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0376148f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1f855824 AM |
2 | /* |
3 | * Copyright (C) ST-Ericsson SA 2012 | |
4 | * | |
5 | * Battery temperature driver for AB8500 | |
6 | * | |
1f855824 AM |
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> | |
1c1f13a0 | 16 | #include <linux/component.h> |
1f855824 AM |
17 | #include <linux/interrupt.h> |
18 | #include <linux/delay.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/power_supply.h> | |
22 | #include <linux/completion.h> | |
23 | #include <linux/workqueue.h> | |
bd9e8ab2 R |
24 | #include <linux/jiffies.h> |
25 | #include <linux/of.h> | |
26 | #include <linux/mfd/core.h> | |
1f855824 | 27 | #include <linux/mfd/abx500.h> |
bd9e8ab2 | 28 | #include <linux/mfd/abx500/ab8500.h> |
2b0e7ac0 | 29 | #include <linux/thermal.h> |
0a8686e3 | 30 | #include <linux/iio/consumer.h> |
f8205474 | 31 | #include <linux/fixp-arith.h> |
1f855824 | 32 | |
417c0fc2 LW |
33 | #include "ab8500-bm.h" |
34 | ||
1f855824 AM |
35 | #define BTEMP_THERMAL_LOW_LIMIT -10 |
36 | #define BTEMP_THERMAL_MED_LIMIT 0 | |
37 | #define BTEMP_THERMAL_HIGH_LIMIT_52 52 | |
38 | #define BTEMP_THERMAL_HIGH_LIMIT_57 57 | |
39 | #define BTEMP_THERMAL_HIGH_LIMIT_62 62 | |
40 | ||
41 | #define BTEMP_BATCTRL_CURR_SRC_7UA 7 | |
42 | #define BTEMP_BATCTRL_CURR_SRC_20UA 20 | |
43 | ||
e6aac611 MJ |
44 | #define BTEMP_BATCTRL_CURR_SRC_16UA 16 |
45 | #define BTEMP_BATCTRL_CURR_SRC_18UA 18 | |
46 | ||
861a30da LJ |
47 | #define BTEMP_BATCTRL_CURR_SRC_60UA 60 |
48 | #define BTEMP_BATCTRL_CURR_SRC_120UA 120 | |
49 | ||
1f855824 AM |
50 | /** |
51 | * struct ab8500_btemp_interrupts - ab8500 interrupts | |
52 | * @name: name of the interrupt | |
53 | * @isr function pointer to the isr | |
54 | */ | |
55 | struct ab8500_btemp_interrupts { | |
56 | char *name; | |
57 | irqreturn_t (*isr)(int irq, void *data); | |
58 | }; | |
59 | ||
60 | struct ab8500_btemp_events { | |
61 | bool batt_rem; | |
62 | bool btemp_high; | |
63 | bool btemp_medhigh; | |
64 | bool btemp_lowmed; | |
65 | bool btemp_low; | |
66 | bool ac_conn; | |
67 | bool usb_conn; | |
68 | }; | |
69 | ||
70 | struct ab8500_btemp_ranges { | |
71 | int btemp_high_limit; | |
72 | int btemp_med_limit; | |
73 | int btemp_low_limit; | |
74 | }; | |
75 | ||
76 | /** | |
77 | * struct ab8500_btemp - ab8500 BTEMP device information | |
78 | * @dev: Pointer to the structure device | |
79 | * @node: List of AB8500 BTEMPs, hence prepared for reentrance | |
80 | * @curr_source: What current source we use, in uA | |
c56ca24a CIK |
81 | * @bat_temp: Dispatched battery temperature in degree Celsius |
82 | * @prev_bat_temp Last measured battery temperature in degree Celsius | |
1f855824 | 83 | * @parent: Pointer to the struct ab8500 |
2b0e7ac0 | 84 | * @tz: Thermal zone for the battery |
0a8686e3 | 85 | * @adc_bat_ctrl: ADC channel for the battery control |
1f855824 | 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; | |
2b0e7ac0 | 102 | struct thermal_zone_device *tz; |
0a8686e3 | 103 | struct iio_channel *bat_ctrl; |
1f855824 | 104 | struct ab8500_fg *fg; |
484a9cc3 | 105 | struct ab8500_bm_data *bm; |
297d716f | 106 | struct power_supply *btemp_psy; |
1f855824 AM |
107 | struct ab8500_btemp_events events; |
108 | struct ab8500_btemp_ranges btemp_ranges; | |
109 | struct workqueue_struct *btemp_wq; | |
110 | struct delayed_work btemp_periodic_work; | |
f6271b4f | 111 | bool initialized; |
1f855824 AM |
112 | }; |
113 | ||
114 | /* BTEMP power supply properties */ | |
115 | static enum power_supply_property ab8500_btemp_props[] = { | |
116 | POWER_SUPPLY_PROP_PRESENT, | |
117 | POWER_SUPPLY_PROP_ONLINE, | |
1f855824 AM |
118 | POWER_SUPPLY_PROP_TEMP, |
119 | }; | |
120 | ||
121 | static LIST_HEAD(ab8500_btemp_list); | |
122 | ||
