Re: Applied "regulator: wm8994: Pass descriptor instead of GPIO number" to the regulator tree

[Richard Fitzgerald]

On 20/11/18 15:56, Marek Szyprowski wrote:
> Hi Charles,
>
> On 2018-11-20 16:36, Charles Keepax wrote:
> > On Tue, Nov 20, 2018 at 03:32:15PM +0000, Charles Keepax wrote:
> > > On Tue, Nov 20, 2018 at 03:58:59PM +0100, Marek Szyprowski wrote:
> > > > On 2018-11-20 15:47, Charles Keepax wrote:
> > > > > On Tue, Nov 20, 2018 at 02:43:32PM +0100, Marek Szyprowski wrote:
> > > > > > On 2018-05-17 18:41, Mark Brown wrote:
> > > > > > > Subject: [PATCH] regulator: wm8994: Pass descriptor instead of GPIO number
> > > > > > This patch causes following kernel warning on Samsung Exynos4412 based
> > > > > > Trats2 board:
> > > > > >
> > > > > > wm8994 4-001a: Failed to get supply 'DBVDD1': -517
> > > > > > wm8994 4-001a: Failed to get supplies: -517
> > > This is really weird, because the error in your log relates to
> > > DBVDD1 which is an independent regulator supplied by a separate
> > > regulator. I am really having some difficulty seeing how the
> > > patch interfers. It is definitely that patch which causes the
> > > issue, like you revert it and things work again?
> > Wait does the board still boot just you have an extra probe defer
> > now? Or does it actually fail?
>
> The board boots fine. The only new thing is the mentioned warning, which
> I would
>
> like to have fixed.
>
>
> Best regards

-517 is EPROBE_DEFER. This isn't something  that needs "fixing" unless the
driver is never able to probe.

If the wm8994 eventually probes ok after retries it's not a problem,
it's normal kernel behaviour.

If the wm8994 driver never manages to probe successfully it should mean that
the driver which supplies DBVDD1 isn't available.