[PATCH 8/9] arm: dts: imx8mm_evk: add pwm1/backlight support

[Tommaso Merciai]

On Wed, Mar 16, 2022 at 11:30:19AM +0100, Michael Walle wrote:
> > Add pwm1/backlight support nodes for imx8mm_evk board
> > 
> > Signed-off-by: Tommaso Merciai <tommaso.merciai at amarulasolutions.com>
> > ---
> >  arch/arm/dts/imx8mm-evk.dtsi | 21 +++++++++++++++++++++
> >  1 file changed, 21 insertions(+)
> > 
> > diff --git a/arch/arm/dts/imx8mm-evk.dtsi b/arch/arm/dts/imx8mm-evk.dtsi
> > index 60179e006d..e7a2bd8a64 100644
> > --- a/arch/arm/dts/imx8mm-evk.dtsi
> > +++ b/arch/arm/dts/imx8mm-evk.dtsi
> > @@ -41,6 +41,15 @@
> >  		enable-active-high;
> >  	};
> >  
> > +	backlight: backlight {
> > +		status = "disabled";
> > +		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>;
> > @@ -350,6 +359,12 @@
> >  	status = "okay";
> >  };
> >  
> > +&pwm1 {
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&pinctrl_backlight>;
> > +	status = "disabled";
> > +};
> > +
> >  &iomuxc {
> >  	pinctrl_fec1: fec1grp {
> >  		fsl,pins = <
> > @@ -491,4 +506,10 @@
> >  			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B	0x166
> >  		>;
> >  	};
> > +
> > +	pinctrl_backlight: backlightgrp {
> > +		fsl,pins = <
> > +			MX8MM_IOMUXC_GPIO1_IO01_PWM1_OUT	0x06
> > +		>;
> > +	};
> 
> Will this also be submitted to upstream linux? Otherwise, the device
> trees will diverge.
> 
> -michael

Hi,
At the moment on upstream linux, backlight on pwm1 is not handle. This
will also be submitted on upstream Linux once will merged on U-Boot.

Regards,
Tommaso

-- 
Tommaso Merciai
Embedded Linux Engineer
tommaso.merciai at amarulasolutions.com
__________________________________

Amarula Solutions SRL
Via Le Canevare 30, 31100 Treviso, Veneto, IT
T. +39 042 243 5310
info at amarulasolutions.com
www.amarulasolutions.com