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.h | |
| parent | Merge tag 'phy-for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy into usb-testing (diff) | |
| download | linux-dev-f89252ad19a1a93095bdee58a4d857023f069280.tar.xz linux-dev-f89252ad19a1a93095bdee58a4d857023f069280.zip | |
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.h')
| -rw-r--r-- | drivers/usb/musb/musb_trace.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_trace.h b/drivers/usb/musb/musb_trace.h new file mode 100644 index 000000000000..c6c593ec3aa7 --- /dev/null +++ b/drivers/usb/musb/musb_trace.h @@ -0,0 +1,54 @@ +/* + * musb_trace.h - 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. + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM musb + +#if !defined(__MUSB_TRACE_H) || defined(TRACE_HEADER_MULTI_READ) +#define __MUSB_TRACE_H + +#include <linux/types.h> +#include <linux/tracepoint.h> +#include "musb_core.h" + +#define MUSB_MSG_MAX 500 + +TRACE_EVENT(musb_log, + TP_PROTO(struct musb *musb, struct va_format *vaf), + TP_ARGS(musb, vaf), + TP_STRUCT__entry( + __string(name, dev_name(musb->controller)) + __dynamic_array(char, msg, MUSB_MSG_MAX) + ), + TP_fast_assign( + __assign_str(name, dev_name(musb->controller)); + vsnprintf(__get_str(msg), MUSB_MSG_MAX, vaf->fmt, *vaf->va); + ), + TP_printk("%s: %s", __get_str(name), __get_str(msg)) +); + +#endif /* __MUSB_TRACE_H */ + +/* this part has to be here */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . + +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE musb_trace + +#include <trace/define_trace.h> |