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55e64701 | 1 | /* |
3682a8ee | 2 | * max14577_charger.c - Battery charger driver for the Maxim 14577/77836 |
55e64701 | 3 | * |
3682a8ee | 4 | * Copyright (C) 2013,2014 Samsung Electronics |
55e64701 KK |
5 | * Krzysztof Kozlowski <k.kozlowski@samsung.com> |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/mfd/max14577-private.h> | |
e30110e9 | 22 | #include <linux/mfd/max14577.h> |
55e64701 KK |
23 | |
24 | struct max14577_charger { | |
25 | struct device *dev; | |
26 | struct max14577 *max14577; | |
27 | struct power_supply charger; | |
28 | ||
3682a8ee KK |
29 | unsigned int charging_state; |
30 | unsigned int battery_state; | |
e30110e9 KK |
31 | |
32 | struct max14577_charger_platform_data *pdata; | |
55e64701 KK |
33 | }; |
34 | ||
3682a8ee KK |
35 | /* |
36 | * Helper function for mapping values of STATUS2/CHGTYP register on max14577 | |
37 | * and max77836 chipsets to enum maxim_muic_charger_type. | |
38 | */ | |
39 | static enum max14577_muic_charger_type maxim_get_charger_type( | |
40 | enum maxim_device_type dev_type, u8 val) { | |
41 | switch (val) { | |
42 | case MAX14577_CHARGER_TYPE_NONE: | |
43 | case MAX14577_CHARGER_TYPE_USB: | |
44 | case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: | |
45 | case MAX14577_CHARGER_TYPE_DEDICATED_CHG: | |
46 | case MAX14577_CHARGER_TYPE_SPECIAL_500MA: | |
47 | case MAX14577_CHARGER_TYPE_SPECIAL_1A: | |
48 | return val; | |
49 | case MAX14577_CHARGER_TYPE_DEAD_BATTERY: | |
50 | case MAX14577_CHARGER_TYPE_RESERVED: | |
51 | if (dev_type == MAXIM_DEVICE_TYPE_MAX77836) | |
52 | val |= 0x8; | |
53 | return val; | |
54 | default: | |
55 | WARN_ONCE(1, "max14577: Unsupported chgtyp register value 0x%02x", val); | |
56 | return val; | |
57 | } | |
58 | } | |
59 | ||
55e64701 KK |
60 | static int max14577_get_charger_state(struct max14577_charger *chg) |
61 | { | |
62 | struct regmap *rmap = chg->max14577->regmap; | |
63 | int state = POWER_SUPPLY_STATUS_DISCHARGING; | |
64 | u8 reg_data; | |
65 | ||
66 | /* | |
67 | * Charging occurs only if: | |
68 | * - CHGCTRL2/MBCHOSTEN == 1 | |
69 | * - STATUS2/CGMBC == 1 | |
70 | * | |
71 | * TODO: | |
72 | * - handle FULL after Top-off timer (EOC register may be off | |
73 | * and the charger won't be charging although MBCHOSTEN is on) | |
74 | * - handle properly dead-battery charging (respect timer) | |
75 | * - handle timers (fast-charge and prequal) /MBCCHGERR/ | |
76 | */ | |
77 | max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, ®_data); | |
78 | if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) | |
79 | goto state_set; | |
80 | ||
81 | max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data); | |
82 | if (reg_data & STATUS3_CGMBC_MASK) { | |
83 | /* Charger or USB-cable is connected */ | |
84 | if (reg_data & STATUS3_EOC_MASK) | |
85 | state = POWER_SUPPLY_STATUS_FULL; | |
86 | else | |
87 | state = POWER_SUPPLY_STATUS_CHARGING; | |
88 | goto state_set; | |
89 | } | |
90 | ||
91 | state_set: | |
92 | chg->charging_state = state; | |
93 | return state; | |
94 | } | |
95 | ||
96 | /* | |
97 | * Supported charge types: | |
98 | * - POWER_SUPPLY_CHARGE_TYPE_NONE | |
99 | * - POWER_SUPPLY_CHARGE_TYPE_FAST | |
100 | */ | |
101 | static int max14577_get_charge_type(struct max14577_charger *chg) | |
102 | { | |
103 | /* | |
104 | * TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)? | |
105 | * As spec says: | |
106 | * [after reaching EOC interrupt] | |
107 | * "When the battery is fully charged, the 30-minute (typ) | |
108 | * top-off timer starts. The device continues to trickle | |
