dm: Make driver model available before board_init()

For some boards board_init() will change GPIOs, so we need to have driver
model available before then. Adjust the board init to arrange this, but
enable it for driver model only, just to be safe.

This does create additional #ifdef logic, but it is safer than trying to
make a pervasive change which may cause some boards to break.

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

1 files changed, 23 insertions, 1 deletions

diff --git a/include/stdio_dev.h b/include/stdio_dev.h
index a7d0825..268de8e 100644
--- a/include/stdio_dev.h
+++ b/include/stdio_dev.h
@@ -78,7 +78,29 @@ extern char *stdio_names[MAX_FILES];
  */
 int	stdio_register (struct stdio_dev * dev);
 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);
-int	stdio_init (void);
+
+/**
+ * stdio_init_tables() - set up stdio tables ready for devices
+ *
+ * This does not add any devices, but just prepares stdio for use.
+ */
+int stdio_init_tables(void);
+
+/**
+ * stdio_add_devices() - Add stdio devices to the table
+ *
+ * This makes calls to all the various subsystems that use stdio, to make
+ * them register with stdio.
+ */
+int stdio_add_devices(void);
+
+/**
+ * stdio_init() - Sets up stdio ready for use
+ *
+ * This calls stdio_init_tables() and stdio_add_devices()
+ */
+int stdio_init(void);
+
 void	stdio_print_current_devices(void);
 #ifdef CONFIG_SYS_STDIO_DEREGISTER
 int	stdio_deregister(const char *devname);