linux-kernel - Re: [PATCH 2/2] ARM: dts: owl-s500-roseapplepi: Add ethernet support

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Message-ID: <20210611063940.GD6950@thinkpad>
Date:   Fri, 11 Jun 2021 12:09:40 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Cristian Ciocaltea <cristian.ciocaltea@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-actions@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ARM: dts: owl-s500-roseapplepi: Add ethernet support

On Fri, Jun 11, 2021 at 09:31:47AM +0300, Cristian Ciocaltea wrote:
> On Fri, Jun 11, 2021 at 11:26:06AM +0530, Manivannan Sadhasivam wrote:
> > On Fri, Jun 11, 2021 at 12:09:22AM +0300, Cristian Ciocaltea wrote:
> > > Add pinctrl configuration for enabling the Ethernet MAC on RoseapplePi
> > > SBC. Additionally, provide the necessary properties for the generic S500
> > > ethernet node in order to setup PHY and MDIO.
> > > 
> > > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...il.com>
> > > ---
> > >  arch/arm/boot/dts/owl-s500-roseapplepi.dts | 56 ++++++++++++++++++++++
> > >  1 file changed, 56 insertions(+)
> > > 
> > > diff --git a/arch/arm/boot/dts/owl-s500-roseapplepi.dts b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> > > index b8c5db2344aa..bffabc7eaa50 100644
> > > --- a/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> > > +++ b/arch/arm/boot/dts/owl-s500-roseapplepi.dts

[...]

> > > +	mdio {
> > > +		#address-cells = <1>;
> > > +		#size-cells = <0>;
> > > +
> > > +		reset-gpios = <&pinctrl 88 GPIO_ACTIVE_LOW>; /* GPIOC24 */
> > > +		reset-delay-us = <10000>;
> > > +		reset-post-delay-us = <150000>;
> > 
> > reset-* properties belong to "ethernet-phy" node. Also, while adding new nodes
> > please run the dtbs_check and try to address the warnings.
> 
> The properties are those described in Documentation/devicetree/bindings/net/mdio.yaml

Do you mean the reset properties are applicable for all PHYs in this SoC?

> The dtbs_check doesn't report any issues in my case, usually this
> happens when dtschema is not updated to the latest version. I always
> run the following command after rebasing to a new kernel version:
> 
>   pip3 install --upgrade dtschema
> 

That's good!

Thanks,
Mani

> Thanks for the review,
> Cristi
> 
> > Thanks,
> > Mani
> > 
> > > +
> > > +		eth_phy: ethernet-phy@3 {
> > > +			reg = <0x3>;
> > > +			max-speed = <100>;
> > > +			interrupt-parent = <&sirq>;
> > > +			interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> > > +		};
> > > +	};
> > > +};
> > > +
> > >  &twd_timer {
> > >  	status = "okay";
> > >  };
> > > -- 
> > > 2.32.0
> > >