3 Commits

Author	SHA1	Message	Date
Andreas Klinger	bb208037ae	srf04.c: add maxbotix ultrasonic sensors ... add Maxbotix LV ultrasonic sensor types mb1000, mb1010, mb1020, mb1030 and mb1040 add a configuration struct with the different trigger pulse lengths Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>	2019-04-14 14:05:31 +01:00
Jonathan Cameron	a62e256b14	iio:proximity: drop assign iio_info.driver_module and iio_trigger_ops.owner ... The equivalent of both of these are now done via macro magic when the relevant register calls are made. The actual structure elements will shortly go away. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>	2017-08-22 22:14:51 +01:00
Andreas Klinger	feda284004	iio: distance: add devantech us ranger srf04 ... This patch adds support for the ultrasonic ranger srf04 of devantech. This device is measuring the distance of objects in a range between 1 cm and 3 meters and a theoretical resolution of 3 mm. There are two GPIOs used: - trigger: set as output to the device when the measurement should start - echo: set by the device when the ultrasonic wave is sent out and reset when the echo is recognized; this needs to be an interrupt input The time between setting and resetting the echo pin is the time the waveform needed for one round trip. This time is recorded in the interrupt handler. The distance is calculated in the read function by using the ultrasonic speed at 20 degrees celsius which is about 343 m/s. Signed-off-by: Andreas Klinger <ak@it-klinger.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>	2017-02-04 12:19:20 +00:00