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13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/slab.h>
16#include <linux/init.h>
17#include <linux/err.h>
18#include <linux/of.h>
19#include <linux/of_device.h>
20#include <linux/platform_device.h>
21#include <linux/gpio.h>
22#include <linux/irq.h>
23#include <linux/irqdomain.h>
24#include <linux/interrupt.h>
25#include <linux/bitops.h>
26#include <linux/mfd/abx500.h>
27#include <linux/mfd/abx500/ab8500.h>
28#include <linux/pinctrl/pinctrl.h>
29#include <linux/pinctrl/consumer.h>
30#include <linux/pinctrl/pinmux.h>
31#include <linux/pinctrl/pinconf.h>
32#include <linux/pinctrl/pinconf-generic.h>
33#include <linux/pinctrl/machine.h>
34
35#include "pinctrl-abx500.h"
36#include "../core.h"
37#include "../pinconf.h"
38#include "../pinctrl-utils.h"
39
40
41
42
43
44#define AB8500_GPIO_SEL1_REG 0x00
45#define AB8500_GPIO_SEL2_REG 0x01
46#define AB8500_GPIO_SEL3_REG 0x02
47#define AB8500_GPIO_SEL4_REG 0x03
48#define AB8500_GPIO_SEL5_REG 0x04
49#define AB8500_GPIO_SEL6_REG 0x05
50
51#define AB8500_GPIO_DIR1_REG 0x10
52#define AB8500_GPIO_DIR2_REG 0x11
53#define AB8500_GPIO_DIR3_REG 0x12
54#define AB8500_GPIO_DIR4_REG 0x13
55#define AB8500_GPIO_DIR5_REG 0x14
56#define AB8500_GPIO_DIR6_REG 0x15
57
58#define AB8500_GPIO_OUT1_REG 0x20
59#define AB8500_GPIO_OUT2_REG 0x21
60#define AB8500_GPIO_OUT3_REG 0x22
61#define AB8500_GPIO_OUT4_REG 0x23
62#define AB8500_GPIO_OUT5_REG 0x24
63#define AB8500_GPIO_OUT6_REG 0x25
64
65#define AB8500_GPIO_PUD1_REG 0x30
66#define AB8500_GPIO_PUD2_REG 0x31
67#define AB8500_GPIO_PUD3_REG 0x32
68#define AB8500_GPIO_PUD4_REG 0x33
69#define AB8500_GPIO_PUD5_REG 0x34
70#define AB8500_GPIO_PUD6_REG 0x35
71
72#define AB8500_GPIO_IN1_REG 0x40
73#define AB8500_GPIO_IN2_REG 0x41
74#define AB8500_GPIO_IN3_REG 0x42
75#define AB8500_GPIO_IN4_REG 0x43
76#define AB8500_GPIO_IN5_REG 0x44
77#define AB8500_GPIO_IN6_REG 0x45
78#define AB8500_GPIO_ALTFUN_REG 0x50
79
80#define ABX500_GPIO_INPUT 0
81#define ABX500_GPIO_OUTPUT 1
82
83struct abx500_pinctrl {
84 struct device *dev;
85 struct pinctrl_dev *pctldev;
86 struct abx500_pinctrl_soc_data *soc;
87 struct gpio_chip chip;
88 struct ab8500 *parent;
89 struct abx500_gpio_irq_cluster *irq_cluster;
90 int irq_cluster_size;
91};
92
93static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg,
94 unsigned offset, bool *bit)
95{
96 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
97 u8 pos = offset % 8;
98 u8 val;
99 int ret;
100
101 reg += offset / 8;
102 ret = abx500_get_register_interruptible(pct->dev,
103 AB8500_MISC, reg, &val);
104
105 *bit = !!(val & BIT(pos));
106
107 if (ret < 0)
108 dev_err(pct->dev,
109 "%s read reg =%x, offset=%x failed (%d)\n",
110 __func__, reg, offset, ret);
111
112 return ret;
113}
114
115static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg,
116 unsigned offset, int val)
117{
118 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
119 u8 pos = offset % 8;
120 int ret;
121
122 reg += offset / 8;
123 ret = abx500_mask_and_set_register_interruptible(pct->dev,
124 AB8500_MISC, reg, BIT(pos), val << pos);
125 if (ret < 0)
126 dev_err(pct->dev, "%s write reg, %x offset %x failed (%d)\n",
127 __func__, reg, offset, ret);
128
129 return ret;
130}
131
132
133
134
135
136
137static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset)
138{
139 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
140 bool bit;
141 bool is_out;
142 u8 gpio_offset = offset - 1;
143 int ret;
144
145 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG,
