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27#include <linux/i2c.h>
28#include <linux/interrupt.h>
29#include <linux/mfd/core.h>
30#include <linux/mfd/max77620.h>
31#include <linux/init.h>
32#include <linux/of.h>
33#include <linux/of_device.h>
34#include <linux/regmap.h>
35#include <linux/slab.h>
36
37static struct max77620_chip *max77620_scratch;
38
39static const struct resource gpio_resources[] = {
40 DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
41};
42
43static const struct resource power_resources[] = {
44 DEFINE_RES_IRQ(MAX77620_IRQ_LBT_MBATLOW),
45};
46
47static const struct resource rtc_resources[] = {
48 DEFINE_RES_IRQ(MAX77620_IRQ_TOP_RTC),
49};
50
51static const struct resource thermal_resources[] = {
52 DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM1),
53 DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM2),
54};
55
56static const struct regmap_irq max77620_top_irqs[] = {
57 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_GLBL, 0, MAX77620_IRQ_TOP_GLBL_MASK),
58 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_SD, 0, MAX77620_IRQ_TOP_SD_MASK),
59 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_LDO, 0, MAX77620_IRQ_TOP_LDO_MASK),
60 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_GPIO, 0, MAX77620_IRQ_TOP_GPIO_MASK),
61 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_RTC, 0, MAX77620_IRQ_TOP_RTC_MASK),
62 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_32K, 0, MAX77620_IRQ_TOP_32K_MASK),
63 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_ONOFF, 0, MAX77620_IRQ_TOP_ONOFF_MASK),
64 REGMAP_IRQ_REG(MAX77620_IRQ_LBT_MBATLOW, 1, MAX77620_IRQ_LBM_MASK),
65 REGMAP_IRQ_REG(MAX77620_IRQ_LBT_TJALRM1, 1, MAX77620_IRQ_TJALRM1_MASK),
66 REGMAP_IRQ_REG(MAX77620_IRQ_LBT_TJALRM2, 1, MAX77620_IRQ_TJALRM2_MASK),
67};
68
69static const struct mfd_cell max77620_children[] = {
70 { .name = "max77620-pinctrl", },
71 { .name = "max77620-clock", },
72 { .name = "max77620-pmic", },
73 { .name = "max77620-watchdog", },
74 {
75 .name = "max77620-gpio",
76 .resources = gpio_resources,
77 .num_resources = ARRAY_SIZE(gpio_resources),
78 }, {
79 .name = "max77620-rtc",
80 .resources = rtc_resources,
81 .num_resources = ARRAY_SIZE(rtc_resources),
82 }, {
83 .name = "max77620-power",
84 .resources = power_resources,
85 .num_resources = ARRAY_SIZE(power_resources),
86 }, {
87 .name = "max77620-thermal",
88 .resources = thermal_resources,
89 .num_resources = ARRAY_SIZE(thermal_resources),
90 },
91};
92
93static const struct mfd_cell max20024_children[] = {
94 { .name = "max20024-pinctrl", },
95 { .name = "max77620-clock", },
96 { .name = "max20024-pmic", },
97 { .name = "max77620-watchdog", },
98 {
99 .name = "max77620-gpio",
100 .resources = gpio_resources,
101 .num_resources = ARRAY_SIZE(gpio_resources),
102 }, {
103 .name = "max77620-rtc",
104 .resources = rtc_resources,
105 .num_resources = ARRAY_SIZE(rtc_resources),
106 }, {
107 .name = "max20024-power",
108 .resources = power_resources,
109 .num_resources = ARRAY_SIZE(power_resources),
110 },
111};
112
113static const struct mfd_cell max77663_children[] = {
114 { .name = "max77620-pinctrl", },
115 { .name = "max77620-clock", },
116 { .name = "max77663-pmic", },
117 { .name = "max77620-watchdog", },
118 {
119 .name = "max77620-gpio",
120 .resources = gpio_resources,
121 .num_resources = ARRAY_SIZE(gpio_resources),
122 }, {
123 .name = "max77620-rtc",
124 .resources = rtc_resources,
125 .num_resources = ARRAY_SIZE(rtc_resources),
126 }, {
127 .name = "max77663-power",
128 .resources = power_resources,
129 .num_resources = ARRAY_SIZE(power_resources),
130 },
131};
132
133static const struct regmap_range max77620_readable_ranges[] = {
134 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
