[PATCH] hwmon: (tmp401) register with thermal subsystem

[PATCH] hwmon: (tmp401) register with thermal subsystem

[Vincent Jardin via B4 Relay]

From: Vincent Jardin <vjardin@free.fr>

tmp401 is missing HWMON_C_REGISTER_TZ. So a devicetree thermal
zone referencing a such sensor ('thermal-sensors = <&tmp411 N>')
fails to register it. Then its cooling-maps is not set, which means
that the fans are not managed.

Same as lm90 or jc42, set HWMON_C_REGISTER_TZ.
Boards without the property into the DT keep the same behavior.

Signed-off-by: Vincent Jardin <vjardin@free.fr>
---
It was checked on a LX2160A board that uses a TMP411 for the chassis ambient
input of a fan thermal zone.
Without this patch the zone silently never registers.
With this patch, the zone registers and the cooling-map drives the EMC2305
fans.
---
 drivers/hwmon/tmp401.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index ca0ff525ea29..83aafe4bd3e7 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -695,7 +695,7 @@ static int tmp401_probe(struct i2c_client *client)
 	info->type = hwmon_chip;
 	info->config = data->chip_channel_config;
 
-	data->chip_channel_config[0] = HWMON_C_UPDATE_INTERVAL;
+	data->chip_channel_config[0] = HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL;
 
 	info = &data->temp_info;
 	info->type = hwmon_temp;

---
base-commit: ca078d004cf58137bcf8cb24a8b271397431ba58
change-id: 20260713-for-upstream-hwmon-tmp401-register-tz-d07130b9be30

Best regards,
-- 
Vincent Jardin <vjardin@free.fr>

Re: [PATCH] hwmon: (tmp401) register with thermal subsystem

[sashiko-bot]

> From: Vincent Jardin <vjardin@free.fr>
> 
> tmp401 is missing HWMON_C_REGISTER_TZ. So a devicetree thermal
> zone referencing a such sensor ('thermal-sensors = <&tmp411 N>')
> fails to register it. Then its cooling-maps is not set, which means
> that the fans are not managed.
> 
> Same as lm90 or jc42, set HWMON_C_REGISTER_TZ.
> Boards without the property into the DT keep the same behavior.
> 
> Signed-off-by: Vincent Jardin <vjardin@free.fr>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260713-for-upstream-hwmon-tmp401-register-tz-v1-1-47315d8617bc@free.fr?part=1

Re: [PATCH] hwmon: (tmp401) register with thermal subsystem

[Guenter Roeck]

On Mon, Jul 13, 2026 at 11:07:54PM +0200, Vincent Jardin wrote:
> From: Vincent Jardin <vjardin@free.fr>
> 
> tmp401 is missing HWMON_C_REGISTER_TZ. So a devicetree thermal
> zone referencing a such sensor ('thermal-sensors = <&tmp411 N>')
> fails to register it. Then its cooling-maps is not set, which means
> that the fans are not managed.
> 
> Same as lm90 or jc42, set HWMON_C_REGISTER_TZ.
> Boards without the property into the DT keep the same behavior.
> 
> Signed-off-by: Vincent Jardin <vjardin@free.fr>

Applied.

Thanks,
Guenter