[PATCH/RFC v2 05/11] soc: renesas: rcar: Handle clock domain devices in SYSC PM domains

[Geert Uytterhoeven]

Hi Laurent,

On Mon, Feb 15, 2016 at 11:08 PM, Laurent Pinchart
<laurent.pinchart at ideasonboard.com> wrote:
> On Monday 15 February 2016 22:16:54 Geert Uytterhoeven wrote:
>> R-Car H3 contains some hardware modules (e.g. VSP and FCP_V) that are
>> not only located in a power area controlled by the SYSC system
>> controller, but that are also part of the generic CPG/MSSR clock domain.
>> Make sure both are handled by enabling module clock PM when the device
>> for such a hardware module is attached to the SYSC PM Domain.
>
> Can't we specify both power domains in the DT power-domains attribute instead
> ?

While the DT property is called "power-domains" (plural), only the first entry
is parsed by genpd_dev_pm_attach(). Which makes sense for power areas
(if there are multiple, they are nested), but indeed can cause problems when
mixed with clock domains.

For R-Mobile, I fixed it in a similar way.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

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