linux-kernel - Re: [PATCH] dt-bindings: mtd: partitions: make partition an NVMEM provider

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Date: Fri, 19 Jan 2024 16:33:56 -0600
From: Rob Herring <robh@...nel.org>
To: Rafał Miłecki <zajec5@...il.com>
Cc: Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Ansuel Smith <ansuelsmth@...il.com>, linux-mtd@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH] dt-bindings: mtd: partitions: make partition an NVMEM
 provider

On Thu, Jan 11, 2024 at 01:19:40PM +0100, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> MTD partition provides flash device data and can be used as NVMEM
> device.

I don't follow what is the relationship between this and your other 
series.

> 
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
>  .../bindings/mtd/partitions/partition.yaml       | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/partitions/partition.yaml b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml
> index 1ebe9e2347ea..7b1d84ce5ef5 100644
> --- a/Documentation/devicetree/bindings/mtd/partitions/partition.yaml
> +++ b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml
> @@ -57,13 +57,15 @@ properties:
>        user space from
>      type: boolean
>  
> -if:
> -  not:
> -    required: [ reg ]
> -then:
> -  properties:
> -    $nodename:
> -      pattern: '^partition-.*$'
> +allOf:
> +  - $ref: /schemas/nvmem/nvmem.yaml

Only some partitions are nvmem nodes, so we shouldn't always include it. 
Then we can't exclude nvmem properties from partition nodes which 
aren't. We should identify those nodes by compatible and their schema 
should reference partition.yaml and nvmem.yaml.

There's a general problem with the partition related schemas that 
undefined properties are not caught. This is partly because 
partition nodes can be nested and expressing that with the schema is 
hard.

Rob