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@xxxxxxxxxxxxxxx> > --- > 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@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
