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