linux-kernel - [PATCH net-next 1/3] dt-bindings: net: add nvmem-mac-address-offset property

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Date:   Wed, 14 Apr 2021 17:26:55 +0200
From:   Michael Walle <michael@...le.cc>
To:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Frank Rowand <frowand.list@...il.com>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH net-next 1/3] dt-bindings: net: add nvmem-mac-address-offset property

It is already possible to read the MAC address via a NVMEM provider. But
there are boards, esp. with many ports, which only have a base MAC
address stored. Thus we need to have a way to provide an offset per
network device.

Signed-off-by: Michael Walle <michael@...le.cc>
---
 .../devicetree/bindings/net/ethernet-controller.yaml        | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
index e8f04687a3e0..1a8517b0e445 100644
--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -52,6 +52,12 @@ properties:
   nvmem-cell-names:
     const: mac-address
 
+  nvmem-mac-address-offset:
+    maxItems: 1
+    description:
+      Specifies an offset which will be added to the MAC address when
+      fetched from a nvmem cell.
+
   phy-connection-type:
     description:
       Specifies interface type between the Ethernet device and a physical
-- 
2.20.1