From: frank agius <ftagius@yahoo.com>
Cc: linux-omap@vger.kernel.org
Subject: Re: ADC timeout on Overo
Date: Wed, 07 Jan 2009 07:17:19 -0500 [thread overview]
Message-ID: <49649D4F.5070903@yahoo.com> (raw)
In-Reply-To: <gje3o3$gmr$1@ger.gmane.org>
Frank Agius wrote:
> Further debug shows that in the module initialization
> routine twl4030_madc_set_power, as soon as the MADC is powered on by
> setting CTRL1[0] MADCON bit to 1, the BUSY bit of CTRL_SW1 turns on and
> never turns off. I'm guessing this constant state of busy is why the
> conversion never completes.
I'm still having the same problem with the conversion never completing,
but my initial debug analysis was wrong. The BUSY bit does not turn on
when power is applied. BUSY turns on when the conversion is started.
The conversion never completes (BUSY never turns off). BUSY can only be
reset with a power cycle (removing and reinserting the driver does not
clear BUSY).
Im trying to understand if this is a driver problem or something
specific to the Overo. Can anyone with one of the boards that has
support enabled for the twl4030 driver (EVM2, EVM3, LDP and
2340/3430sdp)confirm the status of ADC on that board? If it's
functional, what is the Linux revision of the working driver?
regards,
frank
next prev parent reply other threads:[~2009-01-07 12:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-30 21:29 ADC timeout on Overo Frank Agius
2009-01-07 12:17 ` frank agius [this message]
2009-01-13 21:31 ` Frank Agius
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