linux-kernel - Re: [PATCH 0/2] ASoC: pcm512x: Add knobs to allow and control overclocking

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Message-ID: <20150221093449.GH6236@finisterre.sirena.org.uk>
Date:	Sat, 21 Feb 2015 18:34:49 +0900
From:	Mark Brown <broonie@...nel.org>
To:	Peter Rosin <peda@...ator.liu.se>
Cc:	alsa-devel@...a-project.org, Peter Rosin <peda@...ntia.se>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] ASoC: pcm512x: Add knobs to allow and control
 overclocking

On Mon, Feb 16, 2015 at 10:02:45PM +0100, Peter Rosin wrote:

> Another "feature" that one might want, is that attempts to change the
> overclocking should fail with EBUSY when the device is already in use.
> But I haven't invested enough time to find out how I should determine
> when to fail, so for this version the driver accepts the change but
> doesn't enforce the new limit until the clock rates are recalculated.

You should be able to to check for the bias level being set to ON.

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