[PATCH v7 00/37] Device Tree support for SH7751 based board

[PATCH v7 00/37] Device Tree support for SH7751 based board

[Yoshinori Sato]

This is an updated version of something I wrote about 7 years ago.
Minimum support for R2D-plus and LANDISK.
I think R2D-1 will work if you add AX88796 to dts.
And board-specific functions and SCI's SPI functions are not supported.

You can get it working with qemu found here.
https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk

v7 changes.
- sh/kernel/setup.c: fix kernel parameter handling.
- clk-sh7750.c: cleanup.
- sh_tmu.c: cleanup.
- irq-renesas-sh7751.c: IPR definition move to code.
- irq-renesas-sh7751irl.c: update register definition.
- pci-sh7751.c: Register initialization fix. 
- sm501 and sm501fb: Re-design Device Tree properties.

v6 changes.
- pci-sh7751: merge register define.
- pci-sh7751: use 'dma-ranges' property.
- pci-sh7751: rename general PCI properties.
- sm501 and sm501fb: Re-design Device Tree properties.
- sh/kernel/setup: cleanup command line setup.
- irq-sh7751.c: some cleanup.

v5 changes.
- pci-sh7751: revert header changes. and some fix in previuous driver.
- sh/kernel/iomap.c: Use SH io functions.
- sm501 and sm501fb: re-write DT support.

v4 changes.
- cpg-sh7750: use clk-divider and clk-gate.
- pci-sh7751: unified header files to old PCI driver.
- irq-renesas-sh7751: IPR registers direct mapping.
- irq-renesas-sh7751irl: useful register bit mapping.
- sm501 and sm501fb: re-write dt parser.
- j2_minus: fix build error.
- dt-binding schema: fix some errors.
- *.dts: cleanup.

v3 changes.
- Rewrite clk drivers.
- Added sh_tmu to OF support.
- Cleanup PCI stuff.
- Update sm501 and sm501fb OF support.
- Update devicetree and documents.

v2 changes.
- Rebasing v6,6-rc1
- re-write irqchip driver.
- Add binding documents.
- Cleanup review comment.

Yoshinori Sato (37):
  sh: passing FDT address to kernel startup.
  sh: Kconfig unified OF supported targets.
  sh: Enable OF support for build and configuration.
  dt-bindings: interrupt-controller: Add header for Renesas SH3/4 INTC.
  sh: GENERIC_IRQ_CHIP support for CONFIG_OF=y
  sh: kernel/setup Update DT support.
  sh: Fix COMMON_CLK support in CONFIG_OF=y.
  clocksource: sh_tmu: CLOCKSOURCE support.
  dt-binding: Add compatible SH7750 SoC
  sh: Common PCI Framework driver support.
  pci: pci-sh7751: Add SH7751 PCI driver
  dt-bindings: pci: pci-sh7751: Add SH7751 PCI
  dt-bindings: clock: sh7750-cpg: Add renesas,sh7750-cpg header.
  clk: Compatible with narrow registers
  clk: renesas: Add SH7750/7751 CPG Driver
  irqchip: Add SH7751 INTC driver
  dt-bindings: interrupt-controller: renesas,sh7751-intc: Add
    json-schema
  irqchip: SH7751 external interrupt encoder with enable gate.
  dt-bindings: interrupt-controller: renesas,sh7751-irl-ext: Add
    json-schema
  serial: sh-sci: fix SH4 OF support.
  dt-bindings: serial: renesas,scif: Add scif-sh7751.
  dt-bindings: display: smi,sm501: SMI SM501 binding json-schema
  dt-bindings: display: sm501 register definition helper
  mfd: sm501: Convert platform_data to OF property
  dt-binding: sh: cpus: Add SH CPUs json-schema
  dt-bindings: vendor-prefixes: Add iodata
  dt-bindings: ata: ata-generic: Add new targets
  dt-bindings: soc: renesas: sh: Add SH7751 based target
  sh: SH7751R SoC Internal peripheral definition dtsi.
  sh: add RTS7751R2D Plus DTS
  sh: Add IO DATA LANDISK dts
  sh: Add IO DATA USL-5P dts
  sh: j2_mimas_v2.dts update
  sh: Add dtbs target support.
  sh: RTS7751R2D Plus OF defconfig
  sh: LANDISK OF defconfig
  sh: j2_defconfig: update

 .../devicetree/bindings/ata/ata-generic.yaml  |   2 +
 .../bindings/clock/renesas,sh7750-cpg.yaml    | 105 ++++
 .../bindings/display/smi,sm501.yaml           | 398 +++++++++++++++
 .../renesas,sh7751-intc.yaml                  |  53 ++
 .../renesas,sh7751-irl-ext.yaml               |  57 +++
 .../bindings/pci/renesas,sh7751-pci.yaml      |  89 ++++
 .../bindings/serial/renesas,scif.yaml         |   1 +
 .../devicetree/bindings/sh/cpus.yaml          |  63 +++
 .../devicetree/bindings/soc/renesas/sh.yaml   |  27 +
 .../bindings/timer/renesas,tmu.yaml           |   2 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/sh/Kconfig                               |  33 +-
 arch/sh/boards/Kconfig                        |  23 +-
 arch/sh/boards/of-generic.c                   |  28 +-
 arch/sh/boot/compressed/head_32.S             |   5 +-
 arch/sh/boot/dts/Makefile                     |   5 +
 arch/sh/boot/dts/j2_mimas_v2.dts              |   2 +-
 arch/sh/boot/dts/landisk.dts                  |  77 +++
 arch/sh/boot/dts/rts7751r2dplus.dts           | 169 ++++++
 arch/sh/boot/dts/sh7751r.dtsi                 | 105 ++++
 arch/sh/boot/dts/usl-5p.dts                   |  85 ++++
 arch/sh/configs/j2_defconfig                  |  11 +-
 arch/sh/configs/landisk-of_defconfig          | 104 ++++
 arch/sh/configs/rts7751r2dplus-of_defconfig   |  75 +++
 arch/sh/drivers/Makefile                      |   2 +
 arch/sh/include/asm/io.h                      |   8 +
 arch/sh/include/asm/irq.h                     |  10 +-
 arch/sh/include/asm/pci.h                     |   4 +
 arch/sh/include/asm/setup.h                   |   1 +
 arch/sh/kernel/cpu/Makefile                   |   6 +-
 arch/sh/kernel/cpu/irq/imask.c                |  17 +
 arch/sh/kernel/cpu/sh4/Makefile               |   3 +
 arch/sh/kernel/iomap.c                        |  18 +
 arch/sh/kernel/setup.c                        |  36 +-
 arch/sh/kernel/time.c                         |  12 +
 drivers/clk/clk-divider.c                     |  56 +-
 drivers/clk/clk-gate.c                        |  62 ++-
 drivers/clk/renesas/Kconfig                   |  13 +-
 drivers/clk/renesas/Makefile                  |   1 +
 drivers/clk/renesas/clk-sh7750.c              | 480 ++++++++++++++++++
 drivers/clocksource/sh_tmu.c                  | 198 +++++---
 drivers/irqchip/Kconfig                       |  15 +
 drivers/irqchip/Makefile                      |   3 +
 drivers/irqchip/irq-renesas-sh7751.c          | 282 ++++++++++
 drivers/irqchip/irq-renesas-sh7751irl.c       | 221 ++++++++
 drivers/mfd/sm501.c                           | 315 ++++++++++++
 drivers/pci/controller/Kconfig                |   9 +
 drivers/pci/controller/Makefile               |   1 +
 drivers/pci/controller/pci-sh7751.c           | 342 +++++++++++++
 drivers/tty/serial/Kconfig                    |   2 +-
 drivers/tty/serial/sh-sci.c                   |   6 +-
 drivers/video/fbdev/sm501fb.c                 | 106 ++++
 include/dt-bindings/clock/sh7750-cpg.h        |  26 +
 include/dt-bindings/display/sm501.h           |  76 +++
 .../renesas,sh7751-intc.h                     |  19 +
 include/linux/clk-provider.h                  |  22 +-
 include/linux/sh_intc.h                       |   7 +-
 57 files changed, 3713 insertions(+), 187 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/renesas,sh7750-cpg.yaml
 create mode 100644 Documentation/devicetree/bindings/display/smi,sm501.yaml
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.yaml
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-irl-ext.yaml
 create mode 100644 Documentation/devicetree/bindings/pci/renesas,sh7751-pci.yaml
 create mode 100644 Documentation/devicetree/bindings/sh/cpus.yaml
 create mode 100644 Documentation/devicetree/bindings/soc/renesas/sh.yaml
 create mode 100644 arch/sh/boot/dts/landisk.dts
 create mode 100644 arch/sh/boot/dts/rts7751r2dplus.dts
 create mode 100644 arch/sh/boot/dts/sh7751r.dtsi
 create mode 100644 arch/sh/boot/dts/usl-5p.dts
 create mode 100644 arch/sh/configs/landisk-of_defconfig
 create mode 100644 arch/sh/configs/rts7751r2dplus-of_defconfig
 create mode 100644 drivers/clk/renesas/clk-sh7750.c
 create mode 100644 drivers/irqchip/irq-renesas-sh7751.c
 create mode 100644 drivers/irqchip/irq-renesas-sh7751irl.c
 create mode 100644 drivers/pci/controller/pci-sh7751.c
 create mode 100644 include/dt-bindings/clock/sh7750-cpg.h
 create mode 100644 include/dt-bindings/display/sm501.h
 create mode 100644 include/dt-bindings/interrupt-controller/renesas,sh7751-intc.h

-- 
2.39.2

[PATCH v7 01/37] sh: passing FDT address to kernel startup.

[Yoshinori Sato]

R4 is caller saved in SH ABI.
Save it so it doesn't get corrupted until it's needed for initialization.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 arch/sh/boot/compressed/head_32.S | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S
index 7bb168133dbb..6be59851122e 100644
--- a/arch/sh/boot/compressed/head_32.S
+++ b/arch/sh/boot/compressed/head_32.S
@@ -15,7 +15,8 @@ startup:
 	/* Load initial status register */
 	mov.l   init_sr, r1
 	ldc     r1, sr
-
+	/* Save FDT address */
+	mov	r4, r13
 	/* Move myself to proper location if necessary */
 	mova	1f, r0
 	mov.l	1f, r2
@@ -84,7 +85,7 @@ l1:
 	/* Jump to the start of the decompressed kernel */
 	mov.l	kernel_start_addr, r0
 	jmp	@r0
-	nop
+	 mov	r13, r4
 	
 	.align	2
 bss_start_addr:
-- 
2.39.2

[PATCH v7 02/37] sh: Kconfig unified OF supported targets.

[Yoshinori Sato]

Targets that support OF should be treated as one board.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/Kconfig        |  1 +
 arch/sh/boards/Kconfig | 23 +++++++++++++----------
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 2ad3e29f0ebe..cbf48e69ad74 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -711,6 +711,7 @@ choice
 	prompt "Kernel command line"
 	optional
 	default CMDLINE_OVERWRITE
+	depends on !OF || USE_BUILTIN_DTB
 	help
 	  Setting this option allows the kernel command line arguments
 	  to be set.
diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig
index 109bec4dad94..46387fd040ad 100644
--- a/arch/sh/boards/Kconfig
+++ b/arch/sh/boards/Kconfig
@@ -19,16 +19,9 @@ config SH_DEVICE_TREE
 	select TIMER_OF
 	select COMMON_CLK
 	select GENERIC_CALIBRATE_DELAY
-
-config SH_JCORE_SOC
-	bool "J-Core SoC"
-	select SH_DEVICE_TREE
-	select CLKSRC_JCORE_PIT
-	select JCORE_AIC
-	depends on CPU_J2
-	help
-	  Select this option to include drivers core components of the
-	  J-Core SoC, including interrupt controllers and timers.
+	select GENERIC_IRQ_CHIP
+	select SYS_SUPPORTS_PCI
+	select GENERIC_PCI_IOMAP if PCI
 
 config SH_SOLUTION_ENGINE
 	bool "SolutionEngine"
@@ -293,6 +286,7 @@ config SH_LANDISK
 	bool "LANDISK"
 	depends on CPU_SUBTYPE_SH7751R
 	select HAVE_PCI
+	select SYS_SUPPORTS_PCI
 	help
 	  I-O DATA DEVICE, INC. "LANDISK Series" support.
 
@@ -369,6 +363,15 @@ config SH_APSH4AD0A
 	help
 	  Select AP-SH4AD-0A if configuring for an ALPHAPROJECT AP-SH4AD-0A.
 
+config SH_OF_BOARD
+	bool "General Open Firmware boards"
+	select SH_DEVICE_TREE
+	select CLKSRC_JCORE_PIT if CPU_J2
+	select JCORE_AIC if CPU_J2
+	select HAVE_PCI if CPU_SUBTYPE_SH7751R
+	help
+	  This board means general OF supported targets.
+
 source "arch/sh/boards/mach-r2d/Kconfig"
 source "arch/sh/boards/mach-highlander/Kconfig"
 source "arch/sh/boards/mach-sdk7780/Kconfig"
-- 
2.39.2

[PATCH v7 03/37] sh: Enable OF support for build and configuration.

[Yoshinori Sato]

IRQ, CLK and PCI will be migrated to a common driver framework.
So if OF, disable the SH specific drivers.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/Kconfig                 | 11 ++++++-----
 arch/sh/drivers/Makefile        |  2 ++
 arch/sh/kernel/cpu/Makefile     |  9 +++++++--
 arch/sh/kernel/cpu/sh4/Makefile |  3 +++
 4 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index cbf48e69ad74..6711cde0d973 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -66,10 +66,10 @@ config SUPERH
 	select MODULES_USE_ELF_RELA
 	select NEED_SG_DMA_LENGTH
 	select NO_DMA if !MMU && !DMA_COHERENT
-	select NO_GENERIC_PCI_IOPORT_MAP if PCI
+	select NO_GENERIC_PCI_IOPORT_MAP if !SH_DEVICE_TREE
 	select OLD_SIGACTION
 	select OLD_SIGSUSPEND
-	select PCI_DOMAINS if PCI
+	select PCI_DOMAINS if PCI && !SH_DEVICE_TREE
 	select PERF_EVENTS
 	select PERF_USE_VMALLOC
 	select RTC_LIB
@@ -153,7 +153,7 @@ menu "System type"
 #
 config CPU_SH2
 	bool
-	select SH_INTC
+	select SH_INTC if !SH_DEVICE_TREE
 
 config CPU_SH2A
 	bool
@@ -179,7 +179,7 @@ config CPU_SH4
 	select CPU_HAS_INTEVT
 	select CPU_HAS_SR_RB
 	select CPU_HAS_FPU if !CPU_SH4AL_DSP
-	select SH_INTC
+	select SH_INTC if !SH_DEVICE_TREE
 	select SYS_SUPPORTS_SH_TMU
 
 config CPU_SH4A
@@ -522,6 +522,7 @@ config SH_PCLK_FREQ
 
 config SH_CLK_CPG
 	def_bool y
+	depends on !COMMON_CLK
 
 config SH_CLK_CPG_LEGACY
 	depends on SH_CLK_CPG
@@ -666,7 +667,7 @@ config BUILTIN_DTB_SOURCE
 	  kernel.
 
 config ZERO_PAGE_OFFSET
-	hex
+	hex "Zero page offset"
 	default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 				SH_7751_SOLUTION_ENGINE
 	default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
diff --git a/arch/sh/drivers/Makefile b/arch/sh/drivers/Makefile
index 8bd10b904bf9..83f609ca1eb4 100644
--- a/arch/sh/drivers/Makefile
+++ b/arch/sh/drivers/Makefile
@@ -5,6 +5,8 @@
 
 obj-y		+= dma/ platform_early.o
 
+ifndef CONFIG_SH_DEVICE_TREE
 obj-$(CONFIG_PCI)		+= pci/
+endif
 obj-$(CONFIG_PUSH_SWITCH)	+= push-switch.o
 obj-$(CONFIG_HEARTBEAT)		+= heartbeat.o
diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile
index 46118236bf04..e00ebf134985 100644
--- a/arch/sh/kernel/cpu/Makefile
+++ b/arch/sh/kernel/cpu/Makefile
@@ -16,6 +16,11 @@ obj-$(CONFIG_ARCH_SHMOBILE)	+= shmobile/
 # Common interfaces.
 
 obj-$(CONFIG_SH_ADC)		+= adc.o
+ifndef CONFIG_COMMON_CLK
+obj-y += clock.o
 obj-$(CONFIG_SH_CLK_CPG_LEGACY)	+= clock-cpg.o
-
-obj-y	+= irq/ init.o clock.o fpu.o pfc.o proc.o
+endif
+ifndef CONFIG_GENERIC_IRQ_CHIP
+obj-y	+= irq/
+endif
+obj-y	+= init.o fpu.o pfc.o proc.o
diff --git a/arch/sh/kernel/cpu/sh4/Makefile b/arch/sh/kernel/cpu/sh4/Makefile
index 02e3ee16e15c..33da4c86feff 100644
--- a/arch/sh/kernel/cpu/sh4/Makefile
+++ b/arch/sh/kernel/cpu/sh4/Makefile
@@ -15,6 +15,7 @@ perf-$(CONFIG_CPU_SUBTYPE_SH7750)	:= perf_event.o
 perf-$(CONFIG_CPU_SUBTYPE_SH7750S)	:= perf_event.o
 perf-$(CONFIG_CPU_SUBTYPE_SH7091)	:= perf_event.o
 
+ifndef CONFIG_SH_DEVICE_TREE
 # CPU subtype setup
 obj-$(CONFIG_CPU_SUBTYPE_SH7750)	+= setup-sh7750.o
 obj-$(CONFIG_CPU_SUBTYPE_SH7750R)	+= setup-sh7750.o
@@ -29,5 +30,7 @@ ifndef CONFIG_CPU_SH4A
 clock-$(CONFIG_CPU_SH4)			:= clock-sh4.o
 endif
 
+endif # CONFIG_SH_DEVICE_TREE
+
 obj-y					+= $(clock-y)
 obj-$(CONFIG_PERF_EVENTS)		+= $(perf-y)
-- 
2.39.2

[PATCH v7 04/37] dt-bindings: interrupt-controller: Add header for Renesas SH3/4 INTC.

[Yoshinori Sato]

Renesas SH7751 Interrupt controller priority register define.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 .../renesas,sh7751-intc.h                     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 include/dt-bindings/interrupt-controller/renesas,sh7751-intc.h

diff --git a/include/dt-bindings/interrupt-controller/renesas,sh7751-intc.h b/include/dt-bindings/interrupt-controller/renesas,sh7751-intc.h
new file mode 100644
index 000000000000..0543bd1b895e
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/renesas,sh7751-intc.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+ *
+ * SH3/4 INTC IPR register offsets (Address / bits)
+ */
+
+#ifndef __DT_BINDINGS_RENESAS_SH7751_INTC
+#define __DT_BINDINGS_RENESAS_SH7751_INTC
+
+#define IPRA			0
+#define IPRB			4
+#define IPRC			8
+#define IPRD			12
+#define INTPRI00		256
+#define IPR_B12			12
+#define IPR_B8			8
+#define IPR_B4			4
+#define IPR_B0			0
+
+#endif
-- 
2.39.2

[PATCH v7 05/37] sh: GENERIC_IRQ_CHIP support for CONFIG_OF=y

[Yoshinori Sato]

Remove unused function prototype.
Add helper update_sr_imask. use for SH7751 irq driver.
Add stub intc_finalize.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/include/asm/io.h       |  2 ++
 arch/sh/include/asm/irq.h      | 10 ++++++++--
 arch/sh/kernel/cpu/Makefile    |  5 +----
 arch/sh/kernel/cpu/irq/imask.c | 17 +++++++++++++++++
 include/linux/sh_intc.h        |  7 ++++++-
 5 files changed, 34 insertions(+), 7 deletions(-)

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index cf5eab840d57..5c544cf5201b 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -121,7 +121,9 @@ __BUILD_MEMORY_STRING(__raw_, q, u64)
 
 #define ioport_map ioport_map
 #define ioport_unmap ioport_unmap
+#ifndef CONFIG_SH_DEVICE_TREE
 #define pci_iounmap pci_iounmap
+#endif
 
 #define ioread8 ioread8
 #define ioread16 ioread16
diff --git a/arch/sh/include/asm/irq.h b/arch/sh/include/asm/irq.h
index 0f384b1f45ca..3d897229dcc4 100644
--- a/arch/sh/include/asm/irq.h
+++ b/arch/sh/include/asm/irq.h
@@ -16,8 +16,8 @@
 /*
  * Simple Mask Register Support
  */
-extern void make_maskreg_irq(unsigned int irq);
-extern unsigned short *irq_mask_register;
+
+void update_sr_imask(unsigned int irq, bool enable);
 
 /*
  * PINT IRQs
@@ -54,4 +54,10 @@ extern void irq_finish(unsigned int irq);
 
 #include <asm-generic/irq.h>
 
+/* SH3/4 INTC stuff */
+/* IRL level 0 - 15 */
+#define NR_IRL 15
+/* IRL0 -> IRQ16 */
+#define IRL_BASE_IRQ	16
+
 #endif /* __ASM_SH_IRQ_H */
diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile
index e00ebf134985..ad12807fae9c 100644
--- a/arch/sh/kernel/cpu/Makefile
+++ b/arch/sh/kernel/cpu/Makefile
@@ -20,7 +20,4 @@ ifndef CONFIG_COMMON_CLK
 obj-y += clock.o
 obj-$(CONFIG_SH_CLK_CPG_LEGACY)	+= clock-cpg.o
 endif
-ifndef CONFIG_GENERIC_IRQ_CHIP
-obj-y	+= irq/
-endif
-obj-y	+= init.o fpu.o pfc.o proc.o
+obj-y	+= init.o fpu.o pfc.o proc.o irq/
diff --git a/arch/sh/kernel/cpu/irq/imask.c b/arch/sh/kernel/cpu/irq/imask.c
index 572585c3f2fd..7589ca7c506c 100644
--- a/arch/sh/kernel/cpu/irq/imask.c
+++ b/arch/sh/kernel/cpu/irq/imask.c
@@ -51,6 +51,7 @@ static inline void set_interrupt_registers(int ip)
 		     : "t");
 }
 
+#ifndef CONFIG_GENERIC_IRQ_CHIP
 static void mask_imask_irq(struct irq_data *data)
 {
 	unsigned int irq = data->irq;
@@ -83,3 +84,19 @@ void make_imask_irq(unsigned int irq)
 	irq_set_chip_and_handler_name(irq, &imask_irq_chip, handle_level_irq,
 				      "level");
 }
+#else
+void update_sr_imask(unsigned int irq, bool enable)
+{
+	if (enable) {
+		set_bit(irq, imask_mask);
+		interrupt_priority = IMASK_PRIORITY -
+		  find_first_bit(imask_mask, IMASK_PRIORITY);
+	} else {
+		clear_bit(irq, imask_mask);
+		if (interrupt_priority < IMASK_PRIORITY - irq)
+			interrupt_priority = IMASK_PRIORITY - irq;
+	}
+	set_interrupt_registers(interrupt_priority);
+}
+EXPORT_SYMBOL(update_sr_imask);
+#endif
diff --git a/include/linux/sh_intc.h b/include/linux/sh_intc.h
index 27ae79191bdc..994b5b05a0d7 100644
--- a/include/linux/sh_intc.h
+++ b/include/linux/sh_intc.h
@@ -139,8 +139,13 @@ struct intc_desc symbol __initdata = {					\
 int register_intc_controller(struct intc_desc *desc);
 int intc_set_priority(unsigned int irq, unsigned int prio);
 int intc_irq_lookup(const char *chipname, intc_enum enum_id);
+#ifndef CONFIG_SH_DEVICE_TREE
 void intc_finalize(void);
-
+#else
+static inline void intc_finalize(void)
+{
+}
+#endif
 #ifdef CONFIG_INTC_USERIMASK
 int register_intc_userimask(unsigned long addr);
 #else
-- 
2.39.2

[PATCH v7 06/37] sh: kernel/setup Update DT support.

