1 /* 2 * AD7792/AD7793 SPI ADC driver 3 * 4 * Copyright 2011 Analog Devices Inc. 5 * 6 * Licensed under the GPL-2. 7 */ 8 #ifndef __LINUX_PLATFORM_DATA_AD7793_H__ 9 #define __LINUX_PLATFORM_DATA_AD7793_H__ 10 11 /** 12 * enum ad7793_clock_source - AD7793 clock source selection 13 * @AD7793_CLK_SRC_INT: Internal 64 kHz clock, not available at the CLK pin. 14 * @AD7793_CLK_SRC_INT_CO: Internal 64 kHz clock, available at the CLK pin. 15 * @AD7793_CLK_SRC_EXT: Use external clock. 16 * @AD7793_CLK_SRC_EXT_DIV2: Use external clock divided by 2. 17 */ 18 enum ad7793_clock_source { 19 AD7793_CLK_SRC_INT, 20 AD7793_CLK_SRC_INT_CO, 21 AD7793_CLK_SRC_EXT, 22 AD7793_CLK_SRC_EXT_DIV2, 23 }; 24 25 /** 26 * enum ad7793_bias_voltage - AD7793 bias voltage selection 27 * @AD7793_BIAS_VOLTAGE_DISABLED: Bias voltage generator disabled 28 * @AD7793_BIAS_VOLTAGE_AIN1: Bias voltage connected to AIN1(-). 29 * @AD7793_BIAS_VOLTAGE_AIN2: Bias voltage connected to AIN2(-). 30 * @AD7793_BIAS_VOLTAGE_AIN3: Bias voltage connected to AIN3(-). 31 * Only valid for AD7795/AD7796. 32 */ 33 enum ad7793_bias_voltage { 34 AD7793_BIAS_VOLTAGE_DISABLED, 35 AD7793_BIAS_VOLTAGE_AIN1, 36 AD7793_BIAS_VOLTAGE_AIN2, 37 AD7793_BIAS_VOLTAGE_AIN3, 38 }; 39 40 /** 41 * enum ad7793_refsel - AD7793 reference voltage selection 42 * @AD7793_REFSEL_REFIN1: External reference applied between REFIN1(+) 43 * and REFIN1(-). 44 * @AD7793_REFSEL_REFIN2: External reference applied between REFIN2(+) and 45 * and REFIN1(-). Only valid for AD7795/AD7796. 46 * @AD7793_REFSEL_INTERNAL: Internal 1.17 V reference. 47 */ 48 enum ad7793_refsel { 49 AD7793_REFSEL_REFIN1 = 0, 50 AD7793_REFSEL_REFIN2 = 1, 51 AD7793_REFSEL_INTERNAL = 2, 52 }; 53 54 /** 55 * enum ad7793_current_source_direction - AD7793 excitation current direction 56 * @AD7793_IEXEC1_IOUT1_IEXEC2_IOUT2: Current source IEXC1 connected to pin 57 * IOUT1, current source IEXC2 connected to pin IOUT2. 58 * @AD7793_IEXEC1_IOUT2_IEXEC2_IOUT1: Current source IEXC2 connected to pin 59 * IOUT1, current source IEXC1 connected to pin IOUT2. 60 * @AD7793_IEXEC1_IEXEC2_IOUT1: Both current sources connected to pin IOUT1. 61 * Only valid when the current sources are set to 10 uA or 210 uA. 62 * @AD7793_IEXEC1_IEXEC2_IOUT2: Both current sources connected to Pin IOUT2. 63 * Only valid when the current ources are set to 10 uA or 210 uA. 64 */ 65 enum ad7793_current_source_direction { 66 AD7793_IEXEC1_IOUT1_IEXEC2_IOUT2 = 0, 67 AD7793_IEXEC1_IOUT2_IEXEC2_IOUT1 = 1, 68 AD7793_IEXEC1_IEXEC2_IOUT1 = 2, 69 AD7793_IEXEC1_IEXEC2_IOUT2 = 3, 70 }; 71 72 /** 73 * enum ad7793_excitation_current - AD7793 excitation current selection 74 * @AD7793_IX_DISABLED: Excitation current Disabled. 75 * @AD7793_IX_10uA: Enable 10 micro-ampere excitation current. 76 * @AD7793_IX_210uA: Enable 210 micro-ampere excitation current. 77 * @AD7793_IX_1mA: Enable 1 milli-Ampere excitation current. 78 */ 79 enum ad7793_excitation_current { 80 AD7793_IX_DISABLED = 0, 81 AD7793_IX_10uA = 1, 82 AD7793_IX_210uA = 2, 83 AD7793_IX_1mA = 3, 84 }; 85 86 /** 87 * struct ad7793_platform_data - AD7793 platform data 88 * @clock_src: Clock source selection 89 * @burnout_current: If set to true the 100nA burnout current is enabled. 90 * @boost_enable: Enable boost for the bias voltage generator. 91 * @buffered: If set to true configure the device for buffered input mode. 92 * @unipolar: If set to true sample in unipolar mode, if set to false sample in 93 * bipolar mode. 94 * @refsel: Reference voltage selection 95 * @bias_voltage: Bias voltage selection 96 * @exitation_current: Excitation current selection 97 * @current_source_direction: Excitation current direction selection 98 */ 99 struct ad7793_platform_data { 100 enum ad7793_clock_source clock_src; 101 bool burnout_current; 102 bool boost_enable; 103 bool buffered; 104 bool unipolar; 105 106 enum ad7793_refsel refsel; 107 enum ad7793_bias_voltage bias_voltage; 108 enum ad7793_excitation_current exitation_current; 109 enum ad7793_current_source_direction current_source_direction; 110 }; 111 112 #endif /* IIO_ADC_AD7793_H_ */ 113
