[PATCH v2 1/2] pwm: add this patch to introduce for rk-pwm and vop-pwm

[Caesar Wang <caesar.wang@rock-chips.com>]

Signed-off-by: Caesar Wang <caesar.wang@rock-chips.com>
---
 Documentation/devicetree/bindings/pwm/pwm-rockchip.txt | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt b/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt
index 3182126..bb6e7f1 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-rockchip.txt
@@ -1,11 +1,14 @@
 Rockchip PWM controller
 
 Required properties:
- - compatible: should be "rockchip,rk2928-pwm"
- - reg: physical base address and length of the controller's registers
- - clocks: phandle and clock specifier of the PWM reference clock
- - #pwm-cells: should be 2. See pwm.txt in this directory for a
-   description of the cell format.
+- compatible: should be "rockchip,<name>-pwm"should be one of following:
+    "rockchip,rk2928-pwm" - support the old version PWM for RK29xx,RK3066,RK3188 SoCs.
+    "rockchip,rk3288-pwm" - support the new version PWM for RK3036,RK3288 SoCs.
+    "rockchip,vop-pwm" - support rockchip integrated VOP-PWM for RK32 SoCs.
+- reg: physical base address and length of the controller's registers.
+- clocks: phandle and clock specifier of the PWM reference clock.
+- #pwm-cells: should be 2. See pwm.txt in this directory for a
+  description of the cell format.
 
 Example:
 
-- 
1.9.1