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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 | ||
861a30da LJ |
45 | #define BTEMP_BATCTRL_CURR_SRC_60UA 60 |
46 | #define BTEMP_BATCTRL_CURR_SRC_120UA 120 | |
47 | ||
1f855824 AM |
48 | #define to_ab8500_btemp_device_info(x) container_of((x), \ |
49 | struct ab8500_btemp, btemp_psy); | |
50 | ||
51 | /** | |
52 | * struct ab8500_btemp_interrupts - ab8500 interrupts | |
53 | * @name: name of the interrupt | |
54 | * @isr function pointer to the isr | |
55 | */ | |
56 | struct ab8500_btemp_interrupts { | |
57 | char *name; | |
58 | irqreturn_t (*isr)(int irq, void *data); | |
59 | }; | |
60 | ||
61 | struct ab8500_btemp_events { | |
62 | bool batt_rem; | |
63 | bool btemp_high; | |
64 | bool btemp_medhigh; | |
65 | bool btemp_lowmed; | |
66 | bool btemp_low; | |
67 | bool ac_conn; | |
68 | bool usb_conn; | |
69 | }; | |
70 | ||
71 | struct ab8500_btemp_ranges { | |
72 | int btemp_high_limit; | |
73 | int btemp_med_limit; | |
74 | int btemp_low_limit; | |
75 | }; | |
76 | ||
77 | /** | |
78 | * struct ab8500_btemp - ab8500 BTEMP device information | |
79 | * @dev: Pointer to the structure device | |
80 | * @node: List of AB8500 BTEMPs, hence prepared for reentrance | |
81 | * @curr_source: What current source we use, in uA | |
908fe8d6 HB |
82 | * @bat_temp: Dispatched battery temperature in degree Celcius |
83 | * @prev_bat_temp Last measured battery temperature in degree Celcius | |
1f855824 AM |
84 | * @parent: Pointer to the struct ab8500 |
85 | * @gpadc: Pointer to the struct gpadc | |
86 | * @fg: Pointer to the struct fg | |
b0284de0 | 87 | * @bm: Platform specific battery management information |
1f855824 AM |
88 | * @btemp_psy: Structure for BTEMP specific battery properties |
89 | * @events: Structure for information about events triggered | |
90 | * @btemp_ranges: Battery temperature range structure | |
91 | * @btemp_wq: Work queue for measuring the temperature periodically | |
92 | * @btemp_periodic_work: Work for measuring the temperature periodically | |
f6271b4f | 93 | * @initialized: True if battery id read. |
1f855824 AM |
94 | */ |
95 | struct ab8500_btemp { | |
96 | struct device *dev; | |
97 | struct list_head node; | |
98 | int curr_source; | |
99 | int bat_temp; | |
100 | int prev_bat_temp; | |
101 | struct ab8500 *parent; | |
102 | struct ab8500_gpadc *gpadc; | |
103 | struct ab8500_fg *fg; | |
b0284de0 | 104 | struct abx500_bm_data *bm; |
1f855824 AM |
105 | struct power_supply btemp_psy; |
106 | struct ab8500_btemp_events events; | |
107 | struct ab8500_btemp_ranges btemp_ranges; | |
108 | struct workqueue_struct *btemp_wq; | |
109 | struct delayed_work btemp_periodic_work; | |
f6271b4f | 110 | bool initialized; |
1f855824 AM |
111 | }; |
112 | ||
113 | /* BTEMP power supply properties */ | |
114 | static enum power_supply_property ab8500_btemp_props[] = { | |
115 | POWER_SUPPLY_PROP_PRESENT, | |
116 | POWER_SUPPLY_PROP_ONLINE, | |
117 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
118 | POWER_SUPPLY_PROP_TEMP, | |
119 | }; | |
120 | ||
121 | static LIST_HEAD(ab8500_btemp_list); | |
122 | ||
123 | /** | |
124 | * ab8500_btemp_get() - returns a reference to the primary AB8500 BTEMP | |
125 | * (i.e. the first BTEMP in the instance list) | |
126 | */ | |
127 | struct ab8500_btemp *ab8500_btemp_get(void) | |
128 | { | |
129 | struct ab8500_btemp *btemp; | |
130 | btemp = list_first_entry(&ab8500_btemp_list, struct ab8500_btemp, node); | |
131 | ||
132 | return btemp; | |
133 | } | |
134 | ||
135 | /** | |
136 | * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance | |
137 | * @di: pointer to the ab8500_btemp structure | |
138 | * @v_batctrl: measured batctrl voltage | |
139 | * @inst_curr: measured instant current | |
140 | * | |
141 | * This function returns the battery resistance that is | |
142 | * derived from the BATCTRL voltage. | |
143 | * Returns value in Ohms. | |
144 | */ | |
145 | static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, | |
146 | int v_batctrl, int inst_curr) | |
147 | { | |
148 | int rbs; | |
149 | ||
150 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
151 | /* | |
152 | * For ABB cut1.0 and 1.1 BAT_CTRL is internally | |
153 | * connected to 1.8V through a 450k resistor | |
154 | */ | |
155 | return (450000 * (v_batctrl)) / (1800 - v_batctrl); | |
156 | } | |
157 | ||
b0284de0 | 158 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL) { |
1f855824 AM |
159 | /* |
160 | * If the battery has internal NTC, we use the current | |
161 | * source to calculate the resistance, 7uA or 20uA | |
162 | */ | |
163 | rbs = (v_batctrl * 1000 | |
b0284de0 | 164 | - di->bm->gnd_lift_resistance * inst_curr) |
1f855824 AM |
165 | / di->curr_source; |
166 | } else { | |
167 | /* | |
168 | * BAT_CTRL is internally | |
169 | * connected to 1.8V through a 80k resistor | |
170 | */ | |
171 | rbs = (80000 * (v_batctrl)) / (1800 - v_batctrl); | |
172 | } | |
173 | ||
174 | return rbs; | |
175 | } | |
176 | ||
177 | /** | |
178 | * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage | |
179 | * @di: pointer to the ab8500_btemp structure | |
180 | * | |
181 | * This function returns the voltage on BATCTRL. Returns value in mV. | |
182 | */ | |
183 | static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) | |
184 | { | |
185 | int vbtemp; | |
186 | static int prev; | |
