From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756558AbbIXGuh (ORCPT ); Thu, 24 Sep 2015 02:50:37 -0400 Received: from mga14.intel.com ([192.55.52.115]:45339 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752478AbbIXGuf (ORCPT ); Thu, 24 Sep 2015 02:50:35 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,579,1437462000"; d="scan'208";a="567480859" Message-ID: <56039D22.8020907@linux.intel.com> Date: Thu, 24 Sep 2015 14:50:10 +0800 From: "Fu, Zhonghui" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: wsa@the-dreams.de CC: linux-i2c@vger.kernel.org, "linux-kernel@vger.kernel.org" Subject: [PATCH v2] i2c: enable i2c adapter to suspend/resume asynchronously Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now, PM core supports asynchronous suspend/resume mode for devices during system suspend/resume, and the power state transition of one device may be completed in separate kernel thread. PM core ensures all power state transition timing dependency between devices. This patch enables i2c adapter to suspend/resume asynchronously. This will take advantage of multicore and improve system suspend/resume speed. Signed-off-by: Zhonghui Fu --- Changes in v2: - Amend commit message. drivers/i2c/i2c-core.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 5f89f1e..c273b55 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1528,6 +1528,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap) pm_runtime_no_callbacks(&adap->dev); + device_enable_async_suspend(&adap->dev); + #ifdef CONFIG_I2C_COMPAT res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev, adap->dev.parent); -- 1.7.1