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01ec8c54 | 1 | /* |
01ec8c54 MJ |
2 | * Copyright 2012 ST Ericsson. |
3 | * | |
2fa5b0f4 LJ |
4 | * Power supply driver for ST Ericsson pm2xxx_charger charger |
5 | * | |
01ec8c54 MJ |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/power_supply.h> | |
19 | #include <linux/completion.h> | |
20 | #include <linux/regulator/consumer.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/i2c.h> | |
23 | #include <linux/workqueue.h> | |
24 | #include <linux/kobject.h> | |
25 | #include <linux/mfd/abx500.h> | |
26 | #include <linux/mfd/abx500/ab8500.h> | |
27 | #include <linux/mfd/abx500/ab8500-bm.h> | |
28 | #include <linux/mfd/abx500/ab8500-gpadc.h> | |
29 | #include <linux/mfd/abx500/ux500_chargalg.h> | |
30 | #include <linux/pm2301_charger.h> | |
3988043b | 31 | #include <linux/gpio.h> |
01ec8c54 | 32 | |
2fa5b0f4 | 33 | #include "pm2301_charger.h" |
01ec8c54 MJ |
34 | |
35 | #define to_pm2xxx_charger_ac_device_info(x) container_of((x), \ | |
36 | struct pm2xxx_charger, ac_chg) | |
37 | ||
38 | static int pm2xxx_interrupt_registers[] = { | |
39 | PM2XXX_REG_INT1, | |
40 | PM2XXX_REG_INT2, | |
41 | PM2XXX_REG_INT3, | |
42 | PM2XXX_REG_INT4, | |
43 | PM2XXX_REG_INT5, | |
44 | PM2XXX_REG_INT6, | |
45 | }; | |
46 | ||
01ec8c54 MJ |
47 | static enum power_supply_property pm2xxx_charger_ac_props[] = { |
48 | POWER_SUPPLY_PROP_HEALTH, | |
49 | POWER_SUPPLY_PROP_PRESENT, | |
50 | POWER_SUPPLY_PROP_ONLINE, | |
01ec8c54 | 51 | POWER_SUPPLY_PROP_VOLTAGE_AVG, |
01ec8c54 MJ |
52 | }; |
53 | ||
54 | static int pm2xxx_charger_voltage_map[] = { | |
55 | 3500, | |
56 | 3525, | |
57 | 3550, | |
58 | 3575, | |
59 | 3600, | |
60 | 3625, | |
61 | 3650, | |
62 | 3675, | |
63 | 3700, | |
64 | 3725, | |
65 | 3750, | |
66 | 3775, | |
67 | 3800, | |
68 | 3825, | |
69 | 3850, | |
70 | 3875, | |
71 | 3900, | |
72 | 3925, | |
73 | 3950, | |
74 | 3975, | |
75 | 4000, | |
76 | 4025, | |
77 | 4050, | |
78 | 4075, | |
79 | 4100, | |
80 | 4125, | |
81 | 4150, | |
82 | 4175, | |
83 | 4200, | |
84 | 4225, | |
85 | 4250, | |
86 | 4275, | |
87 | 4300, | |
88 | }; | |
89 | ||
90 | static int pm2xxx_charger_current_map[] = { | |
91 | 200, | |
92 | 200, | |
93 | 400, | |
94 | 600, | |
95 | 800, | |
96 | 1000, | |
97 | 1200, | |
98 | 1400, | |
99 | 1600, | |
100 | 1800, | |
101 | 2000, | |
102 | 2200, | |
103 | 2400, | |
104 | 2600, | |
105 | 2800, | |
106 | 3000, | |
107 | }; | |
108 | ||
01ec8c54 MJ |
109 | static const struct i2c_device_id pm2xxx_ident[] = { |
110 | { "pm2301", 0 }, | |
111 | { } | |
112 | }; | |
113 | ||
3988043b LJ |
114 | static void set_lpn_pin(struct pm2xxx_charger *pm2) |
115 | { | |
116 | if (pm2->ac.charger_connected) | |
117 | return; | |
118 | gpio_set_value(pm2->lpn_pin, 1); | |
119 | ||
120 | return; | |
121 | } | |
122 | ||
123 | static void clear_lpn_pin(struct pm2xxx_charger *pm2) | |
124 | { | |
125 | if (pm2->ac.charger_connected) | |
126 | return; | |
127 | gpio_set_value(pm2->lpn_pin, 0); | |
128 | ||
129 | return; | |
130 | } | |
131 | ||
01ec8c54 MJ |
132 | static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val) |
133 | { | |
134 | int ret; | |
3988043b LJ |
135 | /* |
136 | * When AC adaptor is unplugged, the host | |
137 | * must put LPN high to be able to | |
138 | * communicate by I2C with PM2301 | |
139 | * and receive I2C "acknowledge" from PM2301. | |
140 | */ | |
141 | mutex_lock(&pm2->lock); | |
142 | set_lpn_pin(pm2); | |
01ec8c54 MJ |
143 | |
144 | ret = i2c_smbus_read_i2c_block_data(pm2->config.pm2xxx_i2c, reg, | |
145 | 1, val); | |
146 | if (ret < 0) | |
147 | dev_err(pm2->dev, "Error reading register at 0x%x\n", reg); | |
e41f39ea RK |
148 | else |
149 | ret = 0; | |
3988043b LJ |
150 | clear_lpn_pin(pm2); |
151 | mutex_unlock(&pm2->lock); | |
01ec8c54 MJ |
152 | |
153 | return ret; | |
154 | } | |
155 | ||
156 | static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val) | |
157 | { | |
158 | int ret; | |
3988043b LJ |
159 | /* |
160 | * When AC adaptor is unplugged, the host | |
161 | * must put LPN high to be able to | |
162 | * communicate by I2C with PM2301 | |
163 | * and receive I2C "acknowledge" from PM2301. | |
164 | */ | |
165 | mutex_lock(&pm2->lock); | |
166 | set_lpn_pin(pm2); | |
01ec8c54 MJ |
167 | |
168 | ret = i2c_smbus_write_i2c_block_data(pm2->config.pm2xxx_i2c, reg, | |
169 | 1, &val); | |
170 | if (ret < 0) | |
171 | dev_err(pm2->dev, "Error writing register at 0x%x\n", reg); | |
e41f39ea RK |
172 | else |
173 | ret = 0; | |
3988043b LJ |
174 | clear_lpn_pin(pm2); |
175 | mutex_unlock(&pm2->lock); | |
01ec8c54 MJ |
176 | |
177 | return ret; | |
178 | } | |
179 | ||
180 | static int pm2xxx_charging_enable_mngt(struct pm2xxx_charger *pm2) | |
181 | { | |
182 | int ret; | |
183 | ||
184 | /* Enable charging */ | |
185 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2, | |
186 | (PM2XXX_CH_AUTO_RESUME_EN | PM2XXX_CHARGER_ENA)); | |
187 | ||
188 | return ret; | |
189 | } | |
190 | ||
191 | static int pm2xxx_charging_disable_mngt(struct pm2xxx_charger *pm2) | |
192 | { | |
193 | int ret; | |
194 | ||
584f9703 RK |
195 | /* Disable SW EOC ctrl */ |
196 | ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_HW); | |
197 | if (ret < 0) { | |
198 | dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); | |
199 | return ret; | |
200 | } | |
201 | ||
01ec8c54 MJ |
202 | /* Disable charging */ |
203 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2, | |
204 | (PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS)); | |
584f9703 RK |
205 | if (ret < 0) { |
206 | dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); | |
207 | return ret; | |
208 | } | |
01ec8c54 | 209 | |
584f9703 | 210 | return 0; |
01ec8c54 MJ |
211 | } |
212 | ||
213 | static int pm2xxx_charger_batt_therm_mngt(struct pm2xxx_charger *pm2, int val) | |
214 | { | |
215 | queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | ||
221 | int pm2xxx_charger_die_therm_mngt(struct pm2xxx_charger *pm2, int val) | |
222 | { | |
223 | queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work); | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static int pm2xxx_charger_ovv_mngt(struct pm2xxx_charger *pm2, int val) | |
229 | { | |
789ca7b4 RK |
230 | dev_err(pm2->dev, "Overvoltage detected\n"); |
231 | pm2->flags.ovv = true; | |
232 | power_supply_changed(&pm2->ac_chg.psy); | |
01ec8c54 | 233 | |
789ca7b4 RK |
234 | /* Schedule a new HW failure check */ |
235 | queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0); | |
01ec8c54 | 236 | |
789ca7b4 | 237 | return 0; |
01ec8c54 MJ |
238 | } |
239 | ||
240 | static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val) | |
241 | { | |
242 | dev_dbg(pm2->dev , "20 minutes watchdog occured\n"); | |
243 | ||
244 | pm2->ac.wd_expired = true; | |
245 | power_supply_changed(&pm2->ac_chg.psy); | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | static int pm2xxx_charger_vbat_lsig_mngt(struct pm2xxx_charger *pm2, int val) | |
251 | { | |
584f9703 RK |
252 | int ret; |
253 | ||
01ec8c54 MJ |
254 | switch (val) { |
255 | case PM2XXX_INT1_ITVBATLOWR: | |
256 | dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n"); | |
584f9703 RK |
257 | /* Enable SW EOC ctrl */ |
258 | ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, | |
259 | PM2XXX_SWCTRL_SW); | |
260 | if (ret < 0) { | |
261 | dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); | |
262 | return ret; | |
263 | } | |
01ec8c54 MJ |
264 | break; |
265 | ||
266 | case PM2XXX_INT1_ITVBATLOWF: | |
267 | dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n"); | |
584f9703 RK |
268 | /* Disable SW EOC ctrl */ |
269 | ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, | |
270 | PM2XXX_SWCTRL_HW); | |
271 | if (ret < 0) { | |
272 | dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); | |
273 | return ret; | |
274 | } | |
01ec8c54 MJ |
275 | break; |
276 | ||
277 | default: | |
278 | dev_err(pm2->dev, "Unknown VBAT level\n"); | |
279 | } | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static int pm2xxx_charger_bat_disc_mngt(struct pm2xxx_charger *pm2, int val) | |
285 | { | |
286 | dev_dbg(pm2->dev, "battery disconnected\n"); | |
287 | ||
006f82d6 | 288 | return 0; |
01ec8c54 MJ |
289 | } |
290 | ||
291 | static int pm2xxx_charger_detection(struct pm2xxx_charger *pm2, u8 *val) | |
292 | { | |
e41f39ea | 293 | int ret; |
01ec8c54 MJ |
294 | |
295 | ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT2, val); | |
296 | ||
297 | if (ret < 0) { | |
298 | dev_err(pm2->dev, "Charger detection failed\n"); | |
299 | goto out; | |
300 | } | |
301 | ||
302 | *val &= (PM2XXX_INT2_S_ITVPWR1PLUG | PM2XXX_INT2_S_ITVPWR2PLUG); | |
e41f39ea | 303 | |
01ec8c54 MJ |
304 | out: |
305 | return ret; | |
306 | } | |
307 | ||
308 | static int pm2xxx_charger_itv_pwr_plug_mngt(struct pm2xxx_charger *pm2, int val) | |
309 | { | |
310 | ||
311 | int ret; | |
312 | u8 read_val; | |
313 | ||
314 | /* | |
315 | * Since we can't be sure that the events are received | |
316 | * synchronously, we have the check if the main charger is | |
317 | * connected by reading the interrupt source register. | |
318 | */ | |
319 | ret = pm2xxx_charger_detection(pm2, &read_val); | |
320 | ||
321 | if ((ret == 0) && read_val) { | |
322 | pm2->ac.charger_connected = 1; | |
323 | pm2->ac_conn = true; | |
324 | queue_work(pm2->charger_wq, &pm2->ac_work); | |
325 | } | |
326 | ||
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
331 | static int pm2xxx_charger_itv_pwr_unplug_mngt(struct pm2xxx_charger *pm2, | |
332 | int val) | |
333 | { | |
334 | pm2->ac.charger_connected = 0; | |
335 | queue_work(pm2->charger_wq, &pm2->ac_work); | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
006f82d6 | 340 | static int pm2_int_reg0(void *pm2_data, int val) |
01ec8c54 | 341 | { |
