| Message ID | 1445104205-4079-7-git-send-email-sjg@chromium.org |
|---|---|
| State | Superseded |
| Delegated to: | Simon Glass |
| Headers | show |
Hi Simon, On Sun, Oct 18, 2015 at 1:50 AM, Simon Glass <sjg@chromium.org> wrote: > A PCI bus may be a bridge device where the controller is the bridge's > parent. Add a function to return the controller device, given a PCI device. > > Signed-off-by: Simon Glass <sjg@chromium.org> > --- > > drivers/pci/pci-uclass.c | 8 ++++++++ > include/pci.h | 8 ++++++++ > 2 files changed, 16 insertions(+) > > diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c > index 1c6df0f..527d3bb 100644 > --- a/drivers/pci/pci-uclass.c > +++ b/drivers/pci/pci-uclass.c > @@ -53,6 +53,14 @@ struct pci_controller *pci_bus_to_hose(int busnum) > return dev_get_uclass_priv(bus); > } > > +struct udevice *pci_get_controller(struct udevice *dev) > +{ > + while (device_get_uclass_id(dev->parent) == UCLASS_PCI) Please use device_is_on_pci_bus() API. > + dev = dev->parent; > + > + return dev; > +} > + > pci_dev_t pci_get_bdf(struct udevice *dev) > { > struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); > diff --git a/include/pci.h b/include/pci.h > index f40a83d..8b471ab 100644 > --- a/include/pci.h > +++ b/include/pci.h > @@ -1123,6 +1123,14 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset, > enum pci_size_t size); > > /** > + * pci_get_controller() - obtain the controller to use for a bus > + * > + * @dev: Device to check > + * @return pointer to the controller device for this bus > + */ > +struct udevice *pci_get_controller(struct udevice *dev); > + > +/** > * struct dm_pci_emul_ops - PCI device emulator operations > */ > struct dm_pci_emul_ops { > -- Regards, Bin
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 1c6df0f..527d3bb 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -53,6 +53,14 @@ struct pci_controller *pci_bus_to_hose(int busnum) return dev_get_uclass_priv(bus); } +struct udevice *pci_get_controller(struct udevice *dev) +{ + while (device_get_uclass_id(dev->parent) == UCLASS_PCI) + dev = dev->parent; + + return dev; +} + pci_dev_t pci_get_bdf(struct udevice *dev) { struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); diff --git a/include/pci.h b/include/pci.h index f40a83d..8b471ab 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1123,6 +1123,14 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset, enum pci_size_t size); /** + * pci_get_controller() - obtain the controller to use for a bus + * + * @dev: Device to check + * @return pointer to the controller device for this bus + */ +struct udevice *pci_get_controller(struct udevice *dev); + +/** * struct dm_pci_emul_ops - PCI device emulator operations */ struct dm_pci_emul_ops {
A PCI bus may be a bridge device where the controller is the bridge's parent. Add a function to return the controller device, given a PCI device. Signed-off-by: Simon Glass <sjg@chromium.org> --- drivers/pci/pci-uclass.c | 8 ++++++++ include/pci.h | 8 ++++++++ 2 files changed, 16 insertions(+)