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ARM: dts: imx6q-logicpd: Shutdown LCD regulator during suspend

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The LCD power sequencer is very finicky.  The backlight cannot
be driven until after the sequencer is done.  Until now, the
regulators were marked with 'regulator-always-on' to make sure
it came up before the backlight.  This patch allows the LCD
regulators to power down and prevent the backlight from being
used again until the sequencer is ready.  This reduces
standby power consumption by ~100mW.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Adam Ford 2019-04-02 14:25:46 -05:00 committed by Shawn Guo
parent 45d9125040
commit 6fd6d6f6a2
1 changed files with 2 additions and 2 deletions
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4
arch/arm/boot/dts/imx6q-logicpd.dts
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@ -21,6 +21,8 @@ backlight: backlight-lvds {
panel-lvds0 {
compatible = "okaya,rs800480t-7x0gp";
power-supply = <&reg_lcd_reset>;
backlight = <&backlight>;
port {
panel_in_lvds0: endpoint {
@ -38,7 +40,6 @@ reg_lcd: regulator-lcd {
regulator-max-microvolt = <3300000>;
gpio = <&gpio4 17 GPIO_ACTIVE_HIGH>;
enable-active-high;
regulator-always-on;
vin-supply = <&reg_3v3>;
startup-delay-us = <500000>;
};
@ -52,7 +53,6 @@ reg_lcd_reset: regulator-lcd-reset {
regulator-max-microvolt = <3300000>;
gpio = <&gpio5 2 GPIO_ACTIVE_HIGH>;
enable-active-high;
regulator-always-on;
vin-supply = <&reg_lcd>;
};
};