This part of driver model is a little subtle, so add some more comments
to promote better understanding.
Signed-off-by: Simon Glass <s...@chromium.org>
---
drivers/core/lists.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/core/lists.c b/drivers/core/lists.c
index 2839a9b7371..a84e6a98cb1 100644
--- a/drivers/core/lists.c
+++ b/drivers/core/lists.c
@@ -8,6 +8,7 @@
#define LOG_CATEGORY LOGC_DM
+#include <debug_uart.h>
#include <errno.h>
#include <log.h>
#include <dm/device.h>
@@ -50,6 +51,21 @@ struct uclass_driver *lists_uclass_lookup(enum uclass_id id)
return NULL;
}
+/**
+ * bind_drivers_pass() - Perform a pass of driver binding
+ *
+ * Work through the driver_info records binding a driver for each one. If the
+ * binding fails, continue binding others, but return the error.
+ *
+ * For OF_PLATDATA we must bind parent devices before their children. So only
+ * children of bound parents are bound on each call to this function. When a
+ * child is left unbound, -EAGAIN is returned, indicating that this function
+ * should be called again
+ *
+ * @parent: Parent device to use when binding each child device
+ * Return: 0 if OK, -EAGAIN if unbound children exist, -ENOENT if there is no
+ * driver for one of the devices, other -ve on other error
+ */
static int bind_drivers_pass(struct udevice *parent, bool pre_reloc_only)
{
struct driver_info *info =
--
2.34.1
