linux-kernel - Re: [PATCH v3] arm64: dts: imx8mm-evk: add pwm1/backlight support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <11f8bf43-d6f7-12fe-f5da-1f7a397c4317@pengutronix.de>
Date:   Wed, 13 Apr 2022 18:31:34 +0200
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
Cc:     devicetree@...r.kernel.org, Fabio Estevam <festevam@...il.com>,
        Richard Zhu <hongxing.zhu@....com>,
        linux-amarula@...rulasolutions.com,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Joakim Zhang <qiangqing.zhang@....com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Tim Harvey <tharvey@...eworks.com>,
        linux-arm-kernel@...ts.infradead.org, Li Jun <jun.li@....com>
Subject: Re: [PATCH v3] arm64: dts: imx8mm-evk: add pwm1/backlight support

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@...rulasolutions.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
> +		>;
> +	};
>  };


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |