[RFC PATCH v2 19/20] nvmem: layouts: rewrite the u-boot-env driver as a NVMEM layout

[Miquel Raynal]

Hi Michael,

michael at walle.cc wrote on Fri,  2 Sep 2022 00:18:56 +0200:

> 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.
> 
> Signed-off-by: Michael Walle <michael at walle.cc>
> ---
> changes since v1:
>  - none
> 
>  drivers/nvmem/layouts/Kconfig      |   8 ++
>  drivers/nvmem/layouts/Makefile     |   1 +
>  drivers/nvmem/layouts/u-boot-env.c | 144 +++++++++++++++++++
>  drivers/nvmem/u-boot-env.c         | 218 -----------------------------

Nit: IIRC there is a MAINTAINERS entry to update as well.

Thanks,
Miquèl