iio: adc: hx711: optimize performance in read cycle

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Set gain in hx711_reset() to its default value after a reset cycle. This
omits one precautionary read cycle, because the read is performed in
hx711_set_gain_for_channel() anyway if gain has changed.

Check for DOUT low and if its high wait some time if it goes down
instead of doing a blind reset cycle when DOUT is not down.

This is a performance optimization which allows to query the sensor with
a higher frequency.

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Andreas Klinger 2019-09-09 14:37:48 +02:00 • committed by Jonathan Cameron

parent 1cd92d42db

commit 68d8ab3cf1

1 changed files with 5 additions and 17 deletions

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22

drivers/iio/adc/hx711.c

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