x86: dtb: Add support for PCI devices backed by dtb nodes
x86_of_pci_init() does two things:
- it provides a generic irq enable and disable function. enable queries
the device tree for the interrupt information, calls ->xlate on the
irq host and updates the pci->irq information for the device.
- it walks through PCI bus(es) in the device tree and adds its children
(device) nodes to appropriate pci_dev nodes in kernel. So the dtb
node information is available at probe time of the PCI device.
Adding a PCI bus based on the information in the device tree is
currently not supported. Right now direct access via ioports is used.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-8-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h
index 35ec32b..8fcd519 100644
--- a/arch/x86/include/asm/prom.h
+++ b/arch/x86/include/asm/prom.h
@@ -16,6 +16,7 @@
#include <linux/of.h>
#include <linux/types.h>
+#include <linux/pci.h>
#include <asm/irq.h>
#include <asm/atomic.h>
@@ -29,8 +30,21 @@
void x86_dtb_find_config(void);
void x86_dtb_get_config(unsigned int unused);
void add_interrupt_host(struct irq_domain *ih);
+void __cpuinit x86_of_pci_init(void);
+
+static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
+{
+ return pdev ? pdev->dev.of_node : NULL;
+}
+
+static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
+{
+ return pci_device_to_OF_node(bus->self);
+}
+
#else
static inline void add_dtb(u64 data) { }
+static inline void x86_of_pci_init(void) { }
#define x86_dtb_find_config x86_init_noop
#define x86_dtb_get_config x86_init_uint_noop
#define of_ioapic 0