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wifi: mt76: mt7921: Support temp sensor

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Allow sensors tool to read radio's temperature, example:

mt7921_phy17-pci-1800
Adapter: PCI adapter
temp1:        +72.0°C

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Ben Greear 2023-06-02 14:14:24 -07:00 committed by Felix Fietkau
parent 0e5911bb7c
commit 6ae39b7c7e
3 changed files with 78 additions and 0 deletions
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60
drivers/net/wireless/mediatek/mt76/mt7921/init.c
View File

@ -2,6 +2,9 @@
/* Copyright (C) 2020 MediaTek Inc. */
#include <linux/etherdevice.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/thermal.h>
#include <linux/firmware.h>
#include "mt7921.h"
#include "../mt76_connac2_mac.h"
@ -51,6 +54,57 @@ static const struct ieee80211_iface_combination if_comb_chanctx[] = {
}
};
static ssize_t mt7921_thermal_temp_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
switch (to_sensor_dev_attr(attr)->index) {
case 0: {
struct mt7921_phy *phy = dev_get_drvdata(dev);
struct mt7921_dev *mdev = phy->dev;
int temperature;
mt7921_mutex_acquire(mdev);
temperature = mt7921_mcu_get_temperature(phy);
mt7921_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, mt7921_thermal_temp, 0);
static struct attribute *mt7921_hwmon_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(mt7921_hwmon);
static int mt7921_thermal_init(struct mt7921_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, "mt7921_%s",
wiphy_name(wiphy));
hwmon = devm_hwmon_device_register_with_groups(&wiphy->dev, name, phy,
mt7921_hwmon_groups);
if (IS_ERR(hwmon))
return PTR_ERR(hwmon);
return 0;
}
static void
mt7921_regd_notifier(struct wiphy *wiphy,
struct regulatory_request *request)
@ -363,6 +417,12 @@ static void mt7921_init_work(struct work_struct *work)
return;
}
ret = mt7921_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;

17
drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
View File

@ -1305,6 +1305,23 @@ int mt7921_mcu_set_clc(struct mt7921_dev *dev, u8 *alpha2,
return 0;
}
int mt7921_mcu_get_temperature(struct mt7921_phy *phy)
{
struct mt7921_dev *dev = phy->dev;
struct {
u8 ctrl_id;
u8 action;
u8 band_idx;
u8 rsv[5];
} req = {
.ctrl_id = THERMAL_SENSOR_TEMP_QUERY,
.band_idx = phy->mt76->band_idx,
};
return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD(THERMAL_CTRL), &req,
sizeof(req), true);
}
int mt7921_mcu_set_rxfilter(struct mt7921_dev *dev, u32 fif,
u8 bit_op, u32 bit_map)
{

1
drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
View File

@ -511,6 +511,7 @@ int mt7921_mcu_set_sniffer(struct mt7921_dev *dev, struct ieee80211_vif *vif,
bool enable);
int mt7921_mcu_config_sniffer(struct mt7921_vif *vif,
struct ieee80211_chanctx_conf *ctx);
int mt7921_mcu_get_temperature(struct mt7921_phy *phy);
int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
enum mt76_txq_id qid, struct mt76_wcid *wcid,