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Linux 5.1.15
[linux/fpc-iii.git] / drivers / mfd / ab8500-core.c
blob11ab17f64c6491953341c8055d7d23a2a8689c3a
1 /*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * License Terms: GNU General Public License v2
5 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
6 * Author: Rabin Vincent <rabin.vincent@stericsson.com>
7 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/slab.h>
12 #include <linux/init.h>
13 #include <linux/irq.h>
14 #include <linux/irqdomain.h>
15 #include <linux/delay.h>
16 #include <linux/interrupt.h>
17 #include <linux/moduleparam.h>
18 #include <linux/platform_device.h>
19 #include <linux/mfd/core.h>
20 #include <linux/mfd/abx500.h>
21 #include <linux/mfd/abx500/ab8500.h>
22 #include <linux/mfd/abx500/ab8500-bm.h>
23 #include <linux/mfd/dbx500-prcmu.h>
24 #include <linux/regulator/ab8500.h>
25 #include <linux/of.h>
26 #include <linux/of_device.h>
27
28 /*
29 * Interrupt register offsets
30 * Bank : 0x0E
31 */
32 #define AB8500_IT_SOURCE1_REG 0x00
33 #define AB8500_IT_SOURCE2_REG 0x01
34 #define AB8500_IT_SOURCE3_REG 0x02
35 #define AB8500_IT_SOURCE4_REG 0x03
36 #define AB8500_IT_SOURCE5_REG 0x04
37 #define AB8500_IT_SOURCE6_REG 0x05
38 #define AB8500_IT_SOURCE7_REG 0x06
39 #define AB8500_IT_SOURCE8_REG 0x07
40 #define AB9540_IT_SOURCE13_REG 0x0C
41 #define AB8500_IT_SOURCE19_REG 0x12
42 #define AB8500_IT_SOURCE20_REG 0x13
43 #define AB8500_IT_SOURCE21_REG 0x14
44 #define AB8500_IT_SOURCE22_REG 0x15
45 #define AB8500_IT_SOURCE23_REG 0x16
46 #define AB8500_IT_SOURCE24_REG 0x17
47
48 /*
49 * latch registers
50 */
51 #define AB8500_IT_LATCH1_REG 0x20
52 #define AB8500_IT_LATCH2_REG 0x21
53 #define AB8500_IT_LATCH3_REG 0x22
54 #define AB8500_IT_LATCH4_REG 0x23
55 #define AB8500_IT_LATCH5_REG 0x24
56 #define AB8500_IT_LATCH6_REG 0x25
57 #define AB8500_IT_LATCH7_REG 0x26
58 #define AB8500_IT_LATCH8_REG 0x27
59 #define AB8500_IT_LATCH9_REG 0x28
60 #define AB8500_IT_LATCH10_REG 0x29
61 #define AB8500_IT_LATCH12_REG 0x2B
62 #define AB9540_IT_LATCH13_REG 0x2C
63 #define AB8500_IT_LATCH19_REG 0x32
64 #define AB8500_IT_LATCH20_REG 0x33
65 #define AB8500_IT_LATCH21_REG 0x34
66 #define AB8500_IT_LATCH22_REG 0x35
67 #define AB8500_IT_LATCH23_REG 0x36
68 #define AB8500_IT_LATCH24_REG 0x37
69
70 /*
71 * mask registers
72 */
73
74 #define AB8500_IT_MASK1_REG 0x40
75 #define AB8500_IT_MASK2_REG 0x41
76 #define AB8500_IT_MASK3_REG 0x42
77 #define AB8500_IT_MASK4_REG 0x43
78 #define AB8500_IT_MASK5_REG 0x44
79 #define AB8500_IT_MASK6_REG 0x45
80 #define AB8500_IT_MASK7_REG 0x46
81 #define AB8500_IT_MASK8_REG 0x47
82 #define AB8500_IT_MASK9_REG 0x48
83 #define AB8500_IT_MASK10_REG 0x49
84 #define AB8500_IT_MASK11_REG 0x4A
85 #define AB8500_IT_MASK12_REG 0x4B
86 #define AB8500_IT_MASK13_REG 0x4C
87 #define AB8500_IT_MASK14_REG 0x4D
88 #define AB8500_IT_MASK15_REG 0x4E
89 #define AB8500_IT_MASK16_REG 0x4F
90 #define AB8500_IT_MASK17_REG 0x50
91 #define AB8500_IT_MASK18_REG 0x51
92 #define AB8500_IT_MASK19_REG 0x52
93 #define AB8500_IT_MASK20_REG 0x53
94 #define AB8500_IT_MASK21_REG 0x54
95 #define AB8500_IT_MASK22_REG 0x55
96 #define AB8500_IT_MASK23_REG 0x56
97 #define AB8500_IT_MASK24_REG 0x57
98 #define AB8500_IT_MASK25_REG 0x58
99
100 /*
101 * latch hierarchy registers
102 */
103 #define AB8500_IT_LATCHHIER1_REG 0x60
104 #define AB8500_IT_LATCHHIER2_REG 0x61
105 #define AB8500_IT_LATCHHIER3_REG 0x62
106 #define AB8540_IT_LATCHHIER4_REG 0x63
107
108 #define AB8500_IT_LATCHHIER_NUM 3
109 #define AB8540_IT_LATCHHIER_NUM 4
110
111 #define AB8500_REV_REG 0x80
112 #define AB8500_IC_NAME_REG 0x82
113 #define AB8500_SWITCH_OFF_STATUS 0x00
114
115 #define AB8500_TURN_ON_STATUS 0x00
116 #define AB8505_TURN_ON_STATUS_2 0x04
117
118 #define AB8500_CH_USBCH_STAT1_REG 0x02
119 #define VBUS_DET_DBNC100 0x02
120 #define VBUS_DET_DBNC1 0x01
121
122 static DEFINE_SPINLOCK(on_stat_lock);
123 static u8 turn_on_stat_mask = 0xFF;
124 static u8 turn_on_stat_set;
125 static bool no_bm; /* No battery management */
126 /*
127 * not really modular, but the easiest way to keep compat with existing
128 * bootargs behaviour is to continue using module_param here.
