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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <2061891.QOleSDBFsG@debian64> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2/5/19 2:12 PM, Christian Lamparter wrote: > On Tuesday, February 5, 2019 10:29:34 PM CET Andrew Lunn wrote: >>> For now, I added the DT binding update to the patch as well. >>> But if this is indeed the way to go, it'll get a separate patch. >> >> Hi Christian >> >> You need to be careful with the DT binding. You need to keep backwards >> compatible with it. An old DT blob needs to keep working. I don't >> think this is true with this change. > > Do you mean because of the > > - switch0@0 { > + switch@10 { > compatible = "qca,qca8337"; > #address-cells = <1>; > #size-cells = <0>; > > - reg = <0>; > + reg = <0x10>; > > change? > > or because I removed the phy-handles?> > The reg = <0x10>; will be necessary regardless. Because this > is really a bug in the existing binding example and if it is > copied it will prevent the qca8k driver from loading. > This is due to a resource conflict, because there will be > already a "phy_port1: phy@0" registered at reg = <0>; > So this never worked would have worked. That part is fine, it is the removal of the phy-handle properties that is possibly a problem, but in hindsight, I do not believe it will be a compatibility issue. Lack of "phy-handle" property within the core DSA layer means: utilize the switch's internal MDIO bus (ds->slave_mii_bus) instance, which you are not removing, you are just changing how the PHYs map to port numbers. > > Regards, > Christian > > -- Florian