006f82d6 | 342 | struct pm2xxx_charger *pm2 = pm2_data; |
01ec8c54 MJ |
343 | int ret = 0; |
344 | ||
584f9703 RK |
345 | if (val & PM2XXX_INT1_ITVBATLOWR) { |
346 | ret = pm2xxx_charger_vbat_lsig_mngt(pm2, | |
347 | PM2XXX_INT1_ITVBATLOWR); | |
348 | if (ret < 0) | |
349 | goto out; | |
350 | } | |
351 | ||
352 | if (val & PM2XXX_INT1_ITVBATLOWF) { | |
353 | ret = pm2xxx_charger_vbat_lsig_mngt(pm2, | |
354 | PM2XXX_INT1_ITVBATLOWF); | |
355 | if (ret < 0) | |
356 | goto out; | |
01ec8c54 MJ |
357 | } |
358 | ||
006f82d6 | 359 | if (val & PM2XXX_INT1_ITVBATDISCONNECT) { |
01ec8c54 MJ |
360 | ret = pm2xxx_charger_bat_disc_mngt(pm2, |
361 | PM2XXX_INT1_ITVBATDISCONNECT); | |
584f9703 RK |
362 | if (ret < 0) |
363 | goto out; | |
01ec8c54 | 364 | } |
584f9703 | 365 | out: |
01ec8c54 MJ |
366 | return ret; |
367 | } | |
368 | ||
006f82d6 | 369 | static int pm2_int_reg1(void *pm2_data, int val) |
01ec8c54 | 370 | { |
006f82d6 | 371 | struct pm2xxx_charger *pm2 = pm2_data; |
01ec8c54 MJ |
372 | int ret = 0; |
373 | ||
006f82d6 | 374 | if (val & (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)) { |
01ec8c54 | 375 | dev_dbg(pm2->dev , "Main charger plugged\n"); |
006f82d6 | 376 | ret = pm2xxx_charger_itv_pwr_plug_mngt(pm2, val & |
01ec8c54 MJ |
377 | (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)); |
378 | } | |
379 | ||
006f82d6 | 380 | if (val & |
01ec8c54 MJ |
381 | (PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)) { |
382 | dev_dbg(pm2->dev , "Main charger unplugged\n"); | |
006f82d6 | 383 | ret = pm2xxx_charger_itv_pwr_unplug_mngt(pm2, val & |
01ec8c54 MJ |
384 | (PM2XXX_INT2_ITVPWR1UNPLUG | |
385 | PM2XXX_INT2_ITVPWR2UNPLUG)); | |
386 | } | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
006f82d6 | 391 | static int pm2_int_reg2(void *pm2_data, int val) |
01ec8c54 | 392 | { |
006f82d6 | 393 | struct pm2xxx_charger *pm2 = pm2_data; |
01ec8c54 MJ |
394 | int ret = 0; |
395 | ||
006f82d6 OC |
396 | if (val & PM2XXX_INT3_ITAUTOTIMEOUTWD) |
397 | ret = pm2xxx_charger_wd_exp_mngt(pm2, val); | |
01ec8c54 | 398 | |
006f82d6 | 399 | if (val & (PM2XXX_INT3_ITCHPRECHARGEWD | |
01ec8c54 MJ |
400 | PM2XXX_INT3_ITCHCCWD | PM2XXX_INT3_ITCHCVWD)) { |
401 | dev_dbg(pm2->dev, | |
402 | "Watchdog occured for precharge, CC and CV charge\n"); | |
403 | } | |
404 | ||
405 | return ret; | |
406 | } | |
407 | ||
006f82d6 | 408 | static int pm2_int_reg3(void *pm2_data, int val) |
01ec8c54 | 409 | { |
006f82d6 | 410 | struct pm2xxx_charger *pm2 = pm2_data; |
01ec8c54 MJ |
411 | int ret = 0; |
412 | ||
006f82d6 | 413 | if (val & (PM2XXX_INT4_ITCHARGINGON)) { |
01ec8c54 MJ |
414 | dev_dbg(pm2->dev , |
415 | "chargind operation has started\n"); | |
416 | } | |
417 | ||
006f82d6 | 418 | if (val & (PM2XXX_INT4_ITVRESUME)) { |
01ec8c54 MJ |
419 | dev_dbg(pm2->dev, |
420 | "battery discharged down to VResume threshold\n"); | |
421 | } | |
422 | ||
006f82d6 | 423 | if (val & (PM2XXX_INT4_ITBATTFULL)) { |
01ec8c54 MJ |
424 | dev_dbg(pm2->dev , "battery fully detected\n"); |
425 | } | |
426 | ||
006f82d6 | 427 | if (val & (PM2XXX_INT4_ITCVPHASE)) { |
01ec8c54 MJ |
428 | dev_dbg(pm2->dev, "CV phase enter with 0.5C charging\n"); |
429 | } | |
430 | ||
006f82d6 | 431 | if (val & (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)) { |
01ec8c54 | 432 | pm2->failure_case = VPWR_OVV; |
006f82d6 | 433 | ret = pm2xxx_charger_ovv_mngt(pm2, val & |
01ec8c54 MJ |
434 | (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)); |
435 | dev_dbg(pm2->dev, "VPWR/VSYSTEM overvoltage detected\n"); | |
436 | } | |
437 | ||
006f82d6 | 438 | if (val & (PM2XXX_INT4_S_ITBATTEMPCOLD | |
01ec8c54 | 439 | PM2XXX_INT4_S_ITBATTEMPHOT)) { |
006f82d6 OC |
440 | ret = pm2xxx_charger_batt_therm_mngt(pm2, val & |
441 | (PM2XXX_INT4_S_ITBATTEMPCOLD | | |
442 | PM2XXX_INT4_S_ITBATTEMPHOT)); | |
01ec8c54 MJ |
443 | dev_dbg(pm2->dev, "BTEMP is too Low/High\n"); |
444 | } | |
445 | ||
446 | return ret; | |
447 | } | |
448 | ||
006f82d6 | 449 | static int pm2_int_reg4(void *pm2_data, int val) |
01ec8c54 | 450 | { |
006f82d6 | 451 | struct pm2xxx_charger *pm2 = pm2_data; |
01ec8c54 MJ |
452 | int ret = 0; |
453 | ||
006f82d6 | 454 | if (val & PM2XXX_INT5_ITVSYSTEMOVV) { |
01ec8c54 | 455 | pm2->failure_case = VSYSTEM_OVV; |
006f82d6 | 456 | ret = pm2xxx_charger_ovv_mngt(pm2, val & |
01ec8c54 MJ |
457 | PM2XXX_INT5_ITVSYSTEMOVV); |
458 | dev_dbg(pm2->dev, "VSYSTEM overvoltage detected\n"); | |
459 | } | |
460 | ||
006f82d6 | 461 | if (val & (PM2XXX_INT5_ITTHERMALWARNINGFALL | |
01ec8c54 MJ |
462 | PM2XXX_INT5_ITTHERMALWARNINGRISE | |
463 | PM2XXX_INT5_ITTHERMALSHUTDOWNFALL | | |
464 | PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)) { | |
465 | dev_dbg(pm2->dev, "BTEMP die temperature is too Low/High\n"); | |
006f82d6 | 466 | ret = pm2xxx_charger_die_therm_mngt(pm2, val & |
01ec8c54 MJ |
467 | (PM2XXX_INT5_ITTHERMALWARNINGFALL | |
