Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / leds / leds-pwm.txt

diff --git a/kernel/Documentation/devicetree/bindings/leds/leds-pwm.txt b/kernel/Documentation/devicetree/bindings/leds/leds-pwm.txt
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+LED connected to PWM
+
+Required properties:
+- compatible : should be "pwm-leds".
+
+Each LED is represented as a sub-node of the pwm-leds device.  Each
+node's name represents the name of the corresponding LED.
+
+LED sub-node properties:
+- pwms : PWM property to point to the PWM device (phandle)/port (id) and to
+  specify the period time to be used: <&phandle id period_ns>;
+- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device
+  For the pwms and pwm-names property please refer to:
+  Documentation/devicetree/bindings/pwm/pwm.txt
+- max-brightness : Maximum brightness possible for the LED
+- active-low : (optional) For PWMs where the LED is wired to supply
+  rather than ground.
+- label :  (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger :  (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+twl_pwm: pwm {
+       /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */
+       compatible = "ti,twl6030-pwm";
+       #pwm-cells = <2>;
+};
+
+twl_pwmled: pwmled {
+       /* provides one PWM (id 0 for Charing indicator LED) */
+       compatible = "ti,twl6030-pwmled";
+       #pwm-cells = <2>;
+};
+
+pwmleds {
+       compatible = "pwm-leds";
+       kpad {
+               label = "omap4::keypad";
+               pwms = <&twl_pwm 0 7812500>;
+               max-brightness = <127>;
+       };
+
+       charging {
+               label = "omap4:green:chrg";
+               pwms = <&twl_pwmled 0 7812500>;
+               max-brightness = <255>;
+       };
+};