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wifi: mt76: mt7925: support temperature sensor
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>
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0844947ccf
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3 changed files with 93 additions and 0 deletions
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@ -2,11 +2,61 @@
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/* Copyright (C) 2023 MediaTek Inc. */
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#include <linux/etherdevice.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/thermal.h>
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#include <linux/firmware.h>
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#include "mt7925.h"
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#include "mac.h"
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#include "mcu.h"
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static ssize_t mt7925_thermal_temp_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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switch (to_sensor_dev_attr(attr)->index) {
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case 0: {
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struct mt792x_phy *phy = dev_get_drvdata(dev);
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struct mt792x_dev *mdev = phy->dev;
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int temperature;
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mt792x_mutex_acquire(mdev);
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temperature = mt7925_mcu_get_temperature(phy);
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mt792x_mutex_release(mdev);
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if (temperature < 0)
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return temperature;
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/* display in millidegree Celsius */
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return sprintf(buf, "%u\n", temperature * 1000);
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}
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default:
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return -EINVAL;
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}
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}
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static SENSOR_DEVICE_ATTR_RO(temp1_input, mt7925_thermal_temp, 0);
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static struct attribute *mt7925_hwmon_attrs[] = {
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(mt7925_hwmon);
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static int mt7925_thermal_init(struct mt792x_phy *phy)
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{
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struct wiphy *wiphy = phy->mt76->hw->wiphy;
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struct device *hwmon;
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const char *name;
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if (!IS_REACHABLE(CONFIG_HWMON))
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return 0;
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name = devm_kasprintf(&wiphy->dev, GFP_KERNEL, "mt7925_%s",
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wiphy_name(wiphy));
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hwmon = devm_hwmon_device_register_with_groups(&wiphy->dev, name, phy,
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mt7925_hwmon_groups);
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return PTR_ERR_OR_ZERO(hwmon);
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}
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static void
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mt7925_regd_notifier(struct wiphy *wiphy,
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struct regulatory_request *req)
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@ -142,6 +192,12 @@ static void mt7925_init_work(struct work_struct *work)
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return;
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}
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ret = mt7925_thermal_init(&dev->phy);
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if (ret) {
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dev_err(dev->mt76.dev, "thermal init failed\n");
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return;
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}
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/* we support chip reset now */
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dev->hw_init_done = true;
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@ -656,6 +656,42 @@ int mt7925_mcu_fw_log_2_host(struct mt792x_dev *dev, u8 ctrl)
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return ret;
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}
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int mt7925_mcu_get_temperature(struct mt792x_phy *phy)
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{
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struct {
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u8 _rsv[4];
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__le16 tag;
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__le16 len;
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u8 _rsv2[4];
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} __packed req = {
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.tag = cpu_to_le16(0x0),
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.len = cpu_to_le16(sizeof(req) - 4),
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};
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struct mt7925_thermal_evt {
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u8 rsv[4];
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__le32 temperature;
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} __packed * evt;
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struct mt792x_dev *dev = phy->dev;
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int temperature, ret;
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struct sk_buff *skb;
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ret = mt76_mcu_send_and_get_msg(&dev->mt76,
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MCU_WM_UNI_CMD_QUERY(THERMAL),
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&req, sizeof(req), true, &skb);
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if (ret)
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return ret;
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skb_pull(skb, 4 + sizeof(struct tlv));
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evt = (struct mt7925_thermal_evt *)skb->data;
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temperature = le32_to_cpu(evt->temperature);
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dev_kfree_skb(skb);
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return temperature;
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}
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static void
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mt7925_mcu_parse_phy_cap(struct mt792x_dev *dev, char *data)
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{
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@ -271,6 +271,7 @@ int mt7925_mcu_set_sniffer(struct mt792x_dev *dev, struct ieee80211_vif *vif,
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bool enable);
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int mt7925_mcu_config_sniffer(struct mt792x_vif *vif,
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struct ieee80211_chanctx_conf *ctx);
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int mt7925_mcu_get_temperature(struct mt792x_phy *phy);
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int mt7925_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
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enum mt76_txq_id qid, struct mt76_wcid *wcid,
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