Commit 6ca81bbc31cd for kernel

commit 6ca81bbc31cdc964e4b74d17b86215d4a810a56f
Author: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
Date:   Tue Sep 8 19:59:58 2026 +0900

    net: phy: dp83td510: handle the active-high LED polarity mode

    dp83td510_led_polarity_set() only recognizes PHY_LED_ACTIVE_LOW, so
    PHY_LED_ACTIVE_HIGH falls through to the default case and returns -EINVAL.
    of_phy_led() propagates the error, of_phy_leds() drops the LEDs registered
    so far and passes it on, and phy_probe() returns it. A device tree marking
    a DP83TD510 LED as 'active-high', which leds/common.yaml allows and
    ethernet-phy.yaml references for led@N nodes, thus leaves the mdio device
    unbound, so phy_attach_direct() falls back to the genphy driver, which
    cannot drive this 10BASE-T1L single-mode PHY, so the interface has no
    usable link.

    The callback initializes polarity to DP83TD510E_LED_POLARITY(index), which
    is the active-high setting, so the request is already satisfied and only
    the case label is missing.

    Cc: stable@vger.kernel.org
    Fixes: 5b281fe7e396 ("net: phy: dp83td510: introduce LED framework support")
    Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
    Reviewed-by: Andrew Lunn <andrew@lunn.ch>
    Link: https://patch.msgid.link/20260908105959.70453-3-donggeunyoo.kernel@gmail.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/dp83td510.c b/drivers/net/phy/dp83td510.c
index d75dae6071ad..9e9a41bf6457 100644
--- a/drivers/net/phy/dp83td510.c
+++ b/drivers/net/phy/dp83td510.c
@@ -439,6 +439,9 @@ static int dp83td510_led_polarity_set(struct phy_device *phydev, int index,
 		case PHY_LED_ACTIVE_LOW:
 			polarity = 0;
 			break;
+		case PHY_LED_ACTIVE_HIGH:
+			polarity = DP83TD510E_LED_POLARITY(index);
+			break;
 		default:
 			return -EINVAL;
 		}