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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2011-02-22 23:07:42 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-24 00:27:53 +0300 |
| commit | 96e0a0797eba35b5420c710b928f19094b2d5c45 (patch) | |
| tree | 4a9073fc9415b024437a5d8b56791632a14153cf /arch/x86/include/asm/prom.h | |
| parent | ffb9fc68dff38f811eeb24c15aba0418b6a8ee53 (diff) | |
| download | linux-96e0a0797eba35b5420c710b928f19094b2d5c45.tar.xz | |
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>
Diffstat (limited to 'arch/x86/include/asm/prom.h')
| -rw-r--r-- | arch/x86/include/asm/prom.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h index 35ec32b47500..8fcd519a44dc 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 @@ extern void add_dtb(u64 data); 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 |