468 | PM2XXX_INT5_ITTHERMALWARNINGRISE | | |
469 | PM2XXX_INT5_ITTHERMALSHUTDOWNFALL | | |
470 | PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)); | |
471 | } | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
006f82d6 | 476 | static int pm2_int_reg5(void *pm2_data, int val) |
01ec8c54 | 477 | { |
006f82d6 OC |
478 | struct pm2xxx_charger *pm2 = pm2_data; |
479 | int ret = 0; | |
480 | ||
01ec8c54 | 481 | |
006f82d6 | 482 | if (val & (PM2XXX_INT6_ITVPWR2DROP | PM2XXX_INT6_ITVPWR1DROP)) { |
01ec8c54 MJ |
483 | dev_dbg(pm2->dev, "VMPWR drop to VBAT level\n"); |
484 | } | |
485 | ||
006f82d6 OC |
486 | if (val & (PM2XXX_INT6_ITVPWR2VALIDRISE | |
487 | PM2XXX_INT6_ITVPWR1VALIDRISE | | |
488 | PM2XXX_INT6_ITVPWR2VALIDFALL | | |
489 | PM2XXX_INT6_ITVPWR1VALIDFALL)) { | |
01ec8c54 MJ |
490 | dev_dbg(pm2->dev, "Falling/Rising edge on WPWR1/2\n"); |
491 | } | |
492 | ||
006f82d6 | 493 | return ret; |
01ec8c54 MJ |
494 | } |
495 | ||
496 | static irqreturn_t pm2xxx_irq_int(int irq, void *data) | |
497 | { | |
498 | struct pm2xxx_charger *pm2 = data; | |
006f82d6 OC |
499 | struct pm2xxx_interrupts *interrupt = pm2->pm2_int; |
500 | int i; | |
01ec8c54 | 501 | |
006f82d6 OC |
502 | for (i = 0; i < PM2XXX_NUM_INT_REG; i++) { |
503 | pm2xxx_reg_read(pm2, | |
504 | pm2xxx_interrupt_registers[i], | |
505 | &(interrupt->reg[i])); | |
01ec8c54 | 506 | |
006f82d6 OC |
507 | if (interrupt->reg[i] > 0) |
508 | interrupt->handler[i](pm2, interrupt->reg[i]); | |
509 | } | |
01ec8c54 MJ |
510 | |
511 | return IRQ_HANDLED; | |
512 | } | |
513 | ||
01ec8c54 MJ |
514 | static int pm2xxx_charger_get_ac_cv(struct pm2xxx_charger *pm2) |
515 | { | |
516 | int ret = 0; | |
517 | u8 val; | |
518 | ||
519 | if (pm2->ac.charger_connected && pm2->ac.charger_online) { | |
520 | ||
521 | ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &val); | |
522 | if (ret < 0) { | |
523 | dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); | |
524 | goto out; | |
525 | } | |
526 | ||
527 | if (val & PM2XXX_INT4_S_ITCVPHASE) | |
528 | ret = PM2XXX_CONST_VOLT; | |
529 | else | |
530 | ret = PM2XXX_CONST_CURR; | |
531 | } | |
532 | out: | |
533 | return ret; | |
534 | } | |
535 | ||
01ec8c54 MJ |
536 | static int pm2xxx_current_to_regval(int curr) |
537 | { | |
538 | int i; | |
539 | ||
540 | if (curr < pm2xxx_charger_current_map[0]) | |
541 | return 0; | |
542 | ||
543 | for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_current_map); i++) { | |
544 | if (curr < pm2xxx_charger_current_map[i]) | |
545 | return (i - 1); | |
546 | } | |
547 | ||
548 | i = ARRAY_SIZE(pm2xxx_charger_current_map) - 1; | |
549 | if (curr == pm2xxx_charger_current_map[i]) | |
550 | return i; | |
551 | else | |
552 | return -EINVAL; | |
553 | } | |
554 | ||
555 | static int pm2xxx_voltage_to_regval(int curr) | |
556 | { | |
557 | int i; | |
558 | ||
559 | if (curr < pm2xxx_charger_voltage_map[0]) | |
560 | return 0; | |
561 | ||
562 | for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_voltage_map); i++) { | |
563 | if (curr < pm2xxx_charger_voltage_map[i]) | |
564 | return i - 1; | |
565 | } | |
566 | ||
567 | i = ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1; | |
568 | if (curr == pm2xxx_charger_voltage_map[i]) | |
569 | return i; | |
570 | else | |
571 | return -EINVAL; | |
572 | } | |
573 | ||
574 | static int pm2xxx_charger_update_charger_current(struct ux500_charger *charger, | |
575 | int ich_out) | |
576 | { | |
577 | int ret; | |
578 | int curr_index; | |
579 | struct pm2xxx_charger *pm2; | |
580 | u8 val; | |
581 | ||
582 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
583 | pm2 = to_pm2xxx_charger_ac_device_info(charger); | |
584 | else | |
585 | return -ENXIO; | |
586 | ||
587 | curr_index = pm2xxx_current_to_regval(ich_out); | |
588 | if (curr_index < 0) { | |
589 | dev_err(pm2->dev, | |
006f82d6 | 590 | "Charger current too high, charging not started\n"); |
01ec8c54 MJ |
591 | return -ENXIO; |
592 | } | |
593 | ||
594 | ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val); | |
595 | if (ret >= 0) { | |
596 | val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK; | |
597 | val |= curr_index; | |
598 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val); | |
599 | if (ret < 0) { | |
600 | dev_err(pm2->dev, | |
601 | "%s write failed\n", __func__); | |
602 | } | |
603 | } | |
604 | else | |
605 | dev_err(pm2->dev, "%s read failed\n", __func__); | |
606 | ||
607 | return ret; | |
608 | } | |
609 | ||
610 | static int pm2xxx_charger_ac_get_property(struct power_supply *psy, | |
611 | enum power_supply_property psp, | |
612 | union power_supply_propval *val) | |
613 | { | |
614 | struct pm2xxx_charger *pm2; | |
615 | ||
616 | pm2 = to_pm2xxx_charger_ac_device_info(psy_to_ux500_charger(psy)); | |
617 | ||
618 | switch (psp) { | |
619 | case POWER_SUPPLY_PROP_HEALTH: | |
620 | if (pm2->flags.mainextchnotok) | |
