jtag/gw16012 usage/help updates

Use standard BNF.  Improve/correct helptext for its "parport_port"
command.  Function address is just its name.

diff --git a/src/jtag/drivers/gw16012.c b/src/jtag/drivers/gw16012.c
index 38e5dd725533b72957472971f45b70490453f0d1..0e9f3fe2ba821c544ad6f180d6f55519a3c87bd8 100644 (file)
--- a/src/jtag/drivers/gw16012.c
+++ b/src/jtag/drivers/gw16012.c
@@ -565,10 +565,12 @@ COMMAND_HANDLER(gw16012_handle_parport_port_command)
 static const struct command_registration gw16012_command_handlers[] = {
        {
                .name = "parport_port",
-               .handler = &gw16012_handle_parport_port_command,
+               .handler = gw16012_handle_parport_port_command,
                .mode = COMMAND_CONFIG,
-               .help = "configure the parallel port to use",
-               .usage = "<port_num>",
+               .help = "Display the address of the I/O port (e.g. 0x378) "
+                       "or the number of the '/dev/parport' device used.  "
+                       "If a parameter is provided, first change that port.",
+               .usage = "[port_number]",
        },
        COMMAND_REGISTRATION_DONE
 };