146 gpio_offset, &is_out);
147 if (ret < 0)
148 goto out;
149
150 if (is_out)
151 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_OUT1_REG,
152 gpio_offset, &bit);
153 else
154 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_IN1_REG,
155 gpio_offset, &bit);
156out:
157 if (ret < 0) {
158 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
159 return ret;
160 }
161
162 return bit;
163}
164
165static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
166{
167 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
168 int ret;
169
170 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val);
171 if (ret < 0)
172 dev_err(pct->dev, "%s write failed (%d)\n", __func__, ret);
173}
174
175static int abx500_gpio_direction_output(struct gpio_chip *chip,
176 unsigned offset,
177 int val)
178{
179 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
180 int ret;
181
182
183 ret = abx500_gpio_set_bits(chip,
184 AB8500_GPIO_DIR1_REG,
185 offset,
186 ABX500_GPIO_OUTPUT);
187 if (ret < 0)
188 goto out;
189
190
191 ret = abx500_gpio_set_bits(chip,
192 AB8500_GPIO_PUD1_REG,
193 offset,
194 ABX500_GPIO_PULL_NONE);
195
196out:
197 if (ret < 0) {
198 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
199 return ret;
200 }
201
202
203 return abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val);
204}
205
206static int abx500_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
207{
208
209 return abx500_gpio_set_bits(chip,
210 AB8500_GPIO_DIR1_REG,
211 offset,
212 ABX500_GPIO_INPUT);
213}
214
215static int abx500_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
216{
217 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
218
219 int gpio = offset + 1;
220 int hwirq;
221 int i;
222
223 for (i = 0; i < pct->irq_cluster_size; i++) {
224 struct abx500_gpio_irq_cluster *cluster =
225 &pct->irq_cluster[i];
226
227 if (gpio >= cluster->start && gpio <= cluster->end) {
228
229
230
231
232
233
234 hwirq = gpio - cluster->start + cluster->to_irq;
235 return irq_create_mapping(pct->parent->domain, hwirq);
236 }
237 }
238
239 return -EINVAL;
240}
241
242static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
243 unsigned gpio, int alt_setting)
244{
245 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
246 struct alternate_functions af = pct->soc->alternate_functions[gpio];
247 int ret;
248 int val;
249 unsigned offset;
250
251 const char *modes[] = {
252 [ABX500_DEFAULT] = "default",
253 [ABX500_ALT_A] = "altA",
254 [ABX500_ALT_B] = "altB",
255 [ABX500_ALT_C] = "altC",
256 };
257
258
259 if (((alt_setting == ABX500_ALT_A) && (af.gpiosel_bit == UNUSED)) ||
260 ((alt_setting == ABX500_ALT_B) && (af.alt_bit1 == UNUSED)) ||
261 ((alt_setting == ABX500_ALT_C) && (af.alt_bit2 == UNUSED))) {
262 dev_dbg(pct->dev, "pin %d doesn't support %s mode\n", gpio,
263 modes[alt_setting]);
264 return -EINVAL;
265 }
266
267
268 offset = gpio - 1;
269
270 switch (alt_setting) {
271 case ABX500_DEFAULT:
272
273
274
275
276
277
278 val = 0;
279 if (af.alt_bit1 != UNUSED)
280 val++;
281
282 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
283 offset, val);
284 break;
285
286 case ABX500_ALT_A:
287
288
289
290
291
292
293
294 if (af.alt_bit1 != UNUSED) {
295 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
296 offset, 0);
297 if (ret < 0)
298 goto out;
299
300 ret = abx500_gpio_set_bits(chip,
301 AB8500_GPIO_ALTFUN_REG,
302 af.alt_bit1,
303 !!(af.alta_val & BIT(0)));
304 if (ret < 0)
305 goto out;
306
307 if (af.alt_bit2 != UNUSED)
308 ret = abx500_gpio_set_bits(chip,
309 AB8500_GPIO_ALTFUN_REG,