129 */
130 module_param(no_bm, bool, S_IRUGO);
131
132 #define AB9540_MODEM_CTRL2_REG 0x23
133 #define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2)
134
135 /*
136 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
137 * numbers are indexed into this array with (num / 8). The interupts are
138 * defined in linux/mfd/ab8500.h
139 *
140 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
141 * offset 0.
142 */
143 /* AB8500 support */
144 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
145 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
146 };
147
148 /* AB9540 / AB8505 support */
149 static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
150 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
151 };
152
153 /* AB8540 support */
154 static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
155 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
156 23, 25, 26, 27, 28, 29, 30, 31,
157 };
158
159 static const char ab8500_version_str[][7] = {
160 [AB8500_VERSION_AB8500] = "AB8500",
161 [AB8500_VERSION_AB8505] = "AB8505",
162 [AB8500_VERSION_AB9540] = "AB9540",
163 [AB8500_VERSION_AB8540] = "AB8540",
164 };
165
166 static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
167 {
168 int ret;
169
170 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
171 if (ret < 0)
172 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
173 return ret;
174 }
175
176 static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
177 u8 data)
178 {
179 int ret;
180
181 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
182 &mask, 1);
183 if (ret < 0)
184 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
185 return ret;
186 }
187
188 static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
189 {
190 int ret;
191 u8 data;
192
193 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
194 if (ret < 0) {
195 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
196 return ret;
197 }
198 return (int)data;
199 }
200
201 static int ab8500_get_chip_id(struct device *dev)
202 {
203 struct ab8500 *ab8500;
204
205 if (!dev)
206 return -EINVAL;
207 ab8500 = dev_get_drvdata(dev->parent);
208 return ab8500 ? (int)ab8500->chip_id : -EINVAL;
209 }
210
211 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
212 u8 reg, u8 data)
213 {
214 int ret;
215 /*
216 * Put the u8 bank and u8 register together into a an u16.
217 * The bank on higher 8 bits and register in lower 8 bits.
218 */
219 u16 addr = ((u16)bank) << 8 | reg;
220
221 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
222
223 mutex_lock(&ab8500->lock);
224
225 ret = ab8500->write(ab8500, addr, data);
226 if (ret < 0)
227 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
228 addr, ret);
229 mutex_unlock(&ab8500->lock);
230
231 return ret;
232 }
233
234 static int ab8500_set_register(struct device *dev, u8 bank,
235 u8 reg, u8 value)
236 {
237 int ret;
238 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
239
240 atomic_inc(&ab8500->transfer_ongoing);
241 ret = set_register_interruptible(ab8500, bank, reg, value);
242 atomic_dec(&ab8500->transfer_ongoing);
243 return ret;
244 }
245
246 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
247 u8 reg, u8 *value)
248 {
249 int ret;
250 u16 addr = ((u16)bank) << 8 | reg;
251
252 mutex_lock(&ab8500->lock);
253
254 ret = ab8500->read(ab8500, addr);
255 if (ret < 0)
256 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
257 addr, ret);
258 else
259 *value = ret;
260
261 mutex_unlock(&ab8500->lock);
262 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
263
264 return (ret < 0) ? ret : 0;
265 }
266
267 static int ab8500_get_register(struct device *dev, u8 bank,
268 u8 reg, u8 *value)
269 {
270 int ret;
271 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
272
273 atomic_inc(&ab8500->transfer_ongoing);
274 ret = get_register_interruptible(ab8500, bank, reg, value);
275 atomic_dec(&ab8500->transfer_ongoing);
276 return ret;
277 }
278
279 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
280 u8 reg, u8 bitmask, u8 bitvalues)
281 {
282 int ret;
283 u16 addr = ((u16)bank) << 8 | reg;
284
285 mutex_lock(&ab8500->lock);
286
287 if (ab8500->write_masked == NULL) {
288 u8 data;
289
290 ret = ab8500->read(ab8500, addr);
291 if (ret < 0) {
292 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
293 addr, ret);
294 goto out;
295 }
296
297 data = (u8)ret;
298 data = (~bitmask & data) | (bitmask & bitvalues);
299
300 ret = ab8500->write(ab8500, addr, data);
301 if (ret < 0)
302 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
303 addr, ret);
304
305 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
306 data);
307 goto out;
308 }
309 ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
310 if (ret < 0)
311 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
312 ret);
313 out:
314 mutex_unlock(&ab8500->lock);
315 return ret;
316 }
317
318 static int ab8500_mask_and_set_register(struct device *dev,
