From: nicolas.pitre@linaro.org (Nicolas Pitre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] net/smsc911x: add device tree probe support
Date: Mon, 25 Jul 2011 22:28:05 -0400 (EDT) [thread overview]
Message-ID: <alpine.LFD.2.00.1107252222540.12766@xanadu.home> (raw)
In-Reply-To: <20110726013026.GH21641@S2100-06.ap.freescale.net>
On Tue, 26 Jul 2011, Shawn Guo wrote:
> On Mon, Jul 25, 2011 at 09:16:40PM -0400, Nicolas Pitre wrote:
> > On Tue, 26 Jul 2011, Shawn Guo wrote:
> >
> > > On Mon, Jul 25, 2011 at 03:37:23PM -0600, Grant Likely wrote:
> > > > On Mon, Jul 25, 2011 at 05:44:00PM +0800, Shawn Guo wrote:
> > > > > It adds device tree probe support for smsc911x driver.
> > > > >
> > > > > Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> > > > > Cc: Grant Likely <grant.likely@secretlab.ca>
> > > > > Cc: Steve Glendinning <steve.glendinning@smsc.com>
> > > > > Cc: David S. Miller <davem@davemloft.net>
> > > > > ---
> > > > > Documentation/devicetree/bindings/net/smsc.txt | 34 +++++++
> > > > > drivers/net/smsc911x.c | 123 +++++++++++++++++++-----
> > > > > 2 files changed, 132 insertions(+), 25 deletions(-)
> > > > > create mode 100644 Documentation/devicetree/bindings/net/smsc.txt
> > > > >
> > > > > diff --git a/Documentation/devicetree/bindings/net/smsc.txt b/Documentation/devicetree/bindings/net/smsc.txt
> > > > > new file mode 100644
> > > > > index 0000000..1920695
> > > > > --- /dev/null
> > > > > +++ b/Documentation/devicetree/bindings/net/smsc.txt
> > > > > @@ -0,0 +1,34 @@
> > > > > +* Smart Mixed-Signal Connectivity (SMSC) LAN Controller
> > > > > +
> > > > > +Required properties:
> > > > > +- compatible : Should be "smsc,lan<model>""smsc,lan"
> > > >
> > > > Drop "smsc,lan". That's far too generic.
> > > >
> > > The following devices are supported by the driver.
> > >
> > > LAN9115, LAN9116, LAN9117, LAN9118
> > > LAN9215, LAN9216, LAN9217, LAN9218
> > > LAN9210, LAN9211
> > > LAN9220, LAN9221
> > >
> > > If we only keep specific <model> as the compatible, we will have a
> > > long match table which is actually used nowhere to distinguish the
> > > device.
> > >
> > > So we need some level generic compatible to save the meaningless
> > > long match table. What about:
> > >
> > > static const struct of_device_id smsc_dt_ids[] = {
> > > { .compatible = "smsc,lan9", },
> > > { /* sentinel */ }
> > > };
> > >
> > > Or:
> > >
> > > static const struct of_device_id smsc_dt_ids[] = {
> > > { .compatible = "smsc,lan91", },
> > > { .compatible = "smsc,lan92", },
> > > { /* sentinel */ }
> > > };
> >
> > None of this unambiguously distinguish the devices supported by this
> > driver and the smc91x driver which supports LAN91C92, LAN91C94,
> > LAN91C95, LAN91C96, LAN91C100, LAN91C110.
> >
> So you suggest to make a long list to explicitly tell the device type
> that the driver supports?
I'm not suggesting anything. :-) I'm merely pointing out that the
above .compatible = "smsc,lan9" or .compatible = "smsc,lan91" are too
generic given that there is another driver with different devices to
which they could also apply.
Nicolas
next prev parent reply other threads:[~2011-07-26 2:28 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-25 9:44 [PATCH] net/smsc911x: add device tree probe support Shawn Guo
2011-07-25 21:37 ` Grant Likely
2011-07-26 1:01 ` Shawn Guo
2011-07-26 1:16 ` Nicolas Pitre
2011-07-26 1:30 ` Shawn Guo
2011-07-26 2:28 ` Nicolas Pitre [this message]
2011-07-29 2:36 ` Shawn Guo
2011-07-29 15:47 ` Grant Likely
2011-07-29 16:03 ` Shawn Guo
2011-07-29 16:26 ` Grant Likely
2011-07-29 17:13 ` Shawn Guo
2011-07-31 0:42 ` Grant Likely
2011-07-29 15:45 ` Grant Likely
2011-07-29 8:43 ` [PATCH v2] " Shawn Guo
2011-07-29 15:53 ` Grant Likely
2011-07-29 16:16 ` Shawn Guo
2011-07-30 18:26 ` [PATCH v3] " Shawn Guo
2011-08-02 1:01 ` David Miller
2011-09-08 14:59 ` Dave Martin
2011-09-08 18:29 ` Grant Likely
2011-09-09 8:50 ` Dave Martin
2011-09-09 12:59 ` Shawn Guo
2011-09-09 11:48 ` Shawn Guo
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