135};
136
137static const struct regmap_access_table max77620_readable_table = {
138 .yes_ranges = max77620_readable_ranges,
139 .n_yes_ranges = ARRAY_SIZE(max77620_readable_ranges),
140};
141
142static const struct regmap_range max20024_readable_ranges[] = {
143 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
144 regmap_reg_range(MAX20024_REG_MAX_ADD, MAX20024_REG_MAX_ADD),
145};
146
147static const struct regmap_access_table max20024_readable_table = {
148 .yes_ranges = max20024_readable_ranges,
149 .n_yes_ranges = ARRAY_SIZE(max20024_readable_ranges),
150};
151
152static const struct regmap_range max77620_writable_ranges[] = {
153 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
154};
155
156static const struct regmap_access_table max77620_writable_table = {
157 .yes_ranges = max77620_writable_ranges,
158 .n_yes_ranges = ARRAY_SIZE(max77620_writable_ranges),
159};
160
161static const struct regmap_range max77620_cacheable_ranges[] = {
162 regmap_reg_range(MAX77620_REG_SD0_CFG, MAX77620_REG_LDO_CFG3),
163 regmap_reg_range(MAX77620_REG_FPS_CFG0, MAX77620_REG_FPS_SD3),
164};
165
166static const struct regmap_access_table max77620_volatile_table = {
167 .no_ranges = max77620_cacheable_ranges,
168 .n_no_ranges = ARRAY_SIZE(max77620_cacheable_ranges),
169};
170
171static const struct regmap_config max77620_regmap_config = {
172 .name = "power-slave",
173 .reg_bits = 8,
174 .val_bits = 8,
175 .max_register = MAX77620_REG_DVSSD4 + 1,
176 .cache_type = REGCACHE_RBTREE,
177 .rd_table = &max77620_readable_table,
178 .wr_table = &max77620_writable_table,
179 .volatile_table = &max77620_volatile_table,
180 .use_single_write = true,
181};
182
183static const struct regmap_config max20024_regmap_config = {
184 .name = "power-slave",
185 .reg_bits = 8,
186 .val_bits = 8,
187 .max_register = MAX20024_REG_MAX_ADD + 1,
188 .cache_type = REGCACHE_RBTREE,
189 .rd_table = &max20024_readable_table,
190 .wr_table = &max77620_writable_table,
191 .volatile_table = &max77620_volatile_table,
192};
193
194static const struct regmap_range max77663_readable_ranges[] = {
195 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5),
196};
197
198static const struct regmap_access_table max77663_readable_table = {
199 .yes_ranges = max77663_readable_ranges,
200 .n_yes_ranges = ARRAY_SIZE(max77663_readable_ranges),
201};
202
203static const struct regmap_range max77663_writable_ranges[] = {
204 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5),
205};
206
207static const struct regmap_access_table max77663_writable_table = {
208 .yes_ranges = max77663_writable_ranges,
209 .n_yes_ranges = ARRAY_SIZE(max77663_writable_ranges),
210};
211
212static const struct regmap_config max77663_regmap_config = {
213 .name = "power-slave",
214 .reg_bits = 8,
215 .val_bits = 8,
216 .max_register = MAX77620_REG_CID5 + 1,
217 .cache_type = REGCACHE_RBTREE,
218 .rd_table = &max77663_readable_table,
219 .wr_table = &max77663_writable_table,
220 .volatile_table = &max77620_volatile_table,
221};
222
223
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228
229
230
231static int max77620_irq_global_mask(void *irq_drv_data)
232{
233 struct max77620_chip *chip = irq_drv_data;
234 int ret;
235
236 ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT,
237 MAX77620_GLBLM_MASK, MAX77620_GLBLM_MASK);
238 if (ret < 0)
239 dev_err(chip->dev, "Failed to set GLBLM: %d\n", ret);
240
241 return ret;
242}
243
244static int max77620_irq_global_unmask(void *irq_drv_data)
245{
246 struct max77620_chip *chip = irq_drv_data;
247 int ret;
248
249 ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT,
250 MAX77620_GLBLM_MASK, 0);
251 if (ret < 0)
252 dev_err(chip->dev, "Failed to reset GLBLM: %d\n", ret);