319 u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
320 {
321 int ret;
322 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
323
324 atomic_inc(&ab8500->transfer_ongoing);
325 ret = mask_and_set_register_interruptible(ab8500, bank, reg,
326 bitmask, bitvalues);
327 atomic_dec(&ab8500->transfer_ongoing);
328 return ret;
329 }
330
331 static struct abx500_ops ab8500_ops = {
332 .get_chip_id = ab8500_get_chip_id,
333 .get_register = ab8500_get_register,
334 .set_register = ab8500_set_register,
335 .get_register_page = NULL,
336 .set_register_page = NULL,
337 .mask_and_set_register = ab8500_mask_and_set_register,
338 .event_registers_startup_state_get = NULL,
339 .startup_irq_enabled = NULL,
340 .dump_all_banks = ab8500_dump_all_banks,
341 };
342
343 static void ab8500_irq_lock(struct irq_data *data)
344 {
345 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
346
347 mutex_lock(&ab8500->irq_lock);
348 atomic_inc(&ab8500->transfer_ongoing);
349 }
350
351 static void ab8500_irq_sync_unlock(struct irq_data *data)
352 {
353 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
354 int i;
355
356 for (i = 0; i < ab8500->mask_size; i++) {
357 u8 old = ab8500->oldmask[i];
358 u8 new = ab8500->mask[i];
359 int reg;
360
361 if (new == old)
362 continue;
363
364 /*
365 * Interrupt register 12 doesn't exist prior to AB8500 version
366 * 2.0
367 */
368 if (ab8500->irq_reg_offset[i] == 11 &&
369 is_ab8500_1p1_or_earlier(ab8500))
370 continue;
371
372 if (ab8500->irq_reg_offset[i] < 0)
373 continue;
374
375 ab8500->oldmask[i] = new;
376
377 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
378 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
379 }
380 atomic_dec(&ab8500->transfer_ongoing);
381 mutex_unlock(&ab8500->irq_lock);
382 }
383
384 static void ab8500_irq_mask(struct irq_data *data)
385 {
386 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
387 int offset = data->hwirq;
388 int index = offset / 8;
389 int mask = 1 << (offset % 8);
390
391 ab8500->mask[index] |= mask;
392
393 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
394 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
395 ab8500->mask[index + 2] |= mask;
396 if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
397 ab8500->mask[index + 1] |= mask;
398 if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
399 /* Here the falling IRQ is one bit lower */
400 ab8500->mask[index] |= (mask << 1);
401 }
402
403 static void ab8500_irq_unmask(struct irq_data *data)
404 {
405 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
406 unsigned int type = irqd_get_trigger_type(data);
407 int offset = data->hwirq;
408 int index = offset / 8;
409 int mask = 1 << (offset % 8);
410
411 if (type & IRQ_TYPE_EDGE_RISING)
412 ab8500->mask[index] &= ~mask;
413
414 /* The AB8500 GPIOs have two interrupts each (rising & falling). */
415 if (type & IRQ_TYPE_EDGE_FALLING) {
416 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
417 ab8500->mask[index + 2] &= ~mask;
418 else if (offset >= AB9540_INT_GPIO50R &&
419 offset <= AB9540_INT_GPIO54R)
420 ab8500->mask[index + 1] &= ~mask;
421 else if (offset == AB8540_INT_GPIO43R ||
422 offset == AB8540_INT_GPIO44R)
423 /* Here the falling IRQ is one bit lower */
424 ab8500->mask[index] &= ~(mask << 1);
425 else
426 ab8500->mask[index] &= ~mask;
427 } else {
428 /* Satisfies the case where type is not set. */
429 ab8500->mask[index] &= ~mask;
430 }
431 }
432
433 static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
434 {
435 return 0;
436 }
437
438 static struct irq_chip ab8500_irq_chip = {
439 .name = "ab8500",
440 .irq_bus_lock = ab8500_irq_lock,
441 .irq_bus_sync_unlock = ab8500_irq_sync_unlock,
442 .irq_mask = ab8500_irq_mask,
443 .irq_disable = ab8500_irq_mask,
444 .irq_unmask = ab8500_irq_unmask,
445 .irq_set_type = ab8500_irq_set_type,
446 };
447
448 static void update_latch_offset(u8 *offset, int i)
449 {
450 /* Fix inconsistent ITFromLatch25 bit mapping... */
451 if (unlikely(*offset == 17))
452 *offset = 24;
453 /* Fix inconsistent ab8540 bit mapping... */
454 if (unlikely(*offset == 16))
455 *offset = 25;
456 if ((i == 3) && (*offset >= 24))
457 *offset += 2;
458 }
459
460 static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
461 int latch_offset, u8 latch_val)
462 {
463 int int_bit, line, i;
464
465 for (i = 0; i < ab8500->mask_size; i++)
466 if (ab8500->irq_reg_offset[i] == latch_offset)
467 break;
468
469 if (i >= ab8500->mask_size) {
470 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
471 latch_offset);
472 return -ENXIO;
473 }
474
475 /* ignore masked out interrupts */
476 latch_val &= ~ab8500->mask[i];
477
478 while (latch_val) {
479 int_bit = __ffs(latch_val);
480 line = (i << 3) + int_bit;
481 latch_val &= ~(1 << int_bit);
482
483 /*
484 * This handles the falling edge hwirqs from the GPIO
485 * lines. Route them back to the line registered for the
486 * rising IRQ, as this is merely a flag for the same IRQ
487 * in linux terms.
