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

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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
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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;
}
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,
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,
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
*/