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1f855824 AM |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2012 | |
3 | * | |
4 | * Battery temperature driver for AB8500 | |
5 | * | |
6 | * License Terms: GNU General Public License v2 | |
7 | * Author: | |
8 | * Johan Palsson <johan.palsson@stericsson.com> | |
9 | * Karl Komierowski <karl.komierowski@stericsson.com> | |
10 | * Arun R Murthy <arun.murthy@stericsson.com> | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/power_supply.h> | |
21 | #include <linux/completion.h> | |
22 | #include <linux/workqueue.h> | |
bd9e8ab2 R |
23 | #include <linux/jiffies.h> |
24 | #include <linux/of.h> | |
25 | #include <linux/mfd/core.h> | |
1f855824 | 26 | #include <linux/mfd/abx500.h> |
bd9e8ab2 | 27 | #include <linux/mfd/abx500/ab8500.h> |
1f855824 AM |
28 | #include <linux/mfd/abx500/ab8500-bm.h> |
29 | #include <linux/mfd/abx500/ab8500-gpadc.h> | |
1f855824 AM |
30 | |
31 | #define VTVOUT_V 1800 | |
32 | ||
33 | #define BTEMP_THERMAL_LOW_LIMIT -10 | |
34 | #define BTEMP_THERMAL_MED_LIMIT 0 | |
35 | #define BTEMP_THERMAL_HIGH_LIMIT_52 52 | |
36 | #define BTEMP_THERMAL_HIGH_LIMIT_57 57 | |
37 | #define BTEMP_THERMAL_HIGH_LIMIT_62 62 | |
38 | ||
39 | #define BTEMP_BATCTRL_CURR_SRC_7UA 7 | |
40 | #define BTEMP_BATCTRL_CURR_SRC_20UA 20 | |
41 | ||
e6aac611 MJ |
42 | #define BTEMP_BATCTRL_CURR_SRC_16UA 16 |
43 | #define BTEMP_BATCTRL_CURR_SRC_18UA 18 | |
44 | ||
1f855824 AM |
45 | #define to_ab8500_btemp_device_info(x) container_of((x), \ |
46 | struct ab8500_btemp, btemp_psy); | |
47 | ||
48 | /** | |
49 | * struct ab8500_btemp_interrupts - ab8500 interrupts | |
50 | * @name: name of the interrupt | |
51 | * @isr function pointer to the isr | |
52 | */ | |
53 | struct ab8500_btemp_interrupts { | |
54 | char *name; | |
55 | irqreturn_t (*isr)(int irq, void *data); | |
56 | }; | |
57 | ||
58 | struct ab8500_btemp_events { | |
59 | bool batt_rem; | |
60 | bool btemp_high; | |
61 | bool btemp_medhigh; | |
62 | bool btemp_lowmed; | |
63 | bool btemp_low; | |
64 | bool ac_conn; | |
65 | bool usb_conn; | |
66 | }; | |
67 | ||
68 | struct ab8500_btemp_ranges { | |
69 | int btemp_high_limit; | |
70 | int btemp_med_limit; | |
71 | int btemp_low_limit; | |
72 | }; | |
73 | ||
74 | /** | |
75 | * struct ab8500_btemp - ab8500 BTEMP device information | |
76 | * @dev: Pointer to the structure device | |
77 | * @node: List of AB8500 BTEMPs, hence prepared for reentrance | |
78 | * @curr_source: What current source we use, in uA | |
908fe8d6 HB |
79 | * @bat_temp: Dispatched battery temperature in degree Celcius |
80 | * @prev_bat_temp Last measured battery temperature in degree Celcius | |
1f855824 AM |
81 | * @parent: Pointer to the struct ab8500 |
82 | * @gpadc: Pointer to the struct gpadc | |
83 | * @fg: Pointer to the struct fg | |
b0284de0 | 84 | * @bm: Platform specific battery management information |
1f855824 AM |
85 | * @btemp_psy: Structure for BTEMP specific battery properties |
86 | * @events: Structure for information about events triggered | |
87 | * @btemp_ranges: Battery temperature range structure | |
88 | * @btemp_wq: Work queue for measuring the temperature periodically | |
89 | * @btemp_periodic_work: Work for measuring the temperature periodically | |
f6271b4f | 90 | * @initialized: True if battery id read. |
1f855824 AM |
91 | */ |
92 | struct ab8500_btemp { | |
93 | struct device *dev; | |
94 | struct list_head node; | |
95 | int curr_source; | |
96 | int bat_temp; | |
97 | int prev_bat_temp; | |
98 | struct ab8500 *parent; | |
99 | struct ab8500_gpadc *gpadc; | |
100 | struct ab8500_fg *fg; | |
b0284de0 | 101 | struct abx500_bm_data *bm; |
1f855824 AM |
102 | struct power_supply btemp_psy; |
103 | struct ab8500_btemp_events events; | |
104 | struct ab8500_btemp_ranges btemp_ranges; | |
105 | struct workqueue_struct *btemp_wq; | |
106 | struct delayed_work btemp_periodic_work; | |
f6271b4f | 107 | bool initialized; |
1f855824 AM |
108 | }; |
109 | ||
110 | /* BTEMP power supply properties */ | |
111 | static enum power_supply_property ab8500_btemp_props[] = { | |
112 | POWER_SUPPLY_PROP_PRESENT, | |
113 | POWER_SUPPLY_PROP_ONLINE, | |
114 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
115 | POWER_SUPPLY_PROP_TEMP, | |
116 | }; | |
117 | ||
118 | static LIST_HEAD(ab8500_btemp_list); | |
119 | ||
120 | /** | |
121 | * ab8500_btemp_get() - returns a reference to the primary AB8500 BTEMP | |
122 | * (i.e. the first BTEMP in the instance list) | |
123 | */ | |
124 | struct ab8500_btemp *ab8500_btemp_get(void) | |
125 | { | |
126 | struct ab8500_btemp *btemp; | |
127 | btemp = list_first_entry(&ab8500_btemp_list, struct ab8500_btemp, node); | |
128 | ||
129 | return btemp; | |
130 | } | |
131 | ||
132 | /** | |
133 | * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance | |
134 | * @di: pointer to the ab8500_btemp structure | |
135 | * @v_batctrl: measured batctrl voltage | |
136 | * @inst_curr: measured instant current | |
137 | * | |
138 | * This function returns the battery resistance that is | |
139 | * derived from the BATCTRL voltage. | |
140 | * Returns value in Ohms. | |
141 | */ | |
142 | static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, | |
143 | int v_batctrl, int inst_curr) | |
144 | { | |
145 | int rbs; | |
146 | ||
147 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
