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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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9a1dc38912
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. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rob Herring <robh@kernel.org>
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
#ifndef __OF_PCI_H
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#define __OF_PCI_H
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#include <linux/pci.h>
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#include <linux/msi.h>
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struct pci_dev;
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struct of_phandle_args;
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struct device_node;
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#ifdef CONFIG_OF_PCI
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int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq);
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struct device_node *of_pci_find_child_device(struct device_node *parent,
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unsigned int devfn);
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int of_pci_get_devfn(struct device_node *np);
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int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin);
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int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
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int of_get_pci_domain_nr(struct device_node *node);
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int of_pci_get_max_link_speed(struct device_node *node);
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void of_pci_check_probe_only(void);
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int of_pci_map_rid(struct device_node *np, u32 rid,
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const char *map_name, const char *map_mask_name,
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struct device_node **target, u32 *id_out);
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#else
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static inline int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
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{
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return 0;
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}
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static inline struct device_node *of_pci_find_child_device(struct device_node *parent,
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unsigned int devfn)
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{
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return NULL;
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}
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static inline int of_pci_get_devfn(struct device_node *np)
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{
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return -EINVAL;
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}
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static inline int
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of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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return 0;
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}
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static inline int
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of_pci_parse_bus_range(struct device_node *node, struct resource *res)
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{
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return -EINVAL;
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}
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static inline int
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of_get_pci_domain_nr(struct device_node *node)
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{
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return -1;
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}
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static inline int of_pci_map_rid(struct device_node *np, u32 rid,
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const char *map_name, const char *map_mask_name,
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struct device_node **target, u32 *id_out)
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{
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return -EINVAL;
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}
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static inline int
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of_pci_get_max_link_speed(struct device_node *node)
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{
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return -EINVAL;
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}
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static inline void of_pci_check_probe_only(void) { }
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#endif
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#if defined(CONFIG_OF_ADDRESS)
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int of_pci_get_host_bridge_resources(struct device_node *dev,
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unsigned char busno, unsigned char bus_max,
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struct list_head *resources, resource_size_t *io_base);
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#else
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static inline int of_pci_get_host_bridge_resources(struct device_node *dev,
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unsigned char busno, unsigned char bus_max,
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struct list_head *resources, resource_size_t *io_base)
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{
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return -EINVAL;
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}
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#endif
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#if defined(CONFIG_OF) && defined(CONFIG_PCI_MSI)
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int of_pci_msi_chip_add(struct msi_controller *chip);
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void of_pci_msi_chip_remove(struct msi_controller *chip);
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struct msi_controller *of_pci_find_msi_chip_by_node(struct device_node *of_node);
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#else
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static inline int of_pci_msi_chip_add(struct msi_controller *chip) { return -EINVAL; }
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static inline void of_pci_msi_chip_remove(struct msi_controller *chip) { }
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static inline struct msi_controller *
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of_pci_find_msi_chip_by_node(struct device_node *of_node) { return NULL; }
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#endif
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#endif
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