310 af.alt_bit2,
311 !!(af.alta_val & BIT(1)));
312 } else
313 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
314 offset, 1);
315 break;
316
317 case ABX500_ALT_B:
318 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
319 offset, 0);
320 if (ret < 0)
321 goto out;
322
323 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
324 af.alt_bit1, !!(af.altb_val & BIT(0)));
325 if (ret < 0)
326 goto out;
327
328 if (af.alt_bit2 != UNUSED)
329 ret = abx500_gpio_set_bits(chip,
330 AB8500_GPIO_ALTFUN_REG,
331 af.alt_bit2,
332 !!(af.altb_val & BIT(1)));
333 break;
334
335 case ABX500_ALT_C:
336 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
337 offset, 0);
338 if (ret < 0)
339 goto out;
340
341 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
342 af.alt_bit2, !!(af.altc_val & BIT(0)));
343 if (ret < 0)
344 goto out;
345
346 ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
347 af.alt_bit2, !!(af.altc_val & BIT(1)));
348 break;
349
350 default:
351 dev_dbg(pct->dev, "unknown alt_setting %d\n", alt_setting);
352
353 return -EINVAL;
354 }
355out:
356 if (ret < 0)
357 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
358
359 return ret;
360}
361
362#ifdef CONFIG_DEBUG_FS
363static int abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
364 unsigned gpio)
365{
366 u8 mode;
367 bool bit_mode;
368 bool alt_bit1;
369 bool alt_bit2;
370 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
371 struct alternate_functions af = pct->soc->alternate_functions[gpio];
372
373 unsigned offset = gpio - 1;
374 int ret;
375
376
377
378
379
380 if (af.gpiosel_bit == UNUSED)
381 return ABX500_DEFAULT;
382
383
384 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_SEL1_REG + (offset / 8),
385 af.gpiosel_bit, &bit_mode);
386 if (ret < 0)
387 goto out;
388
389 mode = bit_mode;
390
391
392 if ((af.alt_bit1 < UNUSED) || (af.alt_bit1 > 7) ||
393 (af.alt_bit2 < UNUSED) || (af.alt_bit2 > 7)) {
394 dev_err(pct->dev,
395 "alt_bitX value not in correct range (-1 to 7)\n");
396 return -EINVAL;
397 }
398
399
400 if ((af.alt_bit2 != UNUSED) && (af.alt_bit1 == UNUSED)) {
401 dev_err(pct->dev,
402 "if alt_bit2 is used, alt_bit1 can't be unused\n");
403 return -EINVAL;
404 }
405
406
407 if ((af.alt_bit1 == UNUSED) && (af.alt_bit2 == UNUSED))
408 return mode;
409
410
411
412
413 if (mode)
414 return ABX500_DEFAULT;
415
416
417
418
419
420 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG,
421 af.alt_bit1, &alt_bit1);
422 if (ret < 0)
423 goto out;
424
425 if (af.alt_bit2 != UNUSED) {
426
427 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG,
428 af.alt_bit2,
429 &alt_bit2);
430 if (ret < 0)
431 goto out;
432 } else
433 alt_bit2 = 0;
434
435 mode = (alt_bit2 << 1) + alt_bit1;
436 if (mode == af.alta_val)
437 return ABX500_ALT_A;
438 else if (mode == af.altb_val)
439 return ABX500_ALT_B;
440 else
441 return ABX500_ALT_C;
442
443out:
444 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
445 return ret;
446}
447
448#include <linux/seq_file.h>
449
450static void abx500_gpio_dbg_show_one(struct seq_file *s,
451 struct pinctrl_dev *pctldev,
452 struct gpio_chip *chip,
453 unsigned offset, unsigned gpio)
454{
455 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
456 const char *label = gpiochip_is_requested(chip, offset - 1);
457 u8 gpio_offset = offset - 1;
458 int mode = -1;
459 bool is_out;
460 bool pd;
461 int ret;
462
463 const char *modes[] = {
464 [ABX500_DEFAULT] = "default",
465 [ABX500_ALT_A] = "altA",
466 [ABX500_ALT_B] = "altB",
467 [ABX500_ALT_C] = "altC",
