[PATCH 0/5] Add standby support for the recent mvebu SoCs

Marcin Wojtas
2015-04-01T09:02:47Z

Hi Gregory,

When I run standby on A385 I get following error:
root at localhost:~# echo standby > /sys/power/state
[ 122.889266] PM: System core suspend callback
mvebu_mbus_suspend+0x0/0xf4 failed.

Did you see this issue in your setup?

Best regards,
Marcin

2015-03-30 16:04 GMT+02:00 Gregory CLEMENT <gregory.clement@free-electrons.com>:
> Hi,
>
> Until now only one Armada XP based board supported suspend to
> ram. This suspend to ram mode was unusual because it involved shutting
> down the SoC and relied on a PIC to wake up the system.
>
> However, most of the recent mvebu SoCs can support the standby
> mode. Unlike for the suspend to ram, nothing special have to be done
> for these SoCs. In this mode the SoCs go in idle mode (but they remain
> powered up) and the devices enter in suspend mode. The support itself
> was added in the patch 2.
>
> In order to wake-up the interrupt controller driver have been
> updated. As in standby mode the interrupt controller is not shutdown,
> any interrupt can be a wake-up source. So the MPIC (patch 4) and the
> GIC (patch 3) now used the flags IRQCHIP_SKIP_SET_WAKE and
> IRQCHIP_MASK_ON_SUSPEND.
>
> A wake up source is supposed to work in suspend _and_ in standby mode
> but for the mvebu SoCs, no interrupt can wake up the system. The last
> patch warns the user about it.
>
> The first patch is a clean-up found while working on this series
>
> All the patch are independents either for building or for running.
>
> Thanks,
>
> Gregory
>
>
> Gregory CLEMENT (5):
> ARM: mvebu: Use __init for the PM initialization functions
> ARM: mvebu: Add standby support
> ARM: mvebu: Allow using the GIC for wakeup in standby mode
> irqchip: armada-370-xp: Allow using wakeup source
> ARM: mvebu: Warn about the wake-ups sources not taken into account in
> suspend
>
> arch/arm/mach-mvebu/board-v7.c | 7 +++++
> arch/arm/mach-mvebu/common.h | 5 ++--
> arch/arm/mach-mvebu/pm-board.c | 15 ++++++----
> arch/arm/mach-mvebu/pm.c | 57 ++++++++++++++++++++++++++++++++-----
> drivers/irqchip/irq-armada-370-xp.c | 1 +
> 5 files changed, 70 insertions(+), 15 deletions(-)
>
> --
> 2.1.0
>
>
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