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* iio: envelope-detector: switch to SPDX license identifierPeter Rosin2018-08-201-4/+1
| | | | | | | Drop the boilerplate license text. Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
* iio:adc: drop assign iio_info.driver_module and iio_trigger_ops.ownerJonathan Cameron2017-08-221-1/+0
| | | | | | | | | 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>
* iio: envelope-detector: ADC driver based on a DAC and a comparatorPeter Rosin2016-11-131-0/+422
The DAC is used to find the peak level of an alternating voltage input signal by a binary search using the output of a comparator wired to an interrupt pin. Like so: _ | \ input +------>-------|+ \ | \ .-------. | }---. | | | / | | dac|-->--|- / | | | |_/ | | | | | | | | irq|------<-------' | | '-------' Signed-off-by: Peter Rosin <peda@axentia.se> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>