468 };
469
470 const char *pull_up_down[] = {
471 [ABX500_GPIO_PULL_DOWN] = "pull down",
472 [ABX500_GPIO_PULL_NONE] = "pull none",
473 [ABX500_GPIO_PULL_NONE + 1] = "pull none",
474 [ABX500_GPIO_PULL_UP] = "pull up",
475 };
476
477 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG,
478 gpio_offset, &is_out);
479 if (ret < 0)
480 goto out;
481
482 seq_printf(s, " gpio-%-3d (%-20.20s) %-3s",
483 gpio, label ?: "(none)",
484 is_out ? "out" : "in ");
485
486 if (!is_out) {
487 ret = abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG,
488 gpio_offset, &pd);
489 if (ret < 0)
490 goto out;
491
492 seq_printf(s, " %-9s", pull_up_down[pd]);
493 } else
494 seq_printf(s, " %-9s", chip->get(chip, offset) ? "hi" : "lo");
495
496 mode = abx500_get_mode(pctldev, chip, offset);
497
498 seq_printf(s, " %s", (mode < 0) ? "unknown" : modes[mode]);
499
500out:
501 if (ret < 0)
502 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
503}
504
505static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
506{
507 unsigned i;
508 unsigned gpio = chip->base;
509 struct abx500_pinctrl *pct = gpiochip_get_data(chip);
510 struct pinctrl_dev *pctldev = pct->pctldev;
511
512 for (i = 0; i < chip->ngpio; i++, gpio++) {
513
514 abx500_gpio_dbg_show_one(s, pctldev, chip, i + 1, gpio);
515 seq_putc(s, '\n');
516 }
517}
518
519#else
520static inline void abx500_gpio_dbg_show_one(struct seq_file *s,
521 struct pinctrl_dev *pctldev,
522 struct gpio_chip *chip,
523 unsigned offset, unsigned gpio)
524{
525}
526#define abx500_gpio_dbg_show NULL
527#endif
528
529static const struct gpio_chip abx500gpio_chip = {
530 .label = "abx500-gpio",
531 .owner = THIS_MODULE,
532 .request = gpiochip_generic_request,
533 .free = gpiochip_generic_free,
534 .direction_input = abx500_gpio_direction_input,
535 .get = abx500_gpio_get,
536 .direction_output = abx500_gpio_direction_output,
537 .set = abx500_gpio_set,
538 .to_irq = abx500_gpio_to_irq,
539 .dbg_show = abx500_gpio_dbg_show,
540};
541
542static int abx500_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
543{
544 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
545
546 return pct->soc->nfunctions;
547}
548
549static const char *abx500_pmx_get_func_name(struct pinctrl_dev *pctldev,
550 unsigned function)
551{
552 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
553
554 return pct->soc->functions[function].name;
555}
556
557static int abx500_pmx_get_func_groups(struct pinctrl_dev *pctldev,
558 unsigned function,
559 const char * const **groups,
560 unsigned * const num_groups)
561{
562 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
563
564 *groups = pct->soc->functions[function].groups;
565 *num_groups = pct->soc->functions[function].ngroups;
566
567 return 0;
568}
569
570static int abx500_pmx_set(struct pinctrl_dev *pctldev, unsigned function,
571 unsigned group)
572{
573 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
574 struct gpio_chip *chip = &pct->chip;
575 const struct abx500_pingroup *g;
576 int i;
577 int ret = 0;
578
579 g = &pct->soc->groups[group];
580 if (g->altsetting < 0)
581 return -EINVAL;
582
583 dev_dbg(pct->dev, "enable group %s, %u pins\n", g->name, g->npins);
584
585 for (i = 0; i < g->npins; i++) {
586 dev_dbg(pct->dev, "setting pin %d to altsetting %d\n",
587 g->pins[i], g->altsetting);
588
589 ret = abx500_set_mode(pctldev, chip, g->pins[i], g->altsetting);
590 }
591
592 if (ret < 0)
593 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
594
595 return ret;
596}
597
598static int abx500_gpio_request_enable(struct pinctrl_dev *pctldev,
