summaryrefslogtreecommitdiff
path: root/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
blob: e9f01de51e182e41a3fbfb9e4d4f565d0c131fdd (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
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
/*
 * Copyright (c) 2015, Sony Mobile Communications AB.
 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>

#include <dt-bindings/pinctrl/qcom,pmic-mpp.h>

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

/* MPP registers */
#define SSBI_REG_ADDR_MPP_BASE		0x50
#define SSBI_REG_ADDR_MPP(n)		(SSBI_REG_ADDR_MPP_BASE + n)

/* MPP Type: type */
#define PM8XXX_MPP_TYPE_D_INPUT         0
#define PM8XXX_MPP_TYPE_D_OUTPUT        1
#define PM8XXX_MPP_TYPE_D_BI_DIR        2
#define PM8XXX_MPP_TYPE_A_INPUT         3
#define PM8XXX_MPP_TYPE_A_OUTPUT        4
#define PM8XXX_MPP_TYPE_SINK            5
#define PM8XXX_MPP_TYPE_DTEST_SINK      6
#define PM8XXX_MPP_TYPE_DTEST_OUTPUT    7

/* Digital Input: control */
#define PM8XXX_MPP_DIN_TO_INT           0
#define PM8XXX_MPP_DIN_TO_DBUS1         1
#define PM8XXX_MPP_DIN_TO_DBUS2         2
#define PM8XXX_MPP_DIN_TO_DBUS3         3

/* Digital Output: control */
#define PM8XXX_MPP_DOUT_CTRL_LOW        0
#define PM8XXX_MPP_DOUT_CTRL_HIGH       1
#define PM8XXX_MPP_DOUT_CTRL_MPP        2
#define PM8XXX_MPP_DOUT_CTRL_INV_MPP    3

/* Bidirectional: control */
#define PM8XXX_MPP_BI_PULLUP_1KOHM      0
#define PM8XXX_MPP_BI_PULLUP_OPEN       1
#define PM8XXX_MPP_BI_PULLUP_10KOHM     2
#define PM8XXX_MPP_BI_PULLUP_30KOHM     3

/* Analog Output: control */
#define PM8XXX_MPP_AOUT_CTRL_DISABLE            0
#define PM8XXX_MPP_AOUT_CTRL_ENABLE             1
#define PM8XXX_MPP_AOUT_CTRL_MPP_HIGH_EN        2
#define PM8XXX_MPP_AOUT_CTRL_MPP_LOW_EN         3

/* Current Sink: control */
#define PM8XXX_MPP_CS_CTRL_DISABLE      0
#define PM8XXX_MPP_CS_CTRL_ENABLE       1
#define PM8XXX_MPP_CS_CTRL_MPP_HIGH_EN  2
#define PM8XXX_MPP_CS_CTRL_MPP_LOW_EN   3

/* DTEST Current Sink: control */
#define PM8XXX_MPP_DTEST_CS_CTRL_EN1    0
#define PM8XXX_MPP_DTEST_CS_CTRL_EN2    1
#define PM8XXX_MPP_DTEST_CS_CTRL_EN3    2
#define PM8XXX_MPP_DTEST_CS_CTRL_EN4    3

/* DTEST Digital Output: control */
#define PM8XXX_MPP_DTEST_DBUS1          0
#define PM8XXX_MPP_DTEST_DBUS2          1
#define PM8XXX_MPP_DTEST_DBUS3          2
#define PM8XXX_MPP_DTEST_DBUS4          3

/* custom pinconf parameters */
#define PM8XXX_CONFIG_AMUX		(PIN_CONFIG_END + 1)
#define PM8XXX_CONFIG_DTEST_SELECTOR	(PIN_CONFIG_END + 2)
#define PM8XXX_CONFIG_ALEVEL		(PIN_CONFIG_END + 3)
#define PM8XXX_CONFIG_PAIRED		(PIN_CONFIG_END + 4)

