diff options
| author | Fu, Zhonghui <zhonghui.fu@linux.intel.com> | 2015-12-04 21:05:56 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-12-22 11:32:16 +0100 |
| commit | ec076cd226c3d93565ede082a240e23b5090e36c (patch) | |
| tree | 026021002f507e52d19245d7a53c59fcdf75e800 /drivers/mmc/core/bus.c | |
| parent | 5c671c410c8704800f4f1673b6f572137e7e6ddd (diff) | |
mmc: enable MMC/SD/SDIO 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 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 <zhonghui.fu@linux.intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/bus.c')
| -rw-r--r-- | drivers/mmc/core/bus.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 972ff844cf5a..4bc48f10452f 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; |