ASoC: wm8960: Add support for the power supplies

WM8960 has the following power supplies:

- AVDD
- DBVDD
- DCVDD
- SPKVDD1
- SPKVDD1

Add support for them.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230803215506.142922-2-festevam@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm8960.c

@@ -120,6 +120,15 @@ static bool wm8960_volatile(struct device *dev, unsigned int reg)
 	}
 }
 
+#define WM8960_NUM_SUPPLIES 5
+static const char *wm8960_supply_names[WM8960_NUM_SUPPLIES] = {
+	"DCVDD",
+	"DBVDD",
+	"AVDD",
+	"SPKVDD1",
+	"SPKVDD2",
+};
+
 struct wm8960_priv {
 	struct clk *mclk;
 	struct regmap *regmap;
@@ -137,6 +146,7 @@ struct wm8960_priv {
 	bool is_stream_in_use[2];
 	struct wm8960_data pdata;
 	ktime_t dsch_start;
+	struct regulator_bulk_data supplies[WM8960_NUM_SUPPLIES];
 };
 
 #define wm8960_reset(c)	regmap_write(c, WM8960_RESET, 0)
@@ -1417,6 +1427,7 @@ static int wm8960_i2c_probe(struct i2c_client *i2c)
 {
 	struct wm8960_data *pdata = dev_get_platdata(&i2c->dev);
 	struct wm8960_priv *wm8960;
+	unsigned int i;
 	int ret;
 	u8 val;
 
@@ -1439,6 +1450,23 @@ static int wm8960_i2c_probe(struct i2c_client *i2c)
 		}
 	}
 
+	for (i = 0; i < ARRAY_SIZE(wm8960->supplies); i++)
+		wm8960->supplies[i].supply = wm8960_supply_names[i];
+
+	ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8960->supplies),
+				 wm8960->supplies);
+	if (ret <  0) {
+		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(wm8960->supplies),
+				    wm8960->supplies);
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
 	wm8960->regmap = devm_regmap_init_i2c(i2c, &wm8960_regmap);
 	if (IS_ERR(wm8960->regmap))
 		return PTR_ERR(wm8960->regmap);
@@ -1505,7 +1533,11 @@ static int wm8960_i2c_probe(struct i2c_client *i2c)
 }
 
 static void wm8960_i2c_remove(struct i2c_client *client)
-{}
+{
+	struct wm8960_priv *wm8960 = i2c_get_clientdata(client);
+
+	regulator_bulk_disable(ARRAY_SIZE(wm8960->supplies), wm8960->supplies);
+}
 
 static const struct i2c_device_id wm8960_i2c_id[] = {
 	{ "wm8960", 0 },