Merge tag 'for-linus-5.12b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / drivers / pinctrl / samsung / pinctrl-samsung.c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's.
4 //
5 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 //              http://www.samsung.com
7 // Copyright (c) 2012 Linaro Ltd
8 //              http://www.linaro.org
9 //
10 // Author: Thomas Abraham <thomas.ab@samsung.com>
11 //
12 // This driver implements the Samsung pinctrl driver. It supports setting up of
13 // pinmux and pinconf configurations. The gpiolib interface is also included.
14 // External interrupt (gpio and wakeup) support are not included in this driver
15 // but provides extensions to which platform specific implementation of the gpio
16 // and wakeup interrupts can be hooked to.
17
18 #include <linux/init.h>
19 #include <linux/platform_device.h>
20 #include <linux/io.h>
21 #include <linux/slab.h>
22 #include <linux/err.h>
23 #include <linux/gpio/driver.h>
24 #include <linux/irqdomain.h>
25 #include <linux/of_device.h>
26 #include <linux/spinlock.h>
27
28 #include <dt-bindings/pinctrl/samsung.h>
29
30 #include "../core.h"
31 #include "pinctrl-samsung.h"
32
33 /* maximum number of the memory resources */
34 #define SAMSUNG_PINCTRL_NUM_RESOURCES   2
35
36 /* list of all possible config options supported */
37 static struct pin_config {
38         const char *property;
39         enum pincfg_type param;
40 } cfg_params[] = {
41         { "samsung,pin-pud", PINCFG_TYPE_PUD },
42         { "samsung,pin-drv", PINCFG_TYPE_DRV },
43         { "samsung,pin-con-pdn", PINCFG_TYPE_CON_PDN },
44         { "samsung,pin-pud-pdn", PINCFG_TYPE_PUD_PDN },
45         { "samsung,pin-val", PINCFG_TYPE_DAT },
46 };
47
48 static unsigned int pin_base;
49
50 static int samsung_get_group_count(struct pinctrl_dev *pctldev)
51 {
52         struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
53
54         return pmx->nr_groups;
55 }
56
57 static const char *samsung_get_group_name(struct pinctrl_dev *pctldev,
58                                                 unsigned group)
59 {
60         struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
61
62         return pmx->pin_groups[group].name;
63 }
64
65 static int samsung_get_group_pins(struct pinctrl_dev *pctldev,
66                                         unsigned group,
67                                         const unsigned **pins,
68                                         unsigned *num_pins)
69 {
70         struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
71
72         *pins = pmx->pin_groups[group].pins;
73         *num_pins = pmx->pin_groups[group].num_pins;
74
75         return 0;
76 }
77
78 static int reserve_map(struct device *dev, struct pinctrl_map **map,
79                        unsigned *reserved_maps, unsigned *num_maps,
80                        unsigned reserve)
81 {
82         unsigned old_num = *reserved_maps;
83         unsigned new_num = *num_maps + reserve;
84         struct pinctrl_map *new_map;
85
86         if (old_num >= new_num)
87                 return 0;
88
89         new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
90         if (!new_map)
91                 return -ENOMEM;
92
93         memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
94
95         *map = new_map;
96         *reserved_maps = new_num;
97
98         return 0;
99 }
100
101 static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
102                        unsigned *num_maps, const char *group,
103                        const char *function)
104 {
105         if (WARN_ON(*num_maps == *reserved_maps))
106                 return -ENOSPC;
107
108         (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
109         (*map)[*num_maps].data.mux.group = group;
110         (*map)[*num_maps].data.mux.function = function;
111         (*num_maps)++;
112
113         return 0;
114 }
115
116 static int add_map_configs(struct device *dev, struct pinctrl_map **map,
117                            unsigned *reserved_maps, unsigned *num_maps,
118                            const char *group, unsigned long *configs,
119                            unsigned num_configs)
120 {
121         unsigned long *dup_configs;
122
123         if (WARN_ON(*num_maps == *reserved_maps))
124                 return -ENOSPC;
125
126         dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
127                               GFP_KERNEL);
128         if (!dup_configs)
129                 return -ENOMEM;
130
131         (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
132         (*map)[*num_maps].data.configs.group_or_pin = group;
133         (*map)[*num_maps].data.configs.configs = dup_configs;
134         (*map)[*num_maps].data.configs.num_configs = num_configs;
135         (*num_maps)++;
136
137         return 0;
138 }
139
140 static int add_config(struct device *dev, unsigned long **configs,
141                       unsigned *num_configs, unsigned long config)
142 {
143         unsigned old_num = *num_configs;
144         unsigned new_num = old_num + 1;
145         unsigned long *new_configs;
146
147         new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
148                                GFP_KERNEL);
149         if (!new_configs)
150                 return -ENOMEM;
151
152         new_configs[old_num] = config;
153
154         *configs = new_configs;
155         *num_configs = new_num;
156
157         return 0;
158 }
159
160 static void samsung_dt_free_map(struct pinctrl_dev *pctldev,
161                                       struct pinctrl_map *map,
162                                       unsigned num_maps)
163 {
164         int i;
165
166         for (i = 0; i < num_maps; i++)
167                 if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
168                         kfree(map[i].data.configs.configs);
169
170         kfree(map);
171 }
172
173 static int samsung_dt_subnode_to_map(struct samsung_pinctrl_drv_data *drvdata,
174                                      struct device *dev,
175                                      struct device_node *np,
176                                      struct pinctrl_map **map,
177                                      unsigned *reserved_maps,
178                                      unsigned *num_maps)
179 {
180         int ret, i;
181         u32 val;
182         unsigned long config;
183         unsigned long *configs = NULL;
184         unsigned num_configs = 0;
185         unsigned reserve;
186         struct property *prop;
187         const char *group;
188         bool has_func = false;
189
190         ret = of_property_read_u32(np, "samsung,pin-function", &val);
191         if (!ret)
192                 has_func = true;
193
194         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
195                 ret = of_property_read_u32(np, cfg_params[i].property, &val);
196                 if (!ret) {
197                         config = PINCFG_PACK(cfg_params[i].param, val);
198                         ret = add_config(dev, &configs, &num_configs, config);
199                         if (ret < 0)
200                                 goto exit;
201                 /* EINVAL=missing, which is fine since it's optional */
202                 } else if (ret != -EINVAL) {
203                         dev_err(dev, "could not parse property %s\n",
204                                 cfg_params[i].property);
205                 }
206         }
207
208         reserve = 0;
209         if (has_func)
210                 reserve++;
211         if (num_configs)
212                 reserve++;
213         ret = of_property_count_strings(np, "samsung,pins");
214         if (ret < 0) {
215                 dev_err(dev, "could not parse property samsung,pins\n");
216                 goto exit;
217         }
218         reserve *= ret;
219
220         ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
221         if (ret < 0)
222                 goto exit;
223
224         of_property_for_each_string(np, "samsung,pins", prop, group) {
225                 if (has_func) {
226                         ret = add_map_mux(map, reserved_maps,
227                                                 num_maps, group, np->full_name);
228                         if (ret < 0)
229                                 goto exit;
230                 }
231
232                 if (num_configs) {
233                         ret = add_map_configs(dev, map, reserved_maps,
234                                               num_maps, group, configs,
235                                               num_configs);
236                         if (ret < 0)
237                                 goto exit;
238                 }
239         }
240
241         ret = 0;
242
243 exit:
244         kfree(configs);
245         return ret;
246 }
247
248 static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
249                                         struct device_node *np_config,
250                                         struct pinctrl_map **map,
251                                         unsigned *num_maps)
252 {
253         struct samsung_pinctrl_drv_data *drvdata;
254         unsigned reserved_maps;
255         struct device_node *np;
256         int ret;
257
258         drvdata = pinctrl_dev_get_drvdata(pctldev);
259
260         reserved_maps = 0;
261         *map = NULL;
262         *num_maps = 0;
263
264         if (!of_get_child_count(np_config))
265                 return samsung_dt_subnode_to_map(drvdata, pctldev->dev,
266                                                         np_config, map,
267                                                         &reserved_maps,
268                                                         num_maps);
269
270         for_each_child_of_node(np_config, np) {
271                 ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev, np, map,
272                                                 &reserved_maps, num_maps);
273                 if (ret < 0) {
274                         samsung_dt_free_map(pctldev, *map, *num_maps);
275                         of_node_put(np);
276                         return ret;
277                 }
278         }
279
280         return 0;
281 }
282
283 #ifdef CONFIG_DEBUG_FS
284 /* Forward declaration which can be used by samsung_pin_dbg_show */
285 static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
286                                         unsigned long *config);
287 static const char * const reg_names[] = {"CON", "DAT", "PUD", "DRV", "CON_PDN",
288                                          "PUD_PDN"};
289
290 static void samsung_pin_dbg_show(struct pinctrl_dev *pctldev,
291                                 struct seq_file *s, unsigned int pin)
292 {
293         enum pincfg_type cfg_type;
294         unsigned long config;
295         int ret;
296
297         for (cfg_type = 0; cfg_type < PINCFG_TYPE_NUM; cfg_type++) {
298                 config = PINCFG_PACK(cfg_type, 0);
299                 ret = samsung_pinconf_get(pctldev, pin, &config);
300                 if (ret < 0)
301                         continue;
302
303                 seq_printf(s, " %s(0x%lx)", reg_names[cfg_type],
304                            PINCFG_UNPACK_VALUE(config));
305         }
306 }
307 #endif
308
309 /* list of pinctrl callbacks for the pinctrl core */
310 static const struct pinctrl_ops samsung_pctrl_ops = {
311         .get_groups_count       = samsung_get_group_count,
312         .get_group_name         = samsung_get_group_name,
313         .get_group_pins         = samsung_get_group_pins,
314         .dt_node_to_map         = samsung_dt_node_to_map,
315         .dt_free_map            = samsung_dt_free_map,
316 #ifdef CONFIG_DEBUG_FS
317         .pin_dbg_show           = samsung_pin_dbg_show,
318 #endif
319 };
320
321 /* check if the selector is a valid pin function selector */
322 static int samsung_get_functions_count(struct pinctrl_dev *pctldev)
323 {
324         struct samsung_pinctrl_drv_data *drvdata;
325
326         drvdata = pinctrl_dev_get_drvdata(pctldev);
327         return drvdata->nr_functions;
328 }
329
330 /* return the name of the pin function specified */
331 static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev,
332                                                 unsigned selector)
333 {
334         struct samsung_pinctrl_drv_data *drvdata;
335
336         drvdata = pinctrl_dev_get_drvdata(pctldev);
337         return drvdata->pmx_functions[selector].name;
338 }
339
340 /* return the groups associated for the specified function selector */
341 static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev,
342                 unsigned selector, const char * const **groups,
343                 unsigned * const num_groups)
344 {
345         struct samsung_pinctrl_drv_data *drvdata;
346
347         drvdata = pinctrl_dev_get_drvdata(pctldev);
348         *groups = drvdata->pmx_functions[selector].groups;
349         *num_groups = drvdata->pmx_functions[selector].num_groups;
350         return 0;
351 }
352
353 /*
354  * given a pin number that is local to a pin controller, find out the pin bank
355  * and the register base of the pin bank.
