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[4/5] ARM: dts: BCM5301X: Retrieve gmac1 MAC address from NVRAM on Asus RT-AC88U

Message ID 20220401102002.15765-4-arinc.unal@arinc9.com (mailing list archive)
State New, archived
Headers show
Series [1/5] ARM: dts: BCM5301X: Fix DTC warning for NAND node | expand

Commit Message

Arınç ÜNAL April 1, 2022, 10:20 a.m. UTC
The et1macaddr NVRAM variable contains a MAC address for gmac1 on Asus
RT-AC88U. Add NVMEM cell for it and reference it in the gmac1 node.

The Broadcom GBit BCMA driver will issue the MAC address for gmac{0,1,2}
retrieved from et{0,1,2}mac from SPROM without this but let's explicitly
define it as mac-address on the devicetree.
Refer to drivers/net/ethernet/broadcom/bgmac-bcma.c:147.

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 arch/arm/boot/dts/bcm47094-asus-rt-ac88u.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Rafał Miłecki April 1, 2022, 10:32 a.m. UTC | #1
On 2022-04-01 12:20, Arınç ÜNAL wrote:
> The et1macaddr NVRAM variable contains a MAC address for gmac1 on Asus
> RT-AC88U. Add NVMEM cell for it and reference it in the gmac1 node.
> 
> The Broadcom GBit BCMA driver will issue the MAC address for 
> gmac{0,1,2}
> retrieved from et{0,1,2}mac from SPROM without this but let's 
> explicitly
> define it as mac-address on the devicetree.
> Refer to drivers/net/ethernet/broadcom/bgmac-bcma.c:147.

It doesn't matter how Linux handles that in details. You're working on
hardware binding.

Change is OK of course.

If you need to reference sth it should be
Documentation/devicetree/bindings/net/ethernet-controller.yaml


> Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>

I'd drop bgmac-bcma.c reference but nevertheless:

Acked-by: Rafał Miłecki <rafal@milecki.pl>
Florian Fainelli April 4, 2022, 6:36 p.m. UTC | #2
On Fri,  1 Apr 2022 13:20:01 +0300, Arınç ÜNAL <arinc.unal@arinc9.com> wrote:
> The et1macaddr NVRAM variable contains a MAC address for gmac1 on Asus
> RT-AC88U. Add NVMEM cell for it and reference it in the gmac1 node.
> 
> The Broadcom GBit BCMA driver will issue the MAC address for gmac{0,1,2}
> retrieved from et{0,1,2}mac from SPROM without this but let's explicitly
> define it as mac-address on the devicetree.
> Refer to drivers/net/ethernet/broadcom/bgmac-bcma.c:147.
> 
> Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
> ---

Applied to https://github.com/Broadcom/stblinux/commits/devicetree/next, thanks!
--
Florian
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/bcm47094-asus-rt-ac88u.dts b/arch/arm/boot/dts/bcm47094-asus-rt-ac88u.dts
index 5696dd5fbaf4..2f944d1c0330 100644
--- a/arch/arm/boot/dts/bcm47094-asus-rt-ac88u.dts
+++ b/arch/arm/boot/dts/bcm47094-asus-rt-ac88u.dts
@@ -25,6 +25,9 @@  memory@0 {
 	nvram@1c080000 {
 		compatible = "brcm,nvram";
 		reg = <0x1c080000 0x00180000>;
+
+		et1macaddr: et1macaddr {
+		};
 	};
 
 	leds {
@@ -239,6 +242,11 @@  fixed-link {
 	};
 };
 
+&gmac1 {
+	nvmem-cells = <&et1macaddr>;
+	nvmem-cell-names = "mac-address";
+};
+
 &usb2 {
 	vcc-gpio = <&chipcommon 9 GPIO_ACTIVE_HIGH>;
 };