The R-Car SoCs PWM Timer cannot output duty zero. So, this patch
adds a specific gpio property to output it.

Signed-off-by: Yoshihiro Shimoda <[email protected]>
---
 Documentation/devicetree/bindings/pwm/renesas,pwm-rcar.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/renesas,pwm-rcar.txt 
b/Documentation/devicetree/bindings/pwm/renesas,pwm-rcar.txt
index fbd6a4f..6acaaeb 100644
--- a/Documentation/devicetree/bindings/pwm/renesas,pwm-rcar.txt
+++ b/Documentation/devicetree/bindings/pwm/renesas,pwm-rcar.txt
@@ -26,6 +26,9 @@ Required Properties:
 - pinctrl-0: phandle, referring to a default pin configuration node.
 - pinctrl-names: Set to "default".
 
+Optional properties:
+- renesas,duty-zero-gpios: Specify GPIO for outputting duty zero.
+
 Example: R8A7743 (RZ/G1M) PWM Timer node
 
        pwm0: pwm@e6e30000 {
-- 
2.7.4

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