356  */
357 static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata,
358                         unsigned pin, void __iomem **reg, u32 *offset,
359                         struct samsung_pin_bank **bank)
360 {
361         struct samsung_pin_bank *b;
362
363         b = drvdata->pin_banks;
364
365         while ((pin >= b->pin_base) &&
366                         ((b->pin_base + b->nr_pins - 1) < pin))
367                 b++;
368
369         *reg = b->pctl_base + b->pctl_offset;
370         *offset = pin - b->pin_base;
371         if (bank)
372                 *bank = b;
373 }
374
375 /* enable or disable a pinmux function */
376 static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
377                                         unsigned group)
378 {
379         struct samsung_pinctrl_drv_data *drvdata;
380         const struct samsung_pin_bank_type *type;
381         struct samsung_pin_bank *bank;
382         void __iomem *reg;
383         u32 mask, shift, data, pin_offset;
384         unsigned long flags;
385         const struct samsung_pmx_func *func;
386         const struct samsung_pin_group *grp;
387
388         drvdata = pinctrl_dev_get_drvdata(pctldev);
389         func = &drvdata->pmx_functions[selector];
390         grp = &drvdata->pin_groups[group];
391
392         pin_to_reg_bank(drvdata, grp->pins[0] - drvdata->pin_base,
393                         &reg, &pin_offset, &bank);
394         type = bank->type;
395         mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
396         shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
397         if (shift >= 32) {
398                 /* Some banks have two config registers */
399                 shift -= 32;
400                 reg += 4;
401         }
402
403         raw_spin_lock_irqsave(&bank->slock, flags);
404
405         data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
406         data &= ~(mask << shift);
407         data |= func->val << shift;
408         writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);
409
410         raw_spin_unlock_irqrestore(&bank->slock, flags);
411 }
412
413 /* enable a specified pinmux by writing to registers */
414 static int samsung_pinmux_set_mux(struct pinctrl_dev *pctldev,
415                                   unsigned selector,
416                                   unsigned group)
417 {
418         samsung_pinmux_setup(pctldev, selector, group);
419         return 0;
420 }
421
422 /* list of pinmux callbacks for the pinmux vertical in pinctrl core */
423 static const struct pinmux_ops samsung_pinmux_ops = {
424         .get_functions_count    = samsung_get_functions_count,
425         .get_function_name      = samsung_pinmux_get_fname,
426         .get_function_groups    = samsung_pinmux_get_groups,
427         .set_mux                = samsung_pinmux_set_mux,
428 };
429
430 /* set or get the pin config settings for a specified pin */
431 static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin,
432                                 unsigned long *config, bool set)
433 {
434         struct samsung_pinctrl_drv_data *drvdata;
435         const struct samsung_pin_bank_type *type;
436         struct samsung_pin_bank *bank;
437         void __iomem *reg_base;
438         enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config);
439         u32 data, width, pin_offset, mask, shift;
440         u32 cfg_value, cfg_reg;
441         unsigned long flags;
442
443         drvdata = pinctrl_dev_get_drvdata(pctldev);
444         pin_to_reg_bank(drvdata, pin - drvdata->pin_base, &reg_base,
445                                         &pin_offset, &bank);
446         type = bank->type;
447
448         if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type])
449                 return -EINVAL;
450
451         width = type->fld_width[cfg_type];
452         cfg_reg = type->reg_offset[cfg_type];
453
454         raw_spin_lock_irqsave(&bank->slock, flags);
455
456         mask = (1 << width) - 1;
457         shift = pin_offset * width;
458         data = readl(reg_base + cfg_reg);
459
460         if (set) {
461                 cfg_value = PINCFG_UNPACK_VALUE(*config);
462                 data &= ~(mask << shift);
463                 data |= (cfg_value << shift);
464                 writel(data, reg_base + cfg_reg);
465         } else {
466                 data >>= shift;
467                 data &= mask;
468                 *config = PINCFG_PACK(cfg_type, data);
469         }
470
471         raw_spin_unlock_irqrestore(&bank->slock, flags);
472
473         return 0;
474 }
475
476 /* set the pin config settings for a specified pin */
477 static int samsung_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
478                                 unsigned long *configs, unsigned num_configs)
479 {
480         int i, ret;
481
482         for (i = 0; i < num_configs; i++) {
483                 ret = samsung_pinconf_rw(pctldev, pin, &configs[i], true);
484                 if (ret < 0)
485                         return ret;
486         } /* for each config */
487
488         return 0;
489 }
490
491 /* get the pin config settings for a specified pin */
492 static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
493                                         unsigned long *config)
494 {
495         return samsung_pinconf_rw(pctldev, pin, config, false);
496 }
497
498 /* set the pin config settings for a specified pin group */
499 static int samsung_pinconf_group_set(struct pinctrl_dev *pctldev,
500                         unsigned group, unsigned long *configs,
501                         unsigned num_configs)
502 {
503         struct samsung_pinctrl_drv_data *drvdata;
504         const unsigned int *pins;
505         unsigned int cnt;
506
507         drvdata = pinctrl_dev_get_drvdata(pctldev);
508         pins = drvdata->pin_groups[group].pins;
509
510         for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++)
511                 samsung_pinconf_set(pctldev, pins[cnt], configs, num_configs);
512
513         return 0;
514 }
515
516 /* get the pin config settings for a specified pin group */
517 static int samsung_pinconf_group_get(struct pinctrl_dev *pctldev,
518                                 unsigned int group, unsigned long *config)
519 {
520         struct samsung_pinctrl_drv_data *drvdata;
521         const unsigned int *pins;
522
523         drvdata = pinctrl_dev_get_drvdata(pctldev);
524         pins = drvdata->pin_groups[group].pins;
525         samsung_pinconf_get(pctldev, pins[0], config);
526         return 0;
527 }
528
529 /* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */
530 static const struct pinconf_ops samsung_pinconf_ops = {
531         .pin_config_get         = samsung_pinconf_get,
532         .pin_config_set         = samsung_pinconf_set,
533         .pin_config_group_get   = samsung_pinconf_group_get,
534         .pin_config_group_set   = samsung_pinconf_group_set,
535 };
536
537 /*
538  * The samsung_gpio_set_vlaue() should be called with "bank->slock" held
539  * to avoid race condition.
