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Message-ID: <20211221070502.14811-1-Divya.Koppera@microchip.com>
Date: Tue, 21 Dec 2021 12:35:02 +0530
From: Divya Koppera <Divya.Koppera@...rochip.com>
To: <andrew@...n.ch>, <hkallweit1@...il.com>, <linux@...linux.org.uk>,
<davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <UNGLinuxDriver@...rochip.com>
Subject: [PATCH net-next] net: phy: micrel: Adding interrupt support for Link up/Link down in LAN8814 Quad phy
This patch add support for Link up or Link down
interrupt support in LAN8814 Quad phy.
Signed-off-by: Divya Koppera <Divya.Koppera@...rochip.com>
---
drivers/net/phy/micrel.c | 71 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 44a24b99c894..46931020ef84 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -66,6 +66,23 @@
#define KSZ8081_LMD_SHORT_INDICATOR BIT(12)
#define KSZ8081_LMD_DELTA_TIME_MASK GENMASK(8, 0)
+/* Lan8814 general Interrupt control/status reg in GPHY specific block. */
+#define LAN8814_INTC 0x18
+#define LAN8814_INTC_LINK_DOWN BIT(2)
+#define LAN8814_INTC_LINK_UP BIT(0)
+#define LAN8814_INTC_LINK (LAN8814_INTC_LINK_UP |\
+ LAN8814_INTC_LINK_DOWN)
+
+#define LAN8814_INTS 0x1B
+#define LAN8814_INTS_LINK_DOWN BIT(2)
+#define LAN8814_INTS_LINK_UP BIT(0)
+#define LAN8814_INTS_LINK (LAN8814_INTS_LINK_UP |\
+ LAN8814_INTS_LINK_DOWN)
+
+#define LAN8814_INTR_CTRL_REG 0x34
+#define LAN8814_INTR_CTRL_REG_POLARITY BIT(1)
+#define LAN8814_INTR_CTRL_REG_INTR_ENABLE BIT(0)
+
/* PHY Control 1 */
#define MII_KSZPHY_CTRL_1 0x1e
#define KSZ8081_CTRL1_MDIX_STAT BIT(4)
@@ -1620,6 +1637,58 @@ static int lan8804_config_init(struct phy_device *phydev)
return 0;
}
+static irqreturn_t lan8814_handle_interrupt(struct phy_device *phydev)
+{
+ int irq_status;
+
+ irq_status = phy_read(phydev, LAN8814_INTS);
+ if (irq_status < 0)
+ return IRQ_NONE;
+
+ if (!(irq_status & LAN8814_INTS_LINK))
+ return IRQ_NONE;
+
+ phy_trigger_machine(phydev);
+
+ return IRQ_HANDLED;
+}
+
+static int lan8814_ack_interrupt(struct phy_device *phydev)
+{
+ /* bit[12..0] int status, which is a read and clear register. */
+ int rc;
+
+ rc = phy_read(phydev, LAN8814_INTS);
+
+ return (rc < 0) ? rc : 0;
+}
+
+static int lan8814_config_intr(struct phy_device *phydev)
+{
+ int err;
+
+ lanphy_write_page_reg(phydev, 4, LAN8814_INTR_CTRL_REG,
+ LAN8814_INTR_CTRL_REG_POLARITY |
+ LAN8814_INTR_CTRL_REG_INTR_ENABLE);
+
+ /* enable / disable interrupts */
+ if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+ err = lan8814_ack_interrupt(phydev);
+ if (err)
+ return err;
+
+ err = phy_write(phydev, LAN8814_INTC, LAN8814_INTC_LINK);
+ } else {
+ err = phy_write(phydev, LAN8814_INTC, 0);
+ if (err)
+ return err;
+
+ err = lan8814_ack_interrupt(phydev);
+ }
+
+ return err;
+}
+
static struct phy_driver ksphy_driver[] = {
{
.phy_id = PHY_ID_KS8737,
@@ -1802,6 +1871,8 @@ static struct phy_driver ksphy_driver[] = {
.get_stats = kszphy_get_stats,
.suspend = genphy_suspend,
.resume = kszphy_resume,
+ .config_intr = lan8814_config_intr,
+ .handle_interrupt = lan8814_handle_interrupt,
}, {
.phy_id = PHY_ID_LAN8804,
.phy_id_mask = MICREL_PHY_ID_MASK,
--
2.17.1
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