[PATCH v6 3/3] Documentation: ABI: leds-turris-omnia: document sysfs attribute

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Document the global brightness attribute for the Turris Omnia LED
controller.

Signed-off-by: Marek Behún <marek.behun@xxxxxx>
---
 .../testing/sysfs-class-led-driver-turris-omnia    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia

diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
new file mode 100644
index 000000000000..795a5de12fc1
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
@@ -0,0 +1,14 @@
+What:		/sys/class/leds/<led>/device/brightness
+Date:		July 2020
+KernelVersion:	5.9
+Contact:	Marek Behún <marek.behun@xxxxxx>
+Description:	(RW) On the front panel of the Turris Omnia router there is also
+		a button which can be used to control the intensity of all the
+		LEDs at once, so that if they are too bright, user can dim them.
+
+		The microcontroller cycles between 8 levels of this global
+		brightness (from 100% to 0%), but this setting can have any
+		integer value between 0 and 100. It is therefore convenient to be
+		able to change this setting from software.
+
+		Format: %i
-- 
2.26.2




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