Hi Frank,
On 4 March 2014 01:43, Frank Ihle frank.ihle@hs-offenburg.de wrote:
Hi everyone,
I searched the Internet but the help I found didn't work. I hope someone here may know how to fix it, here's the situation:
I have this ARM9 SAM9G25 which is accessed by its ttyS0. I want to disable all of the output, that was made during the U-Boot (v. 2010.06) boot, to decrease the CPU's load. Therefore there is the
setenv silent 1
parameter, which i put into the BOOTCMD string like:
#define CONFIG_BOOTCOMMAND " setenv silent 1;" \
"bootm "
The check is done in console_init_f(), the 'f' meaning before relocation, and thus before the environment is loaded and much before the boot command is run. You need to put "silent=1" into your built-in environment in the board config file.
See also serial_s5p.c which uses the device tree to make the console silent based on a device tree setting (i.e. not compiled into U-Boot). However, I doubt your board is using device tree.
and there is (as mentioned in the Readme.silent http://git.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=blob;f=doc/README.silen... ) the #define CONFIG_SILENT_CONSOLE #define CONFIG_SYS_DEVICE_NULLDEV #define CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
Maybe you need CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC?
command, neither one is working (the lines printed out are still the same and the boot time didn't change). Whereas the setenv varify n is working, just to give an example.
Does somebody see the error ?
BTW (I'm not sure if this is related to this) in the referenced link there is the information, that u-boot sets the kernel command line to "console=" so that in the end there will be no output for the kernel too, but that didn't happen and it doesn't even happen if i force to boot Linux with "console=" in the default Linux command line string
Do you see that in the Linux command line on boot?
If you have silent_linux=yes in U-Boot, then it will make Linux silent. See fixup_silent_linux() for the full details.
Regards, Simon
Thanks for your help. Kind Regards, Frank
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