From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753154AbbLDNGA (ORCPT ); Fri, 4 Dec 2015 08:06:00 -0500 Received: from mga14.intel.com ([192.55.52.115]:13494 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751441AbbLDNF7 (ORCPT ); Fri, 4 Dec 2015 08:05:59 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,380,1444719600"; d="scan'208";a="612511966" To: Ulf Hansson Cc: Jaehoon Chung , hdegoede@redhat.com, "Wysocki, Rafael J" , s.hauer@pengutronix.de, linux-mmc , "linux-kernel@vger.kernel.org" From: "Fu, Zhonghui" Subject: [PATCH] mmc: enable MMC/SD/SDIO device to suspend/resume asynchronously Message-ID: <56618FB4.3020100@linux.intel.com> Date: Fri, 4 Dec 2015 21:05:56 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 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 dependency between devices. This patch enables MMC/SD/SDIO card and SDIO function devices to suspend/resume asynchronously. This will take advantage of multicore and improve system suspend/resume speed. After applying this patch and enabling all SDIO function's child devices to suspend/resume asynchronously on ASUS T100TA, the system suspend-to-idle time is reduced from 1645ms to 1108ms, and the system resume time is reduced from 940ms to 918ms. Signed-off-by: Zhonghui Fu --- drivers/mmc/core/bus.c | 2 ++ drivers/mmc/core/sdio_bus.c | 1 + 2 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 972ff84..4bc48f1 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -349,6 +349,8 @@ int mmc_add_card(struct mmc_card *card) card->dev.of_node = mmc_of_find_child_device(card->host, 0); + device_enable_async_suspend(&card->dev); + ret = device_add(&card->dev); if (ret) return ret; diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c index 7e327a6..86f5b32 100644 --- a/drivers/mmc/core/sdio_bus.c +++ b/drivers/mmc/core/sdio_bus.c @@ -322,6 +322,7 @@ int sdio_add_func(struct sdio_func *func) sdio_set_of_node(func); sdio_acpi_set_handle(func); + device_enable_async_suspend(&func->dev); ret = device_add(&func->dev); if (ret == 0) sdio_func_set_present(func); -- 1.7.1