148 | /* | |
149 | * For ABB cut1.0 and 1.1 BAT_CTRL is internally | |
150 | * connected to 1.8V through a 450k resistor | |
151 | */ | |
152 | return (450000 * (v_batctrl)) / (1800 - v_batctrl); | |
153 | } | |
154 | ||
b0284de0 | 155 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL) { |
1f855824 AM |
156 | /* |
157 | * If the battery has internal NTC, we use the current | |
158 | * source to calculate the resistance, 7uA or 20uA | |
159 | */ | |
160 | rbs = (v_batctrl * 1000 | |
b0284de0 | 161 | - di->bm->gnd_lift_resistance * inst_curr) |
1f855824 AM |
162 | / di->curr_source; |
163 | } else { | |
164 | /* | |
165 | * BAT_CTRL is internally | |
166 | * connected to 1.8V through a 80k resistor | |
167 | */ | |
168 | rbs = (80000 * (v_batctrl)) / (1800 - v_batctrl); | |
169 | } | |
170 | ||
171 | return rbs; | |
172 | } | |
173 | ||
174 | /** | |
175 | * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage | |
176 | * @di: pointer to the ab8500_btemp structure | |
177 | * | |
178 | * This function returns the voltage on BATCTRL. Returns value in mV. | |
179 | */ | |
180 | static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) | |
181 | { | |
182 | int vbtemp; | |
183 | static int prev; | |
184 | ||
185 | vbtemp = ab8500_gpadc_convert(di->gpadc, BAT_CTRL); | |
186 | if (vbtemp < 0) { | |
187 | dev_err(di->dev, | |
188 | "%s gpadc conversion failed, using previous value", | |
189 | __func__); | |
190 | return prev; | |
191 | } | |
192 | prev = vbtemp; | |
193 | return vbtemp; | |
194 | } | |
195 | ||
196 | /** | |
197 | * ab8500_btemp_curr_source_enable() - enable/disable batctrl current source | |
198 | * @di: pointer to the ab8500_btemp structure | |
199 | * @enable: enable or disable the current source | |
200 | * | |
201 | * Enable or disable the current sources for the BatCtrl AD channel | |
202 | */ | |
203 | static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di, | |
204 | bool enable) | |
205 | { | |
206 | int curr; | |
207 | int ret = 0; | |
208 | ||
209 | /* | |
210 | * BATCTRL current sources are included on AB8500 cut2.0 | |
211 | * and future versions | |
212 | */ | |
213 | if (is_ab8500_1p1_or_earlier(di->parent)) | |
214 | return 0; | |
215 | ||
216 | /* Only do this for batteries with internal NTC */ | |
b0284de0 | 217 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && enable) { |
e6aac611 MJ |
218 | |
219 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
220 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_16UA) | |
221 | curr = BAT_CTRL_16U_ENA; | |
222 | else | |
223 | curr = BAT_CTRL_18U_ENA; | |
224 | } else { | |
225 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_7UA) | |
226 | curr = BAT_CTRL_7U_ENA; | |
227 | else | |
228 | curr = BAT_CTRL_20U_ENA; | |
229 | } | |
1f855824 AM |
230 | |
231 | dev_dbg(di->dev, "Set BATCTRL %duA\n", di->curr_source); | |
232 | ||
233 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
234 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
235 | FORCE_BAT_CTRL_CMP_HIGH, FORCE_BAT_CTRL_CMP_HIGH); | |
236 | if (ret) { | |
237 | dev_err(di->dev, "%s failed setting cmp_force\n", | |
238 | __func__); | |
239 | return ret; | |
240 | } | |
241 | ||
242 | /* | |
243 | * We have to wait one 32kHz cycle before enabling | |
244 | * the current source, since ForceBatCtrlCmpHigh needs | |
245 | * to be written in a separate cycle | |
246 | */ | |
247 | udelay(32); | |
248 | ||
249 | ret = abx500_set_register_interruptible(di->dev, | |
250 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
251 | FORCE_BAT_CTRL_CMP_HIGH | curr); | |
252 | if (ret) { | |
253 | dev_err(di->dev, "%s failed enabling current source\n", | |
254 | __func__); | |
255 | goto disable_curr_source; | |
256 | } | |
b0284de0 | 257 | } else if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && !enable) { |
1f855824 AM |
258 | dev_dbg(di->dev, "Disable BATCTRL curr source\n"); |
259 | ||
e6aac611 MJ |
260 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) { |
261 | /* Write 0 to the curr bits */ | |
262 | ret = abx500_mask_and_set_register_interruptible( | |
263 | di->dev, | |
264 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
265 | BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA, | |
266 | ~(BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA)); | |
267 | } else { | |
268 | /* Write 0 to the curr bits */ | |
269 | ret = abx500_mask_and_set_register_interruptible( | |
270 | di->dev, | |
271 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
272 | BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, | |
273 | ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); | |
274 | } | |
275 | ||
1f855824 AM |
276 | if (ret) { |
277 | dev_err(di->dev, "%s failed disabling current source\n", | |
278 | __func__); | |
279 | goto disable_curr_source; | |
280 | } | |
281 | ||
282 | /* Enable Pull-Up and comparator */ | |
283 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
284 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
285 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, | |
286 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); | |
287 | if (ret) { | |
288 | dev_err(di->dev, "%s failed enabling PU and comp\n", | |
289 | __func__); | |
290 | goto enable_pu_comp; | |
291 | } | |
292 | ||
293 | /* | |
294 | * We have to wait one 32kHz cycle before disabling | |
