ARM: mvebu: Warn about the wake-up sources not taken into account in suspend

On the Armada 370/XP/38x/39x SoCs when the suspend to ram feature is
supported, the SoCs are shutdown and will be woken up by an external
micro-controller, so there is no possibility to setup wake-up sources
from Linux. However, in standby mode, the SoCs stay powered and it is
possible to wake-up from any interrupt sources. 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

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@free-electrons.com>

diff --git a/arch/arm/mach-mvebu/pm.c b/arch/arm/mach-mvebu/pm.c
index b058307088f327b0441dba34222f109365199a03..8d32bf762b86cbeeda5400525f2b90732ce22f27 100644 (file)
--- a/arch/arm/mach-mvebu/pm.c
+++ b/arch/arm/mach-mvebu/pm.c
@@ -192,6 +192,7 @@ static int mvebu_pm_enter(suspend_state_t state)
                cpu_do_idle();
                break;
        case PM_SUSPEND_MEM:
+               pr_warn("Entering suspend to RAM. Only special wake-up sources will resume the system\n");
                return mvebu_enter_suspend();
        default:
                return -EINVAL;