[PATCH v4 RESEND 0/3] Apple DWI backlight driver

[Nick Chan <towinchenmi@gmail.com>]

Apple SoCs come with a 2-wire interface named DWI. On some iPhones, iPads
and iPod touches the backlight controller is connected via this interface.
This series adds a backlight driver for backlight controllers connected
this way.

Changes since v3:
- $ref to common.yaml in bindings
- (and then additionalProperties is changed to unevaluatedProperties)
- Use hex everywhere in bindings example
- Use sizeof(*dwi_bl) instead of the type of the struct when doing
devm_kzalloc()
- Use devm_platform_get_and_ioremap_resource() in driver
- Fix sorting in drivers/video/backlight/Makefile
- In drivers/video/backlight/Kconfig, move config to right after
BACKLIGHT_APPLE
- Explain this driver being completely different from apple_bl

v3: https://lore.kernel.org/asahi/20241209075908.140014-1-towinchenmi@gmail.com/T

Changes since v2:
- Add missing includes in driver
- Fix file path in MAINTAINERS

v2: https://lore.kernel.org/asahi/20241207130433.30351-1-towinchenmi@gmail.com/T

Changes since v1:
- Fixed dt-bindings $id.
- Make power-domains an optional property in dt-bindings.
- Added missing error checking after devm_ioremap_resource() in
dwi_bl_probe().

v1: https://lore.kernel.org/asahi/20241206172735.4310-1-towinchenmi@gmail.com/T

Nick Chan
---

Nick Chan (3):
  dt-bindings: leds: backlight: apple,dwi-bl: Add Apple DWI backlight
  backlight: dwi_bl: Add Apple DWI backlight driver
  MAINTAINERS: Add entries for Apple DWI backlight controller

 .../bindings/leds/backlight/apple,dwi-bl.yaml |  57 ++++++++
 MAINTAINERS                                   |   2 +
 drivers/video/backlight/Kconfig               |  12 ++
 drivers/video/backlight/Makefile              |   1 +
 drivers/video/backlight/dwi_bl.c              | 122 ++++++++++++++++++
 5 files changed, 194 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml
 create mode 100644 drivers/video/backlight/dwi_bl.c


base-commit: 4bbf9020becbfd8fc2c3da790855b7042fad455b
-- 
2.47.1