linux-kernel - [PATCH 03/16] net: phy: adin: add support for interrupts

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Message-ID: <20190805165453.3989-4-alexandru.ardelean@analog.com>
Date:   Mon, 5 Aug 2019 19:54:40 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <davem@...emloft.net>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <f.fainelli@...il.com>,
        <hkallweit1@...il.com>, <andrew@...n.ch>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH 03/16] net: phy: adin: add support for interrupts

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.ardelean@...log.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