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 | */ |
17 | enum 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 | */ |
32 | enum 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 | */ |
47 | enum 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 | */ |
64 | enum 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 | */ |
78 | enum 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 | */ |
98 | struct 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 | |