Commit | Line | Data |
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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 | /** |
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; |
297d716f | 102 | struct power_supply *btemp_psy; |
1f855824 AM |
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 | } | |
6f780965 | 131 | EXPORT_SYMBOL(ab8500_btemp_get); |
1f855824 AM |
132 | |
133 | /** | |
134 | * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance | |
135 | * @di: pointer to the ab8500_btemp structure | |
136 | * @v_batctrl: measured batctrl voltage | |
137 | * @inst_curr: measured instant current | |
138 | * | |
139 | * This function returns the battery resistance that is | |
140 | * derived from the BATCTRL voltage. | |
141 | * Returns value in Ohms. | |
142 | */ | |
143 | static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, | |
144 | int v_batctrl, int inst_curr) | |
145 | { | |
146 | int rbs; | |
147 | ||
148 | if (is_ab8500_1p1_or_earlier(di->parent)) { | |
149 | /* | |
150 | * For ABB cut1.0 and 1.1 BAT_CTRL is internally | |
151 | * connected to 1.8V through a 450k resistor | |
152 | */ | |
153 | return (450000 * (v_batctrl)) / (1800 - v_batctrl); | |
154 | } | |
155 | ||
b0284de0 | 156 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL) { |
1f855824 AM |
157 | /* |
158 | * If the battery has internal NTC, we use the current | |
7a2cf9ba | 159 | * source to calculate the resistance. |
1f855824 AM |
160 | */ |
161 | rbs = (v_batctrl * 1000 | |
b0284de0 | 162 | - di->bm->gnd_lift_resistance * inst_curr) |
1f855824 AM |
163 | / di->curr_source; |
164 | } else { | |
165 | /* | |
166 | * BAT_CTRL is internally | |
167 | * connected to 1.8V through a 80k resistor | |
168 | */ | |
169 | rbs = (80000 * (v_batctrl)) / (1800 - v_batctrl); | |
170 | } | |
171 | ||
172 | return rbs; | |
173 | } | |
174 | ||
175 | /** | |
176 | * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage | |
177 | * @di: pointer to the ab8500_btemp structure | |
178 | * | |
179 | * This function returns the voltage on BATCTRL. Returns value in mV. | |
180 | */ | |
181 | static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) | |
182 | { | |
183 | int vbtemp; | |
184 | static int prev; | |
185 | ||
186 | vbtemp = ab8500_gpadc_convert(di->gpadc, BAT_CTRL); | |
187 | if (vbtemp < 0) { | |
188 | dev_err(di->dev, | |
189 | "%s gpadc conversion failed, using previous value", | |
190 | __func__); | |
191 | return prev; | |
192 | } | |
193 | prev = vbtemp; | |
194 | return vbtemp; | |
195 | } | |
196 | ||
197 | /** | |
198 | * ab8500_btemp_curr_source_enable() - enable/disable batctrl current source | |
199 | * @di: pointer to the ab8500_btemp structure | |
200 | * @enable: enable or disable the current source | |
201 | * | |
202 | * Enable or disable the current sources for the BatCtrl AD channel | |
203 | */ | |
204 | static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di, | |
205 | bool enable) | |
206 | { | |
207 | int curr; | |
208 | int ret = 0; | |
209 | ||
210 | /* | |
211 | * BATCTRL current sources are included on AB8500 cut2.0 | |
212 | * and future versions | |
213 | */ | |
214 | if (is_ab8500_1p1_or_earlier(di->parent)) | |
215 | return 0; | |
216 | ||
217 | /* Only do this for batteries with internal NTC */ | |
b0284de0 | 218 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && enable) { |
e6aac611 | 219 | |
861a30da LJ |
220 | if (is_ab8540(di->parent)) { |
221 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_60UA) | |
222 | curr = BAT_CTRL_60U_ENA; | |
223 | else | |
224 | curr = BAT_CTRL_120U_ENA; | |
225 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
e6aac611 MJ |
226 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_16UA) |
227 | curr = BAT_CTRL_16U_ENA; | |
228 | else | |
229 | curr = BAT_CTRL_18U_ENA; | |
230 | } else { | |
231 | if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_7UA) | |
232 | curr = BAT_CTRL_7U_ENA; | |
233 | else | |
234 | curr = BAT_CTRL_20U_ENA; | |
235 | } | |
1f855824 AM |
236 | |
237 | dev_dbg(di->dev, "Set BATCTRL %duA\n", di->curr_source); | |
238 | ||
239 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
240 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
241 | FORCE_BAT_CTRL_CMP_HIGH, FORCE_BAT_CTRL_CMP_HIGH); | |
242 | if (ret) { | |
243 | dev_err(di->dev, "%s failed setting cmp_force\n", | |
244 | __func__); | |
245 | return ret; | |
246 | } | |
247 | ||
248 | /* | |
249 | * We have to wait one 32kHz cycle before enabling | |
250 | * the current source, since ForceBatCtrlCmpHigh needs | |
251 | * to be written in a separate cycle | |
252 | */ | |
253 | udelay(32); | |
254 | ||
255 | ret = abx500_set_register_interruptible(di->dev, | |
256 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
257 | FORCE_BAT_CTRL_CMP_HIGH | curr); | |
258 | if (ret) { | |
259 | dev_err(di->dev, "%s failed enabling current source\n", | |
260 | __func__); | |
261 | goto disable_curr_source; | |
262 | } | |
