Message ID | 567C0401.8000806@linux.intel.com |
---|---|
State | Superseded |
Headers | show |
Hi Wolfram, What do you think about this patch? Thanks, Zhonghui On 12/24/2015 10:41 PM, Fu, Zhonghui 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 i2c devices to suspend/resume asynchronously. This will take > advantage of multicore and improve system suspend/resume speed. After > enabling all i2c devices, i2c adapters and i2c controllers on ASUS > T100TA tablet, the system suspend-to-idle time is reduced to about > 510ms from 750ms, and the system resume time is reduced to about 790ms > from 900ms. > > Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com> > --- > drivers/i2c/i2c-core.c | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c > index ba8eb08..4ff620e 100644 > --- a/drivers/i2c/i2c-core.c > +++ b/drivers/i2c/i2c-core.c > @@ -1072,6 +1072,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) > client->dev.of_node = info->of_node; > client->dev.fwnode = info->fwnode; > > + device_enable_async_suspend(&client->dev); > i2c_dev_set_name(adap, client); > status = device_register(&client->dev); > if (status) > -- 1.7.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index ba8eb08..4ff620e 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1072,6 +1072,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) client->dev.of_node = info->of_node; client->dev.fwnode = info->fwnode; + device_enable_async_suspend(&client->dev); i2c_dev_set_name(adap, client); status = device_register(&client->dev); if (status)
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 i2c devices to suspend/resume asynchronously. This will take advantage of multicore and improve system suspend/resume speed. After enabling all i2c devices, i2c adapters and i2c controllers on ASUS T100TA tablet, the system suspend-to-idle time is reduced to about 510ms from 750ms, and the system resume time is reduced to about 790ms from 900ms. Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com> --- drivers/i2c/i2c-core.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html