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Message-ID: <20190710123932.28244-4-jjhiblot@ti.com>
Date: Wed, 10 Jul 2019 14:39:31 +0200
From: Jean-Jacques Hiblot <jjhiblot@...com>
To: <jacek.anaszewski@...il.com>, <pavel@....cz>, <robh+dt@...nel.org>,
<mark.rutland@....com>, <lee.jones@...aro.org>,
<daniel.thompson@...aro.org>, <jingoohan1@...il.com>
CC: <dmurphy@...com>, <linux-leds@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
<tomi.valkeinen@...com>, Jean-Jacques Hiblot <jjhiblot@...com>
Subject: [PATCH v3 3/4] dt-bindings: backlight: Add led-backlight binding
Add DT binding for led-backlight.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...com>
---
.../bindings/leds/backlight/led-backlight.txt | 28 +++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/led-backlight.txt
diff --git a/Documentation/devicetree/bindings/leds/backlight/led-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/led-backlight.txt
new file mode 100644
index 000000000000..0444eec8efe1
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.txt
@@ -0,0 +1,28 @@
+led-backlight bindings
+
+This binding is used to describe a basic backlight device made of LEDs.
+It can also be used to describe a backlight device controlled by the output of
+a LED driver.
+
+Required properties:
+ - compatible: "led-backlight"
+ - leds: a list of LEDs
+
+Optional properties:
+ - brightness-levels: Array of distinct brightness levels. The levels must be
+ in the range accepted by the underlying LED devices.
+ This is used to translate a backlight brightness level
+ into a LED brightness level. if not provided, the
+ identity mapping is used.
+
+ - default-brightness-level: The default brightness level.
+
+Example:
+
+ backlight {
+ compatible = "led-backlight";
+
+ leds = <&led1>, <&led2>;
+ brightness-levels = <0 4 8 16 32 64 128 255>;
+ default-brightness-level = <6>;
+ };
--
2.17.1
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