On Fri, Oct 18, 2019 at 5:42 PM Arnd Bergmann [off-list ref] wrote:

The mach/mfp.h header is only used by this one driver
for hardcoded gpio numbers. Change that to use a lookup
table instead.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

(...)

+               GPIO_LOOKUP("gpio-pxa", mfp_to_gpio(MFP_PIN_GPIO15),
+                           "touch", GPIO_ACTIVE_LOW),

What I tried to do with code like this, when I was ambitious,
was to wind out mfp_to_gpio() as well and either just encode
the offset on gpio-pxa as a define locally.

But this works too, the kernel looks better after than before
and I am not perfectionist, so:
Acked-by: Linus Walleij <redacted>

Yours,
Linus Walleij