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1/*
2 * Core, IRQ and I2C device driver for DA9062 PMIC
3 * Copyright (C) 2015 Dialog Semiconductor Ltd.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/device.h>
20#include <linux/interrupt.h>
21#include <linux/regmap.h>
22#include <linux/irq.h>
23#include <linux/mfd/core.h>
24#include <linux/i2c.h>
25#include <linux/mfd/da9062/core.h>
26#include <linux/mfd/da9062/registers.h>
27#include <linux/regulator/of_regulator.h>
28
29#define DA9062_REG_EVENT_A_OFFSET 0
30#define DA9062_REG_EVENT_B_OFFSET 1
31#define DA9062_REG_EVENT_C_OFFSET 2
32
33static struct regmap_irq da9062_irqs[] = {
34 /* EVENT A */
35 [DA9062_IRQ_ONKEY] = {
36 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
37 .mask = DA9062AA_M_NONKEY_MASK,
38 },
39 [DA9062_IRQ_ALARM] = {
40 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
41 .mask = DA9062AA_M_ALARM_MASK,
42 },
43 [DA9062_IRQ_TICK] = {
44 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
45 .mask = DA9062AA_M_TICK_MASK,
46 },
47 [DA9062_IRQ_WDG_WARN] = {
48 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
49 .mask = DA9062AA_M_WDG_WARN_MASK,
50 },
51 [DA9062_IRQ_SEQ_RDY] = {
52 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
53 .mask = DA9062AA_M_SEQ_RDY_MASK,
54 },
55 /* EVENT B */
56 [DA9062_IRQ_TEMP] = {
57 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
58 .mask = DA9062AA_M_TEMP_MASK,
59 },
60 [DA9062_IRQ_LDO_LIM] = {
61 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
62 .mask = DA9062AA_M_LDO_LIM_MASK,
63 },
64 [DA9062_IRQ_DVC_RDY] = {
65 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
66 .mask = DA9062AA_M_DVC_RDY_MASK,
67 },
68 [DA9062_IRQ_VDD_WARN] = {
69 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
70 .mask = DA9062AA_M_VDD_WARN_MASK,
71 },
72 /* EVENT C */
73 [DA9062_IRQ_GPI0] = {
74 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
75 .mask = DA9062AA_M_GPI0_MASK,
76 },
77 [DA9062_IRQ_GPI1] = {
78 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
79 .mask = DA9062AA_M_GPI1_MASK,
80 },
81 [DA9062_IRQ_GPI2] = {
82 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
83 .mask = DA9062AA_M_GPI2_MASK,
84 },
85 [DA9062_IRQ_GPI3] = {
86 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
87 .mask = DA9062AA_M_GPI3_MASK,
88 },
89 [DA9062_IRQ_GPI4] = {
90 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
91 .mask = DA9062AA_M_GPI4_MASK,
92 },
93};
94
95static struct regmap_irq_chip da9062_irq_chip = {
96 .name = "da9062-irq",
97 .irqs = da9062_irqs,
98 .num_irqs = DA9062_NUM_IRQ,
99 .num_regs = 3,
100 .status_base = DA9062AA_EVENT_A,
101 .mask_base = DA9062AA_IRQ_MASK_A,
102 .ack_base = DA9062AA_EVENT_A,
103};
104
105static struct resource da9062_core_resources[] = {
106 DEFINE_RES_NAMED(DA9062_IRQ_VDD_WARN, 1, "VDD_WARN", IORESOURCE_IRQ),
107};
108
109static struct resource da9062_regulators_resources[] = {
110 DEFINE_RES_NAMED(DA9062_IRQ_LDO_LIM, 1, "LDO_LIM", IORESOURCE_IRQ),
111};
112
113static struct resource da9062_thermal_resources[] = {
114 DEFINE_RES_NAMED(DA9062_IRQ_TEMP, 1, "THERMAL", IORESOURCE_IRQ),