/**
 * struct pm8xxx_pin_data - dynamic configuration for a pin
 * @reg:		address of the control register
 * @irq:		IRQ from the PMIC interrupt controller
 * @mode:		operating mode for the pin (digital, analog or current sink)
 * @input:		pin is input
 * @output:		pin is output
 * @high_z:		pin is floating
 * @paired:		mpp operates in paired mode
 * @output_value:	logical output value of the mpp
 * @power_source:	selected power source
 * @dtest:		DTEST route selector
 * @amux:		input muxing in analog mode
 * @aout_level:		selector of the output in analog mode
 * @drive_strength:	drive strength of the current sink
 * @pullup:		pull up value, when in digital bidirectional mode
 */
struct pm8xxx_pin_data {
	unsigned reg;
	int irq;

	u8 mode;

	bool input;
	bool output;
	bool high_z;
	bool paired;
	bool output_value;

	u8 power_source;
	u8 dtest;
	u8 amux;
	u8 aout_level;
	u8 drive_strength;
	unsigned pullup;
};

struct pm8xxx_mpp {
	struct device *dev;
	struct regmap *regmap;
	struct pinctrl_dev *pctrl;
	struct gpio_chip chip;

	struct pinctrl_desc desc;
	unsigned npins;
};

static const struct pinconf_generic_params pm8xxx_mpp_bindings[] = {
	{"qcom,amux-route",	PM8XXX_CONFIG_AMUX,		0},
	{"qcom,analog-level",	PM8XXX_CONFIG_ALEVEL,		0},
	{"qcom,dtest",		PM8XXX_CONFIG_DTEST_SELECTOR,	0},
	{"qcom,paired",		PM8XXX_CONFIG_PAIRED,		0},
};

#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item pm8xxx_conf_items[] = {
	PCONFDUMP(PM8XXX_CONFIG_AMUX, "analog mux", NULL, true),
	PCONFDUMP(PM8XXX_CONFIG_ALEVEL, "analog level", NULL, true),
	PCONFDUMP(PM8XXX_CONFIG_DTEST_SELECTOR, "dtest", NULL, true),
	PCONFDUMP(PM8XXX_CONFIG_PAIRED, "paired", NULL, false),
};
#endif

#define PM8XXX_MAX_MPPS	12
static const char * const pm8xxx_groups[PM8XXX_MAX_MPPS] = {
	"mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
	"mpp9", "mpp10", "mpp11", "mpp12",
};

#define PM8XXX_MPP_DIGITAL	0
#define PM8XXX_MPP_ANALOG	1
#define PM8XXX_MPP_SINK		2

static const char * const pm8xxx_mpp_functions[] = {
	"digital", "analog", "sink",
};

static int pm8xxx_mpp_update(struct pm8xxx_mpp *pctrl,
			     struct pm8xxx_pin_data *pin)
{
	unsigned level;
	unsigned ctrl;
	unsigned type;
	int ret;
	u8 val;

	switch (pin->mode) {
	case PM8XXX_MPP_DIGITAL:
		if (pin->dtest) {
			type = PM8XXX_MPP_TYPE_DTEST_OUTPUT;
			ctrl = pin->dtest - 1;
		} else if (pin->input && pin->output) {
			type = PM8XXX_MPP_TYPE_D_BI_DIR;
			if (pin->high_z)
				ctrl = PM8XXX_MPP_BI_PULLUP_OPEN;
			else if (pin->pullup == 600)
				ctrl = PM8XXX_MPP_BI_PULLUP_1KOHM;
			else if (pin->pullup == 10000)
				ctrl = PM8XXX_MPP_BI_PULLUP_10KOHM;
			else
				ctrl = PM8XXX_MPP_BI_PULLUP_30KOHM;
		} else if (pin->input) {
			type = PM8XXX_MPP_TYPE_D_INPUT;
			if (pin->dtest)
				ctrl = pin->dtest;
			else
				ctrl = PM8XXX_MPP_DIN_TO_INT;
		} else {
			type = PM8XXX_MPP_TYPE_D_OUTPUT;
			ctrl = !!pin->output_value;
			if (pin->paired)
				ctrl |= BIT(1);
		}

