[U-Boot] [PATCH 1/4] net: mdio-uclass: name MDIO according to device-name property if preset

[Bin Meng]

Hi Alex,

On Tue, Jul 23, 2019 at 2:51 PM Alex Marginean <alexm.osslist at gmail.com> wrote:
>
> On 7/23/2019 9:38 AM, Bin Meng wrote:
> > On Wed, Jul 17, 2019 at 11:11 PM Alex Marginean
> > <alexandru.marginean at nxp.com> wrote:
> >>
> >> Use the optional property device-name to name the MDIO bus.  This works
> >> around limitations with using the DT node name on devices such as
> >> Armada-8040, which integrates two cp100 cores, both featuring MDIOs at the
> >> same relative offsets and with the same DT node names.
> >> The concept was originally proposed by Marvell as a custom property called
> >> mdio-name specific to Marvell driver.  This patch uses the more generic
> >
> > I was wondering whether such optional custom property name is accepted
> > by the Linux devicetree committee or yet? The general goal is to use
> > exact the same DT as kernel uses, at least for ARM, and that is what I
> > learned from this ML.
>
> I didn't ask, my guess is they would not.  The property is not actually
> describing HW, plus Linux wouldn't need this name anyway.  As far as I
> know MDIOs in Linux are not addressable directly using user-space tools
> and for the purpose of probing devices and matching ethernet/PHY/MDIO
> this property is not useful.  U-Boot on the other hand has the mdio cmd
> which requires unique names and also benefits from friendly names for
> MDIO buses.
> There are other potential solutions for the unique name problem, like
> creating something out of the full DT path of the device, or resolve
> absolute base address and use that.  These aren't as easy to use though.

Thanks for the clarification. Good enough for now :)

Regards,
Bin