Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: c643ed43ebbf9a28fae57a1c899ba15d8cfa3298 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
// SPDX-License-Identifier: GPL-2.0-only
/*
 * MAX77620 pin control driver.
 *
 * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
 *
 * Author:
 *	Chaitanya Bandi <bandik@nvidia.com>
 *	Laxman Dewangan <ldewangan@nvidia.com>
 */

#include <linux/mfd/max77620.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"

#define MAX77620_PIN_NUM 8

enum max77620_pin_ppdrv {
	MAX77620_PIN_UNCONFIG_DRV,
	MAX77620_PIN_OD_DRV,
	MAX77620_PIN_PP_DRV,
};

#define MAX77620_ACTIVE_FPS_SOURCE		(PIN_CONFIG_END + 1)
#define MAX77620_ACTIVE_FPS_POWER_ON_SLOTS	(PIN_CONFIG_END + 2)
#define MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS	(PIN_CONFIG_END + 3)
#define MAX77620_SUSPEND_FPS_SOURCE		(PIN_CONFIG_END + 4)
#define MAX77620_SUSPEND_FPS_POWER_ON_SLOTS	(PIN_CONFIG_END + 5)
#define MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS	(PIN_CONFIG_END + 6)

struct max77620_pin_function {
	const char *name;
	const char * const *groups;
	unsigned int ngroups;
	int mux_option;
};

static const struct pinconf_generic_params max77620_cfg_params[] = {
	{
		.property = "maxim,active-fps-source",
		.param = MAX77620_ACTIVE_FPS_SOURCE,
	}, {
		.property = "maxim,active-fps-power-up-slot",
		.param = MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
	}, {
		.property = "maxim,active-fps-power-down-slot",
		.param = MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
	}, {
		.property = "maxim,suspend-fps-source",
		.param = MAX77620_SUSPEND_FPS_SOURCE,
	}, {
		.property = "maxim,suspend-fps-power-up-slot",
		.param = MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
	}, {
		.property = "maxim,suspend-fps-power-down-slot",
		.param = MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
	},
};

enum max77620_alternate_pinmux_option {
	MAX77620_PINMUX_GPIO				= 0,
	MAX77620_PINMUX_LOW_POWER_MODE_CONTROL_IN	= 1,
	MAX77620_PINMUX_FLEXIBLE_POWER_SEQUENCER_OUT	= 2,
	MAX77620_PINMUX_32K_OUT1			= 3,
	MAX77620_PINMUX_SD0_DYNAMIC_VOLTAGE_SCALING_IN	= 4,
	MAX77620_PINMUX_SD1_DYNAMIC_VOLTAGE_SCALING_IN	= 5,
	MAX77620_PINMUX_REFERENCE_OUT			= 6,
};

struct max77620_pingroup {
	const char *name;
	const unsigned int pins[1];
	unsigned int npins;
	enum max77620_alternate_pinmux_option alt_option;
};

struct max77620_pin_info {
	enum max77620_pin_ppdrv drv_type;
	int pull_config;
};

struct max77620_fps_config {
	int active_fps_src;
	int active_power_up_slots;
	int active_power_down_slots;
	int suspend_fps_src;
	int suspend_power_up_slots;
	int suspend_power_down_slots;
};

struct max77620_pctrl_info {
	struct device *dev;
	struct pinctrl_dev *pctl;
	struct regmap *rmap;
	int pins_current_opt[MAX77620_GPIO_NR];
	const struct max77620_pin_function *functions;
	unsigned int num_functions;
	const struct max77620_pingroup *pin_groups;
	int num_pin_groups;
	const struct pinctrl_pin_desc *pins;
	unsigned int num_pins;
	struct max77620_pin_info pin_info[MAX77620_PIN_NUM];
	struct max77620_fps_config fps_config[MAX77620_PIN_NUM];
};

