openwrtv4/target/linux/mvebu/patches-3.10/0076-ARM-pci-add-add_bus-and-remove_bus-hooks-to-hw_pci.patch
Luka Perkov 3af779eb17 mvebu: backport mainline patches from kernel 3.12
This is a backport of the patches accepted to the Linux mainline related to
mvebu SoC (Armada XP and Armada 370) between Linux v3.11, and Linux v3.12.
This work mainly covers:

* Ground work for sharing the pxa nand driver(drivers/mtd/nand/pxa3xx_nand.c)
  between the PXA family,and the Armada family.
* Further updates to the mvebu MBus.
* Work and ground work for enabling MSI on the Armada family.
* some phy / mdio bus initialization related work.
* Device tree binding documentation update.

Signed-off-by: Seif Mazareeb <seif.mazareeb@gmail.com>
CC: Luka Perkov <luka@openwrt.org>

SVN-Revision: 39565
2014-02-11 02:07:41 +00:00

80 lines
2.7 KiB
Diff

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)