regulator: max20086: Change enable gpio to optional

The enable pin can be configured as always enabled by the hardware. Make
the enable gpio request optional so the driver doesn't fail to probe
when `enable-gpios` property is not present in the device tree.

Cc: [email protected]
Fixes: bfff546 ("regulator: Add MAX20086-MAX20089 driver")
Signed-off-by: João Paulo Gonçalves <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: JPSGoncalves

drivers/regulator/max20086-regulator.c

@@ -259,7 +259,7 @@ static int max20086_i2c_probe(struct i2c_client *i2c)
 	 * shutdown.
 	 */
 	flags = boot_on ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
-	chip->ena_gpiod = devm_gpiod_get(chip->dev, "enable", flags);
+	chip->ena_gpiod = devm_gpiod_get_optional(chip->dev, "enable", flags);
 	if (IS_ERR(chip->ena_gpiod)) {
 		ret = PTR_ERR(chip->ena_gpiod);
 		dev_err(chip->dev, "Failed to get enable GPIO: %d\n", ret);