From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH] ASoC: tpa6130a2: Revisit power-up sequence Date: Mon, 8 Nov 2010 11:36:52 +0000 Message-ID: <20101108113652.GD21834@rakim.wolfsonmicro.main> References: <1289206677-11886-1-git-send-email-jhnikula@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from opensource2.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 82B402441C for ; Mon, 8 Nov 2010 12:36:53 +0100 (CET) Content-Disposition: inline In-Reply-To: <1289206677-11886-1-git-send-email-jhnikula@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Jarkko Nikula Cc: alsa-devel@alsa-project.org, Peter Ujfalusi , Liam Girdwood List-Id: alsa-devel@alsa-project.org On Mon, Nov 08, 2010 at 10:57:57AM +0200, 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 > Cc: Peter Ujfalusi Acked-by: Mark Brown