netdev - [PATCH] net: phy: tja11xx: Add IRQ support to the driver

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Date:   Tue, 28 May 2019 20:16:16 +0200
From:   Marek Vasut <marex@...x.de>
To:     netdev@...r.kernel.org
Cc:     Marek Vasut <marex@...x.de>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org
Subject: [PATCH] net: phy: tja11xx: Add IRQ support to the driver

Add support for handling the TJA11xx PHY IRQ signal.

Signed-off-by: Marek Vasut <marex@...x.de>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Guenter Roeck <linux@...ck-us.net>
Cc: Heiner Kallweit <hkallweit1@...il.com>
Cc: Jean Delvare <jdelvare@...e.com>
Cc: linux-hwmon@...r.kernel.org
---
 drivers/net/phy/nxp-tja11xx.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c
index b705d0bd798b..0be9fe9a9604 100644
--- a/drivers/net/phy/nxp-tja11xx.c
+++ b/drivers/net/phy/nxp-tja11xx.c
@@ -40,6 +40,8 @@
 #define MII_INTSRC_TEMP_ERR		BIT(1)
 #define MII_INTSRC_UV_ERR		BIT(3)
 
+#define MII_INTEN			22
+
 #define MII_COMMSTAT			23
 #define MII_COMMSTAT_LINK_UP		BIT(15)
 
@@ -239,6 +241,30 @@ static int tja11xx_read_status(struct phy_device *phydev)
 	return 0;
 }
 
+static int tja11xx_config_intr(struct phy_device *phydev)
+{
+	int ret;
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+		ret = phy_write(phydev, MII_INTEN, 0xcfef);
+	else
+		ret = phy_write(phydev, MII_INTEN, 0);
+
+	if (ret < 0)
+		return ret;
+
+	ret = phy_read(phydev, MII_INTSRC);
+
+	return ret < 0 ? ret : 0;
+}
+
+static int tja11xx_ack_interrupt(struct phy_device *phydev)
+{
+	int ret = phy_read(phydev, MII_INTSRC);
+
+	return ret < 0 ? ret : 0;
+}
+
 static int tja11xx_get_sset_count(struct phy_device *phydev)
 {
 	return ARRAY_SIZE(tja11xx_hw_stats);
@@ -366,6 +392,9 @@ static struct phy_driver tja11xx_driver[] = {
 		.suspend	= genphy_suspend,
 		.resume		= genphy_resume,
 		.set_loopback   = genphy_loopback,
+		/* IRQ related */
+		.config_intr	= tja11xx_config_intr,
+		.ack_interrupt	= tja11xx_ack_interrupt,
 		/* Statistics */
 		.get_sset_count = tja11xx_get_sset_count,
 		.get_strings	= tja11xx_get_strings,
@@ -381,6 +410,9 @@ static struct phy_driver tja11xx_driver[] = {
 		.suspend	= genphy_suspend,
 		.resume		= genphy_resume,
 		.set_loopback   = genphy_loopback,
+		/* IRQ related */
+		.config_intr	= tja11xx_config_intr,
+		.ack_interrupt	= tja11xx_ack_interrupt,
 		/* Statistics */
 		.get_sset_count = tja11xx_get_sset_count,
 		.get_strings	= tja11xx_get_strings,
-- 
2.20.1