regulator: fp9931: Fix handling of mandatory "vin" supply

[ Upstream commit 5806893 ]

The FP9931 requires a mandatory "vin" power supply to operate.
Replace devm_regulator_get_optional() with devm_regulator_get() to
enforce this mandatory dependency.

Fixes: 12d821b ("regulator: Add FP9931/JD9930 driver")
Signed-off-by: Robby Cai <robby.cai@nxp.com>
Link: https://patch.msgid.link/20260313133102.2749890-3-robby.cai@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: Robby Cai

drivers/regulator/fp9931.c

@@ -446,7 +446,7 @@ static int fp9931_probe(struct i2c_client *client)
 		return dev_err_probe(&client->dev, PTR_ERR(data->regmap),
 				     "failed to allocate regmap!\n");
 
-	data->vin_reg = devm_regulator_get_optional(&client->dev, "vin");
+	data->vin_reg = devm_regulator_get(&client->dev, "vin");
 	if (IS_ERR(data->vin_reg))
 		return dev_err_probe(&client->dev, PTR_ERR(data->vin_reg),
 				     "failed to get vin regulator\n");