1f855824 AM |
123 | /** |
124 | * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance | |
125 | * @di: pointer to the ab8500_btemp structure | |
126 | * @v_batctrl: measured batctrl voltage | |
127 | * @inst_curr: measured instant current | |
128 | * | |
129 | * This function returns the battery resistance that is | |
130 | * derived from the BATCTRL voltage. | |
131 | * Returns value in Ohms. | |
132 | */ | |
133 | static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, | |
134 | int v_batctrl, int inst_curr) | |
135 | { | |
1f855824 AM |
136 | if (is_ab8500_1p1_or_earlier(di->parent)) { |
137 | /* | |
138 | * For ABB cut1.0 and 1.1 BAT_CTRL is internally | |
139 | * connected to 1.8V through a 450k resistor | |
140 | */ | |
141 | return (450000 * (v_batctrl)) / (1800 - v_batctrl); | |
142 | } | |
143 | ||
d58964be LW |
144 | /* |
145 | * BAT_CTRL is internally | |
146 | * connected to 1.8V through a 80k resistor | |
147 | */ | |
148 | return (80000 * (v_batctrl)) / (1800 - v_batctrl); | |
1f855824 AM |
149 | } |
150 | ||
151 | /** | |
152 | * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage | |
153 | * @di: pointer to the ab8500_btemp structure | |
154 | * | |
155 | * This function returns the voltage on BATCTRL. Returns value in mV. | |
156 | */ | |
157 | static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) | |
158 | { | |
0a8686e3 | 159 | int vbtemp, ret; |
1f855824 AM |
160 | static int prev; |
161 | ||
0a8686e3 LW |
162 | ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp); |
163 | if (ret < 0) { | |
1f855824 | 164 | dev_err(di->dev, |
0a8686e3 | 165 | "%s ADC conversion failed, using previous value", |
1f855824 AM |
166 | __func__); |
167 | return prev; | |
168 | } | |
169 | prev = vbtemp; | |
170 | return vbtemp; | |
171 | } | |
172 | ||
1f855824 AM |
173 | /** |
174 | * ab8500_btemp_get_batctrl_res() - get battery resistance | |
175 | * @di: pointer to the ab8500_btemp structure | |
176 | * | |
177 | * This function returns the battery pack identification resistance. | |
178 | * Returns value in Ohms. | |
179 | */ | |
180 | static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) | |
181 | { | |
182 | int ret; | |
183 | int batctrl = 0; | |
184 | int res; | |
185 | int inst_curr; | |
186 | int i; | |
187 | ||
1f855824 AM |
188 | if (!di->fg) |
189 | di->fg = ab8500_fg_get(); | |
190 | if (!di->fg) { | |
191 | dev_err(di->dev, "No fg found\n"); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | ret = ab8500_fg_inst_curr_start(di->fg); | |
196 | ||
197 | if (ret) { | |
198 | dev_err(di->dev, "Failed to start current measurement\n"); | |
199 | return ret; | |
200 | } | |
201 | ||
3988a4df JB |
202 | do { |
203 | msleep(20); | |
204 | } while (!ab8500_fg_inst_curr_started(di->fg)); | |
205 | ||
1f855824 AM |
206 | i = 0; |
207 | ||
208 | do { | |
209 | batctrl += ab8500_btemp_read_batctrl_voltage(di); | |
210 | i++; | |
211 | msleep(20); | |
212 | } while (!ab8500_fg_inst_curr_done(di->fg)); | |
213 | batctrl /= i; | |
214 | ||
215 | ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); | |
216 | if (ret) { | |
217 | dev_err(di->dev, "Failed to finalize current measurement\n"); | |
218 | return ret; | |
219 | } | |
220 | ||
221 | res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); | |
222 | ||
1f855824 AM |
223 | dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", |
224 | __func__, batctrl, res, inst_curr, i); | |
225 | ||
226 | return res; | |
227 | } | |
228 | ||
1f855824 AM |
229 | /** |
230 | * ab8500_btemp_id() - Identify the connected battery | |
231 | * @di: pointer to the ab8500_btemp structure | |
232 | * | |
233 | * This function will try to identify the battery by reading the ID | |
234 | * resistor. Some brands use a combined ID resistor with a NTC resistor to | |