109 | * charge the battery until the top-off timer runs out." | |
110 | */ | |
111 | if (max14577_get_charger_state(chg) == POWER_SUPPLY_STATUS_CHARGING) | |
112 | return POWER_SUPPLY_CHARGE_TYPE_FAST; | |
113 | return POWER_SUPPLY_CHARGE_TYPE_NONE; | |
114 | } | |
115 | ||
116 | static int max14577_get_online(struct max14577_charger *chg) | |
117 | { | |
118 | struct regmap *rmap = chg->max14577->regmap; | |
119 | u8 reg_data; | |
3682a8ee | 120 | enum max14577_muic_charger_type chg_type; |
55e64701 KK |
121 | |
122 | max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, ®_data); | |
123 | reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT); | |
3682a8ee KK |
124 | chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data); |
125 | switch (chg_type) { | |
55e64701 KK |
126 | case MAX14577_CHARGER_TYPE_USB: |
127 | case MAX14577_CHARGER_TYPE_DEDICATED_CHG: | |
128 | case MAX14577_CHARGER_TYPE_SPECIAL_500MA: | |
129 | case MAX14577_CHARGER_TYPE_SPECIAL_1A: | |
130 | case MAX14577_CHARGER_TYPE_DEAD_BATTERY: | |
3682a8ee | 131 | case MAX77836_CHARGER_TYPE_SPECIAL_BIAS: |
55e64701 KK |
132 | return 1; |
133 | case MAX14577_CHARGER_TYPE_NONE: | |
134 | case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: | |
135 | case MAX14577_CHARGER_TYPE_RESERVED: | |
3682a8ee | 136 | case MAX77836_CHARGER_TYPE_RESERVED: |
55e64701 KK |
137 | default: |
138 | return 0; | |
139 | } | |
140 | } | |
141 | ||
142 | /* | |
143 | * Supported health statuses: | |
144 | * - POWER_SUPPLY_HEALTH_DEAD | |
145 | * - POWER_SUPPLY_HEALTH_OVERVOLTAGE | |
146 | * - POWER_SUPPLY_HEALTH_GOOD | |
147 | */ | |
148 | static int max14577_get_battery_health(struct max14577_charger *chg) | |
149 | { | |
150 | struct regmap *rmap = chg->max14577->regmap; | |
151 | int state = POWER_SUPPLY_HEALTH_GOOD; | |
152 | u8 reg_data; | |
3682a8ee | 153 | enum max14577_muic_charger_type chg_type; |
55e64701 KK |
154 | |
155 | max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, ®_data); | |
156 | reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT); | |
3682a8ee KK |
157 | chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data); |
158 | if (chg_type == MAX14577_CHARGER_TYPE_DEAD_BATTERY) { | |
55e64701 KK |
159 | state = POWER_SUPPLY_HEALTH_DEAD; |
160 | goto state_set; | |
161 | } | |
162 | ||
163 | max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data); | |
164 | if (reg_data & STATUS3_OVP_MASK) { | |
165 | state = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
166 | goto state_set; | |
167 | } | |
168 | ||
169 | state_set: | |
170 | chg->battery_state = state; | |
171 | return state; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Always returns 1. | |
176 | * The max14577 chip doesn't report any status of battery presence. | |
177 | * Lets assume that it will always be used with some battery. | |
178 | */ | |
179 | static int max14577_get_present(struct max14577_charger *chg) | |
180 | { | |
181 | return 1; | |
182 | } | |
183 | ||
e30110e9 KK |
184 | static int max14577_set_fast_charge_timer(struct max14577_charger *chg, |
185 | unsigned long hours) | |
186 | { | |
187 | u8 reg_data; | |
188 | ||
189 | switch (hours) { | |
190 | case 5 ... 7: | |
191 | reg_data = hours - 3; | |
192 | break; | |
193 | case 0: | |
194 | /* Disable */ | |
195 | reg_data = 0x7; | |
196 | break; | |
197 | default: | |
198 | dev_err(chg->dev, "Wrong value for Fast-Charge Timer: %lu\n", | |
199 | hours); | |
200 | return -EINVAL; | |
201 | } | |
202 | reg_data <<= CHGCTRL1_TCHW_SHIFT; | |
203 | ||
204 | return max14577_update_reg(chg->max14577->regmap, | |
205 | MAX14577_REG_CHGCTRL1, CHGCTRL1_TCHW_MASK, reg_data); | |
206 | } | |
207 | ||