295 | * ForceBatCtrlCmpHigh since this needs to be written | |
296 | * in a separate cycle | |
297 | */ | |
298 | udelay(32); | |
299 | ||
300 | /* Disable 'force comparator' */ | |
301 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
302 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
303 | FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); | |
304 | if (ret) { | |
305 | dev_err(di->dev, "%s failed disabling force comp\n", | |
306 | __func__); | |
307 | goto disable_force_comp; | |
308 | } | |
309 | } | |
310 | return ret; | |
311 | ||
312 | /* | |
313 | * We have to try unsetting FORCE_BAT_CTRL_CMP_HIGH one more time | |
314 | * if we got an error above | |
315 | */ | |
316 | disable_curr_source: | |
e6aac611 MJ |
317 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) { |
318 | /* Write 0 to the curr bits */ | |
319 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
320 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
321 | BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA, | |
322 | ~(BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA)); | |
323 | } else { | |
324 | /* Write 0 to the curr bits */ | |
325 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1f855824 AM |
326 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, |
327 | BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, | |
328 | ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); | |
e6aac611 MJ |
329 | } |
330 | ||
1f855824 AM |
331 | if (ret) { |
332 | dev_err(di->dev, "%s failed disabling current source\n", | |
333 | __func__); | |
334 | return ret; | |
335 | } | |
336 | enable_pu_comp: | |
337 | /* Enable Pull-Up and comparator */ | |
338 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
339 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
340 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, | |
341 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); | |
342 | if (ret) { | |
343 | dev_err(di->dev, "%s failed enabling PU and comp\n", | |
344 | __func__); | |
345 | return ret; | |
346 | } | |
347 | ||
348 | disable_force_comp: | |
349 | /* | |
350 | * We have to wait one 32kHz cycle before disabling | |
351 | * ForceBatCtrlCmpHigh since this needs to be written | |
352 | * in a separate cycle | |
353 | */ | |
354 | udelay(32); | |
355 | ||
356 | /* Disable 'force comparator' */ | |
357 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
358 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
359 | FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); | |
360 | if (ret) { | |
361 | dev_err(di->dev, "%s failed disabling force comp\n", | |
362 | __func__); | |
363 | return ret; | |
364 | } | |
365 | ||
366 | return ret; | |
367 | } | |
368 | ||
369 | /** | |
370 | * ab8500_btemp_get_batctrl_res() - get battery resistance | |
371 | * @di: pointer to the ab8500_btemp structure | |
372 | * | |
373 | * This function returns the battery pack identification resistance. | |
374 | * Returns value in Ohms. | |
375 | */ | |
376 | static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) | |
377 | { | |
378 | int ret; | |
379 | int batctrl = 0; | |
380 | int res; | |
381 | int inst_curr; | |
382 | int i; | |
383 | ||
384 | /* | |
385 | * BATCTRL current sources are included on AB8500 cut2.0 | |
386 | * and future versions | |
387 | */ | |
388 | ret = ab8500_btemp_curr_source_enable(di, true); | |
389 | if (ret) { | |
390 | dev_err(di->dev, "%s curr source enabled failed\n", __func__); | |
391 | return ret; | |
392 | } | |
393 | ||
394 | if (!di->fg) | |
395 | di->fg = ab8500_fg_get(); | |
396 | if (!di->fg) { | |
397 | dev_err(di->dev, "No fg found\n"); | |
398 | return -EINVAL; | |
399 | } | |
400 | ||
401 | ret = ab8500_fg_inst_curr_start(di->fg); | |
402 | ||
403 | if (ret) { | |
404 | dev_err(di->dev, "Failed to start current measurement\n"); | |
405 | return ret; | |
406 | } | |
407 | ||
3988a4df JB |
408 | do { |
409 | msleep(20); | |
410 | } while (!ab8500_fg_inst_curr_started(di->fg)); | |
411 | ||
1f855824 AM |
412 | i = 0; |
413 | ||
414 | do { | |
415 | batctrl += ab8500_btemp_read_batctrl_voltage(di); | |
416 | i++; | |
417 | msleep(20); | |
418 | } while (!ab8500_fg_inst_curr_done(di->fg)); | |
419 | batctrl /= i; | |
420 | ||
421 | ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); | |
422 | if (ret) { | |
423 | dev_err(di->dev, "Failed to finalize current measurement\n"); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); | |
428 | ||
429 | ret = ab8500_btemp_curr_source_enable(di, false); | |
430 | if (ret) { | |
431 | dev_err(di->dev, "%s curr source disable failed\n", __func__); | |
432 | return ret; | |
433 | } | |
434 | ||
435 | dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", | |
436 | __func__, batctrl, res, inst_curr, i); | |
437 | ||
438 | return res; | |
439 | } | |
440 | ||
441 | /** | |
442 | * ab8500_btemp_res_to_temp() - resistance to temperature | |
443 | * @di: pointer to the ab8500_btemp structure | |
444 | * @tbl: pointer to the resiatance to temperature table | |
445 | * @tbl_size: size of the resistance to temperature table | |
446 | * @res: resistance to calculate the temperature from | |
447 | * | |
448 | * This function returns the battery temperature in degrees Celcius | |
449 | * based on the NTC resistance. | |
450 | */ | |
451 | static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di, | |
