RFC: bootm: Add silent_linux environment variable
At present the console for linux is silent if the U-Boot console is silent,
unless CONFIG_SILENT_U_BOOT_ONLY is set. I wonder if a better way would be
to have an environment variable to control this? Then we can control the
verbosity from scripts, and set the variable to 'no' for those boards that
want Linux to boot with console output.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 046e22f..31ec0f4 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -1384,9 +1384,19 @@
char *buf;
const char *env_val;
char *cmdline = getenv("bootargs");
+ int want_silent;
- /* Only fix cmdline when requested */
- if (!(gd->flags & GD_FLG_SILENT))
+ /*
+ * Only fix cmdline when requested. The environment variable can be:
+ *
+ * no - we never fixup
+ * yes - we always fixup
+ * unset - we rely on the console silent flag
+ */
+ want_silent = getenv_yesno("silent_linux");
+ if (want_silent == 0)
+ return;
+ else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
return;
debug("before silent fix-up: %s\n", cmdline);