[U-Boot] [PATCH v2 7/8] board: sama5d4ek: enable early debug UART

["Andreas Bießmann" <andreas@biessmann.de>]

On 2016-10-28 09:16, Wenyou Yang wrote:
> Enable early debug UART to debug problems when an ICE or other
> debug mechanism is not available.
> 
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>

Reviewed-by: Andreas Bie?mann <andreas@biessmann.org>

> ---
> 
> Changes in v2: None
> 
>  board/atmel/sama5d4ek/sama5d4ek.c     | 15 ++++++++++++++-
>  configs/sama5d4ek_mmc_defconfig       |  6 ++++++
>  configs/sama5d4ek_nandflash_defconfig |  6 ++++++
>  configs/sama5d4ek_spiflash_defconfig  |  6 ++++++
>  include/configs/sama5d4ek.h           |  2 ++
>  5 files changed, 34 insertions(+), 1 deletion(-)
> 
> diff --git a/board/atmel/sama5d4ek/sama5d4ek.c
> b/board/atmel/sama5d4ek/sama5d4ek.c
> index c5479e7..2c2036c 100644
> --- a/board/atmel/sama5d4ek/sama5d4ek.c
> +++ b/board/atmel/sama5d4ek/sama5d4ek.c
> @@ -17,6 +17,7 @@
>  #include <asm/arch/sama5d4.h>
>  #include <atmel_hlcdc.h>
>  #include <lcd.h>
> +#include <debug_uart.h>
>  #include <net.h>
>  #include <netdev.h>
>  #include <nand.h>
> @@ -192,12 +193,24 @@ static void sama5d4ek_serial3_hw_init(void)
>  	at91_periph_clk_enable(ATMEL_ID_USART3);
>  }
> 
> -int board_early_init_f(void)
> +#ifdef CONFIG_DEBUG_UART_BOARD_INIT
> +void board_debug_uart_init(void)
>  {
>  	sama5d4ek_serial3_hw_init();
> +}
> +#endif
> 
> +#ifdef CONFIG_BOARD_EARLY_INIT_F
> +int board_early_init_f(void)
> +{
> +#ifdef CONFIG_DEBUG_UART
> +	debug_uart_init();
> +#else
> +	sama5d4ek_serial3_hw_init();
> +#endif
>  	return 0;
>  }
> +#endif
> 
>  int board_init(void)
>  {
> diff --git a/configs/sama5d4ek_mmc_defconfig 
> b/configs/sama5d4ek_mmc_defconfig
> index fd49b58..76b7855 100644
> --- a/configs/sama5d4ek_mmc_defconfig
> +++ b/configs/sama5d4ek_mmc_defconfig
> @@ -48,6 +48,12 @@ CONFIG_SPI_FLASH_ATMEL=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=0xfc00c000
> +CONFIG_DEBUG_UART_CLOCK=0
> +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/sama5d4ek_nandflash_defconfig
> b/configs/sama5d4ek_nandflash_defconfig
> index 34f5234..1bef322 100644
> --- a/configs/sama5d4ek_nandflash_defconfig
> +++ b/configs/sama5d4ek_nandflash_defconfig
> @@ -46,6 +46,12 @@ CONFIG_SPI_FLASH_ATMEL=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=0xfc00c000
> +CONFIG_DEBUG_UART_CLOCK=0
> +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/sama5d4ek_spiflash_defconfig
> b/configs/sama5d4ek_spiflash_defconfig
> index c7f4655..bd7325e 100644
> --- a/configs/sama5d4ek_spiflash_defconfig
> +++ b/configs/sama5d4ek_spiflash_defconfig
> @@ -47,6 +47,12 @@ CONFIG_SPI_FLASH_ATMEL=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=0xfc00c000
> +CONFIG_DEBUG_UART_CLOCK=0
> +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/include/configs/sama5d4ek.h b/include/configs/sama5d4ek.h
> index b5b8e4c..964cb6b 100644
> --- a/include/configs/sama5d4ek.h
> +++ b/include/configs/sama5d4ek.h
> @@ -15,6 +15,8 @@
> 
>  #include "at91-sama5_common.h"
> 
> +#define CONFIG_BOARD_EARLY_INIT_F
> +
>  /* SDRAM */
>  #define CONFIG_NR_DRAM_BANKS		1
>  #define CONFIG_SYS_SDRAM_BASE           ATMEL_BASE_DDRCS