP(MA35_FUN_SEL_MASK, 0)
> +#define MA35_FUN_SEL_RS485	FIELD_PREP(MA35_FUN_SEL_MASK, 3)
> +
> +/* The constrain for MA35D1 UART baud rate divider */
> +#define MA35_BAUD_DIV_MAX	0xFFFF
> +#define MA35_BAUD_DIV_MIN	11
> +
> +/* UART FIFO depth */
> +#define MA35_UART_FIFO_DEPTH	32
> +/* UART console clock */
> +#define MA35_UART_CONSOLE_CLK	(24 * HZ_PER_MHZ)
> +/* UART register ioremap size */
> +#define MA35_UART_REG_SIZE	0x100
> +/* Rx Timeout */
> +#define MA35_UART_RX_TOUT	0x40
> +
> +#define MA35_ISR_IF_CHECK	(MA35_ISR_RDA_IF | MA35_ISR_RXTO_IF | \
> +				 MA35_ISR_THRE_INT | MA35_ISR_BUFEIF)
> +
> +static struct uart_driver ma35d1serial_reg;
> +
> +struct uart_ma35d1_port {
> +	struct uart_port port;
> +	struct clk *clk;
> +	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 uart_ma35d1_port ma35d1serial_ports[MA35_UART_NR];
> +
> +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, MA35_IER_REG);
> +	if (ier & MA35_IER_THRE_IEN)
> +		serial_out(p, MA35_IER_REG, ier & ~MA35_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)
> +{
> +	u32 count;
> +	u8 ch;
> +
> +	if (uart_tx_stopped(&up->port)) {
> +		ma35d1serial_stop_tx(&up->port);
> +		return;
> +	}
> +	count = MA35_UART_FIFO_DEPTH - FIELD_GET(MA35_FSR_TXPTR_MSK,
> +						 serial_in(up, MA35_FSR_REG));
> +	uart_port_tx_limited(&up->port, ch, count,
> +			     !(serial_in(up, MA35_FSR_REG) & MA35_FSR_TX_FULL),
> +			     serial_out(up, MA35_THR_REG, ch),
> +			     ({}));
> +}
> +
> +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, MA35_IER_REG);
> +	serial_out(up, MA35_IER_REG, ier & ~MA35_IER_THRE_IEN);
> +	transmit_chars(up);
> +	serial_out(up, MA35_IER_REG, ier | MA35_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, MA35_IER_REG, serial_in(up, MA35_IER_REG) & ~MA35_IER_RDA_IEN);
> +}
> +
> +static void receive_chars(struct uart_ma35d1_port *up)
> +{
> +	u8 ch, flag;
> +	u32 fsr;
> +	int max_count = 256;
> +
> +	fsr = serial_in(up, MA35_FSR_REG);
> +	do {
> +		flag = TTY_NORMAL;
> +		up->port.icount.rx++;
> +
> +		if (unlikely(fsr & (MA35_FSR_BIF | MA35_FSR_FEF |
> +				    MA35_FSR_PEF | MA35_FSR_RX_OVER_IF))) {
> +			if (fsr & MA35_FSR_BIF) {
> +				up->port.icount.brk++;
> +				if (uart_handle_break(&up->port))
> +					continue;
> +			}
> +			if (fsr & MA35_FSR_FEF)
> +				up->port.icount.frame++;
> +			if (fsr & MA35_FSR_PEF)
> +				up->port.icount.parity++;
> +			if (fsr & MA35_FSR_RX_OVER_IF)
> +				up->port.icount.overrun++;
> +
> +			serial_out(up, MA35_FSR_REG,
> +				   fsr & (MA35_FSR_BIF | MA35_FSR_FEF |
> +					  MA35_FSR_PEF | MA35_FSR_RX_OVER_IF));
> +			if (fsr & MA35_FSR_BIF)
> +				flag = TTY_BREAK;
> +			else if (fsr & MA35_FSR_PEF)
> +				flag = TTY_PARITY;
> +			else if (fsr & MA35_FSR_FEF)
> +				flag = TTY_FRAME;
> +		}
> +
> +		ch = serial_in(up, MA35_RBR_REG);
> +		if (uart_handle_sysrq_char(&up->port, ch))
> +			continue;
> +
> +		spin_lock(&up->port.lock);
> +		uart_insert_char(&up->port, fsr, MA35_FSR_RX_OVER_IF, ch, flag);
> +		spin_unlock(&up->port.lock);
> +
> +		fsr = serial_in(up, MA35_FSR_REG);
> +	} while (!(fsr & MA35_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, MA35_ISR_REG);
> +	fsr = serial_in(up, MA35_FSR_REG);
> +
> +	if (!(isr & MA35_ISR_IF_CHECK))
> +		return IRQ_NONE;
> +
> +	if (isr & (MA35_ISR_RDA_IF | MA35_ISR_RXTO_IF))
> +		receive_chars(up);
> +	if (isr & MA35_ISR_THRE_INT)
> +		transmit_chars(up);
> +	if (fsr & MA35_FSR_TX_OVER_IF)
> +		serial_out(up, MA35_FSR_REG, MA35_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, MA35_FSR_REG);
> +	return (fsr & (MA35_FSR_TE_FLAG | MA35_FSR_TX_EMPTY)) ==
> +		(MA35_FSR_TE_FLAG | MA35_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, MA35_MSR_REG);
> +	if (!(status & MA35_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;
> +	u32 ier;