452 | const struct abx500_res_to_temp *tbl, int tbl_size, int res) | |
453 | { | |
454 | int i, temp; | |
455 | /* | |
456 | * Calculate the formula for the straight line | |
457 | * Simple interpolation if we are within | |
458 | * the resistance table limits, extrapolate | |
459 | * if resistance is outside the limits. | |
460 | */ | |
461 | if (res > tbl[0].resist) | |
462 | i = 0; | |
463 | else if (res <= tbl[tbl_size - 1].resist) | |
464 | i = tbl_size - 2; | |
465 | else { | |
466 | i = 0; | |
467 | while (!(res <= tbl[i].resist && | |
468 | res > tbl[i + 1].resist)) | |
469 | i++; | |
470 | } | |
471 | ||
472 | temp = tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) * | |
473 | (res - tbl[i].resist)) / (tbl[i + 1].resist - tbl[i].resist); | |
474 | return temp; | |
475 | } | |
476 | ||
477 | /** | |
478 | * ab8500_btemp_measure_temp() - measure battery temperature | |
479 | * @di: pointer to the ab8500_btemp structure | |
480 | * | |
481 | * Returns battery temperature (on success) else the previous temperature | |
482 | */ | |
483 | static int ab8500_btemp_measure_temp(struct ab8500_btemp *di) | |
484 | { | |
485 | int temp; | |
486 | static int prev; | |
487 | int rbat, rntc, vntc; | |
488 | u8 id; | |
489 | ||
b0284de0 | 490 | id = di->bm->batt_id; |
1f855824 | 491 | |
b0284de0 | 492 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && |
1f855824 AM |
493 | id != BATTERY_UNKNOWN) { |
494 | ||
495 | rbat = ab8500_btemp_get_batctrl_res(di); | |
496 | if (rbat < 0) { | |
497 | dev_err(di->dev, "%s get batctrl res failed\n", | |
498 | __func__); | |
499 | /* | |
500 | * Return out-of-range temperature so that | |
501 | * charging is stopped | |
502 | */ | |
503 | return BTEMP_THERMAL_LOW_LIMIT; | |
504 | } | |
505 | ||
506 | temp = ab8500_btemp_res_to_temp(di, | |
b0284de0 LJ |
507 | di->bm->bat_type[id].r_to_t_tbl, |
508 | di->bm->bat_type[id].n_temp_tbl_elements, rbat); | |
1f855824 AM |
509 | } else { |
510 | vntc = ab8500_gpadc_convert(di->gpadc, BTEMP_BALL); | |
511 | if (vntc < 0) { | |
512 | dev_err(di->dev, | |
513 | "%s gpadc conversion failed," | |
514 | " using previous value\n", __func__); | |
515 | return prev; | |
516 | } | |
517 | /* | |
518 | * The PCB NTC is sourced from VTVOUT via a 230kOhm | |
519 | * resistor. | |
520 | */ | |
521 | rntc = 230000 * vntc / (VTVOUT_V - vntc); | |
522 | ||
523 | temp = ab8500_btemp_res_to_temp(di, | |
b0284de0 LJ |
524 | di->bm->bat_type[id].r_to_t_tbl, |
525 | di->bm->bat_type[id].n_temp_tbl_elements, rntc); | |
1f855824 AM |
526 | prev = temp; |
527 | } | |
528 | dev_dbg(di->dev, "Battery temperature is %d\n", temp); | |
529 | return temp; | |
530 | } | |
531 | ||
532 | /** | |
533 | * ab8500_btemp_id() - Identify the connected battery | |
534 | * @di: pointer to the ab8500_btemp structure | |
535 | * | |
536 | * This function will try to identify the battery by reading the ID | |
537 | * resistor. Some brands use a combined ID resistor with a NTC resistor to | |
538 | * both be able to identify and to read the temperature of it. | |
539 | */ | |
540 | static int ab8500_btemp_id(struct ab8500_btemp *di) | |
541 | { | |
542 | int res; | |
543 | u8 i; | |
e6aac611 MJ |
544 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) |
545 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA; | |
546 | else | |
547 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; | |
1f855824 | 548 | |
b0284de0 | 549 | di->bm->batt_id = BATTERY_UNKNOWN; |
1f855824 AM |
550 | |
551 | res = ab8500_btemp_get_batctrl_res(di); | |
552 | if (res < 0) { | |
553 | dev_err(di->dev, "%s get batctrl res failed\n", __func__); | |
554 | return -ENXIO; | |
555 | } | |
556 | ||
557 | /* BATTERY_UNKNOWN is defined on position 0, skip it! */ | |
b0284de0 LJ |
558 | for (i = BATTERY_UNKNOWN + 1; i < di->bm->n_btypes; i++) { |
559 | if ((res <= di->bm->bat_type[i].resis_high) && | |
560 | (res >= di->bm->bat_type[i].resis_low)) { | |
1f855824 AM |
561 | dev_dbg(di->dev, "Battery detected on %s" |
562 | " low %d < res %d < high: %d" | |
563 | " index: %d\n", | |
b0284de0 | 564 | di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL ? |
1f855824 | 565 | "BATCTRL" : "BATTEMP", |
b0284de0 LJ |
566 | di->bm->bat_type[i].resis_low, res, |
567 | di->bm->bat_type[i].resis_high, i); | |
1f855824 | 568 | |
b0284de0 | 569 | di->bm->batt_id = i; |
1f855824 AM |
570 | break; |
571 | } | |
572 | } | |
573 | ||
b0284de0 | 574 | if (di->bm->batt_id == BATTERY_UNKNOWN) { |
1f855824 AM |
575 | dev_warn(di->dev, "Battery identified as unknown" |
576 | ", resistance %d Ohm\n", res); | |
577 | return -ENXIO; | |
578 | } | |
579 | ||
580 | /* | |
581 | * We only have to change current source if the | |
582 | * detected type is Type 1, else we use the 7uA source | |
583 | */ | |
b0284de0 LJ |
584 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && |
585 | di->bm->batt_id == 1) { | |
e6aac611 MJ |
586 | if (is_ab9540(di->parent) || is_ab8505(di->parent)) { |
587 | dev_dbg(di->dev, "Set BATCTRL current source to 16uA\n"); | |
588 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA; | |
589 | } else { | |
590 | dev_dbg(di->dev, "Set BATCTRL current source to 20uA\n"); | |
591 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_20UA; | |
592 | } | |
1f855824 AM |
593 | } |
594 | ||
b0284de0 | 595 | return di->bm->batt_id; |
1f855824 AM |
