Analog to Digital Converter

The AR755x, AR8652, and WP8548 support 2 ADC. The dedicated string in le_adc_ReadValue() API are "EXT_ADC1" and "EXT_ADC2".

The AR759x supports 4 ADC. The dedicated string in le_adc_ReadValue() API are "EXT_ADC1", "EXT_ADC2", "EXT_ADC3" and "EXT_ADC4".

For all platforms, channels are externally available for general use, and by default use 1.8V reference and return results in mV.