ramoops: move dump_oops into platform data
[linux-2.6.git] / drivers / mfd / ab8500-core.c
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/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/mfd/core.h>
19 #include <linux/mfd/abx500.h>
20 #include <linux/mfd/ab8500.h>
21 #include <linux/regulator/ab8500.h>
22
23 /*
24  * Interrupt register offsets
25  * Bank : 0x0E
26  */
27 #define AB8500_IT_SOURCE1_REG           0x00
28 #define AB8500_IT_SOURCE2_REG           0x01
29 #define AB8500_IT_SOURCE3_REG           0x02
30 #define AB8500_IT_SOURCE4_REG           0x03
31 #define AB8500_IT_SOURCE5_REG           0x04
32 #define AB8500_IT_SOURCE6_REG           0x05
33 #define AB8500_IT_SOURCE7_REG           0x06
34 #define AB8500_IT_SOURCE8_REG           0x07
35 #define AB8500_IT_SOURCE19_REG          0x12
36 #define AB8500_IT_SOURCE20_REG          0x13
37 #define AB8500_IT_SOURCE21_REG          0x14
38 #define AB8500_IT_SOURCE22_REG          0x15
39 #define AB8500_IT_SOURCE23_REG          0x16
40 #define AB8500_IT_SOURCE24_REG          0x17
41
42 /*
43  * latch registers
44  */
45 #define AB8500_IT_LATCH1_REG            0x20
46 #define AB8500_IT_LATCH2_REG            0x21
47 #define AB8500_IT_LATCH3_REG            0x22
48 #define AB8500_IT_LATCH4_REG            0x23
49 #define AB8500_IT_LATCH5_REG            0x24
50 #define AB8500_IT_LATCH6_REG            0x25
51 #define AB8500_IT_LATCH7_REG            0x26
52 #define AB8500_IT_LATCH8_REG            0x27
53 #define AB8500_IT_LATCH9_REG            0x28
54 #define AB8500_IT_LATCH10_REG           0x29
55 #define AB8500_IT_LATCH12_REG           0x2B
56 #define AB8500_IT_LATCH19_REG           0x32
57 #define AB8500_IT_LATCH20_REG           0x33
58 #define AB8500_IT_LATCH21_REG           0x34
59 #define AB8500_IT_LATCH22_REG           0x35
60 #define AB8500_IT_LATCH23_REG           0x36
61 #define AB8500_IT_LATCH24_REG           0x37
62
63 /*
64  * mask registers
65  */
66
67 #define AB8500_IT_MASK1_REG             0x40
68 #define AB8500_IT_MASK2_REG             0x41
69 #define AB8500_IT_MASK3_REG             0x42
70 #define AB8500_IT_MASK4_REG             0x43
71 #define AB8500_IT_MASK5_REG             0x44
72 #define AB8500_IT_MASK6_REG             0x45
73 #define AB8500_IT_MASK7_REG             0x46
74 #define AB8500_IT_MASK8_REG             0x47
75 #define AB8500_IT_MASK9_REG             0x48
76 #define AB8500_IT_MASK10_REG            0x49
77 #define AB8500_IT_MASK11_REG            0x4A
78 #define AB8500_IT_MASK12_REG            0x4B
79 #define AB8500_IT_MASK13_REG            0x4C
80 #define AB8500_IT_MASK14_REG            0x4D
81 #define AB8500_IT_MASK15_REG            0x4E
82 #define AB8500_IT_MASK16_REG            0x4F
83 #define AB8500_IT_MASK17_REG            0x50
84 #define AB8500_IT_MASK18_REG            0x51
85 #define AB8500_IT_MASK19_REG            0x52
86 #define AB8500_IT_MASK20_REG            0x53
87 #define AB8500_IT_MASK21_REG            0x54
88 #define AB8500_IT_MASK22_REG            0x55
89 #define AB8500_IT_MASK23_REG            0x56
90 #define AB8500_IT_MASK24_REG            0x57
91
92 #define AB8500_REV_REG                  0x80
93 #define AB8500_SWITCH_OFF_STATUS        0x00
94
95 /*
96  * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
97  * numbers are indexed into this array with (num / 8).
