Re: [PATCH v2 2/2] regulator: rpi-panel-v2: Add required vcc-supply support

[Dave Stevenson]

Hi Shashank and Marek

On Mon, 7 Sept 2026 at 07:12, Marek Vasut <marek.vasut@xxxxxxxxxxx> wrote:
>
> On 9/7/26 7:46 AM, Shashank Maurya wrote:
> > The Raspberry Pi 7" touchscreen panel V2 MCU requires an external power
> > rail to be enabled before any I2C register access is attempted. Use
> > devm_regulator_get() to obtain the vcc supply and enable it at the
> > start of probe.
> Which power rail is this ?

It'll be the 3.3V rail on the FFC which is used for the MCU, touch
controller, and LCD controller.
The separate 5V supply on the V2 panels is only used for the backlight.

  Dave