[U-Boot] [PATCH v4 02/15] dm: Adjust lists_bind_fdt() to return the bound device

[Simon Glass]

Allow the caller to find out the device that was bound in response to this
call.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v4: None
Changes in v3:
- Add new change to enhance lists_bind_fdt()

Changes in v2: None

 drivers/core/lists.c | 10 +++++++---
 drivers/core/root.c  |  2 +-
 include/dm/lists.h   |  6 +++++-
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/core/lists.c b/drivers/core/lists.c
index 0f08bfd..699f94b 100644
--- a/drivers/core/lists.c
+++ b/drivers/core/lists.c
@@ -118,7 +118,8 @@ static int driver_check_compatible(const void *blob, int offset,
 	return -ENOENT;
 }
 
-int lists_bind_fdt(struct udevice *parent, const void *blob, int offset)
+int lists_bind_fdt(struct udevice *parent, const void *blob, int offset,
+		   struct udevice **devp)
 {
 	struct driver *driver = ll_entry_start(struct driver, driver);
 	const int n_ents = ll_entry_count(struct driver, driver);
@@ -130,6 +131,8 @@ int lists_bind_fdt(struct udevice *parent, const void *blob, int offset)
 	int ret = 0;
 
 	dm_dbg("bind node %s\n", fdt_get_name(blob, offset, NULL));
+	if (devp)
+		*devp = NULL;
 	for (entry = driver; entry != driver + n_ents; entry++) {
 		ret = driver_check_compatible(blob, offset, entry->of_match);
 		name = fdt_get_name(blob, offset, NULL);
@@ -149,10 +152,11 @@ int lists_bind_fdt(struct udevice *parent, const void *blob, int offset)
 		ret = device_bind(parent, entry, name, NULL, offset, &dev);
 		if (ret) {
 			dm_warn("Error binding driver '%s'\n", entry->name);
-			if (!result || ret != -ENOENT)
-				result = ret;
+			return ret;
 		} else {
 			found = true;
+			if (devp)
+				*devp = dev;
 		}
 		break;
 	}
diff --git a/drivers/core/root.c b/drivers/core/root.c
index 393dd98..a328a48 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -91,7 +91,7 @@ int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
 		if (pre_reloc_only &&
 		    !fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL))
 			continue;
-		err = lists_bind_fdt(parent, blob, offset);
+		err = lists_bind_fdt(parent, blob, offset, NULL);
 		if (err && !ret)
 			ret = err;
 	}
diff --git a/include/dm/lists.h b/include/dm/lists.h
index 87a3af5..2356895 100644
--- a/include/dm/lists.h
+++ b/include/dm/lists.h
@@ -53,7 +53,11 @@ int lists_bind_drivers(struct udevice *parent, bool pre_reloc_only);
  * @parent: parent driver (root)
  * @blob: device tree blob
  * @offset: offset of this device tree node
+ * @devp: if non-NULL, returns a pointer to the bound device
+ * @return 0 if device was bound, -EINVAL if the device tree is invalid,
+ * other -ve value on error
  */
-int lists_bind_fdt(struct udevice *parent, const void *blob, int offset);
+int lists_bind_fdt(struct udevice *parent, const void *blob, int offset,
+		   struct udevice **devp);
 
 #endif
-- 
2.0.0.526.g5318336