115};
116
117static struct resource da9062_wdt_resources[] = {
118 DEFINE_RES_NAMED(DA9062_IRQ_WDG_WARN, 1, "WD_WARN", IORESOURCE_IRQ),
119};
120
121static struct resource da9062_rtc_resources[] = {
122 DEFINE_RES_NAMED(DA9062_IRQ_ALARM, 1, "ALARM", IORESOURCE_IRQ),
123 DEFINE_RES_NAMED(DA9062_IRQ_TICK, 1, "TICK", IORESOURCE_IRQ),
124};
125
126static struct resource da9062_onkey_resources[] = {
127 DEFINE_RES_NAMED(DA9062_IRQ_ONKEY, 1, "ONKEY", IORESOURCE_IRQ),
128};
129
130static const struct mfd_cell da9062_devs[] = {
131 {
132 .name = "da9062-core",
133 .num_resources = ARRAY_SIZE(da9062_core_resources),
134 .resources = da9062_core_resources,
135 },
136 {
137 .name = "da9062-regulators",
138 .num_resources = ARRAY_SIZE(da9062_regulators_resources),
139 .resources = da9062_regulators_resources,
140 },
141 {
142 .name = "da9062-watchdog",
143 .num_resources = ARRAY_SIZE(da9062_wdt_resources),
144 .resources = da9062_wdt_resources,
145 .of_compatible = "dlg,da9062-wdt",
146 },
147 {
148 .name = "da9062-thermal",
149 .num_resources = ARRAY_SIZE(da9062_thermal_resources),
150 .resources = da9062_thermal_resources,
151 .of_compatible = "dlg,da9062-thermal",
152 },
153 {
154 .name = "da9062-rtc",
155 .num_resources = ARRAY_SIZE(da9062_rtc_resources),
156 .resources = da9062_rtc_resources,
157 .of_compatible = "dlg,da9062-rtc",
158 },
159 {
160 .name = "da9062-onkey",
161 .num_resources = ARRAY_SIZE(da9062_onkey_resources),
162 .resources = da9062_onkey_resources,
163 .of_compatible = "dlg,da9062-onkey",
164 },
165};
166
167static int da9062_clear_fault_log(struct da9062 *chip)
168{
169 int ret;
170 int fault_log;
171
172 ret = regmap_read(chip->regmap, DA9062AA_FAULT_LOG, &fault_log);
173 if (ret < 0)
174 return ret;
175
176 if (fault_log) {
177 if (fault_log & DA9062AA_TWD_ERROR_MASK)
178 dev_dbg(chip->dev, "Fault log entry detected: TWD_ERROR\n");
179 if (fault_log & DA9062AA_POR_MASK)
180 dev_dbg(chip->dev, "Fault log entry detected: POR\n");
181 if (fault_log & DA9062AA_VDD_FAULT_MASK)
182 dev_dbg(chip->dev, "Fault log entry detected: VDD_FAULT\n");
183 if (fault_log & DA9062AA_VDD_START_MASK)
184 dev_dbg(chip->dev, "Fault log entry detected: VDD_START\n");
185 if (fault_log & DA9062AA_TEMP_CRIT_MASK)
186 dev_dbg(chip->dev, "Fault log entry detected: TEMP_CRIT\n");
187 if (fault_log & DA9062AA_KEY_RESET_MASK)
188 dev_dbg(chip->dev, "Fault log entry detected: KEY_RESET\n");
189 if (fault_log & DA9062AA_NSHUTDOWN_MASK)
190 dev_dbg(chip->dev, "Fault log entry detected: NSHUTDOWN\n");
191 if (fault_log & DA9062AA_WAIT_SHUT_MASK)
192 dev_dbg(chip->dev, "Fault log entry detected: WAIT_SHUT\n");
193
194 ret = regmap_write(chip->regmap, DA9062AA_FAULT_LOG,
195 fault_log);
196 }
197
198 return ret;
199}
200
201static int da9062_get_device_type(struct da9062 *chip)
202{
203 int device_id, variant_id, variant_mrc;
204 int ret;
205
206 ret = regmap_read(chip->regmap, DA9062AA_DEVICE_ID, &device_id);
207 if (ret < 0) {
208 dev_err(chip->dev, "Cannot read chip ID.\n");
209 return -EIO;
210 }
211 if (device_id != DA9062_PMIC_DEVICE_ID) {
