Hi,
Thanks for your comments :)
On Sat, 25 Apr 2015 13:50:25 +0100
Charles Keepax <ckee...@opensource.wolfsonmicro.com> wrote:
> On Wed, Apr 22, 2015 at 08:23:20PM +0900, Inha Song wrote:
> > This patch add support for select accessory detect mode to HPDETL or HPDETR.
> > Arizona provides a headphone detection circuit on the HPDETL and HPDETR pins
> > to measure the impedance of an external load connected to the headphone.
> >
> > Depending on board design, headphone detect pins can change to HPDETR or
> > HPDETL.
> >
> > Signed-off-by: Inha Song <ideal.s...@samsung.com>
> > ---
> >
> > +static int arizona_extcon_of_get_pdata(struct arizona *arizona)
> > +{
> > + struct arizona_pdata *pdata = &arizona->pdata;
> > + unsigned int val;
>
> I would rather this is "unsigned int val =
> ARIZONA_ACCDET_MODE_HPL;".
>
> > +
> > + of_property_read_u32(arizona->dev->of_node, "wlf,hpdet-channel", &val);
>
> Because this won't fill val if the DT entry isn't present.
>
> > + switch (val) {
>
> Which means we hit this with val uninitialised.
>
> > + case ARIZONA_ACCDET_MODE_HPL:
> > + case ARIZONA_ACCDET_MODE_HPR:
>
> So we may select either channel at random.
Opps, Ok, I will set the default value to ARIZONA_ACCDET_MODE_HPL.
>
> > + pdata->hpdet_channel = val;
> > + break;
> > + default:
> > + dev_err(arizona->dev,
> > + "Wrong wlf,hpdet-channel DT value %d\n", val);
>
> Or most likely just print an error but the DT being missing
> shouldn't really be an error it is an optional entry.
If the default value is set to ARIZONA_ACCDET_MODE_HPL,
Only the print will be shown, when an invalid value is set by DT.
So, This is a resonable error message.
Best Regards,
Inha Song.
>
> > + pdata->hpdet_channel = ARIZONA_ACCDET_MODE_HPL;
> > + }
> > +
> > + return 0;
> > +}
>
> Thanks,
> Charles
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