From: Thomas Petazzoni Date: Tue, 26 Mar 2013 17:14:24 +0000 (+0100) Subject: ARM: 7683/1: pci: add a align_resource hook X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~51^2~1^5~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=029baf14a027a44b3ac8a9fe5cb1e516cbb9007e;p=pandora-kernel.git ARM: 7683/1: pci: add a align_resource hook The PCI specifications says that an I/O region must be aligned on a 4 KB boundary, and a memory region aligned on a 1 MB boundary. However, the Marvell PCIe interfaces rely on address decoding windows (which allow to associate a range of physical addresses with a given device). For PCIe memory windows, those windows are defined with a 1 MB granularity (which matches the PCI specs), but PCIe I/O windows can only be defined with a 64 KB granularity, so they have to be 64 KB aligned. We therefore need to tell the PCI core about this special alignement requirement. The PCI core already calls pcibios_align_resource() in the ARM PCI core, specifically for such purposes. So this patch extends the ARM PCI core so that it calls a ->align_resource() hook registered by the PCI driver, exactly like the existing ->map_irq() and ->swizzle() hooks. A particular PCI driver can register a align_resource() hook, and do its own specific alignement, depending on the specific constraints of the underlying hardware. Signed-off-by: Thomas Petazzoni Signed-off-by: Russell King --- Reading git-diff-tree failed