Zybo Z7 board - fix MIO init issue

[Luis Araneda]

Hi Michal,

On Tue, Jan 14, 2020 at 5:49 AM Michal Simek <monstr at monstr.eu> wrote:
>
> +Luis
>
> čt 9. 1. 2020 v 14:00 odesílatel Milan Obuch <u-boot at dino.sk> napsal:
> >
> > Zybo Z7 board has two push button connected to MIO pins 50 and 51,
> > connecting them to Vcc1V8 when pressed, and pulldown resistors
> > connected to ground. These two pins are initialised with internal
> > pullup resistors enabled, so they are reported as 1 all the time with
> > no change when pressed.
> >
> > @@ -219,8 +219,8 @@
> >         EMIT_MASKWRITE(0xF80007BC, 0x00003F01U, 0x00001201U),
> >         EMIT_MASKWRITE(0xF80007C0, 0x00003FFFU, 0x000012E0U),
> >         EMIT_MASKWRITE(0xF80007C4, 0x00003FFFU, 0x000012E1U),
> > -       EMIT_MASKWRITE(0xF80007C8, 0x00003FFFU, 0x00001200U),
> > -       EMIT_MASKWRITE(0xF80007CC, 0x00003FFFU, 0x00001200U),
> > +       EMIT_MASKWRITE(0xF80007C8, 0x00003FFFU, 0x00000200U),
> > +       EMIT_MASKWRITE(0xF80007CC, 0x00003FFFU, 0x00000200U),
> >         EMIT_MASKWRITE(0xF80007D0, 0x00003FFFU, 0x00001280U),
> >         EMIT_MASKWRITE(0xF80007D4, 0x00003FFFU, 0x00001280U),
> >         EMIT_MASKWRITE(0xF8000830, 0x003F003FU, 0x002F0037U),
>
> Luis: Can you please comment?
>
> I have not a problem with this patch but please send it as regular patch.
> git format-patch and then git send-email or use u-boot patman tools
> for sending it.

I successfully tested the patch on a Zybo Z7-20 board.
The push buttons are now handled correctly.

Tested with the command "gpio status -a"
When the push buttons are not pressed:
> gpio at e000a00050: input: 0 [ ]
> gpio at e000a00051: input: 0 [ ]

When the push buttons are pressed:
> gpio at e000a00050: input: 1 [ ]
> gpio at e000a00051: input: 1 [ ]

Once the commit is in shape to be merged, feel free to add my Tested-by tag.

Tested-by: Luis Araneda <luaraneda at gmail.com>

Please ping me if the author does not want to send a proper git patch
so I can send it instead.
I don't want this work to be lost.

Regards,
Luis Araneda.