1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Fuel gauge driver for Maxim 17042 / 8966 / 8997
4 * Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
6 * Copyright (C) 2011 Samsung Electronics
7 * MyungJoo Ham <myungjoo.ham@samsung.com>
10 #ifndef __MAX17042_BATTERY_H_
11 #define __MAX17042_BATTERY_H_
13 #define MAX17042_STATUS_BattAbsent (1 << 3)
14 #define MAX17042_BATTERY_FULL (95) /* Recommend. FullSOCThr value */
15 #define MAX17042_DEFAULT_SNS_RESISTOR (10000)
16 #define MAX17042_DEFAULT_VMIN (3000)
17 #define MAX17042_DEFAULT_VMAX (4500) /* LiHV cell max */
18 #define MAX17042_DEFAULT_TEMP_MIN (0) /* For sys without temp sensor */
19 #define MAX17042_DEFAULT_TEMP_MAX (700) /* 70 degrees Celcius */
21 /* Consider RepCap which is less then 10 units below FullCAP full */
22 #define MAX17042_FULL_THRESHOLD 10
24 #define MAX17042_CHARACTERIZATION_DATA_SIZE 48
26 enum max17042_register {
27 MAX17042_STATUS = 0x00,
28 MAX17042_VALRT_Th = 0x01,
29 MAX17042_TALRT_Th = 0x02,
30 MAX17042_SALRT_Th = 0x03,
31 MAX17042_AtRate = 0x04,
32 MAX17042_RepCap = 0x05,
33 MAX17042_RepSOC = 0x06,
36 MAX17042_VCELL = 0x09,
37 MAX17042_Current = 0x0A,
38 MAX17042_AvgCurrent = 0x0B,
41 MAX17042_AvSOC = 0x0E,
42 MAX17042_RemCap = 0x0F,
43 MAX17042_FullCAP = 0x10,
45 MAX17042_V_empty = 0x12,
47 MAX17042_RSLOW = 0x14,
49 MAX17042_AvgTA = 0x16,
50 MAX17042_Cycles = 0x17,
51 MAX17042_DesignCap = 0x18,
52 MAX17042_AvgVCELL = 0x19,
53 MAX17042_MinMaxTemp = 0x1A,
54 MAX17042_MinMaxVolt = 0x1B,
55 MAX17042_MinMaxCurr = 0x1C,
56 MAX17042_CONFIG = 0x1D,
57 MAX17042_ICHGTerm = 0x1E,
58 MAX17042_AvCap = 0x1F,
59 MAX17042_ManName = 0x20,
60 MAX17042_DevName = 0x21,
62 MAX17042_FullCAPNom = 0x23,
63 MAX17042_TempNom = 0x24,
64 MAX17042_TempLim = 0x25,
65 MAX17042_TempHot = 0x26,
67 MAX17042_LearnCFG = 0x28,
68 MAX17042_FilterCFG = 0x29,
69 MAX17042_RelaxCFG = 0x2A,
70 MAX17042_MiscCFG = 0x2B,
71 MAX17042_TGAIN = 0x2C,
73 MAX17042_CGAIN = 0x2E,
76 MAX17042_MaskSOC = 0x32,
77 MAX17042_SOC_empty = 0x33,
78 MAX17042_T_empty = 0x34,
80 MAX17042_FullCAP0 = 0x35,
81 MAX17042_LAvg_empty = 0x36,
83 MAX17042_RCOMP0 = 0x38,
84 MAX17042_TempCo = 0x39,
85 MAX17042_EmptyTempCo = 0x3A,
86 MAX17042_K_empty0 = 0x3B,
87 MAX17042_TaskPeriod = 0x3C,
88 MAX17042_FSTAT = 0x3D,
90 MAX17042_SHDNTIMER = 0x3F,
92 MAX17042_dQacc = 0x45,
93 MAX17042_dPacc = 0x46,
95 MAX17042_VFSOC0 = 0x48,
100 MAX17042_VFSOC0Enable = 0x60,
101 MAX17042_MLOCKReg1 = 0x62,
102 MAX17042_MLOCKReg2 = 0x63,
104 MAX17042_MODELChrTbl = 0x80,
108 MAX17042_OCVInternal = 0xFB,
