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

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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: 5b281fe7e3 ("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>
This commit is contained in:
Donggeun Yoo 2026-09-08 19:59:58 +09:00 committed by Jakub Kicinski
parent e1406330d7
commit 6ca81bbc31
1 changed files with 3 additions and 0 deletions
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3
drivers/net/phy/dp83td510.c
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@ -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;
}