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SubjectRe: [RFC PATCH 1/2] dt-bindings: mtd: partitions: Document new dynamic-partitions node
On Thu, Jan 20, 2022 at 09:26:14PM +0100, Ansuel Smith wrote:
> Document new dynamic-partitions node used to provide an of node for
> partition registred at runtime by parsers. This is required for nvmem
> system to declare and detect nvmem-cells.

So you have some discoverable way to find all the partitions and the
nvmem cells are at an unknown (to the DT) location, but still need to be
described in DT?

> Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
> ---
> .../mtd/partitions/dynamic-partitions.yaml | 59 +++++++++++++++++++
> 1 file changed, 59 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/partitions/dynamic-partitions.yaml
>
> diff --git a/Documentation/devicetree/bindings/mtd/partitions/dynamic-partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/dynamic-partitions.yaml
> new file mode 100644
> index 000000000000..7528e49f2d7e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/partitions/dynamic-partitions.yaml
> @@ -0,0 +1,59 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/partitions/dynamic-partitions.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Dynamic partitions
> +
> +description: |
> + This binding can be used on platforms which have partitions registered at
> + runtime by parsers or partition table present on the flash. Example are
> + partitions declared from smem parser or cmdlinepart. This will create an

Some information in DT and some on the cmdline seems broken to me. Pick
one or the other.

> + of node for these dynamic partition where systems like Nvmem can get a
> + reference to register nvmem-cells.
> +
> + The partition table should be a node named "dynamic-partitions".
> + Partitions are then defined as subnodes. Only the label is required
> + as any other data will be taken from the parser.
> +
> +maintainers:
> + - Ansuel Smith <ansuelsmth@gmail.com>
> +
> +properties:
> + compatible:
> + const: dynamic-partitions

This is useless. This tells me nothing about the what's in the
partitions.

> +
> +patternProperties:
> + "@[0-9a-f]+$":
> + $ref: "partition.yaml#"
> +
> +additionalProperties: true
> +
> +examples:
> + - |
> + partitions {
> + compatible = "qcom,smem";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + };
> +
> + dynamic-partitions {
> + compatible = "dynamic-partitions";
> +
> + art: art {
> + label = "0:art";
> + read-only;
> + compatible = "nvmem-cells";
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + macaddr_art_0: macaddr@0 {
> + reg = <0x0 0x6>;
> + };
> +
> + macaddr_art_6: macaddr@6 {
> + reg = <0x6 0x6>;
> + };
> + };
> + };
> --
> 2.33.1
>
>

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