187 | ||
188 | vbtemp = ab8500_gpadc_convert(di->gpadc, BAT_CTRL); | |
189 | if (vbtemp < 0) { | |
190 | dev_err(di->dev, | |
191 | "%s gpadc conversion failed, using previous value", | |
192 | __func__); | |
193 | return prev; | |
194 | } | |
195 | prev = vbtemp; | |
196 | return vbtemp; | |
197 | } | |
198 | ||
199 | /** | |
200 | * ab8500_btemp_curr_source_enable() - enable/disable batctrl current source | |
201 | * @di: pointer to the ab8500_btemp structure | |
202 | * @enable: enable or disable the current source | |
203 | * | |
204 | * Enable or disable the current sources for the BatCtrl AD channel | |
205 | */ | |
206 | static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di, | |
207 | bool enable) | |
208 | { | |
209 | int curr; | |
210 | int ret = 0; | |
211 | ||
212 | /* | |
213 | * BATCTRL current sources are included on AB8500 cut2.0 | |
214 | * and future versions | |
215 | */ | |
216 | if (is_ab8500_1p1_or_earlier(di->parent)) | |
217 | return 0; | |
218 | ||
219 | /* Only do this for batteries with internal NTC */ | |
b0284de0 | 220 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && enable) { |
e6aac611 | 221 | |
861a30da LJ |
222 | if (is_ab8540(di->parent)) { |
223 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_60UA) | |
224 | curr = BAT_CTRL_60U_ENA; | |
225 | else | |
226 | curr = BAT_CTRL_120U_ENA; | |
227 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
e6aac611 MJ |
228 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_16UA) |
229 | curr = BAT_CTRL_16U_ENA; | |
230 | else | |
231 | curr = BAT_CTRL_18U_ENA; | |
232 | } else { | |
233 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_7UA) | |
234 | curr = BAT_CTRL_7U_ENA; | |
235 | else | |
236 | curr = BAT_CTRL_20U_ENA; | |
237 | } | |
1f855824 AM |
238 | |
239 | dev_dbg(di->dev, "Set BATCTRL %duA\n", di->curr_source); | |
240 | ||
241 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
242 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
243 | FORCE_BAT_CTRL_CMP_HIGH, FORCE_BAT_CTRL_CMP_HIGH); | |
244 | if (ret) { | |
245 | dev_err(di->dev, "%s failed setting cmp_force\n", | |
246 | __func__); | |
247 | return ret; | |
248 | } | |
249 | ||
250 | /* | |
251 | * We have to wait one 32kHz cycle before enabling | |
252 | * the current source, since ForceBatCtrlCmpHigh needs | |
253 | * to be written in a separate cycle | |
254 | */ | |
255 | udelay(32); | |
256 | ||
257 | ret = abx500_set_register_interruptible(di->dev, | |
258 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
259 | FORCE_BAT_CTRL_CMP_HIGH | curr); | |
260 | if (ret) { | |
261 | dev_err(di->dev, "%s failed enabling current source\n", | |
262 | __func__); | |
263 | goto disable_curr_source; | |
264 | } | |
b0284de0 | 265 | } else if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && !enable) { |
1f855824 AM |
266 | dev_dbg(di->dev, "Disable BATCTRL curr source\n"); |
267 | ||
861a30da LJ |
268 | if (is_ab8540(di->parent)) { |
269 | /* Write 0 to the curr bits */ | |
270 | ret = abx500_mask_and_set_register_interruptible( | |
271 | di->dev, | |
272 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
273 | BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA, | |
274 | ~(BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA)); | |
275 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
e6aac611 MJ |
276 | /* Write 0 to the curr bits */ |
277 | ret = abx500_mask_and_set_register_interruptible( | |
278 | di->dev, | |
279 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
280 | BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA, | |
281 | ~(BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA)); | |
282 | } else { | |
283 | /* Write 0 to the curr bits */ | |
284 | ret = abx500_mask_and_set_register_interruptible( | |
285 | di->dev, | |
286 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
287 | BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, | |
288 | ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); | |
289 | } | |
290 | ||
1f855824 AM |
291 | if (ret) { |
292 | dev_err(di->dev, "%s failed disabling current source\n", | |
293 | __func__); | |
294 | goto disable_curr_source; | |
295 | } | |
296 | ||
297 | /* Enable Pull-Up and comparator */ | |
298 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
299 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
300 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, | |
301 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); | |
302 | if (ret) { | |
303 | dev_err(di->dev, "%s failed enabling PU and comp\n", | |
304 | __func__); | |
305 | goto enable_pu_comp; | |
306 | } | |
307 | ||
308 | /* | |
309 | * We have to wait one 32kHz cycle before disabling | |
310 | * ForceBatCtrlCmpHigh since this needs to be written | |
311 | * in a separate cycle | |
312 | */ | |
313 | udelay(32); | |
314 | ||
315 | /* Disable 'force comparator' */ | |
316 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
317 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
318 | FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); | |
319 | if (ret) { | |
320 | dev_err(di->dev, "%s failed disabling force comp\n", | |
321 | __func__); | |
322 | goto disable_force_comp; | |
323 | } | |
324 | } | |
325 | return ret; | |
326 | ||
327 | /* | |
328 | * We have to try unsetting FORCE_BAT_CTRL_CMP_HIGH one more time | |
