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

Boris BREZILLON
2014-07-25T09:31:16Z

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

--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering