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3 Commits

Author SHA1 Message Date
Baolin Wang
8ba0dbfd07 iio: adc: sc27xx: Add ADC scale calibration 
This patch adds support to read calibration values from the eFuse
controller to calibrate the ADC channel scales, which can make ADC
sample data more accurate.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2018-09-02 09:52:55 +01:00
Baolin Wang
fd2f53ebf9 iio: adc: sc27xx: Add raw data support 
The headset device will use channel 20 of ADC controller to detect events,
but it needs the raw ADC data to do conversion according to its own formula.

Thus we should configure the channel mask separately and configure channel
20 as IIO_CHAN_INFO_RAW, as well as adding raw data read support.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2018-09-02 09:48:25 +01:00
Freeman Liu
5df362a6cf iio: adc: Add Spreadtrum SC27XX PMICs ADC support 
The Spreadtrum SC27XX PMICs ADC controller contains 32 channels,
which is used to sample voltages with 12 bits conversion.

[Baolin Wang did lots of improvements]

Signed-off-by: Freeman Liu <freeman.liu@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2018-06-30 18:59:40 +01:00