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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2017-12-19 10:00:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-19 10:56:24 +0100 |
| commit | 297a344d5238c049fdc234c34dd7bb0d83f01271 (patch) | |
| tree | b38944b4c7caa25b132bd4f7f9325202b28717fb /drivers/siox | |
| parent | 658a494a5b793ab19575f6825cd3f01ce662b0c6 (diff) | |
| download | lwn-297a344d5238c049fdc234c34dd7bb0d83f01271.tar.gz lwn-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.c | 12 |
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; } } |