329 | * if we got an error above | |
330 | */ | |
331 | disable_curr_source: | |
861a30da LJ |
332 | if (is_ab8540(di->parent)) { |
333 | /* Write 0 to the curr bits */ | |
334 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
335 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
336 | BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA, | |
337 | ~(BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA)); | |
338 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
e6aac611 MJ |
339 | /* Write 0 to the curr bits */ |
340 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
341 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
342 | BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA, | |
343 | ~(BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA)); | |
344 | } else { | |
345 | /* Write 0 to the curr bits */ | |
346 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1f855824 AM |
347 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, |
348 | BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, | |
349 | ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); | |
e6aac611 MJ |
350 | } |
351 | ||
1f855824 AM |
352 | if (ret) { |
353 | dev_err(di->dev, "%s failed disabling current source\n", | |
354 | __func__); | |
355 | return ret; | |
356 | } | |
357 | enable_pu_comp: | |
358 | /* Enable Pull-Up and comparator */ | |
359 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
360 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
361 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, | |
362 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); | |
363 | if (ret) { | |
364 | dev_err(di->dev, "%s failed enabling PU and comp\n", | |
365 | __func__); | |
366 | return ret; | |
367 | } | |
368 | ||
369 | disable_force_comp: | |
370 | /* | |
371 | * We have to wait one 32kHz cycle before disabling | |
372 | * ForceBatCtrlCmpHigh since this needs to be written | |
373 | * in a separate cycle | |
374 | */ | |
375 | udelay(32); | |
376 | ||
377 | /* Disable 'force comparator' */ | |
378 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
379 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
380 | FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); | |
381 | if (ret) { | |
382 | dev_err(di->dev, "%s failed disabling force comp\n", | |
383 | __func__); | |
384 | return ret; | |
385 | } | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
390 | /** | |
391 | * ab8500_btemp_get_batctrl_res() - get battery resistance | |
392 | * @di: pointer to the ab8500_btemp structure | |
393 | * | |
394 | * This function returns the battery pack identification resistance. | |
395 | * Returns value in Ohms. | |
396 | */ | |
397 | static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) | |
398 | { | |
399 | int ret; | |
400 | int batctrl = 0; | |
401 | int res; | |
402 | int inst_curr; | |
403 | int i; | |
404 | ||
405 | /* | |
406 | * BATCTRL current sources are included on AB8500 cut2.0 | |
407 | * and future versions | |
408 | */ | |
409 | ret = ab8500_btemp_curr_source_enable(di, true); | |
410 | if (ret) { | |
411 | dev_err(di->dev, "%s curr source enabled failed\n", __func__); | |
412 | return ret; | |
413 | } | |
414 | ||
415 | if (!di->fg) | |
416 | di->fg = ab8500_fg_get(); | |
417 | if (!di->fg) { | |
418 | dev_err(di->dev, "No fg found\n"); | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | ret = ab8500_fg_inst_curr_start(di->fg); | |
423 | ||
424 | if (ret) { | |
425 | dev_err(di->dev, "Failed to start current measurement\n"); | |
426 | return ret; | |
427 | } | |
428 | ||
3988a4df JB |
429 | do { |
430 | msleep(20); | |
431 | } while (!ab8500_fg_inst_curr_started(di->fg)); | |
432 | ||
1f855824 AM |
433 | i = 0; |
434 | ||
435 | do { | |
436 | batctrl += ab8500_btemp_read_batctrl_voltage(di); | |
437 | i++; | |
438 | msleep(20); | |
439 | } while (!ab8500_fg_inst_curr_done(di->fg)); | |
440 | batctrl /= i; | |
441 | ||
442 | ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); | |
443 | if (ret) { | |
444 | dev_err(di->dev, "Failed to finalize current measurement\n"); | |
445 | return ret; | |
446 | } | |
447 | ||
448 | res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); | |
449 | ||
450 | ret = ab8500_btemp_curr_source_enable(di, false); | |
451 | if (ret) { | |
452 | dev_err(di->dev, "%s curr source disable failed\n", __func__); | |
453 | return ret; | |
454 | } | |
455 | ||
456 | dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", | |
457 | __func__, batctrl, res, inst_curr, i); | |
458 | ||
459 | return res; | |
460 | } | |
461 | ||
462 | /** | |
463 | * ab8500_btemp_res_to_temp() - resistance to temperature | |
464 | * @di: pointer to the ab8500_btemp structure | |
465 | * @tbl: pointer to the resiatance to temperature table | |
466 | * @tbl_size: size of the resistance to temperature table | |
467 | * @res: resistance to calculate the temperature from | |
468 | * | |
469 | * This function returns the battery temperature in degrees Celcius | |
470 | * based on the NTC resistance. | |
471 | */ | |
472 | static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di, | |
473 | const struct abx500_res_to_temp *tbl, int tbl_size, int res) | |
474 | { | |
475 | int i, temp; | |
476 | /* | |
477 | * Calculate the formula for the straight line | |
478 | * Simple interpolation if we are within | |
479 | * the resistance table limits, extrapolate | |
