diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0076-ARM-pci-add-add_bus-and-remove_bus-hooks-to-hw_pci.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0076-ARM-pci-add-add_bus-and-remove_bus-hooks-to-hw_pci.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0076-ARM-pci-add-add_bus-and-remove_bus-hooks-to-hw_pci.patch b/target/linux/mvebu/patches-3.10/0076-ARM-pci-add-add_bus-and-remove_bus-hooks-to-hw_pci.patch new file mode 100644 index 0000000..adae314 --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0076-ARM-pci-add-add_bus-and-remove_bus-hooks-to-hw_pci.patch @@ -0,0 +1,80 @@ +From ea6a42a34462ea382209ff4f083b8b17260eb409 Mon Sep 17 00:00:00 2001 +From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Date: Wed, 19 Jun 2013 18:27:20 +0200 +Subject: [PATCH 076/203] ARM: pci: add ->add_bus() and ->remove_bus() hooks to + hw_pci + +Some PCI drivers may need to adjust the pci_bus structure after it has +been allocated by the Linux PCI core. The PCI core allows +architectures to implement the pcibios_add_bus() and +pcibios_remove_bus() for this purpose. This commit therefore extends +the hw_pci and pci_sys_data structures of the ARM PCI core to allow +PCI drivers to register ->add_bus() and ->remove_bus() in hw_pci, +which will get called when a bus is added or removed from the system. + +This will be used for example by the Marvell PCIe driver to connect a +particular PCI bus with its corresponding MSI chip to handle Message +Signaled Interrupts. + +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Reviewed-by: Thierry Reding <thierry.reding@gmail.com> +Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> +Tested-by: Daniel Price <daniel.price@gmail.com> +Tested-by: Thierry Reding <thierry.reding@gmail.com> +--- + arch/arm/include/asm/mach/pci.h | 4 ++++ + arch/arm/kernel/bios32.c | 16 ++++++++++++++++ + 2 files changed, 20 insertions(+) + +--- a/arch/arm/include/asm/mach/pci.h ++++ b/arch/arm/include/asm/mach/pci.h +@@ -35,6 +35,8 @@ struct hw_pci { + resource_size_t start, + resource_size_t size, + resource_size_t align); ++ void (*add_bus)(struct pci_bus *bus); ++ void (*remove_bus)(struct pci_bus *bus); + }; + + /* +@@ -62,6 +64,8 @@ struct pci_sys_data { + resource_size_t start, + resource_size_t size, + resource_size_t align); ++ void (*add_bus)(struct pci_bus *bus); ++ void (*remove_bus)(struct pci_bus *bus); + void *private_data; /* platform controller private data */ + }; + +--- a/arch/arm/kernel/bios32.c ++++ b/arch/arm/kernel/bios32.c +@@ -363,6 +363,20 @@ void pcibios_fixup_bus(struct pci_bus *b + } + EXPORT_SYMBOL(pcibios_fixup_bus); + ++void pcibios_add_bus(struct pci_bus *bus) ++{ ++ struct pci_sys_data *sys = bus->sysdata; ++ if (sys->add_bus) ++ sys->add_bus(bus); ++} ++ ++void pcibios_remove_bus(struct pci_bus *bus) ++{ ++ struct pci_sys_data *sys = bus->sysdata; ++ if (sys->remove_bus) ++ sys->remove_bus(bus); ++} ++ + /* + * Swizzle the device pin each time we cross a bridge. If a platform does + * not provide a swizzle function, we perform the standard PCI swizzling. +@@ -463,6 +477,8 @@ static void pcibios_init_hw(struct hw_pc + sys->swizzle = hw->swizzle; + sys->map_irq = hw->map_irq; + sys->align_resource = hw->align_resource; ++ sys->add_bus = hw->add_bus; ++ sys->remove_bus = hw->remove_bus; + INIT_LIST_HEAD(&sys->resources); + + if (hw->private_data) |