540  */
541 static void samsung_gpio_set_value(struct gpio_chip *gc,
542                                           unsigned offset, int value)
543 {
544         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
545         const struct samsung_pin_bank_type *type = bank->type;
546         void __iomem *reg;
547         u32 data;
548
549         reg = bank->pctl_base + bank->pctl_offset;
550
551         data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
552         data &= ~(1 << offset);
553         if (value)
554                 data |= 1 << offset;
555         writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]);
556 }
557
558 /* gpiolib gpio_set callback function */
559 static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
560 {
561         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
562         unsigned long flags;
563
564         raw_spin_lock_irqsave(&bank->slock, flags);
565         samsung_gpio_set_value(gc, offset, value);
566         raw_spin_unlock_irqrestore(&bank->slock, flags);
567 }
568
569 /* gpiolib gpio_get callback function */
570 static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset)
571 {
572         void __iomem *reg;
573         u32 data;
574         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
575         const struct samsung_pin_bank_type *type = bank->type;
576
577         reg = bank->pctl_base + bank->pctl_offset;
578
579         data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
580         data >>= offset;
581         data &= 1;
582         return data;
583 }
584
585 /*
586  * The samsung_gpio_set_direction() should be called with "bank->slock" held
587  * to avoid race condition.
588  * The calls to gpio_direction_output() and gpio_direction_input()
589  * leads to this function call.
590  */
591 static int samsung_gpio_set_direction(struct gpio_chip *gc,
592                                              unsigned offset, bool input)
593 {
594         const struct samsung_pin_bank_type *type;
595         struct samsung_pin_bank *bank;
596         void __iomem *reg;
597         u32 data, mask, shift;
598
599         bank = gpiochip_get_data(gc);
600         type = bank->type;
601
602         reg = bank->pctl_base + bank->pctl_offset
603                         + type->reg_offset[PINCFG_TYPE_FUNC];
604
605         mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
606         shift = offset * type->fld_width[PINCFG_TYPE_FUNC];
607         if (shift >= 32) {
608                 /* Some banks have two config registers */
609                 shift -= 32;
610                 reg += 4;
611         }
612
613         data = readl(reg);
614         data &= ~(mask << shift);
615         if (!input)
616                 data |= EXYNOS_PIN_FUNC_OUTPUT << shift;
617         writel(data, reg);
618
619         return 0;
620 }
621
622 /* gpiolib gpio_direction_input callback function. */
623 static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
624 {
625         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
626         unsigned long flags;
627         int ret;
628
629         raw_spin_lock_irqsave(&bank->slock, flags);
630         ret = samsung_gpio_set_direction(gc, offset, true);
631         raw_spin_unlock_irqrestore(&bank->slock, flags);
632         return ret;
633 }
634
635 /* gpiolib gpio_direction_output callback function. */
636 static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
637                                                         int value)
638 {
639         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
640         unsigned long flags;
641         int ret;
642
643         raw_spin_lock_irqsave(&bank->slock, flags);
644         samsung_gpio_set_value(gc, offset, value);
645         ret = samsung_gpio_set_direction(gc, offset, false);
646         raw_spin_unlock_irqrestore(&bank->slock, flags);
647
648         return ret;
649 }
650
651 /*
652  * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
653  * and a virtual IRQ, if not already present.
654  */
655 static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
656 {
657         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
658         unsigned int virq;
659
660         if (!bank->irq_domain)
661                 return -ENXIO;
662
663         virq = irq_create_mapping(bank->irq_domain, offset);
664
665         return (virq) ? : -ENXIO;
666 }
667
668 static struct samsung_pin_group *samsung_pinctrl_create_groups(
669                                 struct device *dev,
670                                 struct samsung_pinctrl_drv_data *drvdata,
671                                 unsigned int *cnt)
672 {
673         struct pinctrl_desc *ctrldesc = &drvdata->pctl;
674         struct samsung_pin_group *groups, *grp;
675         const struct pinctrl_pin_desc *pdesc;
676         int i;
677
678         groups = devm_kcalloc(dev, ctrldesc->npins, sizeof(*groups),
679                                 GFP_KERNEL);
680         if (!groups)
681                 return ERR_PTR(-EINVAL);
682         grp = groups;
683
684         pdesc = ctrldesc->pins;
685         for (i = 0; i < ctrldesc->npins; ++i, ++pdesc, ++grp) {
686                 grp->name = pdesc->name;
687                 grp->pins = &pdesc->number;
688                 grp->num_pins = 1;
689         }
690
691         *cnt = ctrldesc->npins;
692         return groups;
693 }
694
695 static int samsung_pinctrl_create_function(struct device *dev,
696                                 struct samsung_pinctrl_drv_data *drvdata,
697                                 struct device_node *func_np,
698                                 struct samsung_pmx_func *func)
699 {
700         int npins;
701         int ret;
702         int i;
703
704         if (of_property_read_u32(func_np, "samsung,pin-function", &func->val))
705                 return 0;
706
707         npins = of_property_count_strings(func_np, "samsung,pins");
708         if (npins < 1) {
709                 dev_err(dev, "invalid pin list in %pOFn node", func_np);
710                 return -EINVAL;
711         }
712
713         func->name = func_np->full_name;
714
715         func->groups = devm_kcalloc(dev, npins, sizeof(char *), GFP_KERNEL);
716         if (!func->groups)
717                 return -ENOMEM;
718
719         for (i = 0; i < npins; ++i) {
720                 const char *gname;
721
722                 ret = of_property_read_string_index(func_np, "samsung,pins",
723                                                         i, &gname);
724                 if (ret) {
725                         dev_err(dev,
726                                 "failed to read pin name %d from %pOFn node\n",
727                                 i, func_np);
728                         return ret;
729                 }
730
731                 func->groups[i] = gname;
732         }
733
734         func->num_groups = npins;
735         return 1;
736 }
737
738 static struct samsung_pmx_func *samsung_pinctrl_create_functions(
739                                 struct device *dev,
740                                 struct samsung_pinctrl_drv_data *drvdata,
741                                 unsigned int *cnt)
742 {
743         struct samsung_pmx_func *functions, *func;
744         struct device_node *dev_np = dev->of_node;
745         struct device_node *cfg_np;
746         unsigned int func_cnt = 0;
747         int ret;
748
749         /*
750          * Iterate over all the child nodes of the pin controller node
751          * and create pin groups and pin function lists.