480 | * if resistance is outside the limits. | |
481 | */ | |
482 | if (res > tbl[0].resist) | |
483 | i = 0; | |
484 | else if (res <= tbl[tbl_size - 1].resist) | |
485 | i = tbl_size - 2; | |
486 | else { | |
487 | i = 0; | |
488 | while (!(res <= tbl[i].resist && | |
489 | res > tbl[i + 1].resist)) | |
490 | i++; | |
491 | } | |
492 | ||
493 | temp = tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) * | |
494 | (res - tbl[i].resist)) / (tbl[i + 1].resist - tbl[i].resist); | |
495 | return temp; | |
496 | } | |
497 | ||
498 | /** | |
499 | * ab8500_btemp_measure_temp() - measure battery temperature | |
500 | * @di: pointer to the ab8500_btemp structure | |
501 | * | |
502 | * Returns battery temperature (on success) else the previous temperature | |
503 | */ | |
504 | static int ab8500_btemp_measure_temp(struct ab8500_btemp *di) | |
505 | { | |
506 | int temp; | |
507 | static int prev; | |
508 | int rbat, rntc, vntc; | |
509 | u8 id; | |
510 | ||
b0284de0 | 511 | id = di->bm->batt_id; |
1f855824 | 512 | |
b0284de0 | 513 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && |
1f855824 AM |
514 | id != BATTERY_UNKNOWN) { |
515 | ||
516 | rbat = ab8500_btemp_get_batctrl_res(di); | |
517 | if (rbat < 0) { | |
518 | dev_err(di->dev, "%s get batctrl res failed\n", | |
519 | __func__); | |
520 | /* | |
521 | * Return out-of-range temperature so that | |
522 | * charging is stopped | |
523 | */ | |
524 | return BTEMP_THERMAL_LOW_LIMIT; | |
525 | } | |
526 | ||
527 | temp = ab8500_btemp_res_to_temp(di, | |
b0284de0 LJ |
528 | di->bm->bat_type[id].r_to_t_tbl, |
529 | di->bm->bat_type[id].n_temp_tbl_elements, rbat); | |
1f855824 AM |
530 | } else { |
531 | vntc = ab8500_gpadc_convert(di->gpadc, BTEMP_BALL); | |
532 | if (vntc < 0) { | |
533 | dev_err(di->dev, | |
534 | "%s gpadc conversion failed," | |
535 | " using previous value\n", __func__); | |
536 | return prev; | |
537 | } | |
538 | /* | |
539 | * The PCB NTC is sourced from VTVOUT via a 230kOhm | |
540 | * resistor. | |
541 | */ | |
542 | rntc = 230000 * vntc / (VTVOUT_V - vntc); | |
543 | ||
544 | temp = ab8500_btemp_res_to_temp(di, | |
b0284de0 LJ |
545 | di->bm->bat_type[id].r_to_t_tbl, |
546 | di->bm->bat_type[id].n_temp_tbl_elements, rntc); | |
1f855824 AM |
547 | prev = temp; |
548 | } | |
549 | dev_dbg(di->dev, "Battery temperature is %d\n", temp); | |
550 | return temp; | |
551 | } | |
552 | ||
553 | /** | |
554 | * ab8500_btemp_id() - Identify the connected battery | |
555 | * @di: pointer to the ab8500_btemp structure | |
556 | * | |
557 | * This function will try to identify the battery by reading the ID | |
558 | * resistor. Some brands use a combined ID resistor with a NTC resistor to | |
559 | * both be able to identify and to read the temperature of it. | |
560 | */ | |
561 | static int ab8500_btemp_id(struct ab8500_btemp *di) | |
562 | { | |
563 | int res; | |
564 | u8 i; | |
861a30da LJ |
565 | if (is_ab8540(di->parent)) |
566 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_60UA; | |
567 | else if (is_ab9540(di->parent) || is_ab8505(di->parent)) | |
e6aac611 MJ |
568 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA; |
569 | else | |
570 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; | |
1f855824 | 571 | |
b0284de0 | 572 | di->bm->batt_id = BATTERY_UNKNOWN; |
1f855824 AM |
573 | |
574 | res = ab8500_btemp_get_batctrl_res(di); | |
575 | if (res < 0) { | |
576 | dev_err(di->dev, "%s get batctrl res failed\n", __func__); | |
577 | return -ENXIO; | |
578 | } | |
579 | ||
580 | /* BATTERY_UNKNOWN is defined on position 0, skip it! */ | |
b0284de0 LJ |
581 | for (i = BATTERY_UNKNOWN + 1; i < di->bm->n_btypes; i++) { |
582 | if ((res <= di->bm->bat_type[i].resis_high) && | |
583 | (res >= di->bm->bat_type[i].resis_low)) { | |
1f855824 AM |
584 | dev_dbg(di->dev, "Battery detected on %s" |
585 | " low %d < res %d < high: %d" | |
586 | " index: %d\n", | |
b0284de0 | 587 | di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL ? |
1f855824 | 588 | "BATCTRL" : "BATTEMP", |
b0284de0 LJ |
589 | di->bm->bat_type[i].resis_low, res, |
590 | di->bm->bat_type[i].resis_high, i); | |
1f855824 | 591 | |
b0284de0 | 592 | di->bm->batt_id = i; |
1f855824 AM |
593 | break; |
594 | } | |
595 | } | |
596 | ||
b0284de0 | 597 | if (di->bm->batt_id == BATTERY_UNKNOWN) { |
1f855824 AM |
598 | dev_warn(di->dev, "Battery identified as unknown" |
599 | ", resistance %d Ohm\n", res); | |
600 | return -ENXIO; | |
601 | } | |
602 | ||
603 | /* | |
604 | * We only have to change current source if the | |
605 | * detected type is Type 1, else we use the 7uA source | |
606 | */ | |
b0284de0 | 607 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && |
861a30da LJ |
608 | di->bm->batt_id == 1) { |
609 | if (is_ab8540(di->parent)) { | |
610 | dev_dbg(di->dev, | |
611 | "Set BATCTRL current source to 60uA\n"); | |
612 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_60UA; | |
613 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
614 | dev_dbg(di->dev, | |
615 | "Set BATCTRL current source to 16uA\n"); | |
e6aac611 MJ |
616 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA; |
617 | } else { | |
618 | dev_dbg(di->dev, "Set BATCTRL current source to 20uA\n"); | |
619 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_20UA; | |
620 | } | |
1f855824 AM |
621 | } |
622 | ||
b0284de0 | 623 | return di->bm->batt_id; |
