Re: [PATCH] regulator: rpi-panel-v2: Add optional vcc-supply support

[Shashank Maurya]

On Wed, Sep 02, 2026 at 04:48:33PM +0100, Mark Brown wrote:
> On Mon, Aug 31, 2026 at 11:44:08AM +0530, Shashank Maurya wrote:
> > On Fri, Aug 28, 2026 at 01:13:42PM +0100, Mark Brown wrote:
> > > On Fri, Aug 28, 2026 at 09:59:43AM +0530, Shashank Maurya wrote:
> 
> > > > The Raspberry Pi Panel V2 regulator driver may rely on an external
> > > > power rail being provided through the device tree. Add support for an
> > > > optional "vcc" regulator and enable it during probe before accessing
> > > > the panel controller.
> 
> > > Does the device work without power?  A name like "Vcc" makes it sound
> > > like this is the main supply for the device...
> 
> > No without VCC, regulator will not be up. So device will not work if
> > power rail is software controlled and  not always high.
> 
> That doesn't sound very optional then.

Apologies I missed below discussion over the list.
>> Yes Mark, this isn't optional on qualcomm boards. But it might be optional
>> for boards where power up logic is hardware controlled or always high.

>That's not how regulators work - with regulators the driver is
>independent of the specific system it runs on, the machine constraints
>deal with any system specifics.

>Please don't take things off-list unless there is a really strong reason
>to do so.  Sending things to the list ensures that everyone gets a
>chance to read and comment on things.

Going forward, I'll make vcc sipply compulsory then.