98  *
99  * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
100  * offset 0.
101  */
102 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
103         0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
104 };
105
106 static int ab8500_get_chip_id(struct device *dev)
107 {
108         struct ab8500 *ab8500;
109
110         if (!dev)
111                 return -EINVAL;
112         ab8500 = dev_get_drvdata(dev->parent);
113         return ab8500 ? (int)ab8500->chip_id : -EINVAL;
114 }
115
116 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
117         u8 reg, u8 data)
118 {
119         int ret;
120         /*
121          * Put the u8 bank and u8 register together into a an u16.
122          * The bank on higher 8 bits and register in lower 8 bits.
123          * */
124         u16 addr = ((u16)bank) << 8 | reg;
125
126         dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
127
128         ret = mutex_lock_interruptible(&ab8500->lock);
129         if (ret)
130                 return ret;
131
132         ret = ab8500->write(ab8500, addr, data);
133         if (ret < 0)
134                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
135                         addr, ret);
136         mutex_unlock(&ab8500->lock);
137
138         return ret;
139 }
140
141 static int ab8500_set_register(struct device *dev, u8 bank,
142         u8 reg, u8 value)
143 {
144         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
145
146         return set_register_interruptible(ab8500, bank, reg, value);
147 }
148
149 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
150         u8 reg, u8 *value)
151 {
152         int ret;
153         /* put the u8 bank and u8 reg together into a an u16.
154          * bank on higher 8 bits and reg in lower */
155         u16 addr = ((u16)bank) << 8 | reg;
156
157         ret = mutex_lock_interruptible(&ab8500->lock);
158         if (ret)
159                 return ret;
160
161         ret = ab8500->read(ab8500, addr);
162         if (ret < 0)
163                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
164                         addr, ret);
165         else
166                 *value = ret;
167
168         mutex_unlock(&ab8500->lock);
169         dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
170
171         return ret;
172 }
173
174 static int ab8500_get_register(struct device *dev, u8 bank,
175         u8 reg, u8 *value)
176 {
177         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
178
179         return get_register_interruptible(ab8500, bank, reg, value);
180 }
181
182 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
183         u8 reg, u8 bitmask, u8 bitvalues)
184 {
185         int ret;
186         u8 data;
187         /* put the u8 bank and u8 reg together into a an u16.
188          * bank on higher 8 bits and reg in lower */
189         u16 addr = ((u16)bank) << 8 | reg;
190
191         ret = mutex_lock_interruptible(&ab8500->lock);
192         if (ret)
193                 return ret;
194
195         ret = ab8500->read(ab8500, addr);
196         if (ret < 0) {
197                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
198                         addr, ret);
199                 goto out;
200         }
201
202         data = (u8)ret;
203         data = (~bitmask & data) | (bitmask & bitvalues);
204
205         ret = ab8500->write(ab8500, addr, data);
206         if (ret < 0)
207                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
208                         addr, ret);
209
210         dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data);
211 out:
212         mutex_unlock(&ab8500->lock);
213         return ret;
214 }
215
216 static int ab8500_mask_and_set_register(struct device *dev,
217         u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
218 {
219         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
220
221         return mask_and_set_register_interruptible(ab8500, bank, reg,
222                 bitmask, bitvalues);
223
224 }
225
226 static struct abx500_ops ab8500_ops = {
227         .get_chip_id = ab8500_get_chip_id,
228         .get_register = ab8500_get_register,
229         .set_register = ab8500_set_register,