208 | static int max14577_init_constant_voltage(struct max14577_charger *chg, | |
209 | unsigned int uvolt) | |
210 | { | |
211 | u8 reg_data; | |
212 | ||
213 | if (uvolt < MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN || | |
214 | uvolt > MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX) | |
215 | return -EINVAL; | |
216 | ||
217 | if (uvolt == 4200000) | |
218 | reg_data = 0x0; | |
219 | else if (uvolt == MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX) | |
220 | reg_data = 0x1f; | |
221 | else if (uvolt <= 4280000) { | |
222 | unsigned int val = uvolt; | |
223 | ||
224 | val -= MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN; | |
225 | val /= MAXIM_CHARGER_CONSTANT_VOLTAGE_STEP; | |
226 | if (uvolt <= 4180000) | |
227 | reg_data = 0x1 + val; | |
228 | else | |
229 | reg_data = val; /* Fix for gap between 4.18V and 4.22V */ | |
230 | } else | |
231 | return -EINVAL; | |
232 | ||
233 | reg_data <<= CHGCTRL3_MBCCVWRC_SHIFT; | |
234 | ||
235 | return max14577_write_reg(chg->max14577->regmap, | |
236 | MAX14577_CHG_REG_CHG_CTRL3, reg_data); | |
237 | } | |
238 | ||
239 | static int max14577_init_eoc(struct max14577_charger *chg, | |
240 | unsigned int uamp) | |
241 | { | |
242 | unsigned int current_bits = 0xf; | |
243 | u8 reg_data; | |
244 | ||
245 | switch (chg->max14577->dev_type) { | |
246 | case MAXIM_DEVICE_TYPE_MAX77836: | |
247 | if (uamp < 5000) | |
248 | return -EINVAL; /* Requested current is too low */ | |
249 | ||
250 | if (uamp >= 7500 && uamp < 10000) | |
251 | current_bits = 0x0; | |
252 | else if (uamp <= 50000) { | |
253 | /* <5000, 7499> and <10000, 50000> */ | |
254 | current_bits = uamp / 5000; | |
255 | } else { | |
256 | uamp = min(uamp, 100000U) - 50000U; | |
257 | current_bits = 0xa + uamp / 10000; | |
258 | } | |
259 | break; | |
260 | ||
261 | case MAXIM_DEVICE_TYPE_MAX14577: | |
262 | default: | |
263 | if (uamp < MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN) | |
264 | return -EINVAL; /* Requested current is too low */ | |
265 | ||
266 | uamp = min(uamp, MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX); | |
267 | uamp -= MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN; | |
268 | current_bits = uamp / MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP; | |
269 | break; | |
270 | } | |
271 | ||
272 | reg_data = current_bits << CHGCTRL5_EOCS_SHIFT; | |
273 | ||
274 | return max14577_update_reg(chg->max14577->regmap, | |
275 | MAX14577_CHG_REG_CHG_CTRL5, CHGCTRL5_EOCS_MASK, | |
276 | reg_data); | |
277 | } | |
278 | ||
279 | static int max14577_init_fast_charge(struct max14577_charger *chg, | |
280 | unsigned int uamp) | |
281 | { | |
282 | u8 reg_data; | |
283 | int ret; | |
284 | const struct maxim_charger_current *limits = | |
285 | &maxim_charger_currents[chg->max14577->dev_type]; | |
286 | ||
287 | ret = maxim_charger_calc_reg_current(limits, uamp, uamp, ®_data); | |
288 | if (ret) { | |
289 | dev_err(chg->dev, "Wrong value for fast charge: %u\n", uamp); | |
290 | return ret; | |
291 | } | |
292 | ||
293 | return max14577_update_reg(chg->max14577->regmap, | |
294 | MAX14577_CHG_REG_CHG_CTRL4, | |
295 | CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK, | |
296 | reg_data); | |
297 | } | |
298 | ||
55e64701 KK |
299 | /* |
300 | * Sets charger registers to proper and safe default values. | |
301 | * Some of these values are equal to defaults in MAX14577E | |
302 | * data sheet but there are minor differences. | |
303 | */ | |
e30110e9 | 304 | static int max14577_charger_reg_init(struct max14577_charger *chg) |
55e64701 KK |
305 | { |
306 | struct regmap *rmap = chg->max14577->regmap; | |