b0284de0 | 263 | } else if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && !enable) { |
1f855824 AM |
264 | dev_dbg(di->dev, "Disable BATCTRL curr source\n"); |
265 | ||
861a30da LJ |
266 | if (is_ab8540(di->parent)) { |
267 | /* Write 0 to the curr bits */ | |
268 | ret = abx500_mask_and_set_register_interruptible( | |
269 | di->dev, | |
270 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
271 | BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA, | |
272 | ~(BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA)); | |
273 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
e6aac611 MJ |
274 | /* Write 0 to the curr bits */ |
275 | ret = abx500_mask_and_set_register_interruptible( | |
276 | di->dev, | |
277 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
278 | BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA, | |
279 | ~(BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA)); | |
280 | } else { | |
281 | /* Write 0 to the curr bits */ | |
282 | ret = abx500_mask_and_set_register_interruptible( | |
283 | di->dev, | |
284 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
285 | BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, | |
286 | ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); | |
287 | } | |
288 | ||
1f855824 AM |
289 | if (ret) { |
290 | dev_err(di->dev, "%s failed disabling current source\n", | |
291 | __func__); | |
292 | goto disable_curr_source; | |
293 | } | |
294 | ||
295 | /* Enable Pull-Up and comparator */ | |
296 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
297 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
298 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, | |
299 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); | |
300 | if (ret) { | |
301 | dev_err(di->dev, "%s failed enabling PU and comp\n", | |
302 | __func__); | |
303 | goto enable_pu_comp; | |
304 | } | |
305 | ||
306 | /* | |
307 | * We have to wait one 32kHz cycle before disabling | |
308 | * ForceBatCtrlCmpHigh since this needs to be written | |
309 | * in a separate cycle | |
310 | */ | |
311 | udelay(32); | |
312 | ||
313 | /* Disable 'force comparator' */ | |
314 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
315 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
316 | FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); | |
317 | if (ret) { | |
318 | dev_err(di->dev, "%s failed disabling force comp\n", | |
319 | __func__); | |
320 | goto disable_force_comp; | |
321 | } | |
322 | } | |
323 | return ret; | |
324 | ||
325 | /* | |
326 | * We have to try unsetting FORCE_BAT_CTRL_CMP_HIGH one more time | |
327 | * if we got an error above | |
328 | */ | |
329 | disable_curr_source: | |
861a30da LJ |
330 | if (is_ab8540(di->parent)) { |
331 | /* Write 0 to the curr bits */ | |
332 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
333 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
334 | BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA, | |
335 | ~(BAT_CTRL_60U_ENA | BAT_CTRL_120U_ENA)); | |
336 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
e6aac611 MJ |
337 | /* Write 0 to the curr bits */ |
338 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
339 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
340 | BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA, | |
341 | ~(BAT_CTRL_16U_ENA | BAT_CTRL_18U_ENA)); | |
342 | } else { | |
343 | /* Write 0 to the curr bits */ | |
344 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
1f855824 AM |
345 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, |
346 | BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, | |
347 | ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); | |
e6aac611 MJ |
348 | } |
349 | ||
1f855824 AM |
350 | if (ret) { |
351 | dev_err(di->dev, "%s failed disabling current source\n", | |
352 | __func__); | |
353 | return ret; | |
354 | } | |
355 | enable_pu_comp: | |
356 | /* Enable Pull-Up and comparator */ | |
357 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
358 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
359 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, | |
360 | BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); | |
361 | if (ret) { | |
362 | dev_err(di->dev, "%s failed enabling PU and comp\n", | |
363 | __func__); | |
364 | return ret; | |
365 | } | |
366 | ||
367 | disable_force_comp: | |
368 | /* | |
369 | * We have to wait one 32kHz cycle before disabling | |
370 | * ForceBatCtrlCmpHigh since this needs to be written | |
371 | * in a separate cycle | |
372 | */ | |
373 | udelay(32); | |
374 | ||
375 | /* Disable 'force comparator' */ | |
376 | ret = abx500_mask_and_set_register_interruptible(di->dev, | |
377 | AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, | |
378 | FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); | |
379 | if (ret) { | |
380 | dev_err(di->dev, "%s failed disabling force comp\n", | |
381 | __func__); | |
382 | return ret; | |
