summaryrefslogtreecommitdiff
path: root/drivers/pinctrl/bcm/pinctrl-nsp-mux.c
blob: 35c17653c694767c8e13d1a8d02d7d91718d23b3 (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
/* Copyright (C) 2015 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This file contains the Northstar plus (NSP) IOMUX driver that supports
 * group based PINMUX configuration. The Northstar plus IOMUX controller
 * allows pins to be individually muxed to GPIO function. The NAND and MMC is
 * a group based selection. The gpio_a 8 - 11 are muxed with gpio_b and pwm.
 * To select PWM, one need to enable the corresponding gpio_b as well.
 *
 *				gpio_a (8 - 11)
 *				+----------
 *				|
 *		gpio_a (8-11)	|	gpio_b (0 - 3)
 *	------------------------+-------+----------
 *					|
 *					|	pwm (0 - 3)
 *					+----------
 */

#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

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

#define NSP_MUX_BASE0	0x00
#define NSP_MUX_BASE1	0x01
#define NSP_MUX_BASE2	0x02
/*
 * nsp IOMUX register description
 *
 * @base: base 0 or base 1
 * @shift: bit shift for mux configuration of a group
 * @mask: bit mask of the function
 * @alt: alternate function to set to
 */
struct nsp_mux {
	unsigned int base;
	unsigned int shift;
	unsigned int mask;
	unsigned int alt;
};

/*
 * Keep track of nsp IOMUX configuration and prevent double configuration
 *
 * @nsp_mux: nsp IOMUX register description
 * @is_configured: flag to indicate whether a mux setting has already been
 * configured
 */
struct nsp_mux_log {
	struct nsp_mux mux;
	bool is_configured;
};

/*
 * Group based IOMUX configuration
 *
 * @name: name of the group
 * @pins: array of pins used by this group
 * @num_pins: total number of pins used by this group
 * @mux: nsp group based IOMUX configuration
 */
struct nsp_pin_group {
	const char *name;
	const unsigned int *pins;
	const unsigned int num_pins;
	const struct nsp_mux mux;
};

/*
 * nsp mux function and supported pin groups
 *
 * @name: name of the function
 * @groups: array of groups that can be supported by this function
 * @num_groups: total number of groups that can be supported by this function
 */
struct nsp_pin_function {
	const char *name;
	const char * const *groups;
	const unsigned int num_groups;
};

/*
 * nsp IOMUX pinctrl core
 *
 * @pctl: pointer to pinctrl_dev
 * @dev: pointer to device
 * @base0: first mux register
 * @base1: second mux register
 * @base2: third mux register
 * @groups: pointer to array of groups
 * @num_groups: total number of groups
 * @functions: pointer to array of functions
 * @num_functions: total number of functions
 * @mux_log: pointer to the array of mux logs
 * @lock: lock to protect register access
 */
struct nsp_pinctrl {
	struct pinctrl_dev *pctl;
	struct device *dev;
	void __iomem *base0;
	void __iomem *base1;
	void __iomem *base2;
	const struct nsp_pin_group *groups;
	unsigned int num_groups;
	const struct nsp_pin_function *functions;
	unsigned int num_functions;
	struct nsp_mux_log *mux_log;
	spinlock_t lock;
};

/*
 * Description of a pin in nsp
 *
 * @pin: pin number
 * @name: pin name
 * @gpio_select: reg data to select GPIO
 */
struct nsp_pin {
	unsigned int pin;
	char *name;
	unsigned int gpio_select;
};

#define NSP_PIN_DESC(p, n, g)		\
{					\
	.pin = p,			\
	.name = n,			\
	.gpio_select = g,		\
}

