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| author | Simon Glass <sjg@chromium.org> | 2020-12-16 21:20:17 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2020-12-18 20:32:21 -0700 |
| commit | 15a1196be81c6bfc847a58dc65151ce439630f7d (patch) | |
| tree | 73bfe631752d843842c6efea66c14eba54c415b8 | |
| parent | 552da3357b5139b9b0e4d2c2917820e996ae865e (diff) | |
| download | u-boot-15a1196be81c6bfc847a58dc65151ce439630f7d.zip u-boot-15a1196be81c6bfc847a58dc65151ce439630f7d.tar.gz u-boot-15a1196be81c6bfc847a58dc65151ce439630f7d.tar.bz2 | |
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>
| -rw-r--r-- | drivers/core/device.c | 2 | ||||
| -rw-r--r-- | include/dm/uclass.h | 3 |
2 files changed, 4 insertions, 1 deletions
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 @@ static int device_bind_common(struct udevice *parent, const struct driver *drv, 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 @@ struct udevice; /* 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) |