The PCI controller can have DT subnodes describing extra properties of particular PCI devices, ie. a PHY attached to an EHCI controller on a PCI bus. This patch parses those DT subnodes and assigns a node to the PCI device instance, so that the driver can extract details from that node and ie. configure the PHY using the PHY subsystem.
Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Simon Glass sjg@chromium.org Cc: Tom Rini trini@konsulko.com --- drivers/pci/pci-uclass.c | 30 +++++++++++++++++++++++++++--- 1 file changed, 27 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index de523a76ad..e274632428 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -90,6 +90,25 @@ int pci_get_ff(enum pci_size_t size) } }
+static void pci_dev_find_ofnode(struct udevice *bus, phys_addr_t bdf, + ofnode *rnode) +{ + ofnode node; + + dev_for_each_subnode(node, bus) { + phys_addr_t df, size; + df = ofnode_get_addr_size(node, "reg", &size); + if (df == FDT_ADDR_T_NONE) + continue; + + if (PCI_MASK_BUS(df) != PCI_MASK_BUS(bdf)) + continue; + + *rnode = node; + break; + } +}; + int pci_bus_find_devfn(struct udevice *bus, pci_dev_t find_devfn, struct udevice **devp) { @@ -641,6 +660,7 @@ static int pci_find_and_bind_driver(struct udevice *parent, pci_dev_t bdf, struct udevice **devp) { struct pci_driver_entry *start, *entry; + ofnode node = ofnode_null(); const char *drv; int n_ents; int ret; @@ -651,6 +671,10 @@ static int pci_find_and_bind_driver(struct udevice *parent,
debug("%s: Searching for driver: vendor=%x, device=%x\n", __func__, find_id->vendor, find_id->device); + + /* Determine optional OF node */ + pci_dev_find_ofnode(parent, bdf, &node); + start = ll_entry_start(struct pci_driver_entry, pci_driver_entry); n_ents = ll_entry_count(struct pci_driver_entry, pci_driver_entry); for (entry = start; entry != start + n_ents; entry++) { @@ -684,8 +708,8 @@ static int pci_find_and_bind_driver(struct udevice *parent, * find another driver. For now this doesn't seem * necesssary, so just bind the first match. */ - ret = device_bind(parent, drv, drv->name, NULL, -1, - &dev); + ret = device_bind_ofnode(parent, drv, drv->name, NULL, + node, &dev); if (ret) goto error; debug("%s: Match found: %s\n", __func__, drv->name); @@ -712,7 +736,7 @@ static int pci_find_and_bind_driver(struct udevice *parent, return -ENOMEM; drv = bridge ? "pci_bridge_drv" : "pci_generic_drv";
- ret = device_bind_driver(parent, drv, str, devp); + ret = device_bind_driver_to_node(parent, drv, str, node, devp); if (ret) { debug("%s: Failed to bind generic driver: %d\n", __func__, ret); free(str);