This patchset is a rework from Oleksii's RFC v5 patchset https://lore.kernel.org/all/cover.1698353854.git.oleksii_moisieiev@xxxxxxxx/ This patchset introduces some changes based on RFC v5: - introduce helper get_max_msg_size - support compatible string - iterate the id_table - Support multiple configs in one command - Added i.MX support - Patch 5 firmware: arm_scmi: Add SCMI v3.2 pincontrol protocol basic support is almost same as RFCv5 expect multiple configs support. - Patch 4 the dt-bindings includes compatible string to support i.MX - Rebased on 2023-12-15 linux-next/master If any comments from RFC v5 are missed, I am sorry in advance. This PINCTRL Protocol is following Version 3.2 SCMI Spec Beta release. On ARM-based systems, a separate Cortex-M based System Control Processor (SCP) provides control on pins, as well as with power, clocks, reset controllers. So implement the driver to support such cases. The i.MX95 Example as below: Configuration: The scmi-pinctrl driver can be configured using DT bindings. For example: / { sram0: sram@445b1000 { compatible = "mmio-sram"; reg = <0x0 0x445b1000 0x0 0x400>; #address-cells = <1>; #size-cells = <1>; ranges = <0x0 0x0 0x445b1000 0x400>; scmi_buf0: scmi-sram-section@0 { compatible = "arm,scmi-shmem"; reg = <0x0 0x80>; }; scmi_buf1: scmi-sram-section@80 { compatible = "arm,scmi-shmem"; reg = <0x80 0x80>; }; }; firmware { scmi { compatible = "arm,scmi"; mboxes = <&mu2 5 0>, <&mu2 3 0>, <&mu2 3 1>; shmem = <&scmi_buf0>, <&scmi_buf1>; #address-cells = <1>; #size-cells = <0>; scmi_iomuxc: protocol@19 { compatible = "fsl,imx95-scmi-pinctrl"; reg = <0x19>; }; }; }; }; &scmi_iomuxc { pinctrl_tpm3: tpm3grp { fsl,pins = < IMX95_PAD_GPIO_IO12__TPM3_CH2 0x51e >; }; }; This patchset has been tested on i.MX95-19x19-EVK board. Signed-off-by: Peng Fan <peng.fan@xxxxxxx> --- Oleksii Moisieiev (1): firmware: arm_scmi: Add SCMI v3.2 pincontrol protocol basic support Peng Fan (6): firmware: arm_scmi: introduce helper get_max_msg_size firmware: scmi: support compatible string firmware: arm_scmi: bus: iterate the id_table dt-bindings: firmware: arm,scmi: support pinctrl protocol pinctrl: Implementation of the generic scmi-pinctrl driver pinctrl: scmi: implement pinctrl_scmi_imx_dt_node_to_map .../devicetree/bindings/firmware/arm,scmi.yaml | 99 +++ MAINTAINERS | 7 + drivers/firmware/arm_scmi/Makefile | 1 + drivers/firmware/arm_scmi/bus.c | 49 +- drivers/firmware/arm_scmi/common.h | 2 +- drivers/firmware/arm_scmi/driver.c | 32 +- drivers/firmware/arm_scmi/pinctrl.c | 927 +++++++++++++++++++++ drivers/firmware/arm_scmi/protocols.h | 2 + drivers/pinctrl/Kconfig | 11 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-scmi-imx.c | 117 +++ drivers/pinctrl/pinctrl-scmi.c | 419 ++++++++++ drivers/pinctrl/pinctrl-scmi.h | 12 + include/linux/scmi_protocol.h | 48 ++ 14 files changed, 1710 insertions(+), 17 deletions(-) --- base-commit: 17cb8a20bde66a520a2ca7aad1063e1ce7382240 change-id: 20231215-pinctrl-scmi-4c5b0374f4c6 Best regards, -- Peng Fan <peng.fan@xxxxxxx>