1f855824 AM |
624 | } |
625 | ||
626 | /** | |
627 | * ab8500_btemp_periodic_work() - Measuring the temperature periodically | |
628 | * @work: pointer to the work_struct structure | |
629 | * | |
630 | * Work function for measuring the temperature periodically | |
631 | */ | |
632 | static void ab8500_btemp_periodic_work(struct work_struct *work) | |
633 | { | |
634 | int interval; | |
908fe8d6 | 635 | int bat_temp; |
1f855824 AM |
636 | struct ab8500_btemp *di = container_of(work, |
637 | struct ab8500_btemp, btemp_periodic_work.work); | |
638 | ||
f6271b4f | 639 | if (!di->initialized) { |
f6271b4f JA |
640 | /* Identify the battery */ |
641 | if (ab8500_btemp_id(di) < 0) | |
642 | dev_warn(di->dev, "failed to identify the battery\n"); | |
643 | } | |
644 | ||
908fe8d6 HB |
645 | bat_temp = ab8500_btemp_measure_temp(di); |
646 | /* | |
647 | * Filter battery temperature. | |
648 | * Allow direct updates on temperature only if two samples result in | |
649 | * same temperature. Else only allow 1 degree change from previous | |
650 | * reported value in the direction of the new measurement. | |
651 | */ | |
2c4c40ac RK |
652 | if ((bat_temp == di->prev_bat_temp) || !di->initialized) { |
653 | if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { | |
654 | di->initialized = true; | |
908fe8d6 HB |
655 | di->bat_temp = bat_temp; |
656 | power_supply_changed(&di->btemp_psy); | |
657 | } | |
658 | } else if (bat_temp < di->prev_bat_temp) { | |
659 | di->bat_temp--; | |
660 | power_supply_changed(&di->btemp_psy); | |
661 | } else if (bat_temp > di->prev_bat_temp) { | |
662 | di->bat_temp++; | |
1f855824 AM |
663 | power_supply_changed(&di->btemp_psy); |
664 | } | |
908fe8d6 | 665 | di->prev_bat_temp = bat_temp; |
1f855824 AM |
666 | |
667 | if (di->events.ac_conn || di->events.usb_conn) | |
b0284de0 | 668 | interval = di->bm->temp_interval_chg; |
1f855824 | 669 | else |
b0284de0 | 670 | interval = di->bm->temp_interval_nochg; |
1f855824 AM |
671 | |
672 | /* Schedule a new measurement */ | |
673 | queue_delayed_work(di->btemp_wq, | |
674 | &di->btemp_periodic_work, | |
675 | round_jiffies(interval * HZ)); | |
676 | } | |
677 | ||
678 | /** | |
679 | * ab8500_btemp_batctrlindb_handler() - battery removal detected | |
680 | * @irq: interrupt number | |
681 | * @_di: void pointer that has to address of ab8500_btemp | |
682 | * | |
683 | * Returns IRQ status(IRQ_HANDLED) | |
684 | */ | |
685 | static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) | |
686 | { | |
687 | struct ab8500_btemp *di = _di; | |
688 | dev_err(di->dev, "Battery removal detected!\n"); | |
689 | ||
690 | di->events.batt_rem = true; | |
691 | power_supply_changed(&di->btemp_psy); | |
692 | ||
693 | return IRQ_HANDLED; | |
694 | } | |
695 | ||
696 | /** | |
697 | * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees | |
698 | * @irq: interrupt number | |
699 | * @_di: void pointer that has to address of ab8500_btemp | |
700 | * | |
701 | * Returns IRQ status(IRQ_HANDLED) | |
702 | */ | |
703 | static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) | |
704 | { | |
705 | struct ab8500_btemp *di = _di; | |
706 | ||
d36e3e6d | 707 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 | 708 | dev_dbg(di->dev, "Ignore false btemp low irq" |
d36e3e6d | 709 | " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); |
1f855824 AM |
710 | } else { |
711 | dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); | |
712 | ||
713 | di->events.btemp_low = true; | |
714 | di->events.btemp_high = false; | |
715 | di->events.btemp_medhigh = false; | |
716 | di->events.btemp_lowmed = false; | |
717 | power_supply_changed(&di->btemp_psy); | |
718 | } | |
719 | ||
720 | return IRQ_HANDLED; | |
721 | } | |
722 | ||
723 | /** | |
724 | * ab8500_btemp_temphigh_handler() - battery temp higher than max temp | |
725 | * @irq: interrupt number | |
726 | * @_di: void pointer that has to address of ab8500_btemp | |
727 | * | |
728 | * Returns IRQ status(IRQ_HANDLED) | |
729 | */ | |
730 | static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) | |
731 | { | |
732 | struct ab8500_btemp *di = _di; | |
733 | ||
734 | dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); | |
735 | ||
736 | di->events.btemp_high = true; | |
737 | di->events.btemp_medhigh = false; | |
738 | di->events.btemp_lowmed = false; | |
739 | di->events.btemp_low = false; | |
740 | power_supply_changed(&di->btemp_psy); | |
741 | ||
742 | return IRQ_HANDLED; | |
743 | } | |
744 | ||
745 | /** | |
746 | * ab8500_btemp_lowmed_handler() - battery temp between low and medium | |
747 | * @irq: interrupt number | |
748 | * @_di: void pointer that has to address of ab8500_btemp | |
749 | * | |
750 | * Returns IRQ status(IRQ_HANDLED) | |
751 | */ | |
752 | static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) | |
753 | { | |
754 | struct ab8500_btemp *di = _di; | |
755 | ||
756 | dev_dbg(di->dev, "Battery temperature is between low and medium\n"); | |
757 | ||
758 | di->events.btemp_lowmed = true; | |
759 | di->events.btemp_medhigh = false; | |
760 | di->events.btemp_high = false; | |
761 | di->events.btemp_low = false; | |
762 | power_supply_changed(&di->btemp_psy); | |
763 | ||
764 | return IRQ_HANDLED; | |
765 | } | |
766 | ||
767 | /** | |
768 | * ab8500_btemp_medhigh_handler() - battery temp between medium and high | |
