From: Rafał Miłecki <rafal@xxxxxxxxxx> Some NVMEM cells may provide more than 1 value. An example can be base MAC address that is used for calculating multiple MACs (for few different devices). For specifying value to read phandle needs to be used with an argument. Cc: Srinivas Kandagatla" <srinivas.kandagatla@xxxxxxxxxx> Cc: Michael Walle <michael@xxxxxxxx> Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx> --- This bit is required for moving forward with the [PATCH v2 00/20] nvmem: core: introduce NVMEM layouts https://lore.kernel.org/linux-arm-kernel/20220901221857.2600340-1-michael@xxxxxxxx/ As pointed out by Rob #nvmem-cell-cells should be added to the dt-schema and not a Linux binding: Re: [PATCH v2 15/20] dt-bindings: nvmem: add YAML schema for the sl28 vpd layout https://lore.kernel.org/linux-arm-kernel/20220912192038.GA1661550-robh@xxxxxxxxxx/ sl28 is one example that needs #nvmem-cell-cells u-boot,env is another one Please let me know if I got this binding right at all. --- dtschema/schemas/nvmem/nvmem-cell.yaml | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 dtschema/schemas/nvmem/nvmem-cell.yaml diff --git a/dtschema/schemas/nvmem/nvmem-cell.yaml b/dtschema/schemas/nvmem/nvmem-cell.yaml new file mode 100644 index 0000000..dfa99b8 --- /dev/null +++ b/dtschema/schemas/nvmem/nvmem-cell.yaml @@ -0,0 +1,23 @@ +# SPDX-License-Identifier: BSD-2-Clause +$id: "http://devicetree.org/schemas/nvmem/nvmem-cell.yaml#"; +$schema: "http://devicetree.org/meta-schemas/base.yaml#"; + +title: NVMEM Cell Common Properties +description: "Schema for NVMEM cell devicetree bindings" +maintainers: + - Rafał Miłecki <rafal@xxxxxxxxxx> + - Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> + +# always select the core schema +select: true + +properties: + "#nvmem-cell-cells": + $ref: "/schemas/types.yaml#/definitions/uint32" + description: > + Some NVMEM cells may consist of raw data that requires some extra + processing. They may provide more than 1 value. + + Passing extra argument(s) allows selecting data to access. + +additionalProperties: true -- 2.34.1
