linux-kernel - Re: [PATCH v5 net-next 08/13] net: phy: marvell-88q2xxx: add support for temperature sensor

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Date: Thu, 1 Feb 2024 08:11:37 +0100
From: Dimitri Fedrau <dima.fedrau@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Stefan Eichenberger <eichest@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v5 net-next 08/13] net: phy: marvell-88q2xxx: add support
 for temperature sensor

Am Wed, Jan 31, 2024 at 04:17:06PM +0100 schrieb Andrew Lunn:
> > +static int mv88q2xxx_hwmon_probe(struct phy_device *phydev)
> > +{
> > +	struct device *dev = &phydev->mdio.dev;
> > +	struct device *hwmon;
> > +	char *hwmon_name;
> > +	int ret;
> > +
> > +	/* Enable temperature sensor interrupt */
> > +	ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS,
> > +			       MDIO_MMD_PCS_MV_TEMP_SENSOR1,
> > +			       MDIO_MMD_PCS_MV_TEMP_SENSOR1_INT_EN);
> 
> You enable an interrupt, but i don't see any changes to the interrupt
> handler to handle any interrupts which are generated?
>
Hi Andrew,

you are right. Have to remove these lines. Besides enabling the interrupt
in MDIO_MMD_PCS_MV_TEMP_SENSOR1, there are two further register writes
necessary to make the interrupt propagate. I didn't want it to propagate.
Anyway it's wrong. I couldn't find a good solution to use the temperature
interrupt. Will have a look into this, and probably figuring out how to
do so. But it won't be part of this patch series.

Dimitri