/*
 * List of muxable pins in nsp
 */
static struct nsp_pin nsp_pins[] = {
	NSP_PIN_DESC(0, "spi_clk", 1),
	NSP_PIN_DESC(1, "spi_ss", 1),
	NSP_PIN_DESC(2, "spi_mosi", 1),
	NSP_PIN_DESC(3, "spi_miso", 1),
	NSP_PIN_DESC(4, "scl", 1),
	NSP_PIN_DESC(5, "sda", 1),
	NSP_PIN_DESC(6, "mdc", 1),
	NSP_PIN_DESC(7, "mdio", 1),
	NSP_PIN_DESC(8, "pwm0", 1),
	NSP_PIN_DESC(9, "pwm1", 1),
	NSP_PIN_DESC(10, "pwm2", 1),
	NSP_PIN_DESC(11, "pwm3", 1),
	NSP_PIN_DESC(12, "uart1_rx", 1),
	NSP_PIN_DESC(13, "uart1_tx", 1),
	NSP_PIN_DESC(14, "uart1_cts", 1),
	NSP_PIN_DESC(15, "uart1_rts", 1),
	NSP_PIN_DESC(16, "uart2_rx", 1),
	NSP_PIN_DESC(17, "uart2_tx", 1),
	NSP_PIN_DESC(18, "synce", 0),
	NSP_PIN_DESC(19, "sata0_led", 0),
	NSP_PIN_DESC(20, "sata1_led", 0),
	NSP_PIN_DESC(21, "xtal_out", 1),
	NSP_PIN_DESC(22, "sdio_pwr", 1),
	NSP_PIN_DESC(23, "sdio_en_1p8v", 1),
	NSP_PIN_DESC(24, "gpio_24", 1),
	NSP_PIN_DESC(25, "gpio_25", 1),
	NSP_PIN_DESC(26, "p5_led0", 0),
	NSP_PIN_DESC(27, "p5_led1", 0),
	NSP_PIN_DESC(28, "gpio_28", 1),
	NSP_PIN_DESC(29, "gpio_29", 1),
	NSP_PIN_DESC(30, "gpio_30", 1),
	NSP_PIN_DESC(31, "gpio_31", 1),
	NSP_PIN_DESC(32, "nand_ale", 0),
	NSP_PIN_DESC(33, "nand_ce0", 0),
	NSP_PIN_DESC(34, "nand_r/b", 0),
	NSP_PIN_DESC(35, "nand_dq0", 0),
	NSP_PIN_DESC(36, "nand_dq1", 0),
	NSP_PIN_DESC(37, "nand_dq2", 0),
	NSP_PIN_DESC(38, "nand_dq3", 0),
	NSP_PIN_DESC(39, "nand_dq4", 0),
	NSP_PIN_DESC(40, "nand_dq5", 0),
	NSP_PIN_DESC(41, "nand_dq6", 0),
	NSP_PIN_DESC(42, "nand_dq7", 0),
};

/*
 * List of groups of pins
 */

static const unsigned int spi_pins[] = {0, 1, 2, 3};
static const unsigned int i2c_pins[] = {4, 5};
static const unsigned int mdio_pins[] = {6, 7};
static const unsigned int pwm0_pins[] = {8};
static const unsigned int gpio_b_0_pins[] = {8};
static const unsigned int pwm1_pins[] = {9};
static const unsigned int gpio_b_1_pins[] = {9};
static const unsigned int pwm2_pins[] = {10};
static const unsigned int gpio_b_2_pins[] = {10};
static const unsigned int pwm3_pins[] = {11};
static const unsigned int gpio_b_3_pins[] = {11};
static const unsigned int uart1_pins[] = {12, 13, 14, 15};
static const unsigned int uart2_pins[] = {16, 17};
static const unsigned int synce_pins[] = {18};
static const unsigned int sata0_led_pins[] = {19};
static const unsigned int sata1_led_pins[] = {20};
static const unsigned int xtal_out_pins[] = {21};
static const unsigned int sdio_pwr_pins[] = {22};
static const unsigned int sdio_1p8v_pins[] = {23};
static const unsigned int switch_p05_led0_pins[] = {26};
static const unsigned int switch_p05_led1_pins[] = {27};
static const unsigned int nand_pins[] = {32, 33, 34, 35, 36, 37, 38, 39,
							40, 41, 42};
static const unsigned int emmc_pins[] = {32, 33, 34, 35, 36, 37, 38, 39,
							40, 41, 42};

#define NSP_PIN_GROUP(group_name, ba, sh, ma, al)	\
{							\
	.name = __stringify(group_name) "_grp",		\
	.pins = group_name ## _pins,			\
	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
	.mux = {					\
		.base = ba,				\
		.shift = sh,				\
		.mask = ma,				\
		.alt = al,				\
	}						\
}