235 | * both be able to identify and to read the temperature of it. | |
236 | */ | |
237 | static int ab8500_btemp_id(struct ab8500_btemp *di) | |
238 | { | |
1f918e0f | 239 | struct power_supply_battery_info *bi = di->bm->bi; |
1f855824 | 240 | int res; |
1f855824 | 241 | |
4c4268dc | 242 | di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; |
1f855824 AM |
243 | |
244 | res = ab8500_btemp_get_batctrl_res(di); | |
245 | if (res < 0) { | |
246 | dev_err(di->dev, "%s get batctrl res failed\n", __func__); | |
247 | return -ENXIO; | |
248 | } | |
249 | ||
1f918e0f LW |
250 | if (power_supply_battery_bti_in_range(bi, res)) { |
251 | dev_info(di->dev, "Battery detected on BATCTRL (pin C3)" | |
252 | " resistance %d Ohm = %d Ohm +/- %d%%\n", | |
253 | res, bi->bti_resistance_ohm, | |
254 | bi->bti_resistance_tolerance); | |
e5dff305 | 255 | } else { |
1f855824 | 256 | dev_warn(di->dev, "Battery identified as unknown" |
e5dff305 | 257 | ", resistance %d Ohm\n", res); |
1f855824 AM |
258 | return -ENXIO; |
259 | } | |
260 | ||
e5dff305 | 261 | return 0; |
1f855824 AM |
262 | } |
263 | ||
264 | /** | |
265 | * ab8500_btemp_periodic_work() - Measuring the temperature periodically | |
266 | * @work: pointer to the work_struct structure | |
267 | * | |
268 | * Work function for measuring the temperature periodically | |
269 | */ | |
270 | static void ab8500_btemp_periodic_work(struct work_struct *work) | |
271 | { | |
272 | int interval; | |
908fe8d6 | 273 | int bat_temp; |
1f855824 AM |
274 | struct ab8500_btemp *di = container_of(work, |
275 | struct ab8500_btemp, btemp_periodic_work.work); | |
2b0e7ac0 LW |
276 | /* Assume 25 degrees celsius as start temperature */ |
277 | static int prev = 25; | |
278 | int ret; | |
1f855824 | 279 | |
f6271b4f | 280 | if (!di->initialized) { |
f6271b4f JA |
281 | /* Identify the battery */ |
282 | if (ab8500_btemp_id(di) < 0) | |
283 | dev_warn(di->dev, "failed to identify the battery\n"); | |
284 | } | |
285 | ||
2b0e7ac0 LW |
286 | /* Failover if a reading is erroneous, use last meausurement */ |
287 | ret = thermal_zone_get_temp(di->tz, &bat_temp); | |
288 | if (ret) { | |
289 | dev_err(di->dev, "error reading temperature\n"); | |
290 | bat_temp = prev; | |
291 | } else { | |
292 | /* Convert from millicentigrades to centigrades */ | |
293 | bat_temp /= 1000; | |
294 | prev = bat_temp; | |
295 | } | |
296 | ||
908fe8d6 HB |
297 | /* |
298 | * Filter battery temperature. | |
299 | * Allow direct updates on temperature only if two samples result in | |
300 | * same temperature. Else only allow 1 degree change from previous | |
301 | * reported value in the direction of the new measurement. | |
302 | */ | |
2c4c40ac RK |
303 | if ((bat_temp == di->prev_bat_temp) || !di->initialized) { |
304 | if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { | |
305 | di->initialized = true; | |
908fe8d6 | 306 | di->bat_temp = bat_temp; |
297d716f | 307 | power_supply_changed(di->btemp_psy); |
908fe8d6 HB |
308 | } |
309 | } else if (bat_temp < di->prev_bat_temp) { | |
310 | di->bat_temp--; | |
297d716f | 311 | power_supply_changed(di->btemp_psy); |
908fe8d6 HB |
312 | } else if (bat_temp > di->prev_bat_temp) { |
313 | di->bat_temp++; | |
297d716f | 314 | power_supply_changed(di->btemp_psy); |
1f855824 | 315 | } |
908fe8d6 | 316 | di->prev_bat_temp = bat_temp; |
1f855824 AM |
317 | |
318 | if (di->events.ac_conn || di->events.usb_conn) | |
b0284de0 | 319 | interval = di->bm->temp_interval_chg; |
1f855824 | 320 | else |
b0284de0 | 321 | interval = di->bm->temp_interval_nochg; |
1f855824 AM |
322 | |
323 | /* Schedule a new measurement */ | |
324 | queue_delayed_work(di->btemp_wq, | |
325 | &di->btemp_periodic_work, | |
326 | round_jiffies(interval * HZ)); | |
327 | } | |
328 | ||
329 | /** | |
330 | * ab8500_btemp_batctrlindb_handler() - battery removal detected | |