307 | u8 reg_data; | |
e30110e9 | 308 | int ret; |
55e64701 KK |
309 | |
310 | /* | |
311 | * Charger-Type Manual Detection, default off (set CHGTYPMAN to 0) | |
312 | * Charger-Detection Enable, default on (set CHGDETEN to 1) | |
313 | * Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit | |
314 | */ | |
315 | reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT; | |
316 | max14577_update_reg(rmap, MAX14577_REG_CDETCTRL1, | |
317 | CDETCTRL1_CHGDETEN_MASK | CDETCTRL1_CHGTYPMAN_MASK, | |
318 | reg_data); | |
319 | ||
55e64701 KK |
320 | /* |
321 | * Wall-Adapter Rapid Charge, default on | |
322 | * Battery-Charger, default on | |
323 | */ | |
324 | reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT; | |
325 | reg_data |= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT; | |
326 | max14577_write_reg(rmap, MAX14577_REG_CHGCTRL2, reg_data); | |
327 | ||
55e64701 KK |
328 | /* Auto Charging Stop, default off */ |
329 | reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT; | |
330 | max14577_write_reg(rmap, MAX14577_REG_CHGCTRL6, reg_data); | |
331 | ||
e30110e9 KK |
332 | ret = max14577_init_constant_voltage(chg, chg->pdata->constant_uvolt); |
333 | if (ret) | |
334 | return ret; | |
335 | ||
336 | ret = max14577_init_eoc(chg, chg->pdata->eoc_uamp); | |
337 | if (ret) | |
338 | return ret; | |
339 | ||
340 | ret = max14577_init_fast_charge(chg, chg->pdata->fast_charge_uamp); | |
341 | if (ret) | |
342 | return ret; | |
343 | ||
344 | ret = max14577_set_fast_charge_timer(chg, | |
345 | MAXIM_CHARGER_FAST_CHARGE_TIMER_DEFAULT); | |
346 | if (ret) | |
347 | return ret; | |
348 | ||
349 | /* Initialize Overvoltage-Protection Threshold */ | |
350 | switch (chg->pdata->ovp_uvolt) { | |
351 | case 7500000: | |
352 | reg_data = 0x0; | |
353 | break; | |
354 | case 6000000: | |
355 | case 6500000: | |
356 | case 7000000: | |
357 | reg_data = 0x1 + (chg->pdata->ovp_uvolt - 6000000) / 500000; | |
358 | break; | |
359 | default: | |
360 | dev_err(chg->dev, "Wrong value for OVP: %u\n", | |
361 | chg->pdata->ovp_uvolt); | |
362 | return -EINVAL; | |
363 | } | |
364 | reg_data <<= CHGCTRL7_OTPCGHCVS_SHIFT; | |
55e64701 | 365 | max14577_write_reg(rmap, MAX14577_REG_CHGCTRL7, reg_data); |
e30110e9 KK |
366 | |
367 | return 0; | |
55e64701 KK |
368 | } |
369 | ||
370 | /* Support property from charger */ | |
371 | static enum power_supply_property max14577_charger_props[] = { | |
372 | POWER_SUPPLY_PROP_STATUS, | |
373 | POWER_SUPPLY_PROP_CHARGE_TYPE, | |
374 | POWER_SUPPLY_PROP_HEALTH, | |
375 | POWER_SUPPLY_PROP_PRESENT, | |
376 | POWER_SUPPLY_PROP_ONLINE, | |
377 | POWER_SUPPLY_PROP_MODEL_NAME, | |
378 | POWER_SUPPLY_PROP_MANUFACTURER, | |
379 | }; | |
380 | ||
3682a8ee KK |
381 | static const char * const model_names[] = { |
382 | [MAXIM_DEVICE_TYPE_UNKNOWN] = "MAX14577-like", | |
383 | [MAXIM_DEVICE_TYPE_MAX14577] = "MAX14577", | |
384 | [MAXIM_DEVICE_TYPE_MAX77836] = "MAX77836", | |
385 | }; | |
55e64701 KK |
386 | static const char *manufacturer = "Maxim Integrated"; |
387 | ||
388 | static int max14577_charger_get_property(struct power_supply *psy, | |
389 | enum power_supply_property psp, | |
390 | union power_supply_propval *val) | |
391 | { | |
392 | struct max14577_charger *chg = container_of(psy, | |
393 | struct max14577_charger, | |
394 | charger); | |
395 | int ret = 0; | |
396 | ||
397 | switch (psp) { | |
398 | case POWER_SUPPLY_PROP_STATUS: | |
399 | val->intval = max14577_get_charger_state(chg); | |
400 | break; | |
401 | case POWER_SUPPLY_PROP_CHARGE_TYPE: | |
402 | val->intval = max14577_get_charge_type(chg); | |
403 | break; | |
404 | case POWER_SUPPLY_PROP_HEALTH: | |