static const struct pinctrl_pin_desc max77620_pins_desc[] = {
	PINCTRL_PIN(MAX77620_GPIO0, "gpio0"),
	PINCTRL_PIN(MAX77620_GPIO1, "gpio1"),
	PINCTRL_PIN(MAX77620_GPIO2, "gpio2"),
	PINCTRL_PIN(MAX77620_GPIO3, "gpio3"),
	PINCTRL_PIN(MAX77620_GPIO4, "gpio4"),
	PINCTRL_PIN(MAX77620_GPIO5, "gpio5"),
	PINCTRL_PIN(MAX77620_GPIO6, "gpio6"),
	PINCTRL_PIN(MAX77620_GPIO7, "gpio7"),
};

static const char * const gpio_groups[] = {
	"gpio0",
	"gpio1",
	"gpio2",
	"gpio3",
	"gpio4",
	"gpio5",
	"gpio6",
	"gpio7",
};

#define FUNCTION_GROUP(fname, mux)			\
	{						\
		.name = fname,				\
		.groups = gpio_groups,			\
		.ngroups = ARRAY_SIZE(gpio_groups),	\
		.mux_option = MAX77620_PINMUX_##mux,	\
	}

static const struct max77620_pin_function max77620_pin_function[] = {
	FUNCTION_GROUP("gpio", GPIO),
	FUNCTION_GROUP("lpm-control-in", LOW_POWER_MODE_CONTROL_IN),
	FUNCTION_GROUP("fps-out", FLEXIBLE_POWER_SEQUENCER_OUT),
	FUNCTION_GROUP("32k-out1", 32K_OUT1),
	FUNCTION_GROUP("sd0-dvs-in", SD0_DYNAMIC_VOLTAGE_SCALING_IN),
	FUNCTION_GROUP("sd1-dvs-in", SD1_DYNAMIC_VOLTAGE_SCALING_IN),
	FUNCTION_GROUP("reference-out", REFERENCE_OUT),
};

#define MAX77620_PINGROUP(pg_name, pin_id, option) \
	{								\
		.name = #pg_name,					\
		.pins = {MAX77620_##pin_id},				\
		.npins = 1,						\
		.alt_option = MAX77620_PINMUX_##option,			\
	}

static const struct max77620_pingroup max77620_pingroups[] = {
	MAX77620_PINGROUP(gpio0, GPIO0, LOW_POWER_MODE_CONTROL_IN),
	MAX77620_PINGROUP(gpio1, GPIO1, FLEXIBLE_POWER_SEQUENCER_OUT),
	MAX77620_PINGROUP(gpio2, GPIO2, FLEXIBLE_POWER_SEQUENCER_OUT),
	MAX77620_PINGROUP(gpio3, GPIO3, FLEXIBLE_POWER_SEQUENCER_OUT),
	MAX77620_PINGROUP(gpio4, GPIO4, 32K_OUT1),
	MAX77620_PINGROUP(gpio5, GPIO5, SD0_DYNAMIC_VOLTAGE_SCALING_IN),
	MAX77620_PINGROUP(gpio6, GPIO6, SD1_DYNAMIC_VOLTAGE_SCALING_IN),
	MAX77620_PINGROUP(gpio7, GPIO7, REFERENCE_OUT),
};

static int max77620_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);

	return mpci->num_pin_groups;
}

static const char *max77620_pinctrl_get_group_name(
		struct pinctrl_dev *pctldev, unsigned int group)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);

	return mpci->pin_groups[group].name;
}

static int max77620_pinctrl_get_group_pins(
		struct pinctrl_dev *pctldev, unsigned int group,
		const unsigned int **pins, unsigned int *num_pins)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);

