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Date: Mon, 28 Dec 2015 23:41:53 +0800 From: "Fu, Zhonghui" <zhonghui.fu@...ux.intel.com> To: Ulf Hansson <ulf.hansson@...aro.org> Cc: Adrian Hunter <adrian.hunter@...el.com>, michele.curti@...il.com, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, linux-mmc <linux-mmc@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: [PATCH 2/2] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously 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 sdhci-acpi devices to suspend/resume asynchronously. This will take advantage of multicore and improve system suspend/resume speed. After enabling the sdhci-acpi devices and all their child devices to suspend/resume asynchronously on ASUS T100TA, the system suspend-to-idle time is reduced from 1645ms to 1089ms, and the system resume time is reduced from 940ms to 908ms. Signed-off-by: Zhonghui Fu <zhonghui.fu@...ux.intel.com> --- drivers/mmc/host/sdhci-acpi.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index f6047fc..3d27f2d 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -388,6 +388,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev) pm_runtime_enable(dev); } + device_enable_async_suspend(dev); + return 0; err_free: -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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