Make it clear that if only 1 parameter is provided this is the duration.

The ISO symbol for hertz is Hz.

Fixes: c0c88533fffd ("Sound: Add command for audio playback") Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com --- cmd/sound.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/sound.c b/cmd/sound.c index f82f2aa670..20ac3f758e 100644 --- a/cmd/sound.c +++ b/cmd/sound.c @@ -86,5 +86,5 @@ U_BOOT_CMD( sound, 4, 1, do_sound, "sound sub-system", "init - initialise the sound driver\n" - "sound play [len] [freq] - play a sound for len ms at freq hz\n" + "sound play [len [freq]] - play a sound for len ms at freq Hz\n" );