Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / pwm / pwm-lp3943.txt

diff --git a/kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt b/kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt
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+TI/National Semiconductor LP3943 PWM controller
+
+Required properties:
+  - compatible: "ti,lp3943-pwm"
+  - #pwm-cells: Should be 2. See pwm.txt in this directory for a
+                description of the cells format.
+                Note that this hardware limits the period length to the
+                range 6250~1600000.
+  - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1.
+    0 = output 0
+    1 = output 1
+    .
+    .
+    15 = output 15
+
+Example:
+PWM 0 is for RGB LED brightness control
+PWM 1 is for brightness control of LP8557 backlight device
+
+&i2c3 {
+       lp3943@60 {
+               compatible = "ti,lp3943";
+               reg = <0x60>;
+
+               /*
+                * PWM 0 : output 8, 9 and 10
+                * PWM 1 : output 15
+                */
+               pwm3943: pwm {
+                       compatible = "ti,lp3943-pwm";
+                       #pwm-cells = <2>;
+                       ti,pwm0 = <8 9 10>;
+                       ti,pwm1 = <15>;
+               };
+       };
+
+};
+
+/* LEDs control with PWM 0 of LP3943 */
+pwmleds {
+       compatible = "pwm-leds";
+       rgb {
+               label = "indi::rgb";
+               pwms = <&pwm3943 0 10000>;
+               max-brightness = <255>;
+       };
+};
+
+&i2c4 {
+       /* Backlight control with PWM 1 of LP3943 */
+       backlight@2c {
+               compatible = "ti,lp8557";
+               reg = <0x2c>;
+
+               pwms = <&pwm3943 1 10000>;
+               pwm-names = "lp8557";
+       };
+};