From: Rafał Miłecki rafal@milecki.pl

This is RFC and request for a help & discussion.

While reviewing patch for U-Boot env binding it has been mentioned that:

1. /Processing/ whole DT in U-Boot may be too much work Handling flash devices, partitions, their formats & NVMEM may require too many U-Boot drivers involved.

2. It'd be nice to have env data storage devices pointed in chosen

I wrote this hacky PATCH to give a rough idea how it could look like.

Please review this and let me know: 1. If solution with chosen + phandles is acceptable 2. How to properly name .yaml file 3. Where it put it

Signed-off-by: Rafał Miłecki rafal@milecki.pl --- .../devicetree/bindings/u-boot,chosen.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/u-boot,chosen.yaml

diff --git a/Documentation/devicetree/bindings/u-boot,chosen.yaml b/Documentation/devicetree/bindings/u-boot,chosen.yaml new file mode 100644 index 000000000000..8369da91193d --- /dev/null +++ b/Documentation/devicetree/bindings/u-boot,chosen.yaml @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/u-boot,chosen.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: U-Boot setup + +maintainers: + - Rafał Miłecki rafal@milecki.pl + +properties: + u-boot,env: + $ref: /schemas/types.yaml#/definitions/phandle-array + description: | + A list of storage volumes containing U-Boot environment data. + + Env data can be stored on various kinds of storage devices, e.g.: + 1. Raw flash partition + 2. UBI volume + +additionalProperties: true + +examples: + - | + chosen { + u-boot,env = <&env>; + }; + + partitions { + compatible = "fixed-partitions"; + #address-cells = <1>; + #size-cells = <1>; + + env: partition@0 { + reg = <0x0000000 0x1000>; + label = "u-boot-env"; + }; + };