[PATCH 3/5] drm/bridge: Add PTN3460 bridge driver

[Olof Johansson]

On Thu, Oct 3, 2013 at 10:39 AM, Inki Dae <inki.dae at samsung.com> wrote:
> 2013/10/3 Sean Paul <seanpaul at chromium.org>:
>> On Thu, Oct 3, 2013 at 9:55 AM, Inki Dae <inki.dae at samsung.com> wrote:
>>> Can a regulator be used instead of gpio in other board case?
>>>
>>
>> No, not to my knowledge.
>>
>
> Hm.. plz check it out again. the gpio pin is specific to board, and
> the the gpio be used as power source trigger could be replaced with a
> regulator according to board design. So you should consider all
> possibilities even though there are no other cases yet: other board
> could  use a regulator instead.

Take a look at the data sheet, it is publicly available.

PD_N is not a power supply input, so modelling it as a regulator makes no sense:

"If PD_N is LOW, then the device is in Deep power-down completely,
even if supply rail is ON; for the device to be able to operate, the
PD_N pin must be HIGH."



-Olof