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SubjectRe: [PATCH v3] arm64: dts: imx8mm-evk: add pwm1/backlight support
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Hello Tomasso,

On 13.04.22 18:08, Tommaso Merciai wrote:
> 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>;

imx8mm.dtsi has &pwm1 { status = "disabled" };
Where is it enabled?

> +};
> +
> &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
> + >;
> + };
> };


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