230         .get_register_page = NULL,
231         .set_register_page = NULL,
232         .mask_and_set_register = ab8500_mask_and_set_register,
233         .event_registers_startup_state_get = NULL,
234         .startup_irq_enabled = NULL,
235 };
236
237 static void ab8500_irq_lock(struct irq_data *data)
238 {
239         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
240
241         mutex_lock(&ab8500->irq_lock);
242 }
243
244 static void ab8500_irq_sync_unlock(struct irq_data *data)
245 {
246         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
247         int i;
248
249         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
250                 u8 old = ab8500->oldmask[i];
251                 u8 new = ab8500->mask[i];
252                 int reg;
253
254                 if (new == old)
255                         continue;
256
257                 /* Interrupt register 12 doesn't exist prior to version 2.0 */
258                 if (ab8500_irq_regoffset[i] == 11 &&
259                         ab8500->chip_id < AB8500_CUT2P0)
260                         continue;
261
262                 ab8500->oldmask[i] = new;
263
264                 reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];
265                 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
266         }
267
268         mutex_unlock(&ab8500->irq_lock);
269 }
270
271 static void ab8500_irq_mask(struct irq_data *data)
272 {
273         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
274         int offset = data->irq - ab8500->irq_base;
275         int index = offset / 8;
276         int mask = 1 << (offset % 8);
277
278         ab8500->mask[index] |= mask;
279 }
280
281 static void ab8500_irq_unmask(struct irq_data *data)
282 {
283         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
284         int offset = data->irq - ab8500->irq_base;
285         int index = offset / 8;
286         int mask = 1 << (offset % 8);
287
288         ab8500->mask[index] &= ~mask;
289 }
290
291 static struct irq_chip ab8500_irq_chip = {
292         .name                   = "ab8500",
293         .irq_bus_lock           = ab8500_irq_lock,
294         .irq_bus_sync_unlock    = ab8500_irq_sync_unlock,
295         .irq_mask               = ab8500_irq_mask,
296         .irq_unmask             = ab8500_irq_unmask,
297 };
298
299 static irqreturn_t ab8500_irq(int irq, void *dev)
300 {
301         struct ab8500 *ab8500 = dev;
302         int i;
303
304         dev_vdbg(ab8500->dev, "interrupt\n");
305
306         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
307                 int regoffset = ab8500_irq_regoffset[i];
308                 int status;
309                 u8 value;
310
311                 /* Interrupt register 12 doesn't exist prior to version 2.0 */
312                 if (regoffset == 11 && ab8500->chip_id < AB8500_CUT2P0)
313                         continue;
314
315                 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
316                         AB8500_IT_LATCH1_REG + regoffset, &value);
317                 if (status < 0 || value == 0)
318                         continue;
319
320                 do {
321                         int bit = __ffs(value);
322                         int line = i * 8 + bit;
323
324                         handle_nested_irq(ab8500->irq_base + line);
325                         value &= ~(1 << bit);
326                 } while (value);
327         }
328
329         return IRQ_HANDLED;
330 }
331
332 static int ab8500_irq_init(struct ab8500 *ab8500)
333 {
334         int base = ab8500->irq_base;
335         int irq;
336
337         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
338                 irq_set_chip_data(irq, ab8500);
339                 irq_set_chip_and_handler(irq, &ab8500_irq_chip,
340                                          handle_simple_irq);
341                 irq_set_nested_thread(irq, 1);
342 #ifdef CONFIG_ARM
343                 set_irq_flags(irq, IRQF_VALID);
344 #else
345                 irq_set_noprobe(irq);
346 #endif
347         }
348
349         return 0;
350 }
351
352 static void ab8500_irq_remove(struct ab8500 *ab8500)
353 {
354         int base = ab8500->irq_base;
355         int irq;
356