621 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
622 | else if (pm2->ac.wd_expired) | |
623 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
624 | else if (pm2->flags.main_thermal_prot) | |
625 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
789ca7b4 RK |
626 | else if (pm2->flags.ovv) |
627 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
01ec8c54 MJ |
628 | else |
629 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
630 | break; | |
631 | case POWER_SUPPLY_PROP_ONLINE: | |
632 | val->intval = pm2->ac.charger_online; | |
633 | break; | |
634 | case POWER_SUPPLY_PROP_PRESENT: | |
635 | val->intval = pm2->ac.charger_connected; | |
636 | break; | |
01ec8c54 MJ |
637 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
638 | pm2->ac.cv_active = pm2xxx_charger_get_ac_cv(pm2); | |
639 | val->intval = pm2->ac.cv_active; | |
640 | break; | |
01ec8c54 MJ |
641 | default: |
642 | return -EINVAL; | |
643 | } | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static int pm2xxx_charging_init(struct pm2xxx_charger *pm2) | |
648 | { | |
649 | int ret = 0; | |
650 | ||
651 | /* enable CC and CV watchdog */ | |
652 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG3, | |
653 | (PM2XXX_CH_WD_CV_PHASE_60MIN | PM2XXX_CH_WD_CC_PHASE_60MIN)); | |
654 | if( ret < 0) | |
655 | return ret; | |
656 | ||
657 | /* enable precharge watchdog */ | |
658 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG4, | |
659 | PM2XXX_CH_WD_PRECH_PHASE_60MIN); | |
660 | ||
006f82d6 OC |
661 | /* Disable auto timeout */ |
662 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG5, | |
663 | PM2XXX_CH_WD_AUTO_TIMEOUT_20MIN); | |
664 | ||
665 | /* | |
666 | * EOC current level = 100mA | |
667 | * Precharge current level = 100mA | |
668 | * CC current level = 1000mA | |
669 | */ | |
670 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, | |
671 | (PM2XXX_DIR_CH_CC_CURRENT_1000MA | | |
672 | PM2XXX_CH_PRECH_CURRENT_100MA | | |
673 | PM2XXX_CH_EOC_CURRENT_100MA)); | |
674 | ||
675 | /* | |
676 | * recharge threshold = 3.8V | |
677 | * Precharge to CC threshold = 2.9V | |
678 | */ | |
679 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG7, | |
680 | (PM2XXX_CH_PRECH_VOL_2_9 | PM2XXX_CH_VRESUME_VOL_3_8)); | |
681 | ||
682 | /* float voltage charger level = 4.2V */ | |
683 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, | |
684 | PM2XXX_CH_VOLT_4_2); | |
685 | ||
686 | /* Voltage drop between VBAT and VSYS in HW charging = 300mV */ | |
687 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG9, | |
688 | (PM2XXX_CH_150MV_DROP_300MV | PM2XXX_CHARCHING_INFO_DIS | | |
689 | PM2XXX_CH_CC_REDUCED_CURRENT_IDENT | | |
690 | PM2XXX_CH_CC_MODEDROP_DIS)); | |
691 | ||
692 | /* Input charger level of over voltage = 10V */ | |
693 | ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR2, | |
694 | PM2XXX_VPWR2_OVV_10); | |
695 | ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR1, | |
696 | PM2XXX_VPWR1_OVV_10); | |
697 | ||
698 | /* Input charger drop */ | |
699 | ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR2, | |
700 | (PM2XXX_VPWR2_HW_OPT_DIS | PM2XXX_VPWR2_VALID_DIS | | |
701 | PM2XXX_VPWR2_DROP_DIS)); | |
702 | ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR1, | |
703 | (PM2XXX_VPWR1_HW_OPT_DIS | PM2XXX_VPWR1_VALID_DIS | | |
704 | PM2XXX_VPWR1_DROP_DIS)); | |
705 | ||
706 | /* Disable battery low monitoring */ | |
707 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_LOW_LEV_COMP_REG, | |
e41f39ea | 708 | PM2XXX_VBAT_LOW_MONITORING_ENA); |
006f82d6 OC |
709 | |
710 | /* Disable LED */ | |
711 | ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, | |
712 | PM2XXX_LED_SELECT_DIS); | |
713 | ||
01ec8c54 MJ |
714 | return ret; |
715 | } | |
716 | ||
717 | static int pm2xxx_charger_ac_en(struct ux500_charger *charger, | |
718 | int enable, int vset, int iset) | |
719 | { | |
720 | int ret; | |
721 | int volt_index; | |
722 | int curr_index; | |
723 | u8 val; | |
724 | ||
725 | struct pm2xxx_charger *pm2 = to_pm2xxx_charger_ac_device_info(charger); | |
726 | ||
727 | if (enable) { | |
728 | if (!pm2->ac.charger_connected) { | |
729 | dev_dbg(pm2->dev, "AC charger not connected\n"); | |
730 | return -ENXIO; | |
731 | } | |
732 | ||
733 | dev_dbg(pm2->dev, "Enable AC: %dmV %dmA\n", vset, iset); | |
734 | if (!pm2->vddadc_en_ac) { | |
735 | regulator_enable(pm2->regu); | |
736 | pm2->vddadc_en_ac = true; | |
737 | } | |
738 | ||
739 | ret = pm2xxx_charging_init(pm2); | |
740 | if (ret < 0) { | |
741 | dev_err(pm2->dev, "%s charging init failed\n", | |
742 | __func__); | |
743 | goto error_occured; | |
744 | } | |
745 | ||
746 | volt_index = pm2xxx_voltage_to_regval(vset); | |
747 | curr_index = pm2xxx_current_to_regval(iset); | |
748 | ||
749 | if (volt_index < 0 || curr_index < 0) { | |
750 | dev_err(pm2->dev, | |
751 | "Charger voltage or current too high, " | |
752 | "charging not started\n"); | |
