[U-Boot] [PATCH 1/2] ARC: init debug uart in early common arc code

[Eugeniy Paltsev]

The debug UART is intended for use very early in U-Boot to debug
problems before serial drivers are up.

Call debug_uart_init right before board_init_f.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
---
 arch/arc/lib/start.S | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S
index c78dd001d81..cb8ea0fd363 100644
--- a/arch/arc/lib/start.S
+++ b/arch/arc/lib/start.S
@@ -76,6 +76,11 @@ ENTRY(_start)
 	/* Initialize reserved area - note: r0 already contains address */
 	bl	board_init_f_init_reserve
 
+#ifdef CONFIG_DEBUG_UART
+	/* Earliest point to set up early debug uart */
+	bl	debug_uart_init
+#endif
+
 	/* Zero the one and only argument of "board_init_f" */
 	mov_s	%r0, 0
 	bl	board_init_f
-- 
2.14.3