p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/arm/boot/dts/imx7d-sdb.dts
View File

@ -108,10 +108,17 @@ reg_can2_3v3: regulator-can2-3v3 {
gpio = <&gpio2 14 GPIO_ACTIVE_LOW>; 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 { panel {
compatible = "innolux,at043tn24"; compatible = "innolux,at043tn24";
pinctrl-0 = <&pinctrl_backlight>; backlight = <&backlight>;
enable-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
power-supply = <&reg_lcd_3v3>; power-supply = <&reg_lcd_3v3>;
port { port {
@ -704,6 +711,12 @@ MX7D_PAD_SD3_STROBE__SD3_STROBE 0x1b
}; };
}; };
&pwm1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pwm1>;
status = "okay";
};
&iomuxc_lpsr { &iomuxc_lpsr {
pinctrl_wdog: wdoggrp { pinctrl_wdog: wdoggrp {
fsl,pins = < fsl,pins = <
@ -711,9 +724,9 @@ MX7D_PAD_LPSR_GPIO1_IO00__WDOG1_WDOG_B 0x74
>; >;
}; };
pinctrl_backlight: backlightgrp { pinctrl_pwm1: pwm1grp {
fsl,pins = < fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO01__GPIO1_IO1 0x110b0 MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x30
>; >;
}; };
}; };