Re: [PATCH 2/4] OMAP4: TWL: Add common omapdss supplies

Tomi Valkeinen
2011-09-02T07:30:50Z

On Fri, 2011-09-02 at 12:10 +0530, Archit Taneja wrote:
> Hi,
>
> On Monday 22 August 2011 01:56 PM, Valkeinen, Tomi wrote:
> > OMAP DSS normally gets power from VCXIO on OMAP4. Add configuration
> for
> > this into twl-common.c
> >
> > Mark VCXIO as always_on, as VCXIO is used by multiple components,
> > including the MPU, and turning it off when DSS doesn't need it would
> > lead the device to halt.
>
> I had a query. Is this the right place to set always_on to true?
> Won't
> this lead to VCXIO being always on all omap4 boards? Is it necessary
> that VCXIO will be used to power on MPU for all omap4 boards?

I don't really know, but TRM's 27.2.1 Power Requirements chapter shows
vcxio connected to multiple places. It's an example, but I would guess
it is the common setup, thus setting it to always on in twl-common.c
sounds ok.

If there will be an omap4 board with different setup, then we need to
revisit this.

Tomi