Received-SPF: pass (google.com: domain of linux-wireless-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Sun, 18 Apr 2021 23:26:12 +0200
From:   Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
To:     Ryder Lee <ryder.lee@mediatek.com>
Cc:     Felix Fietkau <nbd@nbd.name>,
        Shayne Chen <shayne.chen@mediatek.com>,
        linux-wireless@vger.kernel.org, linux-mediatek@lists.infradead.org
Subject: Re: [PATCH 1/2] mt76: mt7915: add thermal sensor device support
Message-ID: <YHyj9H52zgoDXWbN@lore-desk>
References: <b51d79d257e150a09d51029e3465e2ce925d6cfe.1618691395.git.ryder.lee@mediatek.com>
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[...]
> =20
> +static ssize_t mt7915_thermal_show_temp(struct device *dev,
> +					struct device_attribute *attr,
> +					char *buf)
> +{
> +	struct mt7915_phy *phy =3D dev_get_drvdata(dev);
> +	int temperature;
> +
> +	mutex_lock(&phy->dev->mt76.mutex);
> +	temperature =3D mt7915_mcu_get_temperature(phy);
> +	mutex_unlock(&phy->dev->mt76.mutex);

I guess we do not need this lock here since mcu already has its own lock (m=
cu
mutex) and mt7915 does not support runtime-pm.

Regards,
Lorenzo

> +
> +	if (temperature < 0)
> +		return temperature;
> +
> +	/* display in millidegree celcius */
> +	return sprintf(buf, "%u\n", temperature * 1000);
> +}
> +
> +static SENSOR_DEVICE_ATTR(temp1_input, 0444, mt7915_thermal_show_temp,
> +			  NULL, 0);
> +
> +static struct attribute *mt7915_hwmon_attrs[] =3D {
> +	&sensor_dev_attr_temp1_input.dev_attr.attr,
> +	NULL,
> +};
> +ATTRIBUTE_GROUPS(mt7915_hwmon);
> +
> +static int mt7915_thermal_init(struct mt7915_phy *phy)
> +{
> +	struct wiphy *wiphy =3D phy->mt76->hw->wiphy;
> +	struct device *hwmon;
> +
> +	/* TODO: add cooling device for throttling */
> +
> +	if (!IS_REACHABLE(CONFIG_HWMON))
> +		return 0;
> +
> +	hwmon =3D devm_hwmon_device_register_with_groups(&wiphy->dev,
> +						       wiphy_name(wiphy), phy,
> +						       mt7915_hwmon_groups);
> +	if (IS_ERR(hwmon))
> +		return PTR_ERR(hwmon);
> +
> +	return 0;
> +}
> +
>  static void
>  mt7915_init_txpower(struct mt7915_dev *dev,
>  		    struct ieee80211_supported_band *sband)
> @@ -286,6 +334,10 @@ static int mt7915_register_ext_phy(struct mt7915_dev=
 *dev)
>  	if (ret)
>  		goto error;
> =20
> +	ret =3D mt7915_thermal_init(phy);
> +	if (ret)
> +		goto error;
> +
>  	return 0;
> =20
>  error:
> @@ -739,6 +791,10 @@ int mt7915_register_device(struct mt7915_dev *dev)
>  	if (ret)
>  		return ret;
> =20
> +	ret =3D mt7915_thermal_init(&dev->phy);
> +	if (ret)
> +		return ret;
> +
>  	ieee80211_queue_work(mt76_hw(dev), &dev->init_work);
> =20
>  	ret =3D mt7915_register_ext_phy(dev);
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/ne=
t/wireless/mediatek/mt76/mt7915/mcu.c
> index 559ad230eabe..17a617df6dba 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> @@ -3469,16 +3469,17 @@ int mt7915_mcu_apply_tx_dpd(struct mt7915_phy *ph=
y)
>  	return 0;
>  }
> =20
> -int mt7915_mcu_get_temperature(struct mt7915_dev *dev, int index)
> +int mt7915_mcu_get_temperature(struct mt7915_phy *phy)
>  {
> +	struct mt7915_dev *dev =3D phy->dev;
>  	struct {
>  		u8 ctrl_id;
>  		u8 action;
> -		u8 band;
> +		u8 dbdc_idx;
>  		u8 rsv[5];
>  	} req =3D {
>  		.ctrl_id =3D THERMAL_SENSOR_TEMP_QUERY,
> -		.action =3D index,
> +		.dbdc_idx =3D phy !=3D &dev->phy,
>  	};
> =20
>  	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD(THERMAL_CTRL), &req,
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers=
/net/wireless/mediatek/mt76/mt7915/mt7915.h
> index 80eb35231a1a..d5296e2d481b 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
> @@ -357,7 +357,7 @@ int mt7915_mcu_set_radar_th(struct mt7915_dev *dev, i=
nt index,
>  			    const struct mt7915_dfs_pattern *pattern);
>  int mt7915_mcu_apply_group_cal(struct mt7915_dev *dev);
>  int mt7915_mcu_apply_tx_dpd(struct mt7915_phy *phy);
> -int mt7915_mcu_get_temperature(struct mt7915_dev *dev, int index);
> +int mt7915_mcu_get_temperature(struct mt7915_phy *phy);
>  int mt7915_mcu_get_tx_rate(struct mt7915_dev *dev, u32 cmd, u16 wlan_idx=
);
>  int mt7915_mcu_get_rx_rate(struct mt7915_phy *phy, struct ieee80211_vif =
*vif,
>  			   struct ieee80211_sta *sta, struct rate_info *rate);
> --=20
> 2.18.0
>=20

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