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From: Guenter Roeck <linux@roeck-us.net>
To: Andrew Lunn <andrew@lunn.ch>, Oleksij Rempel <o.rempel@pengutronix.de>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Jean Delvare <jdelvare@suse.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	Marek Vasut <marex@denx.de>, David Jander <david@protonic.nl>,
	linux-hwmon@vger.kernel.org
Subject: Re: [PATCH net-next v1] net: phy: nxp-tja11xx: log critical health state
Date: Tue, 10 Aug 2021 11:18:05 -0700	[thread overview]
Message-ID: <04df44d9-f049-e87b-81de-5a9fe888a49b@roeck-us.net> (raw)
In-Reply-To: <YRKV05IoqtJYr6Cj@lunn.ch>

On 8/10/21 8:05 AM, Andrew Lunn wrote:
> Hi Oleksij
> 
>> @@ -89,6 +91,12 @@ static struct tja11xx_phy_stats tja11xx_hw_stats[] = {
>>   	{ "phy_polarity_detect", 25, 6, BIT(6) },
>>   	{ "phy_open_detect", 25, 7, BIT(7) },
>>   	{ "phy_short_detect", 25, 8, BIT(8) },
>> +	{ "phy_temp_warn (temp > 155C°)", 25, 9, BIT(9) },
>> +	{ "phy_temp_high (temp > 180C°)", 25, 10, BIT(10) },
>> +	{ "phy_uv_vddio", 25, 11, BIT(11) },
>> +	{ "phy_uv_vddd_1v8", 25, 13, BIT(13) },
>> +	{ "phy_uv_vdda_3v3", 25, 14, BIT(14) },
>> +	{ "phy_uv_vddd_3v3", 25, 15, BIT(15) },
>>   	{ "phy_rem_rcvr_count", 26, 0, GENMASK(7, 0) },
>>   	{ "phy_loc_rcvr_count", 26, 8, GENMASK(15, 8) },
> 
> I'm not so happy abusing the statistic counters like this. Especially
> when we have a better API for temperature and voltage: hwmon.
> 
> phy_temp_warn maps to hwmon_temp_max_alarm. phy_temp_high maps to
> either hwmon_temp_crit_alarm or hwmon_temp_emergency_alarm.
> 
> The under voltage maps to hwmon_in_lcrit_alarm.
> 

FWIW, the statistics counters in this driver are already abused
(phy_polarity_detect, phy_open_detect, phy_short_detect), so
I am not sure if adding more abuse makes a difference (and/or
if such abuse is common for phy drivers in general).

Guenter

>> @@ -630,6 +640,11 @@ static irqreturn_t tja11xx_handle_interrupt(struct phy_device *phydev)
>>   		return IRQ_NONE;
>>   	}
>>   
>> +	if (irq_status & MII_INTSRC_TEMP_ERR)
>> +		dev_err(dev, "Overtemperature error detected (temp > 155C°).\n");
>> +	if (irq_status & MII_INTSRC_UV_ERR)
>> +		dev_err(dev, "Undervoltage error detected.\n");
>> +
> 
> These are not actual errors, in the linux sense. So dev_warn() or
> maybe dev_info().
> 
>        Andrew
> 


  reply	other threads:[~2021-08-10 18:25 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-10 12:56 Oleksij Rempel
2021-08-10 15:05 ` Andrew Lunn
2021-08-10 18:18   ` Guenter Roeck [this message]
2021-08-10 18:42     ` Andrew Lunn

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