From: Ivaylo Dimitrov ivo.g.dimitrov.75@gmail.com
[ Upstream commit 5b4288792ff246cf2bda0c81cebcc02d1f631ca3 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/cpcap.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/sound/soc/codecs/cpcap.c b/sound/soc/codecs/cpcap.c index 04304a7ad9153..53f549ede6a6f 100644 --- 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,