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(-)
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>; }; }; };