753 | return -ENXIO; | |
754 | } | |
755 | ||
756 | ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG8, &val); | |
e41f39ea RK |
757 | if (ret < 0) { |
758 | dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); | |
759 | goto error_occured; | |
760 | } | |
761 | val &= ~PM2XXX_CH_VOLT_MASK; | |
762 | val |= volt_index; | |
763 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, val); | |
764 | if (ret < 0) { | |
765 | dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); | |
766 | goto error_occured; | |
01ec8c54 MJ |
767 | } |
768 | ||
769 | ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val); | |
e41f39ea RK |
770 | if (ret < 0) { |
771 | dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__); | |
772 | goto error_occured; | |
773 | } | |
774 | val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK; | |
775 | val |= curr_index; | |
776 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val); | |
777 | if (ret < 0) { | |
778 | dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__); | |
779 | goto error_occured; | |
01ec8c54 MJ |
780 | } |
781 | ||
782 | if (!pm2->bat->enable_overshoot) { | |
783 | ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val); | |
e41f39ea RK |
784 | if (ret < 0) { |
785 | dev_err(pm2->dev, "%s pm2xxx read failed\n", | |
786 | __func__); | |
787 | goto error_occured; | |
788 | } | |
789 | val |= PM2XXX_ANTI_OVERSHOOT_EN; | |
790 | ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, val); | |
791 | if (ret < 0) { | |
792 | dev_err(pm2->dev, "%s pm2xxx write failed\n", | |
793 | __func__); | |
794 | goto error_occured; | |
01ec8c54 | 795 | } |
01ec8c54 MJ |
796 | } |
797 | ||
798 | ret = pm2xxx_charging_enable_mngt(pm2); | |
e41f39ea RK |
799 | if (ret < 0) { |
800 | dev_err(pm2->dev, "Failed to enable" | |
801 | "pm2xxx ac charger\n"); | |
01ec8c54 MJ |
802 | goto error_occured; |
803 | } | |
804 | ||
805 | pm2->ac.charger_online = 1; | |
806 | } else { | |
807 | pm2->ac.charger_online = 0; | |
808 | pm2->ac.wd_expired = false; | |
809 | ||
810 | /* Disable regulator if enabled */ | |
811 | if (pm2->vddadc_en_ac) { | |
812 | regulator_disable(pm2->regu); | |
813 | pm2->vddadc_en_ac = false; | |
814 | } | |
815 | ||
816 | ret = pm2xxx_charging_disable_mngt(pm2); | |
e41f39ea RK |
817 | if (ret < 0) { |
818 | dev_err(pm2->dev, "failed to disable" | |
819 | "pm2xxx ac charger\n"); | |
820 | goto error_occured; | |
01ec8c54 MJ |
821 | } |
822 | ||
823 | dev_dbg(pm2->dev, "PM2301: " "Disabled AC charging\n"); | |
824 | } | |
825 | power_supply_changed(&pm2->ac_chg.psy); | |
826 | ||
827 | error_occured: | |
828 | return ret; | |
829 | } | |
830 | ||
831 | static int pm2xxx_charger_watchdog_kick(struct ux500_charger *charger) | |
832 | { | |
833 | int ret; | |
834 | struct pm2xxx_charger *pm2; | |
835 | ||
836 | if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS) | |
837 | pm2 = to_pm2xxx_charger_ac_device_info(charger); | |
838 | else | |
839 | return -ENXIO; | |
840 | ||
841 | ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_WD_KICK, WD_TIMER); | |
842 | if (ret) | |
843 | dev_err(pm2->dev, "Failed to kick WD!\n"); | |
844 | ||
845 | return ret; | |
846 | } | |
847 | ||
848 | static void pm2xxx_charger_ac_work(struct work_struct *work) | |
849 | { | |
850 | struct pm2xxx_charger *pm2 = container_of(work, | |
851 | struct pm2xxx_charger, ac_work); | |
852 | ||
853 | ||
854 | power_supply_changed(&pm2->ac_chg.psy); | |
855 | sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present"); | |
856 | }; | |
857 | ||
789ca7b4 RK |
858 | static void pm2xxx_charger_check_hw_failure_work(struct work_struct *work) |
859 | { | |
860 | u8 reg_value; | |
861 | ||
862 | struct pm2xxx_charger *pm2 = container_of(work, | |
863 | struct pm2xxx_charger, check_hw_failure_work.work); | |
864 | ||
865 | if (pm2->flags.ovv) { | |
866 | pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, ®_value); | |
867 | ||
868 | if (!(reg_value & (PM2XXX_INT4_S_ITVPWR1OVV | | |
869 | PM2XXX_INT4_S_ITVPWR2OVV))) { | |
870 | pm2->flags.ovv = false; | |
871 | power_supply_changed(&pm2->ac_chg.psy); | |
872 | } | |
873 | } | |
874 | ||
875 | /* If we still have a failure, schedule a new check */ | |
876 | if (pm2->flags.ovv) { | |
877 | queue_delayed_work(pm2->charger_wq, | |
878 | &pm2->check_hw_failure_work, round_jiffies(HZ)); | |
879 | } | |
880 | } | |
881 | ||
01ec8c54 MJ |
882 | static void pm2xxx_charger_check_main_thermal_prot_work( |
883 | struct work_struct *work) | |
884 | { | |
885 | }; | |
886 | ||
006f82d6 OC |
887 | static struct pm2xxx_interrupts pm2xxx_int = { |
888 | .handler[0] = pm2_int_reg0, | |
889 | .handler[1] = pm2_int_reg1, | |
890 | .handler[2] = pm2_int_reg2, | |
891 | .handler[3] = pm2_int_reg3, | |
892 | .handler[4] = pm2_int_reg4, | |
893 | .handler[5] = pm2_int_reg5, | |
894 | }; | |
895 | ||
01ec8c54 MJ |
896 | static struct pm2xxx_irq pm2xxx_charger_irq[] = { |
