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88bc3054 MH |
1 | /* |
2 | * AD7792/AD7793 SPI ADC driver | |
3 | * | |
4 | * Copyright 2011 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2. | |
7 | */ | |
f87f1a23 LPC |
8 | #ifndef __LINUX_PLATFORM_DATA_AD7793_H__ |
9 | #define __LINUX_PLATFORM_DATA_AD7793_H__ | |
88bc3054 | 10 | |
d21f30c9 LPC |
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 | |
d21f30c9 LPC |
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 | */ | |
88bc3054 | 99 | struct ad7793_platform_data { |
d21f30c9 LPC |
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; | |
88bc3054 MH |
110 | }; |
111 | ||
112 | #endif /* IIO_ADC_AD7793_H_ */ |