> +
> +	mcr = serial_in(up, MA35_MCR_REG);
> +	mcr &= ~MA35_MCR_RTS_CTRL;
> +
> +	if (mctrl & TIOCM_RTS)
> +		mcr |= MA35_MCR_RTSACTLV;
> +	else
> +		mcr &= ~MA35_MCR_RTSACTLV;
> +
> +	if (up->mcr & UART_MCR_AFE) {
> +		serial_out(up, MA35_IER_REG, (serial_in(up, MA35_IER_REG) |
> +					     MA35_IER_AUTO_RTS |
> +					     MA35_IER_AUTO_CTS));
> +		up->port.flags |= UPF_HARD_FLOW;
> +	} else {
> +		ier = serial_in(up, MA35_IER_REG);
> +		ier &= ~(MA35_IER_AUTO_RTS | MA35_IER_AUTO_CTS);
> +		serial_out(up, MA35_IER_REG, ier);
> +		up->port.flags &= ~UPF_HARD_FLOW;
> +	}
> +	serial_out(up, MA35_MSR_REG, (serial_in(up, MA35_MSR_REG) |
> +				     MA35_MSR_CTSACTLV));
> +	serial_out(up, MA35_MCR_REG, 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, MA35_LCR_REG);
> +	if (break_state != 0)
> +		lcr |= MA35_LCR_BREAK;
> +	else
> +		lcr &= ~MA35_LCR_BREAK;
> +	serial_out(up, MA35_LCR_REG, 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, MA35_FCR_REG, MA35_FCR_TFR | MA35_FCR_RFR);
> +
> +	/* Clear pending interrupts */
> +	serial_out(up, MA35_ISR_REG, MA35_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, MA35_FCR_REG, serial_in(up, MA35_FCR_REG) |
> +		   MA35_FCR_RFITL_4BYTES | MA35_FCR_RTSTL_8BYTES);
> +	serial_out(up, MA35_LCR_REG, MA35_LCR_WLS_8BITS);
> +	serial_out(up, MA35_TOR_REG, MA35_UART_RX_TOUT);
> +	serial_out(up, MA35_IER_REG, MA35_IER_RTO_IEN | MA35_IER_RDA_IEN |
> +		   MA35_IER_TIME_OUT_EN | MA35_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, MA35_IER_REG, 0);
> +	free_irq(port->irq, port);
> +}
> +
> +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 |= MA35_LCR_NSB;
> +	if (termios->c_cflag & PARENB)
> +		lcr |= MA35_LCR_PBE;
> +	if (!(termios->c_cflag & PARODD))
> +		lcr |= MA35_LCR_EPE;
> +	if (termios->c_cflag & CMSPAR)
> +		lcr |= MA35_LCR_SPE;
> +
> +	baud = uart_get_baud_rate(port, termios, old,
> +				  port->uartclk / MA35_BAUD_DIV_MAX,
> +				  port->uartclk / MA35_BAUD_DIV_MIN);
> +
> +	/* MA35D1 UART baud rate equation: baudrate = UART_CLK / (quot + 2) */
> +	quot = (port->uartclk / baud) - 2;
> +
> +	/*
> +	 * 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 = MA35_FSR_RX_OVER_IF;
> +	if (termios->c_iflag & INPCK)
> +		up->port.read_status_mask |= MA35_FSR_FEF | MA35_FSR_PEF;
> +	if (termios->c_iflag & (BRKINT | PARMRK))
> +		up->port.read_status_mask |= MA35_FSR_BIF;
> +
> +	/* Characteres to ignore */
> +	up->port.ignore_status_mask = 0;
> +	if (termios->c_iflag & IGNPAR)
> +		up->port.ignore_status_mask |= MA35_FSR_FEF | MA35_FSR_PEF;
> +	if (termios->c_iflag & IGNBRK) {
> +		up->port.ignore_status_mask |= MA35_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 |= MA35_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, MA35_BAUD_REG, MA35_BAUD_MODE2 | FIELD_PREP(MA35_BAUD_MASK, quot));
> +
> +	serial_out(up, MA35_LCR_REG, lcr);
> +
> +	spin_unlock_irqrestore(&up->port.lock, flags);
> +}
> +
> +static const char *ma35d1serial_type(struct uart_port *port)
> +{
> +	return port->type == PORT_MA35 ? "ma35d1-uart" : NULL;
> +}
> +
> +static void ma35d1serial_config_port(struct uart_port *port, int flags)
> +{
> +	if (flags & UART_CONFIG_TYPE)
> +		port->type = PORT_MA35;
> +}
> +
> +static int ma35d1serial_verify_port(struct uart_port *port, struct serial_struct *ser)
> +{
> +	if (port->type != PORT_UNKNOWN && ser->type != PORT_MA35)
> +		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 struct device_node *ma35d1serial_uart_nodes[MA35_UART_NR];
> +
> +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, MA35_FSR_REG) & MA35_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, MA35_THR_REG, 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;
> +
> +	spin_lock_irqsave(&up->port.lock, flags);

This lacks the oops_in_progress trickery the other drivers do?