	*pins = mpci->pin_groups[group].pins;
	*num_pins = mpci->pin_groups[group].npins;

	return 0;
}

static const struct pinctrl_ops max77620_pinctrl_ops = {
	.get_groups_count = max77620_pinctrl_get_groups_count,
	.get_group_name = max77620_pinctrl_get_group_name,
	.get_group_pins = max77620_pinctrl_get_group_pins,
	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
	.dt_free_map = pinctrl_utils_free_map,
};

static int max77620_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);

	return mpci->num_functions;
}

static const char *max77620_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
						  unsigned int function)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);

	return mpci->functions[function].name;
}

static int max77620_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
					    unsigned int function,
					    const char * const **groups,
					    unsigned int * const num_groups)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);

	*groups = mpci->functions[function].groups;
	*num_groups = mpci->functions[function].ngroups;

	return 0;
}

static int max77620_pinctrl_enable(struct pinctrl_dev *pctldev,
				   unsigned int function, unsigned int group)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
	u8 val;
	int ret;

	if (function == MAX77620_PINMUX_GPIO) {
		val = 0;
	} else if (function == mpci->pin_groups[group].alt_option) {
		val = 1 << group;
	} else {
		dev_err(mpci->dev, "GPIO %u doesn't have function %u\n",
			group, function);
		return -EINVAL;
	}
	ret = regmap_update_bits(mpci->rmap, MAX77620_REG_AME_GPIO,
				 BIT(group), val);
	if (ret < 0)
		dev_err(mpci->dev, "REG AME GPIO update failed: %d\n", ret);

	return ret;
}

static const struct pinmux_ops max77620_pinmux_ops = {
	.get_functions_count	= max77620_pinctrl_get_funcs_count,
	.get_function_name	= max77620_pinctrl_get_func_name,
	.get_function_groups	= max77620_pinctrl_get_func_groups,
	.set_mux		= max77620_pinctrl_enable,
};

static int max77620_pinconf_get(struct pinctrl_dev *pctldev,
				unsigned int pin, unsigned long *config)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
	struct device *dev = mpci->dev;
	enum pin_config_param param = pinconf_to_config_param(*config);
	unsigned int val;
	int arg = 0;
	int ret;

	switch (param) {
	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
		if (mpci->pin_info[pin].drv_type == MAX77620_PIN_OD_DRV)
			arg = 1;
		break;

	case PIN_CONFIG_DRIVE_PUSH_PULL:
		if (mpci->pin_info[pin].drv_type == MAX77620_PIN_PP_DRV)
			arg = 1;
		break;

	case PIN_CONFIG_BIAS_PULL_UP:
		ret = regmap_read(mpci->rmap, MAX77620_REG_PUE_GPIO, &val);
		if (ret < 0) {
			dev_err(dev, "Reg PUE_GPIO read failed: %d\n", ret);
			return ret;
		}
		if (val & BIT(pin))
			arg = 1;
		break;

	case PIN_CONFIG_BIAS_PULL_DOWN:
		ret = regmap_read(mpci->rmap, MAX77620_REG_PDE_GPIO, &val);
		if (ret < 0) {
			dev_err(dev, "Reg PDE_GPIO read failed: %d\n", ret);
			return ret;
		}
		if (val & BIT(pin))
			arg = 1;
		break;

	default:
		dev_err(dev, "Properties not supported\n");
		return -ENOTSUPP;
	}

	*config = pinconf_to_config_packed(param, (u16)arg);

	return 0;
}

static int max77620_get_default_fps(struct max77620_pctrl_info *mpci,
				    int addr, int *fps)
{
	unsigned int val;
	int ret;

	ret = regmap_read(mpci->rmap, addr, &val);
	if (ret < 0) {
		dev_err(mpci->dev, "Reg PUE_GPIO read failed: %d\n", ret);
		return ret;
	}
	*fps = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;

	return 0;
}

static int max77620_set_fps_param(struct max77620_pctrl_info *mpci,
				  int pin, int param)
{
	struct max77620_fps_config *fps_config = &mpci->fps_config[pin];
	int addr, ret;
	int param_val;
	int mask, shift;

	if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
		return 0;

	addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
	switch (param) {
	case MAX77620_ACTIVE_FPS_SOURCE:
	case MAX77620_SUSPEND_FPS_SOURCE:
		mask = MAX77620_FPS_SRC_MASK;
		shift = MAX77620_FPS_SRC_SHIFT;
		param_val = fps_config->active_fps_src;
		if (param == MAX77620_SUSPEND_FPS_SOURCE)
			param_val = fps_config->suspend_fps_src;
		break;

	case MAX77620_ACTIVE_FPS_POWER_ON_SLOTS:
	case MAX77620_SUSPEND_FPS_POWER_ON_SLOTS:
		mask = MAX77620_FPS_PU_PERIOD_MASK;
		shift = MAX77620_FPS_PU_PERIOD_SHIFT;
		param_val = fps_config->active_power_up_slots;
		if (param == MAX77620_SUSPEND_FPS_POWER_ON_SLOTS)
			param_val = fps_config->suspend_power_up_slots;
		break;

	case MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS:
	case MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS:
		mask = MAX77620_FPS_PD_PERIOD_MASK;
		shift = MAX77620_FPS_PD_PERIOD_SHIFT;
		param_val = fps_config->active_power_down_slots;
		if (param == MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS)
			param_val = fps_config->suspend_power_down_slots;
		break;

	default:
		dev_err(mpci->dev, "Invalid parameter %d for pin %d\n",
			param, pin);
		return -EINVAL;
	}

	if (param_val < 0)
		return 0;

	ret = regmap_update_bits(mpci->rmap, addr, mask, param_val << shift);
	if (ret < 0)
		dev_err(mpci->dev, "Reg 0x%02x update failed %d\n", addr, ret);

	return ret;
}

static int max77620_pinconf_set(struct pinctrl_dev *pctldev,
				unsigned int pin, unsigned long *configs,
				unsigned int num_configs)
{
	struct max77620_pctrl_info *mpci = pinctrl_dev_get_drvdata(pctldev);
	struct device *dev = mpci->dev;
	struct max77620_fps_config *fps_config;
	int param;
	u32 param_val;
	unsigned int val;
	unsigned int pu_val;
	unsigned int pd_val;
	int addr, ret;
	int i;

	for (i = 0; i < num_configs; i++) {
		param = pinconf_to_config_param(configs[i]);
		param_val = pinconf_to_config_argument(configs[i]);

		switch (param) {
		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
			val = param_val ? 0 : 1;
			ret = regmap_update_bits(mpci->rmap,
						 MAX77620_REG_GPIO0 + pin,
						 MAX77620_CNFG_GPIO_DRV_MASK,
						 val);
			if (ret)
				goto report_update_failure;

			mpci->pin_info[pin].drv_type = val ?
				MAX77620_PIN_PP_DRV : MAX77620_PIN_OD_DRV;
			break;

		case PIN_CONFIG_DRIVE_PUSH_PULL:
			val = param_val ? 1 : 0;
			ret = regmap_update_bits(mpci->rmap,
						 MAX77620_REG_GPIO0 + pin,
						 MAX77620_CNFG_GPIO_DRV_MASK,
						 val);
			if (ret)
				goto report_update_failure;

			mpci->pin_info[pin].drv_type = val ?
				MAX77620_PIN_PP_DRV : MAX77620_PIN_OD_DRV;
			break;

		case MAX77620_ACTIVE_FPS_SOURCE:
		case MAX77620_ACTIVE_FPS_POWER_ON_SLOTS:
		case MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS:
			if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
				return -EINVAL;

			fps_config = &mpci->fps_config[pin];

			if ((param == MAX77620_ACTIVE_FPS_SOURCE) &&
			    (param_val == MAX77620_FPS_SRC_DEF)) {
				addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
				ret = max77620_get_default_fps(
						mpci, addr,
						&fps_config->active_fps_src);
				if (ret < 0)
					return ret;
				break;
			}

