This is a general driver for LM3509 backlight chip of TI. LM3509 is High Efficiency Boost for White LEDs and/or OLED Displays with Dual Current Sinks. This driver supports OLED/White LED select, brightness control and sub/main control. The datasheet can be found at http://www.ti.com/product/lm3509. --- Changes in v5: Renamed lm3509_bl_led_pdata to lm3509_bl_led_data Set backlight_properties.scale to BACKLIGHT_SCALE_NON_LINEAR Add dev_err_probe() for first write to a register Use dev_err_probe() instead of dev_err() v4: https://lore.kernel.org/all/20240310135344.3455294-1-paroga@xxxxxxxxxx/ Changes in v4: Use backlight_*() to access backlight_device Do not set backlight_properties.power v3: https://lore.kernel.org/all/20240309132521.1290173-1-paroga@xxxxxxxxxx/ Changes in v3: Improved device tree bindings documentation v2: https://lore.kernel.org/all/20240308215617.1729664-1-paroga@xxxxxxxxxx/ Changes in v2: Add device tree nodes for each output Addressed multiple smaller review comments v1: https://lore.kernel.org/all/20240302212757.1871164-1-paroga@xxxxxxxxxx/ Patrick Gansterer (2): dt-bindings: backlight: Add Texas Instruments LM3509 backlight: Add new lm3509 backlight driver .../bindings/leds/backlight/ti,lm3509.yaml | 139 +++++++ drivers/video/backlight/Kconfig | 7 + drivers/video/backlight/Makefile | 1 + drivers/video/backlight/lm3509_bl.c | 340 ++++++++++++++++++ 4 files changed, 487 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml create mode 100644 drivers/video/backlight/lm3509_bl.c -- 2.44.0
