[U-Boot] [PATCH v3 08/14] log: Add a console driver

[Lukasz Majewski]

On Mon, 20 Nov 2017 15:33:29 -0700
Simon Glass <sjg at chromium.org> wrote:

> It is useful to display log messages on the console. Add a simple
> driver to handle this.
> 
> Note that this driver outputs to the console, which may be serial or
> video. It does not specifically select serial output.
> 

Reviewed-by: Lukasz Majewski <lukma at denx.de>

> Signed-off-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> ---
> 
> Changes in v3: None
> Changes in v2:
> - Update commit message to explain that this is not just for serial
> output
> 
>  common/Kconfig       | 20 ++++++++++++++++++++
>  common/Makefile      |  1 +
>  common/log_console.c | 23 +++++++++++++++++++++++
>  3 files changed, 44 insertions(+)
>  create mode 100644 common/log_console.c
> 
> diff --git a/common/Kconfig b/common/Kconfig
> index 9747443feb2..1b157e47c3d 100644
> --- a/common/Kconfig
> +++ b/common/Kconfig
> @@ -474,6 +474,26 @@ config SPL_LOG_MAX_LEVEL
>  	    6 - detail
>  	    7 - debug
>  
> +config LOG_CONSOLE
> +	bool "Allow log output to the console"
> +	depends on LOG
> +	default y
> +	help
> +	  Enables a log driver which writes log records to the
> console.
> +	  Generally the console is the serial port or LCD display.
> Only the
> +	  log message is shown - other details like level, category,
> file and
> +	  line number are omitted.
> +
> +config LOG_SPL_CONSOLE
> +	bool "Allow log output to the console in SPL"
> +	depends on LOG_SPL
> +	default y
> +	help
> +	  Enables a log driver which writes log records to the
> console.
> +	  Generally the console is the serial port or LCD display.
> Only the
> +	  log message is shown - other details like level, category,
> file and
> +	  line number are omitted.
> +
>  endmenu
>  
>  config DEFAULT_FDT_FILE
> diff --git a/common/Makefile b/common/Makefile
> index f4b632761fa..14166209fe4 100644
> --- a/common/Makefile
> +++ b/common/Makefile
> @@ -129,5 +129,6 @@ obj-$(CONFIG_FSL_DDR_INTERACTIVE) += cli_simple.o
> cli_readline.o obj-$(CONFIG_CMD_DFU) += dfu.o
>  obj-y += command.o
>  obj-$(CONFIG_$(SPL_)LOG) += log.o
> +obj-$(CONFIG_$(SPL_)LOG_CONSOLE) += log_console.o
>  obj-y += s_record.o
>  obj-y += xyzModem.o
> diff --git a/common/log_console.c b/common/log_console.c
> new file mode 100644
> index 00000000000..5af73bd8be4
> --- /dev/null
> +++ b/common/log_console.c
> @@ -0,0 +1,23 @@
> +/*
> + * Logging support
> + *
> + * Copyright (c) 2017 Google, Inc
> + * Written by Simon Glass <sjg at chromium.org>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <log.h>
> +
> +static int log_console_emit(struct log_device *ldev, struct log_rec
> *rec) +{
> +	puts(rec->msg);
> +
> +	return 0;
> +}
> +
> +LOG_DRIVER(console) = {
> +	.name	= "console",
> +	.emit	= log_console_emit,
> +};



Best regards,

Lukasz Majewski

--

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