From 32e0e7e08c32fbd61ddfb7e80ba96c13085f3d39 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Fri, 10 Aug 2012 17:36:00 +0100 Subject: staging:iio:ad7780: Use common Sigma Delta library Convert the ad7780 driver to make use of the new common code for devices from the Analog Devices Sigma Delta family. As a bonus the ad7780 driver gains support for buffered mode. Although this is a bit tricky. The ad7780 reports in the lower 4 unused bits of the data word the internal gain used. The driver will update the scale attribute value depending on the gain accordingly, but obviously this will only work if the gain does not change while sampling. This is not perfect, but since we store the raw value in the buffer an application which is aware of this can extract the gain factor from the buffer as well an apply it accordingly. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/staging/iio/adc/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/staging/iio/adc/Kconfig') diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig index 845fb6c70ca3..d0eb27be381c 100644 --- a/drivers/staging/iio/adc/Kconfig +++ b/drivers/staging/iio/adc/Kconfig @@ -99,6 +99,7 @@ config AD7780 tristate "Analog Devices AD7780 AD7781 ADC driver" depends on SPI depends on GPIOLIB + select AD_SIGMA_DELTA help Say yes here to build support for Analog Devices AD7780 and AD7781 SPI analog to digital converters (ADC). -- cgit v1.2.3