Commit 6ae39b7c authored by Ben Greear's avatar Ben Greear Committed by Felix Fietkau
Browse files

wifi: mt76: mt7921: Support temp sensor 



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

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

Signed-off-by: default avatarBen Greear <greearb@candelatech.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 0e5911bb

drivers/net/wireless/mediatek/mt76/mt7921/init.c

+60 −0
Original line number Diff line number Diff line
@@ -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;

drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

+17 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h

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