From mboxrd@z Thu Jan 1 00:00:00 1970 From: s.trumtrar@pengutronix.de (Steffen Trumtrar) Date: Tue, 4 Jun 2013 08:49:40 +0200 Subject: [PATCH] net/macb: fix ISR clear-on-write behavior only for some SoC In-Reply-To: <51AD8611.8070102@monstr.eu> References: <1368461105-23128-1-git-send-email-nicolas.ferre@atmel.com> <51918C23.7040106@yahoo.es> <20130514055256.GD22508@game.jcrosoft.org> <51AD8611.8070102@monstr.eu> Message-ID: <20130604064940.GA5107@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jun 04, 2013 at 08:15:45AM +0200, Michal Simek wrote: > On 05/14/2013 07:52 AM, Jean-Christophe PLAGNIOL-VILLARD wrote: > > On 08:58 Tue 14 May , Hein Tibosch wrote: > >> On 5/14/2013 12:05 AM, Jean-Christophe PLAGNIOL-VILLARD wrote: > >>> On May 14, 2013, at 12:05 AM, Nicolas Ferre wrote: > >>> > >>>> Commit 749a2b6 (net/macb: clear tx/rx completion flags in ISR) > >>>> introduces clear-on-write on ISR register. This behavior is not always > >>>> implemented when using Cadence MACB/GEM and is breaking other platforms. > >>>> We are using a new Device Tree compatibility string and a capability > >>>> property to actually activate this clear-on-write behavior on ISR. > >>>> > >>>> Reported-by: Hein Tibosch > >>>> Signed-off-by: Nicolas Ferre > >>> can we detect it via the IP? > >> > >> This was my first proposal, have it based on the value of MACB's > >> register 'MID' (offset 0x00fc, lower 16 bits). > >> On avr32 it reads: 0x0000010D, on Zynq it reports 0x00000119 > >> > >> So for the moment, CAPS_ISR_CLEAR_ON_WRITE could be set if the revision > >> equals to 0x00000119? > > so no it will not work > > > > as the gem on sama5 is 00020119 > > > > so version 0x119 too > > > > nico > > Acked-by: Jean-Christophe PLAGNIOL-VILLARD > > Was this added to any queue or branch? > I would like to enable macb for zynq and not sure if "cdns,zynq-7000-gem" > compatible string goes to mainline. > Hi! This is already in next, but you can use the default compatible as the DCR1 is used instead of DT binding. Regards, Steffen -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |