[PATCH v2 4/4] ARM: mvebu: Warn about the wake-up sources not taken into account in suspend

Gregory CLEMENT gregory.clement at free-electrons.com
Tue Jun 30 10:19:00 PDT 2015

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
micro-controller, so there is no possibility to setup wake-up source
from Linux. However, in standby mode, the SoCs stay powered and it is
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.

The purpose of this patch is to inform the user that in suspend to ram
mode, the wake-up sources won't be taken into consideration.

Signed-off-by: Gregory CLEMENT <gregory.clement at free-electrons.com>
 arch/arm/mach-mvebu/pm.c | 1 +
 1 file changed, 1 insertion(+)

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)
+		pr_warn("None of the wakeup sources will be taken into account in suspend to ram\n");
 		return mvebu_enter_suspend();
 		return -EINVAL;

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