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 <[email protected]>
---
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
On 4 December 2015 at 14:05, Fu, Zhonghui <[email protected]> wrote:
> 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 <[email protected]>
Thanks, applied for next!
Kind regards
Uffe
> ---
> 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
>
> --
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