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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2017-12-19 10:00:12 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-12-19 10:56:24 +0100
commit297a344d5238c049fdc234c34dd7bb0d83f01271 (patch)
treeb38944b4c7caa25b132bd4f7f9325202b28717fb /drivers/siox
parentgenwqe: Remove unused parameter in some functions (diff)
downloadlinux-dev-297a344d5238c049fdc234c34dd7bb0d83f01271.tar.xz
linux-dev-297a344d5238c049fdc234c34dd7bb0d83f01271.zip
siox: add support for tracing
Implement tracing for SIOX. There are events for the data that is written to the bus and for data being read from it. Acked-by: Gavin Schenk <g.schenk@eckelmann.de> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/siox')
-rw-r--r--drivers/siox/siox-core.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
index 16585c1b2b9e..fdfcdea25867 100644
--- a/drivers/siox/siox-core.c
+++ b/drivers/siox/siox-core.c
@@ -33,6 +33,9 @@
*/
#define SIOX_STATUS_TYPE 0xf0
+#define CREATE_TRACE_POINTS
+#include <trace/events/siox.h>
+
static bool siox_is_registered;
static void siox_master_lock(struct siox_master *smaster)
@@ -126,6 +129,7 @@ static void siox_poll(struct siox_master *smaster)
{
struct siox_device *sdevice;
size_t i = smaster->setbuf_len;
+ unsigned int devno = 0;
int unsync_error = 0;
smaster->last_poll = jiffies;
@@ -172,6 +176,10 @@ static void siox_poll(struct siox_master *smaster)
sdevice->status_written &= ~SIOX_STATUS_WDG;
smaster->buf[i] = sdevice->status_written;
+
+ trace_siox_set_data(smaster, sdevice, devno, i);
+
+ devno++;
}
smaster->pushpull(smaster, smaster->setbuf_len, smaster->buf,
@@ -181,6 +189,7 @@ static void siox_poll(struct siox_master *smaster)
unsync_error = 0;
/* interpret data pulled in from devices in buf[setbuf_len..] */
+ devno = 0;
i = smaster->setbuf_len;
list_for_each_entry(sdevice, &smaster->devices, node) {
struct siox_driver *sdriver =
@@ -255,10 +264,13 @@ static void siox_poll(struct siox_master *smaster)
sdevice->status_written_lastcycle = sdevice->status_written;
sdevice->connected = connected;
+ trace_siox_get_data(smaster, sdevice, devno, status_clean, i);
+
/* only give data read to driver if the device is connected */
if (sdriver && connected)
sdriver->get_data(sdevice, &smaster->buf[i]);
+ devno++;
i += sdevice->outbytes;
}
}