599 struct pinctrl_gpio_range *range,
600 unsigned offset)
601{
602 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
603 const struct abx500_pinrange *p;
604 int ret;
605 int i;
606
607
608
609
610
611
612 for (i = 0; i < pct->soc->gpio_num_ranges; i++) {
613 p = &pct->soc->gpio_ranges[i];
614 if ((offset >= p->offset) &&
615 (offset < (p->offset + p->npins)))
616 break;
617 }
618
619 if (i == pct->soc->gpio_num_ranges) {
620 dev_err(pct->dev, "%s failed to locate range\n", __func__);
621 return -ENODEV;
622 }
623
624 dev_dbg(pct->dev, "enable GPIO by altfunc %d at gpio %d\n",
625 p->altfunc, offset);
626
627 ret = abx500_set_mode(pct->pctldev, &pct->chip,
628 offset, p->altfunc);
629 if (ret < 0)
630 dev_err(pct->dev, "%s setting altfunc failed\n", __func__);
631
632 return ret;
633}
634
635static void abx500_gpio_disable_free(struct pinctrl_dev *pctldev,
636 struct pinctrl_gpio_range *range,
637 unsigned offset)
638{
639}
640
641static const struct pinmux_ops abx500_pinmux_ops = {
642 .get_functions_count = abx500_pmx_get_funcs_cnt,
643 .get_function_name = abx500_pmx_get_func_name,
644 .get_function_groups = abx500_pmx_get_func_groups,
645 .set_mux = abx500_pmx_set,
646 .gpio_request_enable = abx500_gpio_request_enable,
647 .gpio_disable_free = abx500_gpio_disable_free,
648};
649
650static int abx500_get_groups_cnt(struct pinctrl_dev *pctldev)
651{
652 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
653
654 return pct->soc->ngroups;
655}
656
657static const char *abx500_get_group_name(struct pinctrl_dev *pctldev,
658 unsigned selector)
659{
660 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
661
662 return pct->soc->groups[selector].name;
663}
664
665static int abx500_get_group_pins(struct pinctrl_dev *pctldev,
666 unsigned selector,
667 const unsigned **pins,
668 unsigned *num_pins)
669{
670 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
671
672 *pins = pct->soc->groups[selector].pins;
673 *num_pins = pct->soc->groups[selector].npins;
674
675 return 0;
676}
677
678static void abx500_pin_dbg_show(struct pinctrl_dev *pctldev,
679 struct seq_file *s, unsigned offset)
680{
681 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
682 struct gpio_chip *chip = &pct->chip;
683
684 abx500_gpio_dbg_show_one(s, pctldev, chip, offset,
685 chip->base + offset - 1);
686}
687
688static int abx500_dt_add_map_mux(struct pinctrl_map **map,
689 unsigned *reserved_maps,
690 unsigned *num_maps, const char *group,
691 const char *function)
692{
693 if (*num_maps == *reserved_maps)
694 return -ENOSPC;
695
696 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
697 (*map)[*num_maps].data.mux.group = group;
698 (*map)[*num_maps].data.mux.function = function;
699 (*num_maps)++;
700
701 return 0;
702}
703
704static int abx500_dt_add_map_configs(struct pinctrl_map **map,
705 unsigned *reserved_maps,
706 unsigned *num_maps, const char *group,
707 unsigned long *configs, unsigned num_configs)
708{
709 unsigned long *dup_configs;
710
711 if (*num_maps == *reserved_maps)
712 return -ENOSPC;
713
714 dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
715 GFP_KERNEL);
716 if (!dup_configs)
717 return -ENOMEM;
718
719 (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_PIN;
720
721 (*map)[*num_maps].data.configs.group_or_pin = group;
722 (*map)[*num_maps].data.configs.configs = dup_configs;
723 (*map)[*num_maps].data.configs.num_configs = num_configs;
724 (*num_maps)++;
725
726 return 0;
727}
728
729static const char *abx500_find_pin_name(struct pinctrl_dev *pctldev,