488 */
489 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
490 line -= 16;
491 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
492 line -= 8;
493 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
494 line += 1;
495
496 handle_nested_irq(irq_create_mapping(ab8500->domain, line));
497 }
498
499 return 0;
500 }
501
502 static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
503 int hier_offset, u8 hier_val)
504 {
505 int latch_bit, status;
506 u8 latch_offset, latch_val;
507
508 do {
509 latch_bit = __ffs(hier_val);
510 latch_offset = (hier_offset << 3) + latch_bit;
511
512 update_latch_offset(&latch_offset, hier_offset);
513
514 status = get_register_interruptible(ab8500,
515 AB8500_INTERRUPT,
516 AB8500_IT_LATCH1_REG + latch_offset,
517 &latch_val);
518 if (status < 0 || latch_val == 0)
519 goto discard;
520
521 status = ab8500_handle_hierarchical_line(ab8500,
522 latch_offset, latch_val);
523 if (status < 0)
524 return status;
525 discard:
526 hier_val &= ~(1 << latch_bit);
527 } while (hier_val);
528
529 return 0;
530 }
531
532 static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
533 {
534 struct ab8500 *ab8500 = dev;
535 u8 i;
536
537 dev_vdbg(ab8500->dev, "interrupt\n");
538
539 /* Hierarchical interrupt version */
540 for (i = 0; i < (ab8500->it_latchhier_num); i++) {
541 int status;
542 u8 hier_val;
543
544 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
545 AB8500_IT_LATCHHIER1_REG + i, &hier_val);
546 if (status < 0 || hier_val == 0)
547 continue;
548
549 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
550 if (status < 0)
551 break;
552 }
553 return IRQ_HANDLED;
554 }
555
556 static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
557 irq_hw_number_t hwirq)
558 {
559 struct ab8500 *ab8500 = d->host_data;
560
561 if (!ab8500)
562 return -EINVAL;
563
564 irq_set_chip_data(virq, ab8500);
565 irq_set_chip_and_handler(virq, &ab8500_irq_chip,
566 handle_simple_irq);
567 irq_set_nested_thread(virq, 1);
568 irq_set_noprobe(virq);
569
570 return 0;
571 }
572
573 static const struct irq_domain_ops ab8500_irq_ops = {
574 .map = ab8500_irq_map,
575 .xlate = irq_domain_xlate_twocell,
576 };
577
578 static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
579 {
580 int num_irqs;
581
582 if (is_ab8540(ab8500))
583 num_irqs = AB8540_NR_IRQS;
584 else if (is_ab9540(ab8500))
585 num_irqs = AB9540_NR_IRQS;
586 else if (is_ab8505(ab8500))
587 num_irqs = AB8505_NR_IRQS;
588 else
589 num_irqs = AB8500_NR_IRQS;
590
591 /* If ->irq_base is zero this will give a linear mapping */
592 ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
593 num_irqs, 0,
594 &ab8500_irq_ops, ab8500);
595
596 if (!ab8500->domain) {
597 dev_err(ab8500->dev, "Failed to create irqdomain\n");
598 return -ENODEV;
599 }
600
601 return 0;
602 }
603
604 int ab8500_suspend(struct ab8500 *ab8500)
605 {
606 if (atomic_read(&ab8500->transfer_ongoing))
607 return -EINVAL;
608
609 return 0;
610 }
611
612 static const struct mfd_cell ab8500_bm_devs[] = {
613 {
614 .name = "ab8500-charger",
615 .of_compatible = "stericsson,ab8500-charger",
616 .platform_data = &ab8500_bm_data,
617 .pdata_size = sizeof(ab8500_bm_data),
618 },
619 {
620 .name = "ab8500-btemp",
621 .of_compatible = "stericsson,ab8500-btemp",
622 .platform_data = &ab8500_bm_data,
623 .pdata_size = sizeof(ab8500_bm_data),
624 },
625 {
626 .name = "ab8500-fg",
627 .of_compatible = "stericsson,ab8500-fg",
628 .platform_data = &ab8500_bm_data,
629 .pdata_size = sizeof(ab8500_bm_data),
630 },
631 {
632 .name = "ab8500-chargalg",
633 .of_compatible = "stericsson,ab8500-chargalg",
634 .platform_data = &ab8500_bm_data,
635 .pdata_size = sizeof(ab8500_bm_data),
636 },
637 };
638
639 static const struct mfd_cell ab8500_devs[] = {
640 #ifdef CONFIG_DEBUG_FS
641 {
642 .name = "ab8500-debug",
643 .of_compatible = "stericsson,ab8500-debug",
644 },
645 #endif
646 {
647 .name = "ab8500-sysctrl",
648 .of_compatible = "stericsson,ab8500-sysctrl",
649 },
650 {
651 .name = "ab8500-ext-regulator",
652 .of_compatible = "stericsson,ab8500-ext-regulator",
653 },
654 {
655 .name = "ab8500-regulator",
656 .of_compatible = "stericsson,ab8500-regulator",
657 },
658 {
659 .name = "ab8500-clk",
660 .of_compatible = "stericsson,ab8500-clk",
661 },
662 {
663 .name = "ab8500-gpadc",
664 .of_compatible = "stericsson,ab8500-gpadc",
665 },
666 {
667 .name = "ab8500-rtc",
