netdev - [PATCH net-next] net: phy: micrel: Add interrupts support for LAN8804 PHY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220912195650.466518-1-horatiu.vultur@microchip.com>
Date:   Mon, 12 Sep 2022 21:56:50 +0200
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <andrew@...n.ch>, <hkallweit1@...il.com>, <linux@...linux.org.uk>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <UNGLinuxDriver@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next] net: phy: micrel: Add interrupts support for LAN8804 PHY

Add support for interrupts for LAN8804 PHY.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 drivers/net/phy/micrel.c | 55 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 7b8c5c8d013e..98e9bc101d96 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -2676,6 +2676,59 @@ static int lan8804_config_init(struct phy_device *phydev)
 	return 0;
 }
 
+static irqreturn_t lan8804_handle_interrupt(struct phy_device *phydev)
+{
+	int status;
+
+	status = phy_read(phydev, LAN8814_INTS);
+	if (status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	if (status > 0)
+		phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
+#define LAN8804_OUTPUT_CONTROL			25
+#define LAN8804_OUTPUT_CONTROL_INTR_BUFFER	BIT(14)
+#define LAN8804_CONTROL				31
+#define LAN8804_CONTROL_INTR_POLARITY		BIT(14)
+
+static int lan8804_config_intr(struct phy_device *phydev)
+{
+	int err;
+
+	/* Change interrupt polarity */
+	phy_write(phydev, LAN8804_CONTROL, LAN8804_CONTROL_INTR_POLARITY);
+
+	/* Change interrupt buffer type */
+	phy_write(phydev, LAN8804_OUTPUT_CONTROL,
+		  LAN8804_OUTPUT_CONTROL_INTR_BUFFER);
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+		err = phy_read(phydev, LAN8814_INTS);
+		if (err < 0)
+			return err;
+
+		err =  phy_write(phydev, LAN8814_INTC, LAN8814_INT_LINK);
+		if (err)
+			return err;
+	} else {
+		err =  phy_write(phydev, LAN8814_INTC, 0);
+		if (err)
+			return err;
+
+		err = phy_read(phydev, LAN8814_INTS);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
 static irqreturn_t lan8814_handle_interrupt(struct phy_device *phydev)
 {
 	int irq_status, tsu_irq_status;
@@ -3137,6 +3190,8 @@ static struct phy_driver ksphy_driver[] = {
 	.get_stats	= kszphy_get_stats,
 	.suspend	= genphy_suspend,
 	.resume		= kszphy_resume,
+	.config_intr	= lan8804_config_intr,
+	.handle_interrupt = lan8804_handle_interrupt,
 }, {
 	.phy_id		= PHY_ID_KSZ9131,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,
-- 
2.33.0