212 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
213 return -ENODEV;
214 }
215
216 ret = regmap_read(chip->regmap, DA9062AA_VARIANT_ID, &variant_id);
217 if (ret < 0) {
218 dev_err(chip->dev, "Cannot read chip variant id.\n");
219 return -EIO;
220 }
221
222 dev_info(chip->dev,
223 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X)\n",
224 device_id, variant_id);
225
226 variant_mrc = (variant_id & DA9062AA_MRC_MASK) >> DA9062AA_MRC_SHIFT;
227
228 if (variant_mrc < DA9062_PMIC_VARIANT_MRC_AA) {
229 dev_err(chip->dev,
230 "Cannot support variant MRC: 0x%02X\n", variant_mrc);
231 return -ENODEV;
232 }
233
234 return ret;
235}
236
237static const struct regmap_range da9062_aa_readable_ranges[] = {
238 {
239 .range_min = DA9062AA_PAGE_CON,
240 .range_max = DA9062AA_STATUS_B,
241 }, {
242 .range_min = DA9062AA_STATUS_D,
243 .range_max = DA9062AA_EVENT_C,
244 }, {
245 .range_min = DA9062AA_IRQ_MASK_A,
246 .range_max = DA9062AA_IRQ_MASK_C,
247 }, {
248 .range_min = DA9062AA_CONTROL_A,
249 .range_max = DA9062AA_GPIO_4,
250 }, {
251 .range_min = DA9062AA_GPIO_WKUP_MODE,
252 .range_max = DA9062AA_BUCK4_CONT,
253 }, {
254 .range_min = DA9062AA_BUCK3_CONT,
255 .range_max = DA9062AA_BUCK3_CONT,
256 }, {
257 .range_min = DA9062AA_LDO1_CONT,
258 .range_max = DA9062AA_LDO4_CONT,
259 }, {
260 .range_min = DA9062AA_DVC_1,
261 .range_max = DA9062AA_DVC_1,
262 }, {
263 .range_min = DA9062AA_COUNT_S,
264 .range_max = DA9062AA_SECOND_D,
265 }, {
266 .range_min = DA9062AA_SEQ,
267 .range_max = DA9062AA_ID_4_3,
268 }, {
269 .range_min = DA9062AA_ID_12_11,
270 .range_max = DA9062AA_ID_16_15,
271 }, {
272 .range_min = DA9062AA_ID_22_21,
273 .range_max = DA9062AA_ID_32_31,
274 }, {
275 .range_min = DA9062AA_SEQ_A,
276 .range_max = DA9062AA_BUCK3_CFG,
277 }, {
278 .range_min = DA9062AA_VBUCK2_A,
279 .range_max = DA9062AA_VBUCK4_A,
280 }, {
281 .range_min = DA9062AA_VBUCK3_A,
282 .range_max = DA9062AA_VBUCK3_A,
283 }, {
284 .range_min = DA9062AA_VLDO1_A,
285 .range_max = DA9062AA_VLDO4_A,
286 }, {
287 .range_min = DA9062AA_VBUCK2_B,
288 .range_max = DA9062AA_VBUCK4_B,
289 }, {
290 .range_min = DA9062AA_VBUCK3_B,
291 .range_max = DA9062AA_VBUCK3_B,
292 }, {
293 .range_min = DA9062AA_VLDO1_B,
294 .range_max = DA9062AA_VLDO4_B,
295 }, {
296 .range_min = DA9062AA_BBAT_CONT,
297 .range_max = DA9062AA_BBAT_CONT,
298 }, {
299 .range_min = DA9062AA_INTERFACE,
300 .range_max = DA9062AA_CONFIG_E,
301 }, {
302 .range_min = DA9062AA_CONFIG_G,
303 .range_max = DA9062AA_CONFIG_K,
304 }, {
305 .range_min = DA9062AA_CONFIG_M,
306 .range_max = DA9062AA_CONFIG_M,
307 }, {
308 .range_min = DA9062AA_TRIM_CLDR,
309 .range_max = DA9062AA_GP_ID_19,
310 }, {
311 .range_min = DA9062AA_DEVICE_ID,
312 .range_max = DA9062AA_CONFIG_ID,
313 },
314};
315
316static const struct regmap_range da9062_aa_writeable_ranges[] = {
317 {
318 .range_min = DA9062AA_PAGE_CON,
319 .range_max = DA9062AA_PAGE_CON,
320 }, {
321 .range_min = DA9062AA_FAULT_LOG,
322 .range_max = DA9062AA_EVENT_C,
323 }, {
324 .range_min = DA9062AA_IRQ_MASK_A,
325 .range_max = DA9062AA_IRQ_MASK_C,
326 }, {
327 .range_min = DA9062AA_CONTROL_A,