[Yoshinori Sato]

Fix extrnal fdt initialize and bootargs.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/Kconfig             | 23 +++++++++++------------
 arch/sh/include/asm/setup.h |  1 +
 arch/sh/kernel/setup.c      | 36 +++++++++++++++++++++++-------------
 3 files changed, 35 insertions(+), 25 deletions(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 6711cde0d973..242cf30e704d 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -708,17 +708,22 @@ config ROMIMAGE_MMCIF
 	  first part of the romImage which in turn loads the rest the kernel
 	  image to RAM using the MMCIF hardware block.
 
+config CMDLINE
+	string "Kernel command line arguments string"
+	default "console=ttySC1,115200"
+
 choice
 	prompt "Kernel command line"
-	optional
-	default CMDLINE_OVERWRITE
-	depends on !OF || USE_BUILTIN_DTB
+	default CMDLINE_BOOTLOADER
+
+config CMDLINE_BOOTLOADER
+	bool "Use bootloader kernel arguments"
 	help
-	  Setting this option allows the kernel command line arguments
-	  to be set.
+	  Uses the command-line options passed by the boot loader.
+	  If boot loader dosen't provide kernel argments, Use built-in argments.
 
 config CMDLINE_OVERWRITE
-	bool "Overwrite bootloader kernel arguments"
+	bool "Overwrite built-in kernel arguments"
 	help
 	  Given string will overwrite any arguments passed in by
 	  a bootloader.
@@ -730,12 +735,6 @@ config CMDLINE_EXTEND
 	  by a bootloader.
 
 endchoice
-
-config CMDLINE
-	string "Kernel command line arguments string"
-	depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
-	default "console=ttySC1,115200"
-
 endmenu
 
 menu "Bus options"
diff --git a/arch/sh/include/asm/setup.h b/arch/sh/include/asm/setup.h
index fc807011187f..84bb23a771f3 100644
--- a/arch/sh/include/asm/setup.h
+++ b/arch/sh/include/asm/setup.h
@@ -21,5 +21,6 @@
 void sh_mv_setup(void);
 void check_for_initrd(void);
 void per_cpu_trap_init(void);
+void sh_fdt_init(phys_addr_t dt_phys);
 
 #endif /* _SH_SETUP_H */
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 620e5cf8ae1e..42e6292a40cf 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -30,6 +30,7 @@
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
+#include <linux/libfdt.h>
 #include <linux/uaccess.h>
 #include <uapi/linux/mount.h>
 #include <asm/io.h>
@@ -269,8 +270,22 @@ void __ref sh_fdt_init(phys_addr_t dt_phys)
 
 void __init setup_arch(char **cmdline_p)
 {
+#if defined(CONFIG_OF) && defined(CONFIG_OF_EARLY_FLATTREE)
+	if (IS_ENABLED(CONFIG_USE_BUILTIN_DTB)) {
+		/* Relocate Embedded DTB */
+		unflatten_and_copy_device_tree();
+	} else if (initial_boot_params) {
+		/* Reserve external DTB area */
+		memblock_reserve(__pa(initial_boot_params),
+				 fdt_totalsize(initial_boot_params));
+		unflatten_device_tree();
+	}
+	/* copy from /chosen/bootargs */
+	strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+#endif
 	enable_mmu();
 
+#ifndef CONFIG_OF
 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 
 	printk(KERN_NOTICE "Boot params:\n"
@@ -299,14 +314,17 @@ void __init setup_arch(char **cmdline_p)
 	bss_resource.start = virt_to_phys(__bss_start);
 	bss_resource.end = virt_to_phys(__bss_stop)-1;
 
-#ifdef CONFIG_CMDLINE_OVERWRITE
-	strscpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
-#else
-	strscpy(command_line, COMMAND_LINE, sizeof(command_line));
+#endif
+#if !defined(CONFIG_OF) || defined(CONFIG_USE_BUILTIN_DTB)
+	if (*COMMAND_LINE)
+		strscpy(command_line, COMMAND_LINE, sizeof(command_line));
+#endif
+	if (*command_line == '\0' || IS_ENABLED(CONFIG_CMDLINE_OVERWRITE))
+		/* Use built-in parameter */
+		strscpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
 #ifdef CONFIG_CMDLINE_EXTEND
 	strlcat(command_line, " ", sizeof(command_line));
 	strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
-#endif
 #endif
 
 	/* Save unparsed command line copy for /proc/cmdline */
@@ -322,14 +340,6 @@ void __init setup_arch(char **cmdline_p)
 	/* Let earlyprintk output early console messages */
 	sh_early_platform_driver_probe("earlyprintk", 1, 1);
 
-#ifdef CONFIG_OF_EARLY_FLATTREE
-#ifdef CONFIG_USE_BUILTIN_DTB
-	unflatten_and_copy_device_tree();
-#else
-	unflatten_device_tree();
-#endif
-#endif
-
 	paging_init();
 
 	/* Perform the machine specific initialisation */
-- 
2.39.2

[PATCH v7 07/37] sh: Fix COMMON_CLK support in CONFIG_OF=y.

[Yoshinori Sato]

Initialize the clock and timer using the COMMON_CLK procedure.
sh's earlytimer mechanism doesn't work properly in OF,
so timer initialization is delayed.
If CONFIG_OF=y, perform the general timer initialization procedure.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/boards/of-generic.c | 28 ++++------------------------
 arch/sh/kernel/time.c       | 12 ++++++++++++
 2 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c
index f7f3e618e85b..f1ca5a914c11 100644
--- a/arch/sh/boards/of-generic.c
+++ b/arch/sh/boards/of-generic.c
@@ -8,6 +8,7 @@
 #include <linux/of.h>
 #include <linux/of_clk.h>
 #include <linux/of_fdt.h>
+#include <linux/of_platform.h>
 #include <linux/clocksource.h>
 #include <linux/irqchip.h>
 #include <asm/machvec.h>
@@ -98,16 +99,7 @@ static void sh_of_smp_probe(void)
 
 #endif
 
-static void noop(void)
-{
-}
-
-static int noopi(void)
-{
-	return 0;
-}
-
-static void __init sh_of_mem_reserve(void)
+static void __init sh_of_mem_init(void)
 {
 	early_init_fdt_reserve_self();
 	early_init_fdt_scan_reserved_mem();
@@ -140,25 +132,13 @@ static void __init sh_of_init_irq(void)
 	irqchip_init();
 }
 
-static int __init sh_of_clk_init(void)
-{
-#ifdef CONFIG_COMMON_CLK
-	/* Disabled pending move to COMMON_CLK framework. */
-	pr_info("SH generic board support: scanning for clk providers\n");
-	of_clk_init(NULL);
-#endif
-	return 0;
-}
-
 static struct sh_machine_vector __initmv sh_of_generic_mv = {
 	.mv_setup	= sh_of_setup,
 	.mv_name	= "devicetree", /* replaced by DT root's model */
 	.mv_irq_demux	= sh_of_irq_demux,
 	.mv_init_irq	= sh_of_init_irq,
-	.mv_clk_init	= sh_of_clk_init,
-	.mv_mode_pins	= noopi,
-	.mv_mem_init	= noop,
-	.mv_mem_reserve	= sh_of_mem_reserve,
+	.mv_mode_pins	= generic_mode_pins,
+	.mv_mem_init	= sh_of_mem_init,
 };
 
 struct sh_clk_ops;
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index 821a09cbd605..ce5b7c2f8628 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -19,7 +19,9 @@
 #include <asm/clock.h>
 #include <asm/rtc.h>
 #include <asm/platform_early.h>
+#include <linux/of_clk.h>
 
+#ifndef CONFIG_SH_DEVICE_TREE
 static void __init sh_late_time_init(void)
 {
 	/*
@@ -43,3 +45,13 @@ void __init time_init(void)
 
 	late_time_init = sh_late_time_init;
 }
+#else
+/* CONFIG_SH_DEVICE_TREE */
+void __init time_init(void)
+{
+	pr_info("SH generic board support: scanning for clk providers\n");
+
+	of_clk_init(NULL);
+	timer_probe();
+}
+#endif
-- 
2.39.2

[PATCH v7 08/37] clocksource: sh_tmu: CLOCKSOURCE support.

[Yoshinori Sato]

Allows initialization as CLOCKSOURCE.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 drivers/clocksource/sh_tmu.c | 198 ++++++++++++++++++++++++-----------
 1 file changed, 134 insertions(+), 64 deletions(-)

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index beffff81c00f..59f9da7fd987 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -17,6 +17,8 @@
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
@@ -51,6 +53,7 @@ struct sh_tmu_channel {
 
 struct sh_tmu_device {
 	struct platform_device *pdev;
+	struct device_node *np;
 
 	void __iomem *mapbase;
 	struct clk *clk;
@@ -65,6 +68,7 @@ struct sh_tmu_device {
 
 	bool has_clockevent;
 	bool has_clocksource;
+	const char *name;
 };
 
 #define TSTR -1 /* shared register */
@@ -148,8 +152,8 @@ static int __sh_tmu_enable(struct sh_tmu_channel *ch)
 	/* enable clock */
 	ret = clk_enable(ch->tmu->clk);
 	if (ret) {
-		dev_err(&ch->tmu->pdev->dev, "ch%u: cannot enable clock\n",
-			ch->index);
+		pr_err("%s ch%u: cannot enable clock\n",
+		       ch->tmu->name, ch->index);
 		return ret;
 	}
 
@@ -174,9 +178,10 @@ static int sh_tmu_enable(struct sh_tmu_channel *ch)
 	if (ch->enable_count++ > 0)
 		return 0;
 
-	pm_runtime_get_sync(&ch->tmu->pdev->dev);
-	dev_pm_syscore_device(&ch->tmu->pdev->dev, true);
-
+	if (ch->tmu->pdev) {
+		pm_runtime_get_sync(&ch->tmu->pdev->dev);
+		dev_pm_syscore_device(&ch->tmu->pdev->dev, true);
+	}
 	return __sh_tmu_enable(ch);
 }
 
@@ -202,8 +207,10 @@ static void sh_tmu_disable(struct sh_tmu_channel *ch)
 
 	__sh_tmu_disable(ch);
 
-	dev_pm_syscore_device(&ch->tmu->pdev->dev, false);
-	pm_runtime_put(&ch->tmu->pdev->dev);
+	if (ch->tmu->pdev) {
+		dev_pm_syscore_device(&ch->tmu->pdev->dev, false);
+		pm_runtime_put(&ch->tmu->pdev->dev);
+	}
 }
 
 static void sh_tmu_set_next(struct sh_tmu_channel *ch, unsigned long delta,
@@ -245,7 +252,7 @@ static irqreturn_t sh_tmu_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static struct sh_tmu_channel *cs_to_sh_tmu(struct clocksource *cs)
+static inline struct sh_tmu_channel *cs_to_sh_tmu(struct clocksource *cs)
 {
 	return container_of(cs, struct sh_tmu_channel, cs);
 }
@@ -292,7 +299,8 @@ static void sh_tmu_clocksource_suspend(struct clocksource *cs)
 
 	if (--ch->enable_count == 0) {
 		__sh_tmu_disable(ch);
-		dev_pm_genpd_suspend(&ch->tmu->pdev->dev);
+		if (ch->tmu->pdev)
+			dev_pm_genpd_suspend(&ch->tmu->pdev->dev);
 	}
 }
 
@@ -304,7 +312,8 @@ static void sh_tmu_clocksource_resume(struct clocksource *cs)
 		return;
 
 	if (ch->enable_count++ == 0) {
-		dev_pm_genpd_resume(&ch->tmu->pdev->dev);
+		if (ch->tmu->pdev)
+			dev_pm_genpd_resume(&ch->tmu->pdev->dev);
 		__sh_tmu_enable(ch);
 	}
 }
@@ -324,14 +333,14 @@ static int sh_tmu_register_clocksource(struct sh_tmu_channel *ch,
 	cs->mask = CLOCKSOURCE_MASK(32);
 	cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
 
-	dev_info(&ch->tmu->pdev->dev, "ch%u: used as clock source\n",
-		 ch->index);
+	pr_info("%s ch%u: used as clock source\n",
+		ch->tmu->name, ch->index);
 
 	clocksource_register_hz(cs, ch->tmu->rate);
 	return 0;
 }
 
-static struct sh_tmu_channel *ced_to_sh_tmu(struct clock_event_device *ced)
+static inline struct sh_tmu_channel *ced_to_sh_tmu(struct clock_event_device *ced)
 {
 	return container_of(ced, struct sh_tmu_channel, ced);
 }
@@ -364,8 +373,8 @@ static int sh_tmu_clock_event_set_state(struct clock_event_device *ced,
 	if (clockevent_state_oneshot(ced) || clockevent_state_periodic(ced))
 		sh_tmu_disable(ch);
 
-	dev_info(&ch->tmu->pdev->dev, "ch%u: used for %s clock events\n",
-		 ch->index, periodic ? "periodic" : "oneshot");
+	pr_info("%s ch%u: used for %s clock events\n",
+		ch->tmu->name, ch->index, periodic ? "periodic" : "oneshot");
 	sh_tmu_clock_event_start(ch, periodic);
 	return 0;
 }
@@ -417,20 +426,22 @@ static void sh_tmu_register_clockevent(struct sh_tmu_channel *ch,
 	ced->set_state_shutdown = sh_tmu_clock_event_shutdown;
 	ced->set_state_periodic = sh_tmu_clock_event_set_periodic;
 	ced->set_state_oneshot = sh_tmu_clock_event_set_oneshot;
-	ced->suspend = sh_tmu_clock_event_suspend;
-	ced->resume = sh_tmu_clock_event_resume;
+	if (ch->tmu->pdev) {
+		ced->suspend = sh_tmu_clock_event_suspend;
+		ced->resume = sh_tmu_clock_event_resume;
+	}
 
-	dev_info(&ch->tmu->pdev->dev, "ch%u: used for clock events\n",
-		 ch->index);
+	pr_info("%s ch%u: used for clock events\n",
+		ch->tmu->name, ch->index);
 
 	clockevents_config_and_register(ced, ch->tmu->rate, 0x300, 0xffffffff);
 
 	ret = request_irq(ch->irq, sh_tmu_interrupt,
 			  IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,
-			  dev_name(&ch->tmu->pdev->dev), ch);
+			  ch->tmu->name, ch);
 	if (ret) {
-		dev_err(&ch->tmu->pdev->dev, "ch%u: failed to request irq %d\n",
-			ch->index, ch->irq);
+		pr_err("%s ch%u: failed to request irq %d\n",
+		       ch->tmu->name, ch->index, ch->irq);
 		return;
 	}
 }
@@ -465,28 +476,36 @@ static int sh_tmu_channel_setup(struct sh_tmu_channel *ch, unsigned int index,
 	else
 		ch->base = tmu->mapbase + 8 + ch->index * 12;
 
-	ch->irq = platform_get_irq(tmu->pdev, index);
+	if (tmu->pdev)
+		ch->irq = platform_get_irq(tmu->pdev, index);
+	if (tmu->np)
+		ch->irq = of_irq_get(tmu->np, index);
+
 	if (ch->irq < 0)
 		return ch->irq;
 
 	ch->cs_enabled = false;
 	ch->enable_count = 0;
 
-	return sh_tmu_register(ch, dev_name(&tmu->pdev->dev),
-			       clockevent, clocksource);
+	return sh_tmu_register(ch, tmu->name, clockevent, clocksource);
 }
 
 static int sh_tmu_map_memory(struct sh_tmu_device *tmu)
 {
 	struct resource *res;
 
-	res = platform_get_resource(tmu->pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&tmu->pdev->dev, "failed to get I/O memory\n");
-		return -ENXIO;
+	if (tmu->pdev) {
+		res = platform_get_resource(tmu->pdev, IORESOURCE_MEM, 0);
+		if (!res) {
+			pr_err("sh_tmu failed to get I/O memory\n");
+			return -ENXIO;
+		}
+
+		tmu->mapbase = ioremap(res->start, resource_size(res));
 	}
+	if (tmu->np)
+		tmu->mapbase = of_iomap(tmu->np, 0);
 
-	tmu->mapbase = ioremap(res->start, resource_size(res));
 	if (tmu->mapbase == NULL)
 		return -ENXIO;
 
@@ -495,7 +514,12 @@ static int sh_tmu_map_memory(struct sh_tmu_device *tmu)
 
 static int sh_tmu_parse_dt(struct sh_tmu_device *tmu)
 {
-	struct device_node *np = tmu->pdev->dev.of_node;
+	struct device_node *np;
+
+	if (tmu->pdev)
+		np = tmu->pdev->dev.of_node;
+	if (tmu->np)
+		np = tmu->np;
 
 	tmu->model = SH_TMU;
 	tmu->num_channels = 3;
@@ -503,45 +527,19 @@ static int sh_tmu_parse_dt(struct sh_tmu_device *tmu)
 	of_property_read_u32(np, "#renesas,channels", &tmu->num_channels);
 
 	if (tmu->num_channels != 2 && tmu->num_channels != 3) {
-		dev_err(&tmu->pdev->dev, "invalid number of channels %u\n",
-			tmu->num_channels);
+		pr_err("%s: invalid number of channels %u\n",
+		       tmu->name, tmu->num_channels);
 		return -EINVAL;
 	}
 
 	return 0;
 }
 
-static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
+static int sh_tmu_setup(struct sh_tmu_device *tmu)
 {
 	unsigned int i;
 	int ret;
 
-	tmu->pdev = pdev;
-
-	raw_spin_lock_init(&tmu->lock);
-
-	if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
-		ret = sh_tmu_parse_dt(tmu);
-		if (ret < 0)
-			return ret;
-	} else if (pdev->dev.platform_data) {
-		const struct platform_device_id *id = pdev->id_entry;
-		struct sh_timer_config *cfg = pdev->dev.platform_data;
-
-		tmu->model = id->driver_data;
-		tmu->num_channels = hweight8(cfg->channels_mask);
-	} else {
-		dev_err(&tmu->pdev->dev, "missing platform data\n");
-		return -ENXIO;
-	}
-
-	/* Get hold of clock. */
-	tmu->clk = clk_get(&tmu->pdev->dev, "fck");
-	if (IS_ERR(tmu->clk)) {
-		dev_err(&tmu->pdev->dev, "cannot get clock\n");
-		return PTR_ERR(tmu->clk);
-	}
-
 	ret = clk_prepare(tmu->clk);
 	if (ret < 0)
 		goto err_clk_put;
@@ -557,7 +555,7 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
 	/* Map the memory resource. */
 	ret = sh_tmu_map_memory(tmu);
 	if (ret < 0) {
-		dev_err(&tmu->pdev->dev, "failed to remap I/O memory\n");
+		pr_err("%s: failed to remap I/O memory\n", tmu->name);
 		goto err_clk_unprepare;
 	}
 
@@ -580,8 +578,6 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
 			goto err_unmap;
 	}
 
-	platform_set_drvdata(pdev, tmu);
-
 	return 0;
 
 err_unmap:
@@ -594,6 +590,39 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
 	return ret;
 }
 
+static int sh_tmu_setup_pdev(struct sh_tmu_device *tmu, struct platform_device *pdev)
+{
+	int ret;
+
+	tmu->pdev = pdev;
+
+	raw_spin_lock_init(&tmu->lock);
+
+	if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
+		ret = sh_tmu_parse_dt(tmu);
+		if (ret < 0)
+			return ret;
+	} else if (pdev->dev.platform_data) {
+		const struct platform_device_id *id = pdev->id_entry;
+		struct sh_timer_config *cfg = pdev->dev.platform_data;
+
+		tmu->model = id->driver_data;
+		tmu->num_channels = hweight8(cfg->channels_mask);
+	} else {
+		dev_err(&tmu->pdev->dev, "missing platform data\n");
+		return -ENXIO;
+	}
+
+	tmu->name = dev_name(&pdev->dev);
+	tmu->clk = clk_get(&tmu->pdev->dev, "fck");
+	if (IS_ERR(tmu->clk)) {
+		dev_err(&tmu->pdev->dev, "cannot get clock\n");
+		return PTR_ERR(tmu->clk);
+	}
+
+	return sh_tmu_setup(tmu);
+}
+
 static int sh_tmu_probe(struct platform_device *pdev)
 {
 	struct sh_tmu_device *tmu = platform_get_drvdata(pdev);
@@ -613,12 +642,13 @@ static int sh_tmu_probe(struct platform_device *pdev)
 	if (tmu == NULL)
 		return -ENOMEM;
 
-	ret = sh_tmu_setup(tmu, pdev);
+	ret = sh_tmu_setup_pdev(tmu, pdev);
 	if (ret) {
 		kfree(tmu);
 		pm_runtime_idle(&pdev->dev);
 		return ret;
 	}
+	platform_set_drvdata(pdev, tmu);
 
 	if (is_sh_early_platform_device(pdev))
 		return 0;
@@ -632,6 +662,45 @@ static int sh_tmu_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static int sh_tmu_setup_of(struct sh_tmu_device *tmu, struct device_node *np)
+{
+	int ret;
+
+	tmu->np = np;
+	raw_spin_lock_init(&tmu->lock);
+
+	ret = sh_tmu_parse_dt(tmu);
+	if (ret < 0)
+		return ret;
+
+	tmu->clk = of_clk_get(np, 0);
+	tmu->name = of_node_full_name(np);
+
+	if (IS_ERR(tmu->clk)) {
+		pr_err("%pOF: cannot get clock\n", np);
+		return PTR_ERR(tmu->clk);
+	}
+
+	return sh_tmu_setup(tmu);
+}
+
+static int __init sh_tmu_of_register(struct device_node *np)
+{
+	struct sh_tmu_device *tmu;
+	int ret;
+
+	tmu = kzalloc(sizeof(*tmu), GFP_KERNEL);
+	if (tmu == NULL)
+		return -ENOMEM;
+
+	ret = sh_tmu_setup_of(tmu, np);
+	if (ret) {
+		kfree(tmu);
+		pr_warn("%pOF: Timer register failed (%d)", np, ret);
+	}
+	return ret;
+}
+
 static const struct platform_device_id sh_tmu_id_table[] = {
 	{ "sh-tmu", SH_TMU },
 	{ "sh-tmu-sh3", SH_TMU_SH3 },
@@ -665,6 +734,7 @@ static void __exit sh_tmu_exit(void)
 	platform_driver_unregister(&sh_tmu_device_driver);
 }
 
+TIMER_OF_DECLARE(sh_tmu, "renesas,tmu", sh_tmu_of_register);
 #ifdef CONFIG_SUPERH
 sh_early_platform_init("earlytimer", &sh_tmu_device_driver);
 #endif
-- 
2.39.2

[PATCH v7 09/37] dt-binding: Add compatible SH7750 SoC

[Yoshinori Sato]

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 Documentation/devicetree/bindings/timer/renesas,tmu.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/timer/renesas,tmu.yaml b/Documentation/devicetree/bindings/timer/renesas,tmu.yaml
index 84bbe15028a1..265d286ffb2f 100644
--- a/Documentation/devicetree/bindings/timer/renesas,tmu.yaml
+++ b/Documentation/devicetree/bindings/timer/renesas,tmu.yaml
@@ -39,6 +39,7 @@ properties:
           - renesas,tmu-r8a779a0 # R-Car V3U
           - renesas,tmu-r8a779f0 # R-Car S4-8
           - renesas,tmu-r8a779g0 # R-Car V4H
+          - renesas,tmu-sh7750   # SH7750
       - const: renesas,tmu
 
   reg:
@@ -96,6 +97,7 @@ if:
             - renesas,tmu-r8a7740
             - renesas,tmu-r8a7778
             - renesas,tmu-r8a7779
+            - renesas,tmu-sh7750
 then:
   required:
     - resets
-- 
2.39.2

[PATCH v7 10/37] sh: Common PCI Framework driver support.

