spi: add transfer histogram statistics via sysfs

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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>

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Martin Sperl 2015-06-22 13:02:04 +00:00 • committed by Mark Brown

parent 6ff33f3902

commit 6b7bc0618f

2 changed files with 65 additions and 0 deletions

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61

drivers/spi/spi.c

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4

include/linux/spi/spi.h

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