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linux-next/arch/powerpc/platforms/chrp
Alexander Graf 9178ba294b powerpc: Convert power off logic to pm_power_off
The generic Linux framework to power off the machine is a function pointer
called pm_power_off. The trick about this pointer is that device drivers can
potentially implement it rather than board files.

Today on powerpc we set pm_power_off to invoke our generic full machine power
off logic which then calls ppc_md.power_off to invoke machine specific power
off.

However, when we want to add a power off GPIO via the "gpio-poweroff" driver,
this card house falls apart. That driver only registers itself if pm_power_off
is NULL to ensure it doesn't override board specific logic. However, since we
always set pm_power_off to the generic power off logic (which will just not
power off the machine if no ppc_md.power_off call is implemented), we can't
implement power off via the generic GPIO power off driver.

To fix this up, let's get rid of the ppc_md.power_off logic and just always use
pm_power_off as was intended. Then individual drivers such as the GPIO power off
driver can implement power off logic via that function pointer.

With this patch set applied and a few patches on top of QEMU that implement a
power off GPIO on the virt e500 machine, I can successfully turn off my virtual
machine after halt.

Signed-off-by: Alexander Graf <agraf@suse.de>
[mpe: Squash into one patch and update changelog based on cover letter]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-11-03 12:12:51 +11:00
..
chrp.h [POWERPC] Make pci_read_irq_line the default 2006-12-04 16:00:04 +11:00
gg2.h [POWERPC] Copy over headers from arch/ppc to arch/powerpc that we need 2007-08-22 22:43:29 -05:00
Kconfig pcspkr: Cleanup Kconfig dependencies 2011-06-09 15:01:41 +02:00
Makefile [POWERPC] disallow building powermac and tsi108 without PCI 2007-06-29 01:57:00 -05:00
nvram.c powerpc/nvram: Fix endian issue when reading the NVRAM size 2013-10-31 12:37:27 +11:00
pci.c POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
pegasos_eth.c mv643xx_eth: convert to use the Marvell Orion MDIO driver 2013-03-22 10:25:15 -04:00
setup.c powerpc: Convert power off logic to pm_power_off 2014-11-03 12:12:51 +11:00
smp.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
time.c powerpc/nvram: Move things out of asm/nvram.h 2010-11-30 15:09:19 +11:00