diff mbox series

[V9,3/6] PCI: Add PCI quirks to generate device tree node for Xilinx Alveo U50

Message ID 1686847842-33780-4-git-send-email-lizhi.hou@amd.com
State New
Headers
Series Generate device tree node for pci devices |

Commit Message

Lizhi Hou June 15, 2023, 4:50 p.m. UTC 
  The Xilinx Alveo U50 PCI card exposes multiple hardware peripherals on
its PCI BAR. The card firmware provides a flattened device tree to
describe the hardware peripherals on its BARs. This allows U50 driver to
load the flattened device tree and generate the device tree node for
hardware peripherals underneath.

To generate device tree node for U50 card, added PCI quirks to call
of_pci_make_dev_node() for U50.

Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
---
 drivers/pci/quirks.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index c525867760bf..c8f3acea752d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -6041,3 +6041,14 @@  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size);
 #endif
+
+/*
+ * For PCI device which have multiple downstream devices, its driver may use
+ * a flattened device tree to describe the downstream devices.
+ * To overlay the flattened device tree, the PCI device and all its ancestor
+ * devices need to have device tree nodes on system base device tree. Thus,
+ * before driver probing, it might need to add a device tree node as the final
+ * fixup.
+ */
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_XILINX, 0x5020, of_pci_make_dev_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_XILINX, 0x5021, of_pci_make_dev_node);