pwm: add rockchip-pwm.txt

diff --git a/Documentation/devicetree/bindings/pwm/rockchip-pwm.txt b/Documentation/devicetree/bindings/pwm/rockchip-pwm.txt
new file mode 100644 (file)
index 0000000..74a0001
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/rockchip-pwm.txt
@@ -0,0 +1,31 @@
+Rockchip PWM controller
+
+Required properties:
+- compatible: should be "rockchip,<name>-pwm"
+- reg: physical base address and length of the controller's registers
+- #pwm-cells: should be 2.  The first cell specifies the per-chip index
+  of the PWM to use and the second cell is the period in nanoseconds.
+- pinctrl-names: must contain a "default" entry.
+- pinctrl-0: the pincontrol settings to configurethe.
+- clocks: phandle to the PWM source clock
+- clock-names: list of clock names sorted in the same order as the clocks.
+- status: for device state control (enabled/disabled).
+
+Example:
+
+pwm1: pwm@53fb4000 {
+       #pwm-cells = <2>;
+       compatible = "fsl,imx53-pwm", "fsl,imx27-pwm";
+       reg = <0x53fb4000 0x4000>;
+       interrupts = <61>;
+};
+pwm0: pwm@ff680000 {
+       compatible = "rockchip,rk-pwm";                                                                                                                                    
+       reg = <0xff680000 0x10>;                                                                                                                                           
+       #pwm-cells = <2>;                                                                                                                                                  
+       pinctrl-names = "default";                                                                                                                                         
+       pinctrl-0 = <&pwm0_pin>;                                                                                                                                           
+       clocks = <&clk_gates11 11>;                                                                                                                                        
+       clock-names = "pclk_pwm";                                                                                                                                          
+       status = "disabled";                                                                                                                                               
+};