lkml.org 
[lkml]   [2014]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v4 7/9] devicetree: bindings: Document PM8921/8058 keypads
On Fri, Feb 28, 2014 at 10:37:08AM -0800, Stephen Boyd wrote:
> On 02/28, Josh Cartwright wrote:
> > On Thu, Feb 27, 2014 at 05:55:18PM -0800, Stephen Boyd wrote:
> > > +
> > > +EXAMPLE
> > > +
> > > + keypad {
> > > + compatible = "qcom,pm8921-keypad";
> > > + interrupt-parent = <&pmicintc>;
> > > + interrupts = <74 1>, <75 1>;
> > > + linux,keymap = <
> > > + MATRIX_KEY(0, 0, KEY_VOLUMEUP)
> > > + MATRIX_KEY(0, 1, KEY_VOLUMEDOWN)
> > > + MATRIX_KEY(0, 2, KEY_CAMERA_FOCUS)
> > > + MATRIX_KEY(0, 3, KEY_CAMERA)
> > > + >;
> > > + keypad,num-rows = <1>;
> > > + keypad,num-columns = <5>;
> > > + debounce = <15>;
> > > + scan-delay = <32>;
> > > + row-hold = <91500>;
> > > + };
> >
> > It odd to me that these newly created bindings don't have 'reg'
> > properties, even though the device clearly has a register region.
> >
> > I suppose it makes sense from a "port over from platform data to DT"
> > perspective, as these drivers have just assumed the location of their
> > registers to be fixed; however I suspect things will need to be changed
> > if/when we hope to share these drivers with pm8841/pm8941 and beyond...
> >
>
> Agreed. I would love it if the platform OF code would create
> IORESOURCE_REG resources for any reg properties that aren't
> translatable to CPU addresses. That way we don't have to pick out the
> reg property from DT with special OF code (like you've done in
> rtc-pm8xxx).

Yes, I agree this would be nice. The rtc-pm8xxx register parsing magic
is misplaced/ugly. I'll see about taking a crack at this and seeing
what it looks like.

> I'll throw the reg property into the binding so that in
> the future we can support the register moving around (although at the
> moment the driver will ignore it).

Great, I think this sounds good.

--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation


\
 
 \ /
  Last update: 2014-02-28 21:01    [W:0.060 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site