*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <dm/device.h>
*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;
+ 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) {
- ret = device_remove(dev);
+ /*
+ * 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, DM_REMOVE_NORMAL);
if (ret)
return ret;
ret = device_unbind(dev);
return 0;
}
+const char *uclass_get_name(enum uclass_id id)
+{
+ struct uclass *uc;
+
+ if (uclass_get(id, &uc))
+ return NULL;
+ return uc->uc_drv->name;
+}
+
int uclass_find_device(enum uclass_id id, int index, struct udevice **devp)
{
struct uclass *uc;
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 ret;
list_for_each_entry(dev, &uc->dev_head, uclass_node) {
- debug(" - %d %d\n", dev->req_seq, dev->seq);
+ debug(" - %d %d '%s'\n", dev->req_seq, dev->seq, dev->name);
if ((find_req_seq ? dev->req_seq : dev->seq) ==
seq_or_req_seq) {
*devp = dev;
return -ENODEV;
}
-static int uclass_find_device_by_of_offset(enum uclass_id id, int node,
- struct udevice **devp)
+int uclass_find_device_by_of_offset(enum uclass_id id, int node,
+ struct udevice **devp)
{
struct uclass *uc;
struct udevice *dev;
return ret;
list_for_each_entry(dev, &uc->dev_head, uclass_node) {
- if (dev->of_offset == node) {
+ if (dev_of_offset(dev) == node) {
*devp = dev;
return 0;
}
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,
- struct udevice **devp)
+int uclass_find_device_by_ofnode(enum uclass_id id, ofnode node,
+ struct udevice **devp)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ if (!ofnode_valid(node))
+ return -ENODEV;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+ if (ofnode_equal(dev_ofnode(dev), node)) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+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 = dev_read_u32_default(parent, 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;
+
+ phandle = dev_read_phandle(dev);
+
+ if (phandle == find_phandle) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+#endif
+
+int uclass_get_device_by_driver(enum uclass_id id,
+ const struct driver *find_drv,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ int ret;
+
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+ if (dev->driver == find_drv)
+ return uclass_get_device_tail(dev, 0, devp);
+ }
+
+ 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_get_device_by_ofnode(enum uclass_id id, ofnode node,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_find_device_by_ofnode(id, node, &dev);
+
+ return uclass_get_device_tail(dev, ret, devp);
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+int uclass_get_device_by_phandle(enum uclass_id id, struct udevice *parent,
+ const char *name, struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_find_device_by_phandle(id, parent, name, &dev);
+ return uclass_get_device_tail(dev, ret, devp);
+}
+#endif
+
int uclass_first_device(enum uclass_id id, 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))
+ ret = uclass_find_first_device(id, &dev);
+ if (!dev)
return 0;
+ return uclass_get_device_tail(dev, ret, devp);
+}
- dev = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
- ret = device_probe(dev);
+int uclass_first_device_err(enum uclass_id id, struct udevice **devp)
+{
+ int ret;
+
+ ret = uclass_first_device(id, devp);
if (ret)
return ret;
- *devp = dev;
+ else if (!*devp)
+ return -ENODEV;
return 0;
}
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;
+ return uclass_get_device_tail(dev, ret, devp);
+}
- dev = list_entry(dev->uclass_node.next, struct udevice,
- uclass_node);
- ret = device_probe(dev);
+int uclass_first_device_check(enum uclass_id id, struct udevice **devp)
+{
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_find_first_device(id, devp);
if (ret)
return ret;
- *devp = dev;
+ if (!*devp)
+ return 0;
- return 0;
+ return device_probe(*devp);
+}
+
+int uclass_next_device_check(struct udevice **devp)
+{
+ int ret;
+
+ ret = uclass_find_next_device(devp);
+ if (ret)
+ return ret;
+ if (!*devp)
+ return 0;
+
+ return device_probe(*devp);
}
int uclass_bind_device(struct udevice *dev)
goto err;
}
}
- if (uc->uc_drv->post_bind) {
- ret = uc->uc_drv->post_bind(dev);
- if (ret)
- goto err;
- }
return 0;
err:
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 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 / u-boot / blobdiff