[alsa-devel] [PATCH] ASoC: nau8825: reduce standby power consumption

[Mark Brown]

On Tue, Mar 22, 2016 at 11:57:05AM +0800, John Hsu wrote:

> @@ -1116,6 +1116,9 @@ static int nau8825_configure_sysclk(struct nau8825 *nau8825, int clk_id,
>  		regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
>  			NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_MCLK);
>  		regmap_update_bits(regmap, NAU8825_REG_FLL6, NAU8825_DCO_EN, 0);
> +		/* MCLK not changed by clock tree */
> +		regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
> +			NAU8825_CLK_MCLK_SRC_MASK, 0);

I'm going to apply this since I suspect there are already similar
assumptions in the code but it does look like the issues Ben raised with
one of your other patches with confusing sysclk management and overall
device power might apply here.  We can't rely on people changing the
clock configuration in lower power modes.
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