Commit | Line | Data |
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359ab9f5 MH |
1 | /* |
2 | * Fuel gauge driver for Maxim 17042 / 8966 / 8997 | |
3 | * Note that Maxim 8966 and 8997 are mfd and this is its subdevice. | |
4 | * | |
5 | * Copyright (C) 2011 Samsung Electronics | |
6 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | * This driver is based on max17040_battery.c | |
23 | */ | |
24 | ||
25 | #include <linux/init.h> | |
7e6d62db | 26 | #include <linux/module.h> |
359ab9f5 MH |
27 | #include <linux/slab.h> |
28 | #include <linux/i2c.h> | |
f3a71a6e | 29 | #include <linux/delay.h> |
e5f3872d | 30 | #include <linux/interrupt.h> |
48bc1774 | 31 | #include <linux/pm.h> |
359ab9f5 MH |
32 | #include <linux/mod_devicetable.h> |
33 | #include <linux/power_supply.h> | |
34 | #include <linux/power/max17042_battery.h> | |
3832246d | 35 | #include <linux/of.h> |
39e7213e | 36 | #include <linux/regmap.h> |
359ab9f5 | 37 | |
f3a71a6e RP |
38 | /* Status register bits */ |
39 | #define STATUS_POR_BIT (1 << 1) | |
40 | #define STATUS_BST_BIT (1 << 3) | |
41 | #define STATUS_VMN_BIT (1 << 8) | |
42 | #define STATUS_TMN_BIT (1 << 9) | |
43 | #define STATUS_SMN_BIT (1 << 10) | |
44 | #define STATUS_BI_BIT (1 << 11) | |
45 | #define STATUS_VMX_BIT (1 << 12) | |
46 | #define STATUS_TMX_BIT (1 << 13) | |
47 | #define STATUS_SMX_BIT (1 << 14) | |
48 | #define STATUS_BR_BIT (1 << 15) | |
49 | ||
e5f3872d RP |
50 | /* Interrupt mask bits */ |
51 | #define CONFIG_ALRT_BIT_ENBL (1 << 2) | |
5cdd4d7f RP |
52 | #define STATUS_INTR_SOCMIN_BIT (1 << 10) |
53 | #define STATUS_INTR_SOCMAX_BIT (1 << 14) | |
e5f3872d | 54 | |
f3a71a6e RP |
55 | #define VFSOC0_LOCK 0x0000 |
56 | #define VFSOC0_UNLOCK 0x0080 | |
57 | #define MODEL_UNLOCK1 0X0059 | |
58 | #define MODEL_UNLOCK2 0X00C4 | |
59 | #define MODEL_LOCK1 0X0000 | |
60 | #define MODEL_LOCK2 0X0000 | |
61 | ||
62 | #define dQ_ACC_DIV 0x4 | |
63 | #define dP_ACC_100 0x1900 | |
64 | #define dP_ACC_200 0x3200 | |
65 | ||
9a8422d2 RP |
66 | #define MAX17042_IC_VERSION 0x0092 |
67 | #define MAX17047_IC_VERSION 0x00AC /* same for max17050 */ | |
68 | ||
359ab9f5 MH |
69 | struct max17042_chip { |
70 | struct i2c_client *client; | |
39e7213e | 71 | struct regmap *regmap; |
297d716f | 72 | struct power_supply *battery; |
9a8422d2 | 73 | enum max170xx_chip_type chip_type; |
359ab9f5 | 74 | struct max17042_platform_data *pdata; |
f3a71a6e RP |
75 | struct work_struct work; |
76 | int init_complete; | |
359ab9f5 MH |
77 | }; |
78 | ||
359ab9f5 | 79 | static enum power_supply_property max17042_battery_props[] = { |
086ef502 DK |
80 | POWER_SUPPLY_PROP_PRESENT, |
81 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
82 | POWER_SUPPLY_PROP_VOLTAGE_MAX, | |
83 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
359ab9f5 MH |
84 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
85 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
a2ebfe2f | 86 | POWER_SUPPLY_PROP_VOLTAGE_OCV, |
359ab9f5 | 87 | POWER_SUPPLY_PROP_CAPACITY, |
086ef502 | 88 | POWER_SUPPLY_PROP_CHARGE_FULL, |
5fc55bc8 | 89 | POWER_SUPPLY_PROP_CHARGE_COUNTER, |
086ef502 DK |
90 | POWER_SUPPLY_PROP_TEMP, |
91 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
92 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
359ab9f5 MH |
93 | }; |
94 | ||
95 | static int max17042_get_property(struct power_supply *psy, | |
96 | enum power_supply_property psp, | |
97 | union power_supply_propval *val) | |
98 | { | |
297d716f | 99 | struct max17042_chip *chip = power_supply_get_drvdata(psy); |
39e7213e | 100 | struct regmap *map = chip->regmap; |
60a1f6e4 | 101 | int ret; |
39e7213e | 102 | u32 data; |
359ab9f5 | 103 | |
f3a71a6e RP |
104 | if (!chip->init_complete) |
105 | return -EAGAIN; | |
106 | ||
359ab9f5 | 107 | switch (psp) { |
086ef502 | 108 | case POWER_SUPPLY_PROP_PRESENT: |
39e7213e | 109 | ret = regmap_read(map, MAX17042_STATUS, &data); |
60a1f6e4 RP |
110 | if (ret < 0) |
111 | return ret; | |
112 | ||
39e7213e | 113 | if (data & MAX17042_STATUS_BattAbsent) |
086ef502 DK |
114 | val->intval = 0; |
115 | else | |
116 | val->intval = 1; | |
117 | break; | |
