[+cc Rafael, linux-pm] On Wed, Jun 25, 2014 at 11:04 PM, AYAN KUMAR HALDER <ayankumarh@xxxxxxxxx> wrote: > Hi, > > I am using a ARM based custom SOC which has a power management unit to > turn off/on the various power domains. When I execute a suspend > command(echo mem > /sys/power/state), then I turn off the power of the > entire SOC except my PMU( as they are in different power domains). > When ever the PMU receives a certain wake-up interrupt, it powers up > the CPU and SOC and the CPU resumes the kernel as per the Linux power > management framework. > > Now I have a PCI controller which has been configured in > "linux/arch/arm/<mach-mysoc>/pcie.c". During suspend as the PCI > power(which is part of the SOC power domain) gets turned off, so the > controller loses its register configurations. On resume, the pci > driver's resume functions get called and the system hangs up(when it > tries to read/write to pci configuration space). > > As per my understanding, the pci driver has implementation of bus/ > device power management. It does not reconfigure the pci controller. > So how should I make the pci controller work fine on system resume. > Is it so that I need to reconfigure the pcie controller's registers > (as it has been done in "linux/arch/arm/<mach-mysoc>/pcie.c") from the > resume function of pci driver. Or would that compromise the entire > linux pm framework. > > Regards, > Ayan Kumar Halder > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