331 | * @irq: interrupt number | |
332 | * @_di: void pointer that has to address of ab8500_btemp | |
333 | * | |
334 | * Returns IRQ status(IRQ_HANDLED) | |
335 | */ | |
336 | static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) | |
337 | { | |
338 | struct ab8500_btemp *di = _di; | |
339 | dev_err(di->dev, "Battery removal detected!\n"); | |
340 | ||
341 | di->events.batt_rem = true; | |
297d716f | 342 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
343 | |
344 | return IRQ_HANDLED; | |
345 | } | |
346 | ||
347 | /** | |
348 | * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees | |
349 | * @irq: interrupt number | |
350 | * @_di: void pointer that has to address of ab8500_btemp | |
351 | * | |
352 | * Returns IRQ status(IRQ_HANDLED) | |
353 | */ | |
354 | static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) | |
355 | { | |
356 | struct ab8500_btemp *di = _di; | |
357 | ||
d36e3e6d | 358 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 | 359 | dev_dbg(di->dev, "Ignore false btemp low irq" |
d36e3e6d | 360 | " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); |
1f855824 AM |
361 | } else { |
362 | dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); | |
363 | ||
364 | di->events.btemp_low = true; | |
365 | di->events.btemp_high = false; | |
366 | di->events.btemp_medhigh = false; | |
367 | di->events.btemp_lowmed = false; | |
297d716f | 368 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
369 | } |
370 | ||
371 | return IRQ_HANDLED; | |
372 | } | |
373 | ||
374 | /** | |
375 | * ab8500_btemp_temphigh_handler() - battery temp higher than max temp | |
376 | * @irq: interrupt number | |
377 | * @_di: void pointer that has to address of ab8500_btemp | |
378 | * | |
379 | * Returns IRQ status(IRQ_HANDLED) | |
380 | */ | |
381 | static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) | |
382 | { | |
383 | struct ab8500_btemp *di = _di; | |
384 | ||
385 | dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); | |
386 | ||
387 | di->events.btemp_high = true; | |
388 | di->events.btemp_medhigh = false; | |
389 | di->events.btemp_lowmed = false; | |
390 | di->events.btemp_low = false; | |
297d716f | 391 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
392 | |
393 | return IRQ_HANDLED; | |
394 | } | |
395 | ||
396 | /** | |
397 | * ab8500_btemp_lowmed_handler() - battery temp between low and medium | |
398 | * @irq: interrupt number | |
399 | * @_di: void pointer that has to address of ab8500_btemp | |
400 | * | |
401 | * Returns IRQ status(IRQ_HANDLED) | |
402 | */ | |
403 | static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) | |
404 | { | |
405 | struct ab8500_btemp *di = _di; | |
406 | ||
407 | dev_dbg(di->dev, "Battery temperature is between low and medium\n"); | |
408 | ||
409 | di->events.btemp_lowmed = true; | |
410 | di->events.btemp_medhigh = false; | |
411 | di->events.btemp_high = false; | |
412 | di->events.btemp_low = false; | |
297d716f | 413 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
414 | |
415 | return IRQ_HANDLED; | |
416 | } | |
417 | ||
418 | /** | |
419 | * ab8500_btemp_medhigh_handler() - battery temp between medium and high | |
420 | * @irq: interrupt number | |
421 | * @_di: void pointer that has to address of ab8500_btemp | |
422 | * | |
423 | * Returns IRQ status(IRQ_HANDLED) | |
424 | */ | |
425 | static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) | |
426 | { | |
427 | struct ab8500_btemp *di = _di; | |
428 | ||
429 | dev_dbg(di->dev, "Battery temperature is between medium and high\n"); | |
430 | ||
431 | di->events.btemp_medhigh = true; | |
432 | di->events.btemp_lowmed = false; | |
433 | di->events.btemp_high = false; | |
434 | di->events.btemp_low = false; | |
297d716f | 435 | power_supply_changed(di->btemp_psy); |
