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 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-bindings: timer: renesas,tmu: add renesas,tmu-sh7750 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 IRL external 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 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: vendor-prefixes: Add smi 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 | 103 ++++ .../bindings/display/smi,sm501.yaml | 134 +++++ .../renesas,sh7751-intc.yaml | 105 ++++ .../renesas,sh7751-irl-ext.yaml | 83 +++ .../bindings/pci/renesas,sh7751-pci.yaml | 128 +++++ .../bindings/serial/renesas,scif.yaml | 1 + .../devicetree/bindings/sh/cpus.yaml | 73 +++ .../devicetree/bindings/soc/renesas/sh.yaml | 32 ++ .../bindings/timer/renesas,tmu.yaml | 11 +- .../devicetree/bindings/vendor-prefixes.yaml | 4 + arch/sh/Kconfig | 11 +- arch/sh/boards/Kconfig | 24 +- 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 | 74 +++ arch/sh/boot/dts/rts7751r2dplus.dts | 157 ++++++ arch/sh/boot/dts/sh7751r.dtsi | 150 ++++++ arch/sh/boot/dts/usl-5p.dts | 84 +++ arch/sh/configs/j2_defconfig | 11 +- arch/sh/configs/landisk-of_defconfig | 111 ++++ arch/sh/configs/rts7751r2dplus-of_defconfig | 93 ++++ arch/sh/drivers/Makefile | 2 + arch/sh/drivers/pci/pci.c | 6 - arch/sh/include/asm/io.h | 6 + arch/sh/include/asm/irq.h | 10 +- arch/sh/include/asm/pci.h | 4 + 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 | 24 + arch/sh/kernel/setup.c | 51 +- arch/sh/kernel/time.c | 12 + drivers/clk/clk-divider.c | 56 +- drivers/clk/clk-gate.c | 56 +- drivers/clk/renesas/Kconfig | 16 +- drivers/clk/renesas/Makefile | 1 + drivers/clk/renesas/clk-sh7750.c | 498 ++++++++++++++++++ drivers/clocksource/sh_tmu.c | 161 ++++-- drivers/irqchip/Kconfig | 15 + drivers/irqchip/Makefile | 3 + drivers/irqchip/irq-renesas-sh7751.c | 290 ++++++++++ drivers/irqchip/irq-renesas-sh7751irl.c | 227 ++++++++ drivers/mfd/sm501.c | 99 ++++ drivers/pci/controller/Kconfig | 9 + drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pci-sh7751.c | 302 +++++++++++ drivers/pci/controller/pci-sh7751.h | 76 +++ drivers/tty/serial/Kconfig | 2 +- drivers/tty/serial/sh-sci.c | 6 +- drivers/video/fbdev/sm501fb.c | 82 +++ include/dt-bindings/clock/sh7750-cpg.h | 26 + include/dt-bindings/display/sm501.h | 25 + .../interrupt-controller/sh7751-intc.h | 21 + include/linux/clk-provider.h | 22 +- include/linux/sh_intc.h | 7 +- 58 files changed, 3396 insertions(+), 177 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 drivers/pci/controller/pci-sh7751.h 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/sh7751-intc.h -- 2.39.2