752          */
753         for_each_child_of_node(dev_np, cfg_np) {
754                 struct device_node *func_np;
755
756                 if (!of_get_child_count(cfg_np)) {
757                         if (!of_find_property(cfg_np,
758                             "samsung,pin-function", NULL))
759                                 continue;
760                         ++func_cnt;
761                         continue;
762                 }
763
764                 for_each_child_of_node(cfg_np, func_np) {
765                         if (!of_find_property(func_np,
766                             "samsung,pin-function", NULL))
767                                 continue;
768                         ++func_cnt;
769                 }
770         }
771
772         functions = devm_kcalloc(dev, func_cnt, sizeof(*functions),
773                                         GFP_KERNEL);
774         if (!functions)
775                 return ERR_PTR(-ENOMEM);
776         func = functions;
777
778         /*
779          * Iterate over all the child nodes of the pin controller node
780          * and create pin groups and pin function lists.
781          */
782         func_cnt = 0;
783         for_each_child_of_node(dev_np, cfg_np) {
784                 struct device_node *func_np;
785
786                 if (!of_get_child_count(cfg_np)) {
787                         ret = samsung_pinctrl_create_function(dev, drvdata,
788                                                         cfg_np, func);
789                         if (ret < 0) {
790                                 of_node_put(cfg_np);
791                                 return ERR_PTR(ret);
792                         }
793                         if (ret > 0) {
794                                 ++func;
795                                 ++func_cnt;
796                         }
797                         continue;
798                 }
799
800                 for_each_child_of_node(cfg_np, func_np) {
801                         ret = samsung_pinctrl_create_function(dev, drvdata,
802                                                 func_np, func);
803                         if (ret < 0) {
804                                 of_node_put(func_np);
805                                 of_node_put(cfg_np);
806                                 return ERR_PTR(ret);
807                         }
808                         if (ret > 0) {
809                                 ++func;
810                                 ++func_cnt;
811                         }
812                 }
813         }
814
815         *cnt = func_cnt;
816         return functions;
817 }
818
819 /*
820  * Parse the information about all the available pin groups and pin functions
821  * from device node of the pin-controller. A pin group is formed with all
822  * the pins listed in the "samsung,pins" property.
823  */
824
825 static int samsung_pinctrl_parse_dt(struct platform_device *pdev,
826                                     struct samsung_pinctrl_drv_data *drvdata)
827 {
828         struct device *dev = &pdev->dev;
829         struct samsung_pin_group *groups;
830         struct samsung_pmx_func *functions;
831         unsigned int grp_cnt = 0, func_cnt = 0;
832
833         groups = samsung_pinctrl_create_groups(dev, drvdata, &grp_cnt);
834         if (IS_ERR(groups)) {
835                 dev_err(dev, "failed to parse pin groups\n");
836                 return PTR_ERR(groups);
837         }
838
839         functions = samsung_pinctrl_create_functions(dev, drvdata, &func_cnt);
840         if (IS_ERR(functions)) {
841                 dev_err(dev, "failed to parse pin functions\n");
842                 return PTR_ERR(functions);
843         }
844
845         drvdata->pin_groups = groups;
846         drvdata->nr_groups = grp_cnt;
847         drvdata->pmx_functions = functions;
848         drvdata->nr_functions = func_cnt;
849
850         return 0;
851 }
852
853 /* register the pinctrl interface with the pinctrl subsystem */
854 static int samsung_pinctrl_register(struct platform_device *pdev,
855                                     struct samsung_pinctrl_drv_data *drvdata)
856 {
857         struct pinctrl_desc *ctrldesc = &drvdata->pctl;
858         struct pinctrl_pin_desc *pindesc, *pdesc;
859         struct samsung_pin_bank *pin_bank;
860         char *pin_names;
861         int pin, bank, ret;
862
863         ctrldesc->name = "samsung-pinctrl";
864         ctrldesc->owner = THIS_MODULE;
865         ctrldesc->pctlops = &samsung_pctrl_ops;
866         ctrldesc->pmxops = &samsung_pinmux_ops;
867         ctrldesc->confops = &samsung_pinconf_ops;
868
869         pindesc = devm_kcalloc(&pdev->dev,
870                                drvdata->nr_pins, sizeof(*pindesc),
871                                GFP_KERNEL);
872         if (!pindesc)
873                 return -ENOMEM;
874         ctrldesc->pins = pindesc;
875         ctrldesc->npins = drvdata->nr_pins;
876
877         /* dynamically populate the pin number and pin name for pindesc */
878         for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++)
879                 pdesc->number = pin + drvdata->pin_base;
880
881         /*
882          * allocate space for storing the dynamically generated names for all
883          * the pins which belong to this pin-controller.
