ad7793.h
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/*
* AD7792/AD7793 SPI ADC driver
*
* Copyright 2011 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#ifndef __LINUX_PLATFORM_DATA_AD7793_H__
#define __LINUX_PLATFORM_DATA_AD7793_H__
/**
* enum ad7793_clock_source - AD7793 clock source selection
* @AD7793_CLK_SRC_INT: Internal 64 kHz clock, not available at the CLK pin.
* @AD7793_CLK_SRC_INT_CO: Internal 64 kHz clock, available at the CLK pin.
* @AD7793_CLK_SRC_EXT: Use external clock.
* @AD7793_CLK_SRC_EXT_DIV2: Use external clock divided by 2.
*/
enum ad7793_clock_source {
AD7793_CLK_SRC_INT,
AD7793_CLK_SRC_INT_CO,
AD7793_CLK_SRC_EXT,
AD7793_CLK_SRC_EXT_DIV2,
};
/**
* enum ad7793_bias_voltage - AD7793 bias voltage selection
* @AD7793_BIAS_VOLTAGE_DISABLED: Bias voltage generator disabled
* @AD7793_BIAS_VOLTAGE_AIN1: Bias voltage connected to AIN1(-).
* @AD7793_BIAS_VOLTAGE_AIN2: Bias voltage connected to AIN2(-).
* @AD7793_BIAS_VOLTAGE_AIN3: Bias voltage connected to AIN3(-).
* Only valid for AD7795/AD7796.
*/
enum ad7793_bias_voltage {
AD7793_BIAS_VOLTAGE_DISABLED,
AD7793_BIAS_VOLTAGE_AIN1,
AD7793_BIAS_VOLTAGE_AIN2,
AD7793_BIAS_VOLTAGE_AIN3,
};
/**
* enum ad7793_refsel - AD7793 reference voltage selection
* @AD7793_REFSEL_REFIN1: External reference applied between REFIN1(+)
* and REFIN1(-).
* @AD7793_REFSEL_REFIN2: External reference applied between REFIN2(+) and
* and REFIN1(-). Only valid for AD7795/AD7796.
* @AD7793_REFSEL_INTERNAL: Internal 1.17 V reference.
*/
enum ad7793_refsel {
AD7793_REFSEL_REFIN1 = 0,
AD7793_REFSEL_REFIN2 = 1,
AD7793_REFSEL_INTERNAL = 2,
};
/**
* enum ad7793_current_source_direction - AD7793 excitation current direction
* @AD7793_IEXEC1_IOUT1_IEXEC2_IOUT2: Current source IEXC1 connected to pin
* IOUT1, current source IEXC2 connected to pin IOUT2.
* @AD7793_IEXEC1_IOUT2_IEXEC2_IOUT1: Current source IEXC2 connected to pin
* IOUT1, current source IEXC1 connected to pin IOUT2.
* @AD7793_IEXEC1_IEXEC2_IOUT1: Both current sources connected to pin IOUT1.
* Only valid when the current sources are set to 10 uA or 210 uA.
* @AD7793_IEXEC1_IEXEC2_IOUT2: Both current sources connected to Pin IOUT2.
* Only valid when the current ources are set to 10 uA or 210 uA.
*/
enum ad7793_current_source_direction {
AD7793_IEXEC1_IOUT1_IEXEC2_IOUT2 = 0,
AD7793_IEXEC1_IOUT2_IEXEC2_IOUT1 = 1,
AD7793_IEXEC1_IEXEC2_IOUT1 = 2,
AD7793_IEXEC1_IEXEC2_IOUT2 = 3,
};
/**
* enum ad7793_excitation_current - AD7793 excitation current selection
* @AD7793_IX_DISABLED: Excitation current Disabled.
* @AD7793_IX_10uA: Enable 10 micro-ampere excitation current.
* @AD7793_IX_210uA: Enable 210 micro-ampere excitation current.
* @AD7793_IX_1mA: Enable 1 milli-Ampere excitation current.
*/
enum ad7793_excitation_current {
AD7793_IX_DISABLED = 0,
AD7793_IX_10uA = 1,
AD7793_IX_210uA = 2,
AD7793_IX_1mA = 3,
};
/**
* struct ad7793_platform_data - AD7793 platform data
* @clock_src: Clock source selection
* @burnout_current: If set to true the 100nA burnout current is enabled.
* @boost_enable: Enable boost for the bias voltage generator.
* @buffered: If set to true configure the device for buffered input mode.
* @unipolar: If set to true sample in unipolar mode, if set to false sample in
* bipolar mode.
* @refsel: Reference voltage selection
* @bias_voltage: Bias voltage selection
* @exitation_current: Excitation current selection
* @current_source_direction: Excitation current direction selection
*/
struct ad7793_platform_data {
enum ad7793_clock_source clock_src;
bool burnout_current;
bool boost_enable;
bool buffered;
bool unipolar;
enum ad7793_refsel refsel;
enum ad7793_bias_voltage bias_voltage;
enum ad7793_excitation_current exitation_current;
enum ad7793_current_source_direction current_source_direction;
};
#endif /* IIO_ADC_AD7793_H_ */