[Yoshinori Sato]

Add New OF based PCI Host driver.
This driver conflicts some point in legacy PCI driver.
To resolve the conflict, I made some changes to the legacy driver.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/include/asm/io.h  |  6 ++++++
 arch/sh/include/asm/pci.h |  4 ++++
 arch/sh/kernel/iomap.c    | 18 ++++++++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 5c544cf5201b..29b5f996cde3 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -20,6 +20,7 @@
 #include <asm/page.h>
 #include <linux/pgtable.h>
 #include <asm-generic/iomap.h>
+#include <linux/ioport.h>
 
 #define __IO_PREFIX     generic
 #include <asm/io_generic.h>
@@ -310,4 +311,9 @@ unsigned long long poke_real_address_q(unsigned long long addr,
 int valid_phys_addr_range(phys_addr_t addr, size_t size);
 int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
 
+#if defined(CONFIG_PCI) && !defined(CONFIG_GENERIC_IOMAP)
+#define pci_remap_iospace pci_remap_iospace
+int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
+#endif
+
 #endif /* __ASM_SH_IO_H */
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h
index 54c30126ea17..92b3bd604319 100644
--- a/arch/sh/include/asm/pci.h
+++ b/arch/sh/include/asm/pci.h
@@ -2,6 +2,7 @@
 #ifndef __ASM_SH_PCI_H
 #define __ASM_SH_PCI_H
 
+#ifndef CONFIG_SH_DEVICE_TREE
 /* Can be used to override the logic in pci_scan_bus for skipping
    already-configured bus numbers - to be used for buggy BIOSes
    or architectures with incomplete PCI setup by the loader */
@@ -88,4 +89,7 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 	return hose->need_domain_info;
 }
 
+#else /* CONFIG_SH_DEVICE_TREE */
+#include <asm-generic/pci.h>
+#endif
 #endif /* __ASM_SH_PCI_H */
diff --git a/arch/sh/kernel/iomap.c b/arch/sh/kernel/iomap.c
index 0a0dff4e66de..d1b8e496ca23 100644
--- a/arch/sh/kernel/iomap.c
+++ b/arch/sh/kernel/iomap.c
@@ -160,3 +160,21 @@ void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 	mmio_outsl(addr, src, count);
 }
 EXPORT_SYMBOL(iowrite32_rep);
+
+#if defined(pci_remap_iospace)
+int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr)
+{
+	unsigned long vaddr = res->start;
+
+	if (!(res->flags & IORESOURCE_IO))
+		return -EINVAL;
+
+	if (res->end > IO_SPACE_LIMIT)
+		return -EINVAL;
+
+	__set_io_port_base(phys_addr);
+	return vmap_page_range(vaddr, vaddr + resource_size(res), phys_addr,
+			       pgprot_device(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(pci_remap_iospace);
+#endif
-- 
2.39.2

[PATCH v7 11/37] pci: pci-sh7751: Add SH7751 PCI driver

[Yoshinori Sato]

Renesas SH7751 CPU Internal PCI Controller driver.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 drivers/pci/controller/Kconfig      |   9 +
 drivers/pci/controller/Makefile     |   1 +
 drivers/pci/controller/pci-sh7751.c | 342 ++++++++++++++++++++++++++++
 3 files changed, 352 insertions(+)
 create mode 100644 drivers/pci/controller/pci-sh7751.c

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index e534c02ee34f..a2fd917a2e03 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -353,6 +353,15 @@ config PCIE_XILINX_CPM
 	  Say 'Y' here if you want kernel support for the
 	  Xilinx Versal CPM host bridge.
 
+config PCI_SH7751
+	bool "Renesas SH7751 PCI controller"
+	depends on OF
+	depends on CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R || COMPILE_TEST
+	select PCI_HOST_COMMON
+	help
+	  Say 'Y' here if you want kernel to support the Renesas SH7751 PCI
+	  Host Bridge driver.
+
 source "drivers/pci/controller/cadence/Kconfig"
 source "drivers/pci/controller/dwc/Kconfig"
 source "drivers/pci/controller/mobiveil/Kconfig"
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index f2b19e6174af..aa97e5d74e58 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o
 obj-$(CONFIG_PCIE_HISI_ERR) += pcie-hisi-error.o
 obj-$(CONFIG_PCIE_APPLE) += pcie-apple.o
 obj-$(CONFIG_PCIE_MT7621) += pcie-mt7621.o
+obj-$(CONFIG_PCI_SH7751) += pci-sh7751.o
 
 # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
 obj-y				+= dwc/
diff --git a/drivers/pci/controller/pci-sh7751.c b/drivers/pci/controller/pci-sh7751.c
new file mode 100644
index 000000000000..a5340689f737
--- /dev/null
+++ b/drivers/pci/controller/pci-sh7751.c
@@ -0,0 +1,342 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SH7751 PCI driver
+ * Copyright (C) 2023 Yoshinori Sato
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/pci-ecam.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/dma-direct.h>
+#include <asm/addrspace.h>
+
+/* PCICR and PCICLKCR write enable magic key */
+#define PCIC_WE_KEY		(0xa5 << 24)
+
+/* PCIC registers */
+/* 0x0000 - 0x00ff mapped to PCI device configuration space */
+#define PCIC_PCICR		0x100	/* PCI Control Register */
+#define PCIC_PCICR_TRSB		BIT(9)	/* Target Read Single */
+#define PCIC_PCICR_BSWP		BIT(8)	/* Target Byte Swap */
+#define PCIC_PCICR_PLUP		BIT(7)	/* Enable PCI Pullup */
+#define PCIC_PCICR_ARBM		BIT(6)	/* PCI Arbitration Mode */
+#define PCIC_PCICR_MD10		BIT(5)	/* MD10 status */
+#define PCIC_PCICR_MD9		BIT(4)	/* MD9 status */
+#define PCIC_PCICR_SERR		BIT(3)	/* SERR output assert */
+#define PCIC_PCICR_INTA		BIT(2)	/* INTA output assert */
+#define PCIC_PCICR_PRST		BIT(1)	/* PCI Reset Assert */
+#define PCIC_PCICR_CFIN		BIT(0)	/* Central Fun. Init Done */
+
+#define PCIC_PCILSR0		0x104	/* PCI Local Space Register0 */
+#define PCIC_PCILSR1		0x108	/* PCI Local Space Register1 */
+#define PCIC_PCILAR0		0x10c	/* PCI Local Addr Register1 */
+#define PCIC_PCILAR1		0x110	/* PCI Local Addr Register1 */
+#define PCIC_PCIINT		0x114	/* PCI Interrupt Register */
+#define PCIC_PCIINTM		0x118	/* PCI Interrupt Mask */
+#define PCIC_PCIALR		0x11c	/* Error Address Register */
+#define PCIC_PCICLR		0x120	/* Error Command/Data */
+#define PCIC_PCIAINT		0x130	/* Arbiter Interrupt Register */
+#define PCIC_PCIAINTM		0x134	/* Arbiter Int. Mask Register */
+#define PCIC_PCIBMLR		0x138	/* Error Bus Master Register */
+#define PCIC_PCIDMABT		0x140	/* DMA Transfer Arb. Register */
+#define PCIC_PCIPAR		0x1c0	/* PIO Address Register */
+#define PCIC_PCIMBR		0x1c4	/* Memory Base Address */
+#define PCIC_PCIIOBR		0x1c8	/* I/O Base Address Register */
+
+#define PCIC_PCIPINT		0x1cc	/* Power Mgmnt Int. Register */
+#define PCIC_PCIPINT_D3		BIT(1)	/* D3 Pwr Mgmt. Interrupt */
+#define PCIC_PCIPINT_D0		BIT(0)	/* D0 Pwr Mgmt. Interrupt */
+
+#define PCIC_PCIPINTM		0x1d0	/* Power Mgmnt Mask Register */
+#define PCIC_PCICLKR		0x1d4	/* Clock Ctrl. Register */
+#define PCIC_PCIBCR1		0x1e0	/* Memory BCR1 Register */
+#define PCIC_PCIBCR2		0x1e4	/* Memory BCR2 Register */
+#define PCIC_PCIWCR1		0x1e8	/* Wait Control 1 Register */
+#define PCIC_PCIWCR2		0x1ec	/* Wait Control 2 Register */
+#define PCIC_PCIWCR3		0x1f0	/* Wait Control 3 Register */
+#define PCIC_PCIMCR		0x1f4	/* Memory Control Register */
+#define PCIC_PCIBCR3		0x1f8	/* Memory BCR3 Register */
+#define PCIC_PCIPDR		0x220	/* Port IO Data Register */
+
+/* PCI IDs */
+/* Hitachi is the company that led to Renesas. */
+/* The SH7751 was designed by Hitachi, so it has a Hitachi ID. */
+#define PCI_VENDOR_ID_HITACHI	0x1054
+#define PCI_DEVICE_ID_SH7751	0x3505
+#define PCI_DEVICE_ID_SH7751R	0x350e
+
+/* BSC registers */
+/* Copy BSC setting to PCI BSC */
+#define BSC_BCR1		0x0000
+#define BSC_BCR1_SLAVE		BIT(30)
+#define BSC_BCR1_BRQEN		BIT(19)
+#define BSC_BCR2		0x0004
+#define BSC_BCR3		0x0050
+#define BSC_WCR1		0x0008
+#define BSC_WCR2		0x000c
+#define BSC_WCR3		0x0010
+#define BSC_MCR			0x0014
+#define BSC_MCR_MRSET		BIT(30)
+#define BSC_MCR_RFSH		BIT(2)
+
+/* PCIC access wrapper */
+#define pcic_writel(val, base, reg)	writel(val, base + (reg))
+#define pcic_readl(base, reg)		readl(base + (reg))
+
+/*
+ * We need to avoid collisions with `mirrored' VGA ports
+ * and other strange ISA hardware, so we always want the
+ * addresses to be allocated in the 0x000-0x0ff region
+ * modulo 0x400.
+ */
+#define IO_REGION_BASE 0x1000
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+				resource_size_t size, resource_size_t align)
+{
+	resource_size_t start = res->start;
+
+	if (res->flags & IORESOURCE_IO) {
+		if (start < PCIBIOS_MIN_IO + IO_REGION_BASE)
+			start = PCIBIOS_MIN_IO + IO_REGION_BASE;
+
+		/*
+		 * Put everything into 0x00-0xff region modulo 0x400.
+		 */
+		if (start & 0x300)
+			start = (start + 0x3ff) & ~0x3ff;
+	}
+
+	return start;
+}
+
+static int setup_pci_bsc(struct device *dev, void __iomem *pcic,
+			 void __iomem *bsc, unsigned int area, bool bcr3)
+{
+	u32 word;
+
+	word = __raw_readl(bsc + BSC_BCR1);
+	/* check BCR for SDRAM in area */
+	if (((word >> area) & 1) == 0) {
+		dev_err(dev, "Area %u is not configured for SDRAM. BCR1=0x%x\n",
+			area, word);
+		return -EINVAL;
+	}
+	word |= BSC_BCR1_SLAVE;		/* PCIC BSC is slave only */
+	pcic_writel(word, pcic, PCIC_PCIBCR1);
+
+	word = __raw_readw(bsc + BSC_BCR2);
+	/* check BCR2 for 32bit SDRAM interface*/
+	if (((word >> (area << 1)) & 0x3) != 0x3) {
+		dev_err(dev, "Area %u is not 32 bit SDRAM. BCR2=0x%x\n",
+			area, word);
+		return -EINVAL;
+	}
+	pcic_writel(word, pcic, PCIC_PCIBCR2);
+
+	if (bcr3) {
+		/* BCR3 have only SH7751R */
+		word = __raw_readw(bsc + BSC_BCR3);
+		pcic_writel(word, pcic, PCIC_PCIBCR3);
+	}
+
+	/* configure the wait control registers */
+	word = __raw_readl(bsc + BSC_WCR1);
+	pcic_writel(word, pcic, PCIC_PCIWCR1);
+	word = __raw_readl(bsc + BSC_WCR2);
+	pcic_writel(word, pcic, PCIC_PCIWCR2);
+	word = __raw_readl(bsc + BSC_WCR3);
+	pcic_writel(word, pcic, PCIC_PCIWCR3);
+	word = __raw_readl(bsc + BSC_MCR);
+	/* Clear MRSET and RFSH bit */
+	word &= ~(BSC_MCR_MRSET | BSC_MCR_RFSH);
+	pcic_writel(word, pcic, PCIC_PCIMCR);
+
+	return 0;
+}
+
+#define NUM_AREA 7
+static int set_pci_ranges(struct device *dev,
+			  void __iomem *pcic, void __iomem *bsc, bool bcr3)
+{
+	struct resource_entry *dma, *tmp;
+	struct pci_host_bridge *bridge;
+	u32 bsc_done[NUM_AREA];
+	unsigned int la;
+
+	bridge = dev_get_drvdata(dev);
+	pcic_writel(0, pcic, PCIC_PCILAR0);
+	pcic_writel(0, pcic, PCIC_PCILAR1);
+	la = 0;
+	memset(&bsc_done, 0, sizeof(bsc_done));
+	resource_list_for_each_entry_safe(dma, tmp, &bridge->dma_ranges) {
+		struct resource *res = dma->res;
+		unsigned int area;
+		u32 word;
+
+		switch (resource_type(res)) {
+		case IORESOURCE_IO:
+			/* BAR0 is I/O space */
+			word = res->start | 1;
+			pcic_writel(word, pcic, PCI_BASE_ADDRESS_0);
+			word = pcic_readl(pcic, PCI_COMMAND);
+			word |= PCI_COMMAND_IO;
+			pcic_writel(word, pcic, PCI_COMMAND);
+			break;
+		case IORESOURCE_MEM:
+			if (la > 4) {
+				dev_err(dev, "Invalid range definition.\n");
+				return -EINVAL;
+			}
+			area = (res->start >> 26) & 0x07;
+			word = res->end - res->start;
+			if (area >= NUM_AREA) {
+				/* Area 7 is reserved. */
+				dev_info(dev, "Invalid local address 0x%08x. Ignore it.\n",
+					 res->start);
+				break;
+			}
+			pcic_writel(res->start, pcic, PCI_BASE_ADDRESS_1 + la);
+			/* if dummy entry, skip BSC setup */
+			if (word < 4)
+				break;
+			/* BAR1 is local area 0, BAR2 is local area 1 */
+			pcic_writel(word, pcic, PCIC_PCILSR0 + la);
+			word = P2SEGADDR(res->start);
+			pcic_writel(word, pcic, PCIC_PCILAR0 + la);
+			la += 4;
+			if (!bsc_done[area]) {
+				/* check BCR for SDRAM in specified area. And setup PCI BSC. */
+				if (setup_pci_bsc(dev, pcic, bsc, area, bcr3))
+					return -EINVAL;
+				bsc_done[area] = 1;
+			}
+			break;
+		}
+	}
+	return 0;
+}
+
+static int sh7751_pci_probe(struct platform_device *pdev)
+{
+	struct resource *res, *bscres;
+	void __iomem *pcic;
+	void __iomem *bsc;
+	u16 vid, did;
+	u32 word;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (IS_ERR(res))
+		return PTR_ERR(res);
+	pcic = ioremap(res->start, res->end - res->start + 1);
+
+	bscres = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	bsc = devm_ioremap_resource(&pdev->dev, bscres);
+	if (IS_ERR(bsc))
+		return PTR_ERR(bsc);
+
+	/* check for SH7751/SH7751R hardware */
+	word = pcic_readl(pcic, PCI_VENDOR_ID);
+	vid = word & 0xffff;
+	did = word >> 16;
+	if ((vid != PCI_VENDOR_ID_HITACHI) ||
+	    ((did != PCI_DEVICE_ID_SH7751) &&
+	     (did != PCI_DEVICE_ID_SH7751R))) {
+		dev_err(&pdev->dev, "This is not an SH7751(R)\n");
+		return -ENODEV;
+	}
+	dev_info(&pdev->dev, "PCI core found at %pR\n", res);
+
+	/* Set the BCR's to enable PCI access */
+	word = __raw_readl(bsc + BSC_BCR1);
+	word |= BSC_BCR1_BRQEN;
+	__raw_writel(word, bsc + BSC_BCR1);
+
+	/* Turn the clocks back on (not done in reset)*/
+	pcic_writel(PCIC_WE_KEY | 0, pcic, PCIC_PCICLKR);
+	/* Clear Powerdown IRQ's (not done in reset) */
+	word = PCIC_PCIPINT_D3 | PCIC_PCIPINT_D0;
+	pcic_writel(word, pcic, PCIC_PCIPINT);
+
+	/* set the command/status */
+	word = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
+		PCI_COMMAND_PARITY | PCI_COMMAND_WAIT;
+	pcic_writel(word, pcic, PCI_COMMAND);
+
+	/* define this host as the host bridge */
+	word = PCI_BASE_CLASS_BRIDGE << 24;
+	pcic_writel(word, pcic, PCI_CLASS_REVISION);
+
+	ret = pci_host_common_probe(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Initialize failed (%d)\n", ret);
+		return ret;
+	}
+
+	/* Set IO and Mem windows to local address */
+	if (set_pci_ranges(&pdev->dev, pcic, bsc,
+			   did == PCI_DEVICE_ID_SH7751R))
+		return -EINVAL;
+	pcic_writel(0, pcic, PCIC_PCIIOBR);
+
+	if (of_property_read_bool(pdev->dev.of_node, "renesas,bus-arbit-round-robin"))
+		word |= BIT(0);
+	else
+		word = 0;
+	pcic_writel(word, pcic, PCIC_PCIDMABT);
+
+	/* SH7751 init done, set central function init complete */
+	/* use round robin mode to stop a device starving/overrunning */
+	word = PCIC_PCICR_CFIN | PCIC_PCICR_ARBM;
+	pcic_writel(PCIC_WE_KEY | word, pcic, PCIC_PCICR);
+
+	return 0;
+}
+
+/*
+ * Direct access to PCI hardware...
+ */
+#define CONFIG_CMD(bus, devfn, where) \
+	(0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
+
+static void __iomem *sh4_pci_map_bus(struct pci_bus *bus,
+				     unsigned int devfn, int where)
+{
+	struct pci_config_window *cfg = bus->sysdata;
+	void __iomem *pcic = (void __iomem *)cfg->res.start;
+
+	pcic_writel(CONFIG_CMD(bus, devfn, where), pcic, PCIC_PCIPAR);
+	return pcic + PCIC_PCIPDR;
+}
+
+static const struct pci_ecam_ops pci_sh7751_bus_ops = {
+	.pci_ops	= {
+		.map_bus = sh4_pci_map_bus,
+		.read    = pci_generic_config_read32,
+		.write   = pci_generic_config_write32,
+	}
+};
+
+static const struct of_device_id sh7751_pci_of_match[] = {
+	{ .compatible = "renesas,sh7751-pci",
+	  .data = &pci_sh7751_bus_ops },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sh7751_pci_of_match);
+
+static struct platform_driver sh7751_pci_driver = {
+	.driver = {
+		.name = "sh7751-pci",
+		.of_match_table = sh7751_pci_of_match,
+	},
+	.probe = sh7751_pci_probe,
+};
+module_platform_driver(sh7751_pci_driver);
+
+MODULE_DESCRIPTION("SH7751 PCI driver");
-- 
2.39.2

[PATCH v7 12/37] dt-bindings: pci: pci-sh7751: Add SH7751 PCI

[Yoshinori Sato]

Renesas SH7751 PCI Controller json-schema.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 .../bindings/pci/renesas,sh7751-pci.yaml      | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/renesas,sh7751-pci.yaml

diff --git a/Documentation/devicetree/bindings/pci/renesas,sh7751-pci.yaml b/Documentation/devicetree/bindings/pci/renesas,sh7751-pci.yaml
new file mode 100644
index 000000000000..115c2bb67339
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/renesas,sh7751-pci.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/renesas,sh7751-pci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas SH7751 PCI Host controller
+
+maintainers:
+  - Yoshinori Sato <ysato@users.sourceforge.jp>
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+  compatible:
+    const: renesas,sh7751-pci
+
+  reg:
+    minItems: 2
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: PCI Controller
+      - const: Bus State Controller
+
+  "#interrupt-cells":
+    const: 1
+
+  "#address-cells":
+    const: 3
+
+  "#size-cells":
+    const: 2
+
+  ranges: true
+
+  dma-ranges: true
+
+  interrupt-controller: true
+
+  renesas,bus-arbit-round-robin:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      Set DMA bus arbitration to round robin.
+
+required:
+  - compatible
+  - reg
+  - "#interrupt-cells"
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+  - interrupt-map
+  - interrupt-map-mask
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    pci@fe200000 {
+            compatible = "renesas,sh7751-pci";
+            #address-cells = <3>;
+            #size-cells = <2>;
+            #interrupt-cells = <1>;
+            interrupt-controller;
+            device_type = "pci";
+            bus-range = <0 0>;
+            ranges = <0x02000000 0 0xfd000000 0xfd000000 0 0x01000000>,
+                     <0x01000000 0 0x00000000 0xfe240000 0 0x00040000>;
+            dma-ranges = <0x02000000 0 0xc000000 0x0c000000 0 0x04000000>;
+            reg = <0xfe200000 0x0400>,
+                  <0xff800000 0x0100>;
+            interrupt-map = <0x0000 0 0 1 &julianintc 5 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0000 0 0 2 &julianintc 6 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0000 0 0 3 &julianintc 7 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0000 0 0 4 &julianintc 8 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0800 0 0 1 &julianintc 6 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0800 0 0 2 &julianintc 7 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0800 0 0 3 &julianintc 8 IRQ_TYPE_LEVEL_LOW>,
+                            <0x0800 0 0 4 &julianintc 5 IRQ_TYPE_LEVEL_LOW>,
+                            <0x1000 0 0 1 &julianintc 7 IRQ_TYPE_LEVEL_LOW>,
+                            <0x1000 0 0 2 &julianintc 8 IRQ_TYPE_LEVEL_LOW>,
+                            <0x1000 0 0 3 &julianintc 5 IRQ_TYPE_LEVEL_LOW>,
+                            <0x1000 0 0 4 &julianintc 6 IRQ_TYPE_LEVEL_LOW>;
+            interrupt-map-mask = <0x1800 0 0 7>;
+    };
-- 
2.39.2

[PATCH v7 13/37] dt-bindings: clock: sh7750-cpg: Add renesas,sh7750-cpg header.

