This patchset brings basic support for Renesas RZ/T2H SoC and its evaluation board. The 4 CPUs are enabled, only the serial console is available and the board must boot on a ramdisk. earlycon is supported, though. The RZ/T2H serial controller (SCI) is quite different from the other RZ SoCs, one of the big differences (but not the only) being the 32 bits registers. In order to not modify the existing sh-sci driver too much, a new set of 'ops' function pointer is introduced, allowing to code the specifics of RZ/T2H in a separate file. Termios setting is not supported yet, the default 115200 baudrate being kept by default. Clock support for RZ/T2H is added to the existing renesas-cpg-mssr driver, with some little modifications so that more parameters are passed to the device-specific registration callback. At this stage, the assumption is made that most of the initialization is done earlier by the bootloader. Module clock enable/disable is not supported, because quite hard to test when the only available peripheral is the serial console, and will come in a future patchset. There is an underway discussion on how to group the user selectable Renesas SoC option into bigger families, but such a change is out of scope for this patchset. This patch series is based on master + patch [1] [1]: https://lore.kernel.org/all/20250207113313.545432-1-claudiu.beznea.uj@xxxxxxxxxxxxxx/ Thierry Bultel (13): dt-bindings: soc: Add Renesas RZ/T2H (R9A09G077) SoC dt-bindings: clock: Add cpg for the Renesas RZ/T2H SoC dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci soc: renesas: Add RZ/T2H (R9A09G077) config option clk: renesas: Pass sub struct of cpg_mssr_priv to cpg_clk_register clk: renesas: Add support for R9A09G077 SoC serial: sh-sci: Fix a comment about SCIFA serial: sh-sci: Introduced function pointers serial: sh-sci: Introduced sci_of_data serial: sh-sci: Add support for RZ/T2H SCI arm64: dts: renesas: Add initial support for renesas RZ/T2H SoC arm64: dts: renesas: Add initial support for renesas RZ/T2H eval board arm64: defconfig: Enable Renesas RZ/T2H SoC option .../bindings/clock/renesas,cpg-mssr.yaml | 4 +- .../bindings/serial/renesas,sci.yaml | 64 +- .../bindings/soc/renesas/renesas.yaml | 10 + arch/arm64/boot/dts/renesas/Makefile | 1 + arch/arm64/boot/dts/renesas/r9a09g077.dtsi | 129 ++++ .../dts/renesas/r9a09g077m44-rzt2h-evk.dts | 35 + arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi | 13 + arch/arm64/configs/defconfig | 2 + drivers/clk/renesas/Kconfig | 5 + drivers/clk/renesas/Makefile | 1 + drivers/clk/renesas/r7s9210-cpg-mssr.c | 7 +- drivers/clk/renesas/r8a77970-cpg-mssr.c | 11 +- drivers/clk/renesas/r9a09g077-cpg-mssr.c | 237 +++++++ drivers/clk/renesas/rcar-gen2-cpg.c | 5 +- drivers/clk/renesas/rcar-gen2-cpg.h | 3 +- drivers/clk/renesas/rcar-gen3-cpg.c | 6 +- drivers/clk/renesas/rcar-gen3-cpg.h | 6 +- drivers/clk/renesas/rcar-gen4-cpg.c | 8 +- drivers/clk/renesas/rcar-gen4-cpg.h | 3 +- drivers/clk/renesas/renesas-cpg-mssr.c | 153 +++-- drivers/clk/renesas/renesas-cpg-mssr.h | 43 +- drivers/soc/renesas/Kconfig | 5 + drivers/tty/serial/Kconfig | 7 + drivers/tty/serial/Makefile | 1 + drivers/tty/serial/rzsci.c | 465 ++++++++++++++ drivers/tty/serial/rzsci.h | 12 + drivers/tty/serial/sh-sci-common.h | 171 +++++ drivers/tty/serial/sh-sci.c | 603 ++++++++++-------- drivers/tty/serial/sh-sci.h | 2 - .../clock/renesas,r9a09g077-cpg-mssr.h | 49 ++ include/linux/serial_sci.h | 3 +- include/uapi/linux/serial_core.h | 3 + 32 files changed, 1713 insertions(+), 354 deletions(-) create mode 100644 arch/arm64/boot/dts/renesas/r9a09g077.dtsi create mode 100644 arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts create mode 100644 arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi create mode 100644 drivers/clk/renesas/r9a09g077-cpg-mssr.c create mode 100644 drivers/tty/serial/rzsci.c create mode 100644 drivers/tty/serial/rzsci.h create mode 100644 drivers/tty/serial/sh-sci-common.h create mode 100644 include/dt-bindings/clock/renesas,r9a09g077-cpg-mssr.h -- 2.43.0
