[PATCH V2] net: phy: tja11xx: Add IRQ support to the driver

[Marek Vasut <marex@xxxxxxx>]

Add support for handling the TJA11xx PHY IRQ signal.

Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Andrew Lunn <andrew@xxxxxxx>
Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Cc: Jean Delvare <jdelvare@xxxxxxxx>
Cc: linux-hwmon@xxxxxxxxxxxxxxx
---
V2: - Define each bit of the MII_INTEN register and a mask
    - Drop IRQ acking from tja11xx_config_intr()
---
 drivers/net/phy/nxp-tja11xx.c | 48 +++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c
index b705d0bd798b..b41af609607d 100644
--- a/drivers/net/phy/nxp-tja11xx.c
+++ b/drivers/net/phy/nxp-tja11xx.c
@@ -40,6 +40,29 @@
 #define MII_INTSRC_TEMP_ERR		BIT(1)
 #define MII_INTSRC_UV_ERR		BIT(3)
 
+#define MII_INTEN			22
+#define MII_INTEN_PWON_EN		BIT(15)
+#define MII_INTEN_WAKEUP_EN		BIT(14)
+#define MII_INTEN_PHY_INIT_FAIL_EN	BIT(11)
+#define MII_INTEN_LINK_STATUS_FAIL_EN	BIT(10)
+#define MII_INTEN_LINK_STATUS_UP_EN	BIT(9)
+#define MII_INTEN_SYM_ERR_EN		BIT(8)
+#define MII_INTEN_TRAINING_FAILED_EN	BIT(7)
+#define MII_INTEN_SQI_WARNING_EN	BIT(6)
+#define MII_INTEN_CONTROL_ERR_EN	BIT(5)
+#define MII_INTEN_UV_ERR_EN		BIT(3)
+#define MII_INTEN_UV_RECOVERY_EN	BIT(2)
+#define MII_INTEN_TEMP_ERR_EN		BIT(1)
+#define MII_INTEN_SLEEP_ABORT_EN	BIT(0)
+#define MII_INTEN_MASK							\
+	(MII_INTEN_PWON_EN | MII_INTEN_WAKEUP_EN |			\
+	MII_INTEN_PHY_INIT_FAIL_EN | MII_INTEN_LINK_STATUS_FAIL_EN |	\
+	MII_INTEN_LINK_STATUS_UP_EN | MII_INTEN_SYM_ERR_EN |		\
+	MII_INTEN_TRAINING_FAILED_EN | MII_INTEN_SQI_WARNING_EN |	\
+	MII_INTEN_CONTROL_ERR_EN | MII_INTEN_UV_ERR_EN |		\
+	MII_INTEN_UV_RECOVERY_EN | MII_INTEN_TEMP_ERR_EN |		\
+	MII_INTEN_SLEEP_ABORT_EN)
+
 #define MII_COMMSTAT			23
 #define MII_COMMSTAT_LINK_UP		BIT(15)
 
@@ -239,6 +262,25 @@ 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, MII_INTEN_MASK);
+	else
+		ret = phy_write(phydev, MII_INTEN, 0);
+
+	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 +408,9 @@ 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 +426,9 @@ 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