[PATCH v8 0/4] riscv: sophgo: Add SG2042 external hardware monitor support

[Inochi Amaoto]

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

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2.45.2