118 | case POWER_SUPPLY_PROP_CYCLE_COUNT: | |
39e7213e | 119 | ret = regmap_read(map, MAX17042_Cycles, &data); |
60a1f6e4 RP |
120 | if (ret < 0) |
121 | return ret; | |
122 | ||
39e7213e | 123 | val->intval = data; |
086ef502 DK |
124 | break; |
125 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: | |
39e7213e | 126 | ret = regmap_read(map, MAX17042_MinMaxVolt, &data); |
60a1f6e4 RP |
127 | if (ret < 0) |
128 | return ret; | |
129 | ||
39e7213e | 130 | val->intval = data >> 8; |
086ef502 DK |
131 | val->intval *= 20000; /* Units of LSB = 20mV */ |
132 | break; | |
133 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
9a8422d2 | 134 | if (chip->chip_type == MAX17042) |
39e7213e | 135 | ret = regmap_read(map, MAX17042_V_empty, &data); |
9a8422d2 | 136 | else |
39e7213e | 137 | ret = regmap_read(map, MAX17047_V_empty, &data); |
60a1f6e4 RP |
138 | if (ret < 0) |
139 | return ret; | |
140 | ||
39e7213e | 141 | val->intval = data >> 7; |
086ef502 DK |
142 | val->intval *= 10000; /* Units of LSB = 10mV */ |
143 | break; | |
359ab9f5 | 144 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
39e7213e | 145 | ret = regmap_read(map, MAX17042_VCELL, &data); |
60a1f6e4 RP |
146 | if (ret < 0) |
147 | return ret; | |
148 | ||
39e7213e | 149 | val->intval = data * 625 / 8; |
359ab9f5 MH |
150 | break; |
151 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
39e7213e | 152 | ret = regmap_read(map, MAX17042_AvgVCELL, &data); |
60a1f6e4 RP |
153 | if (ret < 0) |
154 | return ret; | |
155 | ||
39e7213e | 156 | val->intval = data * 625 / 8; |
a2ebfe2f RP |
157 | break; |
158 | case POWER_SUPPLY_PROP_VOLTAGE_OCV: | |
39e7213e | 159 | ret = regmap_read(map, MAX17042_OCVInternal, &data); |
a2ebfe2f RP |
160 | if (ret < 0) |
161 | return ret; | |
162 | ||
39e7213e | 163 | val->intval = data * 625 / 8; |
359ab9f5 MH |
164 | break; |
165 | case POWER_SUPPLY_PROP_CAPACITY: | |
39e7213e | 166 | ret = regmap_read(map, MAX17042_RepSOC, &data); |
60a1f6e4 RP |
167 | if (ret < 0) |
168 | return ret; | |
169 | ||
39e7213e | 170 | val->intval = data >> 8; |
359ab9f5 | 171 | break; |
086ef502 | 172 | case POWER_SUPPLY_PROP_CHARGE_FULL: |
39e7213e | 173 | ret = regmap_read(map, MAX17042_FullCAP, &data); |
60a1f6e4 RP |
174 | if (ret < 0) |
175 | return ret; | |
176 | ||
39e7213e | 177 | val->intval = data * 1000 / 2; |
5fc55bc8 RP |
178 | break; |
179 | case POWER_SUPPLY_PROP_CHARGE_COUNTER: | |
39e7213e | 180 | ret = regmap_read(map, MAX17042_QH, &data); |
5fc55bc8 RP |
181 | if (ret < 0) |
182 | return ret; | |
183 | ||
39e7213e | 184 | val->intval = data * 1000 / 2; |
086ef502 DK |
185 | break; |
186 | case POWER_SUPPLY_PROP_TEMP: | |
39e7213e | 187 | ret = regmap_read(map, MAX17042_TEMP, &data); |
60a1f6e4 RP |
188 | if (ret < 0) |
189 | return ret; | |
190 | ||
39e7213e | 191 | val->intval = data; |
086ef502 DK |
192 | /* The value is signed. */ |
193 | if (val->intval & 0x8000) { | |
194 | val->intval = (0x7fff & ~val->intval) + 1; | |
195 | val->intval *= -1; | |
196 | } | |
197 | /* The value is converted into deci-centigrade scale */ | |
198 | /* Units of LSB = 1 / 256 degree Celsius */ | |
199 | val->intval = val->intval * 10 / 256; | |
200 | break; | |
201 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
202 | if (chip->pdata->enable_current_sense) { | |
39e7213e | 203 | ret = regmap_read(map, MAX17042_Current, &data); |
60a1f6e4 RP |
204 | if (ret < 0) |
205 | return ret; | |
206 | ||
39e7213e | 207 | val->intval = data; |
086ef502 DK |
208 | if (val->intval & 0x8000) { |
209 | /* Negative */ | |
210 | val->intval = ~val->intval & 0x7fff; | |
211 | val->intval++; | |
212 | val->intval *= -1; | |
213 | } | |
91d8b0d6 | 214 | val->intval *= 1562500 / chip->pdata->r_sns; |
086ef502 DK |
215 | } else { |
216 | return -EINVAL; | |
217 | } | |
218 | break; | |
219 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
220 | if (chip->pdata->enable_current_sense) { | |
39e7213e | 221 | ret = regmap_read(map, MAX17042_AvgCurrent, &data); |
60a1f6e4 RP |
222 | if (ret < 0) |
223 | return ret; | |
224 | ||
39e7213e | 225 | val->intval = data; |
086ef502 DK |
226 | if (val->intval & 0x8000) { |
227 | /* Negative */ | |
