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dt-bindings: nvmem: u-boot,env: add MAC's #nvmem-cell-cells

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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>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230404172148.82422-34-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rafał Miłecki 2023-04-04 18:21:41 +01:00 committed by Greg Kroah-Hartman
parent c2367aa60d
commit 7e2805c203
1 changed files with 6 additions and 1 deletions
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7
Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
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@ -50,7 +50,11 @@ 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
@ -72,6 +76,7 @@ examples:
reg = <0x40000 0x10000>;
mac: ethaddr {
#nvmem-cell-cells = <1>;
};
};
};