ad7793.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * AD7792/AD7793 SPI ADC driver
  4 *
  5 * Copyright 2011 Analog Devices Inc.
  6 */
  7#ifndef __LINUX_PLATFORM_DATA_AD7793_H__
  8#define __LINUX_PLATFORM_DATA_AD7793_H__
  9
 10/**
 11 * enum ad7793_clock_source - AD7793 clock source selection
 12 * @AD7793_CLK_SRC_INT: Internal 64 kHz clock, not available at the CLK pin.
 13 * @AD7793_CLK_SRC_INT_CO: Internal 64 kHz clock, available at the CLK pin.
 14 * @AD7793_CLK_SRC_EXT: Use external clock.
 15 * @AD7793_CLK_SRC_EXT_DIV2: Use external clock divided by 2.
 16 */
 17enum ad7793_clock_source {
 18	AD7793_CLK_SRC_INT,
 19	AD7793_CLK_SRC_INT_CO,
 20	AD7793_CLK_SRC_EXT,
 21	AD7793_CLK_SRC_EXT_DIV2,
 22};
 23
 24/**
 25 * enum ad7793_bias_voltage - AD7793 bias voltage selection
 26 * @AD7793_BIAS_VOLTAGE_DISABLED: Bias voltage generator disabled
 27 * @AD7793_BIAS_VOLTAGE_AIN1: Bias voltage connected to AIN1(-).
 28 * @AD7793_BIAS_VOLTAGE_AIN2: Bias voltage connected to AIN2(-).
 29 * @AD7793_BIAS_VOLTAGE_AIN3: Bias voltage connected to AIN3(-).
 30 *	Only valid for AD7795/AD7796.
 31 */
 32enum ad7793_bias_voltage {
 33	AD7793_BIAS_VOLTAGE_DISABLED,
 34	AD7793_BIAS_VOLTAGE_AIN1,
 35	AD7793_BIAS_VOLTAGE_AIN2,
 36	AD7793_BIAS_VOLTAGE_AIN3,
 37};
 38
 39/**
 40 * enum ad7793_refsel - AD7793 reference voltage selection
 41 * @AD7793_REFSEL_REFIN1: External reference applied between REFIN1(+)
 42 *	and REFIN1(-).
 43 * @AD7793_REFSEL_REFIN2: External reference applied between REFIN2(+)
 44 *	and REFIN1(-). Only valid for AD7795/AD7796.
 45 * @AD7793_REFSEL_INTERNAL: Internal 1.17 V reference.
 46 */
 47enum ad7793_refsel {
 48	AD7793_REFSEL_REFIN1 = 0,
 49	AD7793_REFSEL_REFIN2 = 1,
 50	AD7793_REFSEL_INTERNAL = 2,
 51};
 52
 53/**
 54 * enum ad7793_current_source_direction - AD7793 excitation current direction
 55 * @AD7793_IEXEC1_IOUT1_IEXEC2_IOUT2: Current source IEXC1 connected to pin
 56 *	IOUT1, current source IEXC2 connected to pin IOUT2.
 57 * @AD7793_IEXEC1_IOUT2_IEXEC2_IOUT1: Current source IEXC2 connected to pin
 58 *	IOUT1, current source IEXC1 connected to pin IOUT2.
 59 * @AD7793_IEXEC1_IEXEC2_IOUT1: Both current sources connected to pin IOUT1.
 60 *	Only valid when the current sources are set to 10 uA or 210 uA.
 61 * @AD7793_IEXEC1_IEXEC2_IOUT2: Both current sources connected to Pin IOUT2.
 62 *	Only valid when the current ources are set to 10 uA or 210 uA.
 63 */
 64enum ad7793_current_source_direction {
 65	AD7793_IEXEC1_IOUT1_IEXEC2_IOUT2 = 0,
 66	AD7793_IEXEC1_IOUT2_IEXEC2_IOUT1 = 1,
 67	AD7793_IEXEC1_IEXEC2_IOUT1 = 2,
 68	AD7793_IEXEC1_IEXEC2_IOUT2 = 3,
 69};
 70
 71/**
 72 * enum ad7793_excitation_current - AD7793 excitation current selection
 73 * @AD7793_IX_DISABLED: Excitation current Disabled.
 74 * @AD7793_IX_10uA: Enable 10 micro-ampere excitation current.
 75 * @AD7793_IX_210uA: Enable 210 micro-ampere excitation current.
 76 * @AD7793_IX_1mA: Enable 1 milli-Ampere excitation current.
 77 */
 78enum ad7793_excitation_current {
 79	AD7793_IX_DISABLED = 0,
 80	AD7793_IX_10uA = 1,
 81	AD7793_IX_210uA = 2,
 82	AD7793_IX_1mA = 3,
 83};
 84
 85/**
 86 * struct ad7793_platform_data - AD7793 platform data
 87 * @clock_src: Clock source selection
 88 * @burnout_current: If set to true the 100nA burnout current is enabled.
 89 * @boost_enable: Enable boost for the bias voltage generator.
 90 * @buffered: If set to true configure the device for buffered input mode.
 91 * @unipolar: If set to true sample in unipolar mode, if set to false sample in
 92 *		bipolar mode.
 93 * @refsel: Reference voltage selection
 94 * @bias_voltage: Bias voltage selection
 95 * @exitation_current: Excitation current selection
 96 * @current_source_direction: Excitation current direction selection
 97 */
 98struct ad7793_platform_data {
 99	enum ad7793_clock_source clock_src;
100	bool burnout_current;
101	bool boost_enable;
102	bool buffered;
103	bool unipolar;
104
105	enum ad7793_refsel refsel;
106	enum ad7793_bias_voltage bias_voltage;
107	enum ad7793_excitation_current exitation_current;
108	enum ad7793_current_source_direction current_source_direction;
109};
110
111#endif /* IIO_ADC_AD7793_H_ */