On Tue, 1 Mar 2011, Pierre Tardy wrote: > On Tue, Mar 1, 2011 at 8:33 PM, Alan Stern <st...@rowland.harvard.edu> wrote: > > On Tue, 1 Mar 2011, Pierre Tardy wrote: > > > >> Please find sdhci runtime_pm implementation. > >> > >> It uses clock gating fw as a tip to know when our chip is idle. > >> It implements wake up from card insertion/removal. > >> > >> This is RFC, please dont merge yet. I really would like to have deep review > >> from PCI linux-pm guys. > >> > >> Opens are: > >> > >> 1/ Not sure if the pci configs in the driver in rpm_suspend/resume flow > >> are not duplicate from what the core is doing. > > > > There may be one or two small errors. > > > >> 2/ Wakeup from D3hot: I cannot find any driver that is implementing it in > >> current upstream, > > > > Other drivers do it, but they use PCI PME# instead of interrupts. > Could you please elaborate? > My understanding is that PCI PME will generate MSI, which translate in > interrupt.
It depends on the platform. On systems with ACPI, PCI PME generates an ACPI I/O event, which is handled by the ACPI and PM cores. It does not invoke the device driver's interrupt handler. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
