parport: fix parport_toggling_time regression

If parport_toggling_time is called before the adapter speed has been
configured then the call fails. Probably not the best fix, but does at least
enable parport_toggling_time to be used again.

This regression was added in commit 740b9e25b410c164e661d0334a9ea4168406726b

Change-Id: I90300916d6bda5ef053c557e5ac136c4f002bdd1
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/1309
Tested-by: jenkins

diff --git a/src/jtag/drivers/parport.c b/src/jtag/drivers/parport.c
index 793b28f3b8361857732c8719acd1bf531d9d3c83..7dd842e0fcfe1fbdce578eeb64292281116593db 100644 (file)
--- a/src/jtag/drivers/parport.c
+++ b/src/jtag/drivers/parport.c
@@ -452,8 +452,13 @@ COMMAND_HANDLER(parport_handle_parport_toggling_time_command)
 
                parport_toggling_time_ns = ns;
                retval = jtag_get_speed(&wait_states);
-               if (retval != ERROR_OK)
-                       return retval;
+               if (retval != ERROR_OK) {
+                       /* if jtag_get_speed fails then the clock_mode
+                        * has not been configured, this happens if parport_toggling_time is
+                        * called before the adapter speed is set */
+                       LOG_INFO("no parport speed set - defaulting to zero wait states");
+                       wait_states = 0;
+               }
        }
 
        command_print(CMD_CTX, "parport toggling time = %" PRIu32 " ns",