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.
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