Re: [PATCH] ARM: at91: at91sam9x5: sets NPCS0 (PA14) back to GPIO

Jiří Prchal
2014-07-25T10:06:57Z

Dne 25.7.2014 v 11:31 Boris BREZILLON napsal(a):
> On Fri, 25 Jul 2014 11:13:51 +0200
> Jiří Prchal <jiri.prchal@aksignal.cz> wrote:
>
>
>>>
>>> Every thing seems in place.
>>> Could you enable CONFIG_DEBUG_PINCTRL and grep on "enable pin" ?
>> / # dmesg | grep "enable pin"
>> [ 0.968750] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 101 as GPIO
>> [ 0.968750] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 101 as PIOD5 0x20
>> [ 0.968750] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 100 as GPIO
>> [ 0.968750] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 100 as PIOD4 0x10
>> [ 1.238281] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 23 as GPIO
>> [ 1.238281] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 23 as PIOA23 0x800000
>> [ 1.238281] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 22 as GPIO
>> [ 1.238281] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 22 as PIOA22 0x400000
>> [ 1.242187] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 93 as GPIO
>> [ 1.242187] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 93 as PIOC29 0x20000000
>> [ 1.246093] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 14 as GPIO
>> [ 1.246093] pinctrl-at91 ahb:apb:pinctrl@fffff400: enable pin 14 as PIOA14 0x4000
>
>
> Okay, this cleary shows that PA14 pin is muxed as a GPIO (or at least
> the driver think it is).
>
>
> Could you launch these commands (you'll need the devmem tool) and
> paste the results ?
>
> #devmem 0xfffff408
> #devmem 0xfffff418
> #devmem 0xfffff438
> #devmem 0xfffff43c
> #devmem 0xfffff458
> #devmem 0xfffff468
> #devmem 0xfffff470
> #devmem 0xfffff474
> #devmem 0xfffff498
>
/ # devmem 0xfffff408
0xF0E04018
/ # devmem 0xfffff418
0xE0C04000
/ # devmem 0xfffff438
0x00C04000
/ # devmem 0xfffff43c
0x13FFD7FB
/ # devmem 0xfffff458
0x00000000
/ # devmem 0xfffff468
0xFF223B4E
/ # devmem 0xfffff470
0x0F000000
/ # devmem 0xfffff474
0x00000000
/ # devmem 0xfffff498
0xFFFFFFFF

I get thought if is possible that in time of probe fm25 (it's first) is not configured PA14 (it 's last)?