328 .range_max = DA9062AA_GPIO_4,
329 }, {
330 .range_min = DA9062AA_GPIO_WKUP_MODE,
331 .range_max = DA9062AA_BUCK4_CONT,
332 }, {
333 .range_min = DA9062AA_BUCK3_CONT,
334 .range_max = DA9062AA_BUCK3_CONT,
335 }, {
336 .range_min = DA9062AA_LDO1_CONT,
337 .range_max = DA9062AA_LDO4_CONT,
338 }, {
339 .range_min = DA9062AA_DVC_1,
340 .range_max = DA9062AA_DVC_1,
341 }, {
342 .range_min = DA9062AA_COUNT_S,
343 .range_max = DA9062AA_ALARM_Y,
344 }, {
345 .range_min = DA9062AA_SEQ,
346 .range_max = DA9062AA_ID_4_3,
347 }, {
348 .range_min = DA9062AA_ID_12_11,
349 .range_max = DA9062AA_ID_16_15,
350 }, {
351 .range_min = DA9062AA_ID_22_21,
352 .range_max = DA9062AA_ID_32_31,
353 }, {
354 .range_min = DA9062AA_SEQ_A,
355 .range_max = DA9062AA_BUCK3_CFG,
356 }, {
357 .range_min = DA9062AA_VBUCK2_A,
358 .range_max = DA9062AA_VBUCK4_A,
359 }, {
360 .range_min = DA9062AA_VBUCK3_A,
361 .range_max = DA9062AA_VBUCK3_A,
362 }, {
363 .range_min = DA9062AA_VLDO1_A,
364 .range_max = DA9062AA_VLDO4_A,
365 }, {
366 .range_min = DA9062AA_VBUCK2_B,
367 .range_max = DA9062AA_VBUCK4_B,
368 }, {
369 .range_min = DA9062AA_VBUCK3_B,
370 .range_max = DA9062AA_VBUCK3_B,
371 }, {
372 .range_min = DA9062AA_VLDO1_B,
373 .range_max = DA9062AA_VLDO4_B,
374 }, {
375 .range_min = DA9062AA_BBAT_CONT,
376 .range_max = DA9062AA_BBAT_CONT,
377 }, {
378 .range_min = DA9062AA_GP_ID_0,
379 .range_max = DA9062AA_GP_ID_19,
380 },
381};
382
383static const struct regmap_range da9062_aa_volatile_ranges[] = {
384 {
385 .range_min = DA9062AA_PAGE_CON,
386 .range_max = DA9062AA_STATUS_B,
387 }, {
388 .range_min = DA9062AA_STATUS_D,
389 .range_max = DA9062AA_EVENT_C,
390 }, {
391 .range_min = DA9062AA_CONTROL_A,
392 .range_max = DA9062AA_CONTROL_B,
393 }, {
394 .range_min = DA9062AA_CONTROL_E,
395 .range_max = DA9062AA_CONTROL_F,
396 }, {
397 .range_min = DA9062AA_BUCK2_CONT,
398 .range_max = DA9062AA_BUCK4_CONT,
399 }, {
400 .range_min = DA9062AA_BUCK3_CONT,
401 .range_max = DA9062AA_BUCK3_CONT,
402 }, {
403 .range_min = DA9062AA_LDO1_CONT,
404 .range_max = DA9062AA_LDO4_CONT,
405 }, {
406 .range_min = DA9062AA_DVC_1,
407 .range_max = DA9062AA_DVC_1,
408 }, {
409 .range_min = DA9062AA_COUNT_S,
410 .range_max = DA9062AA_SECOND_D,
411 }, {
412 .range_min = DA9062AA_SEQ,
413 .range_max = DA9062AA_SEQ,
414 }, {
415 .range_min = DA9062AA_EN_32K,
416 .range_max = DA9062AA_EN_32K,
417 },
418};
419
420static const struct regmap_access_table da9062_aa_readable_table = {
421 .yes_ranges = da9062_aa_readable_ranges,
422 .n_yes_ranges = ARRAY_SIZE(da9062_aa_readable_ranges),
423};
424
425static const struct regmap_access_table da9062_aa_writeable_table = {
426 .yes_ranges = da9062_aa_writeable_ranges,
427 .n_yes_ranges = ARRAY_SIZE(da9062_aa_writeable_ranges),
428};
429
430static const struct regmap_access_table da9062_aa_volatile_table = {
431 .yes_ranges = da9062_aa_volatile_ranges,
432 .n_yes_ranges = ARRAY_SIZE(da9062_aa_volatile_ranges),
433};
434
435static const struct regmap_range_cfg da9062_range_cfg[] = {
436 {
437 .range_min = DA9062AA_PAGE_CON,
438 .range_max = DA9062AA_CONFIG_ID,
