path: root/commands/mm.c
diff options
authorHolger Schurig <>2014-05-13 10:28:42 +0200
committerSascha Hauer <>2014-05-14 10:03:43 +0200
commitf1f532084a6e9ee8225f047353999b459455df7e (patch)
treef2b8b1f25c5c630209c6970e3a7ce57a3d55d367 /commands/mm.c
parentab23d0bb3f66cfb7a97a8aa6b8007687ed7a6925 (diff)
commands: harmonize in-barebox documentation
This patch does probably too much, but it's hard (and very cumbersome/time consuming) to break it out. What is does is this: * each command has one short description, e.g. "list MUX configuration" * made sure the short descriptions start lowercase * each command has one usage. That string contains just the options, e.g. "[-npn]". It's not part of the long help text. * that is, it doesn't say "[OPTIONS]" anymore, every usable option is listed by character in this (short) option string (the long description is in the long help text, as before) * help texts have been reworked, to make them - sometimes smaller - sometimes describe the options better - more often present themselves in a nicer format * all long help texts are now created with BUSYBOX_CMD_HELP_ macros, no more 'static const __maybe_unused char cmd_foobar_help[]' * made sure the long help texts starts uppercase * because cmdtp->name and cmdtp->opts together provide the new usage, all "Usage: foobar" texts have been removed from the long help texts * BUSYBOX_CMD_HELP_TEXT() provides the trailing newline by itself, this is nicer in the source code * BUSYBOX_CMD_HELP_OPT() provides the trailing newline by itself * made sure no line gets longer than 77 characters * delibertely renamed cmdtp->usage, so that we can get compile-time errors (e.g. in out-of-tree modules that use register_command() * the 'help' command can now always emit the usage, even without compiled long help texts * 'help -v' gives a list of commands with their short description, this is similar like the old "help" command before my patchset * 'help -a' gives out help of all commands Signed-off-by: Holger Schurig <> Signed-off-by: Sascha Hauer <>
Diffstat (limited to 'commands/mm.c')
1 files changed, 12 insertions, 7 deletions
diff --git a/commands/mm.c b/commands/mm.c
index b4565b9..ff2e746 100644
--- a/commands/mm.c
+++ b/commands/mm.c
@@ -103,16 +103,21 @@ out_write:
return 1;
-static const __maybe_unused char cmd_mm_help[] =
-"Usage: mm [OPTIONS] <adr> <val> <mask>\n"
-"set/clear bits specified with <mask> in <adr> to <value>\n"
-" -b, -w, -l use byte, halfword, or word accesses\n"
-" -d <file> write file (default /dev/mem)\n";
+BAREBOX_CMD_HELP_TEXT("Set/clear bits specified with MASK in ADDR to VALUE")
+BAREBOX_CMD_HELP_OPT ("-b", "byte access")
+BAREBOX_CMD_HELP_OPT ("-w", "word access (16 bit)")
+BAREBOX_CMD_HELP_OPT ("-l", "long access (32 bit)")
+BAREBOX_CMD_HELP_OPT ("-d FILE", "write file (default /dev/mem)")
.cmd = do_mem_mm,
- .usage = "memory modify write with mask",
+ BAREBOX_CMD_DESC("memory modify with mask")