bcm-ns.dtsi specifies a default layout that is not correct for the
RT-AC87U. Also allows setting the WAN MAC address properly.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 .../dts/broadcom/bcm4709-asus-rt-ac87u.dts    | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm/boot/dts/broadcom/bcm4709-asus-rt-ac87u.dts b/arch/arm/boot/dts/broadcom/bcm4709-asus-rt-ac87u.dts
index 59400217f8c3..f48c44ff01c0 100644
--- a/arch/arm/boot/dts/broadcom/bcm4709-asus-rt-ac87u.dts
+++ b/arch/arm/boot/dts/broadcom/bcm4709-asus-rt-ac87u.dts
@@ -77,6 +77,43 @@ &usb3_phy {
 	status = "okay";
 };
 
+&srab {
+	status = "okay";
+
+	ports {
+		port@0 {
+			label = "wan";
+
+			nvmem-cells = <&et1macaddr 1>;
+			nvmem-cell-names = "mac-address";
+		};
+
+		port@1 {
+			label = "lan1";
+		};
+
+		port@2 {
+			label = "lan2";
+		};
+
+		port@3 {
+			label = "lan3";
+		};
+
+		port@5 {
+			status = "disabled";
+		};
+
+		port@7 {
+			label = "cpu";
+		};
+
+		port@8 {
+			status = "disabled";
+		};
+	};
+};
+
 &nandcs {
 	partitions {
 		compatible = "fixed-partitions";
-- 
2.53.0

pt., 20 lut 2026 o 03:14 Rosen Penev <rosenp@gmail.com> napisał(a):
> bcm-ns.dtsi specifies a default layout that is not correct for the
> RT-AC87U. Also allows setting the WAN MAC address properly.

How the basic ports info from bcm-ns.dtsi is not correct for RT-AC87U?
I don't see you doing any overwriting or /delete-node/. It seems like
a standard NS device with BCM53011 and 8 ports (0, 1, 2, 3, 4, 5, 7,
8), three of them connected to no-SoC Ethernet interfaces.

Except for this unclear commit description, your changes look good, thanks!

-- 
Rafał

On Fri, Feb 20, 2026 at 3:18 AM Rafał Miłecki <zajec5@gmail.com> wrote:
>
> pt., 20 lut 2026 o 03:14 Rosen Penev <rosenp@gmail.com> napisał(a):
> > bcm-ns.dtsi specifies a default layout that is not correct for the
> > RT-AC87U. Also allows setting the WAN MAC address properly.
>
> How the basic ports info from bcm-ns.dtsi is not correct for RT-AC87U?
> I don't see you doing any overwriting or /delete-node/. It seems like
> a standard NS device with BCM53011 and 8 ports (0, 1, 2, 3, 4, 5, 7,
> 8), three of them connected to no-SoC Ethernet interfaces.
This comes from a local OpenWrt patch. I just added the nvmem
definition for WAN.

There's also the addition of labels.
>
> Except for this unclear commit description, your changes look good, thanks!
>
> --
> Rafał

pt., 20 lut 2026 o 22:18 Rosen Penev <rosenp@gmail.com> napisał(a):
> On Fri, Feb 20, 2026 at 3:18 AM Rafał Miłecki <zajec5@gmail.com> wrote:
> > pt., 20 lut 2026 o 03:14 Rosen Penev <rosenp@gmail.com> napisał(a):
> > > bcm-ns.dtsi specifies a default layout that is not correct for the
> > > RT-AC87U. Also allows setting the WAN MAC address properly.
> >
> > How the basic ports info from bcm-ns.dtsi is not correct for RT-AC87U?
> > I don't see you doing any overwriting or /delete-node/. It seems like
> > a standard NS device with BCM53011 and 8 ports (0, 1, 2, 3, 4, 5, 7,
> > 8), three of them connected to no-SoC Ethernet interfaces.
> This comes from a local OpenWrt patch. I just added the nvmem
> definition for WAN.
>
> There's also the addition of labels.

Then I guess someone else didn't try hard enough for proper
description. It happens with downstream code. Sometimes it suffers
from lower quality & hacks.

When submitting for upstream you can improve it though :-) You can
(and rather should) reword commit description so it's accurate.

-- 
Rafał