From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Wed, 26 May 2021 19:56:55 +0000 (+0300)
Subject: spi: Enable tracing of the SPI setup CS selection
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5cb4e1f33e5eeadbce3814282e010d4dd31816af;p=linux.git

spi: Enable tracing of the SPI setup CS selection

It is helpful to see what state of CS signal was during one
or another SPI operation. All the same for SPI setup.

Enable tracing of the SPI setup and CS selection.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Message-Id: <20210526195655.75691-1-andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 956dce3aafcad..20932752a7ef8 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -804,6 +804,8 @@ static void spi_set_cs(struct spi_device *spi, bool enable, bool force)
 	    (spi->controller->last_cs_mode_high == (spi->mode & SPI_CS_HIGH)))
 		return;
 
+	trace_spi_set_cs(spi, activate);
+
 	spi->controller->last_cs_enable = enable;
 	spi->controller->last_cs_mode_high = spi->mode & SPI_CS_HIGH;
 
@@ -3441,6 +3443,8 @@ int spi_setup(struct spi_device *spi)
 		spi_set_thread_rt(spi->controller);
 	}
 
+	trace_spi_setup(spi, status);
+
 	dev_dbg(&spi->dev, "setup mode %lu, %s%s%s%s%u bits/w, %u Hz max --> %d\n",
 			spi->mode & SPI_MODE_X_MASK,
 			(spi->mode & SPI_CS_HIGH) ? "cs_high, " : "",
diff --git a/include/trace/events/spi.h b/include/trace/events/spi.h
index 0dd9171d2ad8e..c0d9844befd7a 100644
--- a/include/trace/events/spi.h
+++ b/include/trace/events/spi.h
@@ -42,6 +42,63 @@ DEFINE_EVENT(spi_controller, spi_controller_busy,
 
 );
 
+TRACE_EVENT(spi_setup,
+	TP_PROTO(struct spi_device *spi, int status),
+	TP_ARGS(spi, status),
+
+	TP_STRUCT__entry(
+		__field(int, bus_num)
+		__field(int, chip_select)
+		__field(unsigned long, mode)
+		__field(unsigned int, bits_per_word)
+		__field(unsigned int, max_speed_hz)
+		__field(int, status)
+	),
+
+	TP_fast_assign(
+		__entry->bus_num = spi->controller->bus_num;
+		__entry->chip_select = spi->chip_select;
+		__entry->mode = spi->mode;
+		__entry->bits_per_word = spi->bits_per_word;
+		__entry->max_speed_hz = spi->max_speed_hz;
+		__entry->status = status;
+	),
+
+	TP_printk("spi%d.%d setup mode %lu, %s%s%s%s%u bits/w, %u Hz max --> %d",
+		  __entry->bus_num, __entry->chip_select,
+		  (__entry->mode & SPI_MODE_X_MASK),
+		  (__entry->mode & SPI_CS_HIGH) ? "cs_high, " : "",
+		  (__entry->mode & SPI_LSB_FIRST) ? "lsb, " : "",
+		  (__entry->mode & SPI_3WIRE) ? "3wire, " : "",
+		  (__entry->mode & SPI_LOOP) ? "loopback, " : "",
+		  __entry->bits_per_word, __entry->max_speed_hz,
+		  __entry->status)
+);
+
+TRACE_EVENT(spi_set_cs,
+	TP_PROTO(struct spi_device *spi, bool enable),
+	TP_ARGS(spi, enable),
+
+	TP_STRUCT__entry(
+		__field(int, bus_num)
+		__field(int, chip_select)
+		__field(unsigned long, mode)
+		__field(bool, enable)
+	),
+
+	TP_fast_assign(
+		__entry->bus_num = spi->controller->bus_num;
+		__entry->chip_select = spi->chip_select;
+		__entry->mode = spi->mode;
+		__entry->enable = enable;
+	),
+
+	TP_printk("spi%d.%d %s%s",
+		  __entry->bus_num, __entry->chip_select,
+		  __entry->enable ? "activate" : "deactivate",
+		  (__entry->mode & SPI_CS_HIGH) ? ", cs_high" : "")
+);
+
 DECLARE_EVENT_CLASS(spi_message,
 
 	TP_PROTO(struct spi_message *msg),