383 | } | |
384 | ||
385 | return ret; | |
386 | } | |
387 | ||
388 | /** | |
389 | * ab8500_btemp_get_batctrl_res() - get battery resistance | |
390 | * @di: pointer to the ab8500_btemp structure | |
391 | * | |
392 | * This function returns the battery pack identification resistance. | |
393 | * Returns value in Ohms. | |
394 | */ | |
395 | static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) | |
396 | { | |
397 | int ret; | |
398 | int batctrl = 0; | |
399 | int res; | |
400 | int inst_curr; | |
401 | int i; | |
402 | ||
403 | /* | |
404 | * BATCTRL current sources are included on AB8500 cut2.0 | |
405 | * and future versions | |
406 | */ | |
407 | ret = ab8500_btemp_curr_source_enable(di, true); | |
408 | if (ret) { | |
409 | dev_err(di->dev, "%s curr source enabled failed\n", __func__); | |
410 | return ret; | |
411 | } | |
412 | ||
413 | if (!di->fg) | |
414 | di->fg = ab8500_fg_get(); | |
415 | if (!di->fg) { | |
416 | dev_err(di->dev, "No fg found\n"); | |
417 | return -EINVAL; | |
418 | } | |
419 | ||
420 | ret = ab8500_fg_inst_curr_start(di->fg); | |
421 | ||
422 | if (ret) { | |
423 | dev_err(di->dev, "Failed to start current measurement\n"); | |
424 | return ret; | |
425 | } | |
426 | ||
3988a4df JB |
427 | do { |
428 | msleep(20); | |
429 | } while (!ab8500_fg_inst_curr_started(di->fg)); | |
430 | ||
1f855824 AM |
431 | i = 0; |
432 | ||
433 | do { | |
434 | batctrl += ab8500_btemp_read_batctrl_voltage(di); | |
435 | i++; | |
436 | msleep(20); | |
437 | } while (!ab8500_fg_inst_curr_done(di->fg)); | |
438 | batctrl /= i; | |
439 | ||
440 | ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); | |
441 | if (ret) { | |
442 | dev_err(di->dev, "Failed to finalize current measurement\n"); | |
443 | return ret; | |
444 | } | |
445 | ||
446 | res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); | |
447 | ||
448 | ret = ab8500_btemp_curr_source_enable(di, false); | |
449 | if (ret) { | |
450 | dev_err(di->dev, "%s curr source disable failed\n", __func__); | |
451 | return ret; | |
452 | } | |
453 | ||
454 | dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", | |
455 | __func__, batctrl, res, inst_curr, i); | |
456 | ||
457 | return res; | |
458 | } | |
459 | ||
460 | /** | |
461 | * ab8500_btemp_res_to_temp() - resistance to temperature | |
462 | * @di: pointer to the ab8500_btemp structure | |
463 | * @tbl: pointer to the resiatance to temperature table | |
464 | * @tbl_size: size of the resistance to temperature table | |
465 | * @res: resistance to calculate the temperature from | |
466 | * | |
467 | * This function returns the battery temperature in degrees Celcius | |
468 | * based on the NTC resistance. | |
469 | */ | |
470 | static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di, | |
471 | const struct abx500_res_to_temp *tbl, int tbl_size, int res) | |
472 | { | |
473 | int i, temp; | |
474 | /* | |
475 | * Calculate the formula for the straight line | |
476 | * Simple interpolation if we are within | |
477 | * the resistance table limits, extrapolate | |
478 | * if resistance is outside the limits. | |
479 | */ | |
480 | if (res > tbl[0].resist) | |
481 | i = 0; | |
482 | else if (res <= tbl[tbl_size - 1].resist) | |
483 | i = tbl_size - 2; | |
484 | else { | |
485 | i = 0; | |
486 | while (!(res <= tbl[i].resist && | |
487 | res > tbl[i + 1].resist)) | |
488 | i++; | |
489 | } | |
490 | ||
491 | temp = tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) * | |
492 | (res - tbl[i].resist)) / (tbl[i + 1].resist - tbl[i].resist); | |
493 | return temp; | |
494 | } | |
495 | ||
496 | /** | |
497 | * ab8500_btemp_measure_temp() - measure battery temperature | |
498 | * @di: pointer to the ab8500_btemp structure | |
499 | * | |
500 | * Returns battery temperature (on success) else the previous temperature | |
501 | */ | |
502 | static int ab8500_btemp_measure_temp(struct ab8500_btemp *di) | |
503 | { | |
504 | int temp; | |
505 | static int prev; | |
506 | int rbat, rntc, vntc; | |
507 | u8 id; | |
508 | ||
b0284de0 | 509 | id = di->bm->batt_id; |
1f855824 | 510 | |
b0284de0 | 511 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && |
1f855824 AM |
512 | id != BATTERY_UNKNOWN) { |
513 | ||
514 | rbat = ab8500_btemp_get_batctrl_res(di); | |
515 | if (rbat < 0) { | |
516 | dev_err(di->dev, "%s get batctrl res failed\n", | |
517 | __func__); | |
518 | /* | |
519 | * Return out-of-range temperature so that | |
520 | * charging is stopped | |
521 | */ | |
522 | return BTEMP_THERMAL_LOW_LIMIT; | |
523 | } | |
524 | ||
525 | temp = ab8500_btemp_res_to_temp(di, | |
b0284de0 LJ |
526 | di->bm->bat_type[id].r_to_t_tbl, |
527 | di->bm->bat_type[id].n_temp_tbl_elements, rbat); | |
1f855824 AM |
528 | } else { |
529 | vntc = ab8500_gpadc_convert(di->gpadc, BTEMP_BALL); | |
530 | if (vntc < 0) { | |
531 | dev_err(di->dev, | |
532 | "%s gpadc conversion failed," | |
533 | " using previous value\n", __func__); | |
534 | return prev; | |
535 | } | |
