On Mon, Oct 19, 2015 at 9:51 AM, Simon Glass <s...@chromium.org> wrote:
> It is useful to see a message from the debug UART early during boot so that
> you know things are working. Add an option to enable this. The message will
> be displayed as soon as debug_uart_init() is called.
>
> Signed-off-by: Simon Glass <s...@chromium.org>
> ---
>
> Changes in v2: None
>
> drivers/serial/Kconfig | 10 ++++++++++
> include/debug_uart.h | 7 +++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
> index 39f6500..ac5920a 100644
> --- a/drivers/serial/Kconfig
> +++ b/drivers/serial/Kconfig
> @@ -120,6 +120,16 @@ config DEBUG_UART_BOARD_INIT
> here that is needed to set up the UART ready for use, such as set
> pin multiplexing or enable clocks.
>
> +config DEBUG_UART_ANNOUNCE
> + bool "Show a message when the debug UART starts up"
> + depends on DEBUG_UART
> + help
> + Enable this option to show a message when the debug UART is ready
> + for use. You will see a message like "<debug_uart> " as soon as
> + U-Boot has the UART ready for use (i.e. your code calls
> + debug_uart_init()). This can be useful just as a check that
> + everything is working.
> +
> config ROCKCHIP_SERIAL
> bool "Rockchip on-chip UART support"
> depends on ARCH_ROCKCHIP && DM_SERIAL
> diff --git a/include/debug_uart.h b/include/debug_uart.h
> index a6b7ce8..5d5349b 100644
> --- a/include/debug_uart.h
> +++ b/include/debug_uart.h
> @@ -105,6 +105,12 @@ void printhex4(uint value);
> */
> void printhex8(uint value);
>
> +#ifdef CONFIG_DEBUG_UART_ANNOUNCE
> +#define _DEBUG_UART_ANNOUNCE printascii("<debug_uart> ");
> +#else
> +#define _DEBUG_UART_ANNOUNCE
> +#endif
> +
> /*
> * Now define some functions - this should be inserted into the serial driver
> */
> @@ -151,6 +157,7 @@ void printhex8(uint value);
> { \
> board_debug_uart_init(); \
> _debug_uart_init(); \
> + _DEBUG_UART_ANNOUNCE \
> } \
>
> #endif
> --
Reviewed-by: Bin Meng <bmeng...@gmail.com>
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