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From: "Tim Sander" <tim.sander@hbm.com>
To: "Eric Bénard" <eric@eukrea.com>
Cc: barebox@lists.infradead.org
Subject: Re: GPIO Support on pcm043
Date: Fri, 20 May 2011 15:30:19 +0200	[thread overview]
Message-ID: <201105201530.20237.tim.sander@hbm.com> (raw)
In-Reply-To: <4DD66946.4050906@eukrea.com>

Hi Eric

Thanks for your answer
> > Is there some obvious error on my side or is there no gpio
> > support for pcm043? At least there seems to be support for
> > the gpio ports on imx?
> > Any hints?
> 
> you first need to configure the mux of the pins to GPIO mode, then you can
> use them as gpio.
After tripping into that trap multiple times, i've already checked that, but
forgot to mention it:
static struct pad_desc pcm043_pads[] = {
	...
        MX35_PAD_D3_CLS__GPIO1_4,
        MX35_PAD_D3_SPL__GPIO1_5,
	...

These should be the gpio nrs 4 and 5 which means that
gpio_set_direction 4 1
or
gpio_set_direction 4 0
should light up the led.

The led is working under linux so it's some problem with the gpio setup.

Thanks
Tim

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  reply	other threads:[~2011-05-20 13:30 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-20 12:07 Tim Sander
2011-05-20 13:14 ` Eric Bénard
2011-05-20 13:30   ` Tim Sander [this message]
2011-05-20 13:34     ` Eric Bénard
2011-05-20 14:16       ` Eric Bénard
2011-05-23  7:12     ` Sascha Hauer
2011-05-23 10:20       ` Tim Sander
2011-05-23  7:06 ` Sascha Hauer

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