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Code Issues Releases Wiki Activity

wifi: mt76: mt7925: support temperature sensor

Browse source 
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 <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Deren Wu 2023-12-24 16:04:59 +08:00 committed by Felix Fietkau
parent 0844947ccf
commit 396e41a74a
3 changed files with 93 additions and 0 deletions
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56
drivers/net/wireless/mediatek/mt76/mt7925/init.c
View file

@ -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;

36
drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
View file

@ -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)
{

1
drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h
View file

@ -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,