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(+) and
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_ */