Unverified Commit 0cf470c0 authored by Wallace Lin's avatar Wallace Lin Committed by Mark Brown
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ASoC: nau8821: add new widget to control system clock 



Add new widget to control system clock for power saving.

Signed-off-by: default avatarWallace Lin <savagecin0@gmail.com>
Signed-off-by: default avatarWallace Lin <sjlin0@nuvoton.com>
Link: https://lore.kernel.org/r/20220719084047.11572-1-savagecin@gmail.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 0caf1120

sound/soc/codecs/nau8821.c

+30 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 


static int nau8821_configure_sysclk(struct nau8821 *nau8821,

	int clk_id, unsigned int freq);

static bool nau8821_is_jack_inserted(struct regmap *regmap);



struct nau8821_fll {

	int mclk_src;
@@ -495,7 +496,33 @@ static int nau8821_output_dac_event(struct snd_soc_dapm_widget *w, 
	return 0;

}



static int system_clock_control(struct snd_soc_dapm_widget *w,

				struct snd_kcontrol *k, int  event)

{

	struct snd_soc_component *component =

		snd_soc_dapm_to_component(w->dapm);

	struct nau8821 *nau8821 = snd_soc_component_get_drvdata(component);



	if (SND_SOC_DAPM_EVENT_OFF(event)) {

		dev_dbg(nau8821->dev, "system clock control : POWER OFF\n");

		/* Set clock source to disable or internal clock before the

		 * playback or capture end. Codec needs clock for Jack

		 * detection and button press if jack inserted; otherwise,

		 * the clock should be closed.

		 */

		if (nau8821_is_jack_inserted(nau8821->regmap)) {

			nau8821_configure_sysclk(nau8821,

				NAU8821_CLK_INTERNAL, 0);

		} else {

			nau8821_configure_sysclk(nau8821, NAU8821_CLK_DIS, 0);

		}

	}

	return 0;

}



static const struct snd_soc_dapm_widget nau8821_dapm_widgets[] = {

	SND_SOC_DAPM_SUPPLY("System Clock", SND_SOC_NOPM, 0, 0,

		system_clock_control, SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_SUPPLY("MICBIAS", NAU8821_R74_MIC_BIAS,

		NAU8821_MICBIAS_POWERUP_SFT, 0, NULL, 0),

	SND_SOC_DAPM_SUPPLY("DMIC Clock", SND_SOC_NOPM, 0, 0,
@@ -607,6 +634,9 @@ static const struct snd_soc_dapm_route nau8821_dapm_routes[] = { 
	{"AIFTX", NULL, "ADCL Digital path"},

	{"AIFTX", NULL, "ADCR Digital path"},



	{"AIFTX", NULL, "System Clock"},

	{"AIFRX", NULL, "System Clock"},



	{"DDACL", NULL, "AIFRX"},

	{"DDACR", NULL, "AIFRX"},