PCI: Move private DT related functions into private header

The functions in linux/of_pci.h are primarily used by host bridge
drivers, so they can be private to drivers/pci/.

The remaining functions are still used mostly in host bridge drivers
that still live in arch specific code. Hopefully someday, those will get
moved into drivers/pci as well.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jingoo Han <jingoohan1@gmail.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 023f7cf25bff..6c7cd16a1d1c 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -407,4 +407,44 @@ static inline u64 pci_rebar_size_to_bytes(int size)
 	return 1ULL << (size + 20);
 }
 
+struct device_node;
+
+#ifdef CONFIG_OF
+int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
+int of_get_pci_domain_nr(struct device_node *node);
+int of_pci_get_max_link_speed(struct device_node *node);
+
+#else
+static inline int
+of_pci_parse_bus_range(struct device_node *node, struct resource *res)
+{
+	return -EINVAL;
+}
+
+static inline int
+of_get_pci_domain_nr(struct device_node *node)
+{
+	return -1;
+}
+
+static inline int
+of_pci_get_max_link_speed(struct device_node *node)
+{
+	return -EINVAL;
+}
+#endif /* CONFIG_OF */
+
+#if defined(CONFIG_OF_ADDRESS)
+int of_pci_get_host_bridge_resources(struct device_node *dev,
+			unsigned char busno, unsigned char bus_max,
+			struct list_head *resources, resource_size_t *io_base);
+#else
+static inline int of_pci_get_host_bridge_resources(struct device_node *dev,
+			unsigned char busno, unsigned char bus_max,
+			struct list_head *resources, resource_size_t *io_base)
+{
+	return -EINVAL;
+}
+#endif
+
 #endif /* DRIVERS_PCI_H */