On Tue, 2020-11-03 at 16:14 +0200, Adrian Hunter wrote: > DeepSleep is a UFS v3.1 feature that achieves the lowest power consumption > of the device, apart from power off. > > In DeepSleep mode, no commands are accepted, and the only way to exit is > using a hardware reset or power cycle. > > This patch assumes that if a power cycle was an option, then power off > would be preferable, so only exit via a hardware reset is supported. > > Drivers that wish to support DeepSleep need to set a new capability flag > UFSHCD_CAP_DEEPSLEEP and provide a hardware reset via the existing > ->device_reset() callback. > > It is assumed that UFS devices with wspecversion >= 0x310 support > DeepSleep. > > Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Reviewed-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
