[PATCH V2 21/23] pci, acpi: Support for ACPI based PCI hostbridge init

[Arnd Bergmann]

On Wednesday 16 December 2015 16:16:31 Tomasz Nowicki wrote:
> Because of two patch series:
> 1. Jiang Liu's common interface to support PCI host bridge init
> 2. MMCONFIG refactoring (part of this patch set)
> now we can think about generic ACPI based PCI host bridge driver
> out of arch/ directory.
> 
> This driver use information from MCFG table (PCI config space regions)
> and _CRS method (IO/irq resources) to initialize PCI hostbridge.
> 
> TBD: We are still not sure whether we should reassign resources
> after PCI bus enumeration or trust firmware to do all that work for
> us properly.
> 
> Signed-off-by: Tomasz Nowicki <tn at semihalf.com>
> Signed-off-by: Hanjun Guo <hanjun.guo at linaro.org>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit at amd.com>
> CC: Arnd Bergmann <arnd at arndb.de>
> CC: Catalin Marinas <catalin.marinas at arm.com>
> CC: Liviu Dudau <Liviu.Dudau at arm.com>
> CC: Lorenzo Pieralisi <Lorenzo.Pieralisi at arm.com>
> CC: Will Deacon <will.deacon at arm.com>
> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit at amd.com>
> 

I think this code could better live in drivers/acpi/pci_root.c
along with all the related functions. It's not really a driver
by itself and cannot be a loadable module or built on other
architectures.

You can put all the code inside an #ifdef ARCH_PCI_HOST_GENERIC_ACPI
there.

	Arnd