From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752715AbaEOOhc (ORCPT ); Thu, 15 May 2014 10:37:32 -0400 Received: from mga01.intel.com ([192.55.52.88]:58061 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754786AbaEOOha (ORCPT ); Thu, 15 May 2014 10:37:30 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,1059,1389772800"; d="scan'208";a="539603732" From: Mika Westerberg To: Wolfram Sang Cc: Yao Jin , Aubrey Li , Mika Westerberg , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] i2c: designware: Disable device on system suspend Date: Thu, 15 May 2014 17:37:22 +0300 Message-Id: <1400164644-3222-3-git-send-email-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.0.0.rc2 In-Reply-To: <1400164644-3222-1-git-send-email-mika.westerberg@linux.intel.com> References: <1400164644-3222-1-git-send-email-mika.westerberg@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Userspace can initiate system suspend on arbitrary times which means that device drivers must make sure that their device gets quiesced before system suspend is entered. Therefore disable the I2C host controller in the driver system suspend hook. Signed-off-by: Mika Westerberg --- drivers/i2c/busses/i2c-designware-platdrv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 9c7802614342..f72102f389c5 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -253,6 +253,7 @@ static int dw_i2c_suspend(struct device *dev) struct platform_device *pdev = to_platform_device(dev); struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); + i2c_dw_disable(i_dev); clk_disable_unprepare(i_dev->clk); return 0; -- 2.0.0.rc2