884          */
885         pin_names = devm_kzalloc(&pdev->dev,
886                                  array3_size(sizeof(char), PIN_NAME_LENGTH,
887                                              drvdata->nr_pins),
888                                  GFP_KERNEL);
889         if (!pin_names)
890                 return -ENOMEM;
891
892         /* for each pin, the name of the pin is pin-bank name + pin number */
893         for (bank = 0; bank < drvdata->nr_banks; bank++) {
894                 pin_bank = &drvdata->pin_banks[bank];
895                 for (pin = 0; pin < pin_bank->nr_pins; pin++) {
896                         sprintf(pin_names, "%s-%d", pin_bank->name, pin);
897                         pdesc = pindesc + pin_bank->pin_base + pin;
898                         pdesc->name = pin_names;
899                         pin_names += PIN_NAME_LENGTH;
900                 }
901         }
902
903         ret = samsung_pinctrl_parse_dt(pdev, drvdata);
904         if (ret)
905                 return ret;
906
907         drvdata->pctl_dev = devm_pinctrl_register(&pdev->dev, ctrldesc,
908                                                   drvdata);
909         if (IS_ERR(drvdata->pctl_dev)) {
910                 dev_err(&pdev->dev, "could not register pinctrl driver\n");
911                 return PTR_ERR(drvdata->pctl_dev);
912         }
913
914         for (bank = 0; bank < drvdata->nr_banks; ++bank) {
915                 pin_bank = &drvdata->pin_banks[bank];
916                 pin_bank->grange.name = pin_bank->name;
917                 pin_bank->grange.id = bank;
918                 pin_bank->grange.pin_base = drvdata->pin_base
919                                                 + pin_bank->pin_base;
920                 pin_bank->grange.base = pin_bank->grange.pin_base;
921                 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
922                 pin_bank->grange.gc = &pin_bank->gpio_chip;
923                 pinctrl_add_gpio_range(drvdata->pctl_dev, &pin_bank->grange);
924         }
925
926         return 0;
927 }
928
929 /* unregister the pinctrl interface with the pinctrl subsystem */
930 static int samsung_pinctrl_unregister(struct platform_device *pdev,
931                                       struct samsung_pinctrl_drv_data *drvdata)
932 {
933         struct samsung_pin_bank *bank = drvdata->pin_banks;
934         int i;
935
936         for (i = 0; i < drvdata->nr_banks; ++i, ++bank)
937                 pinctrl_remove_gpio_range(drvdata->pctl_dev, &bank->grange);
938
939         return 0;
940 }
941
942 static const struct gpio_chip samsung_gpiolib_chip = {
943         .request = gpiochip_generic_request,
944         .free = gpiochip_generic_free,
945         .set = samsung_gpio_set,
946         .get = samsung_gpio_get,
947         .direction_input = samsung_gpio_direction_input,
948         .direction_output = samsung_gpio_direction_output,
949         .to_irq = samsung_gpio_to_irq,
950         .owner = THIS_MODULE,
951 };
952
953 /* register the gpiolib interface with the gpiolib subsystem */
954 static int samsung_gpiolib_register(struct platform_device *pdev,
955                                     struct samsung_pinctrl_drv_data *drvdata)
956 {
957         struct samsung_pin_bank *bank = drvdata->pin_banks;
958         struct gpio_chip *gc;
959         int ret;
960         int i;
961
962         for (i = 0; i < drvdata->nr_banks; ++i, ++bank) {
963                 bank->gpio_chip = samsung_gpiolib_chip;
964
965                 gc = &bank->gpio_chip;
966                 gc->base = bank->grange.base;
967                 gc->ngpio = bank->nr_pins;
968                 gc->parent = &pdev->dev;
969                 gc->of_node = bank->of_node;
970                 gc->label = bank->name;
971
972                 ret = devm_gpiochip_add_data(&pdev->dev, gc, bank);
973                 if (ret) {
974                         dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
975                                                         gc->label, ret);
976                         return ret;
977                 }
978         }
979
980         return 0;
981 }
982
983 static const struct samsung_pin_ctrl *
984 samsung_pinctrl_get_soc_data_for_of_alias(struct platform_device *pdev)
985 {
986         struct device_node *node = pdev->dev.of_node;
987         const struct samsung_pinctrl_of_match_data *of_data;
988         int id;
989
990         id = of_alias_get_id(node, "pinctrl");
991         if (id < 0) {
992                 dev_err(&pdev->dev, "failed to get alias id\n");
993                 return NULL;
994         }
995
996         of_data = of_device_get_match_data(&pdev->dev);
997         if (id >= of_data->num_ctrl) {
998                 dev_err(&pdev->dev, "invalid alias id %d\n", id);
999                 return NULL;
1000         }
1001
1002         return &(of_data->ctrl[id]);
1003 }
1004
1005 /* retrieve the soc specific data */
1006 static const struct samsung_pin_ctrl *
1007 samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d,
1008                              struct platform_device *pdev)
1009 {
1010         struct device_node *node = pdev->dev.of_node;
1011         struct device_node *np;
1012         const struct samsung_pin_bank_data *bdata;
1013         const struct samsung_pin_ctrl *ctrl;
1014         struct samsung_pin_bank *bank;
1015         struct resource *res;
1016         void __iomem *virt_base[SAMSUNG_PINCTRL_NUM_RESOURCES];
1017         unsigned int i;
1018
1019         ctrl = samsung_pinctrl_get_soc_data_for_of_alias(pdev);
1020         if (!ctrl)
1021                 return ERR_PTR(-ENOENT);
1022
1023         d->suspend = ctrl->suspend;
1024         d->resume = ctrl->resume;
1025         d->nr_banks = ctrl->nr_banks;
1026         d->pin_banks = devm_kcalloc(&pdev->dev, d->nr_banks,
1027                                         sizeof(*d->pin_banks), GFP_KERNEL);
1028         if (!d->pin_banks)
1029                 return ERR_PTR(-ENOMEM);
1030
1031         if (ctrl->nr_ext_resources + 1 > SAMSUNG_PINCTRL_NUM_RESOURCES)
1032                 return ERR_PTR(-EINVAL);
1033
1034         for (i = 0; i < ctrl->nr_ext_resources + 1; i++) {
1035                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
1036                 if (!res) {
1037                         dev_err(&pdev->dev, "failed to get mem%d resource\n", i);
