| Message ID | 1447732444-30892-6-git-send-email-sjg@chromium.org |
|---|---|
| State | Accepted |
| Commit | a0eb835635abe0952529e3eb5207a24ac36fa000 |
| Delegated to: | Simon Glass |
| Headers | show |
On Tue, Nov 17, 2015 at 11:53 AM, Simon Glass <sjg@chromium.org> wrote: > 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> > --- > > drivers/pci/pci-uclass.c | 20 ++++++++++++++++++++ > include/pci.h | 10 ++++++++++ > 2 files changed, 30 insertions(+) > > diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c > index 6376e43..929d772 100644 > --- a/drivers/pci/pci-uclass.c > +++ b/drivers/pci/pci-uclass.c > @@ -233,6 +233,26 @@ 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) > { > diff --git a/include/pci.h b/include/pci.h > index f29804f..d4f6e02 100644 > --- a/include/pci.h > +++ b/include/pci.h > @@ -1186,6 +1186,16 @@ 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 > */ > struct dm_pci_emul_ops { > -- Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 6376e43..929d772 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -233,6 +233,26 @@ 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) { diff --git a/include/pci.h b/include/pci.h index f29804f..d4f6e02 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1186,6 +1186,16 @@ 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 */ struct dm_pci_emul_ops {
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> --- drivers/pci/pci-uclass.c | 20 ++++++++++++++++++++ include/pci.h | 10 ++++++++++ 2 files changed, 30 insertions(+)