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

Rafał Miłecki
2023-01-27T12:57:38Z

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(-)

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>;
};
};
};
--
2.34.1