		level = pin->power_source;
		break;
	case PM8XXX_MPP_ANALOG:
		if (pin->output) {
			type = PM8XXX_MPP_TYPE_A_OUTPUT;
			level = pin->aout_level;
			ctrl = pin->output_value;
			if (pin->paired)
				ctrl |= BIT(1);
		} else {
			type = PM8XXX_MPP_TYPE_A_INPUT;
			level = pin->amux;
			ctrl = 0;
		}
		break;
	case PM8XXX_MPP_SINK:
		level = (pin->drive_strength / 5) - 1;
		if (pin->dtest) {
			type = PM8XXX_MPP_TYPE_DTEST_SINK;
			ctrl = pin->dtest - 1;
		} else {
			type = PM8XXX_MPP_TYPE_SINK;
			ctrl = pin->output_value;
			if (pin->paired)
				ctrl |= BIT(1);
		}
		break;
	default:
		return -EINVAL;
	}

	val = type << 5 | level << 2 | ctrl;
	ret = regmap_write(pctrl->regmap, pin->reg, val);
	if (ret)
		dev_err(pctrl->dev, "failed to write register\n");

	return ret;
}

static int pm8xxx_get_groups_count(struct pinctrl_dev *pctldev)
{
	struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);

	return pctrl->npins;
}

static const char *pm8xxx_get_group_name(struct pinctrl_dev *pctldev,
					 unsigned group)
{
	return pm8xxx_groups[group];
}


static int pm8xxx_get_group_pins(struct pinctrl_dev *pctldev,
				 unsigned group,
				 const unsigned **pins,
				 unsigned *num_pins)
{
	struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);

	*pins = &pctrl->desc.pins[group].number;
	*num_pins = 1;

	return 0;
}

static const struct pinctrl_ops pm8xxx_pinctrl_ops = {
	.get_groups_count	= pm8xxx_get_groups_count,
	.get_group_name		= pm8xxx_get_group_name,
	.get_group_pins         = pm8xxx_get_group_pins,
	.dt_node_to_map		= pinconf_generic_dt_node_to_map_group,
	.dt_free_map		= pinctrl_utils_dt_free_map,
};

static int pm8xxx_get_functions_count(struct pinctrl_dev *pctldev)
{
	return ARRAY_SIZE(pm8xxx_mpp_functions);
}

static const char *pm8xxx_get_function_name(struct pinctrl_dev *pctldev,
					    unsigned function)
{
	return pm8xxx_mpp_functions[function];
}

static int pm8xxx_get_function_groups(struct pinctrl_dev *pctldev,
				      unsigned function,
				      const char * const **groups,
				      unsigned * const num_groups)
{
	struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);

	*groups = pm8xxx_groups;
	*num_groups = pctrl->npins;
	return 0;
}

static int pm8xxx_pinmux_set_mux(struct pinctrl_dev *pctldev,
				 unsigned function,
				 unsigned group)
{
	struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[group].drv_data;

	pin->mode = function;
	pm8xxx_mpp_update(pctrl, pin);

	return 0;
}

static const struct pinmux_ops pm8xxx_pinmux_ops = {
	.get_functions_count	= pm8xxx_get_functions_count,
	.get_function_name	= pm8xxx_get_function_name,
	.get_function_groups	= pm8xxx_get_function_groups,
	.set_mux		= pm8xxx_pinmux_set_mux,
};

static int pm8xxx_pin_config_get(struct pinctrl_dev *pctldev,
				 unsigned int offset,
				 unsigned long *config)
{
	struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
	unsigned param = pinconf_to_config_param(*config);
	unsigned arg;

