From: Wallace Lin <savagecin0@xxxxxxxxx>
Add new widget to control system clock for power saving.
Signed-off-by: Wallace Lin <savagecin0@xxxxxxxxx>
Signed-off-by: Wallace Lin <sjlin0@xxxxxxxxxxx>
---
sound/soc/codecs/nau8821.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/sound/soc/codecs/nau8821.c b/sound/soc/codecs/nau8821.c
index 2600be250a3c..83a17c48d594 100644
--- a/sound/soc/codecs/nau8821.c
+++ b/sound/soc/codecs/nau8821.c
@@ -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"},
--
2.25.1
