net: pse-pd: pd692x0: Add support for controller and manager power supplies

Add support for managing the VDD and VDDA power supplies for the PD692x0
PSE controller, as well as the VAUX5 and VAUX3P3 power supplies for the
PD6920x PSE managers.

Signed-off-by: Kory Maincent (Dent Project) <[e-mail]>
Reviewed-by: Oleksij Rempel <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/pse-pd/pd692x0.c

···
 	reg_name_len = strlen(dev_name(dev)) + 23;
 
 	for (i = 0; i < nmanagers; i++) {
+		static const char * const regulators[] = { "vaux5", "vaux3p3" };
 		struct regulator_dev *rdev;
 		char *reg_name;
+		int ret;
 
 		reg_name = devm_kzalloc(dev, reg_name_len, GFP_KERNEL);
 		if (!reg_name)
···
 							  manager[i].node);
 		if (IS_ERR(rdev))
 			return PTR_ERR(rdev);
+
+		/* VMAIN is described as main supply for the manager.
+		 * Add other VAUX power supplies and link them to the
+		 * virtual device rdev->dev.
+		 */
+		ret = devm_regulator_bulk_get_enable(&rdev->dev,
+						     ARRAY_SIZE(regulators),
+						     regulators);
+		if (ret)
+			return dev_err_probe(&rdev->dev, ret,
+					     "Failed to enable regulators\n");
 
 		priv->manager_reg[i] = rdev;
 	}
···
 
 static int pd692x0_i2c_probe(struct i2c_client *client)
 {
+	static const char * const regulators[] = { "vdd", "vdda" };
 	struct pd692x0_msg msg, buf = {0}, zero = {0};
 	struct device *dev = &client->dev;
 	struct pd692x0_msg_ver ver;
 	struct pd692x0_priv *priv;
 	struct fw_upload *fwl;
 	int ret;
+
+	ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(regulators),
+					     regulators);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to enable regulators\n");
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		dev_err(dev, "i2c check functionality failed\n");