dm: core: Allow manual sequence numbering
Some buses have their own rules which require assigning sequence numbers
with a bus-specific algorithm. For example, PCI requires that sub-buses
are numbered higher than their parent buses, meaning effectively that
parent buses must be numbered only after all of their child buses have
been numbered.
Add a uclass flag to indicate that driver model should not assign sequence
numbers. In this case, the uclass must do it.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 1e68133..d2cf05c 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -103,7 +103,7 @@
dev->req_seq = uclass_find_next_free_req_seq(uc);
}
}
- if (auto_seq)
+ if (auto_seq && !(uc->uc_drv->flags & DM_UC_FLAG_NO_AUTO_SEQ))
dev->sqq = uclass_find_next_free_req_seq(uc);
if (drv->plat_auto) {
diff --git a/include/dm/uclass.h b/include/dm/uclass.h
index 068e8ea..c4cd583 100644
--- a/include/dm/uclass.h
+++ b/include/dm/uclass.h
@@ -44,6 +44,9 @@
/* Members of this uclass sequence themselves with aliases */
#define DM_UC_FLAG_SEQ_ALIAS (1 << 0)
+/* Members of this uclass without aliases don't get a sequence number */
+#define DM_UC_FLAG_NO_AUTO_SEQ (1 << 1)
+
/* Same as DM_FLAG_ALLOC_PRIV_DMA */
#define DM_UC_FLAG_ALLOC_PRIV_DMA (1 << 5)