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| author | Alexander Graf <agraf@suse.de> | 2014-10-13 16:01:09 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-11-03 12:12:51 +1100 |
| commit | 9178ba294b6839eeff1a91bed95515d783f3ee6c (patch) | |
| tree | 61252a8808bba5208c7b7c0f0af31301278272de /arch/powerpc/platforms/powermac | |
| parent | 0df1f2487d2f0d04703f142813d53615d62a1da4 (diff) | |
| download | op-kernel-dev-9178ba294b6839eeff1a91bed95515d783f3ee6c.zip op-kernel-dev-9178ba294b6839eeff1a91bed95515d783f3ee6c.tar.gz | |
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>
Diffstat (limited to 'arch/powerpc/platforms/powermac')
| -rw-r--r-- | arch/powerpc/platforms/powermac/setup.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index b127a29..713d36d 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -632,6 +632,8 @@ static int __init pmac_probe(void) smu_cmdbuf_abs = memblock_alloc_base(4096, 4096, 0x80000000UL); #endif /* CONFIG_PMAC_SMU */ + pm_power_off = pmac_power_off; + return 1; } @@ -663,7 +665,6 @@ define_machine(powermac) { .get_irq = NULL, /* changed later */ .pci_irq_fixup = pmac_pci_irq_fixup, .restart = pmac_restart, - .power_off = pmac_power_off, .halt = pmac_halt, .time_init = pmac_time_init, .get_boot_time = pmac_get_boot_time, |
