a9cb97fe71
CONFIG_ACPI depends CONFIG_PCI on x86 and ia64, in ARM64 server world we will have PCIe in most cases, but some of them may not, make CONFIG_ACPI depend CONFIG_PCI on ARM64 will satisfy both. With that case, we need some arch dependent PCI functions to access the config space before the PCI root bridge is created, and pci_acpi_scan_root() to create the PCI root bus. So introduce some stub function here to make ACPI core compile and revisit them later when implemented on ARM64. CC: Liviu Dudau <Liviu.Dudau@arm.com> CC: Catalin Marinas <catalin.marinas@arm.com> CC: Will Deacon <will.deacon@arm.com> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Tested-by: Yijing Wang <wangyijing@huawei.com> Tested-by: Mark Langsdorf <mlangsdo@redhat.com> Tested-by: Jon Masters <jcm@redhat.com> Tested-by: Timur Tabi <timur@codeaurora.org> Tested-by: Robert Richter <rrichter@cavium.com> Acked-by: Robert Richter <rrichter@cavium.com> Reviewed-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
|
|
* Code borrowed from powerpc/kernel/pci-common.c
|
|
*
|
|
* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
|
|
* Copyright (C) 2014 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/of_pci.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/pci-bridge.h>
|
|
|
|
/*
|
|
* Called after each bus is probed, but before its children are examined
|
|
*/
|
|
void pcibios_fixup_bus(struct pci_bus *bus)
|
|
{
|
|
/* nothing to do, expected to be removed in the future */
|
|
}
|
|
|
|
/*
|
|
* We don't have to worry about legacy ISA devices, so nothing to do here
|
|
*/
|
|
resource_size_t pcibios_align_resource(void *data, const struct resource *res,
|
|
resource_size_t size, resource_size_t align)
|
|
{
|
|
return res->start;
|
|
}
|
|
|
|
/*
|
|
* Try to assign the IRQ number from DT when adding a new device
|
|
*/
|
|
int pcibios_add_device(struct pci_dev *dev)
|
|
{
|
|
dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* raw_pci_read/write - Platform-specific PCI config space access.
|
|
*/
|
|
int raw_pci_read(unsigned int domain, unsigned int bus,
|
|
unsigned int devfn, int reg, int len, u32 *val)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
|
|
int raw_pci_write(unsigned int domain, unsigned int bus,
|
|
unsigned int devfn, int reg, int len, u32 val)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
/* Root bridge scanning */
|
|
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
|
{
|
|
/* TODO: Should be revisited when implementing PCI on ACPI */
|
|
return NULL;
|
|
}
|
|
#endif
|