Hello,
On Tue, 30 Jun 2015 19:19:00 +0200, Gregory CLEMENT wrote:
> On the Armada 370/XP/38x/39x SoCs when the suspend to ram feature is
> supported, the SoC is shutdown and will be waken up by an external
waken -> woken
> micro-controller, so there is no possibility to setup wake-up source
source -> sources
> from Linux. However, in standby mode, the SoCs stay powered and it is
stay powered -> stays powered on
> possible to wake-up from any interrupt sources. As, when user decide to
> setup a wake-up source, there is no way to know if they will be
> wake-up source from suspend or from standby, then we chose allowing to
> setup all the interrupt as wake-up sources.
Hum. "Since when the users configures the enabled wake-up sources there
is no way to know if the user will be doing suspend to RAM or standby,
we just allow all wake-up sources to be enabled, and only warn when
entering suspend to RAM".
> diff --git a/arch/arm/mach-mvebu/pm.c b/arch/arm/mach-mvebu/pm.c
> index 264073a777d8..4402dcfa7c56 100644
> --- a/arch/arm/mach-mvebu/pm.c
> +++ b/arch/arm/mach-mvebu/pm.c
> @@ -235,6 +235,7 @@ static int mvebu_pm_enter(suspend_state_t state)
> cpu_do_idle();
> break;
> case PM_SUSPEND_MEM:
> + pr_warn("None of the wakeup sources will be taken into account
> in suspend to ram\n");
We already had some discussion about this, and I believe this continue
to be confusing: there are some wake-up sources taken into account when
in suspend to RAM: the special button used by the micro-controller. It
is indeed not a wake-up source in the Linux sense, but it is still a
wake-up source. With such a message, the user may believe that there is
simply no way of resuming the platform.
Maybe just:
pr_warn("Entering suspend to RAM. Only special wake-up sources will
resume the system\n");
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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