730 const char *pin_name)
731{
732 int i, pin_number;
733 struct abx500_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
734
735 if (sscanf((char *)pin_name, "GPIO%d", &pin_number) == 1)
736 for (i = 0; i < npct->soc->npins; i++)
737 if (npct->soc->pins[i].number == pin_number)
738 return npct->soc->pins[i].name;
739 return NULL;
740}
741
742static int abx500_dt_subnode_to_map(struct pinctrl_dev *pctldev,
743 struct device_node *np,
744 struct pinctrl_map **map,
745 unsigned *reserved_maps,
746 unsigned *num_maps)
747{
748 int ret;
749 const char *function = NULL;
750 unsigned long *configs;
751 unsigned int nconfigs = 0;
752 struct property *prop;
753
754 ret = of_property_read_string(np, "function", &function);
755 if (ret >= 0) {
756 const char *group;
757
758 ret = of_property_count_strings(np, "groups");
759 if (ret < 0)
760 goto exit;
761
762 ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
763 num_maps, ret);
764 if (ret < 0)
765 goto exit;
766
767 of_property_for_each_string(np, "groups", prop, group) {
768 ret = abx500_dt_add_map_mux(map, reserved_maps,
769 num_maps, group, function);
770 if (ret < 0)
771 goto exit;
772 }
773 }
774
775 ret = pinconf_generic_parse_dt_config(np, pctldev, &configs, &nconfigs);
776 if (nconfigs) {
777 const char *gpio_name;
778 const char *pin;
779
780 ret = of_property_count_strings(np, "pins");
781 if (ret < 0)
782 goto exit;
783
784 ret = pinctrl_utils_reserve_map(pctldev, map,
785 reserved_maps,
786 num_maps, ret);
787 if (ret < 0)
788 goto exit;
789
790 of_property_for_each_string(np, "pins", prop, pin) {
791 gpio_name = abx500_find_pin_name(pctldev, pin);
792
793 ret = abx500_dt_add_map_configs(map, reserved_maps,
794 num_maps, gpio_name, configs, 1);
795 if (ret < 0)
796 goto exit;
797 }
798 }
799
800exit:
801 return ret;
802}
803
804static int abx500_dt_node_to_map(struct pinctrl_dev *pctldev,
805 struct device_node *np_config,
806 struct pinctrl_map **map, unsigned *num_maps)
807{
808 unsigned reserved_maps;
809 struct device_node *np;
810 int ret;
811
812 reserved_maps = 0;
813 *map = NULL;
814 *num_maps = 0;
815
816 for_each_child_of_node(np_config, np) {
817 ret = abx500_dt_subnode_to_map(pctldev, np, map,
818 &reserved_maps, num_maps);
819 if (ret < 0) {
820 pinctrl_utils_free_map(pctldev, *map, *num_maps);
821 return ret;
822 }
823 }
824
825 return 0;
826}
827
828static const struct pinctrl_ops abx500_pinctrl_ops = {
829 .get_groups_count = abx500_get_groups_cnt,
830 .get_group_name = abx500_get_group_name,
831 .get_group_pins = abx500_get_group_pins,
832 .pin_dbg_show = abx500_pin_dbg_show,
833 .dt_node_to_map = abx500_dt_node_to_map,
834 .dt_free_map = pinctrl_utils_free_map,
835};
836
837static int abx500_pin_config_get(struct pinctrl_dev *pctldev,
838 unsigned pin,
839 unsigned long *config)
840{
841 return -ENOSYS;
842}
843
844static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
845 unsigned pin,
846 unsigned long *configs,
847 unsigned num_configs)
848{
849 struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
850 struct gpio_chip *chip = &pct->chip;
851 unsigned offset;
852 int ret = -EINVAL;
853 int i;
854 enum pin_config_param param;
855 enum pin_config_param argument;
856
857 for (i = 0; i < num_configs; i++) {
858 param = pinconf_to_config_param(configs[i]);
859 argument = pinconf_to_config_argument(configs[i]);
860
861 dev_dbg(chip->parent, "pin %d [%#lx]: %s %s\n",
862 pin, configs[i],
863 (param == PIN_CONFIG_OUTPUT) ? "output " : "input",
864 (param == PIN_CONFIG_OUTPUT) ?
