On Wed, 2014-10-01 at 15:27 +0200, Alexander Graf wrote: > 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.
Are there any plans to handle restart similarly? -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