228 | val->intval = ~val->intval & 0x7fff; | |
229 | val->intval++; | |
230 | val->intval *= -1; | |
231 | } | |
232 | val->intval *= 1562500 / chip->pdata->r_sns; | |
233 | } else { | |
234 | return -EINVAL; | |
235 | } | |
236 | break; | |
359ab9f5 MH |
237 | default: |
238 | return -EINVAL; | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
39e7213e | 243 | static int max17042_write_verify_reg(struct regmap *map, u8 reg, u32 value) |
f3a71a6e RP |
244 | { |
245 | int retries = 8; | |
246 | int ret; | |
39e7213e | 247 | u32 read_value; |
f3a71a6e RP |
248 | |
249 | do { | |
39e7213e JL |
250 | ret = regmap_write(map, reg, value); |
251 | regmap_read(map, reg, &read_value); | |
f3a71a6e RP |
252 | if (read_value != value) { |
253 | ret = -EIO; | |
254 | retries--; | |
255 | } | |
256 | } while (retries && read_value != value); | |
257 | ||
258 | if (ret < 0) | |
39e7213e | 259 | pr_err("%s: err %d\n", __func__, ret); |
f3a71a6e RP |
260 | |
261 | return ret; | |
262 | } | |
263 | ||
39e7213e JL |
264 | static inline void max17042_override_por(struct regmap *map, |
265 | u8 reg, u16 value) | |
f3a71a6e RP |
266 | { |
267 | if (value) | |
39e7213e | 268 | regmap_write(map, reg, value); |
f3a71a6e RP |
269 | } |
270 | ||
271 | static inline void max10742_unlock_model(struct max17042_chip *chip) | |
272 | { | |
39e7213e JL |
273 | struct regmap *map = chip->regmap; |
274 | regmap_write(map, MAX17042_MLOCKReg1, MODEL_UNLOCK1); | |
275 | regmap_write(map, MAX17042_MLOCKReg2, MODEL_UNLOCK2); | |
f3a71a6e RP |
276 | } |
277 | ||
278 | static inline void max10742_lock_model(struct max17042_chip *chip) | |
279 | { | |
39e7213e JL |
280 | struct regmap *map = chip->regmap; |
281 | ||
282 | regmap_write(map, MAX17042_MLOCKReg1, MODEL_LOCK1); | |
283 | regmap_write(map, MAX17042_MLOCKReg2, MODEL_LOCK2); | |
f3a71a6e RP |
284 | } |
285 | ||
286 | static inline void max17042_write_model_data(struct max17042_chip *chip, | |
287 | u8 addr, int size) | |
288 | { | |
39e7213e | 289 | struct regmap *map = chip->regmap; |
f3a71a6e RP |
290 | int i; |
291 | for (i = 0; i < size; i++) | |
39e7213e JL |
292 | regmap_write(map, addr + i, |
293 | chip->pdata->config_data->cell_char_tbl[i]); | |
f3a71a6e RP |
294 | } |
295 | ||
296 | static inline void max17042_read_model_data(struct max17042_chip *chip, | |
39e7213e | 297 | u8 addr, u32 *data, int size) |
f3a71a6e | 298 | { |
39e7213e | 299 | struct regmap *map = chip->regmap; |
f3a71a6e RP |
300 | int i; |
301 | ||
302 | for (i = 0; i < size; i++) | |
39e7213e | 303 | regmap_read(map, addr + i, &data[i]); |
f3a71a6e RP |
304 | } |
305 | ||
306 | static inline int max17042_model_data_compare(struct max17042_chip *chip, | |
307 | u16 *data1, u16 *data2, int size) | |
308 | { | |
309 | int i; | |
310 | ||
311 | if (memcmp(data1, data2, size)) { | |
312 | dev_err(&chip->client->dev, "%s compare failed\n", __func__); | |
313 | for (i = 0; i < size; i++) | |
314 | dev_info(&chip->client->dev, "0x%x, 0x%x", | |
315 | data1[i], data2[i]); | |
316 | dev_info(&chip->client->dev, "\n"); | |
317 | return -EINVAL; | |
318 | } | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int max17042_init_model(struct max17042_chip *chip) | |
323 | { | |
324 | int ret; | |
1ef3d8fb | 325 | int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl); |
39e7213e | 326 | u32 *temp_data; |
f3a71a6e | 327 | |
1ef3d8fb | 328 | temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL); |
f3a71a6e RP |
329 | if (!temp_data) |
330 | return -ENOMEM; | |
331 | ||
332 | max10742_unlock_model(chip); | |
333 | max17042_write_model_data(chip, MAX17042_MODELChrTbl, | |
334 | table_size); | |
335 | max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data, | |
336 | table_size); | |
337 | ||
338 | ret = max17042_model_data_compare( | |
339 | chip, | |
340 | chip->pdata->config_data->cell_char_tbl, | |
39e7213e | 341 | (u16 *)temp_data, |
f3a71a6e RP |
342 | table_size); |
343 | ||
344 | max10742_lock_model(chip); | |
345 | kfree(temp_data); | |
346 | ||
347 | return ret; | |
348 | } | |
349 | ||
350 | static int max17042_verify_model_lock(struct max17042_chip *chip) | |
351 | { | |
