[PATCH v2 12/14] drivers: sh: Stop using pm_runtime.c for multi-platform shmobile with genpd

Geert Uytterhoeven geert at linux-m68k.org
Mon Jun 15 12:44:47 PDT 2015

On Thu, May 28, 2015 at 8:53 PM, Geert Uytterhoeven
<geert+renesas at glider.be> wrote:
> Now most multi-platform ARM shmobile platforms (SH-Mobile, R-Mobile,
> R-Car, RZ) use the CPG Clock Domain to take care of PM runtime
> management of the module clocks, we no longer need the legacy default PM
> domain hack, which also prevented registering the real PM domain.
> EMMA Mobile EV2 doesn't have MSTP clocks and doesn't use the CPG Clock
> Domain. But all its device drivers manage clocks explicitly, without
> relying on Runtime PM, so it doesn't need the legacy default PM hack
> neither.
> Hence do not compile it when running an ARM multi-platform kernel with
> genpd support.
> The default PM domain is still needed:
>   - for legacy SuperH,
>   - for legacy (non-DT) ARM/shmobile platforms
>       - without genpd support (r8a7778, r8a7779),
>       - with genpd support, for devices in the "C5" always-on power
>         area (r8a7740, sh73a0),
>   - for the CONFIG_PM=n case.
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> Reviewed-by: Ulf Hansson <ulf.hansson at linaro.org>
> ---
> v2:
>   - Add Reviewed-by,
>   - Just stop compiling pm_runtime.c instead of using a runtime check,
>     as no multi-platform ARM platforms need this anymore.

The runtime check must stay for the ARM multiplatform CONFIG_PM=n case,
to prevent the code from running on non-shmobile machines. Will fix.



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

More information about the linux-arm-kernel mailing list