[RFC 3/5] regulator: core: Only apply constraints if available on list voltage
Javier Martinez Canillas
javier.martinez at collabora.co.uk
Wed Jul 30 01:49:25 PDT 2014
Hello Mark, thanks a lot for all your feedback.
On 07/29/2014 07:18 PM, Mark Brown wrote:
> On Tue, Jul 29, 2014 at 06:28:57PM +0200, Javier Martinez Canillas wrote:
>>
>> But for load switches that don't define a voltage output, the parent
>> supply voltage is used so the constraints should only be applied if
>> they were defined for the child regulators.
>
> No, think about what you're doing here and why we're filtering out
> unsettable voltages - this causes problems for consumers on regulators
> that don't have any ability to vary voltages since they will now be able
> to list voltages that they can't select.
>
Understood. Thanks for the explanation.
> I would also expect any regulator where the supplied devices are able to
> vary the voltage to explicitly provide a constraint even if the
> implementation is done in a parent regulator. There may be constraints
> on the child supply which aren't directly present on the parent supply
> and can be ignored if the child supply is turned off.
>
Agreed, if I explicitly set the voltage constraints on the child supply then
this patch is indeed not needed.
Best regards,
Javier
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