/*
 * List of nsp pin groups
 */
static const struct nsp_pin_group nsp_pin_groups[] = {
	NSP_PIN_GROUP(spi, NSP_MUX_BASE0, 0, 0x0f, 0x00),
	NSP_PIN_GROUP(i2c, NSP_MUX_BASE0, 3, 0x03, 0x00),
	NSP_PIN_GROUP(mdio, NSP_MUX_BASE0, 5, 0x03, 0x00),
	NSP_PIN_GROUP(gpio_b_0, NSP_MUX_BASE0, 7, 0x01, 0x00),
	NSP_PIN_GROUP(pwm0, NSP_MUX_BASE1, 0, 0x01, 0x01),
	NSP_PIN_GROUP(gpio_b_1, NSP_MUX_BASE0, 8, 0x01, 0x00),
	NSP_PIN_GROUP(pwm1, NSP_MUX_BASE1, 1, 0x01, 0x01),
	NSP_PIN_GROUP(gpio_b_2, NSP_MUX_BASE0, 9, 0x01, 0x00),
	NSP_PIN_GROUP(pwm2, NSP_MUX_BASE1, 2, 0x01, 0x01),
	NSP_PIN_GROUP(gpio_b_3, NSP_MUX_BASE0, 10, 0x01, 0x00),
	NSP_PIN_GROUP(pwm3, NSP_MUX_BASE1, 3, 0x01, 0x01),
	NSP_PIN_GROUP(uart1, NSP_MUX_BASE0, 11, 0x0f, 0x00),
	NSP_PIN_GROUP(uart2, NSP_MUX_BASE0, 15, 0x03, 0x00),
	NSP_PIN_GROUP(synce, NSP_MUX_BASE0, 17, 0x01, 0x01),
	NSP_PIN_GROUP(sata0_led, NSP_MUX_BASE0, 18, 0x01, 0x01),
	NSP_PIN_GROUP(sata1_led, NSP_MUX_BASE0, 19, 0x01, 0x01),
	NSP_PIN_GROUP(xtal_out, NSP_MUX_BASE0, 20, 0x01, 0x00),
	NSP_PIN_GROUP(sdio_pwr, NSP_MUX_BASE0, 21, 0x01, 0x00),
	NSP_PIN_GROUP(sdio_1p8v, NSP_MUX_BASE0, 22, 0x01, 0x00),
	NSP_PIN_GROUP(switch_p05_led0, NSP_MUX_BASE0, 26, 0x01, 0x01),
	NSP_PIN_GROUP(switch_p05_led1, NSP_MUX_BASE0, 27, 0x01, 0x01),
	NSP_PIN_GROUP(nand, NSP_MUX_BASE2, 0, 0x01, 0x00),
	NSP_PIN_GROUP(emmc, NSP_MUX_BASE2, 0, 0x01, 0x01)
};

/*
 * List of groups supported by functions
 */

static const char * const spi_grps[] = {"spi_grp"};
static const char * const i2c_grps[] = {"i2c_grp"};
static const char * const mdio_grps[] = {"mdio_grp"};
static const char * const pwm_grps[] = {"pwm0_grp", "pwm1_grp", "pwm2_grp"
						, "pwm3_grp"};
static const char * const gpio_b_grps[] = {"gpio_b_0_grp", "gpio_b_1_grp",
					"gpio_b_2_grp", "gpio_b_3_grp"};
static const char * const uart1_grps[] = {"uart1_grp"};
static const char * const uart2_grps[] = {"uart2_grp"};
static const char * const synce_grps[] = {"synce_grp"};
static const char * const sata_led_grps[] = {"sata0_led_grp", "sata1_led_grp"};
static const char * const xtal_out_grps[] = {"xtal_out_grp"};
static const char * const sdio_grps[] = {"sdio_pwr_grp", "sdio_1p8v_grp"};
static const char * const switch_led_grps[] = {"switch_p05_led0_grp",
						"switch_p05_led1_grp"};
static const char * const nand_grps[] = {"nand_grp"};
static const char * const emmc_grps[] = {"emmc_grp"};

#define NSP_PIN_FUNCTION(func)				\
{							\
	.name = #func,					\
	.groups = func ## _grps,			\
	.num_groups = ARRAY_SIZE(func ## _grps),	\
}

/*
 * List of supported functions in nsp
 */
static const struct nsp_pin_function nsp_pin_functions[] = {
	NSP_PIN_FUNCTION(spi),
	NSP_PIN_FUNCTION(i2c),
	NSP_PIN_FUNCTION(mdio),
	NSP_PIN_FUNCTION(pwm),
	NSP_PIN_FUNCTION(gpio_b),
	NSP_PIN_FUNCTION(uart1),
	NSP_PIN_FUNCTION(uart2),
	NSP_PIN_FUNCTION(synce),
	NSP_PIN_FUNCTION(sata_led),
	NSP_PIN_FUNCTION(xtal_out),
	NSP_PIN_FUNCTION(sdio),
	NSP_PIN_FUNCTION(switch_led),
	NSP_PIN_FUNCTION(nand),
	NSP_PIN_FUNCTION(emmc)
};

static int nsp_get_groups_count(struct pinctrl_dev *pctrl_dev)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	return pinctrl->num_groups;
}

static const char *nsp_get_group_name(struct pinctrl_dev *pctrl_dev,
				      unsigned int selector)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	return pinctrl->groups[selector].name;
}

