linux-kernel - Re: [PATCH 0/6] arm64: add ethernet to orange pi 3

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Message-ID: <Ynkw9EekNj5Ih5gc@lunn.ch>
Date:   Mon, 9 May 2022 17:19:16 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     LABBE Corentin <clabbe@...libre.com>
Cc:     alexandre.torgue@...s.st.com, broonie@...nel.org,
        calvin.johnson@....nxp.com, davem@...emloft.net,
        edumazet@...gle.com, hkallweit1@...il.com,
        jernej.skrabec@...il.com, joabreu@...opsys.com,
        krzysztof.kozlowski+dt@...aro.org, kuba@...nel.org,
        lgirdwood@...il.com, linux@...linux.org.uk, pabeni@...hat.com,
        peppe.cavallaro@...com, robh+dt@...nel.org, samuel@...lland.org,
        wens@...e.org, netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 0/6] arm64: add ethernet to orange pi 3

On Mon, May 09, 2022 at 03:27:30PM +0200, LABBE Corentin wrote:
> Le Mon, May 09, 2022 at 02:20:07PM +0200, Andrew Lunn a écrit :
> > On Mon, May 09, 2022 at 07:48:51AM +0000, Corentin Labbe wrote:
> > > Hello
> > > 
> > > 2 sunxi board still does not have ethernet working, orangepi 1+ and
> > > orangepi 3.
> > > This is due to the fact thoses boards have a PHY which need 2 regulators.
> > 
> > Why PHY make/module is it which is causing problems?
> > 
> 
> The problem was stmmac support only one regulator for PHY.

I'm trying to understand the differences between the two different
regulators. If you tell me what the PHY is, i might be able to find
the data sheet, and then understand why two regulators are needed and
if one needs to be controlled by the PHY driver, not the MDIO bus
driver.

	Andrew