596 | } |
597 | ||
598 | /** | |
599 | * ab8500_btemp_periodic_work() - Measuring the temperature periodically | |
600 | * @work: pointer to the work_struct structure | |
601 | * | |
602 | * Work function for measuring the temperature periodically | |
603 | */ | |
604 | static void ab8500_btemp_periodic_work(struct work_struct *work) | |
605 | { | |
606 | int interval; | |
908fe8d6 | 607 | int bat_temp; |
1f855824 AM |
608 | struct ab8500_btemp *di = container_of(work, |
609 | struct ab8500_btemp, btemp_periodic_work.work); | |
610 | ||
f6271b4f | 611 | if (!di->initialized) { |
f6271b4f JA |
612 | /* Identify the battery */ |
613 | if (ab8500_btemp_id(di) < 0) | |
614 | dev_warn(di->dev, "failed to identify the battery\n"); | |
615 | } | |
616 | ||
908fe8d6 HB |
617 | bat_temp = ab8500_btemp_measure_temp(di); |
618 | /* | |
619 | * Filter battery temperature. | |
620 | * Allow direct updates on temperature only if two samples result in | |
621 | * same temperature. Else only allow 1 degree change from previous | |
622 | * reported value in the direction of the new measurement. | |
623 | */ | |
2c4c40ac RK |
624 | if ((bat_temp == di->prev_bat_temp) || !di->initialized) { |
625 | if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { | |
626 | di->initialized = true; | |
908fe8d6 HB |
627 | di->bat_temp = bat_temp; |
628 | power_supply_changed(&di->btemp_psy); | |
629 | } | |
630 | } else if (bat_temp < di->prev_bat_temp) { | |
631 | di->bat_temp--; | |
632 | power_supply_changed(&di->btemp_psy); | |
633 | } else if (bat_temp > di->prev_bat_temp) { | |
634 | di->bat_temp++; | |
1f855824 AM |
635 | power_supply_changed(&di->btemp_psy); |
636 | } | |
908fe8d6 | 637 | di->prev_bat_temp = bat_temp; |
1f855824 AM |
638 | |
639 | if (di->events.ac_conn || di->events.usb_conn) | |
b0284de0 | 640 | interval = di->bm->temp_interval_chg; |
1f855824 | 641 | else |
b0284de0 | 642 | interval = di->bm->temp_interval_nochg; |
1f855824 AM |
643 | |
644 | /* Schedule a new measurement */ | |
645 | queue_delayed_work(di->btemp_wq, | |
646 | &di->btemp_periodic_work, | |
647 | round_jiffies(interval * HZ)); | |
648 | } | |
649 | ||
650 | /** | |
651 | * ab8500_btemp_batctrlindb_handler() - battery removal detected | |
652 | * @irq: interrupt number | |
653 | * @_di: void pointer that has to address of ab8500_btemp | |
654 | * | |
655 | * Returns IRQ status(IRQ_HANDLED) | |
656 | */ | |
657 | static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) | |
658 | { | |
659 | struct ab8500_btemp *di = _di; | |
660 | dev_err(di->dev, "Battery removal detected!\n"); | |
661 | ||
662 | di->events.batt_rem = true; | |
663 | power_supply_changed(&di->btemp_psy); | |
664 | ||
665 | return IRQ_HANDLED; | |
666 | } | |
667 | ||
668 | /** | |
669 | * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees | |
670 | * @irq: interrupt number | |
671 | * @_di: void pointer that has to address of ab8500_btemp | |
672 | * | |
673 | * Returns IRQ status(IRQ_HANDLED) | |
674 | */ | |
675 | static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) | |
676 | { | |
677 | struct ab8500_btemp *di = _di; | |
678 | ||
d36e3e6d | 679 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 | 680 | dev_dbg(di->dev, "Ignore false btemp low irq" |
d36e3e6d | 681 | " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); |
1f855824 AM |
682 | } else { |
683 | dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); | |
684 | ||
685 | di->events.btemp_low = true; | |
686 | di->events.btemp_high = false; | |
687 | di->events.btemp_medhigh = false; | |
688 | di->events.btemp_lowmed = false; | |
689 | power_supply_changed(&di->btemp_psy); | |
690 | } | |
691 | ||
692 | return IRQ_HANDLED; | |
693 | } | |
694 | ||
695 | /** | |
696 | * ab8500_btemp_temphigh_handler() - battery temp higher than max temp | |
697 | * @irq: interrupt number | |
698 | * @_di: void pointer that has to address of ab8500_btemp | |
699 | * | |
700 | * Returns IRQ status(IRQ_HANDLED) | |
701 | */ | |
702 | static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) | |
703 | { | |
704 | struct ab8500_btemp *di = _di; | |
705 | ||
706 | dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); | |
707 | ||
708 | di->events.btemp_high = true; | |
709 | di->events.btemp_medhigh = false; | |
710 | di->events.btemp_lowmed = false; | |
711 | di->events.btemp_low = false; | |
712 | power_supply_changed(&di->btemp_psy); | |
713 | ||
714 | return IRQ_HANDLED; | |
715 | } | |
716 | ||
717 | /** | |
718 | * ab8500_btemp_lowmed_handler() - battery temp between low and medium | |
719 | * @irq: interrupt number | |
720 | * @_di: void pointer that has to address of ab8500_btemp | |
721 | * | |
722 | * Returns IRQ status(IRQ_HANDLED) | |
723 | */ | |
724 | static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) | |
725 | { | |
726 | struct ab8500_btemp *di = _di; | |
727 | ||
728 | dev_dbg(di->dev, "Battery temperature is between low and medium\n"); | |
729 | ||
730 | di->events.btemp_lowmed = true; | |
731 | di->events.btemp_medhigh = false; | |
732 | di->events.btemp_high = false; | |
733 | di->events.btemp_low = false; | |
734 | power_supply_changed(&di->btemp_psy); | |
735 | ||
736 | return IRQ_HANDLED; | |
737 | } | |
738 | ||
739 | /** | |
740 | * ab8500_btemp_medhigh_handler() - battery temp between medium and high | |
741 | * @irq: interrupt number | |