897 | {"PM2XXX_IRQ_INT", pm2xxx_irq_int}, | |
898 | }; | |
899 | ||
900 | static int pm2xxx_wall_charger_resume(struct i2c_client *i2c_client) | |
901 | { | |
902 | return 0; | |
903 | } | |
904 | ||
905 | static int pm2xxx_wall_charger_suspend(struct i2c_client *i2c_client, | |
906 | pm_message_t state) | |
907 | { | |
908 | return 0; | |
909 | } | |
910 | ||
116c326e | 911 | static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client, |
01ec8c54 MJ |
912 | const struct i2c_device_id *id) |
913 | { | |
914 | struct pm2xxx_platform_data *pl_data = i2c_client->dev.platform_data; | |
915 | struct pm2xxx_charger *pm2; | |
916 | int ret = 0; | |
917 | u8 val; | |
918 | ||
919 | pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL); | |
920 | if (!pm2) { | |
921 | dev_err(pm2->dev, "pm2xxx_charger allocation failed\n"); | |
922 | return -ENOMEM; | |
923 | } | |
924 | ||
925 | /* get parent data */ | |
926 | pm2->dev = &i2c_client->dev; | |
927 | pm2->gpadc = ab8500_gpadc_get("ab8500-gpadc.0"); | |
928 | ||
006f82d6 OC |
929 | pm2->pm2_int = &pm2xxx_int; |
930 | ||
01ec8c54 MJ |
931 | /* get charger spcific platform data */ |
932 | if (!pl_data->wall_charger) { | |
933 | dev_err(pm2->dev, "no charger platform data supplied\n"); | |
934 | ret = -EINVAL; | |
935 | goto free_device_info; | |
936 | } | |
937 | ||
938 | pm2->pdata = pl_data->wall_charger; | |
939 | ||
940 | /* get battery specific platform data */ | |
941 | if (!pl_data->battery) { | |
942 | dev_err(pm2->dev, "no battery platform data supplied\n"); | |
943 | ret = -EINVAL; | |
944 | goto free_device_info; | |
945 | } | |
946 | ||
947 | pm2->bat = pl_data->battery; | |
948 | ||
3988043b LJ |
949 | /*get lpn GPIO from platform data*/ |
950 | if (!pm2->pdata->lpn_gpio) { | |
951 | dev_err(pm2->dev, "no lpn gpio data supplied\n"); | |
952 | ret = -EINVAL; | |
953 | goto free_device_info; | |
954 | } | |
955 | pm2->lpn_pin = pm2->pdata->lpn_gpio; | |
956 | ||
01ec8c54 MJ |
957 | if (!i2c_check_functionality(i2c_client->adapter, |
958 | I2C_FUNC_SMBUS_BYTE_DATA | | |
959 | I2C_FUNC_SMBUS_READ_WORD_DATA)) { | |
960 | ret = -ENODEV; | |
961 | dev_info(pm2->dev, "pm2301 i2c_check_functionality failed\n"); | |
962 | goto free_device_info; | |
963 | } | |
964 | ||
965 | pm2->config.pm2xxx_i2c = i2c_client; | |
966 | pm2->config.pm2xxx_id = (struct i2c_device_id *) id; | |
967 | i2c_set_clientdata(i2c_client, pm2); | |
968 | ||
969 | /* AC supply */ | |
970 | /* power_supply base class */ | |
971 | pm2->ac_chg.psy.name = pm2->pdata->label; | |
972 | pm2->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS; | |
973 | pm2->ac_chg.psy.properties = pm2xxx_charger_ac_props; | |
974 | pm2->ac_chg.psy.num_properties = ARRAY_SIZE(pm2xxx_charger_ac_props); | |
975 | pm2->ac_chg.psy.get_property = pm2xxx_charger_ac_get_property; | |
976 | pm2->ac_chg.psy.supplied_to = pm2->pdata->supplied_to; | |
977 | pm2->ac_chg.psy.num_supplicants = pm2->pdata->num_supplicants; | |
978 | /* pm2xxx_charger sub-class */ | |
979 | pm2->ac_chg.ops.enable = &pm2xxx_charger_ac_en; | |
980 | pm2->ac_chg.ops.kick_wd = &pm2xxx_charger_watchdog_kick; | |
981 | pm2->ac_chg.ops.update_curr = &pm2xxx_charger_update_charger_current; | |
982 | pm2->ac_chg.max_out_volt = pm2xxx_charger_voltage_map[ | |
983 | ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1]; | |
984 | pm2->ac_chg.max_out_curr = pm2xxx_charger_current_map[ | |
985 | ARRAY_SIZE(pm2xxx_charger_current_map) - 1]; | |
e07a5645 | 986 | pm2->ac_chg.wdt_refresh = WD_KICK_INTERVAL; |
006f82d6 | 987 | pm2->ac_chg.enabled = true; |
e07a5645 | 988 | pm2->ac_chg.external = true; |
01ec8c54 MJ |
989 | |
990 | /* Create a work queue for the charger */ | |
991 | pm2->charger_wq = | |
992 | create_singlethread_workqueue("pm2xxx_charger_wq"); | |
993 | if (pm2->charger_wq == NULL) { | |
994 | dev_err(pm2->dev, "failed to create work queue\n"); | |
995 | goto free_device_info; | |
996 | } | |
997 | ||
998 | /* Init work for charger detection */ | |
999 | INIT_WORK(&pm2->ac_work, pm2xxx_charger_ac_work); | |
1000 | ||
1001 | /* Init work for checking HW status */ | |
1002 | INIT_WORK(&pm2->check_main_thermal_prot_work, | |
1003 | pm2xxx_charger_check_main_thermal_prot_work); | |
1004 | ||
789ca7b4 RK |
1005 | /* Init work for HW failure check */ |
1006 | INIT_DEFERRABLE_WORK(&pm2->check_hw_failure_work, | |
1007 | pm2xxx_charger_check_hw_failure_work); | |
1008 | ||
01ec8c54 MJ |
1009 | /* |
1010 | * VDD ADC supply needs to be enabled from this driver when there | |
1011 | * is a charger connected to avoid erroneous BTEMP_HIGH/LOW | |
1012 | * interrupts during charging | |
1013 | */ | |
1014 | pm2->regu = regulator_get(pm2->dev, "vddadc"); | |
1015 | if (IS_ERR(pm2->regu)) { | |
1016 | ret = PTR_ERR(pm2->regu); | |
1017 | dev_err(pm2->dev, "failed to get vddadc regulator\n"); | |
1018 | goto free_charger_wq; | |
1019 | } | |
