Unverified Commit 6133148c authored by David Lin's avatar David Lin Committed by Mark Brown
Browse files

ASoC: nau8825: add clock management for power saving 



Adjust dapm widget to manage clock from power event for power saving.

Signed-off-by: default avatarDavid Lin <CTLIN0@nuvoton.com>
Signed-off-by: default avatarMac Chiang <mac.chiang@intel.com>
Link: https://lore.kernel.org/r/20211025113857.3860951-3-CTLIN0@nuvoton.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c6167e10

sound/soc/codecs/nau8825.c

+33 −2
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ 


static int nau8825_configure_sysclk(struct nau8825 *nau8825,

		int clk_id, unsigned int freq);

static bool nau8825_is_jack_inserted(struct regmap *regmap);



struct nau8825_fll {

	int mclk_src;
@@ -981,6 +982,31 @@ static int nau8825_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 nau8825 *nau8825 = snd_soc_component_get_drvdata(component);

	struct regmap *regmap = nau8825->regmap;



	if (SND_SOC_DAPM_EVENT_OFF(event)) {

		dev_dbg(nau8825->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 (nau8825_is_jack_inserted(regmap)) {

			nau8825_configure_sysclk(nau8825,

						 NAU8825_CLK_INTERNAL, 0);

		} else {

			nau8825_configure_sysclk(nau8825, NAU8825_CLK_DIS, 0);

		}

	}



	return 0;

}



static int nau8825_biq_coeff_get(struct snd_kcontrol *kcontrol,

				     struct snd_ctl_elem_value *ucontrol)

{
@@ -1094,6 +1120,9 @@ static const struct snd_kcontrol_new nau8825_dacr_mux = 
static const struct snd_soc_dapm_widget nau8825_dapm_widgets[] = {

	SND_SOC_DAPM_AIF_OUT("AIFTX", "Capture", 0, NAU8825_REG_I2S_PCM_CTRL2,

		15, 1),

	SND_SOC_DAPM_AIF_IN("AIFRX", "Playback", 0, SND_SOC_NOPM, 0, 0),

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

			    system_clock_control, SND_SOC_DAPM_POST_PMD),



	SND_SOC_DAPM_INPUT("MIC"),

	SND_SOC_DAPM_MICBIAS("MICBIAS", NAU8825_REG_MIC_BIAS, 8, 0),
@@ -1182,9 +1211,11 @@ static const struct snd_soc_dapm_route nau8825_dapm_routes[] = { 
	{"ADC", NULL, "ADC Clock"},

	{"ADC", NULL, "ADC Power"},

	{"AIFTX", NULL, "ADC"},

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



	{"DDACL", NULL, "Playback"},

	{"DDACR", NULL, "Playback"},

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

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

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

	{"DDACL", NULL, "DDAC Clock"},

	{"DDACR", NULL, "DDAC Clock"},

	{"DACL Mux", "DACL", "DDACL"},