Commit e0ba6050 authored by Oleksij Rempel's avatar Oleksij Rempel Committed by David S. Miller
Browse files

net: phy: nxp-tja11xx: log critical health state 



TJA1102 provides interrupt notification for the critical health states
like overtemperature and undervoltage.

The overtemperature bit is set if package temperature is beyond 155C°.
This functionality was tested by heating the package up to 200C°

The undervoltage bit is set if supply voltage drops beyond some critical
threshold. Currently not tested.

In a typical use case, both of this events should be logged and stored
(or send to some remote system) for further investigations.

Signed-off-by: default avatarOleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 445af0d2

drivers/net/phy/nxp-tja11xx.c

+11 −2
Original line number Diff line number Diff line
@@ -47,12 +47,14 @@ 
#define MII_INTSRC_LINK_FAIL		BIT(10)

#define MII_INTSRC_LINK_UP		BIT(9)

#define MII_INTSRC_MASK			(MII_INTSRC_LINK_FAIL | MII_INTSRC_LINK_UP)

#define MII_INTSRC_TEMP_ERR		BIT(1)

#define MII_INTSRC_UV_ERR		BIT(3)

#define MII_INTSRC_TEMP_ERR		BIT(1)



#define MII_INTEN			22

#define MII_INTEN_LINK_FAIL		BIT(10)

#define MII_INTEN_LINK_UP		BIT(9)

#define MII_INTEN_UV_ERR		BIT(3)

#define MII_INTEN_TEMP_ERR		BIT(1)



#define MII_COMMSTAT			23

#define MII_COMMSTAT_LINK_UP		BIT(15)
@@ -607,7 +609,8 @@ static int tja11xx_config_intr(struct phy_device *phydev) 
		if (err)

			return err;



		value = MII_INTEN_LINK_FAIL | MII_INTEN_LINK_UP;

		value = MII_INTEN_LINK_FAIL | MII_INTEN_LINK_UP |

			MII_INTEN_UV_ERR | MII_INTEN_TEMP_ERR;

		err = phy_write(phydev, MII_INTEN, value);

	} else {

		err = phy_write(phydev, MII_INTEN, value);
@@ -622,6 +625,7 @@ static int tja11xx_config_intr(struct phy_device *phydev) 


static irqreturn_t tja11xx_handle_interrupt(struct phy_device *phydev)

{

	struct device *dev = &phydev->mdio.dev;

	int irq_status;



	irq_status = phy_read(phydev, MII_INTSRC);
@@ -630,6 +634,11 @@ static irqreturn_t tja11xx_handle_interrupt(struct phy_device *phydev) 
		return IRQ_NONE;

	}



	if (irq_status & MII_INTSRC_TEMP_ERR)

		dev_warn(dev, "Overtemperature error detected (temp > 155C°).\n");

	if (irq_status & MII_INTSRC_UV_ERR)

		dev_warn(dev, "Undervoltage error detected.\n");



	if (!(irq_status & MII_INTSRC_MASK))

		return IRQ_NONE;