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| author | Martin Sperl <kernel@martin.sperl.org> | 2015-06-22 13:02:04 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-09-19 11:12:56 -0700 |
| commit | 6b7bc0618ff1a333d2265131b124e966335d5dee (patch) | |
| tree | dcbbfd8154c62a3bb02c23d071f57cba08294371 /include/linux/spi | |
| parent | 6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff) | |
| download | lwn-6b7bc0618ff1a333d2265131b124e966335d5dee.tar.gz lwn-6b7bc0618ff1a333d2265131b124e966335d5dee.zip | |
spi: add transfer histogram statistics via sysfs
report transfer sizes as a histogram via the following files:
/sys/class/spi_master/spi*/statistics/transfer_bytes_histo_*
/sys/class/spi_master/spi*/spi*.*/statistics/transfer_bytes_histo_*
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/spi')
| -rw-r--r-- | include/linux/spi/spi.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 269e8afd3e2a..5b6fdc48eba7 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -51,6 +51,8 @@ extern struct bus_type spi_bus_type; * @bytes_tx: number of bytes sent to device * @bytes_rx: number of bytes received from device * + * @transfer_bytes_histo: + * transfer bytes histogramm */ struct spi_statistics { spinlock_t lock; /* lock for the whole structure */ @@ -68,6 +70,8 @@ struct spi_statistics { unsigned long long bytes_rx; unsigned long long bytes_tx; +#define SPI_STATISTICS_HISTO_SIZE 17 + unsigned long transfer_bytes_histo[SPI_STATISTICS_HISTO_SIZE]; }; void spi_statistics_add_transfer_stats(struct spi_statistics *stats, |