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Subject[PATCH v3] arm64: dts: imx8mm-evk: add pwm1/backlight support
Date
Add pwm1/backlight support nodes for imx8mm_evk board.
Align with u-boot dts

References:
- https://patchwork.ozlabs.org/project/uboot/patch/20220326111911.13720-9-tommaso.merciai@amarulasolutions.com/

Signed-off-by: Tommaso Merciai <tommaso.merciai@amarulasolutions.com>
---
Changes since v1:
- Fix commit body
- Enable pwm, backlight

Changes since v2:
- Remove status okay from pwm1,backlight (enable as default)

arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
index 6d67df7692f1..c50d2cc3ca71 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
@@ -59,6 +59,14 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
enable-active-high;
};

+ backlight: backlight {
+ compatible = "pwm-backlight";
+ pwms = <&pwm1 0 5000000>;
+ brightness-levels = <0 255>;
+ num-interpolated-steps = <255>;
+ default-brightness-level = <250>;
+ };
+
ir-receiver {
compatible = "gpio-ir-receiver";
gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
@@ -395,6 +403,11 @@ &wdog1 {
status = "okay";
};

+&pwm1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_backlight>;
+};
+
&iomuxc {
pinctrl_fec1: fec1grp {
fsl,pins = <
@@ -549,4 +562,10 @@ pinctrl_wdog: wdoggrp {
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0x166
>;
};
+
+ pinctrl_backlight: backlightgrp {
+ fsl,pins = <
+ MX8MM_IOMUXC_GPIO1_IO01_PWM1_OUT 0x06
+ >;
+ };
};
--
2.25.1
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