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

Jiří Prchal
2014-07-25T08:37:41Z

Dne 25.7.2014 v 10:30 Alexandre Belloni napsal(a):
> Hi,
>
> On 25/07/2014 at 08:14:40 +0200, Jiří Prchal wrote :
>> I'm using custom board. My spi node:
>> spi0: spi@f0000000 {
>
> You should override the pinctrl here as you are using gpios for the cs.
> pinctrl-0 = <&pinctrl_spi0_custom>;
>
>> status = "okay";
>> cs-gpios = <&pioA 23 0
>> &pioA 22 0
>> &pioC 29 0
>> &pioA 14 0>;
>>
>
> pinctrl@fffff400 {
> spi0 {
> pinctrl_spi0_custom: spi0-custom {
> atmel,pins =
> <AT91_PIOA 23 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>,
> <AT91_PIOA 22 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>,
> <AT91_PIOC 29 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>,
> <AT91_PIOA 14 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
> };
> };
> };
>
Of course, it's the way, but in all other drivers, for example LEDS, it's not needed. And in other way, if I will not
use PA14 at all, the pin will goes down every spi transfer.