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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-08-09 22:27:12 +0200
committerJason Cooper <jason@lakedaemon.net>2013-08-12 15:27:12 +0000
commit9d981ea5d43af79e1d7942d3d28e0f609db8b5d4 (patch)
tree1864c01f28105c6cbf49d0aabcf9e308a7c12072 /arch/arm/kernel
parent0d5a6db3aa46faafd0212650bfd709d51240d9da (diff)
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> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/bios32.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 261fcc826169..1ec9c8701c26 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -363,6 +363,20 @@ void pcibios_fixup_bus(struct pci_bus *bus)
}
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.
@@ -464,6 +478,8 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
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)