[alsa-devel] [PATCH] ASoC: cs42888: Add codec driver support

Austin, Brian Brian.Austin at cirrus.com
Mon Feb 24 16:52:24 CET 2014

>> +	/* Disable auto-mute */
>> +	regmap_update_bits(cs42888->regmap, CS42888_TXCTL,
>> +			   CS42888_TXCTL_AMUTE | CS42888_TXCTL_DAC_SZC_MASK,
>> +			   CS42888_TXCTL_DAC_SZC_SR);
> Does this interfere with the manual mute controls or is it a separate
> thing?  If it plays nicely with the manual controls it's probably better
> to leave it enabled since it improves performance in some benchmarks
> (that's why hardware tends to have the feature).

Auto-Mute should be enabled by default.

>> +	if (!IS_ERR(cs42888->clk))
>> +		clk_disable_unprepare(cs42888->clk);
> Does the device work without MCLK?
Yes, MCLK is required. If you can’t get the clock you should error out.

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