netdev - Re: [PATCHv2 net-next 2/2] net: lan966x: convert fwnode to of

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Message-ID: <CAKxU2N83hKCYbxoFkGUSNMW1k-skCpksQ_eDzPACYEFXP5Fb2A@mail.gmail.com>
Date: Thu, 4 Sep 2025 13:30:35 -0700
From: Rosen Penev <rosenp@...il.com>
To: Daniel Machon <daniel.machon@...rochip.com>
Cc: Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org, 
	Horatiu Vultur <horatiu.vultur@...rochip.com>, 
	"maintainer:MICROCHIP LAN966X ETHERNET DRIVER" <UNGLinuxDriver@...rochip.com>, Andrew Lunn <andrew+netdev@...n.ch>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Paolo Abeni <pabeni@...hat.com>, Russell King <linux@...linux.org.uk>
Subject: Re: [PATCHv2 net-next 2/2] net: lan966x: convert fwnode to of

On Thu, Sep 4, 2025 at 2:01 AM Daniel Machon
<daniel.machon@...rochip.com> wrote:
>
> > On Wed, Sep 3, 2025 at 4:55 PM Jakub Kicinski <kuba@...nel.org> wrote:
> > >
> > > On Mon,  1 Sep 2025 13:20:01 -0700 Rosen Penev wrote:
> > > > This is a purely OF driver. There's no need for fwnode to handle any of
> > > > this, with the exception being phylik_create. Use of_fwnode_handle for
> > > > that.
> > >
> > > Not sure this is worth cleaning up, but I'm not an OF API expert.
> > > It's pretty odd that you're sneaking in an extra error check in
> > > such a cleanup patch without even mentioning it.
> > git grep shows most drivers handling the error.
> >
> > git grep of_get_phy_mode drivers/ | grep -v = | wc -l
> > 7
> > git grep \ =\ of_get_phy_mode drivers/ | wc -l
> > 48
> >
> > I don't see why it should be different here.
> >
> > Actually without handling the error, phy_mode gets used unassigned in
> > lan966x_probe_port
> >
> > The fwnode API is different as it conflates int and phy_connection_t
> > as the same thing.
> > > --
> > > pw-bot: cr
>
> About the added error check - I agree with Jakub that this deserves to be
> mentioned, and should be a patch on its own.
Sounds like a fix for net instead of net-next. Not sure how that would
work as both patches would conflict.
>
> I did some testing on lan966x, and before the added error check, it was
> actually possible to omit phy-mode from the DT, and still have a valid port
> configuration - but then again, the bindings documents phy-mode as a required
> property.. maybe this should be enforced in the code.
Absolutely.
>
> As for the fwnode -> of changes, those looks good to me.
>
> /Daniel
>