Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752116AbaB1NI7 (ORCPT ); Fri, 28 Feb 2014 08:08:59 -0500 Received: from fw-tnat.cambridge.arm.com ([217.140.96.21]:53554 "EHLO cam-smtp0.cambridge.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751378AbaB1NI4 (ORCPT ); Fri, 28 Feb 2014 08:08:56 -0500 From: Liviu Dudau To: linux-pci , Bjorn Helgaas , Catalin Marinas , Will Deacon , linaro-kernel Cc: Benjamin Herrenschmidt , LKML , "devicetree@vger.kernel.org" , LAKML Subject: [PATCH v3 1/5] pci: Introduce pci_register_io_range() helper function. Date: Fri, 28 Feb 2014 13:08:18 +0000 Message-Id: <1393592902-24750-2-git-send-email-Liviu.Dudau@arm.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1393592902-24750-1-git-send-email-Liviu.Dudau@arm.com> References: <1393592902-24750-1-git-send-email-Liviu.Dudau@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/