1f855824 AM |
436 | |
437 | return IRQ_HANDLED; | |
438 | } | |
439 | ||
440 | /** | |
441 | * ab8500_btemp_periodic() - Periodic temperature measurements | |
442 | * @di: pointer to the ab8500_btemp structure | |
443 | * @enable: enable or disable periodic temperature measurements | |
444 | * | |
445 | * Starts of stops periodic temperature measurements. Periodic measurements | |
446 | * should only be done when a charger is connected. | |
447 | */ | |
448 | static void ab8500_btemp_periodic(struct ab8500_btemp *di, | |
449 | bool enable) | |
450 | { | |
451 | dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", | |
452 | enable); | |
453 | /* | |
454 | * Make sure a new measurement is done directly by cancelling | |
455 | * any pending work | |
456 | */ | |
457 | cancel_delayed_work_sync(&di->btemp_periodic_work); | |
458 | ||
459 | if (enable) | |
460 | queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); | |
461 | } | |
462 | ||
463 | /** | |
464 | * ab8500_btemp_get_temp() - get battery temperature | |
465 | * @di: pointer to the ab8500_btemp structure | |
466 | * | |
467 | * Returns battery temperature | |
468 | */ | |
417c0fc2 | 469 | static int ab8500_btemp_get_temp(struct ab8500_btemp *di) |
1f855824 AM |
470 | { |
471 | int temp = 0; | |
472 | ||
473 | /* | |
d36e3e6d | 474 | * The BTEMP events are not reliabe on AB8500 cut3.3 |
1f855824 AM |
475 | * and prior versions |
476 | */ | |
d36e3e6d | 477 | if (is_ab8500_3p3_or_earlier(di->parent)) { |
1f855824 AM |
478 | temp = di->bat_temp * 10; |
479 | } else { | |
480 | if (di->events.btemp_low) { | |
481 | if (temp > di->btemp_ranges.btemp_low_limit) | |
5b41aa9f | 482 | temp = di->btemp_ranges.btemp_low_limit * 10; |
1f855824 AM |
483 | else |
484 | temp = di->bat_temp * 10; | |
485 | } else if (di->events.btemp_high) { | |
486 | if (temp < di->btemp_ranges.btemp_high_limit) | |
5b41aa9f | 487 | temp = di->btemp_ranges.btemp_high_limit * 10; |
1f855824 AM |
488 | else |
489 | temp = di->bat_temp * 10; | |
490 | } else if (di->events.btemp_lowmed) { | |
491 | if (temp > di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 492 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
493 | else |
494 | temp = di->bat_temp * 10; | |
495 | } else if (di->events.btemp_medhigh) { | |
496 | if (temp < di->btemp_ranges.btemp_med_limit) | |
5b41aa9f | 497 | temp = di->btemp_ranges.btemp_med_limit * 10; |
1f855824 AM |
498 | else |
499 | temp = di->bat_temp * 10; | |
500 | } else | |
501 | temp = di->bat_temp * 10; | |
502 | } | |
503 | return temp; | |
504 | } | |
1f855824 AM |
505 | |
506 | /** | |
507 | * ab8500_btemp_get_property() - get the btemp properties | |
508 | * @psy: pointer to the power_supply structure | |
509 | * @psp: pointer to the power_supply_property structure | |
510 | * @val: pointer to the power_supply_propval union | |
511 | * | |
512 | * This function gets called when an application tries to get the btemp | |
513 | * properties by reading the sysfs files. | |
514 | * online: presence of the battery | |
515 | * present: presence of the battery | |
516 | * technology: battery technology | |
517 | * temp: battery temperature | |
518 | * Returns error code in case of failure else 0(on success) | |
519 | */ | |
520 | static int ab8500_btemp_get_property(struct power_supply *psy, | |
521 | enum power_supply_property psp, | |
522 | union power_supply_propval *val) | |
523 | { | |
297d716f | 524 | struct ab8500_btemp *di = power_supply_get_drvdata(psy); |
1f855824 AM |
525 | |
526 | switch (psp) { | |
527 | case POWER_SUPPLY_PROP_PRESENT: | |
528 | case POWER_SUPPLY_PROP_ONLINE: | |
529 | if (di->events.batt_rem) | |
530 | val->intval = 0; | |
531 | else | |
532 | val->intval = 1; | |
533 | break; | |
1f855824 AM |
534 | case POWER_SUPPLY_PROP_TEMP: |
