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authorDaniel Mack <daniel@zonque.org>2018-10-03 21:34:36 +0200
committerMark Brown <broonie@kernel.org>2018-10-08 12:25:57 +0200
commit7454a21c13f7ce9bf1a4f9b639039b78462cec09 (patch)
tree073d2c518e218d1fe41a22921dd011f6ae7d6cf1 /sound
parentASoC: Add device tree documentation file for wm8782 stereo DAC (diff)
downloadlinux-7454a21c13f7ce9bf1a4f9b639039b78462cec09.tar.xz
linux-7454a21c13f7ce9bf1a4f9b639039b78462cec09.zip
ASoC: wm8782: add support for regulators
Lookup regulators for Vdd and Vdda during probe, and enable them when the component is linked. Signed-off-by: Daniel Mack <daniel@zonque.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/wm8782.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8782.c b/sound/soc/codecs/wm8782.c
index 317db9a149a7..cf2cdbece122 100644
--- a/sound/soc/codecs/wm8782.c
+++ b/sound/soc/codecs/wm8782.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
+#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
@@ -50,7 +51,51 @@ static struct snd_soc_dai_driver wm8782_dai = {
},
};
+/* regulator power supply names */
+static const char *supply_names[] = {
+ "Vdda", /* analog supply, 2.7V - 3.6V */
+ "Vdd", /* digital supply, 2.7V - 5.5V */
+};
+
+struct wm8782_priv {
+ struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
+};
+
+static int wm8782_soc_probe(struct snd_soc_component *component)
+{
+ struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
+ return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+}
+
+static void wm8782_soc_remove(struct snd_soc_component *component)
+{
+ struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
+ regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+}
+
+#ifdef CONFIG_PM
+static int wm8782_soc_suspend(struct snd_soc_component *component)
+{
+ struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
+ regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+ return 0;
+}
+
+static int wm8782_soc_resume(struct snd_soc_component *component)
+{
+ struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
+ return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+}
+#else
+#define wm8782_soc_suspend NULL
+#define wm8782_soc_resume NULL
+#endif /* CONFIG_PM */
+
static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
+ .probe = wm8782_soc_probe,
+ .remove = wm8782_soc_remove,
+ .suspend = wm8782_soc_suspend,
+ .resume = wm8782_soc_resume,
.dapm_widgets = wm8782_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets),
.dapm_routes = wm8782_dapm_routes,
@@ -63,6 +108,24 @@ static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
static int wm8782_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
+ struct wm8782_priv *priv;
+ int ret, i;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+
+ for (i = 0; i < ARRAY_SIZE(supply_names); i++)
+ priv->supplies[i].supply = supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
+ priv->supplies);
+ if (ret < 0)
+ return ret;
+
return devm_snd_soc_register_component(&pdev->dev,
&soc_component_dev_wm8782, &wm8782_dai, 1);
}