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siox: add support for tracing

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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>
This commit is contained in:
Uwe Kleine-König
2017-12-19 10:00:12 +01:00
committed by Greg Kroah-Hartman
parent 658a494a5b
commit 297a344d52
2 changed files with 78 additions and 0 deletions
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drivers/siox/siox-core.c
+12
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@@ -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;
}
}