linux-kernel - Re: [PATCH 3/3] net: via-rhine: add OF bus binding

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Message-ID: <1390866011.4405.2.camel@deadeye.wl.decadent.org.uk>
Date:	Mon, 27 Jan 2014 23:40:11 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Alexey Charkov <alchark@...il.com>
Cc:	netdev@...r.kernel.org, Tony Prisk <linux@...sktech.co.nz>,
	devicetree@...r.kernel.org, Roger Luethi <rl@...lgate.ch>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] net: via-rhine: add OF bus binding

On Mon, 2014-01-27 at 19:34 +0400, Alexey Charkov wrote:
> 2014/1/27 Ben Hutchings <ben@...adent.org.uk>:
> > On Mon, 2014-01-27 at 15:51 +0400, Alexey Charkov wrote:
> >> This should make the driver usable with VIA/WonderMedia ARM-based
> >> Systems-on-Chip integrated Rhine III adapters. Note that these
> >> are always in MMIO mode, and don't have any known EEPROM.
> > [...]
> >> --- a/drivers/net/ethernet/via/Kconfig
> >> +++ b/drivers/net/ethernet/via/Kconfig
> >> @@ -19,7 +19,7 @@ if NET_VENDOR_VIA
> >>
> >>  config VIA_RHINE
> >>         tristate "VIA Rhine support"
> >> -       depends on PCI
> >> +       depends on (PCI || USE_OF)
> >>         select CRC32
> >>         select MII
> >>         ---help---
> >
> > This seems like the right thing to do, but it means you need to add
> > #ifdef CONFIG_PCI and #ifdef CONFIG_USE_OF around the driver structures
> > and related functions.
> 
> Frankly, I would like to avoid that if possible (as pointed out in the
> cover email), as I believe we would get a cleaner driver without
> #ifdef. This is also the way it was done in via-velocity, and it works
> just fine.

OK, I'm surprised that all the PCI functions have dummy definitions.

> > You should compile-test in configurations that have just one of those
> > dependencies enabled.
> 
> This has been compile-tested and runtime-tested in OF-only
> configuration on WM8950, and Roger also tested it in PCI-only
> configuration, so it seems to work fine.
[...]

Good, then I have no objection.

Ben.

-- 
Ben Hutchings
If at first you don't succeed, you're doing about average.

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