ASoC: cpcap: Implement .set_bias_level

With VAUDIO regulator being always on, we have to put it in low-power mode
when codec is not in use to decrease power usage.

Do so by implementing driver .set_bias_level callback.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Link: https://patch.msgid.link/20250122164129.807247-3-ivo.g.dimitrov.75@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/cpcap.c b/sound/soc/codecs/cpcap.c
index 04304a7ad9153d1fb68185031f3ab0b091d4e905..53f549ede6a6f90750040bebb5f0d229a461f41a 100644 (file)
--- a/sound/soc/codecs/cpcap.c
+++ b/sound/soc/codecs/cpcap.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/regmap.h>
 #include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
 #include <linux/mfd/motorola-cpcap.h>
 #include <sound/core.h>
 #include <sound/soc.h>
@@ -260,6 +261,7 @@ struct cpcap_audio {
        int codec_clk_id;
        int codec_freq;
        int codec_format;
+       struct regulator *vaudio;
 };
 
 static int cpcap_st_workaround(struct snd_soc_dapm_widget *w,
@@ -1637,6 +1639,11 @@ static int cpcap_soc_probe(struct snd_soc_component *component)
        snd_soc_component_set_drvdata(component, cpcap);
        cpcap->component = component;
 
+       cpcap->vaudio = devm_regulator_get(component->dev, "VAUDIO");
+       if (IS_ERR(cpcap->vaudio))
+               return dev_err_probe(component->dev, PTR_ERR(cpcap->vaudio),
+                                    "Cannot get VAUDIO regulator\n");
+
        cpcap->regmap = dev_get_regmap(component->dev->parent, NULL);
        if (!cpcap->regmap)
                return -ENODEV;
@@ -1649,6 +1656,27 @@ static int cpcap_soc_probe(struct snd_soc_component *component)
        return cpcap_audio_reset(component, false);
 }
 
+static int cpcap_set_bias_level(struct snd_soc_component *component,
+               enum snd_soc_bias_level level)
+{
+       struct cpcap_audio *cpcap = snd_soc_component_get_drvdata(component);
+
+       switch (level) {
+       case SND_SOC_BIAS_OFF:
+               break;
+       case SND_SOC_BIAS_PREPARE:
+               regulator_set_mode(cpcap->vaudio, REGULATOR_MODE_NORMAL);
+               break;
+       case SND_SOC_BIAS_STANDBY:
+               regulator_set_mode(cpcap->vaudio, REGULATOR_MODE_STANDBY);
+               break;
+       case SND_SOC_BIAS_ON:
+               break;
+       }
+
+       return 0;
+}
+
 static const struct snd_soc_component_driver soc_codec_dev_cpcap = {
        .probe                  = cpcap_soc_probe,
        .controls               = cpcap_snd_controls,
@@ -1657,6 +1685,7 @@ static const struct snd_soc_component_driver soc_codec_dev_cpcap = {
        .num_dapm_widgets       = ARRAY_SIZE(cpcap_dapm_widgets),
        .dapm_routes            = intercon,
        .num_dapm_routes        = ARRAY_SIZE(intercon),
+       .set_bias_level         = cpcap_set_bias_level,
        .idle_bias_on           = 1,
        .use_pmdown_time        = 1,
        .endianness             = 1,