Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-05-08 19:11:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

dm: pci: Add a driver-model version of pci_find_class()

Browse source 
Add a function which scans the driver model device information rather
than scanning the PCI bus again.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-11-29 13:17:52 -07:00
parent 9fbdb94667
commit a0eb835635
2 changed files with 30 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

20
drivers/pci/pci-uclass.c
View file

@ -234,6 +234,26 @@ int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
return -ENODEV; return -ENODEV;
} }
int dm_pci_find_class(uint find_class, int index, struct udevice **devp)
{
struct udevice *dev;
/* Scan all known buses */
for (pci_find_first_device(&dev);
dev;
pci_find_next_device(&dev)) {
struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
if (pplat->class == find_class && !index--) {
*devp = dev;
return device_probe(*devp);
}
}
*devp = NULL;
return -ENODEV;
}
int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset, int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
unsigned long value, enum pci_size_t size) unsigned long value, enum pci_size_t size)
{ {

10
include/pci.h
View file

@ -1178,6 +1178,16 @@ int pci_get_regions(struct udevice *dev, struct pci_region **iop,
int dm_pci_find_device(unsigned int vendor, unsigned int device, int index, int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
struct udevice **devp); struct udevice **devp);
/**
* dm_pci_find_class() - find a device by class
*
* @find_class: 3-byte (24-bit) class value to find
* @index: 0 to find the first match, 1 for second, etc.
* @devp: Returns pointer to the device, if found
* @return 0 if found, -ve on error
*/
int dm_pci_find_class(uint find_class, int index, struct udevice **devp);
/** /**
* struct dm_pci_emul_ops - PCI device emulator operations * struct dm_pci_emul_ops - PCI device emulator operations
*/ */