[PATCH v10 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@IA1PR20MB4953.namprd20.prod.outlook.com/

Changed from v9:
1. remove missed wrong return value.
2. add documentation for the other interface of the driver.
3. rename repower_action to repower_policy.
4. use break to unify "return 0" in is_visible function.

Changed from v8:
1. rename critical_action to repower_action, and add some comment
2. remove unnecessary wrap function
3. use guard macro to simplify mutex process.

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            |  77 ++++
 .../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                    | 388 ++++++++++++++++++
 8 files changed, 582 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


base-commit: d2d190621b60d77496d36659e1621b20c897b25d
prerequisite-patch-id: 5e7221ed1c63bb4d68e4a2a0141440e32d29e397
--
2.46.0