535 | val->intval = ab8500_btemp_get_temp(di); | |
536 | break; | |
537 | default: | |
538 | return -EINVAL; | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | ||
543 | static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) | |
544 | { | |
545 | struct power_supply *psy; | |
ea32cea1 AS |
546 | struct power_supply *ext = dev_get_drvdata(dev); |
547 | const char **supplicants = (const char **)ext->supplied_to; | |
1f855824 AM |
548 | struct ab8500_btemp *di; |
549 | union power_supply_propval ret; | |
ea32cea1 | 550 | int j; |
1f855824 AM |
551 | |
552 | psy = (struct power_supply *)data; | |
297d716f | 553 | di = power_supply_get_drvdata(psy); |
1f855824 AM |
554 | |
555 | /* | |
556 | * For all psy where the name of your driver | |
557 | * appears in any supplied_to | |
558 | */ | |
ea32cea1 AS |
559 | j = match_string(supplicants, ext->num_supplicants, psy->desc->name); |
560 | if (j < 0) | |
1f855824 AM |
561 | return 0; |
562 | ||
563 | /* Go through all properties for the psy */ | |
297d716f | 564 | for (j = 0; j < ext->desc->num_properties; j++) { |
1f855824 | 565 | enum power_supply_property prop; |
297d716f | 566 | prop = ext->desc->properties[j]; |
1f855824 | 567 | |
15077fc1 | 568 | if (power_supply_get_property(ext, prop, &ret)) |
1f855824 AM |
569 | continue; |
570 | ||
571 | switch (prop) { | |
572 | case POWER_SUPPLY_PROP_PRESENT: | |
297d716f | 573 | switch (ext->desc->type) { |
1f855824 AM |
574 | case POWER_SUPPLY_TYPE_MAINS: |
575 | /* AC disconnected */ | |
576 | if (!ret.intval && di->events.ac_conn) { | |
577 | di->events.ac_conn = false; | |
578 | } | |
579 | /* AC connected */ | |
580 | else if (ret.intval && !di->events.ac_conn) { | |
581 | di->events.ac_conn = true; | |
582 | if (!di->events.usb_conn) | |
583 | ab8500_btemp_periodic(di, true); | |
584 | } | |
585 | break; | |
586 | case POWER_SUPPLY_TYPE_USB: | |
587 | /* USB disconnected */ | |
588 | if (!ret.intval && di->events.usb_conn) { | |
589 | di->events.usb_conn = false; | |
590 | } | |
591 | /* USB connected */ | |
592 | else if (ret.intval && !di->events.usb_conn) { | |
593 | di->events.usb_conn = true; | |
594 | if (!di->events.ac_conn) | |
595 | ab8500_btemp_periodic(di, true); | |
596 | } | |
597 | break; | |
598 | default: | |
599 | break; | |
600 | } | |
601 | break; | |
602 | default: | |
603 | break; | |
604 | } | |
605 | } | |
606 | return 0; | |
607 | } | |
608 | ||
609 | /** | |
610 | * ab8500_btemp_external_power_changed() - callback for power supply changes | |
611 | * @psy: pointer to the structure power_supply | |
612 | * | |
613 | * This function is pointing to the function pointer external_power_changed | |
614 | * of the structure power_supply. | |
615 | * This function gets executed when there is a change in the external power | |
616 | * supply to the btemp. | |
617 | */ | |
618 | static void ab8500_btemp_external_power_changed(struct power_supply *psy) | |
619 | { | |
a5299ce4 HG |
620 | class_for_each_device(power_supply_class, NULL, psy, |
621 | ab8500_btemp_get_ext_psy_data); | |
1f855824 AM |
622 | } |
623 | ||
624 | /* ab8500 btemp driver interrupts and their respective isr */ | |
625 | static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { | |
626 | {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, | |
627 | {"BTEMP_LOW", ab8500_btemp_templow_handler}, | |
628 | {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, | |
629 | {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, | |
630 | {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, | |
631 | }; | |
632 | ||
f8efa0a8 | 633 | static int __maybe_unused ab8500_btemp_resume(struct device *dev) |
1f855824 | 634 | { |
f8efa0a8 | 635 | struct ab8500_btemp *di = dev_get_drvdata(dev); |
1f855824 AM |
636 | |
637 | ab8500_btemp_periodic(di, true); | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