	switch (param) {
	case PIN_CONFIG_BIAS_PULL_UP:
		arg = pin->pullup;
		break;
	case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
		arg = pin->high_z;
		break;
	case PIN_CONFIG_INPUT_ENABLE:
		arg = pin->input;
		break;
	case PIN_CONFIG_OUTPUT:
		arg = pin->output_value;
		break;
	case PIN_CONFIG_POWER_SOURCE:
		arg = pin->power_source;
		break;
	case PIN_CONFIG_DRIVE_STRENGTH:
		arg = pin->drive_strength;
		break;
	case PM8XXX_CONFIG_DTEST_SELECTOR:
		arg = pin->dtest;
		break;
	case PM8XXX_CONFIG_AMUX:
		arg = pin->amux;
		break;
	case PM8XXX_CONFIG_ALEVEL:
		arg = pin->aout_level;
		break;
	case PM8XXX_CONFIG_PAIRED:
		arg = pin->paired;
		break;
	default:
		return -EINVAL;
	}

	*config = pinconf_to_config_packed(param, arg);

	return 0;
}

static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev,
				 unsigned int offset,
				 unsigned long *configs,
				 unsigned num_configs)
{
	struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
	unsigned param;
	unsigned arg;
	unsigned i;

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

		switch (param) {
		case PIN_CONFIG_BIAS_PULL_UP:
			pin->pullup = arg;
			break;
		case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
			pin->high_z = true;
			break;
		case PIN_CONFIG_INPUT_ENABLE:
			pin->input = true;
			break;
		case PIN_CONFIG_OUTPUT:
			pin->output = true;
			pin->output_value = !!arg;
			break;
		case PIN_CONFIG_POWER_SOURCE:
			pin->power_source = arg;
			break;
		case PIN_CONFIG_DRIVE_STRENGTH:
			pin->drive_strength = arg;
			break;
		case PM8XXX_CONFIG_DTEST_SELECTOR:
			pin->dtest = arg;
			break;
		case PM8XXX_CONFIG_AMUX:
			pin->amux = arg;
			break;
		case PM8XXX_CONFIG_ALEVEL:
			pin->aout_level = arg;
			break;
		case PM8XXX_CONFIG_PAIRED:
			pin->paired = !!arg;
			break;
		default:
			dev_err(pctrl->dev,
				"unsupported config parameter: %x\n",
				param);
			return -EINVAL;
		}
	}

	pm8xxx_mpp_update(pctrl, pin);

	return 0;
}

static const struct pinconf_ops pm8xxx_pinconf_ops = {
	.is_generic = true,
	.pin_config_group_get = pm8xxx_pin_config_get,
	.pin_config_group_set = pm8xxx_pin_config_set,
};

static struct pinctrl_desc pm8xxx_pinctrl_desc = {
	.name = "pm8xxx_mpp",
	.pctlops = &pm8xxx_pinctrl_ops,
	.pmxops = &pm8xxx_pinmux_ops,
	.confops = &pm8xxx_pinconf_ops,
	.owner = THIS_MODULE,
};

static int pm8xxx_mpp_direction_input(struct gpio_chip *chip,
				       unsigned offset)
{
	struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;

	switch (pin->mode) {
	case PM8XXX_MPP_DIGITAL:
		pin->input = true;
		break;
	case PM8XXX_MPP_ANALOG:
		pin->input = true;
		pin->output = true;
		break;
	case PM8XXX_MPP_SINK:
		return -EINVAL;
	}

	pm8xxx_mpp_update(pctrl, pin);

	return 0;
}

static int pm8xxx_mpp_direction_output(struct gpio_chip *chip,
					unsigned offset,
					int value)
{
	struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;

	switch (pin->mode) {
	case PM8XXX_MPP_DIGITAL:
		pin->output = true;
		break;
	case PM8XXX_MPP_ANALOG:
		pin->input = false;
		pin->output = true;
		break;
	case PM8XXX_MPP_SINK:
		pin->input = false;
		pin->output = true;
		break;
	}

	pm8xxx_mpp_update(pctrl, pin);

	return 0;
}

static int pm8xxx_mpp_get(struct gpio_chip *chip, unsigned offset)
{
	struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
	bool state;
	int ret;

	if (!pin->input)
		return pin->output_value;

	ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state);
	if (!ret)
		ret = !!state;

	return ret;
}

static void pm8xxx_mpp_set(struct gpio_chip *chip, unsigned offset, int value)
{
	struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;

	pin->output_value = !!value;

	pm8xxx_mpp_update(pctrl, pin);
}

static int pm8xxx_mpp_of_xlate(struct gpio_chip *chip,
				const struct of_phandle_args *gpio_desc,
				u32 *flags)
{
	if (chip->of_gpio_n_cells < 2)
		return -EINVAL;

	if (flags)
		*flags = gpio_desc->args[1];

	return gpio_desc->args[0] - 1;
}


static int pm8xxx_mpp_to_irq(struct gpio_chip *chip, unsigned offset)
{
	struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;

	return pin->irq;
}

#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>

static void pm8xxx_mpp_dbg_show_one(struct seq_file *s,
				  struct pinctrl_dev *pctldev,
				  struct gpio_chip *chip,
				  unsigned offset,
				  unsigned gpio)
{
	struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;

	static const char * const aout_lvls[] = {
		"1v25", "1v25_2", "0v625", "0v3125", "mpp", "abus1", "abus2",
		"abus3"
	};

	static const char * const amuxs[] = {
		"amux5", "amux6", "amux7", "amux8", "amux9", "abus1", "abus2",
		"abus3",
	};

	seq_printf(s, " mpp%-2d:", offset + 1);

	switch (pin->mode) {
	case PM8XXX_MPP_DIGITAL:
		seq_puts(s, " digital ");
		if (pin->dtest) {
			seq_printf(s, "dtest%d\n", pin->dtest);
		} else if (pin->input && pin->output) {
			if (pin->high_z)
				seq_puts(s, "bi-dir high-z");
			else
				seq_printf(s, "bi-dir %dOhm", pin->pullup);
		} else if (pin->input) {
			if (pin->dtest)
				seq_printf(s, "in dtest%d", pin->dtest);
			else
				seq_puts(s, "in gpio");
		} else if (pin->output) {
			seq_puts(s, "out ");

			if (!pin->paired) {
				seq_puts(s, pin->output_value ?
					 "high" : "low");
			} else {
				seq_puts(s, pin->output_value ?
					 "inverted" : "follow");
			}
		}
		break;
	case PM8XXX_MPP_ANALOG:
		seq_puts(s, " analog ");
		if (pin->output) {
			seq_printf(s, "out %s ", aout_lvls[pin->aout_level]);
			if (!pin->paired) {
				seq_puts(s, pin->output_value ?
					 "high" : "low");
			} else {
				seq_puts(s, pin->output_value ?
					 "inverted" : "follow");
			}
		} else {
			seq_printf(s, "input mux %s", amuxs[pin->amux]);
		}
		break;
	case PM8XXX_MPP_SINK:
		seq_printf(s, " sink %dmA ", pin->drive_strength);
		if (pin->dtest) {
			seq_printf(s, "dtest%d", pin->dtest);
		} else {
			if (!pin->paired) {
				seq_puts(s, pin->output_value ?
					 "high" : "low");
			} else {
				seq_puts(s, pin->output_value ?
					 "inverted" : "follow");
			}
		}
		break;
	}

}

static void pm8xxx_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
	unsigned gpio = chip->base;
	unsigned i;

	for (i = 0; i < chip->ngpio; i++, gpio++) {
		pm8xxx_mpp_dbg_show_one(s, NULL, chip, i, gpio);
		seq_puts(s, "\n");
	}
}

