linux-kernel - [PATCH net-next 05/15] net: phy: meson-gxl: implement generic .handle

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Message-Id: <20201123153817.1616814-6-ciorneiioana@gmail.com>
Date:   Mon, 23 Nov 2020 17:38:07 +0200
From:   Ioana Ciornei <ciorneiioana@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Ioana Ciornei <ioana.ciornei@....com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>
Subject: [PATCH net-next 05/15] net: phy: meson-gxl: implement generic .handle_interrupt() callback

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

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: Jerome Brunet <jbrunet@...libre.com>
Cc: Neil Armstrong <narmstrong@...libre.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 drivers/net/phy/meson-gxl.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c
index e8f2ca625837..b16b1cc89165 100644
--- a/drivers/net/phy/meson-gxl.c
+++ b/drivers/net/phy/meson-gxl.c
@@ -222,6 +222,24 @@ static int meson_gxl_config_intr(struct phy_device *phydev)
 	return phy_write(phydev, INTSRC_MASK, val);
 }
 
+static irqreturn_t meson_gxl_handle_interrupt(struct phy_device *phydev)
+{
+	int irq_status;
+
+	irq_status = phy_read(phydev, INTSRC_FLAG);
+	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 struct phy_driver meson_gxl_phy[] = {
 	{
 		PHY_ID_MATCH_EXACT(0x01814400),
@@ -233,6 +251,7 @@ static struct phy_driver meson_gxl_phy[] = {
 		.read_status	= meson_gxl_read_status,
 		.ack_interrupt	= meson_gxl_ack_interrupt,
 		.config_intr	= meson_gxl_config_intr,
+		.handle_interrupt = meson_gxl_handle_interrupt,
 		.suspend        = genphy_suspend,
 		.resume         = genphy_resume,
 	}, {
@@ -243,6 +262,7 @@ static struct phy_driver meson_gxl_phy[] = {
 		.soft_reset     = genphy_soft_reset,
 		.ack_interrupt	= meson_gxl_ack_interrupt,
 		.config_intr	= meson_gxl_config_intr,
+		.handle_interrupt = meson_gxl_handle_interrupt,
 		.suspend        = genphy_suspend,
 		.resume         = genphy_resume,
 	},
-- 
2.28.0