[Yoshinori Sato]

SH7750 CPG Clock output define.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 .../bindings/clock/renesas,sh7750-cpg.yaml    | 105 ++++++++++++++++++
 include/dt-bindings/clock/sh7750-cpg.h        |  26 +++++
 2 files changed, 131 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/renesas,sh7750-cpg.yaml
 create mode 100644 include/dt-bindings/clock/sh7750-cpg.h

diff --git a/Documentation/devicetree/bindings/clock/renesas,sh7750-cpg.yaml b/Documentation/devicetree/bindings/clock/renesas,sh7750-cpg.yaml
new file mode 100644
index 000000000000..04c10b0834ee
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/renesas,sh7750-cpg.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/renesas,sh7750-cpg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas SH7750/7751 Clock Pulse Generator (CPG)
+
+maintainers:
+  - Yoshinori Sato <ysato@users.sourceforge.jp>
+
+description:
+  The Clock Pulse Generator (CPG) generates core clocks for the SoC.  It
+  includes PLLs, and variable ratio dividers.
+
+  The CPG may also provide a Clock Domain for SoC devices, in combination with
+  the CPG Module Stop (MSTP) Clocks.
+
+properties:
+  compatible:
+    enum:
+      - renesas,sh7750-cpg             # SH7750
+      - renesas,sh7750s-cpg            # SH775S
+      - renesas,sh7750r-cpg            # SH7750R
+      - renesas,sh7751-cpg             # SH7751
+      - renesas,sh7751r-cpg            # SH7751R
+
+  reg: true
+
+  reg-names: true
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: extal
+
+  '#clock-cells':
+    const: 1
+
+  renesas,mode:
+    description: Board-specific settings of the MD[0-2] pins on SoC
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 6
+
+  '#power-domain-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,sh7750-cpg
+              - renesas,sh7750s-cpg
+    then:
+      properties:
+        reg:
+          maxItems: 1
+        reg-names:
+          items:
+            - const: FRQCR
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,sh7750r-cpg
+              - renesas,sh7751-cpg
+              - renesas,sh7751r-cpg
+    then:
+      properties:
+        reg:
+          maxItems: 2
+        reg-names:
+          items:
+            - const: FRQCR
+            - const: CLKSTP00
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sh7750-cpg.h>
+    cpg: clock-controller@ffc00000 {
+        #clock-cells = <1>;
+        #power-domain-cells = <0>;
+        compatible = "renesas,sh7751r-cpg";
+        clocks = <&extal>;
+        clock-names = "extal";
+        reg = <0xffc00000 20>, <0xfe0a0000 16>;
+        reg-names = "FRQCR", "CLKSTP00";
+        renesas,mode = <0>;
+    };
diff --git a/include/dt-bindings/clock/sh7750-cpg.h b/include/dt-bindings/clock/sh7750-cpg.h
new file mode 100644
index 000000000000..ec267be91adf
--- /dev/null
+++ b/include/dt-bindings/clock/sh7750-cpg.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+ *
+ * Copyright 2023 Yoshinori Sato
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_SH7750_H__
+#define __DT_BINDINGS_CLOCK_SH7750_H__
+
+#define SH7750_CPG_PLLOUT	0
+
+#define SH7750_CPG_PCK		1
+#define SH7750_CPG_BCK		2
+#define SH7750_CPG_ICK		3
+
+#define SH7750_MSTP_SCI		4
+#define SH7750_MSTP_RTC		5
+#define SH7750_MSTP_TMU012	6
+#define SH7750_MSTP_SCIF	7
+#define SH7750_MSTP_DMAC	8
+#define SH7750_MSTP_UBC		9
+#define SH7750_MSTP_SQ		10
+#define SH7750_CSTP_INTC	11
+#define SH7750_CSTP_TMU34	12
+#define SH7750_CSTP_PCIC	13
+
+#endif
-- 
2.39.2

[PATCH v7 14/37] clk: Compatible with narrow registers

[Yoshinori Sato]

divider and gate only support 32-bit registers.
Older hardware uses narrower registers, so I want to be able to handle
8-bit and 16-bit wide registers.

Seven clk_divider flags are used, and if I add flags for 8bit access and
16bit access, 8bit will not be enough, so I expanded it to u16.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 drivers/clk/clk-divider.c    | 56 +++++++++++++++++++++-----------
 drivers/clk/clk-gate.c       | 62 ++++++++++++++++++++++++++++--------
 include/linux/clk-provider.h | 22 ++++++++++---
 3 files changed, 103 insertions(+), 37 deletions(-)

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index a2c2b5203b0a..a1b5187cd63d 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -26,20 +26,38 @@
  * parent - fixed parent.  No clk_set_parent support
  */
 
-static inline u32 clk_div_readl(struct clk_divider *divider)
-{
-	if (divider->flags & CLK_DIVIDER_BIG_ENDIAN)
-		return ioread32be(divider->reg);
-
-	return readl(divider->reg);
+static inline u32 clk_div_read(struct clk_divider *divider)
+{
+	if (divider->flags & CLK_DIVIDER_REG_8BIT)
+		return readb(divider->reg);
+	else if (divider->flags & CLK_DIVIDER_REG_16BIT) {
+		if (divider->flags & CLK_DIVIDER_BIG_ENDIAN)
+			return ioread16be(divider->reg);
+		else
+			return readw(divider->reg);
+	} else {
+		if (divider->flags & CLK_DIVIDER_BIG_ENDIAN)
+			return ioread32be(divider->reg);
+		else
+			return readl(divider->reg);
+	}
 }
 
-static inline void clk_div_writel(struct clk_divider *divider, u32 val)
+static inline void clk_div_write(struct clk_divider *divider, u32 val)
 {
-	if (divider->flags & CLK_DIVIDER_BIG_ENDIAN)
-		iowrite32be(val, divider->reg);
-	else
-		writel(val, divider->reg);
+	if (divider->flags & CLK_DIVIDER_REG_8BIT)
+		writeb(val, divider->reg);
+	else if (divider->flags & CLK_DIVIDER_REG_16BIT) {
+		if (divider->flags & CLK_DIVIDER_BIG_ENDIAN)
+			iowrite16be(val, divider->reg);
+		else
+			writew(val, divider->reg);
+	} else {
+		if (divider->flags & CLK_DIVIDER_BIG_ENDIAN)
+			iowrite32be(val, divider->reg);
+		else
+			writel(val, divider->reg);
+	}
 }
 
 static unsigned int _get_table_maxdiv(const struct clk_div_table *table,
@@ -152,7 +170,7 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw,
 	struct clk_divider *divider = to_clk_divider(hw);
 	unsigned int val;
 
-	val = clk_div_readl(divider) >> divider->shift;
+	val = clk_div_read(divider) >> divider->shift;
 	val &= clk_div_mask(divider->width);
 
 	return divider_recalc_rate(hw, parent_rate, val, divider->table,
@@ -434,7 +452,7 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
 	if (divider->flags & CLK_DIVIDER_READ_ONLY) {
 		u32 val;
 
-		val = clk_div_readl(divider) >> divider->shift;
+		val = clk_div_read(divider) >> divider->shift;
 		val &= clk_div_mask(divider->width);
 
 		return divider_ro_round_rate(hw, rate, prate, divider->table,
@@ -455,7 +473,7 @@ static int clk_divider_determine_rate(struct clk_hw *hw,
 	if (divider->flags & CLK_DIVIDER_READ_ONLY) {
 		u32 val;
 
-		val = clk_div_readl(divider) >> divider->shift;
+		val = clk_div_read(divider) >> divider->shift;
 		val &= clk_div_mask(divider->width);
 
 		return divider_ro_determine_rate(hw, req, divider->table,
@@ -505,11 +523,11 @@ static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
 	if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
 		val = clk_div_mask(divider->width) << (divider->shift + 16);
 	} else {
-		val = clk_div_readl(divider);
+		val = clk_div_read(divider);
 		val &= ~(clk_div_mask(divider->width) << divider->shift);
 	}
 	val |= (u32)value << divider->shift;
-	clk_div_writel(divider, val);
+	clk_div_write(divider, val);
 
 	if (divider->lock)
 		spin_unlock_irqrestore(divider->lock, flags);
@@ -538,7 +556,7 @@ struct clk_hw *__clk_hw_register_divider(struct device *dev,
 		struct device_node *np, const char *name,
 		const char *parent_name, const struct clk_hw *parent_hw,
 		const struct clk_parent_data *parent_data, unsigned long flags,
-		void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
+		void __iomem *reg, u8 shift, u8 width, u32 clk_divider_flags,
 		const struct clk_div_table *table, spinlock_t *lock)
 {
 	struct clk_divider *div;
@@ -610,7 +628,7 @@ EXPORT_SYMBOL_GPL(__clk_hw_register_divider);
 struct clk *clk_register_divider_table(struct device *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		void __iomem *reg, u8 shift, u8 width,
-		u8 clk_divider_flags, const struct clk_div_table *table,
+		u32 clk_divider_flags, const struct clk_div_table *table,
 		spinlock_t *lock)
 {
 	struct clk_hw *hw;
@@ -664,7 +682,7 @@ struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
 		struct device_node *np, const char *name,
 		const char *parent_name, const struct clk_hw *parent_hw,
 		const struct clk_parent_data *parent_data, unsigned long flags,
-		void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
+		void __iomem *reg, u8 shift, u8 width, u32 clk_divider_flags,
 		const struct clk_div_table *table, spinlock_t *lock)
 {
 	struct clk_hw **ptr, *hw;
diff --git a/drivers/clk/clk-gate.c b/drivers/clk/clk-gate.c
index 68e585a02fd9..65191f9684ff 100644
--- a/drivers/clk/clk-gate.c
+++ b/drivers/clk/clk-gate.c
@@ -24,20 +24,38 @@
  * parent - fixed parent.  No clk_set_parent support
  */
 
-static inline u32 clk_gate_readl(struct clk_gate *gate)
+static inline u32 clk_gate_read(struct clk_gate *gate)
 {
-	if (gate->flags & CLK_GATE_BIG_ENDIAN)
-		return ioread32be(gate->reg);
-
-	return readl(gate->reg);
+	if (gate->flags & CLK_GATE_REG_8BIT)
+		return readb(gate->reg);
+	else if (gate->flags & CLK_GATE_REG_16BIT) {
+		if (gate->flags & CLK_GATE_BIG_ENDIAN)
+			return ioread16be(gate->reg);
+		else
+			return readw(gate->reg);
+	} else {
+		if (gate->flags & CLK_GATE_BIG_ENDIAN)
+			return ioread32be(gate->reg);
+		else
+			return readl(gate->reg);
+	}
 }
 
-static inline void clk_gate_writel(struct clk_gate *gate, u32 val)
+static inline void clk_gate_write(struct clk_gate *gate, u32 val)
 {
-	if (gate->flags & CLK_GATE_BIG_ENDIAN)
-		iowrite32be(val, gate->reg);
-	else
-		writel(val, gate->reg);
+	if (gate->flags & CLK_GATE_REG_8BIT)
+		writeb(val, gate->reg);
+	else if (gate->flags & CLK_GATE_REG_16BIT) {
+		if (gate->flags & CLK_GATE_BIG_ENDIAN)
+			iowrite16be(val, gate->reg);
+		else
+			writew(val, gate->reg);
+	} else {
+		if (gate->flags & CLK_GATE_BIG_ENDIAN)
+			iowrite32be(val, gate->reg);
+		else
+			writel(val, gate->reg);
+	}
 }
 
 /*
@@ -72,7 +90,7 @@ static void clk_gate_endisable(struct clk_hw *hw, int enable)
 		if (set)
 			reg |= BIT(gate->bit_idx);
 	} else {
-		reg = clk_gate_readl(gate);
+		reg = clk_gate_read(gate);
 
 		if (set)
 			reg |= BIT(gate->bit_idx);
@@ -80,7 +98,7 @@ static void clk_gate_endisable(struct clk_hw *hw, int enable)
 			reg &= ~BIT(gate->bit_idx);
 	}
 
-	clk_gate_writel(gate, reg);
+	clk_gate_write(gate, reg);
 
 	if (gate->lock)
 		spin_unlock_irqrestore(gate->lock, flags);
@@ -105,7 +123,7 @@ int clk_gate_is_enabled(struct clk_hw *hw)
 	u32 reg;
 	struct clk_gate *gate = to_clk_gate(hw);
 
-	reg = clk_gate_readl(gate);
+	reg = clk_gate_read(gate);
 
 	/* if a set bit disables this clk, flip it before masking */
 	if (gate->flags & CLK_GATE_SET_TO_DISABLE)
@@ -137,12 +155,30 @@ struct clk_hw *__clk_hw_register_gate(struct device *dev,
 	struct clk_init_data init = {};
 	int ret = -EINVAL;
 
+	/* validate register size option and bit_idx */
 	if (clk_gate_flags & CLK_GATE_HIWORD_MASK) {
 		if (bit_idx > 15) {
 			pr_err("gate bit exceeds LOWORD field\n");
 			return ERR_PTR(-EINVAL);
 		}
 	}
+	if (clk_gate_flags & CLK_GATE_REG_16BIT) {
+		if (bit_idx > 15) {
+			pr_err("gate bit exceeds 16 bits\n");
+			return ERR_PTR(-EINVAL);
+		}
+	}
+	if (clk_gate_flags & CLK_GATE_REG_8BIT) {
+		if (bit_idx > 7) {
+			pr_err("gate bit exceeds 8 bits\n");
+			return ERR_PTR(-EINVAL);
+		}
+	}
+	if ((clk_gate_flags & CLK_GATE_HIWORD_MASK) &&
+	    clk_gate_flags & (CLK_GATE_REG_8BIT | CLK_GATE_REG_16BIT)) {
+		pr_err("HIWORD_MASK required 32-bit register\n");
+		return ERR_PTR(-EINVAL);
+	}
 
 	/* allocate the gate */
 	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 4a537260f655..eaa6ff1d0b2e 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -508,12 +508,16 @@ void of_fixed_clk_setup(struct device_node *np);
  * CLK_GATE_BIG_ENDIAN - by default little endian register accesses are used for
  *	the gate register.  Setting this flag makes the register accesses big
  *	endian.
+ * CLK_GATE_REG_8BIT - by default 32bit register accesses are used for
+ *	the gate register.  Setting this flag makes the register accesses 8bit.
+ * CLK_GATE_REG_16BIT - by default 32bit register accesses are used for
+ *	the gate register.  Setting this flag makes the register accesses 16bit.
  */
 struct clk_gate {
 	struct clk_hw hw;
 	void __iomem	*reg;
 	u8		bit_idx;
-	u8		flags;
+	u32		flags;
 	spinlock_t	*lock;
 };
 
@@ -522,6 +526,8 @@ struct clk_gate {
 #define CLK_GATE_SET_TO_DISABLE		BIT(0)
 #define CLK_GATE_HIWORD_MASK		BIT(1)
 #define CLK_GATE_BIG_ENDIAN		BIT(2)
+#define CLK_GATE_REG_8BIT		BIT(3)
+#define CLK_GATE_REG_16BIT		BIT(4)
 
 extern const struct clk_ops clk_gate_ops;
 struct clk_hw *__clk_hw_register_gate(struct device *dev,
@@ -675,13 +681,17 @@ struct clk_div_table {
  * CLK_DIVIDER_BIG_ENDIAN - By default little endian register accesses are used
  *	for the divider register.  Setting this flag makes the register accesses
  *	big endian.
+ * CLK_DIVIDER_REG_8BIT - by default 32bit register accesses are used for
+ *	the gate register.  Setting this flag makes the register accesses 8bit.
+ * CLK_DIVIDER_REG_16BIT - by default 32bit register accesses are used for
+ *	the gate register.  Setting this flag makes the register accesses 16bit.
  */
 struct clk_divider {
 	struct clk_hw	hw;
 	void __iomem	*reg;
 	u8		shift;
 	u8		width;
-	u8		flags;
+	u16		flags;
 	const struct clk_div_table	*table;
 	spinlock_t	*lock;
 };
@@ -697,6 +707,8 @@ struct clk_divider {
 #define CLK_DIVIDER_READ_ONLY		BIT(5)
 #define CLK_DIVIDER_MAX_AT_ZERO		BIT(6)
 #define CLK_DIVIDER_BIG_ENDIAN		BIT(7)
+#define CLK_DIVIDER_REG_8BIT		BIT(8)
+#define CLK_DIVIDER_REG_16BIT		BIT(9)
 
 extern const struct clk_ops clk_divider_ops;
 extern const struct clk_ops clk_divider_ro_ops;
@@ -726,18 +738,18 @@ struct clk_hw *__clk_hw_register_divider(struct device *dev,
 		struct device_node *np, const char *name,
 		const char *parent_name, const struct clk_hw *parent_hw,
 		const struct clk_parent_data *parent_data, unsigned long flags,
-		void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
+		void __iomem *reg, u8 shift, u8 width, u32 clk_divider_flags,
 		const struct clk_div_table *table, spinlock_t *lock);
 struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
 		struct device_node *np, const char *name,
 		const char *parent_name, const struct clk_hw *parent_hw,
 		const struct clk_parent_data *parent_data, unsigned long flags,
-		void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
+		void __iomem *reg, u8 shift, u8 width, u32 clk_divider_flags,
 		const struct clk_div_table *table, spinlock_t *lock);
 struct clk *clk_register_divider_table(struct device *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		void __iomem *reg, u8 shift, u8 width,
-		u8 clk_divider_flags, const struct clk_div_table *table,
+		u32 clk_divider_flags, const struct clk_div_table *table,
 		spinlock_t *lock);
 /**
  * clk_register_divider - register a divider clock with the clock framework
-- 
2.39.2

[PATCH v7 15/37] clk: renesas: Add SH7750/7751 CPG Driver

[Yoshinori Sato]

Renesas SH7750 and SH7751 series CPG driver.
This driver supported frequency control and clock gating.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 drivers/clk/renesas/Kconfig      |  13 +-
 drivers/clk/renesas/Makefile     |   1 +
 drivers/clk/renesas/clk-sh7750.c | 480 +++++++++++++++++++++++++++++++
 3 files changed, 491 insertions(+), 3 deletions(-)
 create mode 100644 drivers/clk/renesas/clk-sh7750.c

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index d252150402e8..482efcb6e76e 100644
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 
 config CLK_RENESAS
-	bool "Renesas SoC clock support" if COMPILE_TEST && !ARCH_RENESAS
-	default y if ARCH_RENESAS
+	bool "Renesas SoC clock support" if COMPILE_TEST && !ARCH_RENESAS && !SUPERH
+	default y if ARCH_RENESAS || SUPERH
 	select CLK_EMEV2 if ARCH_EMEV2
 	select CLK_RZA1 if ARCH_R7S72100
 	select CLK_R7S9210 if ARCH_R7S9210
@@ -41,6 +41,9 @@ config CLK_RENESAS
 	select CLK_R9A08G045 if ARCH_R9A08G045
 	select CLK_R9A09G011 if ARCH_R9A09G011
 	select CLK_SH73A0 if ARCH_SH73A0
+	select CLK_SH7750 if CPU_SUBTYPE_SH7750 || CPU_SUBTYPE_SH7750S || \
+	                     CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751 || \
+			     CPU_SUBTYPE_SH7751R
 
 if CLK_RENESAS
 
@@ -198,7 +201,6 @@ config CLK_SH73A0
 	select CLK_RENESAS_CPG_MSTP
 	select CLK_RENESAS_DIV6
 
-
 # Family
 config CLK_RCAR_CPG_LIB
 	bool "CPG/MSSR library functions" if COMPILE_TEST
@@ -228,6 +230,11 @@ config CLK_RZG2L
 	bool "Renesas RZ/{G2L,G2UL,G3S,V2L} family clock support" if COMPILE_TEST
 	select RESET_CONTROLLER
 
+config CLK_SH7750
+	bool "Renesas SH7750/7751 family clock support" if COMPILE_TEST
+	help
+	  This is a driver for SH7750 / SH7751 CPG.
+
 # Generic
 config CLK_RENESAS_CPG_MSSR
 	bool "CPG/MSSR clock support" if COMPILE_TEST
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index f7e18679c3b8..ea0ffa8d59c4 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_CLK_R9A07G054)		+= r9a07g044-cpg.o
 obj-$(CONFIG_CLK_R9A08G045)		+= r9a08g045-cpg.o
 obj-$(CONFIG_CLK_R9A09G011)		+= r9a09g011-cpg.o
 obj-$(CONFIG_CLK_SH73A0)		+= clk-sh73a0.o
+obj-$(CONFIG_CLK_SH7750)		+= clk-sh7750.o
 