			if (param == MAX77620_ACTIVE_FPS_SOURCE)
				fps_config->active_fps_src = param_val;
			else if (param == MAX77620_ACTIVE_FPS_POWER_ON_SLOTS)
				fps_config->active_power_up_slots = param_val;
			else
				fps_config->active_power_down_slots = param_val;

			ret = max77620_set_fps_param(mpci, pin, param);
			if (ret < 0)
				return ret;
			break;

		case MAX77620_SUSPEND_FPS_SOURCE:
		case MAX77620_SUSPEND_FPS_POWER_ON_SLOTS:
		case MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS:
			if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
				return -EINVAL;

			fps_config = &mpci->fps_config[pin];

			if ((param == MAX77620_SUSPEND_FPS_SOURCE) &&
			    (param_val == MAX77620_FPS_SRC_DEF)) {
				addr = MAX77620_REG_FPS_GPIO1 + pin - 1;
				ret = max77620_get_default_fps(
						mpci, addr,
						&fps_config->suspend_fps_src);
				if (ret < 0)
					return ret;
				break;
			}

			if (param == MAX77620_SUSPEND_FPS_SOURCE)
				fps_config->suspend_fps_src = param_val;
			else if (param == MAX77620_SUSPEND_FPS_POWER_ON_SLOTS)
				fps_config->suspend_power_up_slots = param_val;
			else
				fps_config->suspend_power_down_slots =
								param_val;
			break;

		case PIN_CONFIG_BIAS_PULL_UP:
		case PIN_CONFIG_BIAS_PULL_DOWN:
			pu_val = (param == PIN_CONFIG_BIAS_PULL_UP) ?
							BIT(pin) : 0;
			pd_val = (param == PIN_CONFIG_BIAS_PULL_DOWN) ?
							BIT(pin) : 0;

			ret = regmap_update_bits(mpci->rmap,
						 MAX77620_REG_PUE_GPIO,
						 BIT(pin), pu_val);
			if (ret < 0) {
				dev_err(dev, "PUE_GPIO update failed: %d\n",
					ret);
				return ret;
			}

			ret = regmap_update_bits(mpci->rmap,
						 MAX77620_REG_PDE_GPIO,
						 BIT(pin), pd_val);
			if (ret < 0) {
				dev_err(dev, "PDE_GPIO update failed: %d\n",
					ret);
				return ret;
			}
			break;

		default:
			dev_err(dev, "Properties not supported\n");
			return -ENOTSUPP;
		}
	}

	return 0;

report_update_failure:
	dev_err(dev, "Reg 0x%02x update failed %d\n",
		MAX77620_REG_GPIO0 + pin, ret);
	return ret;
}

static const struct pinconf_ops max77620_pinconf_ops = {
	.pin_config_get = max77620_pinconf_get,
	.pin_config_set = max77620_pinconf_set,
};

static struct pinctrl_desc max77620_pinctrl_desc = {
	.pctlops = &max77620_pinctrl_ops,
	.pmxops = &max77620_pinmux_ops,
	.confops = &max77620_pinconf_ops,
};

static int max77620_pinctrl_probe(struct platform_device *pdev)
{
	struct max77620_chip *max77620 = dev_get_drvdata(pdev->dev.parent);
	struct max77620_pctrl_info *mpci;
	int i;

	mpci = devm_kzalloc(&pdev->dev, sizeof(*mpci), GFP_KERNEL);
	if (!mpci)
		return -ENOMEM;

	mpci->dev = &pdev->dev;
	mpci->dev->of_node = pdev->dev.parent->of_node;
	mpci->rmap = max77620->rmap;

	mpci->pins = max77620_pins_desc;
	mpci->num_pins = ARRAY_SIZE(max77620_pins_desc);
	mpci->functions = max77620_pin_function;
	mpci->num_functions = ARRAY_SIZE(max77620_pin_function);
	mpci->pin_groups = max77620_pingroups;
	mpci->num_pin_groups = ARRAY_SIZE(max77620_pingroups);
	platform_set_drvdata(pdev, mpci);