f8efa0a8 | 642 | static int __maybe_unused ab8500_btemp_suspend(struct device *dev) |
1f855824 | 643 | { |
f8efa0a8 | 644 | struct ab8500_btemp *di = dev_get_drvdata(dev); |
1f855824 AM |
645 | |
646 | ab8500_btemp_periodic(di, false); | |
647 | ||
648 | return 0; | |
649 | } | |
1f855824 | 650 | |
bd9e8ab2 R |
651 | static char *supply_interface[] = { |
652 | "ab8500_chargalg", | |
653 | "ab8500_fg", | |
654 | }; | |
655 | ||
297d716f KK |
656 | static const struct power_supply_desc ab8500_btemp_desc = { |
657 | .name = "ab8500_btemp", | |
dc77721e | 658 | .type = POWER_SUPPLY_TYPE_UNKNOWN, |
297d716f KK |
659 | .properties = ab8500_btemp_props, |
660 | .num_properties = ARRAY_SIZE(ab8500_btemp_props), | |
661 | .get_property = ab8500_btemp_get_property, | |
662 | .external_power_changed = ab8500_btemp_external_power_changed, | |
663 | }; | |
664 | ||
1c1f13a0 LW |
665 | static int ab8500_btemp_bind(struct device *dev, struct device *master, |
666 | void *data) | |
667 | { | |
668 | struct ab8500_btemp *di = dev_get_drvdata(dev); | |
669 | ||
670 | /* Create a work queue for the btemp */ | |
671 | di->btemp_wq = | |
672 | alloc_workqueue("ab8500_btemp_wq", WQ_MEM_RECLAIM, 0); | |
673 | if (di->btemp_wq == NULL) { | |
674 | dev_err(dev, "failed to create work queue\n"); | |
675 | return -ENOMEM; | |
676 | } | |
677 | ||
678 | /* Kick off periodic temperature measurements */ | |
679 | ab8500_btemp_periodic(di, true); | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | static void ab8500_btemp_unbind(struct device *dev, struct device *master, | |
685 | void *data) | |
686 | { | |
687 | struct ab8500_btemp *di = dev_get_drvdata(dev); | |
688 | ||
689 | /* Delete the work queue */ | |
690 | destroy_workqueue(di->btemp_wq); | |
1c1f13a0 LW |
691 | } |
692 | ||
693 | static const struct component_ops ab8500_btemp_component_ops = { | |
694 | .bind = ab8500_btemp_bind, | |
695 | .unbind = ab8500_btemp_unbind, | |
696 | }; | |
697 | ||
c8afa640 | 698 | static int ab8500_btemp_probe(struct platform_device *pdev) |
1f855824 | 699 | { |
2dc9215d | 700 | struct power_supply_config psy_cfg = {}; |
ad89cb5f | 701 | struct device *dev = &pdev->dev; |
e0f1abeb | 702 | struct ab8500_btemp *di; |
1f855824 AM |
703 | int irq, i, ret = 0; |
704 | u8 val; | |
2aac3de1 | 705 | |
ad89cb5f LW |
706 | di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); |
707 | if (!di) | |
1f855824 | 708 | return -ENOMEM; |
95820245 | 709 | |
417c0fc2 | 710 | di->bm = &ab8500_bm_data; |
95820245 | 711 | |
1f855824 | 712 | /* get parent data */ |
ad89cb5f | 713 | di->dev = dev; |
1f855824 | 714 | di->parent = dev_get_drvdata(pdev->dev.parent); |
0a8686e3 | 715 | |
2b0e7ac0 LW |
716 | /* Get thermal zone and ADC */ |
717 | di->tz = thermal_zone_get_zone_by_name("battery-thermal"); | |
718 | if (IS_ERR(di->tz)) { | |
767e6843 LW |
719 | ret = PTR_ERR(di->tz); |
720 | /* | |
721 | * This usually just means we are probing before the thermal | |
722 | * zone, so just defer. | |
723 | */ | |
724 | if (ret == -ENODEV) | |
725 | ret = -EPROBE_DEFER; | |
726 | return dev_err_probe(dev, ret, | |
2b0e7ac0 | 727 | "failed to get battery thermal zone\n"); |
0a8686e3 | 728 | } |
ad89cb5f | 729 | di->bat_ctrl = devm_iio_channel_get(dev, "bat_ctrl"); |
0a8686e3 | 730 | if (IS_ERR(di->bat_ctrl)) { |
36f1de0d LW |
731 | ret = dev_err_probe(dev, PTR_ERR(di->bat_ctrl), |
732 | "failed to get BAT CTRL ADC channel\n"); | |
733 | return ret; | |
0a8686e3 | 734 | } |
1f855824 | 735 | |
f6271b4f JA |
736 | di->initialized = false; |
737 | ||
2dc9215d KK |
738 | psy_cfg.supplied_to = supply_interface; |
739 | psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); | |
297d716f | 740 | psy_cfg.drv_data = di; |
1f855824 | 741 | |
1f855824 | 742 | /* Init work for measuring temperature periodically */ |