Although I think there really should be uart_console_write_lock(uart_port 
*up, unsigned long *flags, bool *locked) and uart_console_write_unlock() 
helpers in serial core for this task.

-- 
 i.


> +	/*
> +	 *  First save the IER then disable the interrupts
> +	 */
> +	ier = serial_in(up, MA35_IER_REG);
> +	serial_out(up, MA35_IER_REG, 0);
> +
> +	uart_console_write(&up->port, s, count, ma35d1serial_console_putchar);
> +
> +	wait_for_xmitr(up);
> +	serial_out(up, MA35_IER_REG, ier);
> +
> +	spin_unlock_irqrestore(&up->port.lock, flags);
> +}
> +
> +static int __init ma35d1serial_console_setup(struct console *co, char *options)
> +{
> +	struct device_node *np;
> +	struct uart_ma35d1_port *p;
> +	u32 val32[4];
> +	struct uart_port *port;
> +	int baud = 115200;
> +	int bits = 8;
> +	int parity = 'n';
> +	int flow = 'n';
> +
> +	if ((co->index < 0) || (co->index >= MA35_UART_NR)) {
> +		pr_debug("Console Port%x out of range\n", co->index);
> +		return -EINVAL;
> +	}
> +
> +	np = ma35d1serial_uart_nodes[co->index];
> +	p = &ma35d1serial_ports[co->index];
> +	if (!np || !p)
> +		return -ENODEV;
> +
> +	if (of_property_read_u32_array(np, "reg", val32, ARRAY_SIZE(val32)) != 0)
> +		return -EINVAL;
> +
> +	p->port.iobase = val32[1];
> +	p->port.membase = ioremap(p->port.iobase, MA35_UART_REG_SIZE);
> +	if (!p->port.membase)
> +		return -ENOMEM;
> +
> +	p->port.ops = &ma35d1serial_ops;
> +	p->port.line = 0;
> +	p->port.uartclk = MA35_UART_CONSOLE_CLK;
> +
> +	port = &ma35d1serial_ports[co->index].port;
> +
> +	if (options)
> +		uart_parse_options(options, &baud, &parity, &bits, &flow);
> +
> +	return uart_set_options(port, co, baud, parity, bits, flow);
> +}
> +
> +static struct console ma35d1serial_console = {
> +	.name    = "ttyNVT",
> +	.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)
> +{
> +	u32 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 == MA35_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     = "ttyNVT",
> +	.major        = TTY_MAJOR,
> +	.minor        = 64,
> +	.cons         = MA35D1SERIAL_CONSOLE,
> +	.nr           = MA35_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 = 0;
> +
> +	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, MA35_UART_REG_SIZE);
> +	up->port.ops = &ma35d1serial_ops;
> +
> +	spin_lock_init(&up->port.lock);
> +
> +	up->clk = of_clk_get(pdev->dev.of_node, 0);
> +	if (IS_ERR(up->clk)) {
> +		ret = PTR_ERR(up->clk);
> +		dev_err(&pdev->dev, "failed to get core clk: %d\n", ret);
> +		goto err_iounmap;
> +	}
> +
> +	ret = clk_prepare_enable(up->clk);
> +	if (ret)
> +		goto err_iounmap;
> +
> +	if (up->port.line != 0)
> +		up->port.uartclk = clk_get_rate(up->clk);
> +
> +	ret = platform_get_irq(pdev, 0);
> +	if (ret < 0)
> +		goto err_clk_disable;
> +
> +	up->port.irq = ret;
> +	up->port.dev = &pdev->dev;
> +	up->port.flags = UPF_BOOT_AUTOCONF;
> +
> +	platform_set_drvdata(pdev, up);
> +
> +	ret = uart_add_one_port(&ma35d1serial_reg, &up->port);
> +	if (ret < 0)
> +		goto err_free_irq;
> +
> +	return 0;
> +
> +err_free_irq:
> +	free_irq(up->port.irq, &up->port);
> +
> +err_clk_disable:
> +	clk_disable_unprepare(up->clk);
> +
> +err_iounmap:
> +	iounmap(up->port.membase);
> +	return ret;
> +}
> +
> +/*
> + * Remove serial ports registered against a platform device.
