netdev - [PATCH v1 2/3] net: phy: micrel: add flag for KSZ9477 LED erratum

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Message-ID: <20260128133842.1173406-3-ht@twx-software.de>
Date: Wed, 28 Jan 2026 14:38:32 +0100
From: Heinrich Toews <ht@...-software.de>
To: netdev@...r.kernel.org
Cc: andrew@...n.ch,
	f.fainelli@...il.com,
	olteanv@...il.com,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org
Subject: [PATCH v1 2/3] net: phy: micrel: add flag for KSZ9477 LED erratum

Add a new flag MICREL_KSZ9_LED_ERRATA to indicate support for a specific
LED erratum workaround on Microchip KSZ9477 switches. This flag
will be used by the DSA driver to trigger a hardware-specific register
write required for correct LED activity in single-LED mode.

Signed-off-by: Heinrich Toews <ht@...-software.de>
---
 include/linux/micrel_phy.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h
index ca691641788b8..1dcbb0c93d9e1 100644
--- a/include/linux/micrel_phy.h
+++ b/include/linux/micrel_phy.h
@@ -45,6 +45,7 @@
 #define MICREL_PHY_50MHZ_CLK	BIT(0)
 #define MICREL_PHY_FXEN		BIT(1)
 #define MICREL_KSZ8_P1_ERRATA	BIT(2)
+#define MICREL_KSZ9_LED_ERRATA	BIT(3)
 
 #define MICREL_KSZ9021_EXTREG_CTRL	0xB
 #define MICREL_KSZ9021_EXTREG_DATA_WRITE	0xC
-- 
2.52.0