summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/pwm/pwm-rockchip.txt')
-rw-r--r--Documentation/devicetree/bindings/pwm/pwm-rockchip.txt27
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt b/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt
new file mode 100644
index 000000000..f70956dea
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt
@@ -0,0 +1,27 @@
+Rockchip PWM controller
+
+Required properties:
+ - compatible: should be "rockchip,<name>-pwm"
+ "rockchip,rk2928-pwm": found on RK29XX,RK3066 and RK3188 SoCs
+ "rockchip,rk3288-pwm": found on RK3288 SOC
+ "rockchip,rv1108-pwm", "rockchip,rk3288-pwm": found on RV1108 SoC
+ "rockchip,vop-pwm": found integrated in VOP on RK3288 SoC
+ - reg: physical base address and length of the controller's registers
+ - clocks: See ../clock/clock-bindings.txt
+ - For older hardware (rk2928, rk3066, rk3188, rk3228, rk3288, rk3399):
+ - There is one clock that's used both to derive the functional clock
+ for the device and as the bus clock.
+ - For newer hardware (rk3328 and future socs): specified by name
+ - "pwm": This is used to derive the functional clock.
+ - "pclk": This is the APB bus clock.
+ - #pwm-cells: must be 2 (rk2928) or 3 (rk3288). See pwm.yaml in this directory
+ for a description of the cell format.
+
+Example:
+
+ pwm0: pwm@20030000 {
+ compatible = "rockchip,rk2928-pwm";
+ reg = <0x20030000 0x10>;
+ clocks = <&cru PCLK_PWM01>;
+ #pwm-cells = <2>;
+ };