[PATCH 5/9] soc: apple: Add RTKit IPC library

[Krzysztof Kozlowski]

On 21/03/2022 17:50, Sven Peter wrote:
> Apple SoCs such as the M1 come with multiple embedded co-processors
> running proprietary firmware. Communication with those is established
> over a simple mailbox using the RTKit IPC protocol.
> 
> Signed-off-by: Sven Peter <sven at svenpeter.dev>
> ---
>  drivers/soc/apple/Kconfig          |  13 +
>  drivers/soc/apple/Makefile         |   3 +
>  drivers/soc/apple/rtkit-crashlog.c | 147 +++++
>  drivers/soc/apple/rtkit-internal.h |  76 +++
>  drivers/soc/apple/rtkit.c          | 842 +++++++++++++++++++++++++++++
>  include/linux/soc/apple/rtkit.h    | 203 +++++++
>  6 files changed, 1284 insertions(+)

Isn't this some implementation of a mailbox? If so, it should be in
drivers/mailbox. Please don't put all stuff in soc/apple, that's not how
Linux is organized. To drivers/soc usually we put drivers which do not
fit regular subsystems.

Best regards,
Krzysztof