 # Family
 obj-$(CONFIG_CLK_RCAR_CPG_LIB)		+= rcar-cpg-lib.o
diff --git a/drivers/clk/renesas/clk-sh7750.c b/drivers/clk/renesas/clk-sh7750.c
new file mode 100644
index 000000000000..043269d31200
--- /dev/null
+++ b/drivers/clk/renesas/clk-sh7750.c
@@ -0,0 +1,480 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas SH7750/51 CPG driver
+ *
+ * Copyright 2023 Yoshinori Sato <ysato@users.sourceforge.jp>
+ */
+
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+/* PCLK divide rate selector */
+static const struct clk_div_table pdiv_table[] = {
+	{ .val = 0, .div = 2, },
+	{ .val = 1, .div = 3, },
+	{ .val = 2, .div = 4, },
+	{ .val = 3, .div = 6, },
+	{ .val = 4, .div = 8, },
+	{ }
+};
+
+/* ICLK and BCLK divide rate selector */
+static const struct clk_div_table div_table[] = {
+	{ .val = 0, .div = 1, },
+	{ .val = 1, .div = 2, },
+	{ .val = 2, .div = 3, },
+	{ .val = 3, .div = 4, },
+	{ .val = 4, .div = 6, },
+	{ .val = 5, .div = 8, },
+	{ }
+};
+
+struct cpg_priv {
+	struct clk_hw hw;
+	spinlock_t clklock;
+	void __iomem *frqcr;
+	void __iomem *clkstp00;
+	u32 mode;
+	u32 feat;
+};
+
+/* CPG feature flag */
+#define CPG_DIV1	BIT(0)	/* 7750, 7750S, 7751 */
+#define MSTP_CR2	BIT(1)	/* 7750S, 7750R, 7751, 7751R */
+#define MSTP_CLKSTP	BIT(2)	/* 7750R, 7751, 7751R */
+#define MSTP_CSTP2	BIT(3)	/* 7751, 7751R */
+
+enum {
+	CPG_SH7750,
+	CPG_SH7750S,
+	CPG_SH7750R,
+	CPG_SH7751,
+	CPG_SH7751R,
+};
+
+static const u32 cpg_feature[] = {
+	[CPG_SH7750]  = CPG_DIV1,
+	[CPG_SH7750S] = CPG_DIV1 | MSTP_CR2,
+	[CPG_SH7750R] = MSTP_CR2 | MSTP_CLKSTP,
+	[CPG_SH7751]  = CPG_DIV1 | MSTP_CR2 | MSTP_CLKSTP | MSTP_CSTP2,
+	[CPG_SH7751R] = MSTP_CR2 | MSTP_CLKSTP | MSTP_CSTP2,
+};
+
+enum clk_type {CLK_DIV, CLK_STBCR, CLK_STBCR2, CLK_CLKSTP00};
+
+enum {
+	FRQCR = 0,
+	STBCR = 4,
+	WTCNT = 8,
+	WTCSR = 12,
+	STBCR2 = 16,
+	CLKSTP00 = 0,
+	CLKSTPCLR00 = 8,
+};
+
+static struct cpg_priv *cpg_data;
+
+#define to_priv(_hw) container_of(_hw, struct cpg_priv, hw)
+
+#define FRQCR_PLL1EN BIT(10)
+static const unsigned int pll1mult[] = { 12, 12, 6, 12, 6, 12, 1};
+
+static unsigned long pll_recalc_rate(struct clk_hw *hw,
+				      unsigned long parent_rate)
+{
+	struct cpg_priv *cpg = to_priv(hw);
+	unsigned long rate = parent_rate;
+	u16 frqcr;
+
+	frqcr = ioread16(cpg->frqcr);
+	if (frqcr & FRQCR_PLL1EN) {
+		rate *= pll1mult[cpg->mode];
+		if (cpg->mode < 6 && (cpg->feat & CPG_DIV1))
+			rate /= 2;
+	}
+	return rate;
+}
+
+static void get_round_rate(struct cpg_priv *cpg,
+			   unsigned long *out, bool *pllen,
+			   unsigned long rate, unsigned long prate)
+{
+	long pllout, res;
+	bool pll;
+
+	if (cpg->mode < 6 && (cpg->feat & CPG_DIV1))
+		prate /= 2;
+
+	pllout = prate * pll1mult[cpg->mode];
+	if (abs(pllout - rate) > abs(prate - rate)) {
+		res = prate;
+		pll = false;
+	} else {
+		res = pllout;
+		pll = true;
+	}
+	if (out)
+		*out = res;
+	if (pllen)
+		*pllen = pll;
+}
+
+static int pll_determine_rate(struct clk_hw *hw, struct clk_rate_request *req)
+{
+	struct cpg_priv *cpg = to_priv(hw);
+
+	get_round_rate(cpg, &req->rate, NULL, req->rate, req->best_parent_rate);
+	return 0;
+}
+
+static int pll_set_rate(struct clk_hw *hw,
+			unsigned long rate, unsigned long prate)
+{
+	struct cpg_priv *cpg = to_priv(hw);
+	bool oldpll, newpll;
+	u16 frqcr;
+
+	frqcr = ioread16(cpg->frqcr);
+	get_round_rate(cpg, NULL, &newpll, rate, prate);
+	oldpll = frqcr & FRQCR_PLL1EN;
+	frqcr &= ~FRQCR_PLL1EN;
+
+	if (newpll) {
+		frqcr |= FRQCR_PLL1EN;
+		if (!oldpll) {
+			/* set PLL wakeup delay time */
+			iowrite16(0xa500, cpg->frqcr + WTCNT);
+			iowrite16(0xa507, cpg->frqcr + WTCNT);
+			iowrite16(0x5a00, cpg->frqcr + WTCSR);
+		}
+	}
+	iowrite16(frqcr, cpg->frqcr);
+
+	/* Test for new PLL state */
+	frqcr = ioread16(cpg->frqcr);
+	oldpll = frqcr & FRQCR_PLL1EN;
+	return !(oldpll == newpll);
+}
+
+static const struct clk_ops pll_ops = {
+	.recalc_rate = pll_recalc_rate,
+	.determine_rate = pll_determine_rate,
+	.set_rate = pll_set_rate,
+};
+
+#define PLLOUT "pllout"
+
+static int register_pll(struct device_node *node, struct cpg_priv *cpg)
+{
+	const char *clk_name = node->name;
+	const char *parent_name;
+	struct clk_init_data init = {
+		.name = PLLOUT,
+		.ops = &pll_ops,
+		.flags = 0,
+		.num_parents = 1,
+	};
+	int ret;
+
+	parent_name = of_clk_get_parent_name(node, 0);
+	init.parent_names = &parent_name;
+	cpg->hw.init = &init;
+
+	ret = of_clk_hw_register(node, &cpg->hw);
+	if (ret < 0)
+		pr_err("%pOF: failed to add provider %s (%d)\n",
+		       node, clk_name, ret);
+	return ret;
+}
+
+static void clkstp00_sw(struct clk_hw *hw, bool on)
+{
+	u32 val;
+	struct clk_gate *gate = to_clk_gate(hw);
+
+	val = BIT(gate->bit_idx);
+	if (on)
+		writel(val, gate->reg + CLKSTPCLR00);
+	else
+		writel(val, gate->reg);
+}
+
+static int clkstp00_enable(struct clk_hw *hw)
+{
+	clkstp00_sw(hw, true);
+	return 0;
+}
+
+static void clkstp00_disable(struct clk_hw *hw)
+{
+	clkstp00_sw(hw, false);
+}
+
+static int clkstp00_is_enabled(struct clk_hw *hw)
+{
+	u8 val;
+	struct clk_gate *gate = to_clk_gate(hw);
+
+	val = readb(gate->reg);
+	val &= 1 << gate->bit_idx;
+	return val == 0;
+}
+
+static const struct clk_ops gate_clkstp00_ops = {
+	.enable = clkstp00_enable,
+	.disable = clkstp00_disable,
+	.is_enabled = clkstp00_is_enabled,
+};
+
+static struct clk_hw *clk_hw_register_clkstp(struct device_node *node,
+					     const char *name,
+					     const char *parent,
+					     void __iomem *reg, int bit,
+					     spinlock_t *lock)
+{
+	struct clk_gate *gate;
+	struct clk_init_data init = {
+		.name = name,
+		.ops = &gate_clkstp00_ops,
+		.flags = 0,
+		.parent_names = &parent,
+		.num_parents = 1,
+	};
+	struct clk_hw *hw;
+	int ret;
+
+	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+	if (gate == NULL)
+		goto error;
+	gate->reg = reg;
+	gate->bit_idx = bit;
+	gate->flags = 0;
+	gate->lock = lock;
+	gate->hw.init = &init;
+	hw = &gate->hw;
+	ret = of_clk_hw_register(node, hw);
+	if (ret < 0)
+		goto error;
+	return hw;
+error:
+	kfree(gate);
+	return ERR_PTR(ret);
+}
+
+#define STBCR_BASE 5
+#define CLKSTP_BASE 2
+static int register_div(struct device_node *node, struct cpg_priv *cpg)
+{
+	static const char * const divout[] = {
+		"fck", "bck", "ick",
+	};
+	static const char * const stbcrout[] = {
+		"sci_clk", "rtc_clk", "tmu012_clk",	/* STBCR */
+		"scif_clk", "dmac_clk",			/* STBCR */
+		"ubc_clk", "sq_clk",			/* STBCR2 */
+	};
+	static const char * const clkstpout[] = {
+		"intc_clk", "tmu34_clk", "pcic_clk",	/* CLKSTP00 */
+	};
+
+	int num_clk = ARRAY_SIZE(divout) + ARRAY_SIZE(stbcrout) + ARRAY_SIZE(clkstpout);
+	struct clk_hw_onecell_data *data;
+	struct clk_hw *reg_hw;
+	unsigned int i, n;
+	int ret;
+
+	data = kzalloc(struct_size(data, hws, num_clk + 1), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	num_clk = 0;
+	for (i = 0; i < ARRAY_SIZE(divout); i++) {
+		reg_hw = __clk_hw_register_divider(NULL, node, divout[i],
+						   PLLOUT, NULL, NULL,
+						   0, cpg->frqcr, i * 3, 3,
+						   CLK_DIVIDER_REG_16BIT,
+						   (i == 0) ? pdiv_table : div_table,
+						   &cpg->clklock);
+		if (IS_ERR(reg_hw)) {
+			ret = PTR_ERR(reg_hw);
+			goto error;
+		}
+		data->hws[num_clk++] = reg_hw;
+	}
+
+	n = (cpg->feat & MSTP_CR2) ? ARRAY_SIZE(stbcrout) : STBCR_BASE;
+	for (i = 0; i < n; i++) {
+		u32 off =  (i < (ARRAY_SIZE(stbcrout) - 2)) ? STBCR : STBCR2;
+
+		reg_hw = __clk_hw_register_gate(NULL, node, stbcrout[i],
+						divout[0], NULL, NULL,
+						0, cpg->frqcr + off, i % STBCR_BASE,
+						CLK_GATE_REG_8BIT | CLK_GATE_SET_TO_DISABLE,
+						&cpg->clklock);
+		if (IS_ERR(reg_hw)) {
+			ret = PTR_ERR(reg_hw);
+			goto error;
+		}
+		data->hws[num_clk++] = reg_hw;
+	}
+
+	if (cpg->feat & MSTP_CLKSTP) {
+		n = (cpg->feat & MSTP_CSTP2) ? ARRAY_SIZE(clkstpout) : CLKSTP_BASE;
+		for (i = 0; i < n; i++) {
+			reg_hw = clk_hw_register_clkstp(node, clkstpout[i],
+							divout[0], cpg->clkstp00,
+							i, &cpg->clklock);
+			if (IS_ERR(reg_hw)) {
+				ret = PTR_ERR(reg_hw);
+				goto error;
+			}
+			data->hws[num_clk++] = reg_hw;
+		}
+	}
+
+	data->num = num_clk;
+	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, data);
+	if (ret < 0)
+		goto error;
+	return 0;
+
+error:
+	pr_err("%pOF: failed to register clock (%d)\n",
+		       node, ret);
+	for (num_clk--; num_clk >= 0; num_clk--)
+		kfree(data->hws[num_clk]);
+	kfree(data);
+	return ret;
+}
+
+#define NR_CLKMODE 7
+static int sh7750_cpg_setup(struct device_node *node, u32 feat)
+{
+	struct cpg_priv *cpg;
+	u32 mode = NR_CLKMODE;
+	int ret = 0;
+
+	cpg_data = NULL;
+
+	of_property_read_u32_index(node, "renesas,mode", 0, &mode);
+	if (mode >= NR_CLKMODE) {
+		pr_err("%s: Invalid clock mode setting (%u)\n",
+		       node->name, mode);
+		return -EINVAL;
+	}
+
+	cpg = kzalloc(sizeof(struct cpg_priv), GFP_KERNEL);
+	if (!cpg)
+		return -ENOMEM;
+
+	cpg->frqcr = of_iomap(node, 0);
+	if (cpg->frqcr == NULL) {
+		pr_err("%pOF: failed to map divide register", node);
+		ret = -ENODEV;
+		goto cpg_free;
+	}
+
+	if (feat & MSTP_CLKSTP) {
+		cpg->clkstp00 = of_iomap(node, 1);
+		if (cpg->clkstp00 == NULL) {
+			pr_err("%pOF: failed to map clkstp00 register", node);
+			ret = -ENODEV;
+			goto unmap_frqcr;
+		}
+	}
+	cpg->feat = feat;
+	cpg->mode = mode;
+
+	ret = register_pll(node, cpg);
+	if (ret < 0)
+		goto unmap_clkstp00;
+
+	ret = register_div(node, cpg);
+	if (ret < 0)
+		goto unmap_clkstp00;
+
+	cpg_data = cpg;
+	return 0;
+
+unmap_clkstp00:
+	iounmap(cpg->clkstp00);
+unmap_frqcr:
+	iounmap(cpg->frqcr);
+cpg_free:
+	kfree(cpg);
+	return ret;
+}
+
+static void __init sh7750_cpg_init(struct device_node *node)
+{
+	sh7750_cpg_setup(node, cpg_feature[CPG_SH7750]);
+}
+
+static void __init sh7750s_cpg_init(struct device_node *node)
+{
+	sh7750_cpg_setup(node, cpg_feature[CPG_SH7750S]);
+}
+
+static void __init sh7750r_cpg_init(struct device_node *node)
+{
+	sh7750_cpg_setup(node, cpg_feature[CPG_SH7750R]);
+}
+
+static void __init sh7751_cpg_init(struct device_node *node)
+{
+	sh7750_cpg_setup(node, cpg_feature[CPG_SH7751]);
+}
+
+static void __init sh7751r_cpg_init(struct device_node *node)
+{
+	sh7750_cpg_setup(node, cpg_feature[CPG_SH7751R]);
+}
+
+CLK_OF_DECLARE_DRIVER(sh7750_cpg, "renesas,sh7750-cpg",
+		      sh7750_cpg_init);
+CLK_OF_DECLARE_DRIVER(sh7750s_cpg, "renesas,sh7750s-cpg",
+		      sh7750s_cpg_init);
+CLK_OF_DECLARE_DRIVER(sh7750r_cpg, "renesas,sh7750r-cpg",
+		      sh7750r_cpg_init);
+CLK_OF_DECLARE_DRIVER(sh7751_cpg, "renesas,sh7751-cpg",
+		      sh7751_cpg_init);
+CLK_OF_DECLARE_DRIVER(sh7751r_cpg, "renesas,sh7751r-cpg",
+		      sh7751r_cpg_init);
+
+static int sh7750_cpg_probe(struct platform_device *pdev)
+{
+	u32 feature;
+
+	if (cpg_data)
+		return 0;
+	feature = *(u32 *)of_device_get_match_data(&pdev->dev);
+	return sh7750_cpg_setup(pdev->dev.of_node, feature);
+}
+
+static const struct of_device_id sh7750_cpg_of_match[] = {
+	{ .compatible = "renesas,sh7750-cpg",
+	  .data = &cpg_feature[CPG_SH7750] },
+	{ .compatible = "renesas,sh7750s-cpg",
+	  .data = &cpg_feature[CPG_SH7750S] },
+	{ .compatible = "renesas,sh7750r-cpg",
+	  .data = &cpg_feature[CPG_SH7750R] },
+	{ .compatible = "renesas,sh7751-cpg",
+	  .data = &cpg_feature[CPG_SH7751] },
+	{ .compatible = "renesas,sh7751r-cpg",
+	  .data = &cpg_feature[CPG_SH7751R] },
+	{ }
+};
+
+static struct platform_driver sh7750_cpg_driver = {
+	.probe  = sh7750_cpg_probe,
+	.driver = {
+		.name = "sh7750-cpg",
+		.of_match_table = sh7750_cpg_of_match,
+	},
+};
+builtin_platform_driver(sh7750_cpg_driver);
-- 
2.39.2

[PATCH v7 16/37] irqchip: Add SH7751 INTC driver

[Yoshinori Sato]

Renesas SH7751 Internal interrupt controller driver.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 drivers/irqchip/Kconfig              |   8 +
 drivers/irqchip/Makefile             |   1 +
 drivers/irqchip/irq-renesas-sh7751.c | 282 +++++++++++++++++++++++++++
 3 files changed, 291 insertions(+)
 create mode 100644 drivers/irqchip/irq-renesas-sh7751.c

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 72c07a12f5e1..33badb5b4f00 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -690,4 +690,12 @@ config SUNPLUS_SP7021_INTC
 	  chained controller, routing all interrupt source in P-Chip to
 	  the primary controller on C-Chip.
 
+config RENESAS_SH7751_INTC
+	bool "Renesas SH7751 Interrupt Controller"
+	depends on SH_DEVICE_TREE || COMPILE_TEST
+	select IRQ_DOMAIN_HIERARCHY
+	help
+	  Support for the Renesas SH7751 On-chip interrupt controller.
+	  And external interrupt encoder for some targets.
+
 endmenu
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index ec4a18380998..51855034a895 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -121,3 +121,4 @@ obj-$(CONFIG_IRQ_IDT3243X)		+= irq-idt3243x.o
 obj-$(CONFIG_APPLE_AIC)			+= irq-apple-aic.o
 obj-$(CONFIG_MCHP_EIC)			+= irq-mchp-eic.o
 obj-$(CONFIG_SUNPLUS_SP7021_INTC)	+= irq-sp7021-intc.o
+obj-$(CONFIG_RENESAS_SH7751_INTC)	+= irq-renesas-sh7751.o
diff --git a/drivers/irqchip/irq-renesas-sh7751.c b/drivers/irqchip/irq-renesas-sh7751.c
new file mode 100644
index 000000000000..91d6dc3ed04c
--- /dev/null
+++ b/drivers/irqchip/irq-renesas-sh7751.c
@@ -0,0 +1,282 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas SH7751 interrupt controller driver
+ *
+ * Copyright 2023 Yoshinori Sato <ysato@users.sourceforge.jp>
+ */
+
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of.h>
+#include <linux/io.h>
+#include <dt-bindings/interrupt-controller/renesas,sh7751-intc.h>
+
+struct ipr {
+	u16 off;
+	u16 idx;
+};
+
+struct sh7751_intc_priv {
+	const struct ipr *iprmap;
+	void __iomem *base;
+	void __iomem *intpri00;
+	bool	     irlm;
+};
+
+enum {
+	R_ICR         = 0x00,
+	R_IPR         = 0x04,
+	R_INTPRI00    = 0x00,
+	R_INTREQ00    = 0x20,
+	R_INTMSK00    = 0x40,
+	R_INTMSKCLR00 = 0x60,
+};
+
+#define ICR_IRLM BIT(7)
+
+/*
+ * SH7751 IRQ mapping
+ *  IRQ16 - 63: Group0 - IPRA to IPRD
+ *   IRQ16 - 31: external IRL input (ICR.IRLM is 0)
+ *  IRQ80 - 92: Group1 - INTPRI00
+ */
+#define IRQ_START	16
+#define MAX_IRL		(IRQ_START + NR_IRL)
+#define GRP0_IRQ_END	63
+#define GRP1_IRQ_START	80
+#define IRQ_END		92
+
+#define NR_IPRMAP0	(GRP0_IRQ_END - IRQ_START + 1)
+#define NR_IPRMAP1	(IRQ_END - GRP1_IRQ_START)
+#define IPR_PRI_MASK	0x000f
+
+#define IPRA			0
+#define IPRB			4
+#define IPRC			8
+#define IPRD			12
+#define INTPRI00		256
+#define IPR_B12			12
+#define IPR_B8			8
+#define IPR_B4			4
+#define IPR_B0			0
+
+/* SH7751 EVT to IPR mapping table */
+static const struct ipr sh7751_iprmap[] = {
+	[evt2irq(0x240)] = {IPRD, IPR_B12},	/* IRL0 (ICR.IRLM=1) */
+	[evt2irq(0x2a0)] = {IPRD, IPR_B8},	/* IRL1 (ICR.IRLM=1) */
+	[evt2irq(0x300)] = {IPRD, IPR_B4},	/* IRL2 (ICR.IRLM=1) */
+	[evt2irq(0x360)] = {IPRD, IPR_B0},	/* IRL3 (ICR.IRLM=1) */
+	[evt2irq(0x400)] = {IPRA, IPR_B12},	/* TMU0 */
+	[evt2irq(0x420)] = {IPRA, IPR_B8},	/* TMU1 */
+	[evt2irq(0x440)] = {IPRA, IPR_B4},	/* TMU2 TNUI */
+	[evt2irq(0x460)] = {IPRA, IPR_B4},	/* TMU2 TICPI */
+	[evt2irq(0x480)] = {IPRA, IPR_B0},	/* RTC ATI */
+	[evt2irq(0x4a0)] = {IPRA, IPR_B0},	/* RTC PRI */
+	[evt2irq(0x4c0)] = {IPRA, IPR_B0},	/* RTC CUI */
+	[evt2irq(0x4e0)] = {IPRB, IPR_B4},	/* SCI ERI */
+	[evt2irq(0x500)] = {IPRB, IPR_B4},	/* SCI RXI */
+	[evt2irq(0x520)] = {IPRB, IPR_B4},	/* SCI TXI */
+	[evt2irq(0x540)] = {IPRB, IPR_B4},	/* SCI TEI */
+	[evt2irq(0x560)] = {IPRB, IPR_B12},	/* WDT */
+	[evt2irq(0x580)] = {IPRB, IPR_B8},	/* REF RCMI */
+	[evt2irq(0x5a0)] = {IPRB, IPR_B4},	/* REF ROVI */
+	[evt2irq(0x600)] = {IPRC, IPR_B0},	/* H-UDI */
+	[evt2irq(0x620)] = {IPRC, IPR_B12},	/* GPIO */
+	[evt2irq(0x640)] = {IPRC, IPR_B8},	/* DMAC DMTE0 */
+	[evt2irq(0x660)] = {IPRC, IPR_B8},	/* DMAC DMTE1 */
+	[evt2irq(0x680)] = {IPRC, IPR_B8},	/* DMAC DMTE2 */
+	[evt2irq(0x6a0)] = {IPRC, IPR_B8},	/* DMAC DMTE3 */
+	[evt2irq(0x6c0)] = {IPRC, IPR_B8},	/* DMAC DMAE */
+	[evt2irq(0x700)] = {IPRC, IPR_B4},	/* SCIF ERI */
+	[evt2irq(0x720)] = {IPRC, IPR_B4},	/* SCIF RXI */
+	[evt2irq(0x740)] = {IPRC, IPR_B4},	/* SCIF BRI */
+	[evt2irq(0x760)] = {IPRC, IPR_B4},	/* SCIF TXI */
+	[evt2irq(0x780)] = {IPRC, IPR_B8},	/* DMAC DMTE4 */
+	[evt2irq(0x7a0)] = {IPRC, IPR_B8},	/* DMAC DMTE5 */
+	[evt2irq(0x7c0)] = {IPRC, IPR_B8},	/* DMAC DMTE6 */
+	[evt2irq(0x7e0)] = {IPRC, IPR_B8},	/* DMAC DMTE7 */
+	[evt2irq(0xa00)] = {INTPRI00, IPR_B0},	/* PCIC PCISERR */
+	[evt2irq(0xa20)] = {INTPRI00, IPR_B4},	/* PCIC PCIDMA3 */
+	[evt2irq(0xa40)] = {INTPRI00, IPR_B4},	/* PCIC PCIDMA2 */
+	[evt2irq(0xa60)] = {INTPRI00, IPR_B4},	/* PCIC PCIDMA1 */
+	[evt2irq(0xa80)] = {INTPRI00, IPR_B4},	/* PCIC PCIDMA0 */
+	[evt2irq(0xaa0)] = {INTPRI00, IPR_B4},	/* PCIC PCIPWON */
+	[evt2irq(0xac0)] = {INTPRI00, IPR_B4},	/* PCIC PCIPWDWN */
+	[evt2irq(0xae0)] = {INTPRI00, IPR_B4},	/* PCIC PCIERR */
+	[evt2irq(0xb00)] = {INTPRI00, IPR_B8},	/* TMU3 */
+	[evt2irq(0xb80)] = {INTPRI00, IPR_B12},	/* TMU4 */
+};
+
+/*
+ * IPR registers have 4bit priority x 4 entry (16bits)
+ */
+static void update_ipr(struct sh7751_intc_priv *priv, unsigned int irq, u16 pri)
+{
+	const struct ipr *ipr = NULL;
+	void __iomem *ipr_base;
+	unsigned int offset;
+	u16 mask;
+
+	ipr = priv->iprmap + irq;
+	if (irq < GRP1_IRQ_START) {
+		/* Group0 */
+		ipr_base = priv->base + R_IPR;
+		offset = ipr->off;
+	} else {
+		/* Group1 */
+		ipr_base = priv->intpri00;
+		offset = ipr->off - INTPRI00;
+	}
+	mask = ~(IPR_PRI_MASK << ipr->idx);
+	pri = (pri & IPR_PRI_MASK) << ipr->idx;
+	mask &= __raw_readw(ipr_base + offset);
+	__raw_writew(mask | pri, ipr_base + offset);
+}
+
+static inline bool is_valid_irq(unsigned int irq)
+{
+	/* IRQ16 - 63 */
+	if (irq >= IRQ_START && irq < IRQ_START + NR_IPRMAP0)
+		return true;
+	/* IRQ80 - 92 */
+	if (irq >= GRP1_IRQ_START && irq <= IRQ_END)
+		return true;
+	return false;
+}
+
+static inline struct sh7751_intc_priv *irq_data_to_priv(struct irq_data *data)
+{
+	return data->domain->host_data;
+}
+
+/* Interrupt unmask priority is 1, mask priority is 0 */
+#define PRI_ENABLE  1
+#define PRI_DISABLE 0
+static void endisable_irq(struct irq_data *data, bool enable)
+{
+	struct sh7751_intc_priv *priv;
+	unsigned int irq;
+
+	priv = irq_data_to_priv(data);
+
+	irq = irqd_to_hwirq(data);
+	if (!is_valid_irq(irq)) {
+		/* IRQ out of range */
+		pr_warn_once("%s: IRQ %u is out of range\n", __FILE__, irq);
+		return;
+	}
+
+	if (irq <= MAX_IRL && !priv->irlm) {
+		/* IRL encoded external interrupt */
+		/* enable and disable from SR.IMASK */
+		update_sr_imask(irq - IRQ_START, enable);
+	} else {
+		/* Internal peripheral interrupt */
+		/* enable and disable from interrupt priority */
+		update_ipr(priv, irq, enable ? PRI_ENABLE : PRI_DISABLE);
+	}
+}
+
+static void sh7751_mask_irq(struct irq_data *data)
+{
+	endisable_irq(data, false);
+}
+
+static void sh7751_unmask_irq(struct irq_data *data)
+{
+	endisable_irq(data, true);
+}
+
+static const struct irq_chip sh7751_irq_chip = {
+	.name		= "SH7751-INTC",
+	.irq_unmask	= sh7751_unmask_irq,
+	.irq_mask	= sh7751_mask_irq,
+};
+
+static int irq_sh7751_map(struct irq_domain *h, unsigned int virq,
+			  irq_hw_number_t hw_irq_num)
+{
+	irq_set_chip_and_handler(virq, &sh7751_irq_chip, handle_level_irq);
+	irq_get_irq_data(virq)->chip_data = h->host_data;
+	irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOPROBE);
+	return 0;
+}
+
+static int irq_sh7751_xlate(struct irq_domain *d, struct device_node *ctrlr,
+			     const u32 *intspec, unsigned int intsize,
+			     unsigned long *out_hwirq, unsigned int *out_type)
+{
+	if (WARN_ON(intsize < 1))
+		return -EINVAL;
+	*out_hwirq = evt2irq(intspec[0]);
+	*out_type = IRQ_TYPE_NONE;
+	return 0;
+}
+
+static const struct irq_domain_ops irq_ops = {
+	.map    = irq_sh7751_map,
+	.xlate  = irq_sh7751_xlate,
+};
+
+static int __init shintc_of_init(struct device_node *intc, struct device_node *parent,
+				 const struct ipr *iprmap)
+{
+	struct sh7751_intc_priv *priv;
+	void __iomem *base, *base2;
+	struct irq_domain *domain;
+	u16 icr;
+	int ret;
+
+	priv = kzalloc(sizeof(struct sh7751_intc_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return -ENOMEM;
+
+	base = of_iomap(intc, 0);
+	base2 = of_iomap(intc, 1);
+	if (!base || !base2) {
+		pr_err("%pOFP: Invalid register definition\n", intc);
+		ret = -EINVAL;
+		goto error;
+	}
+
+	priv->base = base;
+	priv->intpri00 = base2;
+	priv->iprmap = iprmap;
+
+	if (of_property_read_bool(intc, "renesas,irlm")) {
+		priv->irlm = true;
+		icr = __raw_readw(priv->base + R_ICR);
+		icr |= ICR_IRLM;
+		__raw_writew(icr, priv->base + R_ICR);
+	}
+
+	domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, priv);
+	if (domain == NULL) {
+		pr_err("%pOFP: cannot initialize irq domain\n", intc);
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	irq_set_default_host(domain);
+	pr_info("%pOFP: SH7751 Interrupt controller (%s external IRQ)",
+		intc, priv->irlm ? "4 lines" : "15 level");
+	return 0;
+
+error:
+	if (base)
+		iounmap(base);
+	if (base2)
+		iounmap(base);
+	kfree(priv);
+	return ret;
+}
+
+static int __init sh7751_intc_of_init(struct device_node *intc,
+				      struct device_node *parent)
+{
+	return shintc_of_init(intc, parent, sh7751_iprmap);
+}
+
+IRQCHIP_DECLARE(sh_7751_intc, "renesas,sh7751-intc", sh7751_intc_of_init);
-- 
2.39.2