352 | int i; | |
1ef3d8fb | 353 | int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl); |
39e7213e | 354 | u32 *temp_data; |
f3a71a6e RP |
355 | int ret = 0; |
356 | ||
1ef3d8fb | 357 | temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL); |
f3a71a6e RP |
358 | if (!temp_data) |
359 | return -ENOMEM; | |
360 | ||
361 | max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data, | |
362 | table_size); | |
363 | for (i = 0; i < table_size; i++) | |
364 | if (temp_data[i]) | |
365 | ret = -EINVAL; | |
366 | ||
367 | kfree(temp_data); | |
368 | return ret; | |
369 | } | |
370 | ||
371 | static void max17042_write_config_regs(struct max17042_chip *chip) | |
372 | { | |
373 | struct max17042_config_data *config = chip->pdata->config_data; | |
39e7213e | 374 | struct regmap *map = chip->regmap; |
f3a71a6e | 375 | |
39e7213e JL |
376 | regmap_write(map, MAX17042_CONFIG, config->config); |
377 | regmap_write(map, MAX17042_LearnCFG, config->learn_cfg); | |
378 | regmap_write(map, MAX17042_FilterCFG, | |
f3a71a6e | 379 | config->filter_cfg); |
39e7213e | 380 | regmap_write(map, MAX17042_RelaxCFG, config->relax_cfg); |
9a8422d2 | 381 | if (chip->chip_type == MAX17047) |
39e7213e | 382 | regmap_write(map, MAX17047_FullSOCThr, |
9a8422d2 | 383 | config->full_soc_thresh); |
f3a71a6e RP |
384 | } |
385 | ||
386 | static void max17042_write_custom_regs(struct max17042_chip *chip) | |
387 | { | |
388 | struct max17042_config_data *config = chip->pdata->config_data; | |
39e7213e | 389 | struct regmap *map = chip->regmap; |
f3a71a6e | 390 | |
39e7213e JL |
391 | max17042_write_verify_reg(map, MAX17042_RCOMP0, config->rcomp0); |
392 | max17042_write_verify_reg(map, MAX17042_TempCo, config->tcompc0); | |
393 | max17042_write_verify_reg(map, MAX17042_ICHGTerm, config->ichgt_term); | |
9a8422d2 | 394 | if (chip->chip_type == MAX17042) { |
39e7213e JL |
395 | regmap_write(map, MAX17042_EmptyTempCo, config->empty_tempco); |
396 | max17042_write_verify_reg(map, MAX17042_K_empty0, | |
9a8422d2 RP |
397 | config->kempty0); |
398 | } else { | |
39e7213e | 399 | max17042_write_verify_reg(map, MAX17047_QRTbl00, |
9a8422d2 | 400 | config->qrtbl00); |
39e7213e | 401 | max17042_write_verify_reg(map, MAX17047_QRTbl10, |
9a8422d2 | 402 | config->qrtbl10); |
39e7213e | 403 | max17042_write_verify_reg(map, MAX17047_QRTbl20, |
9a8422d2 | 404 | config->qrtbl20); |
39e7213e | 405 | max17042_write_verify_reg(map, MAX17047_QRTbl30, |
9a8422d2 RP |
406 | config->qrtbl30); |
407 | } | |
f3a71a6e RP |
408 | } |
409 | ||
410 | static void max17042_update_capacity_regs(struct max17042_chip *chip) | |
411 | { | |
412 | struct max17042_config_data *config = chip->pdata->config_data; | |
39e7213e | 413 | struct regmap *map = chip->regmap; |
f3a71a6e | 414 | |
39e7213e | 415 | max17042_write_verify_reg(map, MAX17042_FullCAP, |
f3a71a6e | 416 | config->fullcap); |
39e7213e JL |
417 | regmap_write(map, MAX17042_DesignCap, config->design_cap); |
418 | max17042_write_verify_reg(map, MAX17042_FullCAPNom, | |
f3a71a6e RP |
419 | config->fullcapnom); |
420 | } | |
421 | ||
422 | static void max17042_reset_vfsoc0_reg(struct max17042_chip *chip) | |
423 | { | |
39e7213e JL |
424 | unsigned int vfSoc; |
425 | struct regmap *map = chip->regmap; | |
f3a71a6e | 426 | |
39e7213e JL |
427 | regmap_read(map, MAX17042_VFSOC, &vfSoc); |
428 | regmap_write(map, MAX17042_VFSOC0Enable, VFSOC0_UNLOCK); | |
429 | max17042_write_verify_reg(map, MAX17042_VFSOC0, vfSoc); | |
430 | regmap_write(map, MAX17042_VFSOC0Enable, VFSOC0_LOCK); | |
f3a71a6e RP |
431 | } |
432 | ||
433 | static void max17042_load_new_capacity_params(struct max17042_chip *chip) | |
434 | { | |
39e7213e | 435 | u32 full_cap0, rep_cap, dq_acc, vfSoc; |
f3a71a6e RP |
436 | u32 rem_cap; |
437 | ||
438 | struct max17042_config_data *config = chip->pdata->config_data; | |
39e7213e | 439 | struct regmap *map = chip->regmap; |
f3a71a6e | 440 | |
39e7213e JL |
441 | regmap_read(map, MAX17042_FullCAP0, &full_cap0); |
442 | regmap_read(map, MAX17042_VFSOC, &vfSoc); | |
f3a71a6e RP |
443 | |
444 | /* fg_vfSoc needs to shifted by 8 bits to get the | |
445 | * perc in 1% accuracy, to get the right rem_cap multiply | |