668 .of_compatible = "stericsson,ab8500-rtc",
669 },
670 {
671 .name = "ab8500-acc-det",
672 .of_compatible = "stericsson,ab8500-acc-det",
673 },
674 {
675
676 .name = "ab8500-poweron-key",
677 .of_compatible = "stericsson,ab8500-poweron-key",
678 },
679 {
680 .name = "ab8500-pwm",
681 .of_compatible = "stericsson,ab8500-pwm",
682 .id = 1,
683 },
684 {
685 .name = "ab8500-pwm",
686 .of_compatible = "stericsson,ab8500-pwm",
687 .id = 2,
688 },
689 {
690 .name = "ab8500-pwm",
691 .of_compatible = "stericsson,ab8500-pwm",
692 .id = 3,
693 },
694 {
695 .name = "ab8500-denc",
696 .of_compatible = "stericsson,ab8500-denc",
697 },
698 {
699 .name = "pinctrl-ab8500",
700 .of_compatible = "stericsson,ab8500-gpio",
701 },
702 {
703 .name = "abx500-temp",
704 .of_compatible = "stericsson,abx500-temp",
705 },
706 {
707 .name = "ab8500-usb",
708 .of_compatible = "stericsson,ab8500-usb",
709 },
710 {
711 .name = "ab8500-codec",
712 .of_compatible = "stericsson,ab8500-codec",
713 },
714 };
715
716 static const struct mfd_cell ab9540_devs[] = {
717 #ifdef CONFIG_DEBUG_FS
718 {
719 .name = "ab8500-debug",
720 },
721 #endif
722 {
723 .name = "ab8500-sysctrl",
724 },
725 {
726 .name = "ab8500-ext-regulator",
727 },
728 {
729 .name = "ab8500-regulator",
730 },
731 {
732 .name = "abx500-clk",
733 .of_compatible = "stericsson,abx500-clk",
734 },
735 {
736 .name = "ab8500-gpadc",
737 .of_compatible = "stericsson,ab8500-gpadc",
738 },
739 {
740 .name = "ab8500-rtc",
741 },
742 {
743 .name = "ab8500-acc-det",
744 },
745 {
746 .name = "ab8500-poweron-key",
747 },
748 {
749 .name = "ab8500-pwm",
750 .id = 1,
751 },
752 {
753 .name = "abx500-temp",
754 },
755 {
756 .name = "pinctrl-ab9540",
757 .of_compatible = "stericsson,ab9540-gpio",
758 },
759 {
760 .name = "ab9540-usb",
761 },
762 {
763 .name = "ab9540-codec",
764 },
765 {
766 .name = "ab-iddet",
767 },
768 };
769
770 /* Device list for ab8505 */
771 static const struct mfd_cell ab8505_devs[] = {
772 #ifdef CONFIG_DEBUG_FS
773 {
774 .name = "ab8500-debug",
775 },
776 #endif
777 {
778 .name = "ab8500-sysctrl",
779 },
780 {
781 .name = "ab8500-regulator",
782 },
783 {
784 .name = "abx500-clk",
785 .of_compatible = "stericsson,abx500-clk",
786 },
787 {
788 .name = "ab8500-gpadc",
789 .of_compatible = "stericsson,ab8500-gpadc",
790 },
791 {
792 .name = "ab8500-rtc",
793 },
794 {
795 .name = "ab8500-acc-det",
796 },
797 {
798 .name = "ab8500-poweron-key",
799 },
800 {
801 .name = "ab8500-pwm",
802 .id = 1,
803 },
804 {
805 .name = "pinctrl-ab8505",
806 },
807 {
808 .name = "ab8500-usb",
809 },
810 {
811 .name = "ab8500-codec",
812 },
813 {
814 .name = "ab-iddet",
815 },
816 };
817
818 static const struct mfd_cell ab8540_devs[] = {
819 #ifdef CONFIG_DEBUG_FS
820 {
821 .name = "ab8500-debug",
822 },
823 #endif
824 {
825 .name = "ab8500-sysctrl",
826 },
827 {
828 .name = "ab8500-ext-regulator",
829 },
830 {
831 .name = "ab8500-regulator",
832 },
833 {
834 .name = "abx500-clk",
835 .of_compatible = "stericsson,abx500-clk",
836 },
837 {
838 .name = "ab8500-gpadc",
839 .of_compatible = "stericsson,ab8500-gpadc",
840 },
841 {
842 .name = "ab8500-acc-det",
843 },
844 {
845 .name = "ab8500-poweron-key",
846 },
847 {
848 .name = "ab8500-pwm",
849 .id = 1,
850 },
851 {
852 .name = "abx500-temp",
853 },
854 {
855 .name = "pinctrl-ab8540",
856 },
857 {
858 .name = "ab8540-usb",
859 },
860 {
861 .name = "ab8540-codec",
862 },
863 {
864 .name = "ab-iddet",
865 },
866 };
867
868 static const struct mfd_cell ab8540_cut1_devs[] = {
869 {
870 .name = "ab8500-rtc",
871 .of_compatible = "stericsson,ab8500-rtc",
872 },
873 };
874
875 static const struct mfd_cell ab8540_cut2_devs[] = {
876 {
877 .name = "ab8540-rtc",
878 .of_compatible = "stericsson,ab8540-rtc",
879 },
880 };
881
882 static ssize_t show_chip_id(struct device *dev,
883 struct device_attribute *attr, char *buf)
884 {
885 struct ab8500 *ab8500;
886
887 ab8500 = dev_get_drvdata(dev);
888
889 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
890 }
891
892 /*
893 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
894 * 0x01 Swoff bit programming
895 * 0x02 Thermal protection activation
896 * 0x04 Vbat lower then BattOk falling threshold
897 * 0x08 Watchdog expired
898 * 0x10 Non presence of 32kHz clock
899 * 0x20 Battery level lower than power on reset threshold
900 * 0x40 Power on key 1 pressed longer than 10 seconds
901 * 0x80 DB8500 thermal shutdown