[PATCH v7 17/37] dt-bindings: interrupt-controller: renesas,sh7751-intc: Add json-schema

[Yoshinori Sato]

Renesas SH7751 INTC json-schema.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 .../renesas,sh7751-intc.yaml                  | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.yaml
new file mode 100644
index 000000000000..fb924eff465d
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/renesas,sh7751-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas SH7751 Interrupt Controller
+
+maintainers:
+  - Yoshinori Sato <ysato@users.sourceforge.jp>
+
+properties:
+  compatible:
+    items:
+      - const: renesas,sh7751-intc
+
+  '#interrupt-cells':
+    const: 1
+
+  interrupt-controller: true
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: ICR
+      - const: INTPRI00
+
+  renesas,icr-irlm:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: If true four independent interrupt requests mode (ICR.IRLM is 1).
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - '#interrupt-cells'
+  - interrupt-controller
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/renesas,sh7751-intc.h>
+    shintc: interrupt-controller@ffd00000 {
+            compatible = "renesas,sh7751-intc";
+            reg = <0xffd00000 14>, <0xfe080000 128>;
+            reg-names = "ICR", "INTPRI00";
+            #interrupt-cells = <1>;
+            interrupt-controller;
+    };
+...
-- 
2.39.2

[PATCH v7 18/37] irqchip: SH7751 external interrupt encoder with enable gate.

[Yoshinori Sato]

SH7751 have 15 level external interrupt.
It is typically connected to the CPU through a priority encoder
that can suppress requests.
This driver provides a way to control those hardware with irqchip.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 drivers/irqchip/Kconfig                 |   7 +
 drivers/irqchip/Makefile                |   2 +
 drivers/irqchip/irq-renesas-sh7751irl.c | 221 ++++++++++++++++++++++++
 3 files changed, 230 insertions(+)
 create mode 100644 drivers/irqchip/irq-renesas-sh7751irl.c

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 33badb5b4f00..7670fcd6757d 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -698,4 +698,11 @@ config RENESAS_SH7751_INTC
 	  Support for the Renesas SH7751 On-chip interrupt controller.
 	  And external interrupt encoder for some targets.
 
+config RENESAS_SH7751IRL_INTC
+	bool "Renesas SH7751 based target IRL encoder support."
+	depends on RENESAS_SH7751_INTC
+	help
+	  Support for External Interrupt encoder
+	  on the some Renesas SH7751 based target.
+
 endmenu
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 51855034a895..bc21d65441f2 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -122,3 +122,5 @@ obj-$(CONFIG_APPLE_AIC)			+= irq-apple-aic.o
 obj-$(CONFIG_MCHP_EIC)			+= irq-mchp-eic.o
 obj-$(CONFIG_SUNPLUS_SP7021_INTC)	+= irq-sp7021-intc.o
 obj-$(CONFIG_RENESAS_SH7751_INTC)	+= irq-renesas-sh7751.o
+obj-$(CONFIG_RENESAS_SH7751IRL_INTC)	+= irq-renesas-sh7751irl.o
+
diff --git a/drivers/irqchip/irq-renesas-sh7751irl.c b/drivers/irqchip/irq-renesas-sh7751irl.c
new file mode 100644
index 000000000000..5990f2cd9a3d
--- /dev/null
+++ b/drivers/irqchip/irq-renesas-sh7751irl.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SH7751 based board external interrupt level encoder driver
+ * (Renesas RTS7751R2D / IO DATA DEVICE LANDISK, USL-5P)
+ *
+ * Copyright (C) 2023 Yoshinori Sato
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+
+struct sh7751irl_intc_priv {
+	struct irq_domain *irq_domain;
+	void __iomem	  *base;
+	unsigned int	  width;
+	bool		  invert;
+	u32		  enable_bit[NR_IRL];
+};
+
+static inline unsigned long get_reg(void __iomem *addr, unsigned int w)
+{
+	switch (w) {
+	case 8:
+		return __raw_readb(addr);
+	case 16:
+		return __raw_readw(addr);
+	case 32:
+		return __raw_readl(addr);
+	default:
+		/* The size is checked when reading the properties. */
+		pr_err("%s: Invalid width %d", __FILE__, w);
+		return 0;
+	}
+}
+
+static inline void set_reg(void __iomem *addr, unsigned int w, unsigned long val)
+{
+	switch (w) {
+	case 8:
+		__raw_writeb(val, addr);
+		break;
+	case 16:
+		__raw_writew(val, addr);
+		break;
+	case 32:
+		__raw_writel(val, addr);
+		break;
+	default:
+		pr_err("%s: Invalid width %d", __FILE__, w);
+	}
+}
+
+static inline struct sh7751irl_intc_priv *irq_data_to_priv(struct irq_data *data)
+{
+	return data->domain->host_data;
+}
+
+static void irl_endisable(struct irq_data *data, unsigned int enable)
+{
+	struct sh7751irl_intc_priv *priv;
+	unsigned long val;
+	unsigned int irl;
+
+	priv = irq_data_to_priv(data);
+	irl = irqd_to_hwirq(data) - IRL_BASE_IRQ;
+
+	if (irl < NR_IRL && priv->enable_bit[irl] < priv->width) {
+		if (priv->invert)
+			enable = !enable;
+
+		val = get_reg(priv->base, priv->width);
+		if (enable)
+			set_bit(priv->enable_bit[irl], &val);
+		else
+			clear_bit(priv->enable_bit[irl], &val);
+		set_reg(priv->base, priv->width, val);
+	} else {
+		pr_err("%s: Invalid register define in IRL %u", __FILE__, irl);
+	}
+}
+
+static void sh7751irl_intc_disable_irq(struct irq_data *data)
+{
+	irl_endisable(data, 0);
+}
+
+static void sh7751irl_intc_enable_irq(struct irq_data *data)
+{
+	irl_endisable(data, 1);
+}
+
+static struct irq_chip sh7751irl_intc_chip = {
+	.name		= "SH7751IRL-INTC",
+	.irq_enable	= sh7751irl_intc_enable_irq,
+	.irq_disable	= sh7751irl_intc_disable_irq,
+};
+
+static int sh7751irl_intc_map(struct irq_domain *h, unsigned int virq,
+			       irq_hw_number_t hw_irq_num)
+{
+	irq_set_chip_and_handler(virq, &sh7751irl_intc_chip, handle_level_irq);
+	irq_get_irq_data(virq)->chip_data = h->host_data;
+	irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOPROBE);
+	return 0;
+}
+
+static int sh7751irl_intc_translate(struct irq_domain *domain,
+			       struct irq_fwspec *fwspec, unsigned long *hwirq,
+			       unsigned int *type)
+{
+	if (fwspec->param[0] > NR_IRL)
+		return -EINVAL;
+
+	switch (fwspec->param_count) {
+	case 2:
+		*type = fwspec->param[1];
+		fallthrough;
+	case 1:
+		*hwirq = fwspec->param[0] + IRL_BASE_IRQ;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct irq_domain_ops sh7751irl_intc_domain_ops = {
+	.map = sh7751irl_intc_map,
+	.translate = sh7751irl_intc_translate,
+};
+
+static int __init load_irl_bit(struct device_node *node, struct sh7751irl_intc_priv *priv)
+{
+	struct property *enable_map;
+	const __be32 *p;
+	u32 nr_bits, bit;
+	u32 irl;
+	int ret;
+
+	/* Fill in unused */
+	memset(priv->enable_bit, ~0, sizeof(priv->enable_bit));
+
+	enable_map = of_find_property(node, "renesas,enable-reg", &nr_bits);
+	if (IS_ERR(enable_map))
+		return PTR_ERR(enable_map);
+
+	nr_bits /= sizeof(u32);
+	if (nr_bits > priv->width)
+		return -EINVAL;
+
+	ret = nr_bits;
+	p = NULL;
+	for (bit = nr_bits; bit > 0; bit--) {
+		p = of_prop_next_u32(enable_map, p, &irl);
+		if (p == NULL || irl > NR_IRL)
+			return -EINVAL;
+		if (irl == NR_IRL)
+			/* IRL15 is unassined bit */
+			continue;
+		priv->enable_bit[irl] = bit - 1;
+	}
+	return ret;
+}
+
+static int __init sh7751irl_init(struct device_node *node, struct device_node *parent)
+{
+	struct sh7751irl_intc_priv *priv;
+	struct resource res;
+	struct irq_domain *d;
+	void __iomem *base;
+	int ret = 0;
+
+	if (of_address_to_resource(node, 0, &res))
+		return -EINVAL;
+	if (resource_size(&res) > 4)
+		return -EINVAL;
+
+	base = ioremap(res.start, resource_size(&res));
+	if (!base)
+		return -EINVAL;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base = base;
+	priv->width = 8 << resource_size(&res);
+
+	ret = load_irl_bit(node, priv);
+	if (ret < 0) {
+		pr_err("%pOFP: Invalid register define.\n", node);
+		goto error;
+	}
+
+	d = irq_domain_add_tree(node, &sh7751irl_intc_domain_ops, priv);
+	if (d == NULL) {
+		pr_err("%pOFP: cannot initialize irq domain\n", node);
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	priv->irq_domain = d;
+	irq_domain_update_bus_token(d, DOMAIN_BUS_WIRED);
+	pr_info("%pOFP: SH7751 External Interrupt encoder (input=%d)", node, ret);
+	return 0;
+error:
+	kfree(priv);
+	return ret;
+}
+
+IRQCHIP_DECLARE(renesas_sh7751_irl, "renesas,sh7751-irl-ext", sh7751irl_init);
-- 
2.39.2

[PATCH v7 19/37] dt-bindings: interrupt-controller: renesas,sh7751-irl-ext: Add json-schema

[Yoshinori Sato]

Renesas SH7751 external interrupt encoder json-schema.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 .../renesas,sh7751-irl-ext.yaml               | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-irl-ext.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-irl-ext.yaml b/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-irl-ext.yaml
new file mode 100644
index 000000000000..fc174c0467e7
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-irl-ext.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/renesas,sh7751-irl-ext.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas SH7751 external interrupt encoder with enable regs.
+
+maintainers:
+  - Yoshinori Sato <ysato@users.sourceforge.jp>
+
+description:
+  This is the generally used external interrupt encoder on SH7751 based boards.
+
+properties:
+  compatible:
+    items:
+      - const: renesas,sh7751-irl-ext
+
+  reg: true
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  '#address-cells':
+    const: 0
+
+  renesas,set-to-disable:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: Invert enable registers. Setting the bit to 0 enables interrupts.
+
+  renesas,enable-reg:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: |
+      IRQ enable register bit mapping
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+  - renesas,enable-reg
+
+additionalProperties: false
+
+examples:
+  - |
+    r2dintc: interrupt-controller@a4000000 {
+        compatible = "renesas,sh7751-irl-ext";
+        reg = <0xa4000000 0x02>;
+        interrupt-controller;
+        #address-cells = <0>;
+        #interrupt-cells = <1>;
+        renesas,enable-reg = <12 9 10 3 0 4 1 2 8 5 6 7 15 15 15 11>;
+    };
-- 
2.39.2

[PATCH v7 20/37] serial: sh-sci: fix SH4 OF support.

[Yoshinori Sato]

- fix earlycon name.
- fix earlyprintk hung (NULL pointer reference).
- fix SERIAL_SH_SCI_EARLYCON enablement

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 drivers/tty/serial/Kconfig  | 2 +-
 drivers/tty/serial/sh-sci.c | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index ffcf4882b25f..dfe5fd436816 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -661,7 +661,7 @@ config SERIAL_SH_SCI_EARLYCON
 	depends on SERIAL_SH_SCI=y
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
-	default ARCH_RENESAS
+	default ARCH_RENESAS || SUPERH
 
 config SERIAL_SH_SCI_DMA
 	bool "DMA support" if EXPERT
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index e512eaa57ed5..46466fb5a637 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2717,7 +2717,7 @@ static int sci_remap_port(struct uart_port *port)
 	if (port->membase)
 		return 0;
 
-	if (port->dev->of_node || (port->flags & UPF_IOREMAP)) {
+	if ((port->dev && port->dev->of_node) || (port->flags & UPF_IOREMAP)) {
 		port->membase = ioremap(port->mapbase, sport->reg_size);
 		if (unlikely(!port->membase)) {
 			dev_err(port->dev, "can't remap port#%d\n", port->line);
@@ -3545,8 +3545,8 @@ static int __init hscif_early_console_setup(struct earlycon_device *device,
 
 OF_EARLYCON_DECLARE(sci, "renesas,sci", sci_early_console_setup);
 OF_EARLYCON_DECLARE(scif, "renesas,scif", scif_early_console_setup);
-OF_EARLYCON_DECLARE(scif, "renesas,scif-r7s9210", rzscifa_early_console_setup);
-OF_EARLYCON_DECLARE(scif, "renesas,scif-r9a07g044", rzscifa_early_console_setup);
+OF_EARLYCON_DECLARE(rzscifa, "renesas,scif-r7s9210", rzscifa_early_console_setup);
+OF_EARLYCON_DECLARE(rzscifa, "renesas,scif-r9a07g044", rzscifa_early_console_setup);
 OF_EARLYCON_DECLARE(scifa, "renesas,scifa", scifa_early_console_setup);
 OF_EARLYCON_DECLARE(scifb, "renesas,scifb", scifb_early_console_setup);
 OF_EARLYCON_DECLARE(hscif, "renesas,hscif", hscif_early_console_setup);
-- 
2.39.2

[PATCH v7 21/37] dt-bindings: serial: renesas,scif: Add scif-sh7751.

[Yoshinori Sato]

Add Renesas SH7751 SCIF.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 Documentation/devicetree/bindings/serial/renesas,scif.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/serial/renesas,scif.yaml b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
index 4610a5bd580c..590f88e2ced9 100644
--- a/Documentation/devicetree/bindings/serial/renesas,scif.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
@@ -18,6 +18,7 @@ properties:
       - items:
           - enum:
               - renesas,scif-r7s72100     # RZ/A1H
+              - renesas,scif-sh7751       # SH7751
           - const: renesas,scif           # generic SCIF compatible UART
 
       - items:
-- 
2.39.2

[PATCH v7 22/37] dt-bindings: display: smi,sm501: SMI SM501 binding json-schema

[Yoshinori Sato]

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 .../bindings/display/smi,sm501.yaml           | 398 ++++++++++++++++++
 1 file changed, 398 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/smi,sm501.yaml

diff --git a/Documentation/devicetree/bindings/display/smi,sm501.yaml b/Documentation/devicetree/bindings/display/smi,sm501.yaml
new file mode 100644
index 000000000000..06c6af4fa4a9
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/smi,sm501.yaml
@@ -0,0 +1,398 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/smi,sm501.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Silicon Motion SM501 Mobile Multimedia Companion Chip
+
+maintainers:
+  - Yoshinori Sato <ysato@user.sourceforge.jp>
+
+description: |
+  These DT bindings describe the SM501.
+
+properties:
+  compatible:
+    const:
+      smi,sm501
+
+  reg:
+    maxItems: 2
+    description: |
+     First entry: System Configuration register
+     Second entry: IO space (Display Controller register)
+
+  interrupts:
+    description: SM501 interrupt to the cpu should be described here.
+
+  mode:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: select a video mode
+
+  edid:
+    description: |
+      verbatim EDID data block describing attached display.
+      Data from the detailed timing descriptor will be used to
+      program the display controller.
+
+  little-endian:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: available on big endian systems, to set different foreign endian.
+  big-endian:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: available on little endian systems, to set different foreign endian.
+
+  swap-fb-endian:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: swap framebuffer byteorder.
+
+  route-crt-panel:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: Panel output merge to CRT.
+
+  crt:
+    type: object
+    description: CRT output control
+    properties:
+      edid:
+        $ref: /schemas/types.yaml#/definitions/uint8-array
+        description: |
+          verbatim EDID data block describing attached display.
+          Data from the detailed timing descriptor will be used to
+          program the display controller.
+
+      smi,flags:
+        $ref: /schemas/types.yaml#/definitions/string-array
+        description: Display control flags.
+        items:
+          anyOf:
+            - const: use-init-done
+            - const: disable-at-exit
+            - const: use-hwcursor
+            - const: use-hwaccel
+            - const: panel-no-fpen
+            - const: panel-no-vbiasen
+            - const: panel-inv-fpen
+            - const: panel-inv-vbiasen
+        maxItems: 8
+
+      bpp:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Color depth
+
+  panel:
+    type: object
+    description: Panel output control
+    properties:
+      edid:
+        $ref: /schemas/types.yaml#/definitions/uint8-array
+        description: |
+          verbatim EDID data block describing attached display.
+          Data from the detailed timing descriptor will be used to
+          program the display controller.
+
+      smi,flags:
+        $ref: /schemas/types.yaml#/definitions/string-array
+        description: Display control flags.
+        items:
+          anyOf:
+            - const: use-init-done
+            - const: disable-at-exit
+            - const: use-hwcursor
+            - const: use-hwaccel
+            - const: panel-no-fpen
+            - const: panel-no-vbiasen
+            - const: panel-inv-fpen
+            - const: panel-inv-vbiasen
+        maxItems: 8
+
+      bpp:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Color depth
+
+  smi,devices:
+    $ref: /schemas/types.yaml#/definitions/string-array
+    description: Select SM501 device functions.
+    items:
+      anyOf:
+        - const: usb-host
+        - const: usb-slave
+        - const: ssp0
+        - const: ssp1
+        - const: uart0
+        - const: uart1
+        - const: fbaccel
+        - const: ac97
+        - const: i2s
+        - const: gpio
+    minItems: 1
+    maxItems: 10
+
+  smi,mclk:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: mclk frequency.
+
+  smi,m1xclk:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: m1xclk frequency.
+
+  misc-timing:
+    type: object
+    description: Miscellaneous Timing register values.
+    properties:
+      ex:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Extend bus holding time.
+
+      xc:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Xscale clock input select.
+
+      usb-over-current-detect-disable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB host current detection disable (Us=0).
+
+      usb-over-current-detect-enable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB host current detection disable (Us=1).
+
+      sdram-clock-mode1-288mhz:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SSM1 bit is clear.
+
+      sdram-clock-mode1-div:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SSM1 bit is set.
+
+      sm1:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SDRAM clock divider for PW mode 1.
+
+      sdram-clock-mode0-288mhz:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SSM0 bit is clear.
+
+      sdram-clock-mode0-div:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SSM0 bit is set.
+
+      sm0:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: SDRAM clock divider for PW mode 0.
+
+      pll-debug-input:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: 96MHz PLL debug input reference frequency (Deb=0).
+
+      pll-debug-output:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: 96MHz PLL debug output frequency (Deb=1).
+
+      no-acpi-control:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: No ACPI control (A=0).
+
+      acpi-control:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: No ACPI control (A=1).
+
+      divider:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Second PLL output frequency.
+
+      usb-host-normal:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB Host normal mode.
+
+      usb-host-simulation:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB Host simulation mode.
+
+      delay:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Delay time to latch read data. Set the value to 10x.
+
+  misc-control:
+    type: object
+    description: Miscellaneous Control register values.
+    properties:
+      pad:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: PCI Pad drive strength.
+
+      usbclk:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: USB Clcok Select.
+
+      uart1:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: UART1 (SSP=0)
+
+      ssp1:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SSP1 (SSP=1)
+
+      latch-address-disable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: 8051 Latch disable (Lat=0).
+
+      latch-address-enable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: 8051 Latch enable (Lat=1).
+
+      panel-data-18bit:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: Flat Panel data 18bit (FP=0).
+
+      panel-data-24bit:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: Flat Panel data 24bit (FP=1).
+
+      xtal-freq-24mhz:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: Crystal frequency 24MHz (Freq=0).
+
+      xtal-freq-12mhz:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: Crystal frequency 12MHz (Freq=1).
+
+      refresh:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Internal memory refresh timing.
+
+      hold:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: BUS Hold time.
+
+      sh-ready-low:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SuperH ready polarity active low (SH=0).
+
+      sh-ready-high:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: SuperH ready polarity active high (SH=1).
+
+      interrupt-normal:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: Interrupt normal (II=0).
+
+      interrupt-inverted:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: Interrupt Inverting (II=1).
+
+      pll-clock-count-disable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: PLL clock count disable.
+
+      pll-clock-count-enaable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: PLL clock count enable.
+
+      dac-power-enable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: DAC Power enable (DAC=0).
+
+      dac-power-disable:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: DAC Power disable (DAC=1).
+
+      usb-slave-cpu:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB slave controller cpu (MC=0).
+
+      usb-slave-8051:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB slave controller 8051MCU (MC=1).
+
+      burst-length-8:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: CPU Master burst length 8 (BL=0).
+
+      burst-length-1:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: CPU Master burst length 1 (BL=1).
+
+      usb-port-master:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB port master.
+
+      usb-port-slave:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: USB port slave.
+
+      vr-mmio-30mb:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: NEC VR Memory map MMIO locatedat 30MB (VR=0)
+
+      vr-mmio-62mb:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: NEC VR Memory map MMIO locatedat 62MB (VR=1)
+
+  gpio-pin-control:
+    type: object
+    description: GPIO control configuration.
+    properties:
+      pin:
+        type: object
+        properties:
+          gpio:
+            $ref: /schemas/types.yaml#/definitions/flag
+            description: pin in/out use GPIO.
+          function:
+            $ref: /schemas/types.yaml#/definitions/flag
+            description: pin in/out use function.
+
+  gpio-i2c:
+    type: object
+    description: GPIO I2C definition.
+    properties:
+      i2c:
+        type: object
+        properties:
+          bus:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            description: I2C bus number.
+
+          sda:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            description: I2C SDA pin port number.
+
+          scl:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            description: I2C SCL pin port number.
+
+          delay:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            description: bit transmission delay.
+
+          timeout:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            description: transmission timeout.
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+
+examples:
+  # MPC5200
+  - |
+    display@1,0 {
+        compatible = "smi,sm501";
+        reg = <0x00000000 0x00800000
+               0x03e00000 0x00200000>;
+        interrupts = <1 1 3>;
+        mode = "640x480-32@60";
+        edid = [00 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00
+                00 00 01 04 00 00 00 00 00 00 00 00 00 00 00 00
+                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+                00 00 00 00 00 00 f0 0a 80 fb 20 e0 25 10 32 60
+                02 00 00 00 00 00 00 06 00 00 00 00 00 00 00 00
+                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 bd];
+    };
-- 
2.39.2

