*ucp = NULL;
uc_drv = lists_uclass_lookup(id);
if (!uc_drv) {
- dm_warn("Cannot find uclass for id %d: please add the UCLASS_DRIVER() declaration for this UCLASS_... id\n",
- id);
- return -ENOENT;
- }
- if (uc_drv->ops) {
- dm_warn("No ops for uclass id %d\n", id);
- return -EINVAL;
+ debug("Cannot find uclass for id %d: please add the UCLASS_DRIVER() declaration for this UCLASS_... id\n",
+ id);
+ /*
+ * 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)
int uclass_destroy(struct uclass *uc)
{
struct uclass_driver *uc_drv;
- struct udevice *dev, *tmp;
+ struct udevice *dev;
int ret;
- list_for_each_entry_safe(dev, tmp, &uc->dev_head, uclass_node) {
+ /*
+ * We cannot use list_for_each_entry_safe() here. If a device in this
+ * uclass has a child device also in this uclass, it will be also be
+ * unbound (by the recursion in the call to device_unbind() below).
+ * We can loop until the list is empty.
+ */
+ while (!list_empty(&uc->dev_head)) {
+ dev = list_first_entry(&uc->dev_head, struct udevice,
+ uclass_node);
ret = device_remove(dev);
if (ret)
return ret;
ret = uclass_get(id, &uc);
if (ret)
return ret;
+ if (list_empty(&uc->dev_head))
+ return -ENODEV;
list_for_each_entry(dev, &uc->dev_head, uclass_node) {
if (!index--) {
return -ENODEV;
}
+int uclass_find_first_device(enum uclass_id id, struct udevice **devp)
+{
+ struct uclass *uc;
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+ if (list_empty(&uc->dev_head))
+ return 0;
+
+ *devp = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
+
+ return 0;
+}
+
+int uclass_find_next_device(struct udevice **devp)
+{
+ struct udevice *dev = *devp;
+
+ *devp = NULL;
+ if (list_is_last(&dev->uclass_node, &dev->uclass->dev_head))
+ return 0;
+
+ *devp = list_entry(dev->uclass_node.next, struct udevice, uclass_node);
+
+ return 0;
+}
+
+int uclass_find_device_by_name(enum uclass_id id, const char *name,
+ struct udevice **devp)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ if (!name)
+ return -EINVAL;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+ if (!strncmp(dev->name, name, strlen(name))) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
bool find_req_seq, struct udevice **devp)
{
return -ENODEV;
}
-/**
- * uclass_get_device_tail() - handle the end of a get_device call
- *
- * This handles returning an error or probing a device as needed.
- *
- * @dev: Device that needs to be probed
- * @ret: Error to return. If non-zero then the device is not probed
- * @devp: Returns the value of 'dev' if there is no error
- * @return ret, if non-zero, else the result of the device_probe() call
- */
-static int uclass_get_device_tail(struct udevice *dev, int ret,
+static int uclass_find_device_by_phandle(enum uclass_id id,
+ struct udevice *parent,
+ const char *name,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ int find_phandle;
+ int ret;
+
+ *devp = NULL;
+ find_phandle = fdtdec_get_int(gd->fdt_blob, parent->of_offset, name,
+ -1);
+ if (find_phandle <= 0)
+ return -ENOENT;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+ uint phandle = fdt_get_phandle(gd->fdt_blob, dev->of_offset);
+
+ if (phandle == find_phandle) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int uclass_get_device_tail(struct udevice *dev, int ret,
struct udevice **devp)
{
if (ret)
return ret;
+ assert(dev);
ret = device_probe(dev);
if (ret)
return ret;
return uclass_get_device_tail(dev, ret, devp);
