Re: [PATCH v3 3/3] hwmon: emc2305: Use devm_thermal_of_cooling_device_register

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On 3/4/25 08:21, florin.leotescu@xxxxxxxxxxx wrote:
From: Florin Leotescu <florin.leotescu@xxxxxxx>

This prepares emc2305 driver to use configuration from Device Tree nodes.
Using devm_thermal_of_cooling_device_register also simplifies cleanup
procedure, so we are able to remove the emc2305_unset_tz and emc2305_remove
functions which are no longer used.

Signed-off-by: Florin Leotescu <florin.leotescu@xxxxxxx>
---
  drivers/hwmon/emc2305.c | 28 +++-------------------------
  1 file changed, 3 insertions(+), 25 deletions(-)

diff --git a/drivers/hwmon/emc2305.c b/drivers/hwmon/emc2305.c
index a236f27c75bc..5f3f06308826 100644
--- a/drivers/hwmon/emc2305.c
+++ b/drivers/hwmon/emc2305.c
@@ -112,8 +112,6 @@ static char *emc2305_fan_name[] = {
  	"emc2305_fan5",
  };
-static void emc2305_unset_tz(struct device *dev);
-
  static int emc2305_get_max_channel(const struct emc2305_data *data)
  {
  	return data->pwm_num;
@@ -293,8 +291,9 @@ static int emc2305_set_single_tz(struct device *dev, int idx)
  	pwm = data->pwm_min[cdev_idx];
data->cdev_data[cdev_idx].cdev =
-		thermal_cooling_device_register(emc2305_fan_name[idx], data,
-						&emc2305_cooling_ops);
+		devm_thermal_of_cooling_device_register(dev, dev->of_node,
+							emc2305_fan_name[idx], data,
+							&emc2305_cooling_ops);
if (IS_ERR(data->cdev_data[cdev_idx].cdev)) {
  		dev_err(dev, "Failed to register cooling device %s\n", emc2305_fan_name[idx]);
@@ -337,21 +336,9 @@ static int emc2305_set_tz(struct device *dev)
  	return 0;
thermal_cooling_device_register_fail:

This label is no longer necessary. Instead, any goto can be replaced with
an immediate return statement.

-	emc2305_unset_tz(dev);
  	return ret;
  }
-static void emc2305_unset_tz(struct device *dev)
-{
-	struct emc2305_data *data = dev_get_drvdata(dev);
-	int i;
-
-	/* Unregister cooling device. */
-	for (i = 0; i < EMC2305_PWM_MAX; i++)
-		if (data->cdev_data[i].cdev)
-			thermal_cooling_device_unregister(data->cdev_data[i].cdev);
-}
-
  static umode_t
  emc2305_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel)
  {
@@ -599,14 +586,6 @@ static int emc2305_probe(struct i2c_client *client)
  	return 0;
  }
-static void emc2305_remove(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-
-	if (IS_REACHABLE(CONFIG_THERMAL))
-		emc2305_unset_tz(dev);
-}
-
  static const struct of_device_id of_emc2305_match_table[] = {
  	{ .compatible = "microchip,emc2301", },
  	{ .compatible = "microchip,emc2302", },
@@ -622,7 +601,6 @@ static struct i2c_driver emc2305_driver = {
  		.of_match_table = of_emc2305_match_table,
  	},
  	.probe = emc2305_probe,
-	.remove	  = emc2305_remove,
  	.id_table = emc2305_ids,
  };





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