902 */
903 static ssize_t show_switch_off_status(struct device *dev,
904 struct device_attribute *attr, char *buf)
905 {
906 int ret;
907 u8 value;
908 struct ab8500 *ab8500;
909
910 ab8500 = dev_get_drvdata(dev);
911 ret = get_register_interruptible(ab8500, AB8500_RTC,
912 AB8500_SWITCH_OFF_STATUS, &value);
913 if (ret < 0)
914 return ret;
915 return sprintf(buf, "%#x\n", value);
916 }
917
918 /* use mask and set to override the register turn_on_stat value */
919 void ab8500_override_turn_on_stat(u8 mask, u8 set)
920 {
921 spin_lock(&on_stat_lock);
922 turn_on_stat_mask = mask;
923 turn_on_stat_set = set;
924 spin_unlock(&on_stat_lock);
925 }
926
927 /*
928 * ab8500 has turned on due to (TURN_ON_STATUS):
929 * 0x01 PORnVbat
930 * 0x02 PonKey1dbF
931 * 0x04 PonKey2dbF
932 * 0x08 RTCAlarm
933 * 0x10 MainChDet
934 * 0x20 VbusDet
935 * 0x40 UsbIDDetect
936 * 0x80 Reserved
937 */
938 static ssize_t show_turn_on_status(struct device *dev,
939 struct device_attribute *attr, char *buf)
940 {
941 int ret;
942 u8 value;
943 struct ab8500 *ab8500;
944
945 ab8500 = dev_get_drvdata(dev);
946 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
947 AB8500_TURN_ON_STATUS, &value);
948 if (ret < 0)
949 return ret;
950
951 /*
952 * In L9540, turn_on_status register is not updated correctly if
953 * the device is rebooted with AC/USB charger connected. Due to
954 * this, the device boots android instead of entering into charge
955 * only mode. Read the AC/USB status register to detect the charger
956 * presence and update the turn on status manually.
957 */
958 if (is_ab9540(ab8500)) {
959 spin_lock(&on_stat_lock);
960 value = (value & turn_on_stat_mask) | turn_on_stat_set;
961 spin_unlock(&on_stat_lock);
962 }
963
964 return sprintf(buf, "%#x\n", value);
965 }
966
967 static ssize_t show_turn_on_status_2(struct device *dev,
968 struct device_attribute *attr, char *buf)
969 {
970 int ret;
971 u8 value;
972 struct ab8500 *ab8500;
973
974 ab8500 = dev_get_drvdata(dev);
975 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
976 AB8505_TURN_ON_STATUS_2, &value);
977 if (ret < 0)
978 return ret;
979 return sprintf(buf, "%#x\n", (value & 0x1));
980 }
981
982 static ssize_t show_ab9540_dbbrstn(struct device *dev,
983 struct device_attribute *attr, char *buf)
984 {
985 struct ab8500 *ab8500;
986 int ret;
987 u8 value;
988
989 ab8500 = dev_get_drvdata(dev);
990
991 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
992 AB9540_MODEM_CTRL2_REG, &value);
993 if (ret < 0)
994 return ret;
995
996 return sprintf(buf, "%d\n",
997 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
998 }
999
1000 static ssize_t store_ab9540_dbbrstn(struct device *dev,
1001 struct device_attribute *attr, const char *buf, size_t count)
1002 {
1003 struct ab8500 *ab8500;
1004 int ret = count;
1005 int err;
1006 u8 bitvalues;
1007
1008 ab8500 = dev_get_drvdata(dev);
1009
1010 if (count > 0) {
1011 switch (buf[0]) {
1012 case '0':
1013 bitvalues = 0;
1014 break;
1015 case '1':
1016 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
1017 break;
1018 default:
1019 goto exit;
1020 }
1021
1022 err = mask_and_set_register_interruptible(ab8500,
1023 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
1024 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
1025 if (err)
1026 dev_info(ab8500->dev,
1027 "Failed to set DBBRSTN %c, err %#x\n",
1028 buf[0], err);
1029 }
1030
1031 exit:
1032 return ret;
1033 }
1034
1035 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
1036 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
1037 static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
1038 static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
1039 static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
1040 show_ab9540_dbbrstn, store_ab9540_dbbrstn);
1041
1042 static struct attribute *ab8500_sysfs_entries[] = {
1043 &dev_attr_chip_id.attr,
1044 &dev_attr_switch_off_status.attr,
1045 &dev_attr_turn_on_status.attr,
1046 NULL,
1047 };
1048
1049 static struct attribute *ab8505_sysfs_entries[] = {
1050 &dev_attr_turn_on_status_2.attr,
1051 NULL,
1052 };
1053
1054 static struct attribute *ab9540_sysfs_entries[] = {
1055 &dev_attr_chip_id.attr,
1056 &dev_attr_switch_off_status.attr,
1057 &dev_attr_turn_on_status.attr,
1058 &dev_attr_dbbrstn.attr,
1059 NULL,
1060 };
1061
1062 static const struct attribute_group ab8500_attr_group = {