> + */
> +static int ma35d1serial_remove(struct platform_device *dev)
> +{
> +	struct uart_port *port = platform_get_drvdata(dev);
> +	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
> +
> +	uart_remove_one_port(&ma35d1serial_reg, port);
> +	clk_disable_unprepare(up->clk);
> +	return 0;
> +}
> +
> +static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
> +{
> +	struct uart_port *port = platform_get_drvdata(dev);
> +	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
> +
> +	uart_suspend_port(&ma35d1serial_reg, &up->port);
> +	if (up->port.line == 0) {
> +		up->console_baud_rate = serial_in(up, MA35_BAUD_REG);
> +		up->console_line = serial_in(up, MA35_LCR_REG);
> +		up->console_int = serial_in(up, MA35_IER_REG);
> +	}
> +	return 0;
> +}
> +
> +static int ma35d1serial_resume(struct platform_device *dev)
> +{
> +	struct uart_port *port = platform_get_drvdata(dev);
> +	struct uart_ma35d1_port *up = to_ma35d1_uart_port(port);
> +
> +	if (up->port.line == 0) {
> +		serial_out(up, MA35_BAUD_REG, up->console_baud_rate);
> +		serial_out(up, MA35_LCR_REG, up->console_line);
> +		serial_out(up, MA35_IER_REG, up->console_int);
> +	}
> +	uart_resume_port(&ma35d1serial_reg, &up->port);
> +	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");
> diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
> index 281fa286555c..c11600bb1b0d 100644
> --- a/include/uapi/linux/serial_core.h
> +++ b/include/uapi/linux/serial_core.h
> @@ -279,4 +279,7 @@
>  /* Sunplus UART */
>  #define PORT_SUNPLUS	123
>  
> +/* Nuvoton MA35 SoC */
> +#define PORT_MA35	124
> +
>  #endif /* _UAPILINUX_SERIAL_CORE_H */
> 

Re: [PATCH v12 10/10] tty: serial: Add Nuvoton ma35d1 serial driver support

[Jacky Huang]

Dear Ilpo,


On 2023/5/30 下午 04:33, Ilpo Järvinen wrote:
> On Tue, 30 May 2023, Jacky Huang wrote:
>
>> 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 | 801 +++++++++++++++++++++++++++++
>>   include/uapi/linux/serial_core.h   |   3 +
>>   4 files changed, 823 insertions(+)
>>   create mode 100644 drivers/tty/serial/ma35d1_serial.c
>>
>> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
>> index 398e5aac2e77..85ac6fc1ff1d 100644
>> --- a/drivers/tty/serial/Kconfig
>> +++ b/drivers/tty/serial/Kconfig
>> @@ -1555,6 +1555,24 @@ 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_MA35 || 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..0e823851c42c 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..c0a8c1e4ca0e
>> --- /dev/null
>> +++ b/drivers/tty/serial/ma35d1_serial.c
>> @@ -0,0 +1,801 @@
>> +// 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>
>> +#include <linux/units.h>
>> +
>> +#define MA35_UART_NR		17
>> +
>> +#define MA35_RBR_REG		0x00
>> +#define MA35_THR_REG		0x00
>> +#define MA35_IER_REG		0x04
>> +#define MA35_FCR_REG		0x08
>> +#define MA35_LCR_REG		0x0C
>> +#define MA35_MCR_REG		0x10
>> +#define MA35_MSR_REG		0x14
>> +#define MA35_FSR_REG		0x18
>> +#define MA35_ISR_REG		0x1C
>> +#define MA35_TOR_REG		0x20
>> +#define MA35_BAUD_REG		0x24
>> +#define MA35_ALTCTL_REG		0x2C
>> +#define MA35_FUN_SEL_REG	0x30
>> +#define MA35_WKCTL_REG		0x40
>> +#define MA35_WKSTS_REG		0x44
>> +
>> +/* MA35_IER_REG - Interrupt Enable Register */
>> +#define MA35_IER_RDA_IEN	BIT(0)  /* RBR Available Interrupt Enable */
