[PATCH 2/4] regulator: core: notify regulator enable with the voltage value

[jay.xu at rock-chips.com]

Hi, Mark
--------------
jay.xu at rock-chips.com
>On Mon, Aug 16, 2021 at 11:20:01AM +0800, Jianqun Xu wrote:
>
>> +	ret = _regulator_get_voltage(rdev);
>> +	if (ret < 0)
>> +	ret = 0;
>> +
>>  _notifier_call_chain(rdev, REGULATOR_EVENT_ENABLE,
>> -	     NULL);
>> +	     &ret);
>
>This is going to be really expensive for devices without a cache and
>it's going to be *very* rarely used if ever. 

How about to only to notify the EVENT_ENABLE without get voltage, then driver who care about this event
could get the voltage itself ?