Introduce device_is_on_pci_bus() which can be utilized by driver to test if a device is on a PCI bus.
Signed-off-by: Bin Meng bmeng.cn@gmail.com
---
Changes in v2: - New patch to add an inline API to test if a device is on a PCI bus
drivers/pci/pci-uclass.c | 4 ++-- include/pci.h | 15 +++++++++++++++ 2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index b25298f..79a05cb 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -218,7 +218,7 @@ int dm_pci_write_config(struct udevice *dev, int offset, unsigned long value, { struct udevice *bus;
- for (bus = dev; device_get_uclass_id(bus->parent) == UCLASS_PCI;) + for (bus = dev; device_is_on_pci_bus(bus);) bus = bus->parent; return pci_bus_write_config(bus, pci_get_bdf(dev), offset, value, size); } @@ -283,7 +283,7 @@ int dm_pci_read_config(struct udevice *dev, int offset, unsigned long *valuep, { struct udevice *bus;
- for (bus = dev; device_get_uclass_id(bus->parent) == UCLASS_PCI;) + for (bus = dev; device_is_on_pci_bus(bus);) bus = bus->parent; return pci_bus_read_config(bus, pci_get_bdf(dev), offset, valuep, size); diff --git a/include/pci.h b/include/pci.h index e24c970..293a021 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1273,5 +1273,20 @@ struct pci_driver_entry { .match = __match, \ }
+#ifdef CONFIG_DM +#include <dm.h> + +/** + * device_is_on_pci_bus - Test if a device is on a PCI bus + * + * @dev: device to test + * @return: true if it is on a PCI bus, false otherwise + */ +static inline bool device_is_on_pci_bus(struct udevice *dev) +{ + return device_get_uclass_id(dev->parent) == UCLASS_PCI; +} +#endif + #endif /* __ASSEMBLY__ */ #endif /* _PCI_H */