Re: [alsa-devel] [PATCH 07/21] ASoC: io: Prevent use of regmap if request fails

On 26/07/12 16:25, Mark Brown wrote:

On Thu, Jul 26, 2012 at 04:23:33PM +0100, Lee Jones wrote:

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What's my 'control data'? It's not used in the original codec patch.

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The old way wants to go:

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snd_soc_update_bits() -> snd_soc_read() -> ab8500_codec_read_reg()

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When then calls back into the abx500.

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So what 'control data' should I be storing in the codec struct?

You're supposed to use it for the data you use to call back into the underlying I/O code.

I don't understand. What 'data'?

Surely if .read and .write are populated in 'struct snd_soc_codec_driver', then it should just call back into those?