446 | * full_cap0, fg_vfSoc and devide by 100 | |
447 | */ | |
448 | rem_cap = ((vfSoc >> 8) * full_cap0) / 100; | |
39e7213e | 449 | max17042_write_verify_reg(map, MAX17042_RemCap, rem_cap); |
f3a71a6e | 450 | |
39e7213e JL |
451 | rep_cap = rem_cap; |
452 | max17042_write_verify_reg(map, MAX17042_RepCap, rep_cap); | |
f3a71a6e RP |
453 | |
454 | /* Write dQ_acc to 200% of Capacity and dP_acc to 200% */ | |
455 | dq_acc = config->fullcap / dQ_ACC_DIV; | |
39e7213e JL |
456 | max17042_write_verify_reg(map, MAX17042_dQacc, dq_acc); |
457 | max17042_write_verify_reg(map, MAX17042_dPacc, dP_ACC_200); | |
f3a71a6e | 458 | |
39e7213e | 459 | max17042_write_verify_reg(map, MAX17042_FullCAP, |
f3a71a6e | 460 | config->fullcap); |
39e7213e | 461 | regmap_write(map, MAX17042_DesignCap, |
f3a71a6e | 462 | config->design_cap); |
39e7213e | 463 | max17042_write_verify_reg(map, MAX17042_FullCAPNom, |
f3a71a6e | 464 | config->fullcapnom); |
9a8422d2 | 465 | /* Update SOC register with new SOC */ |
39e7213e | 466 | regmap_write(map, MAX17042_RepSOC, vfSoc); |
f3a71a6e RP |
467 | } |
468 | ||
469 | /* | |
470 | * Block write all the override values coming from platform data. | |
471 | * This function MUST be called before the POR initialization proceedure | |
472 | * specified by maxim. | |
473 | */ | |
474 | static inline void max17042_override_por_values(struct max17042_chip *chip) | |
475 | { | |
39e7213e | 476 | struct regmap *map = chip->regmap; |
f3a71a6e RP |
477 | struct max17042_config_data *config = chip->pdata->config_data; |
478 | ||
39e7213e JL |
479 | max17042_override_por(map, MAX17042_TGAIN, config->tgain); |
480 | max17042_override_por(map, MAx17042_TOFF, config->toff); | |
481 | max17042_override_por(map, MAX17042_CGAIN, config->cgain); | |
482 | max17042_override_por(map, MAX17042_COFF, config->coff); | |
483 | ||
484 | max17042_override_por(map, MAX17042_VALRT_Th, config->valrt_thresh); | |
485 | max17042_override_por(map, MAX17042_TALRT_Th, config->talrt_thresh); | |
486 | max17042_override_por(map, MAX17042_SALRT_Th, | |
487 | config->soc_alrt_thresh); | |
488 | max17042_override_por(map, MAX17042_CONFIG, config->config); | |
489 | max17042_override_por(map, MAX17042_SHDNTIMER, config->shdntimer); | |
490 | ||
491 | max17042_override_por(map, MAX17042_DesignCap, config->design_cap); | |
492 | max17042_override_por(map, MAX17042_ICHGTerm, config->ichgt_term); | |
493 | ||
494 | max17042_override_por(map, MAX17042_AtRate, config->at_rate); | |
495 | max17042_override_por(map, MAX17042_LearnCFG, config->learn_cfg); | |
496 | max17042_override_por(map, MAX17042_FilterCFG, config->filter_cfg); | |
497 | max17042_override_por(map, MAX17042_RelaxCFG, config->relax_cfg); | |
498 | max17042_override_por(map, MAX17042_MiscCFG, config->misc_cfg); | |
499 | max17042_override_por(map, MAX17042_MaskSOC, config->masksoc); | |
500 | ||
501 | max17042_override_por(map, MAX17042_FullCAP, config->fullcap); | |
502 | max17042_override_por(map, MAX17042_FullCAPNom, config->fullcapnom); | |
9a8422d2 | 503 | if (chip->chip_type == MAX17042) |
39e7213e | 504 | max17042_override_por(map, MAX17042_SOC_empty, |
9a8422d2 | 505 | config->socempty); |
39e7213e JL |
506 | max17042_override_por(map, MAX17042_LAvg_empty, config->lavg_empty); |
507 | max17042_override_por(map, MAX17042_dQacc, config->dqacc); | |
508 | max17042_override_por(map, MAX17042_dPacc, config->dpacc); | |
f3a71a6e | 509 | |
9a8422d2 | 510 | if (chip->chip_type == MAX17042) |
39e7213e | 511 | max17042_override_por(map, MAX17042_V_empty, config->vempty); |
9a8422d2 | 512 | else |
39e7213e JL |
513 | max17042_override_por(map, MAX17047_V_empty, config->vempty); |
514 | max17042_override_por(map, MAX17042_TempNom, config->temp_nom); | |
515 | max17042_override_por(map, MAX17042_TempLim, config->temp_lim); | |
516 | max17042_override_por(map, MAX17042_FCTC, config->fctc); | |
517 | max17042_override_por(map, MAX17042_RCOMP0, config->rcomp0); | |
518 | max17042_override_por(map, MAX17042_TempCo, config->tcompc0); | |
9a8422d2 | 519 | if (chip->chip_type) { |
39e7213e JL |
520 | max17042_override_por(map, MAX17042_EmptyTempCo, |
