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From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: Thierry Reding <thierry.reding@gmail.com>,
        Lee Jones <lee.jones@linaro.org>,
        Daniel Thompson <daniel.thompson@linaro.org>,
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Cc: linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, groeck@chromium.org,
        huang lin <hl@rock-chips.com>
Subject: [PATCH 1/2] dt-bindings: pwm-backlight: Add pwm-delay-us property
Date: Wed, 28 Jun 2017 13:16:31 +0200
Message-Id: <20170628111632.22582-1-enric.balletbo@collabora.com>
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From: huang lin <hl@rock-chips.com>

Add a pwm-delay-us property to specify the delay between setting an
initial (non-zero) PWM value and enabling the backlight, and also the
delay between disabling the backlight and setting PWM value to 0.

Signed-off-by: huang lin <hl@rock-chips.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---
 Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt
index 764db86..f75b08f 100644
--- a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt
+++ b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt
@@ -17,6 +17,9 @@ Optional properties:
                "pwms" property (see PWM binding[0])
   - enable-gpios: contains a single GPIO specifier for the GPIO which enables
                   and disables the backlight (see GPIO binding[1])
+  - pwm-delay-us: delay between setting an initial (non-zero) PWM value and
+                  enabling the backlight, and also the delay between disabling
+                  the backlight and setting PWM value to 0.
 
 [0]: Documentation/devicetree/bindings/pwm/pwm.txt
 [1]: Documentation/devicetree/bindings/gpio/gpio.txt
@@ -32,4 +35,5 @@ Example:
 
 		power-supply = <&vdd_bl_reg>;
 		enable-gpios = <&gpio 58 0>;
+		pwm-delay-us = <10000>;
 	};
-- 
2.9.3