diff mbox series

[v2,net-next] net: phy: micrel: Adding interrupt support for Link up/Link down in LAN8814 Quad phy

Message ID 20211221112217.9502-1-Divya.Koppera@microchip.com (mailing list archive)
State Accepted
Commit b3ec7248f1f4b9d0352793b95d8ad063e89e9f6f
Delegated to: Netdev Maintainers
Headers show
Series [v2,net-next] net: phy: micrel: Adding interrupt support for Link up/Link down in LAN8814 Quad phy | expand

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Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 85 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Divya Koppera Dec. 21, 2021, 11:22 a.m. UTC 
This patch add support for Link up or Link down
interrupt support in LAN8814 Quad phy

Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>
---
v1 -> v2
* Defining Common Macro for Control and status bits of
  Link up, Link Down and sharing them across Interrupt
  control and Interrupt status registers.
---
 drivers/net/phy/micrel.c | 67 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

Comments

Andrew Lunn Dec. 21, 2021, 5:21 p.m. UTC | #1 
On Tue, Dec 21, 2021 at 04:52:17PM +0530, Divya Koppera wrote:
> This patch add support for Link up or Link down
> interrupt support in LAN8814 Quad phy
> 
> Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew
patchwork-bot+netdevbpf@kernel.org Dec. 22, 2021, 1:10 a.m. UTC | #2 
Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Tue, 21 Dec 2021 16:52:17 +0530 you wrote:
> This patch add support for Link up or Link down
> interrupt support in LAN8814 Quad phy
> 
> Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>
> ---
> v1 -> v2
> * Defining Common Macro for Control and status bits of
>   Link up, Link Down and sharing them across Interrupt
>   control and Interrupt status registers.
> 
> [...]

Here is the summary with links:
  - [v2,net-next] net: phy: micrel: Adding interrupt support for Link up/Link down in LAN8814 Quad phy
    https://git.kernel.org/netdev/net-next/c/b3ec7248f1f4

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 44a24b99c894..c6a97fcca0e6 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -66,6 +66,19 @@ 
 #define KSZ8081_LMD_SHORT_INDICATOR		BIT(12)
 #define KSZ8081_LMD_DELTA_TIME_MASK		GENMASK(8, 0)
 
+/* Lan8814 general Interrupt control/status reg in GPHY specific block. */
+#define LAN8814_INTC				0x18
+#define LAN8814_INTS				0x1B
+
+#define LAN8814_INT_LINK_DOWN			BIT(2)
+#define LAN8814_INT_LINK_UP			BIT(0)
+#define LAN8814_INT_LINK			(LAN8814_INT_LINK_UP |\
+						 LAN8814_INT_LINK_DOWN)
+
+#define LAN8814_INTR_CTRL_REG			0x34
+#define LAN8814_INTR_CTRL_REG_POLARITY		BIT(1)
+#define LAN8814_INTR_CTRL_REG_INTR_ENABLE	BIT(0)
+
 /* PHY Control 1 */
 #define MII_KSZPHY_CTRL_1			0x1e
 #define KSZ8081_CTRL1_MDIX_STAT			BIT(4)
@@ -1620,6 +1633,58 @@  static int lan8804_config_init(struct phy_device *phydev)
 	return 0;
 }
 
+static irqreturn_t lan8814_handle_interrupt(struct phy_device *phydev)
+{
+	int irq_status;
+
+	irq_status = phy_read(phydev, LAN8814_INTS);
+	if (irq_status < 0)
+		return IRQ_NONE;
+
+	if (!(irq_status & LAN8814_INT_LINK))
+		return IRQ_NONE;
+
+	phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
+static int lan8814_ack_interrupt(struct phy_device *phydev)
+{
+	/* bit[12..0] int status, which is a read and clear register. */
+	int rc;
+
+	rc = phy_read(phydev, LAN8814_INTS);
+
+	return (rc < 0) ? rc : 0;
+}
+
+static int lan8814_config_intr(struct phy_device *phydev)
+{
+	int err;
+
+	lanphy_write_page_reg(phydev, 4, LAN8814_INTR_CTRL_REG,
+			      LAN8814_INTR_CTRL_REG_POLARITY |
+			      LAN8814_INTR_CTRL_REG_INTR_ENABLE);
+
+	/* enable / disable interrupts */
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+		err = lan8814_ack_interrupt(phydev);
+		if (err)
+			return err;
+
+		err =  phy_write(phydev, LAN8814_INTC, LAN8814_INT_LINK);
+	} else {
+		err =  phy_write(phydev, LAN8814_INTC, 0);
+		if (err)
+			return err;
+
+		err = lan8814_ack_interrupt(phydev);
+	}
+
+	return err;
+}
+
 static struct phy_driver ksphy_driver[] = {
 {
 	.phy_id		= PHY_ID_KS8737,
@@ -1802,6 +1867,8 @@  static struct phy_driver ksphy_driver[] = {
 	.get_stats	= kszphy_get_stats,
 	.suspend	= genphy_suspend,
 	.resume		= kszphy_resume,
+	.config_intr	= lan8814_config_intr,
+	.handle_interrupt = lan8814_handle_interrupt,
 }, {
 	.phy_id		= PHY_ID_LAN8804,
 	.phy_id_mask	= MICREL_PHY_ID_MASK,