Re: [PATCH 1/2] input: touchscreen: add driver for Zeitec ZET6223

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On Wed, Feb 01, 2017 at 11:20:53AM -0800, Dmitry Torokhov wrote:
> On Wed, Feb 01, 2017 at 08:10:59PM +0100, Jelle van der Waa wrote:
> > On 01/31/17 at 12:19am, Dmitry Torokhov wrote:
> > > Hi Jelle,
> > > 
> > > On Wed, Jan 18, 2017 at 02:49:46PM -0800, Dmitry Torokhov wrote:
> > > > On Wed, Jan 18, 2017 at 09:57:14PM +0100, Jelle van der Waa wrote:
> > > > > > I also have been looking at you previosu submission and had some draft
> > > > > > changes. I reconciled them in the patch below, if it still works for you
> > > > > > then I'll fold everything together and apply. Please let me know.
> > > > > 
> > > > > I'll find some time to test the patch below, I've one small suggestion
> > > > > to the patch below.
> > > 
> > > It would be very helpful if you let me know if the patch actually works
> > > on the hardware: the merge window for 4.11 will be opening fairly soon.
> > 
> > Sorry, I had a busy week and at first it didn't work since I didn't have
> > a regulator and I think the code for the regular might be wrong.
> > 
> > I think that you want the regulators to be optional, but
> > devm_regulator_get_optional errors out when no vcc/vio is configured.
> > Changing it to devm_regulator_get makes the driver work. I guess this is
> > since devm_regulator_get_optional doesn't allow the creation of a dummy
> > device while devm_regulator_get does.
> 
> Ah, yes, these should have been non-optional. I'll fix it up and apply
> then.

Hmm.. but no, we only acess regulators if they are non-NULL in
zet6223_power_on(). I used devm_regulator_get_optional() to avoid
needless sleep in zet6223_power_on() when we do not have regulators
defined. Let me look some more...

-- 
Dmitry
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