357         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
358 #ifdef CONFIG_ARM
359                 set_irq_flags(irq, 0);
360 #endif
361                 irq_set_chip_and_handler(irq, NULL, NULL);
362                 irq_set_chip_data(irq, NULL);
363         }
364 }
365
366 static struct resource ab8500_gpio_resources[] = {
367         {
368                 .name   = "GPIO_INT6",
369                 .start  = AB8500_INT_GPIO6R,
370                 .end    = AB8500_INT_GPIO41F,
371                 .flags  = IORESOURCE_IRQ,
372         }
373 };
374
375 static struct resource ab8500_gpadc_resources[] = {
376         {
377                 .name   = "HW_CONV_END",
378                 .start  = AB8500_INT_GP_HW_ADC_CONV_END,
379                 .end    = AB8500_INT_GP_HW_ADC_CONV_END,
380                 .flags  = IORESOURCE_IRQ,
381         },
382         {
383                 .name   = "SW_CONV_END",
384                 .start  = AB8500_INT_GP_SW_ADC_CONV_END,
385                 .end    = AB8500_INT_GP_SW_ADC_CONV_END,
386                 .flags  = IORESOURCE_IRQ,
387         },
388 };
389
390 static struct resource ab8500_rtc_resources[] = {
391         {
392                 .name   = "60S",
393                 .start  = AB8500_INT_RTC_60S,
394                 .end    = AB8500_INT_RTC_60S,
395                 .flags  = IORESOURCE_IRQ,
396         },
397         {
398                 .name   = "ALARM",
399                 .start  = AB8500_INT_RTC_ALARM,
400                 .end    = AB8500_INT_RTC_ALARM,
401                 .flags  = IORESOURCE_IRQ,
402         },
403 };
404
405 static struct resource ab8500_poweronkey_db_resources[] = {
406         {
407                 .name   = "ONKEY_DBF",
408                 .start  = AB8500_INT_PON_KEY1DB_F,
409                 .end    = AB8500_INT_PON_KEY1DB_F,
410                 .flags  = IORESOURCE_IRQ,
411         },
412         {
413                 .name   = "ONKEY_DBR",
414                 .start  = AB8500_INT_PON_KEY1DB_R,
415                 .end    = AB8500_INT_PON_KEY1DB_R,
416                 .flags  = IORESOURCE_IRQ,
417         },
418 };
419
420 static struct resource ab8500_bm_resources[] = {
421         {
422                 .name = "MAIN_EXT_CH_NOT_OK",
423                 .start = AB8500_INT_MAIN_EXT_CH_NOT_OK,
424                 .end = AB8500_INT_MAIN_EXT_CH_NOT_OK,
425                 .flags = IORESOURCE_IRQ,
426         },
427         {
428                 .name = "BATT_OVV",
429                 .start = AB8500_INT_BATT_OVV,
430                 .end = AB8500_INT_BATT_OVV,
431                 .flags = IORESOURCE_IRQ,
432         },
433         {
434                 .name = "MAIN_CH_UNPLUG_DET",
435                 .start = AB8500_INT_MAIN_CH_UNPLUG_DET,
436                 .end = AB8500_INT_MAIN_CH_UNPLUG_DET,
437                 .flags = IORESOURCE_IRQ,
438         },
439         {
440                 .name = "MAIN_CHARGE_PLUG_DET",
441                 .start = AB8500_INT_MAIN_CH_PLUG_DET,
442                 .end = AB8500_INT_MAIN_CH_PLUG_DET,
443                 .flags = IORESOURCE_IRQ,
444         },
445         {
446                 .name = "VBUS_DET_F",
447                 .start = AB8500_INT_VBUS_DET_F,
448                 .end = AB8500_INT_VBUS_DET_F,
449                 .flags = IORESOURCE_IRQ,
450         },
451         {
452                 .name = "VBUS_DET_R",
453                 .start = AB8500_INT_VBUS_DET_R,
454                 .end = AB8500_INT_VBUS_DET_R,
455                 .flags = IORESOURCE_IRQ,
456         },
457         {
458                 .name = "BAT_CTRL_INDB",
459                 .start = AB8500_INT_BAT_CTRL_INDB,
460                 .end = AB8500_INT_BAT_CTRL_INDB,
461                 .flags = IORESOURCE_IRQ,
462         },
463         {
464                 .name = "CH_WD_EXP",
465                 .start = AB8500_INT_CH_WD_EXP,
466                 .end = AB8500_INT_CH_WD_EXP,
467                 .flags = IORESOURCE_IRQ,
468         },
469         {
470                 .name = "VBUS_OVV",
471                 .start = AB8500_INT_VBUS_OVV,
472                 .end = AB8500_INT_VBUS_OVV,
473                 .flags = IORESOURCE_IRQ,
474         },
475         {
