[PATCH v4 0/5] thermal: loongson2: Add support for Loongson-2K0300 SoC

[Binbin Zhou <zhoubinbin@loongson.cn>]

Hi all:

This patch series adds thermal zone support for the Loongson-2K0300 SoC.

The Loongson-2K0300's thermal sensor is generally compatible with the
existing Loongson-2K series, but it features several key differences:
1. It has an independent CPU ID register for reading chip version
information.
2. The raw temperature output field has been extended from 8 bits to 11
bits.
3. The temperature calculation formula has been updated to incorporate a
correction factor based on the version information.

To ensure robustness on older hardware revisions, a fallback mechanism
is included: if the calculated temperature falls outside the valid range
(-55 TO 125),  the driver falls back to a simpler calculation and prints
a warning.

The patches have been validated on the Loongson-2K0300 development board.

Thanks.
Binbin

=========
V4:
 - Rebase on linux-mfd/for-mfd-next;
Patch (3/5):
 - Remove the `compatible` adding to the `select` node.

Link to V3:
https://lore.kernel.org/all/cover.1785480242.git.zhoubinbin@loongson.cn/

V3:
Patch (2/5):
 - New patch for moving thermal_ops to chip_data;
Patch (3/5):
 - Correct spelling errors;
Patch (4/5):
 - Add Acked-by from Conor, thanks;
Patch (5/5):
 - Keep loongson2_thermal_data->chip_data as const, and use
   data->flags as the private data.
 - Renmae LOONGSON2_THSENS_OUT_10B_MASK ->
   LOONGSON2_THSENS_OUT_11B_MASK;

Link to V2:
https://lore.kernel.org/all/cover.1784619512.git.zhoubinbin@loongson.cn/

V2:
Patch (1/4):
 - New patch form Sashiko;
Patch (2/4):
 - New patch for adding chipid syscon compatible;
Patch (3/4):
 - Use `loongson,chipid` phandle replace reg property;
Patch (3/4):
 - Refact `calib_offset` calculate routing;
 - Add LS2K0300_OLD_FUSE_FLAG flag.

Link to V1:
https://lore.kernel.org/all/cover.1783670011.git.zhoubinbin@loongson.cn/

Binbin Zhou (5):
  thermal/drivers/loongson2: Correct thermal sensor registration loop
  thermal/drivers/loongson2: Move thermal_ops to chip_data for SoC
    scalability
  dt-bindings: mfd: syscon: Allow syscon compatible for Loongson-2K0300
    chip id
  dt-bindings: thermal: loongson,ls2k-thermal: Add compatible for
    Loongson-2K0300
  thermal/drivers/loongson2: Add support for Loongson-2K0300

 .../devicetree/bindings/mfd/syscon.yaml       |   1 +
 .../thermal/loongson,ls2k-thermal.yaml        |  73 +++++++++---
 drivers/thermal/loongson2_thermal.c           | 110 ++++++++++++++++--
 3 files changed, 156 insertions(+), 28 deletions(-)


base-commit: b1eb3de64d02cec71b419b9918d1697797fa156d
-- 
2.52.0