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qualcommax: ipq807x: 301w: read the port MAC addresses from ART

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The board names its six ports through ethernetN aliases for the bootloader
to patch an address into, and since the PPE conversion only the first two
arrive. On r35301-d47ce71a89, the last snapshot before it, every port came
up on an address of its own; on r35323-7ff96bf05c, the first one after,
lan1, lan2, 10g-1 and 10g-2 have none and inherit the conduit's, so four
ports and the bridge above them all answer to one MAC.

The addresses the bootloader hands out come from the MAC table at the start
of 0:art, one 6-byte slot per ethernetN alias. Describe those slots, so the
ports can read them whatever the bootloader does. ipq8071-ax3600.dtsi
describes its own ART table the same way.

The mapping is confirmed on a 301w: the table holds 24:5e:be:55:69:32
through :37 in slots 0 to 5 and nothing else, and the pre-conversion
snapshot brought up each port on the slot its alias names - lan4 on :32,
lan3 :33, lan2 :34, lan1 :35, 10g-1 :36, 10g-2 :37.

of_get_mac_address() consults the DT properties before the nvmem cell, so
a port the bootloader patched keeps the address it has.

Fixes: f50435627d ("qualcommax: ipq60xx/ipq807x: convert to PPE networking stack")
Assisted-by: Claude:claude-opus-5
Signed-off-by: Julius Bairaktaris <julius@bairaktaris.de>
Link: https://github.com/openwrt/openwrt/pull/24528
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Julius Bairaktaris
2026-09-07 19:02:29 +02:00
committed by Robert Marko
parent 29c5542cd6
commit 3b35c7074a
1 changed files with 42 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
target/linux/qualcommax/dts/ipq8072-301w.dts
+42
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@@ -322,6 +322,36 @@
label = "0:art";
reg = <0x370000 0x40000>;
read-only;
nvmem-layout {
compatible = "fixed-layout";
#address-cells = <1>;
#size-cells = <1>;
macaddr_lan4: macaddr@0 {
reg = <0x0 0x6>;
};
macaddr_lan3: macaddr@6 {
reg = <0x6 0x6>;
};
macaddr_lan2: macaddr@c {
reg = <0xc 0x6>;
};
macaddr_lan1: macaddr@12 {
reg = <0x12 0x6>;
};
macaddr_10g_1: macaddr@18 {
reg = <0x18 0x6>;
};
macaddr_10g_2: macaddr@1e {
reg = <0x1e 0x6>;
};
};
};
partition@3b0000 {
@@ -466,6 +496,8 @@
phy-handle = <&qca8075_16>;
phy-mode = "qsgmii";
pcs-handle = <&uniphy0 0>;
nvmem-cells = <&macaddr_lan4>;
nvmem-cell-names = "mac-address";
};
lan3: port@2 {
@@ -474,6 +506,8 @@
phy-handle = <&qca8075_17>;
phy-mode = "qsgmii";
pcs-handle = <&uniphy0 1>;
nvmem-cells = <&macaddr_lan3>;
nvmem-cell-names = "mac-address";
};
lan2: port@3 {
@@ -482,6 +516,8 @@
phy-handle = <&qca8075_18>;
phy-mode = "qsgmii";
pcs-handle = <&uniphy0 2>;
nvmem-cells = <&macaddr_lan2>;
nvmem-cell-names = "mac-address";
};
@@ -491,6 +527,8 @@
phy-handle = <&qca8075_19>;
phy-mode = "qsgmii";
pcs-handle = <&uniphy0 3>;
nvmem-cells = <&macaddr_lan1>;
nvmem-cell-names = "mac-address";
};
port_10g_1: port@5 {
@@ -500,6 +538,8 @@
phy-mode = "usxgmii";
managed = "in-band-status";
pcs-handle = <&uniphy1 0>;
nvmem-cells = <&macaddr_10g_1>;
nvmem-cell-names = "mac-address";
};
port_10g_2: port@6 {
@@ -509,6 +549,8 @@
phy-mode = "usxgmii";
managed = "in-band-status";
pcs-handle = <&uniphy2 0>;
nvmem-cells = <&macaddr_10g_2>;
nvmem-cell-names = "mac-address";
};
};
};