LXR linux/include/linux/platform

   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_ */
 112