diff options
Diffstat (limited to 'drivers/core')
| -rw-r--r-- | drivers/core/device.c | 4 | ||||
| -rw-r--r-- | drivers/core/root.c | 5 | ||||
| -rw-r--r-- | drivers/core/uclass.c | 7 |
3 files changed, 13 insertions, 3 deletions
diff --git a/drivers/core/device.c b/drivers/core/device.c index a6cd93698f5..0ccd443f252 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -39,8 +39,10 @@ int device_bind(struct udevice *parent, const struct driver *drv, return -EINVAL; ret = uclass_get(drv->id, &uc); - if (ret) + if (ret) { + debug("Missing uclass for driver %s\n", drv->name); return ret; + } dev = calloc(1, sizeof(struct udevice)); if (!dev) diff --git a/drivers/core/root.c b/drivers/core/root.c index 78ab00c7bfb..bdb394a9ae2 100644 --- a/drivers/core/root.c +++ b/drivers/core/root.c @@ -162,8 +162,11 @@ int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset, continue; } err = lists_bind_fdt(parent, blob, offset, NULL); - if (err && !ret) + if (err && !ret) { ret = err; + debug("%s: ret=%d\n", fdt_get_name(blob, offset, NULL), + ret); + } } if (ret) diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c index f63ff599a69..e800c28653f 100644 --- a/drivers/core/uclass.c +++ b/drivers/core/uclass.c @@ -58,7 +58,12 @@ static int uclass_add(enum uclass_id id, struct uclass **ucp) if (!uc_drv) { debug("Cannot find uclass for id %d: please add the UCLASS_DRIVER() declaration for this UCLASS_... id\n", id); - return -ENOENT; + /* + * Use a strange error to make this case easier to find. When + * a uclass is not available it can prevent driver model from + * starting up and this failure is otherwise hard to debug. + */ + return -EPFNOSUPPORT; } uc = calloc(1, sizeof(*uc)); if (!uc) |