865 (argument ? "high" : "low") :
866 (argument ? "pull up" : "pull down"));
867
868
869 offset = pin - 1;
870
871 switch (param) {
872 case PIN_CONFIG_BIAS_DISABLE:
873 ret = abx500_gpio_direction_input(chip, offset);
874 if (ret < 0)
875 goto out;
876
877
878 ret = abx500_gpio_set_bits(chip,
879 AB8500_GPIO_PUD1_REG, offset,
880 ABX500_GPIO_PULL_NONE);
881 break;
882
883 case PIN_CONFIG_BIAS_PULL_DOWN:
884 ret = abx500_gpio_direction_input(chip, offset);
885 if (ret < 0)
886 goto out;
887
888
889
890
891
892 ret = abx500_gpio_set_bits(chip,
893 AB8500_GPIO_PUD1_REG,
894 offset,
895 argument ? ABX500_GPIO_PULL_DOWN :
896 ABX500_GPIO_PULL_NONE);
897 break;
898
899 case PIN_CONFIG_BIAS_PULL_UP:
900 ret = abx500_gpio_direction_input(chip, offset);
901 if (ret < 0)
902 goto out;
903
904
905
906
907 ret = abx500_gpio_direction_input(chip, offset);
908 break;
909
910 case PIN_CONFIG_OUTPUT:
911 ret = abx500_gpio_direction_output(chip, offset,
912 argument);
913 break;
914
915 default:
916 dev_err(chip->parent,
917 "illegal configuration requested\n");
918 }
919 }
920out:
921 if (ret < 0)
922 dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
923
924 return ret;
925}
926
927static const struct pinconf_ops abx500_pinconf_ops = {
928 .pin_config_get = abx500_pin_config_get,
929 .pin_config_set = abx500_pin_config_set,
930 .is_generic = true,
931};
932
933static struct pinctrl_desc abx500_pinctrl_desc = {
934 .name = "pinctrl-abx500",
935 .pctlops = &abx500_pinctrl_ops,
936 .pmxops = &abx500_pinmux_ops,
937 .confops = &abx500_pinconf_ops,
938 .owner = THIS_MODULE,
939};
940
941static int abx500_get_gpio_num(struct abx500_pinctrl_soc_data *soc)
942{
943 unsigned int lowest = 0;
944 unsigned int highest = 0;
945 unsigned int npins = 0;
946 int i;
947
948
949
950
951
952
953
954 for (i = 0; i < soc->gpio_num_ranges; i++) {
955 unsigned gstart;
956 unsigned gend;
957 const struct abx500_pinrange *p;
958
959 p = &soc->gpio_ranges[i];
960 gstart = p->offset;
961 gend = p->offset + p->npins - 1;
962
963 if (i == 0) {
964
965 lowest = gstart;
966 highest = gend;
967 } else {
968 if (gstart < lowest)
969 lowest = gstart;
970 if (gend > highest)
971 highest = gend;
972 }
973 }
974
975 npins = highest - lowest + 1;
976 return npins;
977}
978
979static const struct of_device_id abx500_gpio_match[] = {
980 { .compatible = "stericsson,ab8500-gpio", .data = (void *)PINCTRL_AB8500, },
981 { .compatible = "stericsson,ab8505-gpio", .data = (void *)PINCTRL_AB8505, },
982 { }
983};
984
985static int abx500_gpio_probe(struct platform_device *pdev)
986{
987 struct device_node *np = pdev->dev.of_node;
988 const struct of_device_id *match;
989 struct abx500_pinctrl *pct;
990 unsigned int id = -1;
991 int ret;
992 int i;
993
994 if (!np) {
995 dev_err(&pdev->dev, "gpio dt node missing\n");
996 return -ENODEV;
