Re: [PATCH 1/2] mfd: syscon: add of_syscon_register_regmap() API

[Arnd Bergmann]

On Fri, Jun 14, 2024, at 16:04, Peter Griffin wrote:
> The of_syscon_register_regmap() API allows an externally created regmap
> to be registered with syscon. This regmap can then be returned to client
> drivers using the syscon_regmap_lookup_by_phandle() APIs.
>
> The API is used by platforms where mmio access to the syscon registers is
> not possible, and a underlying soc driver like exynos-pmu provides a SoC
> specific regmap that can issue a SMC or hypervisor call to write the
> register.
>
> This approach keeps the SoC complexities out of syscon, but allows common
> drivers such as  syscon-poweroff, syscon-reboot and friends that are used
> by many SoCs already to be re-used.
>
> Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>

Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>