405 | val->intval = max14577_get_battery_health(chg); | |
406 | break; | |
407 | case POWER_SUPPLY_PROP_PRESENT: | |
408 | val->intval = max14577_get_present(chg); | |
409 | break; | |
410 | case POWER_SUPPLY_PROP_ONLINE: | |
411 | val->intval = max14577_get_online(chg); | |
412 | break; | |
413 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
3682a8ee KK |
414 | BUILD_BUG_ON(ARRAY_SIZE(model_names) != MAXIM_DEVICE_TYPE_NUM); |
415 | val->strval = model_names[chg->max14577->dev_type]; | |
55e64701 KK |
416 | break; |
417 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
418 | val->strval = manufacturer; | |
419 | break; | |
420 | default: | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | return ret; | |
425 | } | |
426 | ||
e30110e9 KK |
427 | #ifdef CONFIG_OF |
428 | static struct max14577_charger_platform_data *max14577_charger_dt_init( | |
429 | struct platform_device *pdev) | |
430 | { | |
431 | struct max14577_charger_platform_data *pdata; | |
432 | struct device_node *np = pdev->dev.of_node; | |
433 | int ret; | |
434 | ||
435 | if (!np) { | |
436 | dev_err(&pdev->dev, "No charger OF node\n"); | |
437 | return ERR_PTR(-EINVAL); | |
438 | } | |
439 | ||
440 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
441 | if (!pdata) | |
442 | return ERR_PTR(-ENOMEM); | |
443 | ||
444 | ret = of_property_read_u32(np, "maxim,constant-uvolt", | |
445 | &pdata->constant_uvolt); | |
446 | if (ret) { | |
447 | dev_err(&pdev->dev, "Cannot parse maxim,constant-uvolt field from DT\n"); | |
448 | return ERR_PTR(ret); | |
449 | } | |
450 | ||
451 | ret = of_property_read_u32(np, "maxim,fast-charge-uamp", | |
452 | &pdata->fast_charge_uamp); | |
453 | if (ret) { | |
454 | dev_err(&pdev->dev, "Cannot parse maxim,fast-charge-uamp field from DT\n"); | |
455 | return ERR_PTR(ret); | |
456 | } | |
457 | ||
458 | ret = of_property_read_u32(np, "maxim,eoc-uamp", &pdata->eoc_uamp); | |
459 | if (ret) { | |
460 | dev_err(&pdev->dev, "Cannot parse maxim,eoc-uamp field from DT\n"); | |
461 | return ERR_PTR(ret); | |
462 | } | |
463 | ||
464 | ret = of_property_read_u32(np, "maxim,ovp-uvolt", &pdata->ovp_uvolt); | |
465 | if (ret) { | |
466 | dev_err(&pdev->dev, "Cannot parse maxim,ovp-uvolt field from DT\n"); | |
467 | return ERR_PTR(ret); | |
468 | } | |
469 | ||
470 | return pdata; | |
471 | } | |
472 | #else /* CONFIG_OF */ | |
473 | static struct max14577_charger_platform_data *max14577_charger_dt_init( | |
474 | struct platform_device *pdev) | |
475 | { | |
476 | return NULL; | |
477 | } | |
478 | #endif /* CONFIG_OF */ | |
479 | ||
480 | static ssize_t show_fast_charge_timer(struct device *dev, | |
481 | struct device_attribute *attr, char *buf) | |
482 | { | |
483 | struct max14577_charger *chg = dev_get_drvdata(dev); | |
484 | u8 reg_data; | |
485 | int ret; | |
486 | unsigned int val; | |
487 | ||
488 | ret = max14577_read_reg(chg->max14577->regmap, MAX14577_REG_CHGCTRL1, | |
489 | ®_data); | |
490 | if (ret) | |
491 | return ret; | |
492 | ||
493 | reg_data &= CHGCTRL1_TCHW_MASK; | |
494 | reg_data >>= CHGCTRL1_TCHW_SHIFT; | |
495 | switch (reg_data) { | |
496 | case 0x2 ... 0x4: | |
497 | val = reg_data + 3; | |
498 | break; | |
499 | case 0x7: | |
500 | val = 0; | |
501 | break; | |
502 | default: | |
503 | val = 5; | |
504 | break; | |
505 | } | |
506 | ||
507 | return scnprintf(buf, PAGE_SIZE, "%u\n", val); | |
508 | } | |
509 | ||
510 | static ssize_t store_fast_charge_timer(struct device *dev, | |
511 | struct device_attribute *attr, const char *buf, size_t count) | |
512 | { | |
513 | struct max14577_charger *chg = dev_get_drvdata(dev); | |
514 | unsigned long val; | |