1038                         return ERR_PTR(-EINVAL);
1039                 }
1040                 virt_base[i] = devm_ioremap(&pdev->dev, res->start,
1041                                                 resource_size(res));
1042                 if (!virt_base[i]) {
1043                         dev_err(&pdev->dev, "failed to ioremap %pR\n", res);
1044                         return ERR_PTR(-EIO);
1045                 }
1046         }
1047
1048         bank = d->pin_banks;
1049         bdata = ctrl->pin_banks;
1050         for (i = 0; i < ctrl->nr_banks; ++i, ++bdata, ++bank) {
1051                 bank->type = bdata->type;
1052                 bank->pctl_offset = bdata->pctl_offset;
1053                 bank->nr_pins = bdata->nr_pins;
1054                 bank->eint_func = bdata->eint_func;
1055                 bank->eint_type = bdata->eint_type;
1056                 bank->eint_mask = bdata->eint_mask;
1057                 bank->eint_offset = bdata->eint_offset;
1058                 bank->name = bdata->name;
1059
1060                 raw_spin_lock_init(&bank->slock);
1061                 bank->drvdata = d;
1062                 bank->pin_base = d->nr_pins;
1063                 d->nr_pins += bank->nr_pins;
1064
1065                 bank->eint_base = virt_base[0];
1066                 bank->pctl_base = virt_base[bdata->pctl_res_idx];
1067         }
1068         /*
1069          * Legacy platforms should provide only one resource with IO memory.
1070          * Store it as virt_base because legacy driver needs to access it
1071          * through samsung_pinctrl_drv_data.
1072          */
1073         d->virt_base = virt_base[0];
1074
1075         for_each_child_of_node(node, np) {
1076                 if (!of_find_property(np, "gpio-controller", NULL))
1077                         continue;
1078                 bank = d->pin_banks;
1079                 for (i = 0; i < d->nr_banks; ++i, ++bank) {
1080                         if (of_node_name_eq(np, bank->name)) {
1081                                 bank->of_node = np;
1082                                 break;
1083                         }
1084                 }
1085         }
1086
1087         d->pin_base = pin_base;
1088         pin_base += d->nr_pins;
1089
1090         return ctrl;
1091 }
1092
1093 static int samsung_pinctrl_probe(struct platform_device *pdev)
1094 {
1095         struct samsung_pinctrl_drv_data *drvdata;
1096         const struct samsung_pin_ctrl *ctrl;
1097         struct device *dev = &pdev->dev;
1098         struct resource *res;
1099         int ret;
1100
1101         drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
1102         if (!drvdata)
1103                 return -ENOMEM;
1104
1105         ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev);
1106         if (IS_ERR(ctrl)) {
1107                 dev_err(&pdev->dev, "driver data not available\n");
1108                 return PTR_ERR(ctrl);
1109         }
1110         drvdata->dev = dev;
1111
1112         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1113         if (res)
1114                 drvdata->irq = res->start;
1115
1116         if (ctrl->retention_data) {
1117                 drvdata->retention_ctrl = ctrl->retention_data->init(drvdata,
1118                                                           ctrl->retention_data);
1119                 if (IS_ERR(drvdata->retention_ctrl))
1120                         return PTR_ERR(drvdata->retention_ctrl);
1121         }
1122
1123         ret = samsung_pinctrl_register(pdev, drvdata);
1124         if (ret)
1125                 return ret;
1126
1127         ret = samsung_gpiolib_register(pdev, drvdata);
1128         if (ret) {
1129                 samsung_pinctrl_unregister(pdev, drvdata);
1130                 return ret;
1131         }
1132
1133         if (ctrl->eint_gpio_init)
1134                 ctrl->eint_gpio_init(drvdata);
1135         if (ctrl->eint_wkup_init)
1136                 ctrl->eint_wkup_init(drvdata);
1137
1138         platform_set_drvdata(pdev, drvdata);
1139
1140         return 0;
1141 }
1142
1143 /*
1144  * samsung_pinctrl_suspend - save pinctrl state for suspend
1145  *
1146  * Save data for all banks handled by this device.
1147  */
1148 static int __maybe_unused samsung_pinctrl_suspend(struct device *dev)
1149 {
1150         struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
1151         int i;
1152
1153         for (i = 0; i < drvdata->nr_banks; i++) {
1154                 struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
1155                 void __iomem *reg = bank->pctl_base + bank->pctl_offset;
1156                 const u8 *offs = bank->type->reg_offset;
1157                 const u8 *widths = bank->type->fld_width;
1158                 enum pincfg_type type;
1159
1160                 /* Registers without a powerdown config aren't lost */
1161                 if (!widths[PINCFG_TYPE_CON_PDN])
1162                         continue;
1163
1164                 for (type = 0; type < PINCFG_TYPE_NUM; type++)
1165                         if (widths[type])
1166                                 bank->pm_save[type] = readl(reg + offs[type]);
1167
1168                 if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
1169                         /* Some banks have two config registers */
1170                         bank->pm_save[PINCFG_TYPE_NUM] =
1171                                 readl(reg + offs[PINCFG_TYPE_FUNC] + 4);
1172                         pr_debug("Save %s @ %p (con %#010x %08x)\n",
1173                                  bank->name, reg,
1174                                  bank->pm_save[PINCFG_TYPE_FUNC],
1175                                  bank->pm_save[PINCFG_TYPE_NUM]);
1176                 } else {
1177                         pr_debug("Save %s @ %p (con %#010x)\n", bank->name,
1178                                  reg, bank->pm_save[PINCFG_TYPE_FUNC]);
1179                 }
1180         }
1181
1182         if (drvdata->suspend)
1183                 drvdata->suspend(drvdata);
1184         if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable)
1185                 drvdata->retention_ctrl->enable(drvdata);
1186
1187         return 0;
1188 }
1189
1190 /*
1191  * samsung_pinctrl_resume - restore pinctrl state from suspend
1192  *
1193  * Restore one of the banks that was saved during suspend.