>> +#define MA35_IER_THRE_IEN	BIT(1)  /* THR Empty Interrupt Enable */
>> +#define MA35_IER_RLS_IEN	BIT(2)  /* RX Line Status Interrupt Enable */
>> +#define MA35_IER_RTO_IEN	BIT(4)  /* RX Time-out Interrupt Enable */
>> +#define MA35_IER_BUFERR_IEN	BIT(5)  /* Buffer Error Interrupt Enable */
>> +#define MA35_IER_TIME_OUT_EN	BIT(11) /* RX Buffer Time-out Counter Enable */
>> +#define MA35_IER_AUTO_RTS	BIT(12) /* nRTS Auto-flow Control Enable */
>> +#define MA35_IER_AUTO_CTS	BIT(13) /* nCTS Auto-flow Control Enable */
>> +
>> +/* MA35_FCR_REG - FIFO Control Register */
>> +#define MA35_FCR_RFR		BIT(1)  /* RX Field Software Reset */
>> +#define MA35_FCR_TFR		BIT(2)  /* TX Field Software Reset */
>> +#define MA35_FCR_RFITL_MASK	GENMASK(7, 4) /* RX FIFO Interrupt Trigger Level */
>> +#define MA35_FCR_RFITL_1BYTE	FIELD_PREP(MA35_FCR_RFITL_MASK, 0)
>> +#define MA35_FCR_RFITL_4BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 1)
>> +#define MA35_FCR_RFITL_8BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 2)
>> +#define MA35_FCR_RFITL_14BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 3)
>> +#define MA35_FCR_RFITL_30BYTES	FIELD_PREP(MA35_FCR_RFITL_MASK, 4)
>> +#define MA35_FCR_RTSTL_MASK	GENMASK(19, 16) /* nRTS Trigger Level */
>> +#define MA35_FCR_RTSTL_1BYTE	FIELD_PREP(MA35_FCR_RTSTL_MASK, 0)
>> +#define MA35_FCR_RTSTL_4BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 1)
>> +#define MA35_FCR_RTSTL_8BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 2)
>> +#define MA35_FCR_RTSTL_14BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 3)
>> +#define MA35_FCR_RTSTLL_30BYTES	FIELD_PREP(MA35_FCR_RTSTL_MASK, 4)
>> +
>> +/* MA35_LCR_REG - Line Control Register */
>> +#define	MA35_LCR_NSB		BIT(2)  /* Number of “STOP Bit” */
>> +#define MA35_LCR_PBE		BIT(3)  /* Parity Bit Enable */
>> +#define MA35_LCR_EPE		BIT(4)  /* Even Parity Enable */
>> +#define MA35_LCR_SPE		BIT(5)  /* Stick Parity Enable */
>> +#define MA35_LCR_BREAK		BIT(6)  /* Break Control */
>> +#define MA35_LCR_WLS_MASK	GENMASK(1, 0) /* Word Length Selection */
>> +#define MA35_LCR_WLS_5BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 0)
>> +#define MA35_LCR_WLS_6BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 1)
>> +#define MA35_LCR_WLS_7BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 2)
>> +#define MA35_LCR_WLS_8BITS	FIELD_PREP(MA35_LCR_WLS_MASK, 3)
>> +
>> +/* MA35_MCR_REG - Modem Control Register */
>> +#define MA35_MCR_RTS_CTRL	BIT(1)  /* nRTS Signal Control */
>> +#define MA35_MCR_RTSACTLV	BIT(9)  /* nRTS Pin Active Level */
>> +#define MA35_MCR_RTSSTS		BIT(13) /* nRTS Pin Status (Read Only) */
>> +
>> +/* MA35_MSR_REG - Modem Status Register */
>> +#define MA35_MSR_CTSDETF	BIT(0)  /* Detect nCTS State Change Flag */
>> +#define MA35_MSR_CTSSTS		BIT(4)  /* nCTS Pin Status (Read Only) */
>> +#define MA35_MSR_CTSACTLV	BIT(8)  /* nCTS Pin Active Level */
>> +
>> +/* MA35_FSR_REG - FIFO Status Register */
>> +#define MA35_FSR_RX_OVER_IF	BIT(0)  /* RX Overflow Error Interrupt Flag */
>> +#define MA35_FSR_PEF		BIT(4)  /* Parity Error Flag*/
>> +#define MA35_FSR_FEF		BIT(5)  /* Framing Error Flag */
>> +#define MA35_FSR_BIF		BIT(6)  /* Break Interrupt Flag */
>> +#define MA35_FSR_RX_EMPTY	BIT(14) /* Receiver FIFO Empty (Read Only) */
>> +#define MA35_FSR_RX_FULL	BIT(15) /* Receiver FIFO Full (Read Only) */