476                 .name = "NCONV_ACCU",
477                 .start = AB8500_INT_CCN_CONV_ACC,
478                 .end = AB8500_INT_CCN_CONV_ACC,
479                 .flags = IORESOURCE_IRQ,
480         },
481         {
482                 .name = "LOW_BAT_F",
483                 .start = AB8500_INT_LOW_BAT_F,
484                 .end = AB8500_INT_LOW_BAT_F,
485                 .flags = IORESOURCE_IRQ,
486         },
487         {
488                 .name = "LOW_BAT_R",
489                 .start = AB8500_INT_LOW_BAT_R,
490                 .end = AB8500_INT_LOW_BAT_R,
491                 .flags = IORESOURCE_IRQ,
492         },
493         {
494                 .name = "BTEMP_LOW",
495                 .start = AB8500_INT_BTEMP_LOW,
496                 .end = AB8500_INT_BTEMP_LOW,
497                 .flags = IORESOURCE_IRQ,
498         },
499         {
500                 .name = "BTEMP_HIGH",
501                 .start = AB8500_INT_BTEMP_HIGH,
502                 .end = AB8500_INT_BTEMP_HIGH,
503                 .flags = IORESOURCE_IRQ,
504         },
505         {
506                 .name = "USB_CHARGER_NOT_OKR",
507                 .start = AB8500_INT_USB_CHARGER_NOT_OK,
508                 .end = AB8500_INT_USB_CHARGER_NOT_OK,
509                 .flags = IORESOURCE_IRQ,
510         },
511         {
512                 .name = "USB_CHARGE_DET_DONE",
513                 .start = AB8500_INT_USB_CHG_DET_DONE,
514                 .end = AB8500_INT_USB_CHG_DET_DONE,
515                 .flags = IORESOURCE_IRQ,
516         },
517         {
518                 .name = "USB_CH_TH_PROT_R",
519                 .start = AB8500_INT_USB_CH_TH_PROT_R,
520                 .end = AB8500_INT_USB_CH_TH_PROT_R,
521                 .flags = IORESOURCE_IRQ,
522         },
523         {
524                 .name = "MAIN_CH_TH_PROT_R",
525                 .start = AB8500_INT_MAIN_CH_TH_PROT_R,
526                 .end = AB8500_INT_MAIN_CH_TH_PROT_R,
527                 .flags = IORESOURCE_IRQ,
528         },
529         {
530                 .name = "USB_CHARGER_NOT_OKF",
531                 .start = AB8500_INT_USB_CHARGER_NOT_OKF,
532                 .end = AB8500_INT_USB_CHARGER_NOT_OKF,
533                 .flags = IORESOURCE_IRQ,
534         },
535 };
536
537 static struct resource ab8500_debug_resources[] = {
538         {
539                 .name   = "IRQ_FIRST",
540                 .start  = AB8500_INT_MAIN_EXT_CH_NOT_OK,
541                 .end    = AB8500_INT_MAIN_EXT_CH_NOT_OK,
542                 .flags  = IORESOURCE_IRQ,
543         },
544         {
545                 .name   = "IRQ_LAST",
546                 .start  = AB8500_INT_USB_CHARGER_NOT_OKF,
547                 .end    = AB8500_INT_USB_CHARGER_NOT_OKF,
548                 .flags  = IORESOURCE_IRQ,
549         },
550 };
551
552 static struct resource ab8500_usb_resources[] = {
553         {
554                 .name = "ID_WAKEUP_R",
555                 .start = AB8500_INT_ID_WAKEUP_R,
556                 .end = AB8500_INT_ID_WAKEUP_R,
557                 .flags = IORESOURCE_IRQ,
558         },
559         {
560                 .name = "ID_WAKEUP_F",
561                 .start = AB8500_INT_ID_WAKEUP_F,
562                 .end = AB8500_INT_ID_WAKEUP_F,
563                 .flags = IORESOURCE_IRQ,
564         },
565         {
566                 .name = "VBUS_DET_F",
567                 .start = AB8500_INT_VBUS_DET_F,
568                 .end = AB8500_INT_VBUS_DET_F,
569                 .flags = IORESOURCE_IRQ,
570         },
571         {
572                 .name = "VBUS_DET_R",
573                 .start = AB8500_INT_VBUS_DET_R,
574                 .end = AB8500_INT_VBUS_DET_R,
575                 .flags = IORESOURCE_IRQ,
576         },
577         {
578                 .name = "USB_LINK_STATUS",
579                 .start = AB8500_INT_USB_LINK_STATUS,
580                 .end = AB8500_INT_USB_LINK_STATUS,
581                 .flags = IORESOURCE_IRQ,
582         },
583 };
584
585 static struct resource ab8500_temp_resources[] = {
586         {
587                 .name  = "AB8500_TEMP_WARM",
588                 .start = AB8500_INT_TEMP_WARM,
589                 .end   = AB8500_INT_TEMP_WARM,
590                 .flags = IORESOURCE_IRQ,
