[PATCH v3 0/3] Add sy7802 flash led driver

[André Apitzsch via B4 Relay]

This series introduces a driver for the Silergy SY7802 charge pump used
in the BQ Aquaris M5 and X5 smartphones.

The implementation is based on information extracted from downstream as
the datasheet provided by a distributor of the hardware didn't include
any information about the i2c register description.

Signed-off-by: André Apitzsch <git@xxxxxxxxxxx>
---
Changes in v3:
- Add R-b tag to first patch
- Extend driver commit message
- Improve readability of defines by using BIT()
- Rename some variables/parameters
  * led_no -> led_id
  * level -> brightness
  * curr -> fled_{strobe,torch}_used_tmp
  * mask -> {flash,torch}_mask
  * i -> child_num
- Restructure structs ("Place th big stuff at the top")
- Declare 'child' on a separate line
- Move multi-line assignments out of declaration block
- Update warning/error messages and comments
- Use gotos to handle error path
- Use devm API to cleanup module's resources
- Init mutex before LED class device is registered to avoid race
  condition
- Link to v2: https://lore.kernel.org/r/20240401-sy7802-v2-0-1138190a7448@xxxxxxxxxxx

Changes in v2:
- bindings: remove unneeded allOf
- bindings: example: move flash-led-controller under i2c node to fix
  check error
- Cc to phone-devel
- Link to v1: https://lore.kernel.org/r/20240327-sy7802-v1-0-db74ab32faaf@xxxxxxxxxxx

---
André Apitzsch (3):
      dt-bindings: leds: Add Silergy SY7802 flash LED
      leds: sy7802: Add support for Silergy SY7802 flash LED controller
      arm64: dts: qcom: msm8939-longcheer-l9100: Add rear flash

 .../devicetree/bindings/leds/silergy,sy7802.yaml   | 100 ++++
 .../boot/dts/qcom/msm8939-longcheer-l9100.dts      |  26 +
 drivers/leds/flash/Kconfig                         |  11 +
 drivers/leds/flash/Makefile                        |   1 +
 drivers/leds/flash/leds-sy7802.c                   | 546 +++++++++++++++++++++
 5 files changed, 684 insertions(+)
---
base-commit: 6a03b35e4395eb2d6e89a38aca00a9fe9cb39ba1
change-id: 20240325-sy7802-f40fc6f56525

Best regards,
-- 
André Apitzsch <git@xxxxxxxxxxx>