742 | * @_di: void pointer that has to address of ab8500_btemp | |
743 | * | |
744 | * Returns IRQ status(IRQ_HANDLED) | |
745 | */ | |
746 | static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) | |
747 | { | |
748 | struct ab8500_btemp *di = _di; | |
749 | ||
750 | dev_dbg(di->dev, "Battery temperature is between medium and high\n"); | |
751 | ||
752 | di->events.btemp_medhigh = true; | |
753 | di->events.btemp_lowmed = false; | |
754 | di->events.btemp_high = false; | |
755 | di->events.btemp_low = false; | |
756 | power_supply_changed(&di->btemp_psy); | |
757 | ||
758 | return IRQ_HANDLED; | |
759 | } | |
760 | ||
761 | /** | |
762 | * ab8500_btemp_periodic() - Periodic temperature measurements | |
763 | * @di: pointer to the ab8500_btemp structure | |
764 | * @enable: enable or disable periodic temperature measurements | |
765 | * | |
766 | * Starts of stops periodic temperature measurements. Periodic measurements | |
767 | * should only be done when a charger is connected. | |
768 | */ | |
769 | static void ab8500_btemp_periodic(struct ab8500_btemp *di, | |
770 | bool enable) | |
771 | { | |
772 | dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", | |
773 | enable); | |
774 | /* | |
775 | * Make sure a new measurement is done directly by cancelling | |
776 | * any pending work | |
777 | */ | |
778 | cancel_delayed_work_sync(&di->btemp_periodic_work); | |
779 | ||
780 | if (enable) | |
781 | queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); | |
782 | } | |
783 | ||
784 | /** | |
785 | * ab8500_btemp_get_temp() - get battery temperature | |
786 | * @di: pointer to the ab8500_btemp structure | |
787 | * | |
788 | * Returns battery temperature | |
789 | */ | |
790 | static int ab8500_btemp_get_temp(struct ab8500_btemp *di) | |
791 | { | |
792 | int temp = 0; | |
793 | ||
794 | /* | |
d36e3e6d | 795 | * The BTEMP events are not reliabe on AB8500 cut3.3 |
1f855824 AM |
796 | * and prior versions |
797 | */ | |
d36e3e6d | 798 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 AM |
799 | temp = di->bat_temp * 10; |
800 | } else { | |
801 | if (di->events.btemp_low) { | |
802 | if (temp > di->btemp_ranges.btemp_low_limit) | |
5b41aa9f | 803 | temp = di->btemp_ranges.btemp_low_limit * 10; |
1f855824 AM |
804 | else |
805 | temp = di->bat_temp * 10; | |
806 | } else if (di->events.btemp_high) { | |
807 | if (temp < di->btemp_ranges.btemp_high_limit) | |
5b41aa9f | 808 | temp = di->btemp_ranges.btemp_high_limit * 10; |
1f855824 AM |
809 | else |
810 | temp = di->bat_temp * 10; | |
811 | } else if (di->events.btemp_lowmed) { | |
812 | if (temp > di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 813 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
814 | else |
815 | temp = di->bat_temp * 10; | |
816 | } else if (di->events.btemp_medhigh) { | |
817 | if (temp < di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 818 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
819 | else |
820 | temp = di->bat_temp * 10; | |
821 | } else | |
822 | temp = di->bat_temp * 10; | |
823 | } | |
824 | return temp; | |
825 | } | |
826 | ||
827 | /** | |
828 | * ab8500_btemp_get_batctrl_temp() - get the temperature | |
829 | * @btemp: pointer to the btemp structure | |
830 | * | |
831 | * Returns the batctrl temperature in millidegrees | |
832 | */ | |
833 | int ab8500_btemp_get_batctrl_temp(struct ab8500_btemp *btemp) | |
834 | { | |
835 | return btemp->bat_temp * 1000; | |
836 | } | |
837 | ||
838 | /** | |
839 | * ab8500_btemp_get_property() - get the btemp properties | |
840 | * @psy: pointer to the power_supply structure | |
841 | * @psp: pointer to the power_supply_property structure | |
842 | * @val: pointer to the power_supply_propval union | |
843 | * | |
844 | * This function gets called when an application tries to get the btemp | |
845 | * properties by reading the sysfs files. | |
846 | * online: presence of the battery | |
847 | * present: presence of the battery | |
848 | * technology: battery technology | |
849 | * temp: battery temperature | |
850 | * Returns error code in case of failure else 0(on success) | |
851 | */ | |
852 | static int ab8500_btemp_get_property(struct power_supply *psy, | |
853 | enum power_supply_property psp, | |
854 | union power_supply_propval *val) | |
855 | { | |
856 | struct ab8500_btemp *di; | |
857 | ||
858 | di = to_ab8500_btemp_device_info(psy); | |
859 | ||
860 | switch (psp) { | |
861 | case POWER_SUPPLY_PROP_PRESENT: | |
862 | case POWER_SUPPLY_PROP_ONLINE: | |
863 | if (di->events.batt_rem) | |
864 | val->intval = 0; | |
865 | else | |
866 | val->intval = 1; | |
867 | break; | |
868 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
b0284de0 | 869 | val->intval = di->bm->bat_type[di->bm->batt_id].name; |
1f855824 AM |
870 | break; |
871 | case POWER_SUPPLY_PROP_TEMP: | |
872 | val->intval = ab8500_btemp_get_temp(di); | |
873 | break; | |
874 | default: | |
875 | return -EINVAL; | |
876 | } | |
877 | return 0; | |
878 | } | |
879 | ||
880 | static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) | |
881 | { | |
882 | struct power_supply *psy; | |
883 | struct power_supply *ext; | |
884 | struct ab8500_btemp *di; | |
885 | union power_supply_propval ret; | |
886 | int i, j; | |
887 | bool psy_found = false; | |
888 | ||
889 | psy = (struct power_supply *)data; | |
890 | ext = dev_get_drvdata(dev); | |
