Re: [PATCH] arm64: defconfig: Change CONFIG_AT803X_PHY from m to y

From: Oliver Graute <oliver.graute@gmail.com>
To: Fabio Estevam <festevam@gmail.com>
Cc: "Marc Gonzalez" <marc.w.gonzalez@free.fr>,
	"Andrew Lunn" <andrew@lunn.ch>, "Peng Fan" <peng.fan@nxp.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Anson Huang" <anson.huang@nxp.com>,
	"André Draszik" <git@andred.net>,
	LKML <linux-kernel@vger.kernel.org>,
	"Russell King" <rmk+kernel@armlinux.org.uk>,
	dl-linux-imx <linux-imx@nxp.com>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Heiner Kallweit" <hkallweit1@gmail.com>
Subject: Re: [PATCH] arm64: defconfig: Change CONFIG_AT803X_PHY from m to y
Date: Thu, 28 Nov 2019 11:06:57 +0100	[thread overview]
Message-ID: <20191128100657.GB2460@optiplex> (raw)
In-Reply-To: <CAOMZO5AeMgUjH4pxC4B1OFqHZDgtXs3dAiFazKEa9_txd81v6A@mail.gmail.com>

On 27/11/19, Fabio Estevam wrote:
> Hi Oliver,
> 
> On Wed, Nov 27, 2019 at 9:47 AM Oliver Graute <oliver.graute@gmail.com> wrote:
> 
> > I'am using this DTS which I'am currently working on:
> >
> > https://lists.infradead.org/pipermail/linux-arm-kernel/2019-October/689501.html
> > >
> > > I bet one dollar that 6d4cd041f0af triggered a latent bug in the DTS.
> >
> > So what should I fix in my device tree?
> 
> Some suggestions you could try:
> 
> - Try to use phy-mode = "rgmii-id"; instead,
> - The PHY address 0 does not match the reg value of 4, so you need to
> double check the PHY address and make the @ and reg values to match.

ok I fix that in my dts.

> - If you have a GPIO connected to the Ethernet PHY reset pin, then you
> should describe it in the dts and also provide a delay as per the
> AR803X datasheet.

it seems that currently no ethernet phy reset gpio is connected on that
advantech eval board. The vendor says there is a optional resistor which can
be mounted.

Best regards,

Oliver