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[V3,5/6] dt-bindings: nvmem: u-boot,env: add MAC's #nvmem-cell-cells

Message ID 20230127125709.32191-5-zajec5@gmail.com
State Superseded
Headers show
Series [V3,1/6] nvmem: core: add nvmem_dev_size() helper | expand

Commit Message

Rafał Miłecki Jan. 27, 2023, 12:57 p.m. UTC 
From: Rafał Miłecki <rafal@milecki.pl>

U-Boot's "ethaddr" environment variable is very often used to store
*base* MAC address. It's used as a base for calculating addresses for
multiple interfaces. It's done by adding proper values. Actual offsets
are picked by manufacturers and vary across devices.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/nvmem/layouts/u-boot,env.yaml      | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml b/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
index fb273b174fe7..dbff702f2e5d 100644
--- a/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
+++ b/Documentation/devicetree/bindings/nvmem/layouts/u-boot,env.yaml
@@ -45,7 +45,11 @@  properties:
 
   ethaddr:
     type: object
-    description: Ethernet interface's MAC address
+    description: Ethernet interfaces base MAC address.
+    properties:
+      "#nvmem-cell-cells":
+        description: The first argument is a MAC address offset.
+        const: 1
 
 additionalProperties: false
 
@@ -69,6 +73,7 @@  examples:
                 compatible = "u-boot,env";
 
                 mac: ethaddr {
+                    #nvmem-cell-cells = <1>;
                 };
             };
         };