Message-ID: <53D2174B.4020403@aksignal.cz>
Date: Fri, 25 Jul 2014 10:37:31 +0200
From: =?UTF-8?B?SmnFmcOtIFByY2hhbA==?= <jiri.prchal@aksignal.cz>
Reply-To: jiri.prchal@aksignal.cz
Organization: AK signal Brno
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To: Alexandre Belloni <alexandre.belloni@free-electrons.com>
CC: Boris BREZILLON <boris.brezillon@free-electrons.com>,
        devicetree@vger.kernel.org, nicolas.ferre@atmel.com,
        linux-arm-kernel@lists.infradead.org, Bo Shen <voice.shen@atmel.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM: at91: at91sam9x5: sets NPCS0 (PA14) back to GPIO
References: <1405074175-22444-1-git-send-email-voice.shen@atmel.com> <53D10C50.50305@aksignal.cz> <20140724162645.4e19c26c@bbrezillon> <53D12103.3020103@aksignal.cz> <20140724175848.44f5da10@bbrezillon> <53D1F5D0.1080006@aksignal.cz> <20140725083053.GD9532@piout.net>
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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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