>> +#define MA35_FSR_TX_EMPTY	BIT(22) /* Transmitter FIFO Empty (Read Only) */
>> +#define MA35_FSR_TX_FULL	BIT(23) /* Transmitter FIFO Full (Read Only) */
>> +#define MA35_FSR_TX_OVER_IF	BIT(24) /* TX Overflow Error Interrupt Flag */
>> +#define MA35_FSR_TE_FLAG	BIT(28) /* Transmitter Empty Flag (Read Only) */
>> +#define MA35_FSR_RXPTR_MSK	GENMASK(13, 8) /* TX FIFO Pointer mask */
>> +#define MA35_FSR_TXPTR_MSK	GENMASK(21, 16) /* RX FIFO Pointer mask */
>> +
>> +/* MA35_ISR_REG - Interrupt Status Register */
>> +#define MA35_ISR_RDA_IF		BIT(0)  /* RBR Available Interrupt Flag */
>> +#define MA35_ISR_THRE_IF	BIT(1)  /* THR Empty Interrupt Flag */
>> +#define MA35_ISR_RLSIF		BIT(2)  /* Receive Line Interrupt Flag */
>> +#define MA35_ISR_MODEMIF	BIT(3)  /* MODEM Interrupt Flag */
>> +#define MA35_ISR_RXTO_IF	BIT(4)  /* RX Time-out Interrupt Flag */
>> +#define MA35_ISR_BUFEIF		BIT(5)  /* Buffer Error Interrupt Flag */
>> +#define MA35_ISR_WK_IF		BIT(6)  /* UART Wake-up Interrupt Flag */
>> +#define MA35_ISR_RDAINT		BIT(8)  /* RBR Available Interrupt Indicator */
>> +#define MA35_ISR_THRE_INT	BIT(9)  /* THR Empty Interrupt Indicator */
>> +#define MA35_ISR_ALL		0xFFFFFFFF
>> +
>> +/* MA35_BAUD_REG - Baud Rate Divider Register */
>> +#define	MA35_BAUD_MODE_MASK	GENMASK(29, 28)
>> +#define MA35_BAUD_MODE0		FIELD_PREP(MA35_BAUD_MODE_MASK, 0)
>> +#define MA35_BAUD_MODE1		FIELD_PREP(MA35_BAUD_MODE_MASK, 2)
>> +#define MA35_BAUD_MODE2		FIELD_PREP(MA35_BAUD_MODE_MASK, 3)
>> +#define	MA35_BAUD_MASK		GENMASK(15, 0)
>> +
>> +/* MA35_ALTCTL_REG - Alternate Control/Status Register */
>> +#define MA35_ALTCTL_RS485AUD	BIT(10) /* RS-485 Auto Direction Function */
>> +
>> +/* MA35_FUN_SEL_REG - Function Select Register */
>> +#define MA35_FUN_SEL_MASK	GENMASK(2, 0)
>> +#define MA35_FUN_SEL_UART	FIELD_PREP(MA35_FUN_SEL_MASK, 0)
>> +#define MA35_FUN_SEL_RS485	FIELD_PREP(MA35_FUN_SEL_MASK, 3)
>> +
>> +/* The constrain for MA35D1 UART baud rate divider */
>> +#define MA35_BAUD_DIV_MAX	0xFFFF
>> +#define MA35_BAUD_DIV_MIN	11
>> +
>> +/* UART FIFO depth */
>> +#define MA35_UART_FIFO_DEPTH	32
>> +/* UART console clock */
>> +#define MA35_UART_CONSOLE_CLK	(24 * HZ_PER_MHZ)
>> +/* UART register ioremap size */
>> +#define MA35_UART_REG_SIZE	0x100
>> +/* Rx Timeout */
>> +#define MA35_UART_RX_TOUT	0x40
>> +
>> +#define MA35_ISR_IF_CHECK	(MA35_ISR_RDA_IF | MA35_ISR_RXTO_IF | \
>> +				 MA35_ISR_THRE_INT | MA35_ISR_BUFEIF)
>> +
>> +static struct uart_driver ma35d1serial_reg;
>> +
>> +struct uart_ma35d1_port {
>> +	struct uart_port port;
>> +	struct clk *clk;
>> +	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 uart_ma35d1_port ma35d1serial_ports[MA35_UART_NR];
>> +
>> +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, MA35_IER_REG);
>> +	if (ier & MA35_IER_THRE_IEN)
>> +		serial_out(p, MA35_IER_REG, ier & ~MA35_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)
>> +{
>> +	u32 count;
>> +	u8 ch;
>> +
>> +	if (uart_tx_stopped(&up->port)) {
>> +		ma35d1serial_stop_tx(&up->port);
>> +		return;
>> +	}
>> +	count = MA35_UART_FIFO_DEPTH - FIELD_GET(MA35_FSR_TXPTR_MSK,
>> +						 serial_in(up, MA35_FSR_REG));
>> +	uart_port_tx_limited(&up->port, ch, count,
>> +			     !(serial_in(up, MA35_FSR_REG) & MA35_FSR_TX_FULL),
