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wifi: mt76: mt7915: add thermal zone device registration

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Register the mt7915 phy as a thermal zone sensor using
devm_thermal_of_zone_register() so that device tree thermal-zones
nodes can reference the Wi-Fi chip as a temperature source. This
allows the kernel thermal governor to control external cooling
devices such as PWM fans based on Wi-Fi chip temperature.

Registration is non-fatal: -ENODEV is returned when no
thermal-sensors DT property references this device, which is the
expected case on platforms without a thermal zone configured.

Signed-off-by: Ryan Leung <[email protected]>
Link: https://patch.msgid.link/20260719-mt7915-thermal-zone-device-registration-v2-1-0eac68c2741e@protonmail.com
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Ryan Leung
2026-07-21 15:34:22 +02:00
committed by Felix Fietkau
parent 491d786c1b
commit fd25371901
2 changed files with 31 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mt7915/init.c
+30
View File
@@ -177,6 +177,25 @@ static const struct thermal_cooling_device_ops mt7915_thermal_ops = {
.set_cur_state = mt7915_thermal_set_cur_throttle_state,
};
static int mt7915_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
{
struct mt7915_phy *phy = thermal_zone_device_priv(tz);
int val;
mutex_lock(&phy->dev->mt76.mutex);
val = mt7915_mcu_get_temperature(phy);
mutex_unlock(&phy->dev->mt76.mutex);
if (val < 0)
return val;
*temp = val * 1000;
return 0;
}
static const struct thermal_zone_device_ops mt7915_tz_ops = {
.get_temp = mt7915_thermal_get_temp,
};
static void mt7915_unregister_thermal(struct mt7915_phy *phy)
{
struct wiphy *wiphy = phy->mt76->hw->wiphy;
@@ -213,6 +232,17 @@ static int mt7915_thermal_init(struct mt7915_phy *phy)
phy->throttle_temp[MT7915_CRIT_TEMP_IDX] = MT7915_CRIT_TEMP;
phy->throttle_temp[MT7915_MAX_TEMP_IDX] = MT7915_MAX_TEMP;
phy->tzone = devm_thermal_of_zone_register(phy->dev->mt76.dev,
phy->mt76->band_idx, phy,
&mt7915_tz_ops);
if (IS_ERR(phy->tzone)) {
if (PTR_ERR(phy->tzone) != -ENODEV)
dev_warn(phy->dev->mt76.dev,
"failed to register thermal zone: %ld\n",
PTR_ERR(phy->tzone));
phy->tzone = NULL;
}
if (!IS_REACHABLE(CONFIG_HWMON))
return 0;
mt7915/mt7915.h
+1
View File
@@ -215,6 +215,7 @@ struct mt7915_phy {
struct ieee80211_vif *monitor_vif;
struct thermal_zone_device *tzone;
struct thermal_cooling_device *cdev;
u8 cdev_state;
u8 throttle_state;