hwclock: support /dev/rtc0 etc

1 files changed, 6 insertions, 3 deletions

diff --git a/include/usage.h b/include/usage.h
index a98d52e24..d8faa4f12 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1286,15 +1286,18 @@
        "        -d STRING       URL decode STRING"
 
 #define hwclock_trivial_usage \
-       "[-r|--show] [-s|--hctosys] [-w|--systohc] [-l|--localtime] [-u|--utc]"
+       "[-r|--show] [-s|--hctosys] [-w|--systohc]" \
+       " [-l|--localtime] [-u|--utc]" \
+       " [-f FILE]"
 #define hwclock_full_usage \
-       "Query and set the hardware clock (RTC)" \
+       "Query and set a hardware clock (RTC)" \
        "\n\nOptions:\n" \
        "        -r      Read hardware clock and print result\n" \
        "        -s      Set the system time from the hardware clock\n" \
        "        -w      Set the hardware clock to the current system time\n" \
        "        -u      The hardware clock is kept in coordinated universal time\n" \
-       "        -l      The hardware clock is kept in local time"
+       "        -l      The hardware clock is kept in local time\n" \
+       "        -f FILE Use the specified clock (e.g. /dev/rtc2)"
 
 #define id_trivial_usage \
        "[OPTIONS]... [USERNAME]"