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

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Date:	Fri, 25 Jul 2014 10:45:53 +0200
From:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
To:	jiri.prchal@...ignal.cz
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

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




-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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