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dm: pci: Add an inline API to test if a device is on a PCI bus 

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>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-09-11 03:24:34 -07:00 committed by Simon Glass
parent fa43ce842c
commit 1e0f226362
2 changed files with 13 additions and 2 deletions
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4
drivers/pci/pci-uclass.c
View File

@ -238,7 +238,7 @@ 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);
}
@ -303,7 +303,7 @@ 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);

11
include/dm/device.h
View File

@ -485,6 +485,17 @@ bool device_is_last_sibling(struct udevice *dev);
*/
int device_set_name(struct udevice *dev, const char *name);
/**
* 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;
}
/* device resource management */
typedef void (*dr_release_t)(struct udevice *dev, void *res);
typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);