[U-Boot] [PATCH v4 3/3] board: at91sam9x5ek: Enable early debug UART

[Wenyou Yang]

Enable the 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>
Reviewed-by: Simon Glass <sjg at chromium.org>
---

Changes in v4:
 - Rebase on the master branch (22e10be45) of u-boot-dm git tree.
 - Update the cover-letter.

Changes in v3:
 - Use CONFIG_DEBUG_UART_CLOCK as the input clock for the early
   debug UART.
 - Drop [PATCH 4/5] configs: at91sam9x5ek: move SYS_NO_FLASH to defconfig.

Changes in v2:
 - Rebase on the patch set:
        [RESEND PATCH v2] ARM: at91: add default config file for sama5d36ek CMP board
        http://lists.denx.de/pipermail/u-boot/2017-February/280525.html

 board/atmel/at91sam9x5ek/at91sam9x5ek.c  | 14 +++++++++++++-
 configs/at91sam9x5ek_dataflash_defconfig |  6 ++++++
 configs/at91sam9x5ek_mmc_defconfig       |  6 ++++++
 configs/at91sam9x5ek_nandflash_defconfig |  6 ++++++
 configs/at91sam9x5ek_spiflash_defconfig  |  6 ++++++
 5 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/board/atmel/at91sam9x5ek/at91sam9x5ek.c b/board/atmel/at91sam9x5ek/at91sam9x5ek.c
index 235b33725d..c661c77f83 100644
--- a/board/atmel/at91sam9x5ek/at91sam9x5ek.c
+++ b/board/atmel/at91sam9x5ek/at91sam9x5ek.c
@@ -12,6 +12,7 @@
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
+#include <debug_uart.h>
 #include <lcd.h>
 #include <atmel_hlcdc.h>
 #ifdef CONFIG_LCD_INFO
@@ -182,11 +183,22 @@ void lcd_show_board_info(void)
 #endif /* CONFIG_LCD_INFO */
 #endif /* CONFIG_LCD */
 
-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();
+#endif
 	return 0;
 }
+#endif
 
 int board_init(void)
 {
diff --git a/configs/at91sam9x5ek_dataflash_defconfig b/configs/at91sam9x5ek_dataflash_defconfig
index 7850b994d5..64707dbdaa 100644
--- a/configs/at91sam9x5ek_dataflash_defconfig
+++ b/configs/at91sam9x5ek_dataflash_defconfig
@@ -40,6 +40,12 @@ CONFIG_MACB=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=0xfffff200
+CONFIG_DEBUG_UART_CLOCK=132000000
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
 CONFIG_DM_SPI=y
 CONFIG_ATMEL_SPI=y
diff --git a/configs/at91sam9x5ek_mmc_defconfig b/configs/at91sam9x5ek_mmc_defconfig
index 5990778ada..ddeeeefa1e 100644
--- a/configs/at91sam9x5ek_mmc_defconfig
+++ b/configs/at91sam9x5ek_mmc_defconfig
@@ -40,6 +40,12 @@ CONFIG_MACB=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=0xfffff200
+CONFIG_DEBUG_UART_CLOCK=132000000
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
 CONFIG_DM_SPI=y
 CONFIG_ATMEL_SPI=y
diff --git a/configs/at91sam9x5ek_nandflash_defconfig b/configs/at91sam9x5ek_nandflash_defconfig
index 816fe69834..a26b38f330 100644
--- a/configs/at91sam9x5ek_nandflash_defconfig
+++ b/configs/at91sam9x5ek_nandflash_defconfig
@@ -40,6 +40,12 @@ CONFIG_MACB=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=0xfffff200
+CONFIG_DEBUG_UART_CLOCK=132000000
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
 CONFIG_DM_SPI=y
 CONFIG_ATMEL_SPI=y
diff --git a/configs/at91sam9x5ek_spiflash_defconfig b/configs/at91sam9x5ek_spiflash_defconfig
index 8574525bc2..75d25d8e61 100644
--- a/configs/at91sam9x5ek_spiflash_defconfig
+++ b/configs/at91sam9x5ek_spiflash_defconfig
@@ -40,6 +40,12 @@ CONFIG_MACB=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=0xfffff200
+CONFIG_DEBUG_UART_CLOCK=132000000
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
 CONFIG_DM_SPI=y
 CONFIG_ATMEL_SPI=y
-- 
2.11.0