1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Code shared between the different Qualcomm PMIC voltage ADCs
*/
#ifndef QCOM_VADC_COMMON_H
#define QCOM_VADC_COMMON_H
#define VADC_CONV_TIME_MIN_US 2000
#define VADC_CONV_TIME_MAX_US 2100
/* Min ADC code represents 0V */
#define VADC_MIN_ADC_CODE 0x6000
/* Max ADC code represents full-scale range of 1.8V */
#define VADC_MAX_ADC_CODE 0xa800
#define VADC_ABSOLUTE_RANGE_UV 625000
#define VADC_RATIOMETRIC_RANGE 1800
#define VADC_DEF_PRESCALING 0 /* 1:1 */
#define VADC_DEF_DECIMATION 0 /* 512 */
#define VADC_DEF_HW_SETTLE_TIME 0 /* 0 us */
#define VADC_DEF_AVG_SAMPLES 0 /* 1 sample */
#define VADC_DEF_CALIB_TYPE VADC_CALIB_ABSOLUTE
#define VADC_DECIMATION_MIN 512
#define VADC_DECIMATION_MAX 4096
#define ADC5_DEF_VBAT_PRESCALING 1 /* 1:3 */
#define ADC5_DECIMATION_SHORT 250
#define ADC5_DECIMATION_MEDIUM 420
#define ADC5_DECIMATION_LONG 840
/* Default decimation - 1024 for rev2, 840 for pmic5 */
#define ADC5_DECIMATION_DEFAULT 2
#define ADC5_DECIMATION_SAMPLES_MAX 3
#define VADC_HW_SETTLE_DELAY_MAX 10000
#define VADC_HW_SETTLE_SAMPLES_MAX 16
#define VADC_AVG_SAMPLES_MAX 512
#define ADC5_AVG_SAMPLES_MAX 16
#define PMIC5_CHG_TEMP_SCALE_FACTOR 377500
#define PMIC5_SMB_TEMP_CONSTANT 419400
#define PMIC5_SMB_TEMP_SCALE_FACTOR 356
#define PMI_CHG_SCALE_1 -138890
#define PMI_CHG_SCALE_2 391750000000LL
#define VADC5_MAX_CODE 0x7fff
#define ADC5_FULL_SCALE_CODE 0x70e4
#define ADC5_USR_DATA_CHECK 0x8000
/**
* struct vadc_map_pt - Map the graph representation for ADC channel
* @x: Represent the ADC digitized code.
* @y: Represent the physical data which can be temperature, voltage,
* resistance.
*/
struct vadc_map_pt {
s32 x;
s32 y;
};
/*
* VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels.
* VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for
* calibration.
*/
enum vadc_calibration {
VADC_CALIB_ABSOLUTE = 0,
VADC_CALIB_RATIOMETRIC
};
/**
* struct vadc_linear_graph - Represent ADC characteristics.
* @dy: numerator slope to calculate the gain.
* @dx: denominator slope to calculate the gain.
* @gnd: A/D word of the ground reference used for the channel.
*
* Each ADC device has different offset and gain parameters which are
* computed to calibrate the device.
*/
struct vadc_linear_graph {
s32 dy;
s32 dx;
s32 gnd;
};
/**
* struct vadc_prescale_ratio - Represent scaling ratio for ADC input.
* @num: the inverse numerator of the gain applied to the input channel.
* @den: the inverse denominator of the gain applied to the input channel.
*/
struct vadc_prescale_ratio {
u32 num;
u32 den;
};
/**
* enum vadc_scale_fn_type - Scaling function to convert ADC code to
* physical scaled units for the channel.
* SCALE_DEFAULT: Default scaling to convert raw adc code to voltage (uV).
* SCALE_THERM_100K_PULLUP: Returns temperature in millidegC.
* Uses a mapping table with 100K pullup.
* SCALE_PMIC_THERM: Returns result in milli degree's Centigrade.
* SCALE_XOTHERM: Returns XO thermistor voltage in millidegC.
* SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp
* SCALE_HW_CALIB_DEFAULT: Default scaling to convert raw adc code to
* voltage (uV) with hardware applied offset/slope values to adc code.
* SCALE_HW_CALIB_THERM_100K_PULLUP: Returns temperature in millidegC using
* lookup table. The hardware applies offset/slope to adc code.
* SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using
* 100k pullup. The hardware applies offset/slope to adc code.
* SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
* The hardware applies offset/slope to adc code.
* SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5
* charger temperature.
* SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5
* SMB1390 temperature.
*/
enum vadc_scale_fn_type {
SCALE_DEFAULT = 0,
SCALE_THERM_100K_PULLUP,
SCALE_PMIC_THERM,
SCALE_XOTHERM,
SCALE_PMI_CHG_TEMP,
SCALE_HW_CALIB_DEFAULT,
SCALE_HW_CALIB_THERM_100K_PULLUP,
SCALE_HW_CALIB_XOTHERM,
SCALE_HW_CALIB_PMIC_THERM,
SCALE_HW_CALIB_PM5_CHG_TEMP,
SCALE_HW_CALIB_PM5_SMB_TEMP,
SCALE_HW_CALIB_INVALID,
};
struct adc5_data {
const u32 full_scale_code_volt;
const u32 full_scale_code_cur;
const struct adc5_channels *adc_chans;
unsigned int *decimation;
unsigned int *hw_settle_1;
unsigned int *hw_settle_2;
};
int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
const struct vadc_linear_graph *calib_graph,
const struct vadc_prescale_ratio *prescale,
bool absolute,
u16 adc_code, int *result_mdec);
struct qcom_adc5_scale_type {
int (*scale_fn)(const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data, u16 adc_code, int *result);
};
int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data,
u16 adc_code, int *result_mdec);
int qcom_vadc_decimation_from_dt(u32 value);
#endif /* QCOM_VADC_COMMON_H */
|
