[PATCH v5 0/4] Kinetic ExpressWire library and KTD2801 backlight driver

[Duje Mihanović]

Hello,

This series adds support for the Kinetic KTD2801 LED backlight driver
IC found in samsung,coreprimevelte.

Support is already upstream for the somewhat similar KTD2692 flash
driver, and this series since v3 also moves its ExpressWire code into a
separate library and converts the KTD2692 driver to use that library.

Signed-off-by: Duje Mihanović <duje.mihanovic at skole.hr>
---
Changes in v5:
- Split up ExpressWire library and KTD2692 conversion
- Rebase on v6.8-rc1
- Link to v4: https://lore.kernel.org/r/20240122-ktd2801-v4-0-33c986a3eb68@skole.hr

Changes in v4:
- Drop 'extern' keywords in leds-expresswire.h
- Add 'expresswire_write_u8' to leds-expresswire.c and use it in the two
  drivers
- Move GPIOLIB dependency to LEDS_EXPRESSWIRE instead of letting clients
  handle it
- Drop time constant macros
- Drop delay.h include in ktd2692
- Drop bits.h and delay.h includes in ktd2801
- Link to v3: https://lore.kernel.org/r/20240120-ktd2801-v3-0-fe2cbafffb21@skole.hr

Changes in v3:
- Split ExpressWire code into library (and convert KTD2692 to use this
  library)
- Rewrite commit messages
- Add link to datasheet
- Drop of.h include in ktd2801
- Use _cansleep and usleep_range when powering off
- Clean up bitwise operation in update_status
- Link to v2: https://lore.kernel.org/r/20240118-ktd2801-v2-0-425cf32e0769@skole.hr

Changes in v2:
- Address maintainer comments:
  - Drop MODULE_ALIAS
  - Rename enable-gpios to ctrl-gpios
  - Rename ktd2801_backlight->desc to ktd2801_backlight->gpiod
  - Give time constants more descriptive names and note their origins in
    Samsung driver
  - Convert to GPIO_ACTIVE_HIGH
- Update trailers
- Link to v1: https://lore.kernel.org/r/20231005-ktd2801-v1-0-43cd85b0629a@skole.hr

---
Duje Mihanović (4):
      leds: introduce ExpressWire library
      leds: ktd2692: convert to use ExpressWire library
      dt-bindings: backlight: add Kinetic KTD2801 binding
      backlight: Add Kinetic KTD2801 backlight support

 .../bindings/leds/backlight/kinetic,ktd2801.yaml   |  46 ++++++++
 MAINTAINERS                                        |  13 +++
 drivers/leds/Kconfig                               |   4 +
 drivers/leds/Makefile                              |   3 +
 drivers/leds/flash/Kconfig                         |   2 +-
 drivers/leds/flash/leds-ktd2692.c                  | 116 +++++--------------
 drivers/leds/leds-expresswire.c                    |  68 +++++++++++
 drivers/video/backlight/Kconfig                    |   7 ++
 drivers/video/backlight/Makefile                   |   1 +
 drivers/video/backlight/ktd2801-backlight.c        | 128 +++++++++++++++++++++
 include/linux/leds-expresswire.h                   |  36 ++++++
 11 files changed, 334 insertions(+), 90 deletions(-)
---
base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
change-id: 20231004-ktd2801-0f3883cb59d0

Best regards,
-- 
Duje Mihanović <duje.mihanovic at skole.hr>