x86: fsp: Call fsp_init_phase_pci() in pci_uclass_post_probe()

[karo-tx-uboot.git] / drivers / pci / pci-uclass.c

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 416027438f1850f518a71be359caed40bf707e00..c90e7ac8dd77cc55f375d827223c41e4ac28fa85 100644 (file)
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -14,6 +14,9 @@
 #include <dm/lists.h>
 #include <dm/root.h>
 #include <dm/device-internal.h>
+#if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
+#include <asm/fsp/fsp_support.h>
+#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -749,6 +752,24 @@ static int pci_uclass_post_probe(struct udevice *bus)
        ret = pci_auto_config_devices(bus);
 #endif
 
+#if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
+       /*
+        * Per Intel FSP specification, we should call FSP notify API to
+        * inform FSP that PCI enumeration has been done so that FSP will
+        * do any necessary initialization as required by the chipset's
+        * BIOS Writer's Guide (BWG).
+        *
+        * Unfortunately we have to put this call here as with driver model,
+        * the enumeration is all done on a lazy basis as needed, so until
+        * something is touched on PCI it won't happen.
+        *
+        * Note we only call this 1) after U-Boot is relocated, and 2)
+        * root bus has finished probing.
+        */
+       if ((gd->flags & GD_FLG_RELOC) && (bus->seq == 0))
+               ret = fsp_init_phase_pci();
+#endif
+
        return ret < 0 ? ret : 0;
 }