Allow sensors tool to read radio's temperature, example:
mt7925_phy8-pci-3b00
Adapter: PCI adapter
temp1: +35.0°C
Signed-off-by: Deren Wu <[email protected]>
---
.../net/wireless/mediatek/mt76/mt7925/init.c | 56 +++++++++++++++++++
.../net/wireless/mediatek/mt76/mt7925/mcu.c | 36 ++++++++++++
.../wireless/mediatek/mt76/mt7925/mt7925.h | 1 +
3 files changed, 93 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/init.c b/drivers/net/wireless/mediatek/mt76/mt7925/init.c
index 8f9b7a2f376c..c4cbc8976046 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/init.c
@@ -2,11 +2,61 @@
/* Copyright (C) 2023 MediaTek Inc. */
#include <linux/etherdevice.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/thermal.h>
#include <linux/firmware.h>
#include "mt7925.h"
#include "mac.h"
#include "mcu.h"
+static ssize_t mt7925_thermal_temp_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ switch (to_sensor_dev_attr(attr)->index) {
+ case 0: {
+ struct mt792x_phy *phy = dev_get_drvdata(dev);
+ struct mt792x_dev *mdev = phy->dev;
+ int temperature;
+
+ mt792x_mutex_acquire(mdev);
+ temperature = mt7925_mcu_get_temperature(phy);
+ mt792x_mutex_release(mdev);
+
+ if (temperature < 0)
+ return temperature;
+ /* display in millidegree Celsius */
+ return sprintf(buf, "%u\n", temperature * 1000);
+ }
+ default:
+ return -EINVAL;
+ }
+}
+static SENSOR_DEVICE_ATTR_RO(temp1_input, mt7925_thermal_temp, 0);
+
+static struct attribute *mt7925_hwmon_attrs[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(mt7925_hwmon);
+
+static int mt7925_thermal_init(struct mt792x_phy *phy)
+{
+ struct wiphy *wiphy = phy->mt76->hw->wiphy;
+ struct device *hwmon;
+ const char *name;
+
+ if (!IS_REACHABLE(CONFIG_HWMON))
+ return 0;
+
+ name = devm_kasprintf(&wiphy->dev, GFP_KERNEL, "mt7925_%s",
+ wiphy_name(wiphy));
+
+ hwmon = devm_hwmon_device_register_with_groups(&wiphy->dev, name, phy,
+ mt7925_hwmon_groups);
+ return PTR_ERR_OR_ZERO(hwmon);
+}
static void
mt7925_regd_notifier(struct wiphy *wiphy,
struct regulatory_request *req)
@@ -142,6 +192,12 @@ static void mt7925_init_work(struct work_struct *work)
return;
}
+ ret = mt7925_thermal_init(&dev->phy);
+ if (ret) {
+ dev_err(dev->mt76.dev, "thermal init failed\n");
+ return;
+ }
+
/* we support chip reset now */
dev->hw_init_done = true;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index c5fd7116929b..d6909d77bbe1 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -656,6 +656,42 @@ int mt7925_mcu_fw_log_2_host(struct mt792x_dev *dev, u8 ctrl)
return ret;
}
+int mt7925_mcu_get_temperature(struct mt792x_phy *phy)
+{
+ struct {
+ u8 _rsv[4];
+
+ __le16 tag;
+ __le16 len;
+ u8 _rsv2[4];
+ } __packed req = {
+ .tag = cpu_to_le16(0x0),
+ .len = cpu_to_le16(sizeof(req) - 4),
+ };
+ struct mt7925_thermal_evt {
+ u8 rsv[4];
+ __le32 temperature;
+ } __packed * evt;
+ struct mt792x_dev *dev = phy->dev;
+ int temperature, ret;
+ struct sk_buff *skb;
+
+ ret = mt76_mcu_send_and_get_msg(&dev->mt76,
+ MCU_WM_UNI_CMD_QUERY(THERMAL),
+ &req, sizeof(req), true, &skb);
+ if (ret)
+ return ret;
+
+ skb_pull(skb, 4 + sizeof(struct tlv));
+ evt = (struct mt7925_thermal_evt *)skb->data;
+
+ temperature = le32_to_cpu(evt->temperature);
+
+ dev_kfree_skb(skb);
+
+ return temperature;
+}
+
static void
mt7925_mcu_parse_phy_cap(struct mt792x_dev *dev, char *data)
{
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h b/drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h
index 33785f526acf..8a4a71f6bcb6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h
@@ -271,6 +271,7 @@ int mt7925_mcu_set_sniffer(struct mt792x_dev *dev, struct ieee80211_vif *vif,
bool enable);
int mt7925_mcu_config_sniffer(struct mt792x_vif *vif,
struct ieee80211_chanctx_conf *ctx);
+int mt7925_mcu_get_temperature(struct mt792x_phy *phy);
int mt7925_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
enum mt76_txq_id qid, struct mt76_wcid *wcid,
--
2.18.0