521 | config->empty_tempco); | |
522 | max17042_override_por(map, MAX17042_K_empty0, | |
523 | config->kempty0); | |
9a8422d2 | 524 | } |
f3a71a6e RP |
525 | } |
526 | ||
527 | static int max17042_init_chip(struct max17042_chip *chip) | |
528 | { | |
39e7213e | 529 | struct regmap *map = chip->regmap; |
f3a71a6e | 530 | int ret; |
f3a71a6e RP |
531 | |
532 | max17042_override_por_values(chip); | |
533 | /* After Power up, the MAX17042 requires 500mS in order | |
534 | * to perform signal debouncing and initial SOC reporting | |
535 | */ | |
536 | msleep(500); | |
537 | ||
538 | /* Initialize configaration */ | |
539 | max17042_write_config_regs(chip); | |
540 | ||
541 | /* write cell characterization data */ | |
542 | ret = max17042_init_model(chip); | |
543 | if (ret) { | |
544 | dev_err(&chip->client->dev, "%s init failed\n", | |
545 | __func__); | |
546 | return -EIO; | |
547 | } | |
a879f19f AC |
548 | |
549 | ret = max17042_verify_model_lock(chip); | |
f3a71a6e RP |
550 | if (ret) { |
551 | dev_err(&chip->client->dev, "%s lock verify failed\n", | |
552 | __func__); | |
553 | return -EIO; | |
554 | } | |
555 | /* write custom parameters */ | |
556 | max17042_write_custom_regs(chip); | |
557 | ||
558 | /* update capacity params */ | |
559 | max17042_update_capacity_regs(chip); | |
560 | ||
561 | /* delay must be atleast 350mS to allow VFSOC | |
562 | * to be calculated from the new configuration | |
563 | */ | |
564 | msleep(350); | |
565 | ||
566 | /* reset vfsoc0 reg */ | |
567 | max17042_reset_vfsoc0_reg(chip); | |
568 | ||
569 | /* load new capacity params */ | |
570 | max17042_load_new_capacity_params(chip); | |
571 | ||
572 | /* Init complete, Clear the POR bit */ | |
bc352686 | 573 | regmap_update_bits(map, MAX17042_STATUS, STATUS_POR_BIT, 0x0); |
f3a71a6e RP |
574 | return 0; |
575 | } | |
576 | ||
e5f3872d RP |
577 | static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off) |
578 | { | |
39e7213e JL |
579 | struct regmap *map = chip->regmap; |
580 | u32 soc, soc_tr; | |
e5f3872d RP |
581 | |
582 | /* program interrupt thesholds such that we should | |
583 | * get interrupt for every 'off' perc change in the soc | |
584 | */ | |
39e7213e JL |
585 | regmap_read(map, MAX17042_RepSOC, &soc); |
586 | soc >>= 8; | |
e5f3872d RP |
587 | soc_tr = (soc + off) << 8; |
588 | soc_tr |= (soc - off); | |
39e7213e | 589 | regmap_write(map, MAX17042_SALRT_Th, soc_tr); |
e5f3872d RP |
590 | } |
591 | ||
e5f3872d RP |
592 | static irqreturn_t max17042_thread_handler(int id, void *dev) |
593 | { | |
594 | struct max17042_chip *chip = dev; | |
39e7213e | 595 | u32 val; |
e5f3872d | 596 | |
39e7213e | 597 | regmap_read(chip->regmap, MAX17042_STATUS, &val); |
5cdd4d7f RP |
598 | if ((val & STATUS_INTR_SOCMIN_BIT) || |
599 | (val & STATUS_INTR_SOCMAX_BIT)) { | |
e5f3872d RP |
600 | dev_info(&chip->client->dev, "SOC threshold INTR\n"); |
601 | max17042_set_soc_threshold(chip, 1); | |
602 | } | |
603 | ||
297d716f | 604 | power_supply_changed(chip->battery); |
e5f3872d RP |
605 | return IRQ_HANDLED; |
606 | } | |
f3a71a6e RP |
607 | |
608 | static void max17042_init_worker(struct work_struct *work) | |
609 | { | |
610 | struct max17042_chip *chip = container_of(work, | |
611 | struct max17042_chip, work); | |
612 | int ret; | |
613 | ||
614 | /* Initialize registers according to values from the platform data */ | |
615 | if (chip->pdata->enable_por_init && chip->pdata->config_data) { | |
616 | ret = max17042_init_chip(chip); | |
617 | if (ret) | |
618 | return; | |
619 | } | |
620 | ||
621 | chip->init_complete = 1; | |
622 | } | |
623 | ||
3832246d KL |
624 | #ifdef CONFIG_OF |
625 | static struct max17042_platform_data * | |
626 | max17042_get_pdata(struct device *dev) | |
627 | { | |
628 | struct device_node *np = dev->of_node; | |
629 | u32 prop; | |
630 | struct max17042_platform_data *pdata; | |
631 | ||
632 | if (!np) | |
633 | return dev->platform_data; | |
634 | ||
635 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
636 | if (!pdata) | |
637 | return NULL; | |
638 | ||
639 | /* | |
640 | * Require current sense resistor value to be specified for | |
