linux-kernel - Re: [PATCH 1/3] ARM: dts: lan966x: Add gpio-restart

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Date:   Tue, 19 Jul 2022 22:02:35 +0200
From:   Horatiu Vultur - M31836 <Horatiu.Vultur@...rochip.com>
To:     Claudiu Beznea - M18063 <Claudiu.Beznea@...rochip.com>
CC:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        Nicolas Ferre - M43238 <Nicolas.Ferre@...rochip.com>,
        UNGLinuxDriver <UNGLinuxDriver@...rochip.com>,
        "maxime.chevallier@...tlin.com" <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH 1/3] ARM: dts: lan966x: Add gpio-restart

The 07/19/2022 07:52, Claudiu Beznea - M18063 wrote:
> On 19.07.2022 00:29, Horatiu Vultur wrote:
> > The pcb8291 can be rebooted by toggling the GPIO 56. Therefore enable
> > this in DT.
> > 
> > Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
> > ---
> >  arch/arm/boot/dts/lan966x-pcb8291.dts | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/lan966x-pcb8291.dts b/arch/arm/boot/dts/lan966x-pcb8291.dts
> > index d56d2054c38d..02fbf7371a8d 100644
> > --- a/arch/arm/boot/dts/lan966x-pcb8291.dts
> > +++ b/arch/arm/boot/dts/lan966x-pcb8291.dts
> > @@ -16,6 +16,12 @@ chosen {
> >  	aliases {
> >  		serial0 = &usart3;
> >  	};
> > +
> > +	gpio-restart {
> > +		compatible = "gpio-restart";
> > +		gpios = <&gpio 56 GPIO_ACTIVE_LOW>;
> 
> Could you, please, add also pinctrl-names, pinctrl-0 for this gpio?

I am not sure I need to set pinctrl-names and pinctrl-0.
Because I don't need to setup any function for GPIO 56 to be able to
reset.
It is something similar sparx5 [1].

[1] https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/microchip/sparx5_pcb134_board.dtsi#L10

> 
> > +		priority = <200>;
> > +	};
> >  };
> >  
> >  &gpio {
> 

-- 
/Horatiu