From 8d51aacd8cd99adb9e58933951602c4f43e90aa1 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 16 Jul 2013 20:10:00 -0700 Subject: 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 --- README | 6 ++++++ common/cmd_bootm.c | 14 ++++++++++++-- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/README b/README index 391880765a..96cc4668e0 100644 --- a/README +++ b/README @@ -4627,6 +4627,12 @@ List of environment variables (most likely not complete): npe_ucode - set load address for the NPE microcode + silent_linux - If set then linux will be told to boot silently, by + changing the console to be empty. If "yes" it will be + made silent. If "no" it will not be made silent. If + unset, then it will be made silent if the U-Boot console + is silent. + tftpsrcport - If this is set, the value is used for TFTP's UDP source port. diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c index 046e22ff48..31ec0f4bbc 100644 --- a/common/cmd_bootm.c +++ b/common/cmd_bootm.c @@ -1384,9 +1384,19 @@ static void fixup_silent_linux(void) 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); -- cgit v1.2.1