1063 .attrs = ab8500_sysfs_entries,
1064 };
1065
1066 static const struct attribute_group ab8505_attr_group = {
1067 .attrs = ab8505_sysfs_entries,
1068 };
1069
1070 static const struct attribute_group ab9540_attr_group = {
1071 .attrs = ab9540_sysfs_entries,
1072 };
1073
1074 static int ab8500_probe(struct platform_device *pdev)
1075 {
1076 static const char * const switch_off_status[] = {
1077 "Swoff bit programming",
1078 "Thermal protection activation",
1079 "Vbat lower then BattOk falling threshold",
1080 "Watchdog expired",
1081 "Non presence of 32kHz clock",
1082 "Battery level lower than power on reset threshold",
1083 "Power on key 1 pressed longer than 10 seconds",
1084 "DB8500 thermal shutdown"};
1085 static const char * const turn_on_status[] = {
1086 "Battery rising (Vbat)",
1087 "Power On Key 1 dbF",
1088 "Power On Key 2 dbF",
1089 "RTC Alarm",
1090 "Main Charger Detect",
1091 "Vbus Detect (USB)",
1092 "USB ID Detect",
1093 "UART Factory Mode Detect"};
1094 const struct platform_device_id *platid = platform_get_device_id(pdev);
1095 enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1096 struct device_node *np = pdev->dev.of_node;
1097 struct ab8500 *ab8500;
1098 struct resource *resource;
1099 int ret;
1100 int i;
1101 u8 value;
1102
1103 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1104 if (!ab8500)
1105 return -ENOMEM;
1106
1107 ab8500->dev = &pdev->dev;
1108
1109 resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1110 if (!resource) {
1111 dev_err(&pdev->dev, "no IRQ resource\n");
1112 return -ENODEV;
1113 }
1114
1115 ab8500->irq = resource->start;
1116
1117 ab8500->read = ab8500_prcmu_read;
1118 ab8500->write = ab8500_prcmu_write;
1119 ab8500->write_masked = ab8500_prcmu_write_masked;
1120
1121 mutex_init(&ab8500->lock);
1122 mutex_init(&ab8500->irq_lock);
1123 atomic_set(&ab8500->transfer_ongoing, 0);
1124
1125 platform_set_drvdata(pdev, ab8500);
1126
1127 if (platid)
1128 version = platid->driver_data;
1129
1130 if (version != AB8500_VERSION_UNDEFINED)
1131 ab8500->version = version;
1132 else {
1133 ret = get_register_interruptible(ab8500, AB8500_MISC,
1134 AB8500_IC_NAME_REG, &value);
1135 if (ret < 0) {
1136 dev_err(&pdev->dev, "could not probe HW\n");
1137 return ret;
1138 }
1139
1140 ab8500->version = value;
1141 }
1142
1143 ret = get_register_interruptible(ab8500, AB8500_MISC,
1144 AB8500_REV_REG, &value);
1145 if (ret < 0)
1146 return ret;
1147
1148 ab8500->chip_id = value;
1149
1150 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1151 ab8500_version_str[ab8500->version],
1152 ab8500->chip_id >> 4,
1153 ab8500->chip_id & 0x0F);
1154
1155 /* Configure AB8540 */
1156 if (is_ab8540(ab8500)) {
1157 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1158 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1159 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1160 } /* Configure AB8500 or AB9540 IRQ */
1161 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1162 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1163 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1164 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1165 } else {
1166 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1167 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1168 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1169 }
1170 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1171 GFP_KERNEL);
1172 if (!ab8500->mask)
1173 return -ENOMEM;
1174 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1175 GFP_KERNEL);
1176 if (!ab8500->oldmask)
1177 return -ENOMEM;
1178
1179 /*
1180 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1181 * 0x01 Swoff bit programming
1182 * 0x02 Thermal protection activation
1183 * 0x04 Vbat lower then BattOk falling threshold
1184 * 0x08 Watchdog expired
1185 * 0x10 Non presence of 32kHz clock
1186 * 0x20 Battery level lower than power on reset threshold
1187 * 0x40 Power on key 1 pressed longer than 10 seconds
1188 * 0x80 DB8500 thermal shutdown
1189 */
1190
1191 ret = get_register_interruptible(ab8500, AB8500_RTC,
1192 AB8500_SWITCH_OFF_STATUS, &value);
1193 if (ret < 0)
1194 return ret;
1195 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1196
1197 if (value) {
1198 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1199 if (value & 1)
1200 pr_cont(" \"%s\"", switch_off_status[i]);
1201 value = value >> 1;