536 | /* | |
537 | * The PCB NTC is sourced from VTVOUT via a 230kOhm | |
538 | * resistor. | |
539 | */ | |
540 | rntc = 230000 * vntc / (VTVOUT_V - vntc); | |
541 | ||
542 | temp = ab8500_btemp_res_to_temp(di, | |
b0284de0 LJ |
543 | di->bm->bat_type[id].r_to_t_tbl, |
544 | di->bm->bat_type[id].n_temp_tbl_elements, rntc); | |
1f855824 AM |
545 | prev = temp; |
546 | } | |
547 | dev_dbg(di->dev, "Battery temperature is %d\n", temp); | |
548 | return temp; | |
549 | } | |
550 | ||
551 | /** | |
552 | * ab8500_btemp_id() - Identify the connected battery | |
553 | * @di: pointer to the ab8500_btemp structure | |
554 | * | |
555 | * This function will try to identify the battery by reading the ID | |
556 | * resistor. Some brands use a combined ID resistor with a NTC resistor to | |
557 | * both be able to identify and to read the temperature of it. | |
558 | */ | |
559 | static int ab8500_btemp_id(struct ab8500_btemp *di) | |
560 | { | |
561 | int res; | |
562 | u8 i; | |
861a30da LJ |
563 | if (is_ab8540(di->parent)) |
564 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_60UA; | |
565 | else if (is_ab9540(di->parent) || is_ab8505(di->parent)) | |
e6aac611 MJ |
566 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA; |
567 | else | |
568 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; | |
1f855824 | 569 | |
b0284de0 | 570 | di->bm->batt_id = BATTERY_UNKNOWN; |
1f855824 AM |
571 | |
572 | res = ab8500_btemp_get_batctrl_res(di); | |
573 | if (res < 0) { | |
574 | dev_err(di->dev, "%s get batctrl res failed\n", __func__); | |
575 | return -ENXIO; | |
576 | } | |
577 | ||
578 | /* BATTERY_UNKNOWN is defined on position 0, skip it! */ | |
b0284de0 LJ |
579 | for (i = BATTERY_UNKNOWN + 1; i < di->bm->n_btypes; i++) { |
580 | if ((res <= di->bm->bat_type[i].resis_high) && | |
581 | (res >= di->bm->bat_type[i].resis_low)) { | |
1f855824 AM |
582 | dev_dbg(di->dev, "Battery detected on %s" |
583 | " low %d < res %d < high: %d" | |
584 | " index: %d\n", | |
b0284de0 | 585 | di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL ? |
1f855824 | 586 | "BATCTRL" : "BATTEMP", |
b0284de0 LJ |
587 | di->bm->bat_type[i].resis_low, res, |
588 | di->bm->bat_type[i].resis_high, i); | |
1f855824 | 589 | |
b0284de0 | 590 | di->bm->batt_id = i; |
1f855824 AM |
591 | break; |
592 | } | |
593 | } | |
594 | ||
b0284de0 | 595 | if (di->bm->batt_id == BATTERY_UNKNOWN) { |
1f855824 AM |
596 | dev_warn(di->dev, "Battery identified as unknown" |
597 | ", resistance %d Ohm\n", res); | |
598 | return -ENXIO; | |
599 | } | |
600 | ||
601 | /* | |
602 | * We only have to change current source if the | |
7a2cf9ba | 603 | * detected type is Type 1. |
1f855824 | 604 | */ |
b0284de0 | 605 | if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && |
861a30da LJ |
606 | di->bm->batt_id == 1) { |
607 | if (is_ab8540(di->parent)) { | |
608 | dev_dbg(di->dev, | |
609 | "Set BATCTRL current source to 60uA\n"); | |
610 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_60UA; | |
611 | } else if (is_ab9540(di->parent) || is_ab8505(di->parent)) { | |
612 | dev_dbg(di->dev, | |
613 | "Set BATCTRL current source to 16uA\n"); | |
e6aac611 MJ |
614 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_16UA; |
615 | } else { | |
616 | dev_dbg(di->dev, "Set BATCTRL current source to 20uA\n"); | |
617 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_20UA; | |
618 | } | |
1f855824 AM |
619 | } |
620 | ||
b0284de0 | 621 | return di->bm->batt_id; |
1f855824 AM |
622 | } |
623 | ||
624 | /** | |
625 | * ab8500_btemp_periodic_work() - Measuring the temperature periodically | |
626 | * @work: pointer to the work_struct structure | |
627 | * | |
628 | * Work function for measuring the temperature periodically | |
629 | */ | |
630 | static void ab8500_btemp_periodic_work(struct work_struct *work) | |
631 | { | |
632 | int interval; | |
908fe8d6 | 633 | int bat_temp; |
1f855824 AM |
634 | struct ab8500_btemp *di = container_of(work, |
635 | struct ab8500_btemp, btemp_periodic_work.work); | |
636 | ||
f6271b4f | 637 | if (!di->initialized) { |
f6271b4f JA |
638 | /* Identify the battery */ |
639 | if (ab8500_btemp_id(di) < 0) | |
640 | dev_warn(di->dev, "failed to identify the battery\n"); | |
641 | } | |
642 | ||
908fe8d6 HB |
643 | bat_temp = ab8500_btemp_measure_temp(di); |
644 | /* | |
645 | * Filter battery temperature. | |
646 | * Allow direct updates on temperature only if two samples result in | |
647 | * same temperature. Else only allow 1 degree change from previous | |
648 | * reported value in the direction of the new measurement. | |
649 | */ | |
2c4c40ac RK |
650 | if ((bat_temp == di->prev_bat_temp) || !di->initialized) { |
651 | if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { | |
652 | di->initialized = true; | |
908fe8d6 | 653 | di->bat_temp = bat_temp; |
297d716f | 654 | power_supply_changed(di->btemp_psy); |
908fe8d6 HB |
655 | } |
656 | } else if (bat_temp < di->prev_bat_temp) { | |