#else
#define pm8xxx_mpp_dbg_show NULL
#endif

static struct gpio_chip pm8xxx_mpp_template = {
	.direction_input = pm8xxx_mpp_direction_input,
	.direction_output = pm8xxx_mpp_direction_output,
	.get = pm8xxx_mpp_get,
	.set = pm8xxx_mpp_set,
	.of_xlate = pm8xxx_mpp_of_xlate,
	.to_irq = pm8xxx_mpp_to_irq,
	.dbg_show = pm8xxx_mpp_dbg_show,
	.owner = THIS_MODULE,
};

static int pm8xxx_pin_populate(struct pm8xxx_mpp *pctrl,
			       struct pm8xxx_pin_data *pin)
{
	unsigned int val;
	unsigned level;
	unsigned ctrl;
	unsigned type;
	int ret;

	ret = regmap_read(pctrl->regmap, pin->reg, &val);
	if (ret) {
		dev_err(pctrl->dev, "failed to read register\n");
		return ret;
	}

	type = (val >> 5) & 7;
	level = (val >> 2) & 7;
	ctrl = (val) & 3;

	switch (type) {
	case PM8XXX_MPP_TYPE_D_INPUT:
		pin->mode = PM8XXX_MPP_DIGITAL;
		pin->input = true;
		pin->power_source = level;
		pin->dtest = ctrl;
		break;
	case PM8XXX_MPP_TYPE_D_OUTPUT:
		pin->mode = PM8XXX_MPP_DIGITAL;
		pin->output = true;
		pin->power_source = level;
		pin->output_value = !!(ctrl & BIT(0));
		pin->paired = !!(ctrl & BIT(1));
		break;
	case PM8XXX_MPP_TYPE_D_BI_DIR:
		pin->mode = PM8XXX_MPP_DIGITAL;
		pin->input = true;
		pin->output = true;
		pin->power_source = level;
		switch (ctrl) {
		case PM8XXX_MPP_BI_PULLUP_1KOHM:
			pin->pullup = 600;
			break;
		case PM8XXX_MPP_BI_PULLUP_OPEN:
			pin->high_z = true;
			break;
		case PM8XXX_MPP_BI_PULLUP_10KOHM:
			pin->pullup = 10000;
			break;
		case PM8XXX_MPP_BI_PULLUP_30KOHM:
			pin->pullup = 30000;
			break;
		}
		break;
	case PM8XXX_MPP_TYPE_A_INPUT:
		pin->mode = PM8XXX_MPP_ANALOG;
		pin->input = true;
		pin->amux = level;
		break;
	case PM8XXX_MPP_TYPE_A_OUTPUT:
		pin->mode = PM8XXX_MPP_ANALOG;
		pin->output = true;
		pin->aout_level = level;
		pin->output_value = !!(ctrl & BIT(0));
		pin->paired = !!(ctrl & BIT(1));
		break;
	case PM8XXX_MPP_TYPE_SINK:
		pin->mode = PM8XXX_MPP_SINK;
		pin->drive_strength = 5 * (level + 1);
		pin->output_value = !!(ctrl & BIT(0));
		pin->paired = !!(ctrl & BIT(1));
		break;
	case PM8XXX_MPP_TYPE_DTEST_SINK:
		pin->mode = PM8XXX_MPP_SINK;
		pin->dtest = ctrl + 1;
		pin->drive_strength = 5 * (level + 1);
		break;
	case PM8XXX_MPP_TYPE_DTEST_OUTPUT:
		pin->mode = PM8XXX_MPP_DIGITAL;
		pin->power_source = level;
		if (ctrl >= 1)
			pin->dtest = ctrl;
		break;
	}

	return 0;
}

static const struct of_device_id pm8xxx_mpp_of_match[] = {
	{ .compatible = "qcom,pm8018-mpp" },
	{ .compatible = "qcom,pm8038-mpp" },
	{ .compatible = "qcom,pm8917-mpp" },
	{ .compatible = "qcom,pm8821-mpp" },
	{ .compatible = "qcom,pm8921-mpp" },
	{ .compatible = "qcom,ssbi-mpp" },
	{ },
};
MODULE_DEVICE_TABLE(of, pm8xxx_mpp_of_match);

static int pm8xxx_mpp_probe(struct platform_device *pdev)
{
	struct pm8xxx_pin_data *pin_data;
	struct pinctrl_pin_desc *pins;
	struct pm8xxx_mpp *pctrl;
	int ret;
	int i, npins;