1202
1203 }
1204 pr_cont("\n");
1205 } else {
1206 pr_cont(" None\n");
1207 }
1208 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1209 AB8500_TURN_ON_STATUS, &value);
1210 if (ret < 0)
1211 return ret;
1212 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1213
1214 if (value) {
1215 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1216 if (value & 1)
1217 pr_cont("\"%s\" ", turn_on_status[i]);
1218 value = value >> 1;
1219 }
1220 pr_cont("\n");
1221 } else {
1222 pr_cont("None\n");
1223 }
1224
1225 if (is_ab9540(ab8500)) {
1226 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1227 AB8500_CH_USBCH_STAT1_REG, &value);
1228 if (ret < 0)
1229 return ret;
1230 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1231 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1232 AB8500_VBUS_DET);
1233 }
1234
1235 /* Clear and mask all interrupts */
1236 for (i = 0; i < ab8500->mask_size; i++) {
1237 /*
1238 * Interrupt register 12 doesn't exist prior to AB8500 version
1239 * 2.0
1240 */
1241 if (ab8500->irq_reg_offset[i] == 11 &&
1242 is_ab8500_1p1_or_earlier(ab8500))
1243 continue;
1244
1245 if (ab8500->irq_reg_offset[i] < 0)
1246 continue;
1247
1248 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1249 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1250 &value);
1251 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1252 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1253 }
1254
1255 ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1256 if (ret)
1257 return ret;
1258
1259 for (i = 0; i < ab8500->mask_size; i++)
1260 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1261
1262 ret = ab8500_irq_init(ab8500, np);
1263 if (ret)
1264 return ret;
1265
1266 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1267 ab8500_hierarchical_irq,
1268 IRQF_ONESHOT | IRQF_NO_SUSPEND,
1269 "ab8500", ab8500);
1270 if (ret)
1271 return ret;
1272
1273 if (is_ab9540(ab8500))
1274 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1275 ARRAY_SIZE(ab9540_devs), NULL,
1276 0, ab8500->domain);
1277 else if (is_ab8540(ab8500)) {
1278 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1279 ARRAY_SIZE(ab8540_devs), NULL,
1280 0, ab8500->domain);
1281 if (ret)
1282 return ret;
1283
1284 if (is_ab8540_1p2_or_earlier(ab8500))
1285 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1286 ARRAY_SIZE(ab8540_cut1_devs), NULL,
1287 0, ab8500->domain);
1288 else /* ab8540 >= cut2 */
1289 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1290 ARRAY_SIZE(ab8540_cut2_devs), NULL,
1291 0, ab8500->domain);
1292 } else if (is_ab8505(ab8500))
1293 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1294 ARRAY_SIZE(ab8505_devs), NULL,
1295 0, ab8500->domain);
1296 else
1297 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1298 ARRAY_SIZE(ab8500_devs), NULL,
1299 0, ab8500->domain);
1300 if (ret)
1301 return ret;
1302
1303 if (!no_bm) {
1304 /* Add battery management devices */
1305 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1306 ARRAY_SIZE(ab8500_bm_devs), NULL,
1307 0, ab8500->domain);
1308 if (ret)
1309 dev_err(ab8500->dev, "error adding bm devices\n");
1310 }
1311
1312 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1313 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1314 ret = sysfs_create_group(&ab8500->dev->kobj,
1315 &ab9540_attr_group);
1316 else
1317 ret = sysfs_create_group(&ab8500->dev->kobj,
1318 &ab8500_attr_group);
1319
1320 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1321 ab8500->chip_id >= AB8500_CUT2P0)
1322 ret = sysfs_create_group(&ab8500->dev->kobj,
1323 &ab8505_attr_group);
1324
1325 if (ret)
1326 dev_err(ab8500->dev, "error creating sysfs entries\n");
1327
1328 return ret;
1329 }
1330
1331 static const struct platform_device_id ab8500_id[] = {
1332 { "ab8500-core", AB8500_VERSION_AB8500 },
1333 { "ab8505-i2c", AB8500_VERSION_AB8505 },
1334 { "ab9540-i2c", AB8500_VERSION_AB9540 },
1335 { "ab8540-i2c", AB8500_VERSION_AB8540 },
1336 { }
1337 };
1338
1339 static struct platform_driver ab8500_core_driver = {
1340 .driver = {
1341 .name = "ab8500-core",
1342 .suppress_bind_attrs = true,
1343 },
1344 .probe = ab8500_probe,
1345 .id_table = ab8500_id,
1346 };
1347
1348 static int __init ab8500_core_init(void)
1349 {
1350 return platform_driver_register(&ab8500_core_driver);
1351 }
1352 core_initcall(ab8500_core_init);
Linux with added FPC-III support