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0866dba045
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.
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>
53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
From 0de82310d2b32e78ff79d42c08b1122a6ede3778 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Sun, 30 Apr 2023 00:15:41 +0100
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Subject: [PATCH] net: phy: realtek: detect early version of RTL8221B
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Early versions (?) of the RTL8221B PHY cannot be identified in a regular
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Clause-45 bus scan as the PHY doesn't report the implemented MMDs
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correctly but returns 0 instead.
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Implement custom identify function using the PKGID instead of iterating
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over the implemented MMDs.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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[forward-port by @namiltd]
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Signed-off-by: Mieczyslaw Nalewaj <namiltd@yahoo.com>
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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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@@ -1166,10 +1166,32 @@ static int rtl8226_match_phy_device(stru
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static int rtlgen_is_c45_match(struct phy_device *phydev, unsigned int id,
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bool is_c45)
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{
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- if (phydev->is_c45)
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- return is_c45 && (id == phydev->c45_ids.device_ids[1]);
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- else
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+ if (phydev->is_c45) {
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+ u32 rid;
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+
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+ if (!is_c45)
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+ return 0;
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+
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+ rid = phydev->c45_ids.device_ids[1];
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+ if ((rid == 0xffffffff) && phydev->mdio.bus->read_c45) {
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+ int val;
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+
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+ val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PKGID1);
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+ if (val < 0)
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+ return 0;
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+
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+ rid = val << 16;
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+ val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PKGID2);
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+ if (val < 0)
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+ return 0;
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+
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+ rid |= val;
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+ }
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+
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+ return (id == rid);
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+ } else {
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return !is_c45 && (id == phydev->phy_id);
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+ }
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}
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static int rtl8221b_match_phy_device(struct phy_device *phydev)
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