	max77620_pinctrl_desc.name = dev_name(&pdev->dev);
	max77620_pinctrl_desc.pins = max77620_pins_desc;
	max77620_pinctrl_desc.npins = ARRAY_SIZE(max77620_pins_desc);
	max77620_pinctrl_desc.num_custom_params =
				ARRAY_SIZE(max77620_cfg_params);
	max77620_pinctrl_desc.custom_params = max77620_cfg_params;

	for (i = 0; i < MAX77620_PIN_NUM; ++i) {
		mpci->fps_config[i].active_fps_src = -1;
		mpci->fps_config[i].active_power_up_slots = -1;
		mpci->fps_config[i].active_power_down_slots = -1;
		mpci->fps_config[i].suspend_fps_src = -1;
		mpci->fps_config[i].suspend_power_up_slots = -1;
		mpci->fps_config[i].suspend_power_down_slots = -1;
	}

	mpci->pctl = devm_pinctrl_register(&pdev->dev, &max77620_pinctrl_desc,
					   mpci);
	if (IS_ERR(mpci->pctl)) {
		dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
		return PTR_ERR(mpci->pctl);
	}

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int max77620_suspend_fps_param[] = {
	MAX77620_SUSPEND_FPS_SOURCE,
	MAX77620_SUSPEND_FPS_POWER_ON_SLOTS,
	MAX77620_SUSPEND_FPS_POWER_DOWN_SLOTS,
};

static int max77620_active_fps_param[] = {
	MAX77620_ACTIVE_FPS_SOURCE,
	MAX77620_ACTIVE_FPS_POWER_ON_SLOTS,
	MAX77620_ACTIVE_FPS_POWER_DOWN_SLOTS,
};

static int max77620_pinctrl_suspend(struct device *dev)
{
	struct max77620_pctrl_info *mpci = dev_get_drvdata(dev);
	int pin, p;

	for (pin = 0; pin < MAX77620_PIN_NUM; ++pin) {
		if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
			continue;
		for (p = 0; p < 3; ++p)
			max77620_set_fps_param(
				mpci, pin, max77620_suspend_fps_param[p]);
	}

	return 0;
};

static int max77620_pinctrl_resume(struct device *dev)
{
	struct max77620_pctrl_info *mpci = dev_get_drvdata(dev);
	int pin, p;

	for (pin = 0; pin < MAX77620_PIN_NUM; ++pin) {
		if ((pin < MAX77620_GPIO1) || (pin > MAX77620_GPIO3))
			continue;
		for (p = 0; p < 3; ++p)
			max77620_set_fps_param(
				mpci, pin, max77620_active_fps_param[p]);
	}

	return 0;
}
#endif

static const struct dev_pm_ops max77620_pinctrl_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(
		max77620_pinctrl_suspend, max77620_pinctrl_resume)
};

static const struct platform_device_id max77620_pinctrl_devtype[] = {
	{ .name = "max77620-pinctrl", },
	{ .name = "max20024-pinctrl", },
	{},
};
MODULE_DEVICE_TABLE(platform, max77620_pinctrl_devtype);

static struct platform_driver max77620_pinctrl_driver = {
	.driver = {
		.name = "max77620-pinctrl",
		.pm = &max77620_pinctrl_pm_ops,
	},
	.probe = max77620_pinctrl_probe,
	.id_table = max77620_pinctrl_devtype,
};

module_platform_driver(max77620_pinctrl_driver);

MODULE_DESCRIPTION("MAX77620/MAX20024 pin control driver");
MODULE_AUTHOR("Chaitanya Bandi<bandik@nvidia.com>");
MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
MODULE_ALIAS("platform:max77620-pinctrl");
MODULE_LICENSE("GPL v2");