Commit 396e41a7 authored by Deren Wu's avatar Deren Wu Committed by Felix Fietkau
Browse files

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: default avatarDeren Wu <deren.wu@mediatek.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 0844947c

drivers/net/wireless/mediatek/mt76/mt7925/init.c

+56 −0
Original line number Diff line number Diff line
@@ -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;

drivers/net/wireless/mediatek/mt76/mt7925/mcu.c

+36 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h

+1 −0
Original line number Diff line number Diff line
@@ -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,