From 43e9082fbccc7df8b2028c1ba040c58cefda703f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marek=20Beh=C3=BAn?= Date: Mon, 18 Sep 2023 18:11:04 +0200 Subject: leds: turris-omnia: Add support for enabling/disabling HW gamma correction MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If the MCU on Turris Omnia is running newer firmware versions, the LED controller supports RGB gamma correction (and enables it by default for newer boards). Determine whether the gamma correction setting feature is supported and add the ability to set it via sysfs attribute file. Signed-off-by: Marek Behún Link: https://lore.kernel.org/r/20230918161104.20860-5-kabel@kernel.org Signed-off-by: Lee Jones --- .../ABI/testing/sysfs-class-led-driver-turris-omnia | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia index c4d46970c1cf..369b4ae8be5f 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//device/gamma_correction +Date: August 2023 +KernelVersion: 6.6 +Contact: Marek Behún +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 -- cgit v1.2.3