From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liviu.Dudau@arm.com (Liviu Dudau) Date: Wed, 5 Mar 2014 11:48:52 +0000 Subject: [PATCH v6 1/6] pci: Introduce pci_register_io_range() helper function. In-Reply-To: <1394020137-1830-1-git-send-email-Liviu.Dudau@arm.com> References: <1394020137-1830-1-git-send-email-Liviu.Dudau@arm.com> Message-ID: <1394020137-1830-2-git-send-email-Liviu.Dudau@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Some architectures do not share x86 simple view of the I/O space and instead use a range of addresses that map to external devices. For PCI, these ranges can be expressed by OF bindings in a device tree file. Introduce a pci_register_io_range() helper function that can be used by the architecture code to keep track of the io ranges described by the PCI bindings. Signed-off-by: Liviu Dudau Tested-by: Tanmay Inamdar --- drivers/of/address.c | 5 +++++ include/linux/of_address.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/of/address.c b/drivers/of/address.c index 1a54f1f..d1bb30f 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -619,6 +619,11 @@ const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, } EXPORT_SYMBOL(of_get_address); +int __weak pci_register_io_range(phys_addr_t addr, resource_size_t size) +{ + return 0; +} + unsigned long __weak pci_address_to_pio(phys_addr_t address) { if (address > IO_SPACE_LIMIT) diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 5f6ed6b..40c418d 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -56,6 +56,7 @@ extern void __iomem *of_iomap(struct device_node *device, int index); extern const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, unsigned int *flags); +extern int pci_register_io_range(phys_addr_t addr, resource_size_t size); extern unsigned long pci_address_to_pio(phys_addr_t addr); extern int of_pci_range_parser_init(struct of_pci_range_parser *parser, -- 1.9.0