[PATCH 1/3] dt-bindings: nvmem: brcm,nvram: add #nvmem-cell-cells for MACs

[Rob Herring]

On Thu, Apr 06, 2023 at 01:08:02PM +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal at milecki.pl>
> 
> Broadcom's NVRAM contains MACs for Ethernet interfaces. Those MACs are
> usually base addresses that are also used for calculating other MACs.
> 
> For example if a router vendor decided to use gmac0 it most likely
> programmed NVRAM of each unit with a proper "et0macaddr" value. That is
> a base.
> 
> Ethernet interface is usually connected to switch port. Switch usually
> includes few LAN ports and a WAN port. MAC of WAN port gets calculated
> as relative address to the interface one. Offset varies depending on
> device model.
> 
> Wireless MACs may also need to be calculated using relevant offsets.
> 
> To support all those scenarios let MAC NVMEM cells be referenced with an
> index specifying MAC offset.
> 
> Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
> ---
>  .../devicetree/bindings/nvmem/brcm,nvram.yaml        | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
> index 36def7128fca..a921e05cc544 100644
> --- a/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
> +++ b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
> @@ -36,14 +36,26 @@ properties:
>    et0macaddr:
>      type: object
>      description: First Ethernet interface's MAC address
> +    properties:
> +      "#nvmem-cell-cells":
> +        description: The first argument is a MAC address offset.
> +        const: 1

Not a new issue, but these nodes are missing 'additionalProperties: 
false'. Can you add that. With that,

Reviewed-by: Rob Herring <robh at kernel.org>