591         },
592 };
593
594 static struct mfd_cell ab8500_devs[] = {
595 #ifdef CONFIG_DEBUG_FS
596         {
597                 .name = "ab8500-debug",
598                 .num_resources = ARRAY_SIZE(ab8500_debug_resources),
599                 .resources = ab8500_debug_resources,
600         },
601 #endif
602         {
603                 .name = "ab8500-sysctrl",
604         },
605         {
606                 .name = "ab8500-regulator",
607         },
608         {
609                 .name = "ab8500-gpio",
610                 .num_resources = ARRAY_SIZE(ab8500_gpio_resources),
611                 .resources = ab8500_gpio_resources,
612         },
613         {
614                 .name = "ab8500-gpadc",
615                 .num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
616                 .resources = ab8500_gpadc_resources,
617         },
618         {
619                 .name = "ab8500-rtc",
620                 .num_resources = ARRAY_SIZE(ab8500_rtc_resources),
621                 .resources = ab8500_rtc_resources,
622         },
623         {
624                 .name = "ab8500-bm",
625                 .num_resources = ARRAY_SIZE(ab8500_bm_resources),
626                 .resources = ab8500_bm_resources,
627         },
628         { .name = "ab8500-codec", },
629         {
630                 .name = "ab8500-usb",
631                 .num_resources = ARRAY_SIZE(ab8500_usb_resources),
632                 .resources = ab8500_usb_resources,
633         },
634         {
635                 .name = "ab8500-poweron-key",
636                 .num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
637                 .resources = ab8500_poweronkey_db_resources,
638         },
639         {
640                 .name = "ab8500-pwm",
641                 .id = 1,
642         },
643         {
644                 .name = "ab8500-pwm",
645                 .id = 2,
646         },
647         {
648                 .name = "ab8500-pwm",
649                 .id = 3,
650         },
651         { .name = "ab8500-leds", },
652         {
653                 .name = "ab8500-denc",
654         },
655         {
656                 .name = "ab8500-temp",
657                 .num_resources = ARRAY_SIZE(ab8500_temp_resources),
658                 .resources = ab8500_temp_resources,
659         },
660 };
661
662 static ssize_t show_chip_id(struct device *dev,
663                                 struct device_attribute *attr, char *buf)
664 {
665         struct ab8500 *ab8500;
666
667         ab8500 = dev_get_drvdata(dev);
668         return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
669 }
670
671 /*
672  * ab8500 has switched off due to (SWITCH_OFF_STATUS):
673  * 0x01 Swoff bit programming
674  * 0x02 Thermal protection activation
675  * 0x04 Vbat lower then BattOk falling threshold
676  * 0x08 Watchdog expired
677  * 0x10 Non presence of 32kHz clock
678  * 0x20 Battery level lower than power on reset threshold
679  * 0x40 Power on key 1 pressed longer than 10 seconds
680  * 0x80 DB8500 thermal shutdown
681  */
682 static ssize_t show_switch_off_status(struct device *dev,
683                                 struct device_attribute *attr, char *buf)
684 {
685         int ret;
686         u8 value;
687         struct ab8500 *ab8500;
688
689         ab8500 = dev_get_drvdata(dev);
690         ret = get_register_interruptible(ab8500, AB8500_RTC,
691                 AB8500_SWITCH_OFF_STATUS, &value);
692         if (ret < 0)
693                 return ret;
694         return sprintf(buf, "%#x\n", value);
695 }
696
697 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
698 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
699
700 static struct attribute *ab8500_sysfs_entries[] = {
701         &dev_attr_chip_id.attr,
702         &dev_attr_switch_off_status.attr,
703         NULL,
704 };
705
706 static struct attribute_group ab8500_attr_group = {
707         .attrs  = ab8500_sysfs_entries,
708 };
709
710 int __devinit ab8500_init(struct ab8500 *ab8500)
711 {
712         struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
713         int ret;
714         int i;
715         u8 value;
716
717         if (plat)
718                 ab8500->irq_base = plat->irq_base;