110 MAX17042_VFSOC = 0xFF,
113 /* Registers specific to max17047/50 */
114 enum max17047_register {
115 MAX17047_QRTbl00 = 0x12,
116 MAX17047_FullSOCThr = 0x13,
117 MAX17047_QRTbl10 = 0x22,
118 MAX17047_QRTbl20 = 0x32,
119 MAX17047_V_empty = 0x3A,
120 MAX17047_QRTbl30 = 0x42,
123 enum max170xx_chip_type {
124 MAXIM_DEVICE_TYPE_UNKNOWN = 0,
125 MAXIM_DEVICE_TYPE_MAX17042,
126 MAXIM_DEVICE_TYPE_MAX17047,
127 MAXIM_DEVICE_TYPE_MAX17050,
129 MAXIM_DEVICE_TYPE_NUM
133 * used for setting a register to a desired value
134 * addr : address for a register
135 * data : setting value for the register
137 struct max17042_reg_data {
142 struct max17042_config_data {
143 /* External current sense resistor value in milli-ohms */
146 /* A/D measurement */
147 u16 tgain; /* 0x2C */
149 u16 cgain; /* 0x2E */
153 u16 valrt_thresh; /* 0x01 */
154 u16 talrt_thresh; /* 0x02 */
155 u16 soc_alrt_thresh; /* 0x03 */
156 u16 config; /* 0x01D */
157 u16 shdntimer; /* 0x03F */
160 u16 full_soc_thresh; /* 0x13 */
161 u16 design_cap; /* 0x18 */
162 u16 ichgt_term; /* 0x1E */
165 u16 at_rate; /* 0x04 */
166 u16 learn_cfg; /* 0x28 */
167 u16 filter_cfg; /* 0x29 */
168 u16 relax_cfg; /* 0x2A */
169 u16 misc_cfg; /* 0x2B */
170 u16 masksoc; /* 0x32 */
172 /* MG3 save and restore */
173 u16 fullcap; /* 0x10 */
174 u16 fullcapnom; /* 0x23 */
175 u16 socempty; /* 0x33 */
176 u16 lavg_empty; /* 0x36 */
177 u16 dqacc; /* 0x45 */
178 u16 dpacc; /* 0x46 */
179 u16 qrtbl00; /* 0x12 */
180 u16 qrtbl10; /* 0x22 */
181 u16 qrtbl20; /* 0x32 */
182 u16 qrtbl30; /* 0x42 */
184 /* Cell technology from power_supply.h */
188 u16 vempty; /* 0x12 */
189 u16 temp_nom; /* 0x24 */
190 u16 temp_lim; /* 0x25 */
192 u16 rcomp0; /* 0x38 */
193 u16 tcompc0; /* 0x39 */
194 u16 empty_tempco; /* 0x3A */
195 u16 kempty0; /* 0x3B */
196 u16 cell_char_tbl[MAX17042_CHARACTERIZATION_DATA_SIZE];
199 struct max17042_platform_data {
200 struct max17042_reg_data *init_data;
201 struct max17042_config_data *config_data;
202 int num_init_data; /* Number of enties in init_data array */
203 bool enable_current_sense;
204 bool enable_por_init; /* Use POR init from Maxim appnote */
207 * R_sns in micro-ohms.
208 * default 10000 (if r_sns = 0) as it is the recommended value by
209 * the datasheet although it can be changed by board designers.
212 int vmin; /* in millivolts */
213 int vmax; /* in millivolts */
214 int temp_min; /* in tenths of degree Celsius */
215 int temp_max; /* in tenths of degree Celsius */
218 #endif /* __MAX17042_BATTERY_H_ */