From owner-svn-src-all@freebsd.org Sun Nov 3 21:13:00 2019 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AC5911A313B; Sun, 3 Nov 2019 21:13:00 +0000 (UTC) (envelope-from wulf@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 475pYS3kc8z4WCW; Sun, 3 Nov 2019 21:13:00 +0000 (UTC) (envelope-from wulf@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 64D0219D3E; Sun, 3 Nov 2019 21:13:00 +0000 (UTC) (envelope-from wulf@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id xA3LD0Db077728; Sun, 3 Nov 2019 21:13:00 GMT (envelope-from wulf@FreeBSD.org) Received: (from wulf@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id xA3LD0FU077727; Sun, 3 Nov 2019 21:13:00 GMT (envelope-from wulf@FreeBSD.org) Message-Id: <201911032113.xA3LD0FU077727@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: wulf set sender to wulf@FreeBSD.org using -f From: Vladimir Kondratyev Date: Sun, 3 Nov 2019 21:13:00 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r354317 - head/sys/dev/ichiic X-SVN-Group: head X-SVN-Commit-Author: wulf X-SVN-Commit-Paths: head/sys/dev/ichiic X-SVN-Commit-Revision: 354317 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Nov 2019 21:13:00 -0000 Author: wulf Date: Sun Nov 3 21:12:59 2019 New Revision: 354317 URL: https://svnweb.freebsd.org/changeset/base/354317 Log: [ig4] wait for bus stop condition after stop command issued It gives better error detection and ig4 driver's lock coverage in a pipelined write case Modified: head/sys/dev/ichiic/ig4_iic.c Modified: head/sys/dev/ichiic/ig4_iic.c ============================================================================== --- head/sys/dev/ichiic/ig4_iic.c Sun Nov 3 21:10:47 2019 (r354316) +++ head/sys/dev/ichiic/ig4_iic.c Sun Nov 3 21:12:59 2019 (r354317) @@ -362,7 +362,8 @@ ig4iic_xfer_start(ig4iic_softc_t *sc, uint16_t slave, if (!repeated_start) { /* - * Clear any previous TX/RX FIFOs overflow/underflow bits. + * Clear any previous TX/RX FIFOs overflow/underflow bits + * and I2C bus STOP condition. */ reg_read(sc, IG4_REG_CLR_INTR); } @@ -613,6 +614,13 @@ ig4iic_transfer(device_t dev, struct iic_msg *msgs, ui else error = ig4iic_write(sc, msgs[i].buf, msgs[i].len, rpstart, stop); + + /* Wait for error or stop condition occurred on the I2C bus */ + if (stop && error == 0) { + error = wait_intr(sc, IG4_INTR_STOP_DET); + if (error == 0) + reg_read(sc, IG4_REG_CLR_INTR); + } if (error != 0) { /*