From d995a36b7e967e2f990984c741c26710eb8651d4 Mon Sep 17 00:00:00 2001
From: Ioana Ciornei <ioana.ciornei@nxp.com>
Date: Fri, 13 Nov 2020 18:52:19 +0200
Subject: [PATCH] net: phy: amd: implement generic .handle_interrupt() callback
In an attempt to actually support shared IRQs in phylib, we now move the
responsibility of triggering the phylib state machine or just returning
IRQ_NONE, based on the IRQ status register, to the PHY driver. Having
3 different IRQ handling callbacks (.handle_interrupt(),
.did_interrupt() and .ack_interrupt() ) is confusing so let the PHY
driver implement directly an IRQ handler like any other device driver.
Make this driver follow the new convention.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/phy/amd.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/net/phy/amd.c b/drivers/net/phy/amd.c
index eef35f8c8d450..ae75d95c398c0 100644
--- a/drivers/net/phy/amd.c
+++ b/drivers/net/phy/amd.c
@@ -20,6 +20,10 @@
#define MII_AM79C_IR_EN_ANEG 0x0100 /* IR enable Aneg Complete */
#define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
+#define MII_AM79C_IR_LINK_DOWN BIT(2)
+#define MII_AM79C_IR_ANEG_DONE BIT(0)
+#define MII_AM79C_IR_IMASK_STAT (MII_AM79C_IR_LINK_DOWN | MII_AM79C_IR_ANEG_DONE)
+
MODULE_DESCRIPTION("AMD PHY driver");
MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
MODULE_LICENSE("GPL");
@@ -56,6 +60,24 @@ static int am79c_config_intr(struct phy_device *phydev)
return err;
}
+static irqreturn_t am79c_handle_interrupt(struct phy_device *phydev)
+{
+ int irq_status;
+
+ irq_status = phy_read(phydev, MII_AM79C_IR);
+ if (irq_status < 0) {
+ phy_error(phydev);
+ return IRQ_NONE;
+ }
+
+ if (!(irq_status & MII_AM79C_IR_IMASK_STAT))
+ return IRQ_NONE;
+
+ phy_trigger_machine(phydev);
+
+ return IRQ_HANDLED;
+}
+
static struct phy_driver am79c_driver[] = { {
.phy_id = PHY_ID_AM79C874,
.name = "AM79C874",
@@ -64,6 +86,7 @@ static struct phy_driver am79c_driver[] = { {
.config_init = am79c_config_init,
.ack_interrupt = am79c_ack_interrupt,
.config_intr = am79c_config_intr,
+ .handle_interrupt = am79c_handle_interrupt,
} };
module_phy_driver(am79c_driver);