[PATCH v3 03/14] net: phy: adin: add support for interrupts

[Alexandru Ardelean]

This change adds support for enabling PHY interrupts that can be used by
the PHY framework to get signal for link/speed/auto-negotiation changes.

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
 drivers/net/phy/adin.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c
index fc0148ba4b94..91ff26d08fd5 100644
--- a/drivers/net/phy/adin.c
+++ b/drivers/net/phy/adin.c
@@ -14,11 +14,45 @@
 #define PHY_ID_ADIN1200				0x0283bc20
 #define PHY_ID_ADIN1300				0x0283bc30
 
+#define ADIN1300_INT_MASK_REG			0x0018
+#define   ADIN1300_INT_MDIO_SYNC_EN		BIT(9)
+#define   ADIN1300_INT_ANEG_STAT_CHNG_EN	BIT(8)
+#define   ADIN1300_INT_ANEG_PAGE_RX_EN		BIT(6)
+#define   ADIN1300_INT_IDLE_ERR_CNT_EN		BIT(5)
+#define   ADIN1300_INT_MAC_FIFO_OU_EN		BIT(4)
+#define   ADIN1300_INT_RX_STAT_CHNG_EN		BIT(3)
+#define   ADIN1300_INT_LINK_STAT_CHNG_EN	BIT(2)
+#define   ADIN1300_INT_SPEED_CHNG_EN		BIT(1)
+#define   ADIN1300_INT_HW_IRQ_EN		BIT(0)
+#define ADIN1300_INT_MASK_EN	\
+	(ADIN1300_INT_ANEG_STAT_CHNG_EN | ADIN1300_INT_ANEG_PAGE_RX_EN | \
+	 ADIN1300_INT_LINK_STAT_CHNG_EN | ADIN1300_INT_SPEED_CHNG_EN | \
+	 ADIN1300_INT_HW_IRQ_EN)
+#define ADIN1300_INT_STATUS_REG			0x0019
+
 static int adin_config_init(struct phy_device *phydev)
 {
 	return genphy_config_init(phydev);
 }
 
+static int adin_phy_ack_intr(struct phy_device *phydev)
+{
+	/* Clear pending interrupts */
+	int rc = phy_read(phydev, ADIN1300_INT_STATUS_REG);
+
+	return rc < 0 ? rc : 0;
+}
+
+static int adin_phy_config_intr(struct phy_device *phydev)
+{
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+		return phy_set_bits(phydev, ADIN1300_INT_MASK_REG,
+				    ADIN1300_INT_MASK_EN);
+
+	return phy_clear_bits(phydev, ADIN1300_INT_MASK_REG,
+			      ADIN1300_INT_MASK_EN);
+}
+
 static struct phy_driver adin_driver[] = {
 	{
 		PHY_ID_MATCH_MODEL(PHY_ID_ADIN1200),
@@ -26,6 +60,8 @@ static struct phy_driver adin_driver[] = {
 		.config_init	= adin_config_init,
 		.config_aneg	= genphy_config_aneg,
 		.read_status	= genphy_read_status,
+		.ack_interrupt	= adin_phy_ack_intr,
+		.config_intr	= adin_phy_config_intr,
 		.resume		= genphy_resume,
 		.suspend	= genphy_suspend,
 	},
@@ -35,6 +71,8 @@ static struct phy_driver adin_driver[] = {
 		.config_init	= adin_config_init,
 		.config_aneg	= genphy_config_aneg,
 		.read_status	= genphy_read_status,
+		.ack_interrupt	= adin_phy_ack_intr,
+		.config_intr	= adin_phy_config_intr,
 		.resume		= genphy_resume,
 		.suspend	= genphy_suspend,
 	},
-- 
2.20.1