Re: [PATCH 2/4] ARM: ep93xx: keypad: stop using mach/platform.h

Arnd Bergmann
2019-04-15T19:47:49Z

On Mon, Apr 15, 2019 at 9:39 PM Hartley Sweeten
<HartleyS@visionengravers.com> wrote:
>
> On Monday, April 15, 2019 12:25 PM, Arnd Bergmann wrote:
> > We can communicate the clock rate using platform data rather than setting a
> > flag to use a particular value in the driver, which is cleaner and avoids the dependency.
> >
> > No platform in the kernel currently defines the ep93xx keypad device structure, so this
> > is a rather pointless excercise. Any out of tree users are probably dead now, but if not,
> > they have to change their platform code to match the new platform_data structure.
>
> <snip>
>
> > diff --git a/include/linux/platform_data/keypad-ep93xx.h b/include/linux/platform_data/keypad-ep93xx.h
> > index 0e36818e3680..3054fced8509 100644
> > --- a/include/linux/platform_data/keypad-ep93xx.h
> > +++ b/include/linux/platform_data/keypad-ep93xx.h
> > @@ -9,8 +9,7 @@ struct matrix_keymap_data;
> > #define EP93XX_KEYPAD_DIAG_MODE (1<<1) /* diagnostic mode */
> > #define EP93XX_KEYPAD_BACK_DRIVE (1<<2) /* back driving mode */
> > #define EP93XX_KEYPAD_TEST_MODE (1<<3) /* scan only column 0 */
> > -#define EP93XX_KEYPAD_KDIV (1<<4) /* 1/4 clock or 1/16 clock */
> > -#define EP93XX_KEYPAD_AUTOREPEAT (1<<5) /* enable key autorepeat */
> > +#define EP93XX_KEYPAD_AUTOREPEAT (1<<4) /* enable key autorepeat */
>
> You have re-defined the keypad register bits here.
>
> The KDIV bit changes the clock rate. The AUTOREPEAT bit enables key autorepeat.

As far as I can tell, they are not register bits, just software flags
for communicating between a board file and the driver, so I
assumed I could freely reorganize them.

Did I miss something?

Arnd