[PATCH 3/4] dt-bindings: nvmem: u-boot, env: add MAC's #nvmem-cell-cells

Rafał Miłecki
2023-02-22T17:24:11Z

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>
---
Documentation/devicetree/bindings/nvmem/u-boot,env.yaml | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
index cbc5c69fd405..36d97fb87865 100644
--- a/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
+++ b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
@@ -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>;
};
};
};
--
2.34.1