253
254 return ret;
255}
256
257static struct regmap_irq_chip max77620_top_irq_chip = {
258 .name = "max77620-top",
259 .irqs = max77620_top_irqs,
260 .num_irqs = ARRAY_SIZE(max77620_top_irqs),
261 .num_regs = 2,
262 .status_base = MAX77620_REG_IRQTOP,
263 .mask_base = MAX77620_REG_IRQTOPM,
264 .handle_pre_irq = max77620_irq_global_mask,
265 .handle_post_irq = max77620_irq_global_unmask,
266};
267
268
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270
271
272
273
274
275
276
277
278
279static int max77620_get_fps_period_reg_value(struct max77620_chip *chip,
280 int tperiod)
281{
282 int fps_min_period;
283 int i;
284
285 switch (chip->chip_id) {
286 case MAX20024:
287 fps_min_period = MAX20024_FPS_PERIOD_MIN_US;
288 break;
289 case MAX77620:
290 fps_min_period = MAX77620_FPS_PERIOD_MIN_US;
291 break;
292 case MAX77663:
293 fps_min_period = MAX20024_FPS_PERIOD_MIN_US;
294 break;
295 default:
296 return -EINVAL;
297 }
298
299 for (i = 0; i < 7; i++) {
300 if (fps_min_period >= tperiod)
301 return i;
302 fps_min_period *= 2;
303 }
304
305 return i;
306}
307
308
309
310
311static int max77620_config_fps(struct max77620_chip *chip,
312 struct device_node *fps_np)
313{
314 struct device *dev = chip->dev;
315 unsigned int mask = 0, config = 0;
316 u32 fps_max_period;
317 u32 param_val;
318 int tperiod, fps_id;
319 int ret;
320 char fps_name[10];
321
322 switch (chip->chip_id) {
323 case MAX20024:
324 fps_max_period = MAX20024_FPS_PERIOD_MAX_US;
325 break;
326 case MAX77620:
327 fps_max_period = MAX77620_FPS_PERIOD_MAX_US;
328 break;
329 case MAX77663:
330 fps_max_period = MAX20024_FPS_PERIOD_MAX_US;
331 break;
332 default:
333 return -EINVAL;
334 }
335
336 for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) {
337 sprintf(fps_name, "fps%d", fps_id);
338 if (of_node_name_eq(fps_np, fps_name))
339 break;
340 }
341
342 if (fps_id == MAX77620_FPS_COUNT) {
343 dev_err(dev, "FPS node name %pOFn is not valid\n", fps_np);
344 return -EINVAL;
345 }
346
347 ret = of_property_read_u32(fps_np, "maxim,shutdown-fps-time-period-us",
348 ¶m_val);
349 if (!ret) {
350 mask |= MAX77620_FPS_TIME_PERIOD_MASK;
351 chip->shutdown_fps_period[fps_id] = min(param_val,
352 fps_max_period);
353 tperiod = max77620_get_fps_period_reg_value(chip,
354 chip->shutdown_fps_period[fps_id]);
355 config |= tperiod << MAX77620_FPS_TIME_PERIOD_SHIFT;
356 }
357
358 ret = of_property_read_u32(fps_np, "maxim,suspend-fps-time-period-us",
359 ¶m_val);
360 if (!ret)
361 chip->suspend_fps_period[fps_id] = min(param_val,
362 fps_max_period);
363
364 ret = of_property_read_u32(fps_np, "maxim,fps-event-source",
365 ¶m_val);
366 if (!ret) {
367 if (param_val > 2) {
368 dev_err(dev, "FPS%d event-source invalid\n", fps_id);
369 return -EINVAL;
370 }
371 mask |= MAX77620_FPS_EN_SRC_MASK;
372 config |= param_val << MAX77620_FPS_EN_SRC_SHIFT;
373 if (param_val == 2) {
374 mask |= MAX77620_FPS_ENFPS_SW_MASK;
375 config |= MAX77620_FPS_ENFPS_SW;
376 }
377 }
378
379 if (!chip->sleep_enable && !chip->enable_global_lpm) {
380 ret = of_property_read_u32(fps_np,
381 "maxim,device-state-on-disabled-event",
382 ¶m_val);
383 if (!ret) {
384 if (param_val == 0)
385 chip->sleep_enable = true;
386 else if (param_val == 1)
387 chip->enable_global_lpm = true;
388 }
389 }
390
391 ret = regmap_update_bits(chip->rmap, MAX77620_REG_FPS_CFG0 + fps_id,
392 mask, config);
393 if (ret < 0) {
394 dev_err(dev, "Failed to update FPS CFG: %d\n", ret);
395 return ret;
396 }
397
398 return 0;
399}
400
401static int max77620_initialise_fps(struct max77620_chip *chip)
402{
403 struct device *dev = chip->dev;
404 struct device_node *fps_np, *fps_child;
405 u8 config;
406 int fps_id;
407 int ret;
408
409 for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) {
