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authorAlexander Graf <agraf@suse.de>2014-10-13 16:01:09 +0200
committerMichael Ellerman <mpe@ellerman.id.au>2014-11-03 12:12:51 +1100
commit9178ba294b6839eeff1a91bed95515d783f3ee6c (patch)
tree61252a8808bba5208c7b7c0f0af31301278272de /arch/powerpc/sysdev
parent0df1f2487d2f0d04703f142813d53615d62a1da4 (diff)
downloadop-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/sysdev')
-rw-r--r--arch/powerpc/sysdev/fsl_soc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index ffd1169..1e04568 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -238,7 +238,7 @@ void fsl_hv_restart(char *cmd)
/*
* Halt the current partition
*
- * This function should be assigned to the ppc_md.power_off and ppc_md.halt
+ * This function should be assigned to the pm_power_off and ppc_md.halt
* function pointers, to shut down the partition when we're running under
* the Freescale hypervisor.
*/
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