891 | di = to_ab8500_btemp_device_info(psy); | |
892 | ||
893 | /* | |
894 | * For all psy where the name of your driver | |
895 | * appears in any supplied_to | |
896 | */ | |
897 | for (i = 0; i < ext->num_supplicants; i++) { | |
898 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
899 | psy_found = true; | |
900 | } | |
901 | ||
902 | if (!psy_found) | |
903 | return 0; | |
904 | ||
905 | /* Go through all properties for the psy */ | |
906 | for (j = 0; j < ext->num_properties; j++) { | |
907 | enum power_supply_property prop; | |
908 | prop = ext->properties[j]; | |
909 | ||
910 | if (ext->get_property(ext, prop, &ret)) | |
911 | continue; | |
912 | ||
913 | switch (prop) { | |
914 | case POWER_SUPPLY_PROP_PRESENT: | |
915 | switch (ext->type) { | |
916 | case POWER_SUPPLY_TYPE_MAINS: | |
917 | /* AC disconnected */ | |
918 | if (!ret.intval && di->events.ac_conn) { | |
919 | di->events.ac_conn = false; | |
920 | } | |
921 | /* AC connected */ | |
922 | else if (ret.intval && !di->events.ac_conn) { | |
923 | di->events.ac_conn = true; | |
924 | if (!di->events.usb_conn) | |
925 | ab8500_btemp_periodic(di, true); | |
926 | } | |
927 | break; | |
928 | case POWER_SUPPLY_TYPE_USB: | |
929 | /* USB disconnected */ | |
930 | if (!ret.intval && di->events.usb_conn) { | |
931 | di->events.usb_conn = false; | |
932 | } | |
933 | /* USB connected */ | |
934 | else if (ret.intval && !di->events.usb_conn) { | |
935 | di->events.usb_conn = true; | |
936 | if (!di->events.ac_conn) | |
937 | ab8500_btemp_periodic(di, true); | |
938 | } | |
939 | break; | |
940 | default: | |
941 | break; | |
942 | } | |
943 | break; | |
944 | default: | |
945 | break; | |
946 | } | |
947 | } | |
948 | return 0; | |
949 | } | |
950 | ||
951 | /** | |
952 | * ab8500_btemp_external_power_changed() - callback for power supply changes | |
953 | * @psy: pointer to the structure power_supply | |
954 | * | |
955 | * This function is pointing to the function pointer external_power_changed | |
956 | * of the structure power_supply. | |
957 | * This function gets executed when there is a change in the external power | |
958 | * supply to the btemp. | |
959 | */ | |
960 | static void ab8500_btemp_external_power_changed(struct power_supply *psy) | |
961 | { | |
962 | struct ab8500_btemp *di = to_ab8500_btemp_device_info(psy); | |
963 | ||
964 | class_for_each_device(power_supply_class, NULL, | |
965 | &di->btemp_psy, ab8500_btemp_get_ext_psy_data); | |
966 | } | |
967 | ||
968 | /* ab8500 btemp driver interrupts and their respective isr */ | |
969 | static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { | |
970 | {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, | |
971 | {"BTEMP_LOW", ab8500_btemp_templow_handler}, | |
972 | {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, | |
973 | {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, | |
974 | {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, | |
975 | }; | |
976 | ||
977 | #if defined(CONFIG_PM) | |
978 | static int ab8500_btemp_resume(struct platform_device *pdev) | |
979 | { | |
980 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
981 | ||
982 | ab8500_btemp_periodic(di, true); | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
987 | static int ab8500_btemp_suspend(struct platform_device *pdev, | |
988 | pm_message_t state) | |
989 | { | |
990 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
991 | ||
992 | ab8500_btemp_periodic(di, false); | |
993 | ||
994 | return 0; | |
995 | } | |
996 | #else | |
997 | #define ab8500_btemp_suspend NULL | |
998 | #define ab8500_btemp_resume NULL | |
999 | #endif | |
1000 | ||
415ec69f | 1001 | static int ab8500_btemp_remove(struct platform_device *pdev) |
1f855824 AM |
1002 | { |
1003 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1004 | int i, irq; | |
1005 | ||
1006 | /* Disable interrupts */ | |
1007 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
1008 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1009 | free_irq(irq, di); | |
1010 | } | |
1011 | ||
1012 | /* Delete the work queue */ | |
1013 | destroy_workqueue(di->btemp_wq); | |
1014 | ||
1015 | flush_scheduled_work(); | |
1016 | power_supply_unregister(&di->btemp_psy); | |
1017 | platform_set_drvdata(pdev, NULL); | |
1f855824 AM |
1018 | |
1019 | return 0; | |
1020 | } | |
1021 | ||
bd9e8ab2 R |
1022 | static char *supply_interface[] = { |
1023 | "ab8500_chargalg", | |
1024 | "ab8500_fg", | |
1025 | }; | |
1026 | ||
c8afa640 | 1027 | static int ab8500_btemp_probe(struct platform_device *pdev) |
1f855824 | 1028 | { |
bd9e8ab2 | 1029 | struct device_node *np = pdev->dev.of_node; |
95820245 | 1030 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
e0f1abeb | 1031 | struct ab8500_btemp *di; |
1f855824 AM |
1032 | int irq, i, ret = 0; |
1033 | u8 val; | |
2aac3de1 | 1034 | |
bd9e8ab2 R |
1035 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
1036 | if (!di) { | |
1037 | dev_err(&pdev->dev, "%s no mem for ab8500_btemp\n", __func__); | |
1f855824 | 1038 | return -ENOMEM; |
bd9e8ab2 | 1039 | } |
95820245 LJ |
1040 | |
1041 | if (!plat) { | |
1042 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
1043 | return -EINVAL; | |
1044 | } | |
1045 | di->bm = plat; | |
1046 | ||
1047 | if (np) { | |
1048 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
1049 | if (ret) { | |
