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ARM: dts: imx7d-sdb: Restore pwm backlight support 

This was removed in commit 5eaeaccdae ("ARM: dts: imx7d-sdb: Pass
'enable-gpios' and 'power-supply' properties") with a note claiming that
GPIO1_IO01 is connected to a pin labeled as "PWREN" on the connector.

Despite that label this pin does actually work as a PWM controlling
brightness. So restore pwm functionality.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Leonard Crestez 2018-06-20 13:41:16 +03:00 committed by Shawn Guo
parent eecd78bc78
commit 4a23e6ee9f
1 changed files with 17 additions and 4 deletions
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21
arch/arm/boot/dts/imx7d-sdb.dts
View File

@ -108,10 +108,17 @@
gpio = <&gpio2 14 GPIO_ACTIVE_LOW>;
};
backlight: backlight {
compatible = "pwm-backlight";
pwms = <&pwm1 0 5000000 0>;
brightness-levels = <0 4 8 16 32 64 128 255>;
default-brightness-level = <6>;
status = "okay";
};
panel {
compatible = "innolux,at043tn24";
pinctrl-0 = <&pinctrl_backlight>;
enable-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
backlight = <&backlight>;
power-supply = <&reg_lcd_3v3>;
port {
@ -704,6 +711,12 @@
};
};
&pwm1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pwm1>;
status = "okay";
};
&iomuxc_lpsr {
pinctrl_wdog: wdoggrp {
fsl,pins = <
@ -711,9 +724,9 @@
>;
};
pinctrl_backlight: backlightgrp {
pinctrl_pwm1: pwm1grp {
fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO01__GPIO1_IO1 0x110b0
MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x30
>;
};
};