Hi Varka, This is a arm based custom platform in which we have both AMBA bus as well as pci bus (pci slots which can fit addon cards). There is no restriction(as far as I understand) that ARM based platforms cannot have PCI bus. Regards, Ayan Kumar Halder On Mon, Jun 2, 2014 at 1:28 PM, Varka Bhadram <varkab@xxxxxxx> wrote: > My first doubt is why ARM is having PCI bus... ? I think it has AMBA Bus ... > > > On June 1, 2014 at 11:40 PM AYAN KUMAR HALDER <ayankumarh@xxxxxxxxx> wrote: >> Hi, >> >> I am working with Linux hibernation framework on ARM based custom SOC >> which has SATA controller on PCI bus. >> >> I see that when the system resumes from hibernation, the SATA >> controller(drivers/ata/ahci.c) on PCI bus fails to come up. My >> understanding is that the hibernation calls 'freeze' of all devices. >> The SATA controller receives the power state event as PM_EVENT_FREEZE >> ( ie pdev->dev.power.power_state.event = PM_EVENT_FREEZE). Thus when >> system restores the hibernation image, ahci_pci_device_resume gets >> called in which ahci_pci_reset_controller/ahci_pci_init_controller >> does not get called. So SATA controller fails to come up. >> >> Please let me know if my understanding is correct or not. If so, then >> in ahci_pci_device_resume() should we change the following >> if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) >> to >> if (pdev->dev.power.power_state.event == PM_EVENT_FREEZE) >> >> In hibernation , as we power down the system, so I understand that the >> sata controller need to be reset and re-initialized for proper >> functioning. >> >> Regards, >> Ayan Kumar Halder >> > Regards, > Varka Bhadram > > > ------------------------------------------------------------------------------------------------------------------------------- > [ C-DAC is on Social-Media too. Kindly follow us at: > Facebook: https://www.facebook.com/CDACINDIA & Twitter: @cdacindia ] > > This e-mail is for the sole use of the intended recipient(s) and may > contain confidential and privileged information. If you are not the > intended recipient, please contact the sender by reply e-mail and destroy > all copies and the original message. Any unauthorized review, use, > disclosure, dissemination, forwarding, printing or copying of this email > is strictly prohibited and appropriate legal action will be taken. > ------------------------------------------------------------------------------------------------------------------------------- _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