410 chip->shutdown_fps_period[fps_id] = -1;
411 chip->suspend_fps_period[fps_id] = -1;
412 }
413
414 fps_np = of_get_child_by_name(dev->of_node, "fps");
415 if (!fps_np)
416 goto skip_fps;
417
418 for_each_child_of_node(fps_np, fps_child) {
419 ret = max77620_config_fps(chip, fps_child);
420 if (ret < 0) {
421 of_node_put(fps_child);
422 return ret;
423 }
424 }
425
426 config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0;
427 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
428 MAX77620_ONOFFCNFG2_SLP_LPM_MSK, config);
429 if (ret < 0) {
430 dev_err(dev, "Failed to update SLP_LPM: %d\n", ret);
431 return ret;
432 }
433
434skip_fps:
435 if (chip->chip_id == MAX77663)
436 return 0;
437
438
439 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
440 MAX77620_ONOFFCNFG2_WK_EN0,
441 MAX77620_ONOFFCNFG2_WK_EN0);
442 if (ret < 0) {
443 dev_err(dev, "Failed to update WK_EN0: %d\n", ret);
444 return ret;
445 }
446
447
448 if ((chip->chip_id == MAX20024) && chip->sleep_enable) {
449 config = MAX77620_ONOFFCNFG1_SLPEN | MAX20024_ONOFFCNFG1_CLRSE;
450 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
451 config, config);
452 if (ret < 0) {
453 dev_err(dev, "Failed to update SLPEN: %d\n", ret);
454 return ret;
455 }
456 }
457
458 return 0;
459}
460
461static int max77620_read_es_version(struct max77620_chip *chip)
462{
463 unsigned int val;
464 u8 cid_val[6];
465 int i;
466 int ret;
467
468 for (i = MAX77620_REG_CID0; i <= MAX77620_REG_CID5; i++) {
469 ret = regmap_read(chip->rmap, i, &val);
470 if (ret < 0) {
471 dev_err(chip->dev, "Failed to read CID: %d\n", ret);
472 return ret;
473 }
474 dev_dbg(chip->dev, "CID%d: 0x%02x\n",
475 i - MAX77620_REG_CID0, val);
476 cid_val[i - MAX77620_REG_CID0] = val;
477 }
478
479
480 dev_info(chip->dev, "PMIC Version OTP:0x%02X and ES:0x%X\n",
481 cid_val[4], MAX77620_CID5_DIDM(cid_val[5]));
482
483 return ret;
484}
485
486static void max77620_pm_power_off(void)
487{
488 struct max77620_chip *chip = max77620_scratch;
489
490 regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
491 MAX77620_ONOFFCNFG1_SFT_RST,
492 MAX77620_ONOFFCNFG1_SFT_RST);
493}
494
495static int max77620_probe(struct i2c_client *client,
496 const struct i2c_device_id *id)
497{
498 const struct regmap_config *rmap_config;
499 struct max77620_chip *chip;
500 const struct mfd_cell *mfd_cells;
501 int n_mfd_cells;
502 bool pm_off;
503 int ret;
504
505 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
506 if (!chip)
507 return -ENOMEM;
508
509 i2c_set_clientdata(client, chip);
510 chip->dev = &client->dev;
511 chip->chip_irq = client->irq;
512 chip->chip_id = (enum max77620_chip_id)id->driver_data;
513
514 switch (chip->chip_id) {
515 case MAX77620:
516 mfd_cells = max77620_children;
517 n_mfd_cells = ARRAY_SIZE(max77620_children);
518 rmap_config = &max77620_regmap_config;
519 break;
520 case MAX20024:
521 mfd_cells = max20024_children;
522 n_mfd_cells = ARRAY_SIZE(max20024_children);
523 rmap_config = &max20024_regmap_config;
524 break;
525 case MAX77663:
526 mfd_cells = max77663_children;
527 n_mfd_cells = ARRAY_SIZE(max77663_children);
528 rmap_config = &max77663_regmap_config;
529 break;
530 default:
531 dev_err(chip->dev, "ChipID is invalid %d\n", chip->chip_id);
532 return -EINVAL;
533 }
534
535 chip->rmap = devm_regmap_init_i2c(client, rmap_config);
536 if (IS_ERR(chip->rmap)) {
537 ret = PTR_ERR(chip->rmap);
538 dev_err(chip->dev, "Failed to initialise regmap: %d\n", ret);
539 return ret;
540 }
541
542 ret = max77620_read_es_version(chip);
543 if (ret < 0)
544 return ret;
545
546 max77620_top_irq_chip.irq_drv_data = chip;
547 ret = devm_regmap_add_irq_chip(chip->dev, chip->rmap, client->irq,
548 IRQF_ONESHOT | IRQF_SHARED, 0,
