linux-kernel - [PATCH v5 0/3] Add exynosautov920 thermal support

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Message-ID: <20250925022841.2813150-1-shin.son@samsung.com>
Date: Thu, 25 Sep 2025 11:28:37 +0900
From: Shin Son <shin.son@...sung.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Krzysztof Kozlowski
	<krzk@...nel.org>, "Rafael J . Wysocki" <rafael@...nel.org>, Daniel Lezcano
	<daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>, Lukasz Luba
	<lukasz.luba@....com>, Rob Herring <robh@...nel.org>, Conor Dooley
	<conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, Henrik Grimler
	<henrik@...mler.se>
Cc: Shin Son <shin.son@...sung.com>, linux-pm@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 0/3] Add exynosautov920 thermal support

This patch series adds support for exynosautov920, automotive-grade
processor. Although the exynosautov920's TMU hardware differs slightly
from exisiting platform, its read and calibration logic closely follow
our legacy TMU interface. To prevent runtime and build time errors,
it is kept as a single change rather than being split.

This change merges the new exynosautov920-specific register definitions and
timing parameters into the exynos-tmu driver, ensuring consistent behavior
across all Exynos series. All new code paths have been tested on a
exynosautov920 board and verified to correctly read temperatures and
emulate behavior.

Changes in v5:
- Changed the maximum number of thermal sensors to 15.

Changes in v4:
- Kept 'addtionalProperties: false'.
- Removed the 'samsung,hw-sensor-indices' property in the binding.
- Added the 'samsung,sensors' property in the binding.
- Dropped code-like formatting and rewrote the description in plain,
  hardware-focused language in the commit message.
- Removed the bitmap and replaced the tz_count to sensor_count.

Changes in v3:
- Removed redundant commit message.
- Rephrased the sentences to describe the hardware clearly.
- Restricted sensor indices to V920.
- Set #thermal-sensor-cells per variant.
- Replaced 'additionalProperties' with 'unevaluatedProperties'.
- Removed the duplicate #define and use the original.
- Used lowercase hex in #define.
- Simplified 'temp_to_code' and 'code_to_temp' to one computation
  path by normalizing calib_temp.

Changes in v2:
- Replace the generic property with a vendor-specific one.
- Added an indices property instead of ranges.
- Shortened thermal node name and made them more generic.
- Updated the indices logic accordingly after removing the ranges property.

Shin Son (3):
  dt-bindings: thermal: samsung: Adjust '#thermal-sensor-cells' to 1
  thermal: exynos_tmu: Support new hardware and update TMU interface
  arm64: dts: exynosautov920: Add multiple sensors

 .../thermal/samsung,exynos-thermal.yaml       |  32 +-
 .../boot/dts/exynos/exynosautov920-tmu.dtsi   | 377 ++++++++++++++++++
 .../arm64/boot/dts/exynos/exynosautov920.dtsi |  31 ++
 drivers/thermal/samsung/exynos_tmu.c          | 322 +++++++++++++--
 4 files changed, 724 insertions(+), 38 deletions(-)
 create mode 100644 arch/arm64/boot/dts/exynos/exynosautov920-tmu.dtsi

-- 
2.50.1