netdev - [PATCH net-next v2 2/3] net: phy: add callback for custom interrupt handler to struct phy

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Message-ID: <acb8507d-d5a3-2190-8d5c-988f1062f2e7@gmail.com>
Date:   Thu, 30 May 2019 15:10:06 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next v2 2/3] net: phy: add callback for custom interrupt
 handler to struct phy_driver

The phylib interrupt handler handles link change events only currently.
However PHY drivers may want to use other interrupt sources too,
e.g. to report temperature monitoring events. Therefore add a callback
to struct phy_driver allowing PHY drivers to implement a custom
interrupt handler.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
Suggested-by: Russell King - ARM Linux admin <linux@...linux.org.uk>
Acked-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/phy.c | 9 +++++++--
 include/linux/phy.h   | 3 +++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index d90d9863e..068f0a126 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -772,8 +772,13 @@ static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 	if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev))
 		return IRQ_NONE;
 
-	/* reschedule state queue work to run as soon as possible */
-	phy_trigger_machine(phydev);
+	if (phydev->drv->handle_interrupt) {
+		if (phydev->drv->handle_interrupt(phydev))
+			goto phy_err;
+	} else {
+		/* reschedule state queue work to run as soon as possible */
+		phy_trigger_machine(phydev);
+	}
 
 	if (phy_clear_interrupt(phydev))
 		goto phy_err;
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 72e1196f9..16cd33915 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -537,6 +537,9 @@ struct phy_driver {
 	 */
 	int (*did_interrupt)(struct phy_device *phydev);
 
+	/* Override default interrupt handling */
+	int (*handle_interrupt)(struct phy_device *phydev);
+
 	/* Clears up any memory if needed */
 	void (*remove)(struct phy_device *phydev);
 
-- 
2.21.0