657 | di->bat_temp--; | |
297d716f | 658 | power_supply_changed(di->btemp_psy); |
908fe8d6 HB |
659 | } else if (bat_temp > di->prev_bat_temp) { |
660 | di->bat_temp++; | |
297d716f | 661 | power_supply_changed(di->btemp_psy); |
1f855824 | 662 | } |
908fe8d6 | 663 | di->prev_bat_temp = bat_temp; |
1f855824 AM |
664 | |
665 | if (di->events.ac_conn || di->events.usb_conn) | |
b0284de0 | 666 | interval = di->bm->temp_interval_chg; |
1f855824 | 667 | else |
b0284de0 | 668 | interval = di->bm->temp_interval_nochg; |
1f855824 AM |
669 | |
670 | /* Schedule a new measurement */ | |
671 | queue_delayed_work(di->btemp_wq, | |
672 | &di->btemp_periodic_work, | |
673 | round_jiffies(interval * HZ)); | |
674 | } | |
675 | ||
676 | /** | |
677 | * ab8500_btemp_batctrlindb_handler() - battery removal detected | |
678 | * @irq: interrupt number | |
679 | * @_di: void pointer that has to address of ab8500_btemp | |
680 | * | |
681 | * Returns IRQ status(IRQ_HANDLED) | |
682 | */ | |
683 | static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) | |
684 | { | |
685 | struct ab8500_btemp *di = _di; | |
686 | dev_err(di->dev, "Battery removal detected!\n"); | |
687 | ||
688 | di->events.batt_rem = true; | |
297d716f | 689 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
690 | |
691 | return IRQ_HANDLED; | |
692 | } | |
693 | ||
694 | /** | |
695 | * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees | |
696 | * @irq: interrupt number | |
697 | * @_di: void pointer that has to address of ab8500_btemp | |
698 | * | |
699 | * Returns IRQ status(IRQ_HANDLED) | |
700 | */ | |
701 | static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) | |
702 | { | |
703 | struct ab8500_btemp *di = _di; | |
704 | ||
d36e3e6d | 705 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 | 706 | dev_dbg(di->dev, "Ignore false btemp low irq" |
d36e3e6d | 707 | " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); |
1f855824 AM |
708 | } else { |
709 | dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); | |
710 | ||
711 | di->events.btemp_low = true; | |
712 | di->events.btemp_high = false; | |
713 | di->events.btemp_medhigh = false; | |
714 | di->events.btemp_lowmed = false; | |
297d716f | 715 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
716 | } |
717 | ||
718 | return IRQ_HANDLED; | |
719 | } | |
720 | ||
721 | /** | |
722 | * ab8500_btemp_temphigh_handler() - battery temp higher than max temp | |
723 | * @irq: interrupt number | |
724 | * @_di: void pointer that has to address of ab8500_btemp | |
725 | * | |
726 | * Returns IRQ status(IRQ_HANDLED) | |
727 | */ | |
728 | static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) | |
729 | { | |
730 | struct ab8500_btemp *di = _di; | |
731 | ||
732 | dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); | |
733 | ||
734 | di->events.btemp_high = true; | |
735 | di->events.btemp_medhigh = false; | |
736 | di->events.btemp_lowmed = false; | |
737 | di->events.btemp_low = false; | |
297d716f | 738 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
739 | |
740 | return IRQ_HANDLED; | |
741 | } | |
742 | ||
743 | /** | |
744 | * ab8500_btemp_lowmed_handler() - battery temp between low and medium | |
745 | * @irq: interrupt number | |
746 | * @_di: void pointer that has to address of ab8500_btemp | |
747 | * | |
748 | * Returns IRQ status(IRQ_HANDLED) | |
749 | */ | |
750 | static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) | |
751 | { | |
752 | struct ab8500_btemp *di = _di; | |
753 | ||
754 | dev_dbg(di->dev, "Battery temperature is between low and medium\n"); | |
755 | ||
756 | di->events.btemp_lowmed = true; | |
757 | di->events.btemp_medhigh = false; | |
758 | di->events.btemp_high = false; | |
759 | di->events.btemp_low = false; | |
297d716f | 760 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
761 | |
762 | return IRQ_HANDLED; | |
763 | } | |
764 | ||
765 | /** | |
766 | * ab8500_btemp_medhigh_handler() - battery temp between medium and high | |
767 | * @irq: interrupt number | |
768 | * @_di: void pointer that has to address of ab8500_btemp | |
769 | * | |
770 | * Returns IRQ status(IRQ_HANDLED) | |
771 | */ | |
772 | static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) | |
773 | { | |
774 | struct ab8500_btemp *di = _di; | |
775 | ||
776 | dev_dbg(di->dev, "Battery temperature is between medium and high\n"); | |
777 | ||
778 | di->events.btemp_medhigh = true; | |
779 | di->events.btemp_lowmed = false; | |
780 | di->events.btemp_high = false; | |
781 | di->events.btemp_low = false; | |
297d716f | 782 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
783 | |
784 | return IRQ_HANDLED; | |
785 | } | |
786 | ||
787 | /** | |
788 | * ab8500_btemp_periodic() - Periodic temperature measurements | |
789 | * @di: pointer to the ab8500_btemp structure | |
790 | * @enable: enable or disable periodic temperature measurements | |
791 | * | |
792 | * Starts of stops periodic temperature measurements. Periodic measurements | |
