[U-Boot] [PATCH v2 6/7] board: sama5d3_xplained: enable early debug UART

[Wenyou Yang]

Enable early debug UART to debug problems when an ICE or other
debug mechanism is not available.

Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
---

Changes in v2: None

 board/atmel/sama5d3_xplained/sama5d3_xplained.c | 16 +++++++++++++++-
 configs/sama5d3_xplained_mmc_defconfig          |  6 ++++++
 configs/sama5d3_xplained_nandflash_defconfig    |  6 ++++++
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/board/atmel/sama5d3_xplained/sama5d3_xplained.c b/board/atmel/sama5d3_xplained/sama5d3_xplained.c
index c4d67a7748..692fec66a7 100644
--- a/board/atmel/sama5d3_xplained/sama5d3_xplained.c
+++ b/board/atmel/sama5d3_xplained/sama5d3_xplained.c
@@ -12,6 +12,7 @@
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
+#include <debug_uart.h>
 #include <net.h>
 #include <netdev.h>
 #include <spl.h>
@@ -67,12 +68,25 @@ static void sama5d3_xplained_mci0_hw_init(void)
 }
 #endif
 
-int board_early_init_f(void)
+#ifdef CONFIG_DEBUG_UART_BOARD_INIT
+void board_debug_uart_init(void)
 {
 	at91_seriald_hw_init();
+}
+#endif
 
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int board_early_init_f(void)
+{
+#ifdef CONFIG_DEBUG_UART
+	debug_uart_init();
+#else
+	sama5d4_xplained_serial3_hw_init();
+	at91_seriald_hw_init();
+#endif
 	return 0;
 }
+#endif
 
 int board_init(void)
 {
diff --git a/configs/sama5d3_xplained_mmc_defconfig b/configs/sama5d3_xplained_mmc_defconfig
index 8940f1633b..a9890cc3d3 100644
--- a/configs/sama5d3_xplained_mmc_defconfig
+++ b/configs/sama5d3_xplained_mmc_defconfig
@@ -46,6 +46,12 @@ CONFIG_GENERIC_ATMEL_MCI=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_AT91=y
 CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_UART=y
+CONFIG_DEBUG_UART_ATMEL=y
+CONFIG_DEBUG_UART_BASE=0xffffee00
+CONFIG_DEBUG_UART_CLOCK=0
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
diff --git a/configs/sama5d3_xplained_nandflash_defconfig b/configs/sama5d3_xplained_nandflash_defconfig
index 6020513e17..05798d666c 100644
--- a/configs/sama5d3_xplained_nandflash_defconfig
+++ b/configs/sama5d3_xplained_nandflash_defconfig
@@ -44,6 +44,12 @@ CONFIG_GENERIC_ATMEL_MCI=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_AT91=y
 CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_UART=y
+CONFIG_DEBUG_UART_ATMEL=y
+CONFIG_DEBUG_UART_BASE=0xffffee00
+CONFIG_DEBUG_UART_CLOCK=0
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
-- 
2.11.0