mmc: sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously
authorFu, Zhonghui <zhonghui.fu@linux.intel.com>
Fri, 22 Jan 2016 04:35:26 +0000 (12:35 +0800)
committerUlf Hansson <ulf.hansson@linaro.org>
Mon, 29 Feb 2016 10:02:52 +0000 (11:02 +0100)
This patch enables sdhci-acpi devices to suspend/resume asynchronously.
This will 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@linux.intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
drivers/mmc/host/sdhci-acpi.c

index a5cda92..195ff08 100644 (file)
@@ -418,6 +418,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
                pm_runtime_enable(dev);
        }
 
+       device_enable_async_suspend(dev);
+
        return 0;
 
 err_free: