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generic: fix probe issues with RealTek RTL8221B PHYs
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Import patch "net: phy: realtek: mark existing MMDs as present"

    When using Clause-45 mode to access RealTek RTL8221B 2.5G PHYs some
    versions of the PHY fail to report the MMDs present on the PHY.
    Mark MMDs PMAPMD, PCS and AN which are always existing according to
    the datasheet as present to fix that.

Fixes: #16823, #17183, #17232
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Tested-by: Juan Pedro Paredes Caballero <juanpedro.paredes@gmail.com>
This commit is contained in:
Daniel Golle 2025-01-23 03:36:10 +00:00
parent 896d953c53
commit 730db6b893
1 changed files with 27 additions and 0 deletions
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27
target/linux/generic/pending-6.6/720-07-net-phy-realtek-mark-existing-MMDs-as-present.patch Normal file
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@ -0,0 +1,27 @@
From 1addfb042a9d27788a0fb2c2935045b56fd8560e Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Thu, 23 Jan 2025 03:25:29 +0000
Subject: [PATCH] net: phy: realtek: mark existing MMDs as present
When using Clause-45 mode to access RealTek RTL8221B 2.5G PHYs some
versions of the PHY fail to report the MMDs present on the PHY.
Mark MMDs PMAPMD, PCS and AN which are always existing according to
the datasheet as present to fix that.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/phy/realtek/realtek_main.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/net/phy/realtek/realtek_main.c
+++ b/drivers/net/phy/realtek/realtek_main.c
@@ -1034,6 +1034,9 @@ static int rtl822x_c45_get_features(stru
linkmode_set_bit(ETHTOOL_LINK_MODE_TP_BIT,
phydev->supported);
+ phydev->c45_ids.mmds_present |= MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
+ MDIO_DEVS_AN;
+
return genphy_c45_pma_read_abilities(phydev);
}