media: hi556: Support full range of power rails

Use regulator_bulk_* to get the array of potential power rails for
the hi556.

Previously the driver only supported avdd as only avdd is used on IPU6
designs. But other designs may also need the driver to control the other
power rails and the new INT3472 handshake support also makes use of
dvdd on IPU6 designs.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=2368506
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

Author: jwrdegoede

drivers/media/i2c/hi556.c

@@ -624,6 +624,12 @@ static const struct hi556_mode supported_modes[] = {
 	},
 };
 
+static const char * const hi556_supply_names[] = {
+	"dovdd",	/* Digital I/O power */
+	"avdd",		/* Analog power */
+	"dvdd",		/* Digital core power */
+};
+
 struct hi556 {
 	struct v4l2_subdev sd;
 	struct media_pad pad;
@@ -639,7 +645,7 @@ struct hi556 {
 	/* GPIOs, clocks, etc. */
 	struct gpio_desc *reset_gpio;
 	struct clk *clk;
-	struct regulator *avdd;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(hi556_supply_names)];
 
 	/* Current mode */
 	const struct hi556_mode *cur_mode;
@@ -1289,17 +1295,10 @@ static int hi556_suspend(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct hi556 *hi556 = to_hi556(sd);
-	int ret;
 
 	gpiod_set_value_cansleep(hi556->reset_gpio, 1);
-
-	ret = regulator_disable(hi556->avdd);
-	if (ret) {
-		dev_err(dev, "failed to disable avdd: %d\n", ret);
-		gpiod_set_value_cansleep(hi556->reset_gpio, 0);
-		return ret;
-	}
-
+	regulator_bulk_disable(ARRAY_SIZE(hi556_supply_names),
+			       hi556->supplies);
 	clk_disable_unprepare(hi556->clk);
 	return 0;
 }
@@ -1314,9 +1313,10 @@ static int hi556_resume(struct device *dev)
 	if (ret)
 		return ret;
 
-	ret = regulator_enable(hi556->avdd);
+	ret = regulator_bulk_enable(ARRAY_SIZE(hi556_supply_names),
+				    hi556->supplies);
 	if (ret) {
-		dev_err(dev, "failed to enable avdd: %d\n", ret);
+		dev_err(dev, "failed to enable regulators: %d", ret);
 		clk_disable_unprepare(hi556->clk);
 		return ret;
 	}
@@ -1335,7 +1335,7 @@ static int hi556_probe(struct i2c_client *client)
 {
 	struct hi556 *hi556;
 	bool full_power;
-	int ret;
+	int i, ret;
 
 	ret = hi556_check_hwcfg(&client->dev);
 	if (ret)
@@ -1358,11 +1358,15 @@ static int hi556_probe(struct i2c_client *client)
 		return dev_err_probe(&client->dev, PTR_ERR(hi556->clk),
 				     "failed to get clock\n");
 
-	/* The regulator core will provide a "dummy" regulator if necessary */
-	hi556->avdd = devm_regulator_get(&client->dev, "avdd");
-	if (IS_ERR(hi556->avdd))
-		return dev_err_probe(&client->dev, PTR_ERR(hi556->avdd),
-				     "failed to get avdd regulator\n");
+	for (i = 0; i < ARRAY_SIZE(hi556_supply_names); i++)
+		hi556->supplies[i].supply = hi556_supply_names[i];
+
+	ret = devm_regulator_bulk_get(&client->dev,
+				      ARRAY_SIZE(hi556_supply_names),
+				      hi556->supplies);
+	if (ret)
+		return dev_err_probe(&client->dev, ret,
+				     "failed to get regulators\n");
 
 	full_power = acpi_dev_state_d0(&client->dev);
 	if (full_power) {