[PATCH v9 08/21] ARM64 / ACPI: Introduce PCI stub functions for ACPI
From: Grant Likely <hidden>
Date: 2015-03-06 20:36:50
Also in:
linux-acpi, lkml
On Wed, 25 Feb 2015 16:39:48 +0800 , Hanjun Guo [off-list ref] wrote:
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 <redacted> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Tested-by: Yijing Wang <redacted> Tested-by: Mark Langsdorf <redacted> Tested-by: Jon Masters <redacted> Tested-by: Timur Tabi <redacted> Tested-by: Robert Richter <redacted> Acked-by: Robert Richter <redacted> Signed-off-by: Hanjun Guo <redacted>
Reviewed-by: Grant Likely <redacted>
quoted hunk ↗ jump to hunk
--- arch/arm64/include/asm/pci.h | 6 ++++++ arch/arm64/kernel/pci.c | 25 +++++++++++++++++++++++++ 2 files changed, 31 insertions(+)diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h index 872ba93..fded096 100644 --- a/arch/arm64/include/asm/pci.h +++ b/arch/arm64/include/asm/pci.h@@ -24,6 +24,12 @@ */ #define PCI_DMA_BUS_IS_PHYS (0) +static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) +{ + /* no legacy IRQ on arm64 */ + return -ENODEV; +} + extern int isa_dma_bridge_buggy; #ifdef CONFIG_PCIdiff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 6f93c24..4095379 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c@@ -10,6 +10,7 @@ * */ +#include <linux/acpi.h> #include <linux/init.h> #include <linux/io.h> #include <linux/kernel.h>@@ -46,3 +47,27 @@ int pcibios_add_device(struct pci_dev *dev) 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-- 1.9.1