[PATCH] commands: sleep: add msleep support

[Sascha Hauer <s.hauer@pengutronix.de>]

Sometimes it's useful to delay execution for less than a second. Add
support for msleep command which is implemented as an alias to the sleep
command.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 commands/sleep.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/commands/sleep.c b/commands/sleep.c
index b462ef4413..641dbb230a 100644
--- a/commands/sleep.c
+++ b/commands/sleep.c
@@ -10,16 +10,20 @@
 
 static int do_sleep(int argc, char *argv[])
 {
-	uint64_t start;
-	ulong delay;
+	uint64_t start, delay;
 
 	if (argc != 2)
 		return COMMAND_ERROR_USAGE;
 
 	delay = simple_strtoul(argv[1], NULL, 10);
 
+	if (!strcmp(argv[0], "msleep"))
+		delay *= MSECOND;
+	else
+		delay *= SECOND;
+
 	start = get_time_ns();
-	while (!is_timeout(start, delay * SECOND)) {
+	while (!is_timeout(start, delay)) {
 		if (ctrlc())
 			return 1;
 	}
@@ -27,9 +31,12 @@ static int do_sleep(int argc, char *argv[])
 	return 0;
 }
 
+static const char * const sleep_aliases[] = { "msleep", NULL};
+
 BAREBOX_CMD_START(sleep)
 	.cmd		= do_sleep,
-	BAREBOX_CMD_DESC("delay execution for n seconds")
+	.aliases	= sleep_aliases,
+	BAREBOX_CMD_DESC("delay execution for n seconds or n mseconds if invoked as msleep")
 	BAREBOX_CMD_OPTS("SECONDS")
 	BAREBOX_CMD_GROUP(CMD_GRP_SCRIPT)
 	BAREBOX_CMD_COMPLETE(command_var_complete)
-- 
2.39.5