static int nsp_get_group_pins(struct pinctrl_dev *pctrl_dev,
			      unsigned int selector, const unsigned int **pins,
			      unsigned int *num_pins)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	*pins = pinctrl->groups[selector].pins;
	*num_pins = pinctrl->groups[selector].num_pins;

	return 0;
}

static void nsp_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
			     struct seq_file *s, unsigned int offset)
{
	seq_printf(s, " %s", dev_name(pctrl_dev->dev));
}

static const struct pinctrl_ops nsp_pinctrl_ops = {
	.get_groups_count = nsp_get_groups_count,
	.get_group_name = nsp_get_group_name,
	.get_group_pins = nsp_get_group_pins,
	.pin_dbg_show = nsp_pin_dbg_show,
	.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
	.dt_free_map = pinctrl_utils_free_map,
};

static int nsp_get_functions_count(struct pinctrl_dev *pctrl_dev)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	return pinctrl->num_functions;
}

static const char *nsp_get_function_name(struct pinctrl_dev *pctrl_dev,
					 unsigned int selector)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	return pinctrl->functions[selector].name;
}

static int nsp_get_function_groups(struct pinctrl_dev *pctrl_dev,
				   unsigned int selector,
				   const char * const **groups,
				   unsigned * const num_groups)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);

	*groups = pinctrl->functions[selector].groups;
	*num_groups = pinctrl->functions[selector].num_groups;

	return 0;
}

static int nsp_pinmux_set(struct nsp_pinctrl *pinctrl,
			  const struct nsp_pin_function *func,
			  const struct nsp_pin_group *grp,
			  struct nsp_mux_log *mux_log)
{
	const struct nsp_mux *mux = &grp->mux;
	int i;
	u32 val, mask;
	unsigned long flags;
	void __iomem *base_address;

	for (i = 0; i < pinctrl->num_groups; i++) {
		if ((mux->shift != mux_log[i].mux.shift) ||
			(mux->base != mux_log[i].mux.base))
			continue;

		/* if this is a new configuration, just do it! */
		if (!mux_log[i].is_configured)
			break;

		/*
		 * IOMUX has been configured previously and one is trying to
		 * configure it to a different function
		 */
		if (mux_log[i].mux.alt != mux->alt) {
			dev_err(pinctrl->dev,
				"double configuration error detected!\n");
			dev_err(pinctrl->dev, "func:%s grp:%s\n",
				func->name, grp->name);
			return -EINVAL;
		}

		return 0;
	}
	if (i == pinctrl->num_groups)
		return -EINVAL;

	mask = mux->mask;
	mux_log[i].mux.alt = mux->alt;
	mux_log[i].is_configured = true;

	switch (mux->base) {
	case NSP_MUX_BASE0:
		base_address = pinctrl->base0;
		break;

	case NSP_MUX_BASE1:
		base_address = pinctrl->base1;
		break;

	case NSP_MUX_BASE2:
		base_address = pinctrl->base2;
		break;

	default:
		return -EINVAL;
	}

	spin_lock_irqsave(&pinctrl->lock, flags);
	val = readl(base_address);
	val &= ~(mask << grp->mux.shift);
	val |= grp->mux.alt << grp->mux.shift;
	writel(val, base_address);
	spin_unlock_irqrestore(&pinctrl->lock, flags);

	return 0;
}

static int nsp_pinmux_enable(struct pinctrl_dev *pctrl_dev,
			     unsigned int func_select, unsigned int grp_select)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
	const struct nsp_pin_function *func;
	const struct nsp_pin_group *grp;

	if (grp_select > pinctrl->num_groups ||
		func_select > pinctrl->num_functions)
		return -EINVAL;

	func = &pinctrl->functions[func_select];
	grp = &pinctrl->groups[grp_select];

	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
		func_select, func->name, grp_select, grp->name);

	dev_dbg(pctrl_dev->dev, "shift:%u alt:%u\n", grp->mux.shift,
		grp->mux.alt);

	return nsp_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
}


static int nsp_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
				   struct pinctrl_gpio_range *range,
				   unsigned int pin)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
	u32 *gpio_select = pctrl_dev->desc->pins[pin].drv_data;
	u32 val;
	unsigned long flags;

	spin_lock_irqsave(&pinctrl->lock, flags);
	val = readl(pinctrl->base0);
	if ((val & BIT(pin)) != (*gpio_select << pin)) {
		val &= ~BIT(pin);
		val |= *gpio_select << pin;
		writel(val, pinctrl->base0);
	}
	spin_unlock_irqrestore(&pinctrl->lock, flags);

