iio: proximity: sx_common: Use devm_regulator_bulk_get_enable()

This driver only turns the power for some regulators on at probe and off
via a custom devm_add_action_or_reset() callback. The new
devm_regulator_bulk_get_enable() replaces all this boilerplate code.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20221016163409.320197-13-jic23@kernel.org

drivers/iio/proximity/sx_common.c

@@ -424,13 +424,6 @@ static const struct iio_buffer_setup_ops sx_common_buffer_setup_ops = {
 	.postdisable = sx_common_buffer_postdisable,
 };
 
-static void sx_common_regulator_disable(void *_data)
-{
-	struct sx_common_data *data = _data;
-
-	regulator_bulk_disable(ARRAY_SIZE(data->supplies), data->supplies);
-}
-
 #define SX_COMMON_SOFT_RESET				0xde
 
 static int sx_common_init_device(struct device *dev, struct iio_dev *indio_dev)
@@ -474,6 +467,7 @@ int sx_common_probe(struct i2c_client *client,
 		    const struct sx_common_chip_info *chip_info,
 		    const struct regmap_config *regmap_config)
 {
+	static const char * const regulator_names[] = { "vdd", "svdd" };
 	struct device *dev = &client->dev;
 	struct iio_dev *indio_dev;
 	struct sx_common_data *data;
@@ -487,8 +481,6 @@ int sx_common_probe(struct i2c_client *client,
 
 	data->chip_info = chip_info;
 	data->client = client;
-	data->supplies[0].supply = "vdd";
-	data->supplies[1].supply = "svdd";
 	mutex_init(&data->mutex);
 	init_completion(&data->completion);
 
@@ -497,23 +489,14 @@ int sx_common_probe(struct i2c_client *client,
 		return dev_err_probe(dev, PTR_ERR(data->regmap),
 				     "Could init register map\n");
 
-	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
-				      data->supplies);
+	ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(regulator_names),
+					     regulator_names);
 	if (ret)
 		return dev_err_probe(dev, ret, "Unable to get regulators\n");
 
-	ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies), data->supplies);
-	if (ret)
-		return dev_err_probe(dev, ret, "Unable to enable regulators\n");
-
 	/* Must wait for Tpor time after initial power up */
 	usleep_range(1000, 1100);
 
-	ret = devm_add_action_or_reset(dev, sx_common_regulator_disable, data);
-	if (ret)
-		return dev_err_probe(dev, ret,
-				     "Unable to register regulators deleter\n");
-
 	ret = data->chip_info->ops.check_whoami(dev, indio_dev);
 	if (ret)
 		return dev_err_probe(dev, ret, "error reading WHOAMI\n");

drivers/iio/proximity/sx_common.h

@@ -102,7 +102,6 @@ struct sx_common_chip_info {
  * @trig:		IIO trigger object.
  * @regmap:		Register map.
  * @num_default_regs:	Number of default registers to set at init.
- * @supplies:		Power supplies object.
  * @chan_prox_stat:	Last reading of the proximity status for each channel.
  *			We only send an event to user space when this changes.
  * @trigger_enabled:	True when the device trigger is enabled.
@@ -120,7 +119,6 @@ struct sx_common_data {
 	struct iio_trigger *trig;
 	struct regmap *regmap;
 
-	struct regulator_bulk_data supplies[2];
 	unsigned long chan_prox_stat;
 	bool trigger_enabled;