On Mon, Mar 19, 2018 at 11:48 AM, John Garry <john.garry@xxxxxxxxxx> wrote: > On 19/03/2018 10:30, Rafael J. Wysocki wrote: >> >> On Wednesday, March 14, 2018 7:15:57 PM CET John Garry wrote: >>> >>> > Through the logical PIO framework systems which otherwise have >>> > no IO space access to legacy ISA/LPC devices may access these >>> > devices through so-called "indirect IO" method. In this, IO >>> > space accesses for non-PCI hosts are redirected to a host >>> > LLDD to manually generate the IO space (bus) accesses. Hosts >>> > are able to register a region in logical PIO space to map to >>> > its bus address range. >>> > >>> > Indirect IO child devices have an associated host-specific bus >>> > address. Special translation is required to map between >>> > a logical PIO address for a device and it's host bus address. >>> > >>> > Since in the ACPI tables the child device IO resources would >>> > be the host-specific values, it is required the ACPI scan code >>> > should not enumerate these devices, and that this should be >>> > the responsibility of the host driver so that it can "fixup" >>> > the resources so that they map to the appropriate logical PIO >>> > addresses. >>> > >>> > To avoid enumerating these child devices, we add a check from >>> > acpi_device_enumeration_by_parent() as to whether the parent >>> > for a device is a member of a known list of "indirect IO" hosts. >>> > For now, the HiSilicon LPC host controller ID is added. >>> > >>> > Signed-off-by: John Garry <john.garry@xxxxxxxxxx> >>> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> >> >> You have my ACK here already. >> >> Since I've ACKed the [7/10] too, I don't think there's anything more I can >> do >> about this series and I'm assuming that it will be routed through other >> trees. >> >> Thanks! >> > > Hi Rafael, > > Thanks for this. > > Yes, I am working on getting this whole series routed through another tree. > Actually I think 7+8 could go separately since there is no build dependency, > but I will try to keep the series together. I can take the [7-8/10] if you want me to, so please let me know. Thanks! -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
