From mboxrd@z Thu Jan  1 00:00:00 1970
From: LW@KARO-electronics.de (=?utf-8?Q?Lothar_Wa=C3=9Fmann?=)
Date: Mon, 23 Sep 2013 15:40:18 +0200
Subject: [PATCHv5] staging/iio/adc: change the MXS touchscreen driver
 implementation
In-Reply-To: <201309231524.38008.jbe@pengutronix.de>
References: <1379593369-22010-1-git-send-email-jbe@pengutronix.de>
 <201309231235.56309.jbe@pengutronix.de>
 <21056.12306.714098.398250@ipc1.ka-ro>
 <201309231524.38008.jbe@pengutronix.de>
Message-ID: <21056.17602.24566.144289@ipc1.ka-ro>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi,

J?rgen Beisert writes:
> The i.MX28 manual says the LRADC delay unit is driven by a 2 kHz clock, but 
> does not say what kind of clock it is (or is derived from). I guess now, this 
> clock isn't enabled and thus the delay unit can't work. At least on the 
> MX28EVK. On your TX28 platform the clock seems enabled and the delay unit can 
> do its job and drive the state machine.
>
The i.MX28 Ref Manual states in chapter 38.5.14 LRADC Scheduling Delay:
| This counter operates on a 2KHz clock derived from crystal clock.
Thus the clock should always be enabled.


Lothar Wa?mann
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