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34 lines
1.3 KiB
Diff
34 lines
1.3 KiB
Diff
From: Daniel Golle <daniel@makrotopia.org>
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Date: Thu, 30 Jan 2025 05:38:31 +0000
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Subject: [PATCH] net: phy: realtek: disable MDIO broadcast
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RealTek's PHYs by default also listen on MDIO address 0 which is defined
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as broadcast address. This can lead to problems if there is an actual PHY
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(such as MT7981 built-in PHY) present at this address, as accessing that
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PHY may then confuse the RealTek PHY.
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Disabled listening on the MDIO broadcast address to avoid such problems.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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--- a/drivers/net/phy/realtek/realtek_main.c
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+++ b/drivers/net/phy/realtek/realtek_main.c
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@@ -132,6 +132,7 @@
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#define RTL8221B_PHYCR1 0xa430
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#define RTL8221B_PHYCR1_ALDPS_EN BIT(2)
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#define RTL8221B_PHYCR1_ALDPS_XTAL_OFF_EN BIT(12)
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+#define RTL8221B_PHYCR1_PHYAD_0_EN BIT(13)
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#define RTL8366RB_POWER_SAVE 0x15
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#define RTL8366RB_POWER_SAVE_ON BIT(12)
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@@ -1062,7 +1063,8 @@ static int rtl822x_init_phycr1(struct ph
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return phy_modify_mmd_changed(phydev, MDIO_MMD_VEND2, RTL8221B_PHYCR1,
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RTL8221B_PHYCR1_ALDPS_EN |
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- RTL8221B_PHYCR1_ALDPS_XTAL_OFF_EN, val);
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+ RTL8221B_PHYCR1_ALDPS_XTAL_OFF_EN |
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+ RTL8221B_PHYCR1_PHYAD_0_EN, val);
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}
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static int rtl822xb_config_init(struct phy_device *phydev)
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