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

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Date:	Fri, 25 Jul 2014 11:13:51 +0200
From:	Jiří Prchal <jiri.prchal@...ignal.cz>
To:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
CC:	Bo Shen <voice.shen@...el.com>, nicolas.ferre@...el.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH] ARM: at91: at91sam9x5: sets NPCS0 (PA14) back to GPIO



Dne 25.7.2014 v 11:01 Boris BREZILLON napsal(a):
> On Fri, 25 Jul 2014 10:54:23 +0200
> Jiří Prchal <jiri.prchal@...ignal.cz> wrote:
>
>> Here it is:
>> cat /sys/kernel/debug/gpio
>> GPIOs 0-31, platform/fffff400.gpio, fffff400.gpio:
>> [in20] GPIOfffff400.gpio3: [gpio] set
>> [spi0.3] GPIOfffff400.gpio14: [gpio] set
>> [in19] GPIOfffff400.gpio21: [gpio] set
>> [spi0.1] GPIOfffff400.gpio22: [gpio] set
>> [spi0.0] GPIOfffff400.gpio23: [gpio] set
>> [in18] GPIOfffff400.gpio28: [gpio] set
>> [out20] GPIOfffff400.gpio29: [gpio] clear
>> [out18] GPIOfffff400.gpio30: [gpio] clear
>> [out19] GPIOfffff400.gpio31: [gpio] clear
>>
>> GPIOs 32-50, platform/fffff600.gpio, fffff600.gpio:
>> [blue] GPIOfffff600.gpio12: [gpio] set
>> [gsm_on] GPIOfffff600.gpio13: [gpio] clear
>> [yellow] GPIOfffff600.gpio14: [gpio] clear
>> [gsm_rst] GPIOfffff600.gpio15: [gpio] clear
>> [green] GPIOfffff600.gpio16: [gpio] clear
>> [red] GPIOfffff600.gpio18: [gpio] clear
>>
>> GPIOs 64-95, platform/fffff800.gpio, fffff800.gpio:
>> [in17] GPIOfffff800.gpio16: [gpio] set
>> [in13] GPIOfffff800.gpio18: [gpio] set
>> [in14] GPIOfffff800.gpio20: [gpio] set
>> [por] GPIOfffff800.gpio25: [gpio] clear
>> [out16] GPIOfffff800.gpio26: [gpio] clear
>> [out15] GPIOfffff800.gpio28: [gpio] clear
>> [spi0.2] GPIOfffff800.gpio29: [gpio] set
>> [out17] GPIOfffff800.gpio30: [gpio] clear
>>
>> GPIOs 96-117, platform/fffffa00.gpio, fffffa00.gpio:
>> [nand_enable] GPIOfffffa00.gpio4: [gpio] set
>> [nand_rdy] GPIOfffffa00.gpio5: [gpio] set
>> [atmel_usba_udc] GPIOfffffa00.gpio21: [gpio] clear
>>
>
> 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@...ff400: enable pin 101 as GPIO
[    0.968750] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 101 as PIOD5 0x20
[    0.968750] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 100 as GPIO
[    0.968750] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 100 as PIOD4 0x10
[    1.238281] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 23 as GPIO
[    1.238281] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 23 as PIOA23 0x800000
[    1.238281] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 22 as GPIO
[    1.238281] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 22 as PIOA22 0x400000
[    1.242187] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 93 as GPIO
[    1.242187] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 93 as PIOC29 0x20000000
[    1.246093] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 14 as GPIO
[    1.246093] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 14 as PIOA14 0x4000
[    1.652343] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 117 as GPIO
[    1.652343] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 117 as PIOD21 0x200000
[    1.742187] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 50 as GPIO
[    1.742187] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 50 as PIOB18 0x40000
[    1.742187] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 48 as GPIO
[    1.742187] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 48 as PIOB16 0x10000
[    1.746093] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 46 as GPIO
[    1.746093] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 46 as PIOB14 0x4000
[    1.746093] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 44 as GPIO
[    1.746093] pinctrl-at91 ahb:apb:pinctrl@...ff400: enable pin 44 as PIOB12 0x1000

>
>>
>> Dne 25.7.2014 v 10:45 Boris BREZILLON napsal(a):
>>> On Fri, 25 Jul 2014 10:27:13 +0200
>>> Jiří Prchal <jiri.prchal@...ignal.cz> wrote:
>>>
>>> [...]
>>>>
>>>>
>>>>> Could you also paste the content of /sys/kernel/debug/gpio ?
>>>> The /sys/kernel/debug/ is empty.
>>>
>>> You have to enable CONFIG_DEBUG_FS in your config and then mount the
>>> debug file system:
>>>
>>> #mount -t debugfs dbg /sys/kernel/debug
>>>
>>>
>>>
>>>
>
>
>
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