719
720         mutex_init(&ab8500->lock);
721         mutex_init(&ab8500->irq_lock);
722
723         ret = get_register_interruptible(ab8500, AB8500_MISC,
724                 AB8500_REV_REG, &value);
725         if (ret < 0)
726                 return ret;
727
728         switch (value) {
729         case AB8500_CUTEARLY:
730         case AB8500_CUT1P0:
731         case AB8500_CUT1P1:
732         case AB8500_CUT2P0:
733         case AB8500_CUT3P0:
734                 dev_info(ab8500->dev, "detected chip, revision: %#x\n", value);
735                 break;
736         default:
737                 dev_err(ab8500->dev, "unknown chip, revision: %#x\n", value);
738                 return -EINVAL;
739         }
740         ab8500->chip_id = value;
741
742         /*
743          * ab8500 has switched off due to (SWITCH_OFF_STATUS):
744          * 0x01 Swoff bit programming
745          * 0x02 Thermal protection activation
746          * 0x04 Vbat lower then BattOk falling threshold
747          * 0x08 Watchdog expired
748          * 0x10 Non presence of 32kHz clock
749          * 0x20 Battery level lower than power on reset threshold
750          * 0x40 Power on key 1 pressed longer than 10 seconds
751          * 0x80 DB8500 thermal shutdown
752          */
753
754         ret = get_register_interruptible(ab8500, AB8500_RTC,
755                 AB8500_SWITCH_OFF_STATUS, &value);
756         if (ret < 0)
757                 return ret;
758         dev_info(ab8500->dev, "switch off status: %#x", value);
759
760         if (plat && plat->init)
761                 plat->init(ab8500);
762
763         /* Clear and mask all interrupts */
764         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
765                 /* Interrupt register 12 doesn't exist prior to version 2.0 */
766                 if (ab8500_irq_regoffset[i] == 11 &&
767                         ab8500->chip_id < AB8500_CUT2P0)
768                         continue;
769
770                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
771                         AB8500_IT_LATCH1_REG + ab8500_irq_regoffset[i],
772                         &value);
773                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
774                         AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i], 0xff);
775         }
776
777         ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
778         if (ret)
779                 return ret;
780
781         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++)
782                 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
783
784         if (ab8500->irq_base) {
785                 ret = ab8500_irq_init(ab8500);
786                 if (ret)
787                         return ret;
788
789                 ret = request_threaded_irq(ab8500->irq, NULL, ab8500_irq,
790                                            IRQF_ONESHOT | IRQF_NO_SUSPEND,
791                                            "ab8500", ab8500);
792                 if (ret)
793                         goto out_removeirq;
794         }
795
796         ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
797                               ARRAY_SIZE(ab8500_devs), NULL,
798                               ab8500->irq_base);
799         if (ret)
800                 goto out_freeirq;
801
802         ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group);
803         if (ret)
804                 dev_err(ab8500->dev, "error creating sysfs entries\n");
805
806         return ret;
807
808 out_freeirq:
809         if (ab8500->irq_base) {
810                 free_irq(ab8500->irq, ab8500);
811 out_removeirq:
812                 ab8500_irq_remove(ab8500);
813         }
814         return ret;
815 }
816
817 int __devexit ab8500_exit(struct ab8500 *ab8500)
818 {
819         sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
820         mfd_remove_devices(ab8500->dev);
821         if (ab8500->irq_base) {
822                 free_irq(ab8500->irq, ab8500);
823                 ab8500_irq_remove(ab8500);
824         }
825
826         return 0;
827 }
828
829 MODULE_AUTHOR("Mattias Wallin, Srinidhi Kasagar, Rabin Vincent");
830 MODULE_DESCRIPTION("AB8500 MFD core");
831 MODULE_LICENSE("GPL v2");