203b42f7 | 743 | INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, |
1f855824 AM |
744 | ab8500_btemp_periodic_work); |
745 | ||
1f855824 | 746 | /* Set BTEMP thermal limits. Low and Med are fixed */ |
0cdaf9a9 HB |
747 | di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; |
748 | di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; | |
1f855824 | 749 | |
ad89cb5f | 750 | ret = abx500_get_register_interruptible(dev, AB8500_CHARGER, |
1f855824 AM |
751 | AB8500_BTEMP_HIGH_TH, &val); |
752 | if (ret < 0) { | |
ad89cb5f | 753 | dev_err(dev, "%s ab8500 read failed\n", __func__); |
1c1f13a0 | 754 | return ret; |
1f855824 AM |
755 | } |
756 | switch (val) { | |
757 | case BTEMP_HIGH_TH_57_0: | |
758 | case BTEMP_HIGH_TH_57_1: | |
759 | di->btemp_ranges.btemp_high_limit = | |
760 | BTEMP_THERMAL_HIGH_LIMIT_57; | |
761 | break; | |
762 | case BTEMP_HIGH_TH_52: | |
763 | di->btemp_ranges.btemp_high_limit = | |
764 | BTEMP_THERMAL_HIGH_LIMIT_52; | |
765 | break; | |
766 | case BTEMP_HIGH_TH_62: | |
767 | di->btemp_ranges.btemp_high_limit = | |
768 | BTEMP_THERMAL_HIGH_LIMIT_62; | |
769 | break; | |
770 | } | |
771 | ||
772 | /* Register BTEMP power supply class */ | |
1c1f13a0 LW |
773 | di->btemp_psy = devm_power_supply_register(dev, &ab8500_btemp_desc, |
774 | &psy_cfg); | |
297d716f | 775 | if (IS_ERR(di->btemp_psy)) { |
ad89cb5f | 776 | dev_err(dev, "failed to register BTEMP psy\n"); |
1c1f13a0 | 777 | return PTR_ERR(di->btemp_psy); |
1f855824 AM |
778 | } |
779 | ||
780 | /* Register interrupts */ | |
781 | for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { | |
782 | irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); | |
1c1f13a0 LW |
783 | if (irq < 0) |
784 | return irq; | |
b10e9700 | 785 | |
1c1f13a0 LW |
786 | ret = devm_request_threaded_irq(dev, irq, NULL, |
787 | ab8500_btemp_irq[i].isr, | |
df12470c | 788 | IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, |
1f855824 AM |
789 | ab8500_btemp_irq[i].name, di); |
790 | ||
791 | if (ret) { | |
ad89cb5f | 792 | dev_err(dev, "failed to request %s IRQ %d: %d\n" |
1f855824 | 793 | , ab8500_btemp_irq[i].name, irq, ret); |
1c1f13a0 | 794 | return ret; |
1f855824 | 795 | } |
ad89cb5f | 796 | dev_dbg(dev, "Requested %s IRQ %d: %d\n", |
1f855824 AM |
797 | ab8500_btemp_irq[i].name, irq, ret); |
798 | } | |
799 | ||
800 | platform_set_drvdata(pdev, di); | |
801 | ||
1f855824 AM |
802 | list_add_tail(&di->node, &ab8500_btemp_list); |
803 | ||
1c1f13a0 LW |
804 | return component_add(dev, &ab8500_btemp_component_ops); |
805 | } | |
1f855824 | 806 | |
1c1f13a0 LW |
807 | static int ab8500_btemp_remove(struct platform_device *pdev) |
808 | { | |
809 | component_del(&pdev->dev, &ab8500_btemp_component_ops); | |
ccc023a5 | 810 | |
1c1f13a0 | 811 | return 0; |
1f855824 AM |
812 | } |
813 | ||
f8efa0a8 LW |
814 | static SIMPLE_DEV_PM_OPS(ab8500_btemp_pm_ops, ab8500_btemp_suspend, ab8500_btemp_resume); |
815 | ||
bd9e8ab2 R |
816 | static const struct of_device_id ab8500_btemp_match[] = { |
817 | { .compatible = "stericsson,ab8500-btemp", }, | |
818 | { }, | |
819 | }; | |
dfe52db1 | 820 | MODULE_DEVICE_TABLE(of, ab8500_btemp_match); |
bd9e8ab2 | 821 | |
1c1f13a0 | 822 | struct platform_driver ab8500_btemp_driver = { |
1f855824 | 823 | .probe = ab8500_btemp_probe, |
28ea73f4 | 824 | .remove = ab8500_btemp_remove, |
1f855824 AM |
825 | .driver = { |
826 | .name = "ab8500-btemp", | |
bd9e8ab2 | 827 | .of_match_table = ab8500_btemp_match, |
f8efa0a8 | 828 | .pm = &ab8500_btemp_pm_ops, |
1f855824 AM |
829 | }, |
830 | }; | |
1f855824 AM |
831 | MODULE_LICENSE("GPL v2"); |
832 | MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); | |
833 | MODULE_ALIAS("platform:ab8500-btemp"); | |
834 | MODULE_DESCRIPTION("AB8500 battery temperature driver"); |