769 | * @irq: interrupt number | |
770 | * @_di: void pointer that has to address of ab8500_btemp | |
771 | * | |
772 | * Returns IRQ status(IRQ_HANDLED) | |
773 | */ | |
774 | static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) | |
775 | { | |
776 | struct ab8500_btemp *di = _di; | |
777 | ||
778 | dev_dbg(di->dev, "Battery temperature is between medium and high\n"); | |
779 | ||
780 | di->events.btemp_medhigh = true; | |
781 | di->events.btemp_lowmed = false; | |
782 | di->events.btemp_high = false; | |
783 | di->events.btemp_low = false; | |
784 | power_supply_changed(&di->btemp_psy); | |
785 | ||
786 | return IRQ_HANDLED; | |
787 | } | |
788 | ||
789 | /** | |
790 | * ab8500_btemp_periodic() - Periodic temperature measurements | |
791 | * @di: pointer to the ab8500_btemp structure | |
792 | * @enable: enable or disable periodic temperature measurements | |
793 | * | |
794 | * Starts of stops periodic temperature measurements. Periodic measurements | |
795 | * should only be done when a charger is connected. | |
796 | */ | |
797 | static void ab8500_btemp_periodic(struct ab8500_btemp *di, | |
798 | bool enable) | |
799 | { | |
800 | dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", | |
801 | enable); | |
802 | /* | |
803 | * Make sure a new measurement is done directly by cancelling | |
804 | * any pending work | |
805 | */ | |
806 | cancel_delayed_work_sync(&di->btemp_periodic_work); | |
807 | ||
808 | if (enable) | |
809 | queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); | |
810 | } | |
811 | ||
812 | /** | |
813 | * ab8500_btemp_get_temp() - get battery temperature | |
814 | * @di: pointer to the ab8500_btemp structure | |
815 | * | |
816 | * Returns battery temperature | |
817 | */ | |
818 | static int ab8500_btemp_get_temp(struct ab8500_btemp *di) | |
819 | { | |
820 | int temp = 0; | |
821 | ||
822 | /* | |
d36e3e6d | 823 | * The BTEMP events are not reliabe on AB8500 cut3.3 |
1f855824 AM |
824 | * and prior versions |
825 | */ | |
d36e3e6d | 826 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 AM |
827 | temp = di->bat_temp * 10; |
828 | } else { | |
829 | if (di->events.btemp_low) { | |
830 | if (temp > di->btemp_ranges.btemp_low_limit) | |
5b41aa9f | 831 | temp = di->btemp_ranges.btemp_low_limit * 10; |
1f855824 AM |
832 | else |
833 | temp = di->bat_temp * 10; | |
834 | } else if (di->events.btemp_high) { | |
835 | if (temp < di->btemp_ranges.btemp_high_limit) | |
5b41aa9f | 836 | temp = di->btemp_ranges.btemp_high_limit * 10; |
1f855824 AM |
837 | else |
838 | temp = di->bat_temp * 10; | |
839 | } else if (di->events.btemp_lowmed) { | |
840 | if (temp > di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 841 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
842 | else |
843 | temp = di->bat_temp * 10; | |
844 | } else if (di->events.btemp_medhigh) { | |
845 | if (temp < di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 846 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
847 | else |
848 | temp = di->bat_temp * 10; | |
849 | } else | |
850 | temp = di->bat_temp * 10; | |
851 | } | |
852 | return temp; | |
853 | } | |
854 | ||
855 | /** | |
856 | * ab8500_btemp_get_batctrl_temp() - get the temperature | |
857 | * @btemp: pointer to the btemp structure | |
858 | * | |
859 | * Returns the batctrl temperature in millidegrees | |
860 | */ | |
861 | int ab8500_btemp_get_batctrl_temp(struct ab8500_btemp *btemp) | |
862 | { | |
863 | return btemp->bat_temp * 1000; | |
864 | } | |
865 | ||
866 | /** | |
867 | * ab8500_btemp_get_property() - get the btemp properties | |
868 | * @psy: pointer to the power_supply structure | |
869 | * @psp: pointer to the power_supply_property structure | |
870 | * @val: pointer to the power_supply_propval union | |
871 | * | |
872 | * This function gets called when an application tries to get the btemp | |
873 | * properties by reading the sysfs files. | |
874 | * online: presence of the battery | |
875 | * present: presence of the battery | |
876 | * technology: battery technology | |
877 | * temp: battery temperature | |
878 | * Returns error code in case of failure else 0(on success) | |
879 | */ | |
880 | static int ab8500_btemp_get_property(struct power_supply *psy, | |
881 | enum power_supply_property psp, | |
882 | union power_supply_propval *val) | |
883 | { | |
884 | struct ab8500_btemp *di; | |
885 | ||
886 | di = to_ab8500_btemp_device_info(psy); | |
887 | ||
888 | switch (psp) { | |
889 | case POWER_SUPPLY_PROP_PRESENT: | |
890 | case POWER_SUPPLY_PROP_ONLINE: | |
891 | if (di->events.batt_rem) | |
892 | val->intval = 0; | |
893 | else | |
894 | val->intval = 1; | |
895 | break; | |
896 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
b0284de0 | 897 | val->intval = di->bm->bat_type[di->bm->batt_id].name; |
1f855824 AM |
898 | break; |
899 | case POWER_SUPPLY_PROP_TEMP: | |
900 | val->intval = ab8500_btemp_get_temp(di); | |
901 | break; | |
902 | default: | |
903 | return -EINVAL; | |
904 | } | |
905 | return 0; | |
906 | } | |
907 | ||
908 | static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) | |
909 | { | |
910 | struct power_supply *psy; | |
911 | struct power_supply *ext; | |
912 | struct ab8500_btemp *di; | |
913 | union power_supply_propval ret; | |
914 | int i, j; | |
915 | bool psy_found = false; | |
916 | ||
917 | psy = (struct power_supply *)data; | |
