ARC: init debug uart in early common arc code

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@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S
index 3fb05606c7b6b6161454cc31d7d78a4f5c7f2110..e573ce7718b9bd38b370b215032df1397d569809 100644 (file)
--- a/arch/arc/lib/start.S
+++ b/arch/arc/lib/start.S
@@ -75,6 +75,11 @@ 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