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path: root/drivers/spi/spi-slave-time.c
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2017-05-26spi: slave: Add SPI slave handler reporting uptime at previous messageGeert Uytterhoeven
Add an example SPI slave handler responding with the uptime at the time of reception of the last SPI message. This can be used by an external microcontroller as a dead man's switch. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>