[PATCH v8 0/6] leds: Add powerdown gpio for is31fl32xx

[Jun Yan <jerrysteve1101@gmail.com>]

This patch series primarily adds the powerdown-gpios support
for the IS31FL32xx controller.It also includes a fix and
dt-bindings updates derived from previous attempts [1].

Patch 1 and patch 2 are based on a previous attempt [1].
The driver-related updates in patch 2 have already been merged.

Patch 3 and Patch 4 add support for the powerdown-gpios property,
which corresponds to the SDB pin of the IS31FL32xx series chips.
This pin is used to enter and exit the hardware powerdown mode.

Patch 5 fixes errors introduced by previous changes. It impacts
the brightness control function of the IS31FL3236.

Patch 6 resolves regression caused by prior changes,
and fixes the 22kHz PWM output functionality for IS31FL3236A.

[1] https://lore.kernel.org/all/20250723-leds-is31fl3236a-v6-0-210328058625@thegoodpenguin.co.uk/

Changes in v8:
- Fix code and commit message style issues noted by Lee Jones.
- https://lore.kernel.org/all/20260520135659.1430008-1-jerrysteve1101@gmail.com

Changes in v7:
- Fix code style (spaces/tabs) and commit messages per checkpatch.pl outputs
- Link to v6: https://lore.kernel.org/all/20260520133343.1423946-1-jerrysteve1101@gmail.com/

Changes in v6:
- Add fix for 22kHz PWM output regression on IS31FL3236A
- Correct typo in vendor prefix for Integrated Silicon Solution
- Restore hardware shutdown state upon driver removal
- Link to v5: https://lore.kernel.org/all/20260508131139.1523597-1-jerrysteve1101@gmail.com/

Changes in v5:
- Adjust the unit-address in dt-binding to hex addresses, and remove unnecessary if/then constraints.
- Link to v4: https://lore.kernel.org/all/20260505145354.1267095-1-jerrysteve1101@gmail.com/

Changes in v4:
- Fixed compilation build errors due to missing header files
- Link to v3: https://lore.kernel.org/all/20260429154449.730880-1-jerrysteve1101@gmail.com/

Changes in v3:
- Replace shutdown-gpios with powerdown-gpios, follow gpio-consumer-common binding.
- Link to v2: https://lore.kernel.org/all/20260428023401.330308-1-jerrysteve1101@gmail.com/

Changes in v2:
- Fix $id mismatch with file name in dt-binding.
- Link to v1: https://lore.kernel.org/all/20260428003412.322032-1-jerrysteve1101@gmail.com/

Jun Yan (6):
  dt-bindings: leds: issi,is31fl32xx: convert the binding to yaml
  dt-bindings: leds: issi,is31fl32xx: add support for is31fl3236a
  dt-bindings: leds: issi,is31fl32xx: Add powerdown-gpios property
  leds: is31fl32xx: Add powerdown pin for hardware shutdown mode
  leds: is31fl32xx: Fix missing brightness_steps for is31fl3236
  leds: is31fl32xx: Move pwm frequency setting to init_regs()

 .../bindings/leds/issi,is31fl32xx.yaml        | 187 ++++++++++++++++++
 .../bindings/leds/leds-is31fl32xx.txt         |  53 -----
 drivers/leds/leds-is31fl32xx.c                |  34 ++--
 3 files changed, 210 insertions(+), 64 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/leds/issi,is31fl32xx.yaml
 delete mode 100644 Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt

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2.54.0