[RFC PATCH v1 12/14] nvmem: layouts: rewrite the u-boot-env driver as a NVMEM layout

[Rafał Miłecki]

On 25.08.2022 23:44, Michael Walle wrote:
> Instead of hardcoding the underlying access method mtd_read() and
> duplicating all the error handling, rewrite the driver as a nvmem
> layout which just uses nvmem_device_read() and thus works with any
> NVMEM device.
> 
> But because this is now not a device anymore, the compatible string
> will have to be changed so the device will still be probed:
>    compatible = "u-boot,env";
> to
>    compatible = "u-boot,env", "nvmem-cells";
> 
> "nvmem-cells" will tell the mtd layer to register a nvmem_device().
> "u-boot,env" will tell the NVMEM that it should apply the u-boot
> environment layout to the NVMEM device.

That's fishy but maybe we can ignore backward compatibility at
point.

Still you need to update DT binding.