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spi: Enable tracing of the SPI setup CS selection

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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>
This commit is contained in:
Andy Shevchenko
2021-05-26 22:56:55 +03:00
committed by Mark Brown
parent ab053f48f9
commit 5cb4e1f33e
2 changed files with 61 additions and 0 deletions
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4
drivers/spi/spi.c
View File

@@ -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, " : "",

57
include/trace/events/spi.h
View File

@@ -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),