793 | * should only be done when a charger is connected. | |
794 | */ | |
795 | static void ab8500_btemp_periodic(struct ab8500_btemp *di, | |
796 | bool enable) | |
797 | { | |
798 | dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", | |
799 | enable); | |
800 | /* | |
801 | * Make sure a new measurement is done directly by cancelling | |
802 | * any pending work | |
803 | */ | |
804 | cancel_delayed_work_sync(&di->btemp_periodic_work); | |
805 | ||
806 | if (enable) | |
807 | queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); | |
808 | } | |
809 | ||
810 | /** | |
811 | * ab8500_btemp_get_temp() - get battery temperature | |
812 | * @di: pointer to the ab8500_btemp structure | |
813 | * | |
814 | * Returns battery temperature | |
815 | */ | |
6f780965 | 816 | int ab8500_btemp_get_temp(struct ab8500_btemp *di) |
1f855824 AM |
817 | { |
818 | int temp = 0; | |
819 | ||
820 | /* | |
d36e3e6d | 821 | * The BTEMP events are not reliabe on AB8500 cut3.3 |
1f855824 AM |
822 | * and prior versions |
823 | */ | |
d36e3e6d | 824 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 AM |
825 | temp = di->bat_temp * 10; |
826 | } else { | |
827 | if (di->events.btemp_low) { | |
828 | if (temp > di->btemp_ranges.btemp_low_limit) | |
5b41aa9f | 829 | temp = di->btemp_ranges.btemp_low_limit * 10; |
1f855824 AM |
830 | else |
831 | temp = di->bat_temp * 10; | |
832 | } else if (di->events.btemp_high) { | |
833 | if (temp < di->btemp_ranges.btemp_high_limit) | |
5b41aa9f | 834 | temp = di->btemp_ranges.btemp_high_limit * 10; |
1f855824 AM |
835 | else |
836 | temp = di->bat_temp * 10; | |
837 | } else if (di->events.btemp_lowmed) { | |
838 | if (temp > di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 839 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
840 | else |
841 | temp = di->bat_temp * 10; | |
842 | } else if (di->events.btemp_medhigh) { | |
843 | if (temp < di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 844 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
845 | else |
846 | temp = di->bat_temp * 10; | |
847 | } else | |
848 | temp = di->bat_temp * 10; | |
849 | } | |
850 | return temp; | |
851 | } | |
6f780965 | 852 | EXPORT_SYMBOL(ab8500_btemp_get_temp); |
1f855824 AM |
853 | |
854 | /** | |
855 | * ab8500_btemp_get_batctrl_temp() - get the temperature | |
856 | * @btemp: pointer to the btemp structure | |
857 | * | |
858 | * Returns the batctrl temperature in millidegrees | |
859 | */ | |
860 | int ab8500_btemp_get_batctrl_temp(struct ab8500_btemp *btemp) | |
861 | { | |
862 | return btemp->bat_temp * 1000; | |
863 | } | |
6f780965 | 864 | EXPORT_SYMBOL(ab8500_btemp_get_batctrl_temp); |
1f855824 AM |
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 | { | |
297d716f | 884 | struct ab8500_btemp *di = power_supply_get_drvdata(psy); |
1f855824 AM |
885 | |
886 | switch (psp) { | |
887 | case POWER_SUPPLY_PROP_PRESENT: | |
888 | case POWER_SUPPLY_PROP_ONLINE: | |
889 | if (di->events.batt_rem) | |
890 | val->intval = 0; | |
891 | else | |
892 | val->intval = 1; | |
893 | break; | |
894 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
b0284de0 | 895 | val->intval = di->bm->bat_type[di->bm->batt_id].name; |
1f855824 AM |
896 | break; |
897 | case POWER_SUPPLY_PROP_TEMP: | |
898 | val->intval = ab8500_btemp_get_temp(di); | |
899 | break; | |
900 | default: | |
901 | return -EINVAL; | |
902 | } | |
903 | return 0; | |
904 | } | |
905 | ||
906 | static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) | |
907 | { | |
908 | struct power_supply *psy; | |
ea32cea1 AS |
909 | struct power_supply *ext = dev_get_drvdata(dev); |
910 | const char **supplicants = (const char **)ext->supplied_to; | |
1f855824 AM |
911 | struct ab8500_btemp *di; |
912 | union power_supply_propval ret; | |
ea32cea1 | 913 | int j; |
1f855824 AM |
914 | |
915 | psy = (struct power_supply *)data; | |
297d716f | 916 | di = power_supply_get_drvdata(psy); |
1f855824 AM |
917 | |
918 | /* | |
919 | * For all psy where the name of your driver | |
920 | * appears in any supplied_to | |
921 | */ | |
ea32cea1 AS |
922 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
923 | if (j < 0) | |
1f855824 AM |
924 | return 0; |
925 | ||
926 | /* Go through all properties for the psy */ | |
297d716f | 927 | for (j = 0; j < ext->desc->num_properties; j++) { |
1f855824 | 928 | enum power_supply_property prop; |
297d716f | 929 | prop = ext->desc->properties[j]; |
1f855824 | 930 | |
15077fc1 | 931 | if (power_supply_get_property(ext, prop, &ret)) |
1f855824 AM |
932 | continue; |
933 | ||
934 | switch (prop) { | |
935 | case POWER_SUPPLY_PROP_PRESENT: | |
297d716f | 936 | switch (ext->desc->type) { |
1f855824 AM |
937 | case POWER_SUPPLY_TYPE_MAINS: |
938 | /* AC disconnected */ | |
939 | if (!ret.intval && di->events.ac_conn) { | |
940 | di->events.ac_conn = false; | |
941 | } | |
942 | /* AC connected */ | |
943 | else if (ret.intval && !di->events.ac_conn) { | |
