linux-kernel - Re: [PATCH v3 05/11] net: stmmac: dwmac-rk: Add internal phy support

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Message-ID: <6cf4697e-7e94-0e14-a059-c80053492da3@rock-chips.com>
Date:   Thu, 3 Aug 2017 22:02:53 +0800
From:   "David.Wu" <david.wu@...k-chips.com>
To:     Florian Fainelli <f.fainelli@...il.com>, davem@...emloft.net,
        heiko@...ech.de, andrew@...n.ch, robh+dt@...nel.org,
        mark.rutland@....com, catalin.marinas@....com, will.deacon@....com,
        olof@...om.net, linux@...linux.org.uk, arnd@...db.de
Cc:     peppe.cavallaro@...com, alexandre.torgue@...com,
        huangtao@...k-chips.com, hwg@...k-chips.com,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, wens@...e.org
Subject: Re: [PATCH v3 05/11] net: stmmac: dwmac-rk: Add internal phy support

Hi Florian & ChenYu

在 2017/8/3 1:38, Florian Fainelli 写道:
> This is incorrect in two ways:
> 
> - this is a property of the PHY, so it should be documented as such in
> Documentation/devicetree/bindings/net/phy.txt so other bindings can
> re-use it
> 
> - if it was specific to your MAC you would expect a vendor prefix to
> this property, which is not there
> 
> An alternative way to implement the external/internal logic selection
> would be mandate that your Ethernet PHY node have a compatible string
> like this:
> 
> phy@0 {
> 	compatible = "ethernet-phy-id1234.d400", "ethernet-phy-802.3-c22";
> };
> 
> Then you don't need this phy-is-internal property, because you can
> locate the PHY node by the phy-handle (see more about that in a reply to
> patch 10) and you can determine ahead of time whether this PHY is
> internal or not based on its compatible string.

We may implement a read_bool_property after parsed phy phandle at 
stmmac_platform.c, which would make MAC driver know it is a internal phy.