918 | ext = dev_get_drvdata(dev); | |
919 | di = to_ab8500_btemp_device_info(psy); | |
920 | ||
921 | /* | |
922 | * For all psy where the name of your driver | |
923 | * appears in any supplied_to | |
924 | */ | |
925 | for (i = 0; i < ext->num_supplicants; i++) { | |
926 | if (!strcmp(ext->supplied_to[i], psy->name)) | |
927 | psy_found = true; | |
928 | } | |
929 | ||
930 | if (!psy_found) | |
931 | return 0; | |
932 | ||
933 | /* Go through all properties for the psy */ | |
934 | for (j = 0; j < ext->num_properties; j++) { | |
935 | enum power_supply_property prop; | |
936 | prop = ext->properties[j]; | |
937 | ||
938 | if (ext->get_property(ext, prop, &ret)) | |
939 | continue; | |
940 | ||
941 | switch (prop) { | |
942 | case POWER_SUPPLY_PROP_PRESENT: | |
943 | switch (ext->type) { | |
944 | case POWER_SUPPLY_TYPE_MAINS: | |
945 | /* AC disconnected */ | |
946 | if (!ret.intval && di->events.ac_conn) { | |
947 | di->events.ac_conn = false; | |
948 | } | |
949 | /* AC connected */ | |
950 | else if (ret.intval && !di->events.ac_conn) { | |
951 | di->events.ac_conn = true; | |
952 | if (!di->events.usb_conn) | |
953 | ab8500_btemp_periodic(di, true); | |
954 | } | |
955 | break; | |
956 | case POWER_SUPPLY_TYPE_USB: | |
957 | /* USB disconnected */ | |
958 | if (!ret.intval && di->events.usb_conn) { | |
959 | di->events.usb_conn = false; | |
960 | } | |
961 | /* USB connected */ | |
962 | else if (ret.intval && !di->events.usb_conn) { | |
963 | di->events.usb_conn = true; | |
964 | if (!di->events.ac_conn) | |
965 | ab8500_btemp_periodic(di, true); | |
966 | } | |
967 | break; | |
968 | default: | |
969 | break; | |
970 | } | |
971 | break; | |
972 | default: | |
973 | break; | |
974 | } | |
975 | } | |
976 | return 0; | |
977 | } | |
978 | ||
979 | /** | |
980 | * ab8500_btemp_external_power_changed() - callback for power supply changes | |
981 | * @psy: pointer to the structure power_supply | |
982 | * | |
983 | * This function is pointing to the function pointer external_power_changed | |
984 | * of the structure power_supply. | |
985 | * This function gets executed when there is a change in the external power | |
986 | * supply to the btemp. | |
987 | */ | |
988 | static void ab8500_btemp_external_power_changed(struct power_supply *psy) | |
989 | { | |
990 | struct ab8500_btemp *di = to_ab8500_btemp_device_info(psy); | |
991 | ||
992 | class_for_each_device(power_supply_class, NULL, | |
993 | &di->btemp_psy, ab8500_btemp_get_ext_psy_data); | |
994 | } | |
995 | ||
996 | /* ab8500 btemp driver interrupts and their respective isr */ | |
997 | static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { | |
998 | {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, | |
999 | {"BTEMP_LOW", ab8500_btemp_templow_handler}, | |
1000 | {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, | |
1001 | {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, | |
1002 | {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, | |
1003 | }; | |
1004 | ||
1005 | #if defined(CONFIG_PM) | |
1006 | static int ab8500_btemp_resume(struct platform_device *pdev) | |
1007 | { | |
1008 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1009 | ||
1010 | ab8500_btemp_periodic(di, true); | |
1011 | ||
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | static int ab8500_btemp_suspend(struct platform_device *pdev, | |
1016 | pm_message_t state) | |
1017 | { | |
1018 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1019 | ||
1020 | ab8500_btemp_periodic(di, false); | |
1021 | ||
1022 | return 0; | |
1023 | } | |
1024 | #else | |
1025 | #define ab8500_btemp_suspend NULL | |
1026 | #define ab8500_btemp_resume NULL | |
1027 | #endif | |
1028 | ||
415ec69f | 1029 | static int ab8500_btemp_remove(struct platform_device *pdev) |
1f855824 AM |
1030 | { |
1031 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1032 | int i, irq; | |
1033 | ||
1034 | /* Disable interrupts */ | |
1035 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
1036 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1037 | free_irq(irq, di); | |
1038 | } | |
1039 | ||
1040 | /* Delete the work queue */ | |
1041 | destroy_workqueue(di->btemp_wq); | |
1042 | ||
1043 | flush_scheduled_work(); | |
1044 | power_supply_unregister(&di->btemp_psy); | |
1045 | platform_set_drvdata(pdev, NULL); | |
1f855824 AM |
1046 | |
1047 | return 0; | |
1048 | } | |
1049 | ||
bd9e8ab2 R |
1050 | static char *supply_interface[] = { |
1051 | "ab8500_chargalg", | |
1052 | "ab8500_fg", | |
1053 | }; | |
1054 | ||
c8afa640 | 1055 | static int ab8500_btemp_probe(struct platform_device *pdev) |
1f855824 | 1056 | { |
bd9e8ab2 | 1057 | struct device_node *np = pdev->dev.of_node; |
95820245 | 1058 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
e0f1abeb | 1059 | struct ab8500_btemp *di; |
1f855824 AM |
1060 | int irq, i, ret = 0; |
1061 | u8 val; | |
2aac3de1 | 1062 | |
bd9e8ab2 R |
1063 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
1064 | if (!di) { | |
1065 | dev_err(&pdev->dev, "%s no mem for ab8500_btemp\n", __func__); | |
1f855824 | 1066 | return -ENOMEM; |
bd9e8ab2 | 1067 | } |
95820245 LJ |
1068 | |
1069 | if (!plat) { | |
1070 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
1071 | return -EINVAL; | |
1072 | } | |
1073 | di->bm = plat; | |
1074 | ||
1075 | if (np) { | |
1076 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