944 | di->events.ac_conn = true; | |
945 | if (!di->events.usb_conn) | |
946 | ab8500_btemp_periodic(di, true); | |
947 | } | |
948 | break; | |
949 | case POWER_SUPPLY_TYPE_USB: | |
950 | /* USB disconnected */ | |
951 | if (!ret.intval && di->events.usb_conn) { | |
952 | di->events.usb_conn = false; | |
953 | } | |
954 | /* USB connected */ | |
955 | else if (ret.intval && !di->events.usb_conn) { | |
956 | di->events.usb_conn = true; | |
957 | if (!di->events.ac_conn) | |
958 | ab8500_btemp_periodic(di, true); | |
959 | } | |
960 | break; | |
961 | default: | |
962 | break; | |
963 | } | |
964 | break; | |
965 | default: | |
966 | break; | |
967 | } | |
968 | } | |
969 | return 0; | |
970 | } | |
971 | ||
972 | /** | |
973 | * ab8500_btemp_external_power_changed() - callback for power supply changes | |
974 | * @psy: pointer to the structure power_supply | |
975 | * | |
976 | * This function is pointing to the function pointer external_power_changed | |
977 | * of the structure power_supply. | |
978 | * This function gets executed when there is a change in the external power | |
979 | * supply to the btemp. | |
980 | */ | |
981 | static void ab8500_btemp_external_power_changed(struct power_supply *psy) | |
982 | { | |
297d716f | 983 | struct ab8500_btemp *di = power_supply_get_drvdata(psy); |
1f855824 AM |
984 | |
985 | class_for_each_device(power_supply_class, NULL, | |
297d716f | 986 | di->btemp_psy, ab8500_btemp_get_ext_psy_data); |
1f855824 AM |
987 | } |
988 | ||
989 | /* ab8500 btemp driver interrupts and their respective isr */ | |
990 | static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { | |
991 | {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, | |
992 | {"BTEMP_LOW", ab8500_btemp_templow_handler}, | |
993 | {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, | |
994 | {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, | |
995 | {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, | |
996 | }; | |
997 | ||
998 | #if defined(CONFIG_PM) | |
999 | static int ab8500_btemp_resume(struct platform_device *pdev) | |
1000 | { | |
1001 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1002 | ||
1003 | ab8500_btemp_periodic(di, true); | |
1004 | ||
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static int ab8500_btemp_suspend(struct platform_device *pdev, | |
1009 | pm_message_t state) | |
1010 | { | |
1011 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1012 | ||
1013 | ab8500_btemp_periodic(di, false); | |
1014 | ||
1015 | return 0; | |
1016 | } | |
1017 | #else | |
1018 | #define ab8500_btemp_suspend NULL | |
1019 | #define ab8500_btemp_resume NULL | |
1020 | #endif | |
1021 | ||
415ec69f | 1022 | static int ab8500_btemp_remove(struct platform_device *pdev) |
1f855824 AM |
1023 | { |
1024 | struct ab8500_btemp *di = platform_get_drvdata(pdev); | |
1025 | int i, irq; | |
1026 | ||
1027 | /* Disable interrupts */ | |
1028 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
1029 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1030 | free_irq(irq, di); | |
1031 | } | |
1032 | ||
1033 | /* Delete the work queue */ | |
1034 | destroy_workqueue(di->btemp_wq); | |
1035 | ||
1036 | flush_scheduled_work(); | |
297d716f | 1037 | power_supply_unregister(di->btemp_psy); |
1f855824 AM |
1038 | |
1039 | return 0; | |
1040 | } | |
1041 | ||
bd9e8ab2 R |
1042 | static char *supply_interface[] = { |
1043 | "ab8500_chargalg", | |
1044 | "ab8500_fg", | |
1045 | }; | |
1046 | ||
297d716f KK |
1047 | static const struct power_supply_desc ab8500_btemp_desc = { |
1048 | .name = "ab8500_btemp", | |
1049 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
1050 | .properties = ab8500_btemp_props, | |
1051 | .num_properties = ARRAY_SIZE(ab8500_btemp_props), | |
1052 | .get_property = ab8500_btemp_get_property, | |
1053 | .external_power_changed = ab8500_btemp_external_power_changed, | |
1054 | }; | |
1055 | ||
c8afa640 | 1056 | static int ab8500_btemp_probe(struct platform_device *pdev) |
1f855824 | 1057 | { |
bd9e8ab2 | 1058 | struct device_node *np = pdev->dev.of_node; |
95820245 | 1059 | struct abx500_bm_data *plat = pdev->dev.platform_data; |
2dc9215d | 1060 | struct power_supply_config psy_cfg = {}; |
e0f1abeb | 1061 | struct ab8500_btemp *di; |
1f855824 AM |
1062 | int irq, i, ret = 0; |
1063 | u8 val; | |
2aac3de1 | 1064 | |
bd9e8ab2 R |
1065 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
1066 | if (!di) { | |
1067 | dev_err(&pdev->dev, "%s no mem for ab8500_btemp\n", __func__); | |
1f855824 | 1068 | return -ENOMEM; |
bd9e8ab2 | 1069 | } |
95820245 LJ |
1070 | |
1071 | if (!plat) { | |
1072 | dev_err(&pdev->dev, "no battery management data supplied\n"); | |
1073 | return -EINVAL; | |
1074 | } | |
1075 | di->bm = plat; | |
1076 | ||
1077 | if (np) { | |
1078 | ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); | |
1079 | if (ret) { | |
1080 | dev_err(&pdev->dev, "failed to get battery information\n"); | |
1081 | return ret; | |
bd9e8ab2 | 1082 | } |
