From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Simek Subject: Re: [PATCH] net/macb: fix ISR clear-on-write behavior only for some SoC Date: Tue, 04 Jun 2013 09:57:24 +0200 Message-ID: <51AD9DE4.7070907@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> <20130604064940.GA5107@pengutronix.de> <51AD9C94.4080606@atmel.com> Reply-To: monstr@monstr.eu Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="----enig2EKHFDFQHOCEKUGKDCVSM" Cc: Steffen Trumtrar , Jean-Christophe PLAGNIOL-VILLARD , Hein Tibosch , netdev@vger.kernel.org, michal.simek@xilinx.com, linux-kernel@vger.kernel.org, Ludovic Desroches , linux-arm-kernel@lists.infradead.org, =?ISO-8859-1?Q?S=F6ren_Brinkmann?= To: Nicolas Ferre Return-path: In-Reply-To: <51AD9C94.4080606@atmel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) ------enig2EKHFDFQHOCEKUGKDCVSM Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 06/04/2013 09:51 AM, Nicolas Ferre wrote: > On 04/06/2013 08:49, Steffen Trumtrar : >> 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 a= lways >>>>>>> implemented when using Cadence MACB/GEM and is breaking other pla= tforms. >>>>>>> We are using a new Device Tree compatibility string and a capabil= ity >>>>>>> property to actually activate this clear-on-write behavior on ISR= =2E >>>>>>> >>>>>>> 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 revi= sion >>>>> 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= >=20 > Even more: already in Linus' tree! Ah I see. v2 is in thunderbird in the same thread and I didn't check this= version for compatible string. Thanks, Michal --=20 Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91 w: www.monstr.eu p: +42-0-721842854 Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/ Maintainer of Linux kernel - Xilinx Zynq ARM architecture Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform ------enig2EKHFDFQHOCEKUGKDCVSM Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlGtneQACgkQykllyylKDCHQqwCghnvM2+i5sMOA13K9unWDOupu EFgAoJFhjkUJtxG9SG3BUplOs6aF6R3I =PVh7 -----END PGP SIGNATURE----- ------enig2EKHFDFQHOCEKUGKDCVSM--