Merge tag 'leds-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds

Pull LED updates from Lee Jones:
 "Core Frameworks:
   - Add support for a bunch more colours

  New Drivers:
   - Add support for Kinetic KTD2026/7 RGB/White LEDs

  New Functionality:
   - Add support for device to enter HW Controlled Mode to Turris Omnia
     LEDs
   - Add support for HW Gamma Correction to Turris Omnia LEDs

  Fix-ups:
   - Apply new __counted_by() annotation to several data structures
     containing flexible arrays
   - Rid the return value from Platform's .remove() operation
   - Use *_cansleep() variants for instances were threads can sleep
   - Improve the semantics when setting the brightness
   - Generic clean-ups; code reduction, coding style, standard patterns
   - Replace strncpy() with strscpy()
   - Fix-up / add various documentation
   - Re-author the GPIO associated Trigger to use trigger-sources
   - Move to using standard APIs and helpers
   - Improve error checking
   - Stop using static GPIO bases

  Bug Fixes:
   - Fix Pointer to Enum casing warnings
   - Do not pretend that I2C backed device supports SMBUS
   - Ensure PWM LEDs are extinguished when disabled, rather than held in
     a state
   - Fix 'output may be truncated' warnings"

* tag 'leds-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds: (43 commits)
  leds: lp5521: Add an error check in lp5521_post_init_device
  leds: gpio: Update headers
  leds: gpio: Remove unneeded assignment
  leds: gpio: Move temporary variable for struct device to gpio_led_probe()
  leds: gpio: Refactor code to use devm_gpiod_get_index_optional()
  leds: gpio: Utilise PTR_ERR_OR_ZERO()
  leds: gpio: Keep driver firmware interface agnostic
  leds: core: Refactor led_update_brightness() to use standard pattern
  leds: turris-omnia: Fix brightness setting and trigger activating
  leds: sc27xx: Move mutex_init() down
  leds: trigger: netdev: Move size check in set_device_name
  leds: Add ktd202x driver
  dt-bindings: leds: Add Kinetic KTD2026/2027 LED
  leds: core: Add more colors from DT bindings to led_colors
  dt-bindings: leds: Last color ID is now 14 (LED_COLOR_ID_LIME)
  leds: tca6507: Don't use fixed GPIO base
  leds: lp3952: Convert to use maple tree register cache
  leds: lm392x: Convert to use maple tree register cache
  leds: aw200xx: Convert to use maple tree register cache
  leds: lm3601x: Convert to use maple tree register cache
  ...

1 files changed, 14 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
index c4d46970c1cf9..369b4ae8be5f4 100644
--- a/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
+++ b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
@@ -12,3 +12,17 @@ Description:	(RW) On the front panel of the Turris Omnia router there is also
 		able to change this setting from software.
 
 		Format: %i
+
+What:		/sys/class/leds/<led>/device/gamma_correction
+Date:		August 2023
+KernelVersion:	6.6
+Contact:	Marek Behún <kabel@kernel.org>
+Description:	(RW) Newer versions of the microcontroller firmware of the
+		Turris Omnia router support gamma correction for the RGB LEDs.
+		This feature can be enabled/disabled by writing to this file.
+
+		If the feature is not supported because the MCU firmware is too
+		old, the file always reads as 0, and writing to the file results
+		in the EOPNOTSUPP error.
+
+		Format: %i