bd9e8ab2 | 1083 | } |
1f855824 AM |
1084 | |
1085 | /* get parent data */ | |
1086 | di->dev = &pdev->dev; | |
1087 | di->parent = dev_get_drvdata(pdev->dev.parent); | |
1088 | di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
1089 | ||
f6271b4f JA |
1090 | di->initialized = false; |
1091 | ||
2dc9215d KK |
1092 | psy_cfg.supplied_to = supply_interface; |
1093 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
297d716f | 1094 | psy_cfg.drv_data = di; |
1f855824 AM |
1095 | |
1096 | /* Create a work queue for the btemp */ | |
1097 | di->btemp_wq = | |
1098 | create_singlethread_workqueue("ab8500_btemp_wq"); | |
1099 | if (di->btemp_wq == NULL) { | |
1100 | dev_err(di->dev, "failed to create work queue\n"); | |
bd9e8ab2 | 1101 | return -ENOMEM; |
1f855824 AM |
1102 | } |
1103 | ||
1104 | /* Init work for measuring temperature periodically */ | |
203b42f7 | 1105 | INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, |
1f855824 AM |
1106 | ab8500_btemp_periodic_work); |
1107 | ||
1f855824 | 1108 | /* Set BTEMP thermal limits. Low and Med are fixed */ |
0cdaf9a9 HB |
1109 | di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; |
1110 | di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; | |
1f855824 AM |
1111 | |
1112 | ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, | |
1113 | AB8500_BTEMP_HIGH_TH, &val); | |
1114 | if (ret < 0) { | |
1115 | dev_err(di->dev, "%s ab8500 read failed\n", __func__); | |
1116 | goto free_btemp_wq; | |
1117 | } | |
1118 | switch (val) { | |
1119 | case BTEMP_HIGH_TH_57_0: | |
1120 | case BTEMP_HIGH_TH_57_1: | |
1121 | di->btemp_ranges.btemp_high_limit = | |
1122 | BTEMP_THERMAL_HIGH_LIMIT_57; | |
1123 | break; | |
1124 | case BTEMP_HIGH_TH_52: | |
1125 | di->btemp_ranges.btemp_high_limit = | |
1126 | BTEMP_THERMAL_HIGH_LIMIT_52; | |
1127 | break; | |
1128 | case BTEMP_HIGH_TH_62: | |
1129 | di->btemp_ranges.btemp_high_limit = | |
1130 | BTEMP_THERMAL_HIGH_LIMIT_62; | |
1131 | break; | |
1132 | } | |
1133 | ||
1134 | /* Register BTEMP power supply class */ | |
297d716f KK |
1135 | di->btemp_psy = power_supply_register(di->dev, &ab8500_btemp_desc, |
1136 | &psy_cfg); | |
1137 | if (IS_ERR(di->btemp_psy)) { | |
1f855824 | 1138 | dev_err(di->dev, "failed to register BTEMP psy\n"); |
297d716f | 1139 | ret = PTR_ERR(di->btemp_psy); |
1f855824 AM |
1140 | goto free_btemp_wq; |
1141 | } | |
1142 | ||
1143 | /* Register interrupts */ | |
1144 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
1145 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1146 | ret = request_threaded_irq(irq, NULL, ab8500_btemp_irq[i].isr, | |
1147 | IRQF_SHARED | IRQF_NO_SUSPEND, | |
1148 | ab8500_btemp_irq[i].name, di); | |
1149 | ||
1150 | if (ret) { | |
1151 | dev_err(di->dev, "failed to request %s IRQ %d: %d\n" | |
1152 | , ab8500_btemp_irq[i].name, irq, ret); | |
1153 | goto free_irq; | |
1154 | } | |
1155 | dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", | |
1156 | ab8500_btemp_irq[i].name, irq, ret); | |
1157 | } | |
1158 | ||
1159 | platform_set_drvdata(pdev, di); | |
1160 | ||
1161 | /* Kick off periodic temperature measurements */ | |
1162 | ab8500_btemp_periodic(di, true); | |
1163 | list_add_tail(&di->node, &ab8500_btemp_list); | |
1164 | ||
1165 | return ret; | |
1166 | ||
1167 | free_irq: | |
297d716f | 1168 | power_supply_unregister(di->btemp_psy); |
1f855824 AM |
1169 | |
1170 | /* We also have to free all successfully registered irqs */ | |
1171 | for (i = i - 1; i >= 0; i--) { | |
1172 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1173 | free_irq(irq, di); | |
1174 | } | |
1175 | free_btemp_wq: | |
1176 | destroy_workqueue(di->btemp_wq); | |
1f855824 AM |
1177 | return ret; |
1178 | } | |
1179 | ||
bd9e8ab2 R |
1180 | static const struct of_device_id ab8500_btemp_match[] = { |
1181 | { .compatible = "stericsson,ab8500-btemp", }, | |
1182 | { }, | |
1183 | }; | |
1184 | ||
1f855824 AM |
1185 | static struct platform_driver ab8500_btemp_driver = { |
1186 | .probe = ab8500_btemp_probe, | |
28ea73f4 | 1187 | .remove = ab8500_btemp_remove, |
1f855824 AM |
1188 | .suspend = ab8500_btemp_suspend, |
1189 | .resume = ab8500_btemp_resume, | |
1190 | .driver = { | |
1191 | .name = "ab8500-btemp", | |
bd9e8ab2 | 1192 | .of_match_table = ab8500_btemp_match, |
1f855824 AM |
1193 | }, |
1194 | }; | |
1195 | ||
1196 | static int __init ab8500_btemp_init(void) | |
1197 | { | |
1198 | return platform_driver_register(&ab8500_btemp_driver); | |
1199 | } | |
1200 | ||
1201 | static void __exit ab8500_btemp_exit(void) | |
1202 | { | |
1203 | platform_driver_unregister(&ab8500_btemp_driver); | |
1204 | } | |
1205 | ||
eeb0751c | 1206 | device_initcall(ab8500_btemp_init); |
1f855824 AM |
1207 | module_exit(ab8500_btemp_exit); |
1208 | ||
1209 | MODULE_LICENSE("GPL v2"); | |
1210 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
1211 | MODULE_ALIAS("platform:ab8500-btemp"); | |
1212 | MODULE_DESCRIPTION("AB8500 battery temperature driver"); |