linux-kernel - Re: [PATCH 2/5] ASoC: da7213: Add checking of SRM lock status before enabling DAI

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Message-ID: <20160510182143.GD6261@sirena.org.uk>
Date:	Tue, 10 May 2016 19:21:43 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org,
	Support Opensource <support.opensource@...semi.com>
Subject: Re: [PATCH 2/5] ASoC: da7213: Add checking of SRM lock status before
 enabling DAI

On Tue, May 10, 2016 at 04:11:05PM +0100, Adam Thomson wrote:

> +		/* Slave mode, if SRM not enabled no need for status checks */
> +		pll_ctrl = snd_soc_read(codec, DA7213_PLL_CTRL);
> +		if (!(pll_ctrl & DA7213_PLL_SRM_EN))
> +			return 0;

This isn't going to work, the driver has no volatile registers but it
does have a cache...

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