From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_RHS_DOB, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7470AC35672 for ; Sat, 22 Feb 2020 11:34:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B63E206EF for ; Sat, 22 Feb 2020 11:34:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726763AbgBVLeB (ORCPT ); Sat, 22 Feb 2020 06:34:01 -0500 Received: from sauhun.de ([88.99.104.3]:53062 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726821AbgBVLeB (ORCPT ); Sat, 22 Feb 2020 06:34:01 -0500 Received: from localhost (p5486C6B7.dip0.t-ipconnect.de [84.134.198.183]) by pokefinder.org (Postfix) with ESMTPSA id 4BB2A2C07F9; Sat, 22 Feb 2020 12:33:59 +0100 (CET) Date: Sat, 22 Feb 2020 12:33:58 +0100 From: Wolfram Sang To: Codrin Ciubotariu Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kamel.bouhara@bootlin.com, Nicolas.Ferre@microchip.com, alexandre.belloni@bootlin.com, Ludovic.Desroches@microchip.com, robh@kernel.org, peda@axentia.se, linux@armlinux.org.uk Subject: Re: [PATCH v3 2/6] i2c: at91: implement i2c bus recovery Message-ID: <20200222113358.GB1716@kunai> References: <20200115115422.17097-1-codrin.ciubotariu@microchip.com> <20200115115422.17097-3-codrin.ciubotariu@microchip.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="+g7M9IMkV8truYOl" Content-Disposition: inline In-Reply-To: <20200115115422.17097-3-codrin.ciubotariu@microchip.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org --+g7M9IMkV8truYOl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jan 15, 2020 at 01:54:18PM +0200, Codrin Ciubotariu wrote: > From: Kamel Bouhara >=20 > Implement i2c bus recovery when slaves devices might hold SDA low. > In this case re-assign SCL/SDA to gpios and issue 9 dummy clock pulses > until the slave release SDA. >=20 > Signed-off-by: Kamel Bouhara > Signed-off-by: Codrin Ciubotariu Applied to for-next, thanks! The implementation is very similar to i2c-imx. Maybe we should move this mechanism into the core somewhen... --+g7M9IMkV8truYOl Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl5REaYACgkQFA3kzBSg Kbb/5BAAjIRoPQE9LABWbJpndp9jLdUzU84jFgAC8Doa8diKtDq4FRlalY3b3N+D ciV1rCm+jDxHbvrtSkzoB4zzqVwoHbCYG2UqCDeb6kGQW+64oCn2PaRGETahlzTt t6xJGm/VCwYNoDOTlp6M27TWtP89PAIc2byd6YgejLdkPld5gfYatdWT5WIv4zci ayDRoh7drxaSKT3umNfixWaafLSLnrVP4ylTA+2FZ2mgp9luw6y6scnSj0Yyk0do elir7QNRItWLYJdtEI5oo2Jfm8wII5P0V3MMS9RWK3diOheswZBdJuX7mEMHXHLz 7hqFRGpkW9U0/7kXfFaLBQWJFAANZeoNHVKg7MyA9rIbRwAqrngy6uVwZD1KPtxn DIYRKZotx/PNmOOaZEMGuwwU70vM9ff0b/ZOYQtYBTzwYDDirXO/ZGipUFLyfaIl sfvCQB6FNb8f8qQpOip20ecYjorUP4duRY2kK0ZTvfqJQTyQi7ziRPLVSB1ukNv+ LG8jlj0RyWojDK/jl0lTUW4mbncWkqBMhWigd5nIJp5qAGRZLfCjKW+xhGos7CNc AJAYLMyGhVazIidpUhju9zqqsTMNXVLwbmwqXd76TmK4hhneqjJqN+uRndSiZNY8 EfnrgyJ6mdYSBxh6MhBZ6fw/s1FplEMs1SR5aOMN1LzGdYIoQg0= =BEk4 -----END PGP SIGNATURE----- --+g7M9IMkV8truYOl--