439 .selector_reg = DA9062AA_PAGE_CON,
440 .selector_mask = 1 << DA9062_I2C_PAGE_SEL_SHIFT,
441 .selector_shift = DA9062_I2C_PAGE_SEL_SHIFT,
442 .window_start = 0,
443 .window_len = 256,
444 }
445};
446
447static struct regmap_config da9062_regmap_config = {
448 .reg_bits = 8,
449 .val_bits = 8,
450 .ranges = da9062_range_cfg,
451 .num_ranges = ARRAY_SIZE(da9062_range_cfg),
452 .max_register = DA9062AA_CONFIG_ID,
453 .cache_type = REGCACHE_RBTREE,
454 .rd_table = &da9062_aa_readable_table,
455 .wr_table = &da9062_aa_writeable_table,
456 .volatile_table = &da9062_aa_volatile_table,
457};
458
459static int da9062_i2c_probe(struct i2c_client *i2c,
460 const struct i2c_device_id *id)
461{
462 struct da9062 *chip;
463 unsigned int irq_base;
464 int ret;
465
466 chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
467 if (!chip)
468 return -ENOMEM;
469
470 i2c_set_clientdata(i2c, chip);
471 chip->dev = &i2c->dev;
472
473 if (!i2c->irq) {
474 dev_err(chip->dev, "No IRQ configured\n");
475 return -EINVAL;
476 }
477
478 chip->regmap = devm_regmap_init_i2c(i2c, &da9062_regmap_config);
479 if (IS_ERR(chip->regmap)) {
480 ret = PTR_ERR(chip->regmap);
481 dev_err(chip->dev, "Failed to allocate register map: %d\n",
482 ret);
483 return ret;
484 }
485
486 ret = da9062_clear_fault_log(chip);
487 if (ret < 0)
488 dev_warn(chip->dev, "Cannot clear fault log\n");
489
490 ret = da9062_get_device_type(chip);
491 if (ret)
492 return ret;
493
494 ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
495 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
496 -1, &da9062_irq_chip,
497 &chip->regmap_irq);
498 if (ret) {
499 dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
500 i2c->irq, ret);
501 return ret;
502 }
503
504 irq_base = regmap_irq_chip_get_base(chip->regmap_irq);
505
506 ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, da9062_devs,
507 ARRAY_SIZE(da9062_devs), NULL, irq_base,
508 NULL);
509 if (ret) {
510 dev_err(chip->dev, "Cannot register child devices\n");
511 regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
512 return ret;
513 }
514
515 return ret;
516}
517
518static int da9062_i2c_remove(struct i2c_client *i2c)
519{
520 struct da9062 *chip = i2c_get_clientdata(i2c);
521
522 mfd_remove_devices(chip->dev);
523 regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
524
525 return 0;
526}
527
528static const struct i2c_device_id da9062_i2c_id[] = {
529 { "da9062", 0 },
530 { },
531};
532MODULE_DEVICE_TABLE(i2c, da9062_i2c_id);
533
534static const struct of_device_id da9062_dt_ids[] = {
535 { .compatible = "dlg,da9062", },
536 { }
537};
538MODULE_DEVICE_TABLE(of, da9062_dt_ids);
539
540static struct i2c_driver da9062_i2c_driver = {
541 .driver = {
542 .name = "da9062",
543 .of_match_table = of_match_ptr(da9062_dt_ids),
544 },
545 .probe = da9062_i2c_probe,
546 .remove = da9062_i2c_remove,
547 .id_table = da9062_i2c_id,
548};
549
550module_i2c_driver(da9062_i2c_driver);
551
552MODULE_DESCRIPTION("Core device driver for Dialog DA9062");
553MODULE_AUTHOR("Steve Twiss <stwiss.opensource@diasemi.com>");
554MODULE_LICENSE("GPL");