From: Peter Ujfalusi <peter.ujfalusi@nokia.com>
To: ext Jarkko Nikula <jhnikula@gmail.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
Liam Girdwood <lrg@slimlogic.co.uk>
Subject: Re: [PATCH] ASoC: tpa6130a2: Revisit power-up sequence
Date: Mon, 8 Nov 2010 11:38:13 +0200 [thread overview]
Message-ID: <201011081138.13288.peter.ujfalusi@nokia.com> (raw)
In-Reply-To: <1289206677-11886-1-git-send-email-jhnikula@gmail.com>
On Monday 08 November 2010 10:57:57 ext Jarkko Nikula wrote:
> There are no known problems with current power-up sequence which first sets
> the /shutdown pin high and then enables the supply. However, swap the order
> so that the device is kept in shutdown/reset mode during the supply voltage
> transition since slowly rising voltages can usually cause problems if the
> device is not kept in reset.
>
> Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
> Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Yes, it is safer to keep the amp in reset during voltage ramp.
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
next prev parent reply other threads:[~2010-11-08 9:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-08 8:57 [PATCH] ASoC: tpa6130a2: Revisit power-up sequence Jarkko Nikula
2010-11-08 9:38 ` Peter Ujfalusi [this message]
2010-11-08 11:36 ` Mark Brown
2010-11-09 21:39 ` Liam Girdwood
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