[U-Boot] [PATCH] pci: Support parsing PCI controller DT subnodes

Marek Vasut
2018-08-08T13:03:02Z

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>
---
drivers/pci/pci-uclass.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 46e9c71bdf..306bea0dbf 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -662,6 +662,8 @@ static int pci_find_and_bind_driver(struct udevice *parent,
for (id = entry->match;
id->vendor || id->subvendor || id->class_mask;
id++) {
+ ofnode node;
+
if (!pci_match_one_id(id, find_id))
continue;

@@ -691,6 +693,18 @@ static int pci_find_and_bind_driver(struct udevice *parent,
goto error;
debug("%s: Match found: %s\n", __func__, drv->name);
dev->driver_data = find_id->driver_data;
+
+ dev_for_each_subnode(node, parent) {
+ phys_addr_t df, size;
+ df = ofnode_get_addr_size(node, "reg", &size);
+
+ if (PCI_FUNC(df) == PCI_FUNC(bdf) &&
+ PCI_DEV(df) == PCI_DEV(bdf)) {
+ dev->node = node;
+ break;
+ }
+ }
+
*devp = dev;
return 0;
}
--
2.16.2