arm: tegra: hawkeye: update LP8557 configuration

Config the backlight driver such that PWM output is
automatically disabled when input PWM is disabled.

Bug 1623926

Change-Id: I038ff4d1fc0cd7eca827bccb6cf86754568697e2
Signed-off-by: Daniel Solomon <daniels@nvidia.com>
Reviewed-on: http://git-master/r/717518
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Tested-by: Mitch Luban <mluban@nvidia.com>

diff --git a/arch/arm64/boot/dts/tegra210-hawkeye-p2290-common.dtsi b/arch/arm64/boot/dts/tegra210-hawkeye-p2290-common.dtsi
index 14d9b95cbb830ddc7a011e0f6ac45968cdb86ebd..cf56e1065d3658152b38e06eaae94a8c66fd9c91 100644 (file)
--- a/arch/arm64/boot/dts/tegra210-hawkeye-p2290-common.dtsi
+++ b/arch/arm64/boot/dts/tegra210-hawkeye-p2290-common.dtsi
@@ -128,7 +128,7 @@
 
                        bl-name = "pwm-backlight"; /* Match liblights naming expectations */
                        init-brt = /bits/ 8 <0xFF>; /* Max brightness */
-                       dev-ctrl = /bits/ 8 <0x00>; /* PWM */
+                       dev-ctrl = /bits/ 8 <0x80>; /* PWM, enable standby mode */
                        pwm-period = <29334>;
 
                        pwm-names = "lp8557";
@@ -148,7 +148,7 @@
 
                        bl-name = "pwm-backlight"; /* Match liblights naming expectations */
                        init-brt = /bits/ 8 <0xFF>; /* Max brightness */
-                       dev-ctrl = /bits/ 8 <0x00>; /* PWM */
+                       dev-ctrl = /bits/ 8 <0x80>; /* PWM, enable standby mode */
                        pwm-period = <29334>;
 
                        pwm-names = "lp8557";
@@ -168,7 +168,7 @@
 
                        bl-name = "pwm-backlight"; /* Match liblights naming expectations */
                        init-brt = /bits/ 8 <0xFF>; /* Max brightness */
-                       dev-ctrl = /bits/ 8 <0x00>; /* PWM */
+                       dev-ctrl = /bits/ 8 <0x80>; /* PWM, enable standby mode */
                        pwm-period = <29334>;
 
                        pwm-names = "lp8557";