diff options
| author | Fu, Zhonghui <zhonghui.fu@linux.intel.com> | 2015-12-04 13:05:56 (GMT) |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-12-22 10:32:16 (GMT) |
| commit | ec076cd226c3d93565ede082a240e23b5090e36c (patch) | |
| tree | 026021002f507e52d19245d7a53c59fcdf75e800 /drivers/mmc | |
| parent | 5c671c410c8704800f4f1673b6f572137e7e6ddd (diff) | |
| download | linux-ec076cd226c3d93565ede082a240e23b5090e36c.tar.xz | |
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')
| -rw-r--r-- | drivers/mmc/core/bus.c | 2 | ||||
| -rw-r--r-- | 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); |