1020 | ||
1021 | /* Register AC charger class */ | |
1022 | ret = power_supply_register(pm2->dev, &pm2->ac_chg.psy); | |
1023 | if (ret) { | |
1024 | dev_err(pm2->dev, "failed to register AC charger\n"); | |
1025 | goto free_regulator; | |
1026 | } | |
1027 | ||
1028 | /* Register interrupts */ | |
1029 | ret = request_threaded_irq(pm2->pdata->irq_number, NULL, | |
1030 | pm2xxx_charger_irq[0].isr, | |
1031 | pm2->pdata->irq_type, | |
1032 | pm2xxx_charger_irq[0].name, pm2); | |
1033 | ||
1034 | if (ret != 0) { | |
1035 | dev_err(pm2->dev, "failed to request %s IRQ %d: %d\n", | |
1036 | pm2xxx_charger_irq[0].name, pm2->pdata->irq_number, ret); | |
1037 | goto unregister_pm2xxx_charger; | |
1038 | } | |
1039 | ||
3988043b LJ |
1040 | /*Initialize lock*/ |
1041 | mutex_init(&pm2->lock); | |
1042 | ||
01ec8c54 | 1043 | /* |
3988043b LJ |
1044 | * Charger detection mechanism requires pulling up the LPN pin |
1045 | * while i2c communication if Charger is not connected | |
1046 | * LPN pin of PM2301 is GPIO60 of AB9540 | |
01ec8c54 | 1047 | */ |
3988043b LJ |
1048 | ret = gpio_request(pm2->lpn_pin, "pm2301_lpm_gpio"); |
1049 | if (ret < 0) { | |
1050 | dev_err(pm2->dev, "pm2301_lpm_gpio request failed\n"); | |
1051 | goto unregister_pm2xxx_charger; | |
1052 | } | |
1053 | ret = gpio_direction_output(pm2->lpn_pin, 0); | |
1054 | if (ret < 0) { | |
1055 | dev_err(pm2->dev, "pm2301_lpm_gpio direction failed\n"); | |
1056 | goto free_gpio; | |
1057 | } | |
1058 | ||
01ec8c54 MJ |
1059 | ret = pm2xxx_charger_detection(pm2, &val); |
1060 | ||
1061 | if ((ret == 0) && val) { | |
8891716e LJ |
1062 | /* |
1063 | * When boot is due to AC charger plug-in, | |
1064 | * read interrupt registers | |
1065 | */ | |
1066 | pm2xxx_reg_read(pm2, PM2XXX_REG_INT1, &val); | |
1067 | pm2xxx_reg_read(pm2, PM2XXX_REG_INT2, &val); | |
1068 | pm2xxx_reg_read(pm2, PM2XXX_REG_INT4, &val); | |
01ec8c54 | 1069 | pm2->ac.charger_connected = 1; |
54fbbb62 PF |
1070 | ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON, |
1071 | AB8500_MAIN_CH_DET); | |
01ec8c54 MJ |
1072 | pm2->ac_conn = true; |
1073 | power_supply_changed(&pm2->ac_chg.psy); | |
1074 | sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present"); | |
1075 | } | |
1076 | ||
1077 | return 0; | |
1078 | ||
3988043b LJ |
1079 | free_gpio: |
1080 | gpio_free(pm2->lpn_pin); | |
01ec8c54 MJ |
1081 | unregister_pm2xxx_charger: |
1082 | /* unregister power supply */ | |
1083 | power_supply_unregister(&pm2->ac_chg.psy); | |
1084 | free_regulator: | |
1085 | /* disable the regulator */ | |
1086 | regulator_put(pm2->regu); | |
1087 | free_charger_wq: | |
1088 | destroy_workqueue(pm2->charger_wq); | |
1089 | free_device_info: | |
1090 | kfree(pm2); | |
1091 | return ret; | |
1092 | } | |
1093 | ||
116c326e | 1094 | static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client) |
01ec8c54 MJ |
1095 | { |
1096 | struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client); | |
1097 | ||
1098 | /* Disable AC charging */ | |
1099 | pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0); | |
1100 | ||
1101 | /* Disable interrupts */ | |
1102 | free_irq(pm2->pdata->irq_number, pm2); | |
1103 | ||
1104 | /* Delete the work queue */ | |
1105 | destroy_workqueue(pm2->charger_wq); | |
1106 | ||
1107 | flush_scheduled_work(); | |
1108 | ||
1109 | /* disable the regulator */ | |
1110 | regulator_put(pm2->regu); | |
1111 | ||
1112 | power_supply_unregister(&pm2->ac_chg.psy); | |
1113 | ||
3988043b LJ |
1114 | /*Free GPIO60*/ |
1115 | gpio_free(pm2->lpn_pin); | |
1116 | ||
01ec8c54 MJ |
1117 | kfree(pm2); |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static const struct i2c_device_id pm2xxx_id[] = { | |
1123 | { "pm2301", 0 }, | |
1124 | { } | |
1125 | }; | |
1126 | ||
1127 | MODULE_DEVICE_TABLE(i2c, pm2xxx_id); | |
1128 | ||
1129 | static struct i2c_driver pm2xxx_charger_driver = { | |
1130 | .probe = pm2xxx_wall_charger_probe, | |
116c326e | 1131 | .remove = pm2xxx_wall_charger_remove, |
01ec8c54 MJ |
1132 | .suspend = pm2xxx_wall_charger_suspend, |
1133 | .resume = pm2xxx_wall_charger_resume, | |
1134 | .driver = { | |
1135 | .name = "pm2xxx-wall_charger", | |
1136 | .owner = THIS_MODULE, | |
1137 | }, | |
1138 | .id_table = pm2xxx_id, | |
1139 | }; | |
1140 | ||
1141 | static int __init pm2xxx_charger_init(void) | |
1142 | { | |
1143 | return i2c_add_driver(&pm2xxx_charger_driver); | |
1144 | } | |
1145 | ||
1146 | static void __exit pm2xxx_charger_exit(void) | |
1147 | { | |
1148 | i2c_del_driver(&pm2xxx_charger_driver); | |
1149 | } | |
1150 | ||
1151 | subsys_initcall_sync(pm2xxx_charger_init); | |
1152 | module_exit(pm2xxx_charger_exit); | |
1153 | ||
1154 | MODULE_LICENSE("GPL v2"); | |
1155 | MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay"); | |
1156 | MODULE_ALIAS("platform:pm2xxx-charger"); | |
1157 | MODULE_DESCRIPTION("PM2xxx charger management driver"); |