ASoC: tlv320aic32x4: Support for regulators
Support regulators to power up the codec. This patch also enables the
AVDD LDO if no AV regulator was found.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index 643fa53..d69c61f 100644
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -34,6 +34,7 @@
#include <linux/cdev.h>
#include <linux/slab.h>
#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
#include <sound/tlv320aic32x4.h>
#include <sound/core.h>
@@ -69,6 +70,11 @@
bool swapdacs;
int rstn_gpio;
struct clk *mclk;
+
+ struct regulator *supply_ldo;
+ struct regulator *supply_iov;
+ struct regulator *supply_dv;
+ struct regulator *supply_av;
};
/* 0dB min, 0.5dB steps */
@@ -695,6 +701,106 @@
return 0;
}
+static void aic32x4_disable_regulators(struct aic32x4_priv *aic32x4)
+{
+ regulator_disable(aic32x4->supply_iov);
+
+ if (!IS_ERR(aic32x4->supply_ldo))
+ regulator_disable(aic32x4->supply_ldo);
+
+ if (!IS_ERR(aic32x4->supply_dv))
+ regulator_disable(aic32x4->supply_dv);
+
+ if (!IS_ERR(aic32x4->supply_av))
+ regulator_disable(aic32x4->supply_av);
+}
+
+static int aic32x4_setup_regulators(struct device *dev,
+ struct aic32x4_priv *aic32x4)
+{
+ int ret = 0;
+
+ aic32x4->supply_ldo = devm_regulator_get_optional(dev, "ldoin");
+ aic32x4->supply_iov = devm_regulator_get(dev, "iov");
+ aic32x4->supply_dv = devm_regulator_get_optional(dev, "dv");
+ aic32x4->supply_av = devm_regulator_get_optional(dev, "av");
+
+ /* Check if the regulator requirements are fulfilled */
+
+ if (IS_ERR(aic32x4->supply_iov)) {
+ dev_err(dev, "Missing supply 'iov'\n");
+ return PTR_ERR(aic32x4->supply_iov);
+ }
+
+ if (IS_ERR(aic32x4->supply_ldo)) {
+ if (PTR_ERR(aic32x4->supply_ldo) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ if (IS_ERR(aic32x4->supply_dv)) {
+ dev_err(dev, "Missing supply 'dv' or 'ldoin'\n");
+ return PTR_ERR(aic32x4->supply_dv);
+ }
+ if (IS_ERR(aic32x4->supply_av)) {
+ dev_err(dev, "Missing supply 'av' or 'ldoin'\n");
+ return PTR_ERR(aic32x4->supply_av);
+ }
+ } else {
+ if (IS_ERR(aic32x4->supply_dv) &&
+ PTR_ERR(aic32x4->supply_dv) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR(aic32x4->supply_av) &&
+ PTR_ERR(aic32x4->supply_av) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ }
+
+ ret = regulator_enable(aic32x4->supply_iov);
+ if (ret) {
+ dev_err(dev, "Failed to enable regulator iov\n");
+ return ret;
+ }
+
+ if (!IS_ERR(aic32x4->supply_ldo)) {
+ ret = regulator_enable(aic32x4->supply_ldo);
+ if (ret) {
+ dev_err(dev, "Failed to enable regulator ldo\n");
+ goto error_ldo;
+ }
+ }
+
+ if (!IS_ERR(aic32x4->supply_dv)) {
+ ret = regulator_enable(aic32x4->supply_dv);
+ if (ret) {
+ dev_err(dev, "Failed to enable regulator dv\n");
+ goto error_dv;
+ }
+ }
+
+ if (!IS_ERR(aic32x4->supply_av)) {
+ ret = regulator_enable(aic32x4->supply_av);
+ if (ret) {
+ dev_err(dev, "Failed to enable regulator av\n");
+ goto error_av;
+ }
+ }
+
+ if (!IS_ERR(aic32x4->supply_ldo) && IS_ERR(aic32x4->supply_av))
+ aic32x4->power_cfg |= AIC32X4_PWR_AIC32X4_LDO_ENABLE;
+
+ return 0;
+
+error_av:
+ if (!IS_ERR(aic32x4->supply_dv))
+ regulator_disable(aic32x4->supply_dv);
+
+error_dv:
+ if (!IS_ERR(aic32x4->supply_ldo))
+ regulator_disable(aic32x4->supply_ldo);
+
+error_ldo:
+ regulator_disable(aic32x4->supply_iov);
+ return ret;
+}
+
static int aic32x4_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -745,13 +851,31 @@
return ret;
}
+ ret = aic32x4_setup_regulators(&i2c->dev, aic32x4);
+ if (ret) {
+ dev_err(&i2c->dev, "Failed to setup regulators\n");
+ return ret;
+ }
+
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_aic32x4, &aic32x4_dai, 1);
- return ret;
+ if (ret) {
+ dev_err(&i2c->dev, "Failed to register codec\n");
+ aic32x4_disable_regulators(aic32x4);
+ return ret;
+ }
+
+ i2c_set_clientdata(i2c, aic32x4);
+
+ return 0;
}
static int aic32x4_i2c_remove(struct i2c_client *client)
{
+ struct aic32x4_priv *aic32x4 = i2c_get_clientdata(client);
+
+ aic32x4_disable_regulators(aic32x4);
+
snd_soc_unregister_codec(&client->dev);
return 0;
}
