ASoC: rt5663: Add regulator support

Add regulator support to turn on cpvdd and avdd in probe.
If a regulator is not given from device tree, a dummy regulator will be
used.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5663.c

@@ -17,6 +17,7 @@
 #include <linux/platform_device.h>
 #include <linux/spi/spi.h>
 #include <linux/acpi.h>
+#include <linux/regulator/consumer.h>
 #include <linux/workqueue.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -33,6 +34,9 @@
 #define RT5663_DEVICE_ID_2 0x6451
 #define RT5663_DEVICE_ID_1 0x6406
 
+#define RT5663_POWER_ON_DELAY_MS 300
+#define RT5663_SUPPLY_CURRENT_UA 500000
+
 enum {
 	CODEC_VER_1,
 	CODEC_VER_0,
@@ -48,6 +52,11 @@ struct impedance_mapping_table {
 	unsigned int dc_offset_r_manual_mic;
 };
 
+static const char *const rt5663_supply_names[] = {
+	"avdd",
+	"cpvdd",
+};
+
 struct rt5663_priv {
 	struct snd_soc_component *component;
 	struct rt5663_platform_data pdata;
@@ -56,6 +65,7 @@ struct rt5663_priv {
 	struct snd_soc_jack *hs_jack;
 	struct timer_list btn_check_timer;
 	struct impedance_mapping_table *imp_table;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(rt5663_supply_names)];
 
 	int codec_ver;
 	int sysclk;
@@ -3483,7 +3493,7 @@ static int rt5663_i2c_probe(struct i2c_client *i2c,
 {
 	struct rt5663_platform_data *pdata = dev_get_platdata(&i2c->dev);
 	struct rt5663_priv *rt5663;
-	int ret;
+	int ret, i;
 	unsigned int val;
 	struct regmap *regmap;
 
@@ -3500,6 +3510,37 @@ static int rt5663_i2c_probe(struct i2c_client *i2c,
 	else
 		rt5663_parse_dp(rt5663, &i2c->dev);
 
+	for (i = 0; i < ARRAY_SIZE(rt5663->supplies); i++)
+		rt5663->supplies[i].supply = rt5663_supply_names[i];
+
+	ret = devm_regulator_bulk_get(&i2c->dev,
+				      ARRAY_SIZE(rt5663->supplies),
+				      rt5663->supplies);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
+		return ret;
+	}
+
+	/* Set load for regulator. */
+	for (i = 0; i < ARRAY_SIZE(rt5663->supplies); i++) {
+		ret = regulator_set_load(rt5663->supplies[i].consumer,
+					 RT5663_SUPPLY_CURRENT_UA);
+		if (ret) {
+			dev_err(&i2c->dev,
+				"Failed to set regulator %s, ret: %d\n",
+				rt5663->supplies[i].supply, ret);
+		}
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(rt5663->supplies),
+				    rt5663->supplies);
+
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+	msleep(RT5663_POWER_ON_DELAY_MS);
+
 	regmap = devm_regmap_init_i2c(i2c, &temp_regmap);
 	if (IS_ERR(regmap)) {
 		ret = PTR_ERR(regmap);
@@ -3530,7 +3571,8 @@ static int rt5663_i2c_probe(struct i2c_client *i2c,
 		dev_err(&i2c->dev,
 			"Device with ID register %#x is not rt5663\n",
 			val);
-		return -ENODEV;
+		ret = -ENODEV;
+		goto err_enable;
 	}
 
 	if (IS_ERR(rt5663->regmap)) {
@@ -3635,20 +3677,30 @@ static int rt5663_i2c_probe(struct i2c_client *i2c,
 		ret = request_irq(i2c->irq, rt5663_irq,
 			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING
 			| IRQF_ONESHOT, "rt5663", rt5663);
-		if (ret)
+		if (ret) {
 			dev_err(&i2c->dev, "%s Failed to reguest IRQ: %d\n",
 				__func__, ret);
+			goto err_enable;
+		}
 	}
 
 	ret = devm_snd_soc_register_component(&i2c->dev,
 			&soc_component_dev_rt5663,
 			rt5663_dai, ARRAY_SIZE(rt5663_dai));
 
-	if (ret) {
+	if (ret)
-		if (i2c->irq)
+		goto err_irq;
-			free_irq(i2c->irq, rt5663);
-	}
 
+	return 0;
+
+err_irq:
+	if (i2c->irq)
+		free_irq(i2c->irq, rt5663);
+
+err_enable:
+	dev_err(&i2c->dev,
+		"%s: Disable regulator after probe error\n", __func__);
+	regulator_bulk_disable(ARRAY_SIZE(rt5663->supplies), rt5663->supplies);
 	return ret;
 }
 
@@ -3659,6 +3711,8 @@ static int rt5663_i2c_remove(struct i2c_client *i2c)
 	if (i2c->irq)
 		free_irq(i2c->irq, rt5663);
 
+	regulator_bulk_disable(ARRAY_SIZE(rt5663->supplies), rt5663->supplies);
+
 	return 0;
 }