spi: bcm2835: add driver stats to debugfs

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To estimate efficiency add statistics on transfer types
(polling, interrupt and dma) used to debugfs.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>

Changelog:
  V1 -> V2: applied feedback by Stefan Wahren
            reorganized patchset
	    added extra rational, descriptions
	    fixed compile issue when CONFIG_DEBUG_FS is unset
Signed-off-by: Mark Brown <broonie@kernel.org>

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Martin Sperl 2019-04-23 20:15:13 +00:00 • committed by Mark Brown

parent ff245d90eb

commit 154f7da56f

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drivers/spi/spi-bcm2835.c

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