Re: [PATCH] PM / domains: Kconfig: always enable PM_RUNTIME when genpd enabled

[Geert Uytterhoeven]

On Mon, Nov 17, 2014 at 2:22 AM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> On Saturday, November 15, 2014 01:32:01 PM Geert Uytterhoeven wrote:
>> On Fri, Nov 14, 2014 at 6:36 PM, Kevin Hilman <khilman@xxxxxxxxxx> wrote:
>> >> On Thu, Nov 13, 2014 at 11:28 PM, Kevin Hilman <khilman@xxxxxxxxxx> wrote:
>> >>> It makes little sense to use generic power domains without runtime PM.
>> >>
>> >> Does it?
>> >> It still powers down the PM domains on system suspend (at least on my
>> >> boards ;-)
>> >
>> > Sure, but your devices are also using runtime PM, so I'm not sure how
>> > does that change my statement above?
>>
>> I do mean with CONFIG_PM_RUNTIME turned off.
>>
>> If PM domain support is disabled, s2ram will not power down the PM domains.
>
> But if PM_RUNTIME is enabled along with it, I don't think it will make much
> of a different, will it?

That's true.

> Building the kernel with genpd and without PM_RUNTIME is possible today,
> but is it really useful?  To me, it only seems to make people try to
> reinvent the wheel "because PM_RUNTIME may be unset".
>
> I have to say I'm seriously considering to make PM_SLEEP select
> PM_RUNTIME too as that would make quite a few things a *lot* simpler.

I agree that it would simplify things, a reduce testing efforts.

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/