[POWERPC] Add "parent" struct device for PCI host bridges

Add a "parent" struct device to our PCI host bridge data structure so that
PCI can be rooted off another device in sysfs.

Note that arch/ppc doesn't use it, only arch/powerpc, though it's available
for both 32 and 64 bits.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index d32cd50..0ad101a 100644 (file)
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -1269,7 +1269,10 @@ pcibios_init(void)
                if (pci_assign_all_buses)
                        hose->first_busno = next_busno;
                hose->last_busno = 0xff;
-               bus = pci_scan_bus(hose->first_busno, hose->ops, hose);
+               bus = pci_scan_bus_parented(hose->parent, hose->first_busno,
+                                           hose->ops, hose);
+               if (bus)
+                       pci_bus_add_devices(bus);
                hose->last_busno = bus->subordinate;
                if (pci_assign_all_buses || next_busno <= hose->last_busno)
                        next_busno = hose->last_busno + pcibios_assign_bus_offset;

diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 5ffab87..74e580d 100644 (file)
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -513,7 +513,7 @@ void __devinit scan_phb(struct pci_controller *hose)
 
        DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
 
-       bus = pci_create_bus(NULL, hose->first_busno, hose->ops, node);
+       bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node);
        if (bus == NULL) {
                printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
                       hose->global_number);

diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
index 86ee46b..7bb7f90 100644 (file)
--- a/include/asm-powerpc/pci-bridge.h
+++ b/include/asm-powerpc/pci-bridge.h
@@ -25,6 +25,7 @@ struct pci_controller {
        int node;
        void *arch_data;
        struct list_head list_node;
+       struct device *parent;
 
        int first_busno;
        int last_busno;

diff --git a/include/asm-ppc/pci-bridge.h b/include/asm-ppc/pci-bridge.h
index 9d52306..6c955d0 100644 (file)
--- a/include/asm-ppc/pci-bridge.h
+++ b/include/asm-ppc/pci-bridge.h
@@ -43,6 +43,7 @@ struct pci_controller {
        struct pci_controller *next;
         struct pci_bus *bus;
        void *arch_data;
+       struct device *parent;
 
        int first_busno;
        int last_busno;