Commit 22d22ee5 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Clean up WM8731 bias level configuration 



The WM8731 bias level configuration function was written slightly
obscurely - streamline the code a little and refresh the comments.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 7b317b69

sound/soc/codecs/wm8731.c

+3 −5
Original line number Diff line number Diff line
@@ -396,21 +396,19 @@ static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 
static int wm8731_set_bias_level(struct snd_soc_codec *codec,

				 enum snd_soc_bias_level level)

{

	u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;

	u16 reg;



	switch (level) {

	case SND_SOC_BIAS_ON:

		/* vref/mid, osc on, dac unmute */

		wm8731_write(codec, WM8731_PWR, reg);

		break;

	case SND_SOC_BIAS_PREPARE:

		break;

	case SND_SOC_BIAS_STANDBY:

		/* everything off except vref/vmid, */

		/* Clear PWROFF, gate CLKOUT, everything else as-is */

		reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;

		wm8731_write(codec, WM8731_PWR, reg | 0x0040);

		break;

	case SND_SOC_BIAS_OFF:

		/* everything off, dac mute, inactive */

		wm8731_write(codec, WM8731_ACTIVE, 0x0);

		wm8731_write(codec, WM8731_PWR, 0xffff);

		break;

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