Re: [PATCH v4 2/3] soc: renesas: Add Renesas R-Car MFIS driver

[Geert Uytterhoeven]

On Thu, 2 Apr 2026 at 13:27, Wolfram Sang
<wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:
> Renesas R-Car MFIS offers multiple features but most importantly
> mailboxes and hwspinlocks. Because they share a common register space
> and a common register unprotection mechanism, a single driver was chosen
> to handle all dependencies. (MFD and auxiliary bus have been tried as
> well, but they failed because of circular dependencies.)
>
> In this first step, the driver implements common register access and a
> mailbox controller. hwspinlock support will be added incrementally, once
> the subsystem allows out-of-directory drivers.
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> Acked-by: Jassi Brar <jassisinghbrar@xxxxxxxxx>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> Changes since v3:
>
> * use more 'unsigned int' instead of 'int'
> * re-ordered declarations to be more xmas-tree like
>   (don't want to go farther than this)
> * added tags from Geert (Thanks!)

Thanks, will queue in renesas-devel for v7.2, with a few more
reverse-xmas fixes.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds