[v3,0/4] thermal: renesas: Add support for RZ/G3S

Message

Claudiu Beznea March 24, 2025, 1:56 p.m. UTC

From: Claudiu Beznea <[e-mail]>

Hi,

This series adds thermal support for the Renesas RZ/G3S SoC.

Series is organized as follows:
- patches 1-2/4:	add thermal support for RZ/G3S
- patches 3-4/5:	add device tree support

Merge strategy, if any:
- patches 1-2/4 can go through the thermal tree
- patches 3-4/4 can go through the Renesas tree

Thank you,
Claudiu Beznea

Changes in v3:
- drop runtime resume/suspend from the temperature reading function;
  this is not needed as the temperature is read with ADC; this is
  confirmed by the HW team
- use dedicated function to open the devres group in probe; in this
  way the thermal probe code is simpler

Changes in v2:
- dropped the already applied patches
- dropped patch 2/6 from v1 as the devres_open_group()/devres_release_group()
  approach was implemented in this version (similar to what was proposed in
  [1])
- collected tags
- added a passive trip point not bound to any cooling device, as proposed
  in the review process
- decreased the trip points temperature
- convert the temperature to mili degree Celsius before applying the
  computation formula to avoid losing precision
- use int variables (instead of unsigned) for temperature computation

[1] https://lore.kernel.org/all/[e-mail]/

Claudiu Beznea (4):
  dt-bindings: thermal: r9a08g045-tsu: Document the TSU unit
  thermal: renesas: rzg3s: Add thermal driver for the Renesas RZ/G3S SoC
  arm64: dts: renesas: r9a08g045: Add TSU node
  arm64: defconfig: Enable RZ/G3S thermal

 .../thermal/renesas,r9a08g045-tsu.yaml        |  93 ++++++
 MAINTAINERS                                   |   7 +
 arch/arm64/boot/dts/renesas/r9a08g045.dtsi    |  49 ++-
 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     |   4 -
 arch/arm64/configs/defconfig                  |   1 +
 drivers/thermal/renesas/Kconfig               |   8 +
 drivers/thermal/renesas/Makefile              |   1 +
 drivers/thermal/renesas/rzg3s_thermal.c       | 313 ++++++++++++++++++
 8 files changed, 471 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/thermal/renesas,r9a08g045-tsu.yaml
 create mode 100644 drivers/thermal/renesas/rzg3s_thermal.c