From: Patrick <kpa_info@yahoo.fr>
To: barebox@lists.infradead.org
Subject: Re: GPIO commands on OMAP4
Date: Thu, 05 Apr 2012 14:45:43 +0200 [thread overview]
Message-ID: <4F7D93F7.2020505@yahoo.fr> (raw)
In-Reply-To: <4F7D68A1.9000800@yahoo.fr>
On 04/05/2012 11:40 AM, Patrick wrote:
> Dear mailing-list,
>
> I am using a pcm049 phyCORE omap4430 module from Phytec with BareBox
> 2011.09.0 patched with BSP from Phytec.
>
> I would like to use the GPIO command to read a switch at startup. This
> chip is connected on ABE_MCBSP1_DX (gpio_116). I have edited the
> boards/pcm049/mux.c files to change the configuration of this GPIO as
> follow: {ABE_MCBSP1_DX, (DIS | IEN | M3)} instead of {ABE_MCBSP1_DX,
> (SAFE_MODE)}.
>
> I then use the "gpio_get_value 116" command followed by "echo $?" to
> read the value. I always read a 0. On Linux I could read the right value
> depending of the position of the switch, so it's not an hardware problems.
>
> I have tried with one of the two LEDs on the module (gpio_152) and I
> could change the LED state and read it back with gpio_get_value.
>
> I do not understand what I am doing wrong. Any help will be appreciated.
>
> Patrick
>
>
>
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
I have done same test with the latest revision on the pengutronix git
and the results are the same...
Any idea ?
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next prev parent reply other threads:[~2012-04-05 12:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-05 9:40 Patrick
2012-04-05 12:45 ` Patrick [this message]
2012-04-05 13:49 ` Sascha Hauer
2012-04-05 14:38 ` Patrick
2012-04-05 14:58 ` Patrick
2012-04-05 16:19 ` Sascha Hauer
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