>> +			     serial_out(up, MA35_THR_REG, ch),
>> +			     ({}));
>> +}
>> +
>> +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, MA35_IER_REG);
>> +	serial_out(up, MA35_IER_REG, ier & ~MA35_IER_THRE_IEN);
>> +	transmit_chars(up);
>> +	serial_out(up, MA35_IER_REG, ier | MA35_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, MA35_IER_REG, serial_in(up, MA35_IER_REG) & ~MA35_IER_RDA_IEN);
>> +}
>> +
>> +static void receive_chars(struct uart_ma35d1_port *up)
>> +{
>> +	u8 ch, flag;
>> +	u32 fsr;
>> +	int max_count = 256;
>> +
>> +	fsr = serial_in(up, MA35_FSR_REG);
>> +	do {
>> +		flag = TTY_NORMAL;
>> +		up->port.icount.rx++;
>> +
>> +		if (unlikely(fsr & (MA35_FSR_BIF | MA35_FSR_FEF |
>> +				    MA35_FSR_PEF | MA35_FSR_RX_OVER_IF))) {
>> +			if (fsr & MA35_FSR_BIF) {
>> +				up->port.icount.brk++;
>> +				if (uart_handle_break(&up->port))
>> +					continue;
>> +			}
>> +			if (fsr & MA35_FSR_FEF)
>> +				up->port.icount.frame++;
>> +			if (fsr & MA35_FSR_PEF)
>> +				up->port.icount.parity++;
>> +			if (fsr & MA35_FSR_RX_OVER_IF)
>> +				up->port.icount.overrun++;
>> +
>> +			serial_out(up, MA35_FSR_REG,
>> +				   fsr & (MA35_FSR_BIF | MA35_FSR_FEF |
>> +					  MA35_FSR_PEF | MA35_FSR_RX_OVER_IF));
>> +			if (fsr & MA35_FSR_BIF)
>> +				flag = TTY_BREAK;
>> +			else if (fsr & MA35_FSR_PEF)
>> +				flag = TTY_PARITY;
>> +			else if (fsr & MA35_FSR_FEF)
>> +				flag = TTY_FRAME;
>> +		}
>> +
>> +		ch = serial_in(up, MA35_RBR_REG);
>> +		if (uart_handle_sysrq_char(&up->port, ch))
>> +			continue;
>> +
>> +		spin_lock(&up->port.lock);
>> +		uart_insert_char(&up->port, fsr, MA35_FSR_RX_OVER_IF, ch, flag);
>> +		spin_unlock(&up->port.lock);
>> +
>> +		fsr = serial_in(up, MA35_FSR_REG);
>> +	} while (!(fsr & MA35_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, MA35_ISR_REG);
>> +	fsr = serial_in(up, MA35_FSR_REG);
>> +
>> +	if (!(isr & MA35_ISR_IF_CHECK))
>> +		return IRQ_NONE;
>> +
>> +	if (isr & (MA35_ISR_RDA_IF | MA35_ISR_RXTO_IF))
>> +		receive_chars(up);
>> +	if (isr & MA35_ISR_THRE_INT)
>> +		transmit_chars(up);
>> +	if (fsr & MA35_FSR_TX_OVER_IF)
>> +		serial_out(up, MA35_FSR_REG, MA35_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, MA35_FSR_REG);
>> +	return (fsr & (MA35_FSR_TE_FLAG | MA35_FSR_TX_EMPTY)) ==
>> +		(MA35_FSR_TE_FLAG | MA35_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, MA35_MSR_REG);
>> +	if (!(status & MA35_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;
>> +	u32 ier;
>> +
>> +	mcr = serial_in(up, MA35_MCR_REG);
>> +	mcr &= ~MA35_MCR_RTS_CTRL;
>> +
>> +	if (mctrl & TIOCM_RTS)
>> +		mcr |= MA35_MCR_RTSACTLV;
>> +	else
>> +		mcr &= ~MA35_MCR_RTSACTLV;
>> +
>> +	if (up->mcr & UART_MCR_AFE) {
>> +		serial_out(up, MA35_IER_REG, (serial_in(up, MA35_IER_REG) |
>> +					     MA35_IER_AUTO_RTS |
>> +					     MA35_IER_AUTO_CTS));
>> +		up->port.flags |= UPF_HARD_FLOW;
>> +	} else {
>> +		ier = serial_in(up, MA35_IER_REG);
>> +		ier &= ~(MA35_IER_AUTO_RTS | MA35_IER_AUTO_CTS);
>> +		serial_out(up, MA35_IER_REG, ier);
>> +		up->port.flags &= ~UPF_HARD_FLOW;
>> +	}
>> +	serial_out(up, MA35_MSR_REG, (serial_in(up, MA35_MSR_REG) |
>> +				     MA35_MSR_CTSACTLV));
>> +	serial_out(up, MA35_MCR_REG, 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, MA35_LCR_REG);
>> +	if (break_state != 0)
>> +		lcr |= MA35_LCR_BREAK;