}
+int uclass_get_device_by_name(enum uclass_id id, const char *name,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_find_device_by_name(id, name, &dev);
+ return uclass_get_device_tail(dev, ret, devp);
+}
+
int uclass_get_device_by_seq(enum uclass_id id, int seq, struct udevice **devp)
{
struct udevice *dev;
return uclass_get_device_tail(dev, ret, devp);
}
-int uclass_first_device(enum uclass_id id, struct udevice **devp)
+int uclass_get_device_by_phandle(enum uclass_id id, struct udevice *parent,
+ const char *name, struct udevice **devp)
{
- struct uclass *uc;
struct udevice *dev;
int ret;
*devp = NULL;
- ret = uclass_get(id, &uc);
- if (ret)
- return ret;
- if (list_empty(&uc->dev_head))
- return 0;
+ ret = uclass_find_device_by_phandle(id, parent, name, &dev);
+ return uclass_get_device_tail(dev, ret, devp);
+}
- dev = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
- ret = device_probe(dev);
- if (ret)
- return ret;
- *devp = dev;
+int uclass_first_device(enum uclass_id id, struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
- return 0;
+ *devp = NULL;
+ ret = uclass_find_first_device(id, &dev);
+ if (!dev)
+ return 0;
+ return uclass_get_device_tail(dev, ret, devp);
}
int uclass_next_device(struct udevice **devp)
int ret;
*devp = NULL;
- if (list_is_last(&dev->uclass_node, &dev->uclass->dev_head))
+ ret = uclass_find_next_device(&dev);
+ if (!dev)
return 0;
-
- dev = list_entry(dev->uclass_node.next, struct udevice,
- uclass_node);
- ret = device_probe(dev);
- if (ret)
- return ret;
- *devp = dev;
-
- return 0;
+ return uclass_get_device_tail(dev, ret, devp);
}
int uclass_bind_device(struct udevice *dev)
int ret;
uc = dev->uclass;
-
list_add_tail(&dev->uclass_node, &uc->dev_head);
+ if (dev->parent) {
+ struct uclass_driver *uc_drv = dev->parent->uclass->uc_drv;
+
+ if (uc_drv->child_post_bind) {
+ ret = uc_drv->child_post_bind(dev);
+ if (ret)
+ goto err;
+ }
+ }
if (uc->uc_drv->post_bind) {
ret = uc->uc_drv->post_bind(dev);
- if (ret) {
- list_del(&dev->uclass_node);
- return ret;
- }
+ if (ret)
+ goto err;
}
return 0;
+err:
+ /* There is no need to undo the parent's post_bind call */
+ list_del(&dev->uclass_node);
+
+ return ret;
}
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
int uclass_unbind_device(struct udevice *dev)
{
struct uclass *uc;
list_del(&dev->uclass_node);
return 0;
}
+#endif
int uclass_resolve_seq(struct udevice *dev)
{
return seq;
}
+int uclass_pre_probe_device(struct udevice *dev)
+{
+ struct uclass_driver *uc_drv;
+ int ret;
+
+ uc_drv = dev->uclass->uc_drv;
+ if (uc_drv->pre_probe) {
+ ret = uc_drv->pre_probe(dev);
+ if (ret)
+ return ret;
+ }
+
+ if (!dev->parent)
+ return 0;
+ uc_drv = dev->parent->uclass->uc_drv;
+ if (uc_drv->child_pre_probe)
+ return uc_drv->child_pre_probe(dev);
+
+ return 0;
+}
+
int uclass_post_probe_device(struct udevice *dev)
{
struct uclass_driver *uc_drv = dev->uclass->uc_drv;
return 0;
}
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
int uclass_pre_remove_device(struct udevice *dev)
{
- struct uclass_driver *uc_drv;
struct uclass *uc;
int ret;
uc = dev->uclass;
- uc_drv = uc->uc_drv;
if (uc->uc_drv->pre_remove) {
ret = uc->uc_drv->pre_remove(dev);
if (ret)
return ret;
}
- if (uc_drv->per_device_auto_alloc_size) {
- free(dev->uclass_priv);
- dev->uclass_priv = NULL;
- }
- dev->seq = -1;
return 0;
}
+#endif
projects / J-u-boot.git / blobdiff