introduce runtime loglevel

With this the verbosity of barebox can be controlled during runtime
using the 'loglevel' globalvar.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 44 insertions, 1 deletions

diff --git a/common/Kconfig b/common/Kconfig
index 5d922847e8..87abaf0b27 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -607,7 +607,7 @@ endmenu
 menu "Debugging"
 
 config COMPILE_LOGLEVEL
-	int "loglevel"
+	int "compile loglevel"
 	default 6
 	help
 	  This defines the maximum loglevel compiled into the binary. Less important
@@ -622,6 +622,22 @@ config COMPILE_LOGLEVEL
 	  6    informational (info)
 	  7    debug-level messages (debug)
 
+config DEFAULT_LOGLEVEL
+	int "default loglevel"
+	default 7
+	help
+	  This defines the default runtime loglevel. It can be changed using the
+	  global.loglevel variable. Available logelevels are:
+
+	  0    system is unusable (emerg)
+	  1    action must be taken immediately (alert)
+	  2    critical conditions (crit)
+	  3    error conditions (err)
+	  4    warning conditions (warn)
+	  5    normal but significant condition (notice)
+	  6    informational (info)
+	  7    debug-level messages (debug)
+
 config DEBUG_INFO
 	bool
 	prompt "enable debug symbols"
diff --git a/common/console_common.c b/common/console_common.c
index d1b823ef8a..18b76766d6 100644
--- a/common/console_common.c
+++ b/common/console_common.c
@@ -57,6 +57,33 @@ void console_allow_input(bool val)
 	console_input_allow = val;
 }
 
+int barebox_loglevel = CONFIG_DEFAULT_LOGLEVEL;
+
+int pr_print(int level, const char *fmt, ...)
+{
+	va_list args;
+	uint i;
+	char printbuffer[CFG_PBSIZE];
+
+	if (level > barebox_loglevel)
+		return 0;
+
+	va_start(args, fmt);
+	i = vsprintf(printbuffer, fmt, args);
+	va_end(args);
+
+	/* Print the string */
+	puts(printbuffer);
+
+	return i;
+}
+
+static int loglevel_init(void)
+{
+	return globalvar_add_simple_int("loglevel", &barebox_loglevel, "%d");
+}
+device_initcall(loglevel_init);
+
 int printf(const char *fmt, ...)
 {
 	va_list args;