[PATCH 1/2] pinctrl: sunxi: Remove non existing irq's

[Linus Walleij]

On Mon, Feb 29, 2016 at 6:13 AM, Henry Paulissen <henry at nitronetworks.nl> wrote:

> While I was testing irq's on the cubietruck I found a couple of
> not working irq pins. Further diving into the problem it opened
> up a mess called "manual".
>
> This so called manual (A20 user manual v1.3 dated 2014-10-10) says:
>
> Pin overview:
>     Page 233:       EINT12 is on pin PC19 mux6.
>     Page 236:       EINT12 is on pin PH12 mux6.
>
> Now, it is a bit strange to have the same IRQ on 2 different pins,
> but I guess this could still be possible hardware wise. But then:
>
> Pin registers:
>     Page 253:       EINT12 is *not* on pin PC19.
>     Page 281:       EINT12 is on pin PH12.
>
> The manual is so contradicting that further tests had to be made
> to see which of the 2 statements where correct.
>
> This patch is based on actual outcome of these tests and not what
> the manual says.
>
> Test procedure used:
>
> Connect a 1 pulse per second (GPS) line to the pin.
>
> echo pin### > /sys/class/gpio/export
> echo in > /sys/class/gpio/gpio###/direction
> echo rising > /sys/class/gpio/gpio###/edge
>
> Check /proc/interrupts if a irq was attached and if irq's where
> received.
>
> Signed-off-by: Henry Paulissen <henry at nitronetworks.nl>

Patch applied with Maxime's ACK.

Yours,
Linus Walleij