net: phy: introduce optional polling interface for PHY statistics

Add an optional polling interface for PHY statistics to simplify driver
implementation.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 508f3ae3240f..c008fe050245 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1442,6 +1442,23 @@ static int phy_enable_interrupts(struct phy_device *phydev)
 }
 
 /**
+ * phy_update_stats - Update PHY device statistics if supported.
+ * @phydev: Pointer to the PHY device structure.
+ *
+ * If the PHY driver provides an update_stats callback, this function
+ * invokes it to update the PHY statistics. If not, it returns 0.
+ *
+ * Return: 0 on success, or a negative error code if the callback fails.
+ */
+static int phy_update_stats(struct phy_device *phydev)
+{
+	if (!phydev->drv->update_stats)
+		return 0;
+
+	return phydev->drv->update_stats(phydev);
+}
+
+/**
  * phy_request_interrupt - request and enable interrupt for a PHY device
  * @phydev: target phy_device struct
  *
@@ -1510,6 +1527,9 @@ static enum phy_state_work _phy_state_machine(struct phy_device *phydev)
 	case PHY_RUNNING:
 		err = phy_check_link_status(phydev);
 		func = &phy_check_link_status;
+
+		if (!err)
+			err = phy_update_stats(phydev);
 		break;
 	case PHY_CABLETEST:
 		err = phydev->drv->cable_test_get_status(phydev, &finished);