diff options
author | Bin Liu <b-liu@ti.com> | 2016-06-30 12:12:21 -0500 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-17 08:23:57 +0900 |
commit | f89252ad19a1a93095bdee58a4d857023f069280 (patch) | |
tree | 33b73ccbea6380093c8b0983fa17c87f9dcdafcc /drivers/usb/musb/musb_trace.c | |
parent | ca2b6faeb96d6d71ebc0627d6679f7b6667cfb00 (diff) |
usb: musb: add tracepoints support for debugging
To avoid printk() overhead while debugging, this patch implements the
foundation of tracepoints logging for musb driver to make debug
easier.
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb/musb_trace.c')
-rw-r--r-- | drivers/usb/musb/musb_trace.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_trace.c b/drivers/usb/musb/musb_trace.c new file mode 100644 index 000000000000..70973d901a21 --- /dev/null +++ b/drivers/usb/musb/musb_trace.c @@ -0,0 +1,33 @@ +/* + * musb_trace.c - MUSB Controller Trace Support + * + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com + * + * Author: Bin Liu <b-liu@ti.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define CREATE_TRACE_POINTS +#include "musb_trace.h" + +void musb_dbg(struct musb *musb, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + + trace_musb_log(musb, &vaf); + + va_end(args); +} |