[PATCH v7 23/37] dt-bindings: display: sm501 register definition helper

[Yoshinori Sato]

Miscellaneous Timing and Miscellaneous Control registers definition.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 include/dt-bindings/display/sm501.h | 76 +++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 include/dt-bindings/display/sm501.h

diff --git a/include/dt-bindings/display/sm501.h b/include/dt-bindings/display/sm501.h
new file mode 100644
index 000000000000..a6c6943642e4
--- /dev/null
+++ b/include/dt-bindings/display/sm501.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+#ifndef __DT_BINDING_DISPALY_SM501__
+#define __DT_BINDING_DISPALY_SM501__
+
+/* Miscellaneous Conntrol */
+#define SM501_MISC_CONTROL_PAD_24	0
+#define SM501_MISC_CONTROL_PAD_12	1
+#define SM501_MISC_CONTROL_PAD_8	2
+
+#define SM501_MISC_CONTROL_USBCLK_XTAL	0
+#define SM501_MISC_CONTROL_USBCLK_96MHZ	1
+#define SM501_MISC_CONTROL_USBCLK_48MHZ	2
+
+#define SM501_MISC_CONTROL_RFSH_8US	0
+#define SM501_MISC_CONTROL_RFSH_16US	1
+#define SM501_MISC_CONTROL_RFSH_32US	2
+#define SM501_MISC_CONTROL_RFSH_64US	3
+
+#define SM501_MISC_CONTROL_HOLD_EMPTY	0
+#define SM501_MISC_CONTROL_HOLD_8TR	1
+#define SM501_MISC_CONTROL_HOLD_16TR	2
+#define SM501_MISC_CONTROL_HOLD_24TR	3
+#define SM501_MISC_CONTROL_HOLD_32TR	4
+
+/* Miscellaneous timing */
+#define SM501_MISC_TIMING_EX_HOLD_0	0
+#define SM501_MISC_TIMING_EX_HOLD_16	1
+#define SM501_MISC_TIMING_EX_HOLD_32	2
+#define SM501_MISC_TIMING_EX_HOLD_48	3
+#define SM501_MISC_TIMING_EX_HOLD_64	4
+#define SM501_MISC_TIMING_EX_HOLD_80	5
+#define SM501_MISC_TIMING_EX_HOLD_96	6
+#define SM501_MISC_TIMING_EX_HOLD_112	7
+#define SM501_MISC_TIMING_EX_HOLD_128	8
+#define SM501_MISC_TIMING_EX_HOLD_144	9
+#define SM501_MISC_TIMING_EX_HOLD_160	10
+#define SM501_MISC_TIMING_EX_HOLD_176	11
+#define SM501_MISC_TIMING_EX_HOLD_192	12
+#define SM501_MISC_TIMING_EX_HOLD_208	13
+#define SM501_MISC_TIMING_EX_HOLD_224	14
+#define SM501_MISC_TIMING_EX_HOLD_240	15
+
+#define SM501_MISC_TIMING_XC_INTERNAL	0
+#define SM501_MISC_TIMING_XC_HCLK	1
+#define SM501_MISC_TIMING_XC_GPIO	2
+
+#define SM501_MISC_TIMING_SM_DIV1	0
+#define SM501_MISC_TIMING_SM_DIV2	1
+#define SM501_MISC_TIMING_SM_DIV4	2
+#define SM501_MISC_TIMING_SM_DIV8	3
+#define SM501_MISC_TIMING_SM_DIV16	4
+#define SM501_MISC_TIMING_SM_DIV32	5
+#define SM501_MISC_TIMING_SM_DIV64	6
+#define SM501_MISC_TIMING_SM_DIV128	7
+#define SM501_MISC_TIMING_SM_DIV3	8
+#define SM501_MISC_TIMING_SM_DIV6	9
+#define SM501_MISC_TIMING_SM_DIV12	10
+#define SM501_MISC_TIMING_SM_DIV24	11
+#define SM501_MISC_TIMING_SM_DIV48	12
+#define SM501_MISC_TIMING_SM_DIV96	13
+#define SM501_MISC_TIMING_SM_DIV192	14
+#define SM501_MISC_TIMING_SM_DIV384	15
+
+#define SM501_MISC_TIMING_DIV336MHZ	0
+#define SM501_MISC_TIMING_DIV288MHZ	1
+#define SM501_MISC_TIMING_DIV240MHZ	2
+#define SM501_MISC_TIMING_DIV192MHZ	3
+
+#define SM501_MISC_TIMING_DELAY_NONE	0
+#define SM501_MISC_TIMING_DELAY_0_5	1
+#define SM501_MISC_TIMING_DELAY_1_0	2
+#define SM501_MISC_TIMING_DELAY_1_5	3
+#define SM501_MISC_TIMING_DELAY_2_0	4
+#define SM501_MISC_TIMING_DELAY_2_5	5
+
+#endif
-- 
2.39.2

[RESEND v7 00/37] Device Tree support for SH7751 based board

[Yoshinori Sato]

Sorry. previus mail is thread broken.

This is an updated version of something I wrote about 7 years ago.
Minimum support for R2D-plus and LANDISK.
I think R2D-1 will work if you add AX88796 to dts.
And board-specific functions and SCI's SPI functions are not supported.

You can get it working with qemu found here.
https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk

v7 changes.
- sh/kernel/setup.c: fix kernel parameter handling.
- clk-sh7750.c: cleanup.
- sh_tmu.c: cleanup.
- irq-renesas-sh7751.c: IPR definition move to code.
- irq-renesas-sh7751irl.c: update register definition.
- pci-sh7751.c: Register initialization fix. 
- sm501 and sm501fb: Re-design Device Tree properties.

v6 changes.
- pci-sh7751: merge register define.
- pci-sh7751: use 'dma-ranges' property.
- pci-sh7751: rename general PCI properties.
- sm501 and sm501fb: Re-design Device Tree properties.
- sh/kernel/setup: cleanup command line setup.
- irq-sh7751.c: some cleanup.

v5 changes.
- pci-sh7751: revert header changes. and some fix in previuous driver.
- sh/kernel/iomap.c: Use SH io functions.
- sm501 and sm501fb: re-write DT support.

v4 changes.
- cpg-sh7750: use clk-divider and clk-gate.
- pci-sh7751: unified header files to old PCI driver.
- irq-renesas-sh7751: IPR registers direct mapping.
- irq-renesas-sh7751irl: useful register bit mapping.
- sm501 and sm501fb: re-write dt parser.
- j2_minus: fix build error.
- dt-binding schema: fix some errors.
- *.dts: cleanup.

v3 changes.
- Rewrite clk drivers.
- Added sh_tmu to OF support.
- Cleanup PCI stuff.
- Update sm501 and sm501fb OF support.
- Update devicetree and documents.

v2 changes.
- Rebasing v6,6-rc1
- re-write irqchip driver.
- Add binding documents.
- Cleanup review comment.

Yoshinori Sato (37):
  sh: passing FDT address to kernel startup.
  sh: Kconfig unified OF supported targets.
  sh: Enable OF support for build and configuration.
  dt-bindings: interrupt-controller: Add header for Renesas SH3/4 INTC.
  sh: GENERIC_IRQ_CHIP support for CONFIG_OF=y
  sh: kernel/setup Update DT support.
  sh: Fix COMMON_CLK support in CONFIG_OF=y.
  clocksource: sh_tmu: CLOCKSOURCE support.
  dt-binding: Add compatible SH7750 SoC
  sh: Common PCI Framework driver support.
  pci: pci-sh7751: Add SH7751 PCI driver
  dt-bindings: pci: pci-sh7751: Add SH7751 PCI
  dt-bindings: clock: sh7750-cpg: Add renesas,sh7750-cpg header.
  clk: Compatible with narrow registers
  clk: renesas: Add SH7750/7751 CPG Driver
  irqchip: Add SH7751 INTC driver
  dt-bindings: interrupt-controller: renesas,sh7751-intc: Add
    json-schema
  irqchip: SH7751 external interrupt encoder with enable gate.
  dt-bindings: interrupt-controller: renesas,sh7751-irl-ext: Add
    json-schema
  serial: sh-sci: fix SH4 OF support.
  dt-bindings: serial: renesas,scif: Add scif-sh7751.
  dt-bindings: display: smi,sm501: SMI SM501 binding json-schema
  dt-bindings: display: sm501 register definition helper
  mfd: sm501: Convert platform_data to OF property
  dt-binding: sh: cpus: Add SH CPUs json-schema
  dt-bindings: vendor-prefixes: Add iodata
  dt-bindings: ata: ata-generic: Add new targets
  dt-bindings: soc: renesas: sh: Add SH7751 based target
  sh: SH7751R SoC Internal peripheral definition dtsi.
  sh: add RTS7751R2D Plus DTS
  sh: Add IO DATA LANDISK dts
  sh: Add IO DATA USL-5P dts
  sh: j2_mimas_v2.dts update
  sh: Add dtbs target support.
  sh: RTS7751R2D Plus OF defconfig
  sh: LANDISK OF defconfig
  sh: j2_defconfig: update

 .../devicetree/bindings/ata/ata-generic.yaml  |   2 +
 .../bindings/clock/renesas,sh7750-cpg.yaml    | 105 ++++
 .../bindings/display/smi,sm501.yaml           | 398 +++++++++++++++
 .../renesas,sh7751-intc.yaml                  |  53 ++
 .../renesas,sh7751-irl-ext.yaml               |  57 +++
 .../bindings/pci/renesas,sh7751-pci.yaml      |  89 ++++
 .../bindings/serial/renesas,scif.yaml         |   1 +
 .../devicetree/bindings/sh/cpus.yaml          |  63 +++
 .../devicetree/bindings/soc/renesas/sh.yaml   |  27 +
 .../bindings/timer/renesas,tmu.yaml           |   2 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/sh/Kconfig                               |  33 +-
 arch/sh/boards/Kconfig                        |  23 +-
 arch/sh/boards/of-generic.c                   |  28 +-
 arch/sh/boot/compressed/head_32.S             |   5 +-
 arch/sh/boot/dts/Makefile                     |   5 +
 arch/sh/boot/dts/j2_mimas_v2.dts              |   2 +-
 arch/sh/boot/dts/landisk.dts                  |  77 +++
 arch/sh/boot/dts/rts7751r2dplus.dts           | 169 ++++++
 arch/sh/boot/dts/sh7751r.dtsi                 | 105 ++++
 arch/sh/boot/dts/usl-5p.dts                   |  85 ++++
 arch/sh/configs/j2_defconfig                  |  11 +-
 arch/sh/configs/landisk-of_defconfig          | 104 ++++
 arch/sh/configs/rts7751r2dplus-of_defconfig   |  75 +++
 arch/sh/drivers/Makefile                      |   2 +
 arch/sh/include/asm/io.h                      |   8 +
 arch/sh/include/asm/irq.h                     |  10 +-
 arch/sh/include/asm/pci.h                     |   4 +
 arch/sh/include/asm/setup.h                   |   1 +
 arch/sh/kernel/cpu/Makefile                   |   6 +-
 arch/sh/kernel/cpu/irq/imask.c                |  17 +
 arch/sh/kernel/cpu/sh4/Makefile               |   3 +
 arch/sh/kernel/iomap.c                        |  18 +
 arch/sh/kernel/setup.c                        |  36 +-
 arch/sh/kernel/time.c                         |  12 +
 drivers/clk/clk-divider.c                     |  56 +-
 drivers/clk/clk-gate.c                        |  62 ++-
 drivers/clk/renesas/Kconfig                   |  13 +-
 drivers/clk/renesas/Makefile                  |   1 +
 drivers/clk/renesas/clk-sh7750.c              | 480 ++++++++++++++++++
 drivers/clocksource/sh_tmu.c                  | 198 +++++---
 drivers/irqchip/Kconfig                       |  15 +
 drivers/irqchip/Makefile                      |   3 +
 drivers/irqchip/irq-renesas-sh7751.c          | 282 ++++++++++
 drivers/irqchip/irq-renesas-sh7751irl.c       | 221 ++++++++
 drivers/mfd/sm501.c                           | 315 ++++++++++++
 drivers/pci/controller/Kconfig                |   9 +
 drivers/pci/controller/Makefile               |   1 +
 drivers/pci/controller/pci-sh7751.c           | 342 +++++++++++++
 drivers/tty/serial/Kconfig                    |   2 +-
 drivers/tty/serial/sh-sci.c                   |   6 +-
 drivers/video/fbdev/sm501fb.c                 | 106 ++++
 include/dt-bindings/clock/sh7750-cpg.h        |  26 +
 include/dt-bindings/display/sm501.h           |  76 +++
 .../renesas,sh7751-intc.h                     |  19 +
 include/linux/clk-provider.h                  |  22 +-
 include/linux/sh_intc.h                       |   7 +-
 57 files changed, 3713 insertions(+), 187 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/renesas,sh7750-cpg.yaml
 create mode 100644 Documentation/devicetree/bindings/display/smi,sm501.yaml
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.yaml
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-irl-ext.yaml
 create mode 100644 Documentation/devicetree/bindings/pci/renesas,sh7751-pci.yaml
 create mode 100644 Documentation/devicetree/bindings/sh/cpus.yaml
 create mode 100644 Documentation/devicetree/bindings/soc/renesas/sh.yaml
 create mode 100644 arch/sh/boot/dts/landisk.dts
 create mode 100644 arch/sh/boot/dts/rts7751r2dplus.dts
 create mode 100644 arch/sh/boot/dts/sh7751r.dtsi
 create mode 100644 arch/sh/boot/dts/usl-5p.dts
 create mode 100644 arch/sh/configs/landisk-of_defconfig
 create mode 100644 arch/sh/configs/rts7751r2dplus-of_defconfig
 create mode 100644 drivers/clk/renesas/clk-sh7750.c
 create mode 100644 drivers/irqchip/irq-renesas-sh7751.c
 create mode 100644 drivers/irqchip/irq-renesas-sh7751irl.c
 create mode 100644 drivers/pci/controller/pci-sh7751.c
 create mode 100644 include/dt-bindings/clock/sh7750-cpg.h
 create mode 100644 include/dt-bindings/display/sm501.h
 create mode 100644 include/dt-bindings/interrupt-controller/renesas,sh7751-intc.h

-- 
2.39.2

Re: [PATCH v7 04/37] dt-bindings: interrupt-controller: Add header for Renesas SH3/4 INTC.

[Krzysztof Kozlowski]

On 04/04/2024 06:59, Yoshinori Sato wrote:
> Renesas SH7751 Interrupt controller priority register define.
> 
> Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

Nothing improved, still NAK.

This is a friendly reminder during the review process.

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

Thank you.

Best regards,
Krzysztof

Re: [PATCH v7 00/37] Device Tree support for SH7751 based board

[Niklas Cassel]

On Thu, Apr 04, 2024 at 01:59:25PM +0900, Yoshinori Sato wrote:
> This is an updated version of something I wrote about 7 years ago.
> Minimum support for R2D-plus and LANDISK.
> I think R2D-1 will work if you add AX88796 to dts.
> And board-specific functions and SCI's SPI functions are not supported.
> 
> You can get it working with qemu found here.
> https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk

Why send this as one huge series?

These are the mailing lists that you have on CC:
linux-ide, devicetree, linux-kernel,
linux-renesas-soc, linux-clk, dri-devel,
linux-pci, linux-serial, linux-fbdev

I really think that you will be able to get all these changes accepted much
faster if you split this series in to one series per subsystem/mailing list.


Kind regards,
Niklas

Re: [PATCH v7 00/37] Device Tree support for SH7751 based board

[Bjorn Helgaas]

On Thu, Apr 04, 2024 at 01:59:25PM +0900, Yoshinori Sato wrote:
> This is an updated version of something I wrote about 7 years ago.
> Minimum support for R2D-plus and LANDISK.
> I think R2D-1 will work if you add AX88796 to dts.
> And board-specific functions and SCI's SPI functions are not supported.

My comments/questions from
https://lore.kernel.org/r/20231120181600.GA205977@bhelgaas
https://lore.kernel.org/r/20231016172742.GA1215127@bhelgaas
still apply.

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[Rob Landley]

On 4/4/24 00:14, Yoshinori Sato wrote:
> Sorry. previus mail is thread broken.
> 
> This is an updated version of something I wrote about 7 years ago.
> Minimum support for R2D-plus and LANDISK.
> I think R2D-1 will work if you add AX88796 to dts.
> And board-specific functions and SCI's SPI functions are not supported.
> 
> You can get it working with qemu found here.
> https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk

I was hoping to get a device tree kernel to boot with static device tree on the
existing linux-sh qemu. (The main new features I want from an updated sh4 qemu
are a working battery backed up clock and more physical memory...)

Is there somewhere I can get the kernel patch list in git or something? I
haven't got tooling set up to conveniently fish 37 patches out of an mbox file,
and would like to test this. (I moved last month and my physical sh7751 hardware
is in a storage container.)

Thanks,

Rob

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[Geert Uytterhoeven]

Hi Rob,

On Fri, Apr 5, 2024 at 2:09 PM Rob Landley <rob@landley.net> wrote:
> On 4/4/24 00:14, Yoshinori Sato wrote:
> > This is an updated version of something I wrote about 7 years ago.
> > Minimum support for R2D-plus and LANDISK.
> > I think R2D-1 will work if you add AX88796 to dts.
> > And board-specific functions and SCI's SPI functions are not supported.
> >
> > You can get it working with qemu found here.
> > https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk
>
> I was hoping to get a device tree kernel to boot with static device tree on the
> existing linux-sh qemu. (The main new features I want from an updated sh4 qemu
> are a working battery backed up clock and more physical memory...)
>
> Is there somewhere I can get the kernel patch list in git or something? I
> haven't got tooling set up to conveniently fish 37 patches out of an mbox file,
> and would like to test this. (I moved last month and my physical sh7751 hardware
> is in a storage container.)

b4 am fe69e328ec617f91a09fa2d00506ba1a664085d8.1712207606.git.ysato@users.sourceforge.jp
git am ./v7_20240404_ysato_sh_passing_fdt_address_to_kernel_startup.mbx

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[Rob Landley]

On 4/5/24 07:21, Geert Uytterhoeven wrote:
> Hi Rob,
> 
> On Fri, Apr 5, 2024 at 2:09 PM Rob Landley <rob@landley.net> wrote:
>> On 4/4/24 00:14, Yoshinori Sato wrote:
>> > This is an updated version of something I wrote about 7 years ago.
>> > Minimum support for R2D-plus and LANDISK.
>> > I think R2D-1 will work if you add AX88796 to dts.
>> > And board-specific functions and SCI's SPI functions are not supported.
>> >
>> > You can get it working with qemu found here.
>> > https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk
>>
>> I was hoping to get a device tree kernel to boot with static device tree on the
>> existing linux-sh qemu. (The main new features I want from an updated sh4 qemu
>> are a working battery backed up clock and more physical memory...)
>>
>> Is there somewhere I can get the kernel patch list in git or something? I
>> haven't got tooling set up to conveniently fish 37 patches out of an mbox file,
>> and would like to test this. (I moved last month and my physical sh7751 hardware
>> is in a storage container.)
> 
> b4 am fe69e328ec617f91a09fa2d00506ba1a664085d8.1712207606.git.ysato@users.sourceforge.jp
> git am ./v7_20240404_ysato_sh_passing_fdt_address_to_kernel_startup.mbx

$ b4
bash: b4: command not found
$ aptitude show b4
E: Unable to locate package b4
$ aptitude search b4
p   b43-fwcutter                    - utility for extracting Broadcom 43xx firmw
...


Let's see, google says it's a random python3 tool, probably wants a newer
python3 version than I've got because everything that uses python3 does, it says
"you can run it directly from the git repository"...

$ ./b4.sh
Traceback (most recent call last):
  File "/home/landley/b4/src/b4/command.py", line 10, in <module>
    import b4
  File "/home/landley/b4/src/b4/__init__.py", line 37, in <module>
    from typing import Optional, Tuple, Set, List, BinaryIO, Union, Sequence,
Literal, Iterator, Dict
ImportError: cannot import name 'Literal' from 'typing'
(/usr/lib/python3.7/typing.py)

Oh well. Good luck with your patches, hope it works out.

