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generic: 6.6: fix realtek PHY detection patch 

Avoid crashing the kernel when trying to detect early versions of
RealTek RTL8221B 2.5G Ethernet PHY.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2024-03-02 04:48:08 +00:00 committed by Robert Marko
parent 7acb8203c2
commit f6c27b22f6
2 changed files with 37 additions and 10 deletions
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43
target/linux/generic/pending-6.6/730-net-phy-realtek-detect-early-version-of-RTL8221B.patch
View File

@ -1,4 +1,4 @@
From 0de82310d2b32e78ff79d42c08b1122a6ede3778 Mon Sep 17 00:00:00 2001
From e52faf1564a8bcaf866f9a6c7bf0e8a8748afb15 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Sun, 30 Apr 2023 00:15:41 +0100
Subject: [PATCH] net: phy: realtek: detect early version of RTL8221B
@ -10,11 +10,22 @@ Implement custom identify function using the PKGID instead of iterating
over the implemented MMDs.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/phy/realtek.c | 50 ++++++++++++++++++++++++++++++++++++++-
1 file changed, 49 insertions(+), 1 deletion(-)
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -782,6 +782,38 @@ static int rtl8226_match_phy_device(stru
rtlgen_supports_2_5gbps(phydev);
@@ -81,6 +81,7 @@
#define RTL_GENERIC_PHYID 0x001cc800
#define RTL_8211FVD_PHYID 0x001cc878
+#define RTL_8221B_VB_CG 0x001cc849
MODULE_DESCRIPTION("Realtek PHY driver");
MODULE_AUTHOR("Johnson Leung");
@@ -801,6 +802,54 @@ static int rtl822x_probe(struct phy_devi
return 0;
}
+static int rtl8221b_vb_cg_match_phy_device(struct phy_device *phydev)
@ -22,7 +33,15 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+ int val;
+ u32 id;
+
+ if (phydev->drv->read_mmd) {
+ if (phydev->is_c45) {
+ if (phydev->c45_ids.device_ids[1])
+ return phydev->c45_ids.device_ids[1] == RTL_8221B_VB_CG;
+ } else {
+ if (phydev->phy_id)
+ return phydev->phy_id == RTL_8221B_VB_CG;
+ }
+
+ if (phydev->mdio.bus->read_c45) {
+ val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PKGID1);
+ if (val < 0)
+ return 0;
@ -46,13 +65,21 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+ id |= val;
+ }
+
+ return (id == 0x001cc849);
+ if (id != RTL_8221B_VB_CG)
+ return 0;
+
+ if (phydev->is_c45)
+ phydev->c45_ids.device_ids[1] = id;
+ else
+ phydev->phy_id = id;
+
+ return 1;
+}
+
static int rtl822x_probe(struct phy_device *phydev)
static int rtlgen_resume(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
@@ -1134,7 +1166,7 @@ static struct phy_driver realtek_drvs[]
int ret = genphy_resume(phydev);
@@ -1134,7 +1183,7 @@ static struct phy_driver realtek_drvs[]
.write_page = rtl821x_write_page,
.soft_reset = genphy_soft_reset,
}, {

4
target/linux/generic/pending-6.6/741-net-phy-realtek-support-interrupt-of-RTL8221B.patch
View File

@ -1,6 +1,6 @@
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -1009,6 +1009,51 @@ static int rtl8221b_config_init(struct p
@@ -1026,6 +1026,51 @@ static int rtl8221b_config_init(struct p
return 0;
}
@ -52,7 +52,7 @@
static struct phy_driver realtek_drvs[] = {
{
PHY_ID_MATCH_EXACT(0x00008201),
@@ -1171,6 +1216,8 @@ static struct phy_driver realtek_drvs[]
@@ -1188,6 +1233,8 @@ static struct phy_driver realtek_drvs[]
.get_features = rtl822x_get_features,
.config_init = rtl8221b_config_init,
.config_aneg = rtl822x_config_aneg,