d776fdb776
This new helper function could be used by host drivers to
get the limitaion of max link speed provided by dt. If the
property isn't assigned or is invalid, it will return -EINVAL
to the caller.
Change-Id: I430b05fa5fd25fe17cf1bd8b1226e460eb7dd14b
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
(am from git.kernel.org/cgit/linux/kernel/git/next/linux-next.git
commit 9a1dc38912)
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
#ifndef __OF_PCI_H
|
|
#define __OF_PCI_H
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/msi.h>
|
|
|
|
struct pci_dev;
|
|
struct of_phandle_args;
|
|
struct device_node;
|
|
|
|
#ifdef CONFIG_OF
|
|
int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq);
|
|
struct device_node *of_pci_find_child_device(struct device_node *parent,
|
|
unsigned int devfn);
|
|
int of_pci_get_devfn(struct device_node *np);
|
|
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin);
|
|
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);
|
|
void of_pci_check_probe_only(void);
|
|
#else
|
|
static inline int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct device_node *of_pci_find_child_device(struct device_node *parent,
|
|
unsigned int devfn)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int of_pci_get_devfn(struct device_node *np)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int
|
|
of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static inline void of_pci_check_probe_only(void) { }
|
|
#endif
|
|
|
|
#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);
|
|
#endif
|
|
|
|
#if defined(CONFIG_OF) && defined(CONFIG_PCI_MSI)
|
|
int of_pci_msi_chip_add(struct msi_controller *chip);
|
|
void of_pci_msi_chip_remove(struct msi_controller *chip);
|
|
struct msi_controller *of_pci_find_msi_chip_by_node(struct device_node *of_node);
|
|
#else
|
|
static inline int of_pci_msi_chip_add(struct msi_controller *chip) { return -EINVAL; }
|
|
static inline void of_pci_msi_chip_remove(struct msi_controller *chip) { }
|
|
static inline struct msi_controller *
|
|
of_pci_find_msi_chip_by_node(struct device_node *of_node) { return NULL; }
|
|
#endif
|
|
|
|
#endif
|