Rob

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[John Paul Adrian Glaubitz]

On Fri, 2024-04-05 at 07:17 -0500, Rob Landley wrote:
> Is there somewhere I can get the kernel patch list in git or something? I
> haven't got tooling set up to conveniently fish 37 patches out of an mbox file,
> and would like to test this. (I moved last month and my physical sh7751 hardware
> is in a storage container.)

Try the tool "b4" which allows you to download the patch set as an mbox file.

The mbox file can be applied with "git am <mbox file>".

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[John Paul Adrian Glaubitz]

On Fri, 2024-04-05 at 13:57 -0500, Rob Landley wrote:
> $ b4
> bash: b4: command not found
> $ aptitude show b4
> E: Unable to locate package b4
> $ aptitude search b4
> p   b43-fwcutter                    - utility for extracting Broadcom 43xx firmw
> ...

glaubitz@z6:~> dpkg -S `which b4`
b4: /usr/bin/b4
glaubitz@z6:~> apt show b4
Package: b4
Version: 0.12.0-2
Priority: optional
Section: python
Maintainer: Héctor Orón Martínez <zumbi@debian.org>
Installed-Size: 373 kB
Depends: python3-dkim (>= 1.0.5), python3-dnspython (>= 2.1.0), python3-requests (>= 2.24.0), python3-patatt (>= 0.6.3), git-filter-repo (>= 2.30), python3:any
Homepage: https://git.kernel.org/pub/scm/utils/b4/b4.git
Download-Size: 76.6 kB
APT-Manual-Installed: yes
APT-Sources: http://ftp.debian.org/debian bookworm/main amd64 Packages
Description: helper utility to work with patches made available via a public-inbox archive
 This is a helper utility to work with patches made available via a
 public-inbox archive like lore.kernel.org. It is written to make it
 easier to participate in a patch-based workflows, like those used in
 the Linux kernel development.
 .
 This package installs the application and library for Python 3.

glaubitz@z6:~>

Alternatively, install it via pip:

glaubitz@z6:~> pip install --user --break-system-packages b4

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[Geert Uytterhoeven]

Hi Rob,

On Fri, Apr 5, 2024 at 8:48 PM Rob Landley <rob@landley.net> wrote:
> On 4/5/24 07:21, Geert Uytterhoeven wrote:
> > On Fri, Apr 5, 2024 at 2:09 PM Rob Landley <rob@landley.net> wrote:
> >> On 4/4/24 00:14, Yoshinori Sato wrote:
> >> > This is an updated version of something I wrote about 7 years ago.
> >> > Minimum support for R2D-plus and LANDISK.
> >> > I think R2D-1 will work if you add AX88796 to dts.
> >> > And board-specific functions and SCI's SPI functions are not supported.
> >> >
> >> > You can get it working with qemu found here.
> >> > https://gitlab.com/yoshinori.sato/qemu/-/tree/landisk
> >>
> >> I was hoping to get a device tree kernel to boot with static device tree on the
> >> existing linux-sh qemu. (The main new features I want from an updated sh4 qemu
> >> are a working battery backed up clock and more physical memory...)
> >>
> >> Is there somewhere I can get the kernel patch list in git or something? I
> >> haven't got tooling set up to conveniently fish 37 patches out of an mbox file,
> >> and would like to test this. (I moved last month and my physical sh7751 hardware
> >> is in a storage container.)
> >
> > b4 am fe69e328ec617f91a09fa2d00506ba1a664085d8.1712207606.git.ysato@users.sourceforge.jp
> > git am ./v7_20240404_ysato_sh_passing_fdt_address_to_kernel_startup.mbx
>
> $ b4
> bash: b4: command not found

[...]

> Oh well. Good luck with your patches, hope it works out.

If you cannot/do not want to install b4, you can stick the Message-Id
into lore, and download the mbox from
https://lore.kernel.org/all/fe69e328ec617f91a09fa2d00506ba1a664085d8.1712207606.git.ysato@users.sourceforge.jp

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [RESEND v7 00/37] Device Tree support for SH7751 based board

[Konstantin Ryabitsev]

On Fri, Apr 05, 2024 at 01:57:32PM -0500, Rob Landley wrote:
> Let's see, google says it's a random python3 tool, probably wants a newer
> python3 version than I've got because everything that uses python3 does, it says
> "you can run it directly from the git repository"...
> 
> $ ./b4.sh
> Traceback (most recent call last):
>   File "/home/landley/b4/src/b4/command.py", line 10, in <module>
>     import b4
>   File "/home/landley/b4/src/b4/__init__.py", line 37, in <module>
>     from typing import Optional, Tuple, Set, List, BinaryIO, Union, Sequence,
> Literal, Iterator, Dict
> ImportError: cannot import name 'Literal' from 'typing'
> (/usr/lib/python3.7/typing.py)

Python 3.7 is EOL as of last June, which is why you're seeing this error
trying to run the latest master branch.

To be able to use a EOL version of Python, you will need to run a contemporary
release of b4, which is 0.11. To do so, you may check out the stable-0.11.y
branch and repeat this operation.

-K

Re: [PATCH v7 11/37] pci: pci-sh7751: Add SH7751 PCI driver

[Mayank Rana]

Hi,

On 4/3/2024 9:59 PM, Yoshinori Sato wrote:
> Renesas SH7751 CPU Internal PCI Controller driver.
> 
> Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
> ---
>   drivers/pci/controller/Kconfig      |   9 +
>   drivers/pci/controller/Makefile     |   1 +
>   drivers/pci/controller/pci-sh7751.c | 342 ++++++++++++++++++++++++++++
>   3 files changed, 352 insertions(+)
>   create mode 100644 drivers/pci/controller/pci-sh7751.c
> 
> diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> index e534c02ee34f..a2fd917a2e03 100644
> --- a/drivers/pci/controller/Kconfig
> +++ b/drivers/pci/controller/Kconfig
> @@ -353,6 +353,15 @@ config PCIE_XILINX_CPM
>   	  Say 'Y' here if you want kernel support for the
>   	  Xilinx Versal CPM host bridge.
>   
> +config PCI_SH7751
> +	bool "Renesas SH7751 PCI controller"
> +	depends on OF
> +	depends on CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R || COMPILE_TEST
> +	select PCI_HOST_COMMON
> +	help
> +	  Say 'Y' here if you want kernel to support the Renesas SH7751 PCI
> +	  Host Bridge driver.
> +
>   source "drivers/pci/controller/cadence/Kconfig"
>   source "drivers/pci/controller/dwc/Kconfig"
>   source "drivers/pci/controller/mobiveil/Kconfig"
> diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
> index f2b19e6174af..aa97e5d74e58 100644
> --- a/drivers/pci/controller/Makefile
> +++ b/drivers/pci/controller/Makefile
> @@ -40,6 +40,7 @@ obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o
>   obj-$(CONFIG_PCIE_HISI_ERR) += pcie-hisi-error.o
>   obj-$(CONFIG_PCIE_APPLE) += pcie-apple.o
>   obj-$(CONFIG_PCIE_MT7621) += pcie-mt7621.o
> +obj-$(CONFIG_PCI_SH7751) += pci-sh7751.o
>   
>   # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
>   obj-y				+= dwc/
> diff --git a/drivers/pci/controller/pci-sh7751.c b/drivers/pci/controller/pci-sh7751.c
> new file mode 100644
> index 000000000000..a5340689f737
> --- /dev/null
> +++ b/drivers/pci/controller/pci-sh7751.c
> @@ -0,0 +1,342 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * SH7751 PCI driver
> + * Copyright (C) 2023 Yoshinori Sato
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_address.h>
> +#include <linux/of_pci.h>
> +#include <linux/of_platform.h>
> +#include <linux/pci-ecam.h>
> +#include <linux/platform_device.h>
> +#include <linux/io.h>
> +#include <linux/pci.h>
> +#include <linux/dma-direct.h>
> +#include <asm/addrspace.h>
can you consider to rearranging headers into alphabetically sorted order ?
> +
> +/* PCICR and PCICLKCR write enable magic key */
> +#define PCIC_WE_KEY		(0xa5 << 24)
> +
> +/* PCIC registers */
> +/* 0x0000 - 0x00ff mapped to PCI device configuration space */
> +#define PCIC_PCICR		0x100	/* PCI Control Register */
> +#define PCIC_PCICR_TRSB		BIT(9)	/* Target Read Single */
> +#define PCIC_PCICR_BSWP		BIT(8)	/* Target Byte Swap */
> +#define PCIC_PCICR_PLUP		BIT(7)	/* Enable PCI Pullup */
> +#define PCIC_PCICR_ARBM		BIT(6)	/* PCI Arbitration Mode */
> +#define PCIC_PCICR_MD10		BIT(5)	/* MD10 status */
> +#define PCIC_PCICR_MD9		BIT(4)	/* MD9 status */
> +#define PCIC_PCICR_SERR		BIT(3)	/* SERR output assert */
> +#define PCIC_PCICR_INTA		BIT(2)	/* INTA output assert */
> +#define PCIC_PCICR_PRST		BIT(1)	/* PCI Reset Assert */
> +#define PCIC_PCICR_CFIN		BIT(0)	/* Central Fun. Init Done */
> +
> +#define PCIC_PCILSR0		0x104	/* PCI Local Space Register0 */
> +#define PCIC_PCILSR1		0x108	/* PCI Local Space Register1 */
> +#define PCIC_PCILAR0		0x10c	/* PCI Local Addr Register1 */
> +#define PCIC_PCILAR1		0x110	/* PCI Local Addr Register1 */
> +#define PCIC_PCIINT		0x114	/* PCI Interrupt Register */
> +#define PCIC_PCIINTM		0x118	/* PCI Interrupt Mask */
> +#define PCIC_PCIALR		0x11c	/* Error Address Register */
> +#define PCIC_PCICLR		0x120	/* Error Command/Data */
> +#define PCIC_PCIAINT		0x130	/* Arbiter Interrupt Register */
> +#define PCIC_PCIAINTM		0x134	/* Arbiter Int. Mask Register */
> +#define PCIC_PCIBMLR		0x138	/* Error Bus Master Register */
> +#define PCIC_PCIDMABT		0x140	/* DMA Transfer Arb. Register */
> +#define PCIC_PCIPAR		0x1c0	/* PIO Address Register */
> +#define PCIC_PCIMBR		0x1c4	/* Memory Base Address */
> +#define PCIC_PCIIOBR		0x1c8	/* I/O Base Address Register */
> +
> +#define PCIC_PCIPINT		0x1cc	/* Power Mgmnt Int. Register */
> +#define PCIC_PCIPINT_D3		BIT(1)	/* D3 Pwr Mgmt. Interrupt */
> +#define PCIC_PCIPINT_D0		BIT(0)	/* D0 Pwr Mgmt. Interrupt */
> +
> +#define PCIC_PCIPINTM		0x1d0	/* Power Mgmnt Mask Register */
> +#define PCIC_PCICLKR		0x1d4	/* Clock Ctrl. Register */
> +#define PCIC_PCIBCR1		0x1e0	/* Memory BCR1 Register */
> +#define PCIC_PCIBCR2		0x1e4	/* Memory BCR2 Register */
> +#define PCIC_PCIWCR1		0x1e8	/* Wait Control 1 Register */
> +#define PCIC_PCIWCR2		0x1ec	/* Wait Control 2 Register */
> +#define PCIC_PCIWCR3		0x1f0	/* Wait Control 3 Register */
> +#define PCIC_PCIMCR		0x1f4	/* Memory Control Register */
> +#define PCIC_PCIBCR3		0x1f8	/* Memory BCR3 Register */
> +#define PCIC_PCIPDR		0x220	/* Port IO Data Register */
> +
> +/* PCI IDs */
> +/* Hitachi is the company that led to Renesas. */
> +/* The SH7751 was designed by Hitachi, so it has a Hitachi ID. */
multi-line comments way ?
> +#define PCI_VENDOR_ID_HITACHI	0x1054
> +#define PCI_DEVICE_ID_SH7751	0x3505
> +#define PCI_DEVICE_ID_SH7751R	0x350e
> +
> +/* BSC registers */
> +/* Copy BSC setting to PCI BSC */
> +#define BSC_BCR1		0x0000
> +#define BSC_BCR1_SLAVE		BIT(30)
> +#define BSC_BCR1_BRQEN		BIT(19)
> +#define BSC_BCR2		0x0004
> +#define BSC_BCR3		0x0050
> +#define BSC_WCR1		0x0008
> +#define BSC_WCR2		0x000c
> +#define BSC_WCR3		0x0010
> +#define BSC_MCR			0x0014
> +#define BSC_MCR_MRSET		BIT(30)
> +#define BSC_MCR_RFSH		BIT(2)
> +
> +/* PCIC access wrapper */
> +#define pcic_writel(val, base, reg)	writel(val, base + (reg))
> +#define pcic_readl(base, reg)		readl(base + (reg))
Do you really needed these new macros ? Is it for better readability ?
> +/*
> + * We need to avoid collisions with `mirrored' VGA ports
> + * and other strange ISA hardware, so we always want the
> + * addresses to be allocated in the 0x000-0x0ff region
> + * modulo 0x400.
> + */
> +#define IO_REGION_BASE 0x1000
> +resource_size_t pcibios_align_resource(void *data, const struct resource *res,
> +				resource_size_t size, resource_size_t align)
> +{
> +	resource_size_t start = res->start;
> +
> +	if (res->flags & IORESOURCE_IO) {
> +		if (start < PCIBIOS_MIN_IO + IO_REGION_BASE)
> +			start = PCIBIOS_MIN_IO + IO_REGION_BASE;
> +
> +		/*
> +		 * Put everything into 0x00-0xff region modulo 0x400.
> +		 */
single line comment would work. no ?
> +		if (start & 0x300)
> +			start = (start + 0x3ff) & ~0x3ff;
> +	}
> +
> +	return start;
> +}
> +
> +static int setup_pci_bsc(struct device *dev, void __iomem *pcic,
> +			 void __iomem *bsc, unsigned int area, bool bcr3)
> +{
> +	u32 word;
> +
> +	word = __raw_readl(bsc + BSC_BCR1);
> +	/* check BCR for SDRAM in area */
> +	if (((word >> area) & 1) == 0) {
> +		dev_err(dev, "Area %u is not configured for SDRAM. BCR1=0x%x\n",
> +			area, word);
> +		return -EINVAL;
> +	}
> +	word |= BSC_BCR1_SLAVE;		/* PCIC BSC is slave only */
> +	pcic_writel(word, pcic, PCIC_PCIBCR1);
> +
> +	word = __raw_readw(bsc + BSC_BCR2);
> +	/* check BCR2 for 32bit SDRAM interface*/
> +	if (((word >> (area << 1)) & 0x3) != 0x3) {
> +		dev_err(dev, "Area %u is not 32 bit SDRAM. BCR2=0x%x\n",
> +			area, word);
> +		return -EINVAL;
> +	}
> +	pcic_writel(word, pcic, PCIC_PCIBCR2);
> +
> +	if (bcr3) {
> +		/* BCR3 have only SH7751R */
> +		word = __raw_readw(bsc + BSC_BCR3);
> +		pcic_writel(word, pcic, PCIC_PCIBCR3);
> +	}
> +
> +	/* configure the wait control registers */
> +	word = __raw_readl(bsc + BSC_WCR1);
> +	pcic_writel(word, pcic, PCIC_PCIWCR1);
> +	word = __raw_readl(bsc + BSC_WCR2);
> +	pcic_writel(word, pcic, PCIC_PCIWCR2);
> +	word = __raw_readl(bsc + BSC_WCR3);
> +	pcic_writel(word, pcic, PCIC_PCIWCR3);
> +	word = __raw_readl(bsc + BSC_MCR);
> +	/* Clear MRSET and RFSH bit */
> +	word &= ~(BSC_MCR_MRSET | BSC_MCR_RFSH);
> +	pcic_writel(word, pcic, PCIC_PCIMCR);
> +
> +	return 0;
> +}
> +
> +#define NUM_AREA 7
> +static int set_pci_ranges(struct device *dev,
> +			  void __iomem *pcic, void __iomem *bsc, bool bcr3)
> +{
> +	struct resource_entry *dma, *tmp;
> +	struct pci_host_bridge *bridge;
> +	u32 bsc_done[NUM_AREA];
> +	unsigned int la;
> +
> +	bridge = dev_get_drvdata(dev);
> +	pcic_writel(0, pcic, PCIC_PCILAR0);
> +	pcic_writel(0, pcic, PCIC_PCILAR1);
> +	la = 0;
> +	memset(&bsc_done, 0, sizeof(bsc_done));
> +	resource_list_for_each_entry_safe(dma, tmp, &bridge->dma_ranges) {
> +		struct resource *res = dma->res;
> +		unsigned int area;
> +		u32 word;
> +
> +		switch (resource_type(res)) {
> +		case IORESOURCE_IO:
> +			/* BAR0 is I/O space */
> +			word = res->start | 1;
> +			pcic_writel(word, pcic, PCI_BASE_ADDRESS_0);
> +			word = pcic_readl(pcic, PCI_COMMAND);
> +			word |= PCI_COMMAND_IO;
> +			pcic_writel(word, pcic, PCI_COMMAND);
> +			break;
> +		case IORESOURCE_MEM:
> +			if (la > 4) {
> +				dev_err(dev, "Invalid range definition.\n");
> +				return -EINVAL;
> +			}
> +			area = (res->start >> 26) & 0x07;
> +			word = res->end - res->start;
> +			if (area >= NUM_AREA) {
> +				/* Area 7 is reserved. */
> +				dev_info(dev, "Invalid local address 0x%08x. Ignore it.\n",
> +					 res->start);
> +				break;
> +			}
> +			pcic_writel(res->start, pcic, PCI_BASE_ADDRESS_1 + la);
> +			/* if dummy entry, skip BSC setup */
> +			if (word < 4)
> +				break;
> +			/* BAR1 is local area 0, BAR2 is local area 1 */
> +			pcic_writel(word, pcic, PCIC_PCILSR0 + la);
> +			word = P2SEGADDR(res->start);
> +			pcic_writel(word, pcic, PCIC_PCILAR0 + la);
> +			la += 4;
> +			if (!bsc_done[area]) {
> +				/* check BCR for SDRAM in specified area. And setup PCI BSC. */
> +				if (setup_pci_bsc(dev, pcic, bsc, area, bcr3))
> +					return -EINVAL;
> +				bsc_done[area] = 1;
> +			}
> +			break;
> +		}
> +	}
> +	return 0;
> +}
> +
> +static int sh7751_pci_probe(struct platform_device *pdev)
> +{
> +	struct resource *res, *bscres;
> +	void __iomem *pcic;
> +	void __iomem *bsc;
> +	u16 vid, did;
> +	u32 word;
> +	int ret;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (IS_ERR(res))
> +		return PTR_ERR(res);
> +	pcic = ioremap(res->start, res->end - res->start + 1);
Can you consider using devm_platform_ioremap_resource() API ?
> +	bscres = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> +	bsc = devm_ioremap_resource(&pdev->dev, bscres);
> +	if (IS_ERR(bsc))
> +		return PTR_ERR(bsc);
Same as above.
> +	/* check for SH7751/SH7751R hardware */
> +	word = pcic_readl(pcic, PCI_VENDOR_ID);
> +	vid = word & 0xffff;
> +	did = word >> 16;
> +	if ((vid != PCI_VENDOR_ID_HITACHI) ||
> +	    ((did != PCI_DEVICE_ID_SH7751) &&
> +	     (did != PCI_DEVICE_ID_SH7751R))) {
> +		dev_err(&pdev->dev, "This is not an SH7751(R)\n");
error handling missing iounmap(pcic)
> +		return -ENODEV;
> +	}
> +	dev_info(&pdev->dev, "PCI core found at %pR\n", res);
> +
> +	/* Set the BCR's to enable PCI access */
> +	word = __raw_readl(bsc + BSC_BCR1);
> +	word |= BSC_BCR1_BRQEN;
> +	__raw_writel(word, bsc + BSC_BCR1);
> +
> +	/* Turn the clocks back on (not done in reset)*/
> +	pcic_writel(PCIC_WE_KEY | 0, pcic, PCIC_PCICLKR);
> +	/* Clear Powerdown IRQ's (not done in reset) */
> +	word = PCIC_PCIPINT_D3 | PCIC_PCIPINT_D0;
> +	pcic_writel(word, pcic, PCIC_PCIPINT);
> +
> +	/* set the command/status */
> +	word = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
> +		PCI_COMMAND_PARITY | PCI_COMMAND_WAIT;
> +	pcic_writel(word, pcic, PCI_COMMAND);
> +
> +	/* define this host as the host bridge */
> +	word = PCI_BASE_CLASS_BRIDGE << 24;
> +	pcic_writel(word, pcic, PCI_CLASS_REVISION);
> +
> +	ret = pci_host_common_probe(pdev);
> +	if (ret) {
> +		dev_err(&pdev->dev, "Initialize failed (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	/* Set IO and Mem windows to local address */
> +	if (set_pci_ranges(&pdev->dev, pcic, bsc,
> +			   did == PCI_DEVICE_ID_SH7751R))
> +		return -EINVAL;
error handling to call pci_host_common_remove() ?
> +	pcic_writel(0, pcic, PCIC_PCIIOBR);
> +
> +	if (of_property_read_bool(pdev->dev.of_node, "renesas,bus-arbit-round-robin"))
> +		word |= BIT(0);
> +	else
> +		word = 0;
> +	pcic_writel(word, pcic, PCIC_PCIDMABT);
> +
> +	/* SH7751 init done, set central function init complete */
> +	/* use round robin mode to stop a device starving/overrunning */
multi-line comment ?
> +	word = PCIC_PCICR_CFIN | PCIC_PCICR_ARBM;
> +	pcic_writel(PCIC_WE_KEY | word, pcic, PCIC_PCICR);
> +
> +	return 0;
> +}
> +
> +/*
> + * Direct access to PCI hardware...
> + */
> +#define CONFIG_CMD(bus, devfn, where) \
> +	(0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
> +
> +static void __iomem *sh4_pci_map_bus(struct pci_bus *bus,
> +				     unsigned int devfn, int where)
> +{
> +	struct pci_config_window *cfg = bus->sysdata;
> +	void __iomem *pcic = (void __iomem *)cfg->res.start;
> +
> +	pcic_writel(CONFIG_CMD(bus, devfn, where), pcic, PCIC_PCIPAR);
> +	return pcic + PCIC_PCIPDR;
> +}
> +
> +static const struct pci_ecam_ops pci_sh7751_bus_ops = {
> +	.pci_ops	= {
> +		.map_bus = sh4_pci_map_bus,
> +		.read    = pci_generic_config_read32,
> +		.write   = pci_generic_config_write32,
> +	}
> +};
> +
> +static const struct of_device_id sh7751_pci_of_match[] = {
> +	{ .compatible = "renesas,sh7751-pci",
> +	  .data = &pci_sh7751_bus_ops },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, sh7751_pci_of_match);
> +
> +static struct platform_driver sh7751_pci_driver = {
> +	.driver = {
> +		.name = "sh7751-pci",
> +		.of_match_table = sh7751_pci_of_match,
> +	},
> +	.probe = sh7751_pci_probe,
> +};
> +module_platform_driver(sh7751_pci_driver);
> +
> +MODULE_DESCRIPTION("SH7751 PCI driver");