997 }
998
999 pct = devm_kzalloc(&pdev->dev, sizeof(*pct), GFP_KERNEL);
1000 if (!pct)
1001 return -ENOMEM;
1002
1003 pct->dev = &pdev->dev;
1004 pct->parent = dev_get_drvdata(pdev->dev.parent);
1005 pct->chip = abx500gpio_chip;
1006 pct->chip.parent = &pdev->dev;
1007 pct->chip.base = -1;
1008
1009 match = of_match_device(abx500_gpio_match, &pdev->dev);
1010 if (!match) {
1011 dev_err(&pdev->dev, "gpio dt not matching\n");
1012 return -ENODEV;
1013 }
1014 id = (unsigned long)match->data;
1015
1016
1017 switch (id) {
1018 case PINCTRL_AB8500:
1019 abx500_pinctrl_ab8500_init(&pct->soc);
1020 break;
1021 case PINCTRL_AB8505:
1022 abx500_pinctrl_ab8505_init(&pct->soc);
1023 break;
1024 default:
1025 dev_err(&pdev->dev, "Unsupported pinctrl sub driver (%d)\n", id);
1026 return -EINVAL;
1027 }
1028
1029 if (!pct->soc) {
1030 dev_err(&pdev->dev, "Invalid SOC data\n");
1031 return -EINVAL;
1032 }
1033
1034 pct->chip.ngpio = abx500_get_gpio_num(pct->soc);
1035 pct->irq_cluster = pct->soc->gpio_irq_cluster;
1036 pct->irq_cluster_size = pct->soc->ngpio_irq_cluster;
1037
1038 ret = gpiochip_add_data(&pct->chip, pct);
1039 if (ret) {
1040 dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret);
1041 return ret;
1042 }
1043 dev_info(&pdev->dev, "added gpiochip\n");
1044
1045 abx500_pinctrl_desc.pins = pct->soc->pins;
1046 abx500_pinctrl_desc.npins = pct->soc->npins;
1047 pct->pctldev = devm_pinctrl_register(&pdev->dev, &abx500_pinctrl_desc,
1048 pct);
1049 if (IS_ERR(pct->pctldev)) {
1050 dev_err(&pdev->dev,
1051 "could not register abx500 pinctrl driver\n");
1052 ret = PTR_ERR(pct->pctldev);
1053 goto out_rem_chip;
1054 }
1055 dev_info(&pdev->dev, "registered pin controller\n");
1056
1057
1058 for (i = 0; i < pct->soc->gpio_num_ranges; i++) {
1059 const struct abx500_pinrange *p = &pct->soc->gpio_ranges[i];
1060
1061 ret = gpiochip_add_pin_range(&pct->chip,
1062 dev_name(&pdev->dev),
1063 p->offset - 1, p->offset, p->npins);
1064 if (ret < 0)
1065 goto out_rem_chip;
1066 }
1067
1068 platform_set_drvdata(pdev, pct);
1069 dev_info(&pdev->dev, "initialized abx500 pinctrl driver\n");
1070
1071 return 0;
1072
1073out_rem_chip:
1074 gpiochip_remove(&pct->chip);
1075 return ret;
1076}
1077
1078
1079
1080
1081
1082static int abx500_gpio_remove(struct platform_device *pdev)
1083{
1084 struct abx500_pinctrl *pct = platform_get_drvdata(pdev);
1085
1086 gpiochip_remove(&pct->chip);
1087 return 0;
1088}
1089
1090static struct platform_driver abx500_gpio_driver = {
1091 .driver = {
1092 .name = "abx500-gpio",
1093 .of_match_table = abx500_gpio_match,
1094 },
1095 .probe = abx500_gpio_probe,
1096 .remove = abx500_gpio_remove,
1097};
1098
1099static int __init abx500_gpio_init(void)
1100{
1101 return platform_driver_register(&abx500_gpio_driver);
1102}
1103core_initcall(abx500_gpio_init);
1104