	return 0;
}

static void nsp_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
				  struct pinctrl_gpio_range *range,
				  unsigned int pin)
{
	struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
	u32 *gpio_select = pctrl_dev->desc->pins[pin].drv_data;
	u32 val;
	unsigned long flags;

	spin_lock_irqsave(&pinctrl->lock, flags);
	val = readl(pinctrl->base0);
	if ((val & (1 << pin)) == (*gpio_select << pin)) {
		val &= ~(1 << pin);
		if (!(*gpio_select))
			val |= (1 << pin);
		writel(val, pinctrl->base0);
	}
	spin_unlock_irqrestore(&pinctrl->lock, flags);
}

static const struct pinmux_ops nsp_pinmux_ops = {
	.get_functions_count = nsp_get_functions_count,
	.get_function_name = nsp_get_function_name,
	.get_function_groups = nsp_get_function_groups,
	.set_mux = nsp_pinmux_enable,
	.gpio_request_enable = nsp_gpio_request_enable,
	.gpio_disable_free = nsp_gpio_disable_free,
};

static struct pinctrl_desc nsp_pinctrl_desc = {
	.name = "nsp-pinmux",
	.pctlops = &nsp_pinctrl_ops,
	.pmxops = &nsp_pinmux_ops,
};

static int nsp_mux_log_init(struct nsp_pinctrl *pinctrl)
{
	struct nsp_mux_log *log;
	unsigned int i;
	u32 no_of_groups = ARRAY_SIZE(nsp_pin_groups);

	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, no_of_groups,
					sizeof(struct nsp_mux_log),
					GFP_KERNEL);
	if (!pinctrl->mux_log)
		return -ENOMEM;

	for (i = 0; i < no_of_groups; i++) {
		log = &pinctrl->mux_log[i];
		log->mux.base = nsp_pin_groups[i].mux.base;
		log->mux.shift = nsp_pin_groups[i].mux.shift;
		log->mux.alt = 0;
		log->is_configured = false;
	}

	return 0;
}

static int nsp_pinmux_probe(struct platform_device *pdev)
{
	struct nsp_pinctrl *pinctrl;
	struct resource *res;
	int i, ret;
	struct pinctrl_pin_desc *pins;
	unsigned int num_pins = ARRAY_SIZE(nsp_pins);

	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
	if (!pinctrl)
		return -ENOMEM;
	pinctrl->dev = &pdev->dev;
	platform_set_drvdata(pdev, pinctrl);
	spin_lock_init(&pinctrl->lock);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(pinctrl->base0))
		return PTR_ERR(pinctrl->base0);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	pinctrl->base1 = devm_ioremap_nocache(&pdev->dev, res->start,
					      resource_size(res));
	if (!pinctrl->base1) {
		dev_err(&pdev->dev, "unable to map I/O space\n");
		return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
	pinctrl->base2 = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(pinctrl->base2))
		return PTR_ERR(pinctrl->base2);

	ret = nsp_mux_log_init(pinctrl);
	if (ret) {
		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
		return ret;
	}

	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
	if (!pins)
		return -ENOMEM;

	for (i = 0; i < num_pins; i++) {
		pins[i].number = nsp_pins[i].pin;
		pins[i].name = nsp_pins[i].name;
		pins[i].drv_data = &nsp_pins[i].gpio_select;
	}

	pinctrl->groups = nsp_pin_groups;
	pinctrl->num_groups = ARRAY_SIZE(nsp_pin_groups);
	pinctrl->functions = nsp_pin_functions;
	pinctrl->num_functions = ARRAY_SIZE(nsp_pin_functions);
	nsp_pinctrl_desc.pins = pins;
	nsp_pinctrl_desc.npins = num_pins;

	pinctrl->pctl = devm_pinctrl_register(&pdev->dev, &nsp_pinctrl_desc,
					 pinctrl);
	if (IS_ERR(pinctrl->pctl)) {
		dev_err(&pdev->dev, "unable to register nsp IOMUX pinctrl\n");
		return PTR_ERR(pinctrl->pctl);
	}

	return 0;
}

static const struct of_device_id nsp_pinmux_of_match[] = {
	{ .compatible = "brcm,nsp-pinmux" },
	{ }
};

static struct platform_driver nsp_pinmux_driver = {
	.driver = {
		.name = "nsp-pinmux",
		.of_match_table = nsp_pinmux_of_match,
	},
	.probe = nsp_pinmux_probe,
};

static int __init nsp_pinmux_init(void)
{
	return platform_driver_register(&nsp_pinmux_driver);
}
arch_initcall(nsp_pinmux_init);