1077 | if (ret) { | |
1078 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
1079 | return ret; | |
bd9e8ab2 | 1080 | } |
bd9e8ab2 | 1081 | } |
1f855824 AM |
1082 | |
1083 | /* get parent data */ | |
1084 | di->dev = &pdev->dev; | |
1085 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
1086 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
1087 | ||
f6271b4f JA |
1088 | di->initialized = false; |
1089 | ||
1f855824 AM |
1090 | /* BTEMP supply */ |
1091 | di->btemp_psy.name = "ab8500_btemp"; | |
1092 | di->btemp_psy.type = POWER_SUPPLY_TYPE_BATTERY; | |
1093 | di->btemp_psy.properties = ab8500_btemp_props; | |
1094 | di->btemp_psy.num_properties = ARRAY_SIZE(ab8500_btemp_props); | |
1095 | di->btemp_psy.get_property = ab8500_btemp_get_property; | |
bd9e8ab2 R |
1096 | di->btemp_psy.supplied_to = supply_interface; |
1097 | di->btemp_psy.num_supplicants = ARRAY_SIZE(supply_interface); | |
1f855824 AM |
1098 | di->btemp_psy.external_power_changed = |
1099 | ab8500_btemp_external_power_changed; | |
1100 | ||
1101 | ||
1102 | /* Create a work queue for the btemp */ | |
1103 | di->btemp_wq = | |
1104 | create_singlethread_workqueue("ab8500_btemp_wq"); | |
1105 | if (di->btemp_wq == NULL) { | |
1106 | dev_err(di->dev, "failed to create work queue\n"); | |
bd9e8ab2 | 1107 | return -ENOMEM; |
1f855824 AM |
1108 | } |
1109 | ||
1110 | /* Init work for measuring temperature periodically */ | |
203b42f7 | 1111 | INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, |
1f855824 AM |
1112 | ab8500_btemp_periodic_work); |
1113 | ||
1f855824 | 1114 | /* Set BTEMP thermal limits. Low and Med are fixed */ |
0cdaf9a9 HB |
1115 | di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; |
1116 | di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; | |
1f855824 AM |
1117 | |
1118 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1119 | AB8500_BTEMP_HIGH_TH, &val); | |
1120 | if (ret < 0) { | |
1121 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1122 | goto free_btemp_wq; | |
1123 | } | |
1124 | switch (val) { | |
1125 | case BTEMP_HIGH_TH_57_0: | |
1126 | case BTEMP_HIGH_TH_57_1: | |
1127 | di->btemp_ranges.btemp_high_limit = | |
1128 | BTEMP_THERMAL_HIGH_LIMIT_57; | |
1129 | break; | |
1130 | case BTEMP_HIGH_TH_52: | |
1131 | di->btemp_ranges.btemp_high_limit = | |
1132 | BTEMP_THERMAL_HIGH_LIMIT_52; | |
1133 | break; | |
1134 | case BTEMP_HIGH_TH_62: | |
1135 | di->btemp_ranges.btemp_high_limit = | |
1136 | BTEMP_THERMAL_HIGH_LIMIT_62; | |
1137 | break; | |
1138 | } | |
1139 | ||
1140 | /* Register BTEMP power supply class */ | |
1141 | ret = power_supply_register(di->dev, &di->btemp_psy); | |
1142 | if (ret) { | |
1143 | dev_err(di->dev, "failed to register BTEMP psy\n"); | |
1144 | goto free_btemp_wq; | |
1145 | } | |
1146 | ||
1147 | /* Register interrupts */ | |
1148 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
1149 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1150 | ret = request_threaded_irq(irq, NULL, ab8500_btemp_irq[i].isr, | |
1151 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
1152 | ab8500_btemp_irq[i].name, di); | |
1153 | ||
1154 | if (ret) { | |
1155 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
1156 | , ab8500_btemp_irq[i].name, irq, ret); | |
1157 | goto free_irq; | |
1158 | } | |
1159 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
1160 | ab8500_btemp_irq[i].name, irq, ret); | |
1161 | } | |
1162 | ||
1163 | platform_set_drvdata(pdev, di); | |
1164 | ||
1165 | /* Kick off periodic temperature measurements */ | |
1166 | ab8500_btemp_periodic(di, true); | |
1167 | list_add_tail(&di->node, &ab8500_btemp_list); | |
1168 | ||
1169 | return ret; | |
1170 | ||
1171 | free_irq: | |
1172 | power_supply_unregister(&di->btemp_psy); | |
1173 | ||
1174 | /* We also have to free all successfully registered irqs */ | |
1175 | for (i = i - 1; i >= 0; i--) { | |
1176 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1177 | free_irq(irq, di); | |
1178 | } | |
1179 | free_btemp_wq: | |
1180 | destroy_workqueue(di->btemp_wq); | |
1f855824 AM |
1181 | return ret; |
1182 | } | |
1183 | ||
bd9e8ab2 R |
1184 | static const struct of_device_id ab8500_btemp_match[] = { |
1185 | { .compatible = "stericsson,ab8500-btemp", }, | |
1186 | { }, | |
1187 | }; | |
1188 | ||
1f855824 AM |
1189 | static struct platform_driver ab8500_btemp_driver = { |
1190 | .probe = ab8500_btemp_probe, | |
28ea73f4 | 1191 | .remove = ab8500_btemp_remove, |
1f855824 AM |
1192 | .suspend = ab8500_btemp_suspend, |
1193 | .resume = ab8500_btemp_resume, | |
1194 | .driver = { | |
1195 | .name = "ab8500-btemp", | |
1196 | .owner = THIS_MODULE, | |
bd9e8ab2 | 1197 | .of_match_table = ab8500_btemp_match, |
1f855824 AM |
1198 | }, |
1199 | }; | |
1200 | ||
1201 | static int __init ab8500_btemp_init(void) | |
1202 | { | |
1203 | return platform_driver_register(&ab8500_btemp_driver); | |
1204 | } | |
1205 | ||
1206 | static void __exit ab8500_btemp_exit(void) | |
1207 | { | |
1208 | platform_driver_unregister(&ab8500_btemp_driver); | |
1209 | } | |
1210 | ||
eeb0751c | 1211 | device_initcall(ab8500_btemp_init); |
1f855824 AM |
1212 | module_exit(ab8500_btemp_exit); |
1213 | ||
1214 | MODULE_LICENSE("GPL v2"); | |
1215 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
1216 | MODULE_ALIAS("platform:ab8500-btemp"); | |
1217 | MODULE_DESCRIPTION("AB8500 battery temperature driver"); |