1050 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
1051 | return ret; | |
bd9e8ab2 | 1052 | } |
bd9e8ab2 | 1053 | } |
1f855824 AM |
1054 | |
1055 | /* get parent data */ | |
1056 | di->dev = &pdev->dev; | |
1057 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
1058 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
1059 | ||
f6271b4f JA |
1060 | di->initialized = false; |
1061 | ||
1f855824 AM |
1062 | /* BTEMP supply */ |
1063 | di->btemp_psy.name = "ab8500_btemp"; | |
1064 | di->btemp_psy.type = POWER_SUPPLY_TYPE_BATTERY; | |
1065 | di->btemp_psy.properties = ab8500_btemp_props; | |
1066 | di->btemp_psy.num_properties = ARRAY_SIZE(ab8500_btemp_props); | |
1067 | di->btemp_psy.get_property = ab8500_btemp_get_property; | |
bd9e8ab2 R |
1068 | di->btemp_psy.supplied_to = supply_interface; |
1069 | di->btemp_psy.num_supplicants = ARRAY_SIZE(supply_interface); | |
1f855824 AM |
1070 | di->btemp_psy.external_power_changed = |
1071 | ab8500_btemp_external_power_changed; | |
1072 | ||
1073 | ||
1074 | /* Create a work queue for the btemp */ | |
1075 | di->btemp_wq = | |
1076 | create_singlethread_workqueue("ab8500_btemp_wq"); | |
1077 | if (di->btemp_wq == NULL) { | |
1078 | dev_err(di->dev, "failed to create work queue\n"); | |
bd9e8ab2 | 1079 | return -ENOMEM; |
1f855824 AM |
1080 | } |
1081 | ||
1082 | /* Init work for measuring temperature periodically */ | |
203b42f7 | 1083 | INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, |
1f855824 AM |
1084 | ab8500_btemp_periodic_work); |
1085 | ||
1f855824 | 1086 | /* Set BTEMP thermal limits. Low and Med are fixed */ |
0cdaf9a9 HB |
1087 | di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; |
1088 | di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; | |
1f855824 AM |
1089 | |
1090 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1091 | AB8500_BTEMP_HIGH_TH, &val); | |
1092 | if (ret < 0) { | |
1093 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1094 | goto free_btemp_wq; | |
1095 | } | |
1096 | switch (val) { | |
1097 | case BTEMP_HIGH_TH_57_0: | |
1098 | case BTEMP_HIGH_TH_57_1: | |
1099 | di->btemp_ranges.btemp_high_limit = | |
1100 | BTEMP_THERMAL_HIGH_LIMIT_57; | |
1101 | break; | |
1102 | case BTEMP_HIGH_TH_52: | |
1103 | di->btemp_ranges.btemp_high_limit = | |
1104 | BTEMP_THERMAL_HIGH_LIMIT_52; | |
1105 | break; | |
1106 | case BTEMP_HIGH_TH_62: | |
1107 | di->btemp_ranges.btemp_high_limit = | |
1108 | BTEMP_THERMAL_HIGH_LIMIT_62; | |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | /* Register BTEMP power supply class */ | |
1113 | ret = power_supply_register(di->dev, &di->btemp_psy); | |
1114 | if (ret) { | |
1115 | dev_err(di->dev, "failed to register BTEMP psy\n"); | |
1116 | goto free_btemp_wq; | |
1117 | } | |
1118 | ||
1119 | /* Register interrupts */ | |
1120 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
1121 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1122 | ret = request_threaded_irq(irq, NULL, ab8500_btemp_irq[i].isr, | |
1123 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
1124 | ab8500_btemp_irq[i].name, di); | |
1125 | ||
1126 | if (ret) { | |
1127 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
1128 | , ab8500_btemp_irq[i].name, irq, ret); | |
1129 | goto free_irq; | |
1130 | } | |
1131 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
1132 | ab8500_btemp_irq[i].name, irq, ret); | |
1133 | } | |
1134 | ||
1135 | platform_set_drvdata(pdev, di); | |
1136 | ||
1137 | /* Kick off periodic temperature measurements */ | |
1138 | ab8500_btemp_periodic(di, true); | |
1139 | list_add_tail(&di->node, &ab8500_btemp_list); | |
1140 | ||
1141 | return ret; | |
1142 | ||
1143 | free_irq: | |
1144 | power_supply_unregister(&di->btemp_psy); | |
1145 | ||
1146 | /* We also have to free all successfully registered irqs */ | |
1147 | for (i = i - 1; i >= 0; i--) { | |
1148 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1149 | free_irq(irq, di); | |
1150 | } | |
1151 | free_btemp_wq: | |
1152 | destroy_workqueue(di->btemp_wq); | |
1f855824 AM |
1153 | return ret; |
1154 | } | |
1155 | ||
bd9e8ab2 R |
1156 | static const struct of_device_id ab8500_btemp_match[] = { |
1157 | { .compatible = "stericsson,ab8500-btemp", }, | |
1158 | { }, | |
1159 | }; | |
1160 | ||
1f855824 AM |
1161 | static struct platform_driver ab8500_btemp_driver = { |
1162 | .probe = ab8500_btemp_probe, | |
28ea73f4 | 1163 | .remove = ab8500_btemp_remove, |
1f855824 AM |
1164 | .suspend = ab8500_btemp_suspend, |
1165 | .resume = ab8500_btemp_resume, | |
1166 | .driver = { | |
1167 | .name = "ab8500-btemp", | |
1168 | .owner = THIS_MODULE, | |
bd9e8ab2 | 1169 | .of_match_table = ab8500_btemp_match, |
1f855824 AM |
1170 | }, |
1171 | }; | |
1172 | ||
1173 | static int __init ab8500_btemp_init(void) | |
1174 | { | |
1175 | return platform_driver_register(&ab8500_btemp_driver); | |
1176 | } | |
1177 | ||
1178 | static void __exit ab8500_btemp_exit(void) | |
1179 | { | |
1180 | platform_driver_unregister(&ab8500_btemp_driver); | |
1181 | } | |
1182 | ||
eeb0751c | 1183 | device_initcall(ab8500_btemp_init); |
1f855824 AM |
1184 | module_exit(ab8500_btemp_exit); |
1185 | ||
1186 | MODULE_LICENSE("GPL v2"); | |
1187 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
1188 | MODULE_ALIAS("platform:ab8500-btemp"); | |
1189 | MODULE_DESCRIPTION("AB8500 battery temperature driver"); |