* [PATCH] ARM: dts: BCM5301X: SR400AC: set WAN MAC from nvram
@ 2026-07-27 20:28 Rosen Penev
2026-07-30 23:26 ` Florian Fainelli
0 siblings, 1 reply; 2+ messages in thread
From: Rosen Penev @ 2026-07-27 20:28 UTC (permalink / raw)
To: devicetree
Cc: Florian Fainelli, Hauke Mehrtens, Rafał Miłecki,
Broadcom internal kernel review list, Rob Herring,
Krzysztof Kozlowski, Conor Dooley,
moderated list:BROADCOM BCM5301X ARM ARCHITECTURE, open list
The WAN MAC is offset by 1. Set in dts to avoid having to handle this in
userspace.
nvram size found from a random bootlog online.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
.../dts/broadcom/bcm4708-smartrg-sr400ac.dts | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/arm/boot/dts/broadcom/bcm4708-smartrg-sr400ac.dts b/arch/arm/boot/dts/broadcom/bcm4708-smartrg-sr400ac.dts
index b226bef3369c..03f4a6d37a67 100644
--- a/arch/arm/boot/dts/broadcom/bcm4708-smartrg-sr400ac.dts
+++ b/arch/arm/boot/dts/broadcom/bcm4708-smartrg-sr400ac.dts
@@ -25,6 +25,16 @@ memory@0 {
<0x88000000 0x08000000>;
};
+ nvram@1eff0000 {
+ compatible = "brcm,nvram";
+ reg = <0x1eff0000 0x10000>;
+
+ et0macaddr: et0macaddr {
+ #nvmem-cell-cells = <1>;
+ };
+ };
+
+
leds {
compatible = "gpio-leds";
@@ -118,6 +128,11 @@ &spi_nor {
status = "okay";
};
+&gmac0 {
+ nvmem-cells = <&et0macaddr 0>;
+ nvmem-cell-names = "mac-address";
+};
+
&srab {
status = "okay";
@@ -140,6 +155,9 @@ port@3 {
port@4 {
label = "wan";
+
+ nvmem-cells = <&et0macaddr 1>;
+ nvmem-cell-names = "mac-address";
};
port@5 {
--
2.55.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] ARM: dts: BCM5301X: SR400AC: set WAN MAC from nvram
2026-07-27 20:28 [PATCH] ARM: dts: BCM5301X: SR400AC: set WAN MAC from nvram Rosen Penev
@ 2026-07-30 23:26 ` Florian Fainelli
0 siblings, 0 replies; 2+ messages in thread
From: Florian Fainelli @ 2026-07-30 23:26 UTC (permalink / raw)
To: bcm-kernel-feedback-list, Rosen Penev, devicetree
Cc: Florian Fainelli, Hauke Mehrtens, Rafał Miłecki,
Rob Herring, Krzysztof Kozlowski, Conor Dooley,
moderated list:BROADCOM BCM5301X ARM ARCHITECTURE, open list
From: Florian Fainelli <f.fainelli@gmail.com>
On Mon, 27 Jul 2026 13:28:17 -0700, Rosen Penev <rosenp@gmail.com> wrote:
> The WAN MAC is offset by 1. Set in dts to avoid having to handle this in
> userspace.
>
> nvram size found from a random bootlog online.
>
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
Applied to https://github.com/Broadcom/stblinux/commits/devicetree/next, thanks!
--
Florian
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2026-07-27 20:28 [PATCH] ARM: dts: BCM5301X: SR400AC: set WAN MAC from nvram Rosen Penev
2026-07-30 23:26 ` Florian Fainelli
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