641 | * current-sense functionality to be enabled at all. | |
642 | */ | |
643 | if (of_property_read_u32(np, "maxim,rsns-microohm", &prop) == 0) { | |
644 | pdata->r_sns = prop; | |
645 | pdata->enable_current_sense = true; | |
646 | } | |
647 | ||
648 | return pdata; | |
649 | } | |
650 | #else | |
651 | static struct max17042_platform_data * | |
652 | max17042_get_pdata(struct device *dev) | |
653 | { | |
654 | return dev->platform_data; | |
655 | } | |
656 | #endif | |
657 | ||
e0291285 | 658 | static const struct regmap_config max17042_regmap_config = { |
39e7213e JL |
659 | .reg_bits = 8, |
660 | .val_bits = 16, | |
661 | .val_format_endian = REGMAP_ENDIAN_NATIVE, | |
662 | }; | |
663 | ||
297d716f KK |
664 | static const struct power_supply_desc max17042_psy_desc = { |
665 | .name = "max170xx_battery", | |
666 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
667 | .get_property = max17042_get_property, | |
668 | .properties = max17042_battery_props, | |
669 | .num_properties = ARRAY_SIZE(max17042_battery_props), | |
670 | }; | |
671 | ||
672 | static const struct power_supply_desc max17042_no_current_sense_psy_desc = { | |
673 | .name = "max170xx_battery", | |
674 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
675 | .get_property = max17042_get_property, | |
676 | .properties = max17042_battery_props, | |
677 | .num_properties = ARRAY_SIZE(max17042_battery_props) - 2, | |
678 | }; | |
679 | ||
c8afa640 | 680 | static int max17042_probe(struct i2c_client *client, |
359ab9f5 MH |
681 | const struct i2c_device_id *id) |
682 | { | |
683 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
297d716f KK |
684 | const struct power_supply_desc *max17042_desc = &max17042_psy_desc; |
685 | struct power_supply_config psy_cfg = {}; | |
359ab9f5 MH |
686 | struct max17042_chip *chip; |
687 | int ret; | |
39e7213e JL |
688 | int i; |
689 | u32 val; | |
359ab9f5 MH |
690 | |
691 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) | |
692 | return -EIO; | |
693 | ||
2f3b4342 | 694 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
359ab9f5 MH |
695 | if (!chip) |
696 | return -ENOMEM; | |
697 | ||
698 | chip->client = client; | |
39e7213e JL |
699 | chip->regmap = devm_regmap_init_i2c(client, &max17042_regmap_config); |
700 | if (IS_ERR(chip->regmap)) { | |
701 | dev_err(&client->dev, "Failed to initialize regmap\n"); | |
702 | return -EINVAL; | |
703 | } | |
704 | ||
3832246d KL |
705 | chip->pdata = max17042_get_pdata(&client->dev); |
706 | if (!chip->pdata) { | |
707 | dev_err(&client->dev, "no platform data provided\n"); | |
708 | return -EINVAL; | |
709 | } | |
359ab9f5 MH |
710 | |
711 | i2c_set_clientdata(client, chip); | |
297d716f | 712 | psy_cfg.drv_data = chip; |
359ab9f5 | 713 | |
39e7213e JL |
714 | regmap_read(chip->regmap, MAX17042_DevName, &val); |
715 | if (val == MAX17042_IC_VERSION) { | |
9a8422d2 RP |
716 | dev_dbg(&client->dev, "chip type max17042 detected\n"); |
717 | chip->chip_type = MAX17042; | |
39e7213e | 718 | } else if (val == MAX17047_IC_VERSION) { |
9a8422d2 RP |
719 | dev_dbg(&client->dev, "chip type max17047/50 detected\n"); |
720 | chip->chip_type = MAX17047; | |
721 | } else { | |
39e7213e | 722 | dev_err(&client->dev, "device version mismatch: %x\n", val); |
9a8422d2 RP |
723 | return -EIO; |
724 | } | |
725 | ||
086ef502 DK |
726 | /* When current is not measured, |
727 | * CURRENT_NOW and CURRENT_AVG properties should be invisible. */ | |
728 | if (!chip->pdata->enable_current_sense) | |
297d716f | 729 | max17042_desc = &max17042_no_current_sense_psy_desc; |
086ef502 | 730 | |
4cfa892c PR |
731 | if (chip->pdata->r_sns == 0) |
732 | chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR; | |
733 | ||
086ef502 | 734 | if (chip->pdata->init_data) |
39e7213e JL |
735 | for (i = 0; i < chip->pdata->num_init_data; i++) |
736 | regmap_write(chip->regmap, | |
737 | chip->pdata->init_data[i].addr, | |
738 | chip->pdata->init_data[i].data); | |
086ef502 | 739 | |
359ab9f5 | 740 | if (!chip->pdata->enable_current_sense) { |
39e7213e JL |
741 | regmap_write(chip->regmap, MAX17042_CGAIN, 0x0000); |
742 | regmap_write(chip->regmap, MAX17042_MiscCFG, 0x0003); | |
