Messages in this thread | | | Date | Sat, 25 Jul 2015 17:20:07 +0200 | From | Gregory CLEMENT <> | Subject | Re: [PATCH v2 0/4] Add standby support for the recent mvebu SoCs |
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Hi,
On 30/06/2015 19:18, Gregory CLEMENT wrote: > Hi, > > Until now only few mvebu v7 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 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 > > This series was applied on top of Thomas' series "ARM: mvebu: add > suspend to RAM support for Armada 38x": > http://thread.gmane.org/gmane.linux.ports.arm.kernel/420458 > > It has been either using rtcwake or by setting the serial line as a > wake-up source through the sysfs interface.
I applied the series on mvebu/soc
Thanks,
Gregory
> > Thanks, > > Gregory > > > Gregory CLEMENT (4): > 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 > ARM: mvebu: Warn about the wake-up 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 | 19 +++++++++----- > arch/arm/mach-mvebu/pm.c | 58 +++++++++++++++++++++++++++++++++++++----- > 4 files changed, 73 insertions(+), 16 deletions(-) >
-- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com
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