Re: [PATCH 0/5] Add standby support for the recent mvebu SoCs
From: Marcin Wojtas
Date: Wed Apr 01 2015 - 05:39:28 EST
Thanks, it heleped.
2015-04-01 11:21 GMT+02:00 Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>:
> Hi Marcin,
> On 01/04/2015 11:02, Marcin Wojtas wrote:
>> Hi Gregory,
>> When I run standby on A385 I get following error:
>> root@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?
> Yes the mbus driver for the Armada 38x must be updated. As Thomas
> worked on it I didn't put it in the series.
> I have just create the patch needed you can try it, and I will
> add it in the next version of the series.
>> Best regards,
>> 2015-03-30 16:04 GMT+02:00 Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>:
>>> 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
>>> 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.
>>> 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
>>> 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(-)
>>> linux-arm-kernel mailing list
> Gregory Clement, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
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