Add support for the onboard hardware monitor for SG2042. Can be tested with OpenSBI v1.5. The patch require the following i2c patch: https://lore.kernel.org/all/IA1PR20MB4953DB82FB7D75BF8409FFF4BBB72@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ Changed from v7: 1. add mutex protected and fix the return value when writing "critical_action" Changed from v6: 1. restore the driver name to sg2042-mcu 2. remove unnecessary wrap function and check in the driver. 3. add dts and config entry. Changed from v5: 1. rename driver name to sgmcu as it will support more sophgo chip. 2. move some attr to debugfs. 3. add standard crit_hyst support 4. add documentation Changed from v4: 1. use fix patch for binding ref. 2. use unevaluatedProperties instead of additionalProperties for binding Changed from v3: 1. add thermal-sensor check. 2. change node type from syscon to hwmon Changed from v2: 1. fix bindings id path. Changed from v1: 1. Move patch from soc to hwmon. 2. Fix typo. Inochi Amaoto (4): dt-bindings: hwmon: Add Sophgo SG2042 external hardware monitor support drivers: hwmon: sophgo: Add SG2042 external hardware monitor support riscv: dts: sophgo: Add mcu device for Milk-V Pioneer riscv: defconfig: Enable MCU support for SG2042 .../hwmon/sophgo,sg2042-hwmon-mcu.yaml | 43 ++ Documentation/hwmon/index.rst | 1 + Documentation/hwmon/sg2042-mcu.rst | 39 ++ .../boot/dts/sophgo/sg2042-milkv-pioneer.dts | 60 +++ arch/riscv/configs/defconfig | 1 + drivers/hwmon/Kconfig | 11 + drivers/hwmon/Makefile | 1 + drivers/hwmon/sg2042-mcu.c | 406 ++++++++++++++++++ 8 files changed, 562 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/sophgo,sg2042-hwmon-mcu.yaml create mode 100644 Documentation/hwmon/sg2042-mcu.rst create mode 100644 drivers/hwmon/sg2042-mcu.c -- 2.45.2