1194  *
1195  * We don't bother doing anything complicated to avoid glitching lines since
1196  * we're called before pad retention is turned off.
1197  */
1198 static int __maybe_unused samsung_pinctrl_resume(struct device *dev)
1199 {
1200         struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
1201         int i;
1202
1203         if (drvdata->resume)
1204                 drvdata->resume(drvdata);
1205
1206         for (i = 0; i < drvdata->nr_banks; i++) {
1207                 struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
1208                 void __iomem *reg = bank->pctl_base + bank->pctl_offset;
1209                 const u8 *offs = bank->type->reg_offset;
1210                 const u8 *widths = bank->type->fld_width;
1211                 enum pincfg_type type;
1212
1213                 /* Registers without a powerdown config aren't lost */
1214                 if (!widths[PINCFG_TYPE_CON_PDN])
1215                         continue;
1216
1217                 if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
1218                         /* Some banks have two config registers */
1219                         pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n",
1220                                  bank->name, reg,
1221                                  readl(reg + offs[PINCFG_TYPE_FUNC]),
1222                                  readl(reg + offs[PINCFG_TYPE_FUNC] + 4),
1223                                  bank->pm_save[PINCFG_TYPE_FUNC],
1224                                  bank->pm_save[PINCFG_TYPE_NUM]);
1225                         writel(bank->pm_save[PINCFG_TYPE_NUM],
1226                                reg + offs[PINCFG_TYPE_FUNC] + 4);
1227                 } else {
1228                         pr_debug("%s @ %p (con %#010x => %#010x)\n", bank->name,
1229                                  reg, readl(reg + offs[PINCFG_TYPE_FUNC]),
1230                                  bank->pm_save[PINCFG_TYPE_FUNC]);
1231                 }
1232                 for (type = 0; type < PINCFG_TYPE_NUM; type++)
1233                         if (widths[type])
1234                                 writel(bank->pm_save[type], reg + offs[type]);
1235         }
1236
1237         if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable)
1238                 drvdata->retention_ctrl->disable(drvdata);
1239
1240         return 0;
1241 }
1242
1243 static const struct of_device_id samsung_pinctrl_dt_match[] = {
1244 #ifdef CONFIG_PINCTRL_EXYNOS_ARM
1245         { .compatible = "samsung,exynos3250-pinctrl",
1246                 .data = &exynos3250_of_data },
1247         { .compatible = "samsung,exynos4210-pinctrl",
1248                 .data = &exynos4210_of_data },
1249         { .compatible = "samsung,exynos4x12-pinctrl",
1250                 .data = &exynos4x12_of_data },
1251         { .compatible = "samsung,exynos5250-pinctrl",
1252                 .data = &exynos5250_of_data },
1253         { .compatible = "samsung,exynos5260-pinctrl",
1254                 .data = &exynos5260_of_data },
1255         { .compatible = "samsung,exynos5410-pinctrl",
1256                 .data = &exynos5410_of_data },
1257         { .compatible = "samsung,exynos5420-pinctrl",
1258                 .data = &exynos5420_of_data },
1259         { .compatible = "samsung,s5pv210-pinctrl",
1260                 .data = &s5pv210_of_data },
1261 #endif
1262 #ifdef CONFIG_PINCTRL_EXYNOS_ARM64
1263         { .compatible = "samsung,exynos5433-pinctrl",
1264                 .data = &exynos5433_of_data },
1265         { .compatible = "samsung,exynos7-pinctrl",
1266                 .data = &exynos7_of_data },
1267 #endif
1268 #ifdef CONFIG_PINCTRL_S3C64XX
1269         { .compatible = "samsung,s3c64xx-pinctrl",
1270                 .data = &s3c64xx_of_data },
1271 #endif
1272 #ifdef CONFIG_PINCTRL_S3C24XX
1273         { .compatible = "samsung,s3c2412-pinctrl",
1274                 .data = &s3c2412_of_data },
1275         { .compatible = "samsung,s3c2416-pinctrl",
1276                 .data = &s3c2416_of_data },
1277         { .compatible = "samsung,s3c2440-pinctrl",
1278                 .data = &s3c2440_of_data },
1279         { .compatible = "samsung,s3c2450-pinctrl",
1280                 .data = &s3c2450_of_data },
1281 #endif
1282         {},
1283 };
1284
1285 static const struct dev_pm_ops samsung_pinctrl_pm_ops = {
1286         SET_LATE_SYSTEM_SLEEP_PM_OPS(samsung_pinctrl_suspend,
1287                                      samsung_pinctrl_resume)
1288 };
1289
1290 static struct platform_driver samsung_pinctrl_driver = {
1291         .probe          = samsung_pinctrl_probe,
1292         .driver = {
1293                 .name   = "samsung-pinctrl",
1294                 .of_match_table = samsung_pinctrl_dt_match,
1295                 .suppress_bind_attrs = true,
1296                 .pm = &samsung_pinctrl_pm_ops,
1297         },
1298 };
1299
1300 static int __init samsung_pinctrl_drv_register(void)
1301 {
1302         return platform_driver_register(&samsung_pinctrl_driver);
1303 }
1304 postcore_initcall(samsung_pinctrl_drv_register);