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authorFelipe Balbi <balbi@ti.com>2014-05-01 02:45:10 +0400
committerFelipe Balbi <balbi@ti.com>2014-09-05 18:55:51 +0400
commit2c4cbe6e5a9c71408b496e00a78ea9284e98af16 (patch)
treec90423ae169751bf43925c9a37734762199ec803 /drivers/usb/dwc3/trace.c
parent3ece0ec474bf3cea9eefa7f92e3d4b6c3f9f71fd (diff)
downloadlinux-2c4cbe6e5a9c71408b496e00a78ea9284e98af16.tar.xz
usb: dwc3: add tracepoints to aid debugging
When we're debugging hard-to-reproduce and time-sensitive use cases, printk() poses too much overhead. That's when the kernel's tracing infrastructure comes into play. This patch implements a few initial tracepoints for the dwc3 driver. More traces can be added as necessary in order to ease the task of debugging dwc3. Reviewed-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3/trace.c')
-rw-r--r--drivers/usb/dwc3/trace.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/trace.c b/drivers/usb/dwc3/trace.c
new file mode 100644
index 000000000000..6cd166412ad0
--- /dev/null
+++ b/drivers/usb/dwc3/trace.c
@@ -0,0 +1,19 @@
+/**
+ * trace.c - DesignWare USB3 DRD Controller Trace Support
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Felipe Balbi <balbi@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 "trace.h"