[PATCH v6 3/3] hwmon: emc2305: Use devm_thermal_of_cooling_device_register

florin.leotescu
2025-03-21T14:26:22Z

Prepare the emc2305 driver to use configuration from Device Tree nodes.
Switch to devm_thermal_of_cooling_device_register to simplify the
cleanup procedure, allowing the removal of emc2305_unset_tz and
emc2305_remove, which are no longer needed.

Signed-off-by: Florin Leotescu <florin.leotescu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
drivers/hwmon/emc2305.c | 33 ++++-----------------------------
1 file changed, 4 insertions(+), 29 deletions(-)

diff --git a/drivers/hwmon/emc2305.c b/drivers/hwmon/emc2305.c
index f8a4c76fcadd..234c54956a4b 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]);
@@ -332,24 +331,9 @@ static int emc2305_set_tz(struct device *dev)
for (i = 0; i < data->pwm_num; i++) {
ret = emc2305_set_single_tz(dev, i + 1);
if (ret)
- goto thermal_cooling_device_register_fail;
+ return ret;
}
return 0;
-
-thermal_cooling_device_register_fail:
- 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
@@ -599,14 +583,6 @@ 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,emc2305", },
{},
@@ -619,7 +595,6 @@ static struct i2c_driver emc2305_driver = {
.of_match_table = of_emc2305_match_table,
},
.probe = emc2305_probe,
- .remove = emc2305_remove,
.id_table = emc2305_ids,
};

--
2.34.1