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

	pctrl->dev = &pdev->dev;
	npins = platform_irq_count(pdev);
	if (!npins)
		return -EINVAL;
	if (npins < 0)
		return npins;
	pctrl->npins = npins;

	pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!pctrl->regmap) {
		dev_err(&pdev->dev, "parent regmap unavailable\n");
		return -ENXIO;
	}

	pctrl->desc = pm8xxx_pinctrl_desc;
	pctrl->desc.npins = pctrl->npins;

	pins = devm_kcalloc(&pdev->dev,
			    pctrl->desc.npins,
			    sizeof(struct pinctrl_pin_desc),
			    GFP_KERNEL);
	if (!pins)
		return -ENOMEM;

	pin_data = devm_kcalloc(&pdev->dev,
				pctrl->desc.npins,
				sizeof(struct pm8xxx_pin_data),
				GFP_KERNEL);
	if (!pin_data)
		return -ENOMEM;

	for (i = 0; i < pctrl->desc.npins; i++) {
		pin_data[i].reg = SSBI_REG_ADDR_MPP(i);
		pin_data[i].irq = platform_get_irq(pdev, i);
		if (pin_data[i].irq < 0) {
			dev_err(&pdev->dev,
				"missing interrupts for pin %d\n", i);
			return pin_data[i].irq;
		}

		ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
		if (ret)
			return ret;

		pins[i].number = i;
		pins[i].name = pm8xxx_groups[i];
		pins[i].drv_data = &pin_data[i];
	}
	pctrl->desc.pins = pins;

	pctrl->desc.num_custom_params = ARRAY_SIZE(pm8xxx_mpp_bindings);
	pctrl->desc.custom_params = pm8xxx_mpp_bindings;
#ifdef CONFIG_DEBUG_FS
	pctrl->desc.custom_conf_items = pm8xxx_conf_items;
#endif

	pctrl->pctrl = pinctrl_register(&pctrl->desc, &pdev->dev, pctrl);
	if (IS_ERR(pctrl->pctrl)) {
		dev_err(&pdev->dev, "couldn't register pm8xxx mpp driver\n");
		return PTR_ERR(pctrl->pctrl);
	}

	pctrl->chip = pm8xxx_mpp_template;
	pctrl->chip.base = -1;
	pctrl->chip.dev = &pdev->dev;
	pctrl->chip.of_node = pdev->dev.of_node;
	pctrl->chip.of_gpio_n_cells = 2;
	pctrl->chip.label = dev_name(pctrl->dev);
	pctrl->chip.ngpio = pctrl->npins;
	ret = gpiochip_add(&pctrl->chip);
	if (ret) {
		dev_err(&pdev->dev, "failed register gpiochip\n");
		goto unregister_pinctrl;
	}

	ret = gpiochip_add_pin_range(&pctrl->chip,
				     dev_name(pctrl->dev),
				     0, 0, pctrl->chip.ngpio);
	if (ret) {
		dev_err(pctrl->dev, "failed to add pin range\n");
		goto unregister_gpiochip;
	}

	platform_set_drvdata(pdev, pctrl);

	dev_dbg(&pdev->dev, "Qualcomm pm8xxx mpp driver probed\n");

	return 0;

unregister_gpiochip:
	gpiochip_remove(&pctrl->chip);

unregister_pinctrl:
	pinctrl_unregister(pctrl->pctrl);

	return ret;
}

static int pm8xxx_mpp_remove(struct platform_device *pdev)
{
	struct pm8xxx_mpp *pctrl = platform_get_drvdata(pdev);

	gpiochip_remove(&pctrl->chip);

	pinctrl_unregister(pctrl->pctrl);

	return 0;
}

static struct platform_driver pm8xxx_mpp_driver = {
	.driver = {
		.name = "qcom-ssbi-mpp",
		.of_match_table = pm8xxx_mpp_of_match,
	},
	.probe = pm8xxx_mpp_probe,
	.remove = pm8xxx_mpp_remove,
};

module_platform_driver(pm8xxx_mpp_driver);

MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
MODULE_DESCRIPTION("Qualcomm PM8xxx MPP driver");
MODULE_LICENSE("GPL v2");