Re: [PATCH] ARM: dts: imx6dl: SolidRun: add phy node with 100Mb/s max-speed - Russell King

From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Mark Rutland <mark.rutland@arm.com>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>, Baruch Siach <baruch@tkos.co.il>,
	Fabio Estevam <festevam@gmail.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	tinywrkb <tinywrkb@gmail.com>,
	open list <linux-kernel@vger.kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	NXP Linux Team <linux-imx@nxp.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Shawn Guo <shawnguo@kernel.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] ARM: dts: imx6dl: SolidRun: add phy node with 100Mb/s max-speed
Date: Tue, 17 Sep 2019 18:37:28 +0100	[thread overview]
Message-ID: <20190917173728.GZ25745@shell.armlinux.org.uk> (raw)
In-Reply-To: <20190917172658.GB9591@lunn.ch>

On Tue, Sep 17, 2019 at 07:26:58PM +0200, Andrew Lunn wrote:
> > diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> > index b3893347804d..85cf4a4a5e81 100644
> > --- a/drivers/net/phy/at803x.c
> > +++ b/drivers/net/phy/at803x.c
> 
> Hi Russell
> 
> This won't work. In the kernel logs, you see 
> 
> kernel: Generic PHY 2188000.ethernet-1:00: attached PHY driver [Generic PHY]
> 
> The generic PHY driver is being used, not the at803x driver.

Well, the _correct_ driver needs to be used for the PHY specific
features to be properly controlled.  Using the generic driver
in this situation will not be guaranteed to work.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

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