Shutdown U-Boot before starting an OS

Some devices, especially the ones doing DMA should be disabled before
giving control to an OS. We take the simple approach here: Just shutdown
the devices in the reverse order they were activated.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/common/startup.c b/common/startup.c
index 3a37eed293..7179f81203 100644
--- a/common/startup.c
+++ b/common/startup.c
@@ -156,3 +156,13 @@ void hang (void)
 	puts ("### ERROR ### Please RESET the board ###\n");
 	for (;;);
 }
+
+/* Everything needed to cleanly shutdown U-Boot.
+ * Should be called before starting an OS to get
+ * the devices into a clean state
+ */
+void shutdown_uboot(void)
+{
+	devices_shutdown();
+}
+