mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
9178ba294b
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> |
||
|---|---|---|
| .. | ||
| device-init.c | ||
| exports.c | ||
| gelic_udbg.c | ||
| htab.c | ||
| hvcall.S | ||
| interrupt.c | ||
| Kconfig | ||
| Makefile | ||
| mm.c | ||
| os-area.c | ||
| platform.h | ||
| repository.c | ||
| setup.c | ||
| smp.c | ||
| spu.c | ||
| system-bus.c | ||
| time.c | ||