Signed-off-by: Anatolij Gustschin <agust@denx.de>

Up to now only reading 'appreg' value was implemented in the
digsyMTC special 'mtc appreg' command. Extend the command to
support writing appreg value, too.

Signed-off-by: Werner Pfister <Pfister_Werner@intercontrol.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>

Lots of code use this construct:

	cmd_usage(cmdtp);
	return 1;

Change cmd_usage() let it return 1 - then we can replace all these
ocurrances by

	return cmd_usage(cmdtp);

This fixes a few places with incorrect return code handling, too.

Signed-off-by: Wolfgang Denk <wd@denx.de>

The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands.  Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".

This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:

int main (int argc, char **argv)
{
	while (--argc > 0 && **++argv == '-') {
/* ====> */	while (*++*argv) {
			switch (**argv) {
			case 'd':
				debug++;
				break;
			...
			default:
				usage ();
			}
		}
	}
	...
}

The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell.  With the modification, the compiler will prevent this with
an
	error: increment of read-only location '*argv'

N.B.: The code above can be trivially rewritten like this:

	while (--argc > 0 && **++argv == '-') {
		char *arg = *argv;
		while (*++arg) {
			switch (*arg) {
			...

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

While at it, remove initialization of variables which will be set
before usage in all cases.

Signed-off-by: Detlev Zundel <dzu@denx.de>

Add mtc state subcommand description to the
help of mtc command.

Remove some newlines in description of commands
for proper help formating.

Signed-off-by: Anatolij Gustschin <agust@denx.de>

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>

Signed-off-by: Wolfgang Denk <wd@denx.de>

New command allows to:
     o check FW version
     o set LED status
     o set digital output status
     o get digital input status

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>