[PATCH 5.10 42/52] net: phy: microchip: implement generic .handle_interrupt() callback

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ioana Ciornei <ioana.ciornei@nxp.com>

[ Upstream commit e01a3feb8f69ab620b0016498603cad364f65224 ]

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.

Cc: Nisar Sayed <Nisar.Sayed@microchip.com>
Cc: Yuiko Oshino <yuiko.oshino@microchip.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 30a41ed32d30 ("net: phy: microchip: force IRQ polling mode for lan88xx")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/phy/microchip.c    |   19 +++++++++++++++++++
 drivers/net/phy/microchip_t1.c |   19 +++++++++++++++++++
 2 files changed, 38 insertions(+)

--- a/drivers/net/phy/microchip.c
+++ b/drivers/net/phy/microchip.c
@@ -56,6 +56,24 @@ static int lan88xx_phy_ack_interrupt(str
 	return rc < 0 ? rc : 0;
 }
 
+static irqreturn_t lan88xx_handle_interrupt(struct phy_device *phydev)
+{
+	int irq_status;
+
+	irq_status = phy_read(phydev, LAN88XX_INT_STS);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	if (!(irq_status & LAN88XX_INT_STS_LINK_CHANGE_))
+		return IRQ_NONE;
+
+	phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
 static int lan88xx_suspend(struct phy_device *phydev)
 {
 	struct lan88xx_priv *priv = phydev->priv;
@@ -374,6 +392,7 @@ static struct phy_driver microchip_phy_d
 
 	.ack_interrupt	= lan88xx_phy_ack_interrupt,
 	.config_intr	= lan88xx_phy_config_intr,
+	.handle_interrupt = lan88xx_handle_interrupt,
 
 	.suspend	= lan88xx_suspend,
 	.resume		= genphy_resume,
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -203,6 +203,24 @@ static int lan87xx_phy_ack_interrupt(str
 	return rc < 0 ? rc : 0;
 }
 
+static irqreturn_t lan87xx_handle_interrupt(struct phy_device *phydev)
+{
+	int irq_status;
+
+	irq_status = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	if (irq_status == 0)
+		return IRQ_NONE;
+
+	phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
 static int lan87xx_config_init(struct phy_device *phydev)
 {
 	int rc = lan87xx_phy_init(phydev);
@@ -223,6 +241,7 @@ static struct phy_driver microchip_t1_ph
 
 		.ack_interrupt  = lan87xx_phy_ack_interrupt,
 		.config_intr    = lan87xx_phy_config_intr,
+		.handle_interrupt = lan87xx_handle_interrupt,
 
 		.suspend        = genphy_suspend,
 		.resume         = genphy_resume,