Re: [PATCH 1/2] scsi: ufs: Add DeepSleep feature

[Adrian Hunter]

On 5/10/20 12:51 pm, Avri Altman wrote:
>>
>>
>> On 5/10/20 11:02 am, Avri Altman wrote:
>>> HI,
>>>
>>>> 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.
>>> I would expect that this capability controls sending SSU 4, but it only controls
>> the sysfs entry?
>>
>> The sysfs entry is the only way to request DeepSleep.
> Some chipset vendors use their own modules, or even the device tree
> to set their default rpm_lvl / spm_lvl.

I would not expect them to set it wrongly but what are you suggesting?