UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Andy Shevchenko 2021-05-26 22:56:55 +03:00 committed by Mark Brown
parent ab053f48f9
commit 5cb4e1f33e
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 61 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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),