515 | int ret; | |
516 | ||
517 | ret = kstrtoul(buf, 10, &val); | |
518 | if (ret) | |
519 | return ret; | |
520 | ||
521 | ret = max14577_set_fast_charge_timer(chg, val); | |
522 | if (ret) | |
523 | return ret; | |
524 | ||
525 | return count; | |
526 | } | |
527 | ||
528 | static DEVICE_ATTR(fast_charge_timer, S_IRUGO | S_IWUSR, | |
529 | show_fast_charge_timer, store_fast_charge_timer); | |
530 | ||
55e64701 KK |
531 | static int max14577_charger_probe(struct platform_device *pdev) |
532 | { | |
533 | struct max14577_charger *chg; | |
534 | struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); | |
535 | int ret; | |
536 | ||
537 | chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL); | |
538 | if (!chg) | |
539 | return -ENOMEM; | |
540 | ||
541 | platform_set_drvdata(pdev, chg); | |
542 | chg->dev = &pdev->dev; | |
543 | chg->max14577 = max14577; | |
544 | ||
e30110e9 KK |
545 | chg->pdata = max14577_charger_dt_init(pdev); |
546 | if (IS_ERR_OR_NULL(chg->pdata)) | |
547 | return PTR_ERR(chg->pdata); | |
548 | ||
549 | ret = max14577_charger_reg_init(chg); | |
550 | if (ret) | |
551 | return ret; | |
55e64701 KK |
552 | |
553 | chg->charger.name = "max14577-charger", | |
554 | chg->charger.type = POWER_SUPPLY_TYPE_BATTERY, | |
555 | chg->charger.properties = max14577_charger_props, | |
556 | chg->charger.num_properties = ARRAY_SIZE(max14577_charger_props), | |
557 | chg->charger.get_property = max14577_charger_get_property, | |
558 | ||
e30110e9 KK |
559 | ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer); |
560 | if (ret) { | |
561 | dev_err(&pdev->dev, "failed: create sysfs entry\n"); | |
562 | return ret; | |
563 | } | |
564 | ||
55e64701 KK |
565 | ret = power_supply_register(&pdev->dev, &chg->charger); |
566 | if (ret) { | |
567 | dev_err(&pdev->dev, "failed: power supply register\n"); | |
e30110e9 | 568 | goto err; |
55e64701 KK |
569 | } |
570 | ||
e30110e9 KK |
571 | /* Check for valid values for charger */ |
572 | BUILD_BUG_ON(MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN + | |
573 | MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP * 0xf != | |
574 | MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX); | |
55e64701 | 575 | return 0; |
e30110e9 KK |
576 | |
577 | err: | |
578 | device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer); | |
579 | ||
580 | return ret; | |
55e64701 KK |
581 | } |
582 | ||
583 | static int max14577_charger_remove(struct platform_device *pdev) | |
584 | { | |
585 | struct max14577_charger *chg = platform_get_drvdata(pdev); | |
586 | ||
e30110e9 | 587 | device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer); |
55e64701 KK |
588 | power_supply_unregister(&chg->charger); |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
3682a8ee KK |
593 | static const struct platform_device_id max14577_charger_id[] = { |
594 | { "max14577-charger", MAXIM_DEVICE_TYPE_MAX14577, }, | |
595 | { "max77836-charger", MAXIM_DEVICE_TYPE_MAX77836, }, | |
596 | { } | |
597 | }; | |
598 | MODULE_DEVICE_TABLE(platform, max14577_charger_id); | |
599 | ||
55e64701 KK |
600 | static struct platform_driver max14577_charger_driver = { |
601 | .driver = { | |
55e64701 KK |
602 | .name = "max14577-charger", |
603 | }, | |
604 | .probe = max14577_charger_probe, | |
605 | .remove = max14577_charger_remove, | |
3682a8ee | 606 | .id_table = max14577_charger_id, |
55e64701 KK |
607 | }; |
608 | module_platform_driver(max14577_charger_driver); | |
609 | ||
610 | MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>"); | |
3682a8ee | 611 | MODULE_DESCRIPTION("Maxim 14577/77836 charger driver"); |
55e64701 | 612 | MODULE_LICENSE("GPL"); |