[PATCH 03/16] 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.

Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
 drivers/net/phy/adin.c | 44 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c
index c100a0dd95cd..b75c723bda79 100644
--- a/drivers/net/phy/adin.c
+++ b/drivers/net/phy/adin.c
@@ -14,6 +14,22 @@
 #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)
 {
        int rc;
@@ -25,15 +41,40 @@ static int adin_config_init(struct phy_device *phydev)
        return 0;
 }
 
+static int adin_phy_ack_intr(struct phy_device *phydev)
+{
+       int ret;
+
+       /* Clear pending interrupts.  */
+       ret = phy_read(phydev, ADIN1300_INT_STATUS_REG);
+       if (ret < 0)
+               return ret;
+
+       return 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         = PHY_ID_ADIN1200,
                .name           = "ADIN1200",
                .phy_id_mask    = 0xfffffff0,
                .features       = PHY_BASIC_FEATURES,
+               .flags          = PHY_HAS_INTERRUPT,
                .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,
        },
@@ -42,9 +83,12 @@ static struct phy_driver adin_driver[] = {
                .name           = "ADIN1300",
                .phy_id_mask    = 0xfffffff0,
                .features       = PHY_GBIT_FEATURES,
+               .flags          = PHY_HAS_INTERRUPT,
                .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