549 &max77620_top_irq_chip,
550 &chip->top_irq_data);
551 if (ret < 0) {
552 dev_err(chip->dev, "Failed to add regmap irq: %d\n", ret);
553 return ret;
554 }
555
556 ret = max77620_initialise_fps(chip);
557 if (ret < 0)
558 return ret;
559
560 ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
561 mfd_cells, n_mfd_cells, NULL, 0,
562 regmap_irq_get_domain(chip->top_irq_data));
563 if (ret < 0) {
564 dev_err(chip->dev, "Failed to add MFD children: %d\n", ret);
565 return ret;
566 }
567
568 pm_off = of_device_is_system_power_controller(client->dev.of_node);
569 if (pm_off && !pm_power_off) {
570 max77620_scratch = chip;
571 pm_power_off = max77620_pm_power_off;
572 }
573
574 return 0;
575}
576
577#ifdef CONFIG_PM_SLEEP
578static int max77620_set_fps_period(struct max77620_chip *chip,
579 int fps_id, int time_period)
580{
581 int period = max77620_get_fps_period_reg_value(chip, time_period);
582 int ret;
583
584 ret = regmap_update_bits(chip->rmap, MAX77620_REG_FPS_CFG0 + fps_id,
585 MAX77620_FPS_TIME_PERIOD_MASK,
586 period << MAX77620_FPS_TIME_PERIOD_SHIFT);
587 if (ret < 0) {
588 dev_err(chip->dev, "Failed to update FPS period: %d\n", ret);
589 return ret;
590 }
591
592 return 0;
593}
594
595static int max77620_i2c_suspend(struct device *dev)
596{
597 struct max77620_chip *chip = dev_get_drvdata(dev);
598 struct i2c_client *client = to_i2c_client(dev);
599 unsigned int config;
600 int fps;
601 int ret;
602
603 for (fps = 0; fps < MAX77620_FPS_COUNT; fps++) {
604 if (chip->suspend_fps_period[fps] < 0)
605 continue;
606
607 ret = max77620_set_fps_period(chip, fps,
608 chip->suspend_fps_period[fps]);
609 if (ret < 0)
610 return ret;
611 }
612
613
614
615
616
617 if (chip->chip_id == MAX20024)
618 goto out;
619
620 config = (chip->sleep_enable) ? MAX77620_ONOFFCNFG1_SLPEN : 0;
621 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
622 MAX77620_ONOFFCNFG1_SLPEN,
623 config);
624 if (ret < 0) {
625 dev_err(dev, "Failed to configure sleep in suspend: %d\n", ret);
626 return ret;
627 }
628
629 if (chip->chip_id == MAX77663)
630 goto out;
631
632
633 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
634 MAX77620_ONOFFCNFG2_WK_EN0, 0);
635 if (ret < 0) {
636 dev_err(dev, "Failed to configure WK_EN in suspend: %d\n", ret);
637 return ret;
638 }
639
640out:
641 disable_irq(client->irq);
642
643 return 0;
644}
645
646static int max77620_i2c_resume(struct device *dev)
647{
648 struct max77620_chip *chip = dev_get_drvdata(dev);
649 struct i2c_client *client = to_i2c_client(dev);
650 int ret;
651 int fps;
652
653 for (fps = 0; fps < MAX77620_FPS_COUNT; fps++) {
654 if (chip->shutdown_fps_period[fps] < 0)
655 continue;
656
657 ret = max77620_set_fps_period(chip, fps,
658 chip->shutdown_fps_period[fps]);
659 if (ret < 0)
660 return ret;
661 }
662
663
664
665
666
667 if (chip->chip_id == MAX20024 || chip->chip_id == MAX77663)
668 goto out;
669
670
671 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
672 MAX77620_ONOFFCNFG2_WK_EN0,
673 MAX77620_ONOFFCNFG2_WK_EN0);
674 if (ret < 0) {
675 dev_err(dev, "Failed to configure WK_EN0 n resume: %d\n", ret);
676 return ret;
677 }
678
679out:
680 enable_irq(client->irq);
681
682 return 0;
683}
684#endif
685
686static const struct i2c_device_id max77620_id[] = {
687 {"max77620", MAX77620},
688 {"max20024", MAX20024},
689 {"max77663", MAX77663},
690 {},
691};
692
693static const struct dev_pm_ops max77620_pm_ops = {
694 SET_SYSTEM_SLEEP_PM_OPS(max77620_i2c_suspend, max77620_i2c_resume)
695};
696
697static struct i2c_driver max77620_driver = {
698 .driver = {
699 .name = "max77620",
700 .pm = &max77620_pm_ops,
701 },
702 .probe = max77620_probe,
703 .id_table = max77620_id,
704};
705builtin_i2c_driver(max77620_driver);
706