743 | regmap_write(chip->regmap, MAX17042_LearnCFG, 0x0007); | |
359ab9f5 MH |
744 | } |
745 | ||
297d716f KK |
746 | chip->battery = power_supply_register(&client->dev, max17042_desc, |
747 | &psy_cfg); | |
748 | if (IS_ERR(chip->battery)) { | |
243e3527 | 749 | dev_err(&client->dev, "failed: power supply register\n"); |
297d716f | 750 | return PTR_ERR(chip->battery); |
243e3527 RP |
751 | } |
752 | ||
e5f3872d | 753 | if (client->irq) { |
5cdd4d7f | 754 | ret = request_threaded_irq(client->irq, NULL, |
26740dbb JL |
755 | max17042_thread_handler, |
756 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
297d716f | 757 | chip->battery->desc->name, chip); |
e5f3872d | 758 | if (!ret) { |
bc352686 KK |
759 | regmap_update_bits(chip->regmap, MAX17042_CONFIG, |
760 | CONFIG_ALRT_BIT_ENBL, | |
761 | CONFIG_ALRT_BIT_ENBL); | |
e5f3872d | 762 | max17042_set_soc_threshold(chip, 1); |
e5ba50bc RP |
763 | } else { |
764 | client->irq = 0; | |
e5f3872d RP |
765 | dev_err(&client->dev, "%s(): cannot get IRQ\n", |
766 | __func__); | |
e5ba50bc | 767 | } |
e5f3872d RP |
768 | } |
769 | ||
39e7213e JL |
770 | regmap_read(chip->regmap, MAX17042_STATUS, &val); |
771 | if (val & STATUS_POR_BIT) { | |
f3a71a6e RP |
772 | INIT_WORK(&chip->work, max17042_init_worker); |
773 | schedule_work(&chip->work); | |
774 | } else { | |
775 | chip->init_complete = 1; | |
776 | } | |
777 | ||
243e3527 | 778 | return 0; |
359ab9f5 MH |
779 | } |
780 | ||
415ec69f | 781 | static int max17042_remove(struct i2c_client *client) |
359ab9f5 MH |
782 | { |
783 | struct max17042_chip *chip = i2c_get_clientdata(client); | |
784 | ||
bb28da90 RP |
785 | if (client->irq) |
786 | free_irq(client->irq, chip); | |
297d716f | 787 | power_supply_unregister(chip->battery); |
359ab9f5 MH |
788 | return 0; |
789 | } | |
790 | ||
3d23c7f4 | 791 | #ifdef CONFIG_PM_SLEEP |
48bc1774 RP |
792 | static int max17042_suspend(struct device *dev) |
793 | { | |
794 | struct max17042_chip *chip = dev_get_drvdata(dev); | |
795 | ||
48e41c70 AV |
796 | /* |
797 | * disable the irq and enable irq_wake | |
48bc1774 RP |
798 | * capability to the interrupt line. |
799 | */ | |
800 | if (chip->client->irq) { | |
801 | disable_irq(chip->client->irq); | |
802 | enable_irq_wake(chip->client->irq); | |
803 | } | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | static int max17042_resume(struct device *dev) | |
809 | { | |
810 | struct max17042_chip *chip = dev_get_drvdata(dev); | |
811 | ||
812 | if (chip->client->irq) { | |
813 | disable_irq_wake(chip->client->irq); | |
814 | enable_irq(chip->client->irq); | |
815 | /* re-program the SOC thresholds to 1% change */ | |
816 | max17042_set_soc_threshold(chip, 1); | |
817 | } | |
818 | ||
819 | return 0; | |
820 | } | |
48bc1774 RP |
821 | #endif |
822 | ||
3d23c7f4 MB |
823 | static SIMPLE_DEV_PM_OPS(max17042_pm_ops, max17042_suspend, |
824 | max17042_resume); | |
825 | ||
3832246d KL |
826 | #ifdef CONFIG_OF |
827 | static const struct of_device_id max17042_dt_match[] = { | |
828 | { .compatible = "maxim,max17042" }, | |
9a8422d2 RP |
829 | { .compatible = "maxim,max17047" }, |
830 | { .compatible = "maxim,max17050" }, | |
3832246d KL |
831 | { }, |
832 | }; | |
833 | MODULE_DEVICE_TABLE(of, max17042_dt_match); | |
834 | #endif | |
835 | ||
359ab9f5 MH |
836 | static const struct i2c_device_id max17042_id[] = { |
837 | { "max17042", 0 }, | |
9a8422d2 RP |
838 | { "max17047", 1 }, |
839 | { "max17050", 2 }, | |
359ab9f5 MH |
840 | { } |
841 | }; | |
842 | MODULE_DEVICE_TABLE(i2c, max17042_id); | |
843 | ||
844 | static struct i2c_driver max17042_i2c_driver = { | |
845 | .driver = { | |
846 | .name = "max17042", | |
3832246d | 847 | .of_match_table = of_match_ptr(max17042_dt_match), |
3d23c7f4 | 848 | .pm = &max17042_pm_ops, |
359ab9f5 MH |
849 | }, |
850 | .probe = max17042_probe, | |
28ea73f4 | 851 | .remove = max17042_remove, |
359ab9f5 MH |
852 | .id_table = max17042_id, |
853 | }; | |
5ff92e7a | 854 | module_i2c_driver(max17042_i2c_driver); |
359ab9f5 MH |
855 | |
856 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
857 | MODULE_DESCRIPTION("MAX17042 Fuel Gauge"); | |
858 | MODULE_LICENSE("GPL"); |