>> +	else
>> +		lcr &= ~MA35_LCR_BREAK;
>> +	serial_out(up, MA35_LCR_REG, 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, MA35_FCR_REG, MA35_FCR_TFR | MA35_FCR_RFR);
>> +
>> +	/* Clear pending interrupts */
>> +	serial_out(up, MA35_ISR_REG, MA35_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, MA35_FCR_REG, serial_in(up, MA35_FCR_REG) |
>> +		   MA35_FCR_RFITL_4BYTES | MA35_FCR_RTSTL_8BYTES);
>> +	serial_out(up, MA35_LCR_REG, MA35_LCR_WLS_8BITS);
>> +	serial_out(up, MA35_TOR_REG, MA35_UART_RX_TOUT);
>> +	serial_out(up, MA35_IER_REG, MA35_IER_RTO_IEN | MA35_IER_RDA_IEN |
>> +		   MA35_IER_TIME_OUT_EN | MA35_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, MA35_IER_REG, 0);
>> +	free_irq(port->irq, port);
>> +}
>> +
>> +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 |= MA35_LCR_NSB;
>> +	if (termios->c_cflag & PARENB)
>> +		lcr |= MA35_LCR_PBE;
>> +	if (!(termios->c_cflag & PARODD))
>> +		lcr |= MA35_LCR_EPE;
>> +	if (termios->c_cflag & CMSPAR)
>> +		lcr |= MA35_LCR_SPE;
>> +
>> +	baud = uart_get_baud_rate(port, termios, old,
>> +				  port->uartclk / MA35_BAUD_DIV_MAX,
>> +				  port->uartclk / MA35_BAUD_DIV_MIN);
>> +
>> +	/* MA35D1 UART baud rate equation: baudrate = UART_CLK / (quot + 2) */
>> +	quot = (port->uartclk / baud) - 2;
>> +
>> +	/*
>> +	 * 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 = MA35_FSR_RX_OVER_IF;
>> +	if (termios->c_iflag & INPCK)
>> +		up->port.read_status_mask |= MA35_FSR_FEF | MA35_FSR_PEF;
>> +	if (termios->c_iflag & (BRKINT | PARMRK))
>> +		up->port.read_status_mask |= MA35_FSR_BIF;
>> +
>> +	/* Characteres to ignore */
>> +	up->port.ignore_status_mask = 0;
>> +	if (termios->c_iflag & IGNPAR)
>> +		up->port.ignore_status_mask |= MA35_FSR_FEF | MA35_FSR_PEF;
>> +	if (termios->c_iflag & IGNBRK) {
>> +		up->port.ignore_status_mask |= MA35_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 |= MA35_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, MA35_BAUD_REG, MA35_BAUD_MODE2 | FIELD_PREP(MA35_BAUD_MASK, quot));
>> +
>> +	serial_out(up, MA35_LCR_REG, lcr);
>> +
>> +	spin_unlock_irqrestore(&up->port.lock, flags);
>> +}
>> +
>> +static const char *ma35d1serial_type(struct uart_port *port)
>> +{
>> +	return port->type == PORT_MA35 ? "ma35d1-uart" : NULL;
>> +}
>> +
>> +static void ma35d1serial_config_port(struct uart_port *port, int flags)
>> +{
>> +	if (flags & UART_CONFIG_TYPE)
>> +		port->type = PORT_MA35;
>> +}
>> +
>> +static int ma35d1serial_verify_port(struct uart_port *port, struct serial_struct *ser)
>> +{
>> +	if (port->type != PORT_UNKNOWN && ser->type != PORT_MA35)
>> +		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 struct device_node *ma35d1serial_uart_nodes[MA35_UART_NR];
>> +
>> +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, MA35_FSR_REG) & MA35_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, MA35_THR_REG, 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;
>> +
>> +	spin_lock_irqsave(&up->port.lock, flags);
> This lacks the oops_in_progress trickery the other drivers do?
>
> Although I think there really should be uart_console_write_lock(uart_port
> *up, unsigned long *flags, bool *locked) and uart_console_write_unlock()
> helpers in serial core for this task.
>

Okay, I will add the 'oops_in_progress' check to it.


Best regards,
Jacky Huang