Re: [PATCH 5/8] mfd: Add ST's Low Power Controller driver

From: Lee Jones
Date: Mon Dec 15 2014 - 09:39:12 EST

On Mon, 15 Dec 2014, Arnd Bergmann wrote:

> On Monday 15 December 2014 13:50:52 Lee Jones wrote:
> > > >
> > >
> > > I don't think it's necessary to have the MFD node if only one of the
> > > two modes can be used based on a DT property. It should be enough
> > > to have both the rtc and the wdt driver list the same compatible
> > > string and check the property in the probe function to decide if
> > > they want to drive the device or not:
> >
> > I tried that and it didn't work. Only one driver probed.
> >
> >
> Strange, the code in really_probe() and the comment in device_attach()
> suggest that this is not the intentional behavior. What error
> code did you return? If it's -ENODEV or -ENXIO, it should keep
> trying the other drivers, otherwise it will give up.

Oh I see. So if I return -ENODEV it will keep trying to bind with
other drivers. I'll try that and report back.

Lee Jones
Linaro STMicroelectronics Landing Team Lead â Open source software for ARM SoCs
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