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.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                         return ret;
 276                 }
 277         }
 278
 279         return 0;
 280 }
 281
 282 /* list of pinctrl callbacks for the pinctrl core */
 283 static const struct pinctrl_ops samsung_pctrl_ops = {
 284         .get_groups_count       = samsung_get_group_count,
 285         .get_group_name         = samsung_get_group_name,
 286         .get_group_pins         = samsung_get_group_pins,
 287         .dt_node_to_map         = samsung_dt_node_to_map,
 288         .dt_free_map            = samsung_dt_free_map,
 289 };
 290
 291 /* check if the selector is a valid pin function selector */
 292 static int samsung_get_functions_count(struct pinctrl_dev *pctldev)
 293 {
 294         struct samsung_pinctrl_drv_data *drvdata;
 295
 296         drvdata = pinctrl_dev_get_drvdata(pctldev);
 297         return drvdata->nr_functions;
 298 }
 299
 300 /* return the name of the pin function specified */
 301 static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev,
 302                                                 unsigned selector)
 303 {
 304         struct samsung_pinctrl_drv_data *drvdata;
 305
 306         drvdata = pinctrl_dev_get_drvdata(pctldev);
 307         return drvdata->pmx_functions[selector].name;
 308 }
 309
 310 /* return the groups associated for the specified function selector */
 311 static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev,
 312                 unsigned selector, const char * const **groups,
 313                 unsigned * const num_groups)
 314 {
 315         struct samsung_pinctrl_drv_data *drvdata;
 316
 317         drvdata = pinctrl_dev_get_drvdata(pctldev);
 318         *groups = drvdata->pmx_functions[selector].groups;
 319         *num_groups = drvdata->pmx_functions[selector].num_groups;
 320         return 0;
 321 }
 322
 323 /*
 324  * given a pin number that is local to a pin controller, find out the pin bank
 325  * and the register base of the pin bank.
 326  */
 327 static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata,
 328                         unsigned pin, void __iomem **reg, u32 *offset,
 329                         struct samsung_pin_bank **bank)
 330 {
 331         struct samsung_pin_bank *b;
 332
 333         b = drvdata->pin_banks;
 334
 335         while ((pin >= b->pin_base) &&
 336                         ((b->pin_base + b->nr_pins - 1) < pin))
 337                 b++;
 338
 339         *reg = b->pctl_base + b->pctl_offset;
 340         *offset = pin - b->pin_base;
 341         if (bank)
 342                 *bank = b;
 343 }
 344
 345 /* enable or disable a pinmux function */
 346 static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
 347                                         unsigned group)
 348 {
 349         struct samsung_pinctrl_drv_data *drvdata;
 350         const struct samsung_pin_bank_type *type;
 351         struct samsung_pin_bank *bank;
 352         void __iomem *reg;
 353         u32 mask, shift, data, pin_offset;
 354         unsigned long flags;
 355         const struct samsung_pmx_func *func;
 356         const struct samsung_pin_group *grp;
 357
 358         drvdata = pinctrl_dev_get_drvdata(pctldev);
 359         func = &drvdata->pmx_functions[selector];
 360         grp = &drvdata->pin_groups[group];
 361
 362         pin_to_reg_bank(drvdata, grp->pins[0] - drvdata->pin_base,
 363                         &reg, &pin_offset, &bank);
 364         type = bank->type;
 365         mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
 366         shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
 367         if (shift >= 32) {
 368                 /* Some banks have two config registers */
 369                 shift -= 32;
 370                 reg += 4;
 371         }
 372
 373         spin_lock_irqsave(&bank->slock, flags);
 374
 375         data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
 376         data &= ~(mask << shift);
 377         data |= func->val << shift;
 378         writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);
 379
 380         spin_unlock_irqrestore(&bank->slock, flags);
 381 }
 382
 383 /* enable a specified pinmux by writing to registers */
 384 static int samsung_pinmux_set_mux(struct pinctrl_dev *pctldev,
 385                                   unsigned selector,
 386                                   unsigned group)
 387 {
 388         samsung_pinmux_setup(pctldev, selector, group);
 389         return 0;
 390 }
 391
 392 /* list of pinmux callbacks for the pinmux vertical in pinctrl core */
 393 static const struct pinmux_ops samsung_pinmux_ops = {
 394         .get_functions_count    = samsung_get_functions_count,
 395         .get_function_name      = samsung_pinmux_get_fname,
 396         .get_function_groups    = samsung_pinmux_get_groups,
 397         .set_mux                = samsung_pinmux_set_mux,
 398 };
 399
 400 /* set or get the pin config settings for a specified pin */
 401 static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin,
 402                                 unsigned long *config, bool set)
 403 {
 404         struct samsung_pinctrl_drv_data *drvdata;
 405         const struct samsung_pin_bank_type *type;
 406         struct samsung_pin_bank *bank;
 407         void __iomem *reg_base;
 408         enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config);
 409         u32 data, width, pin_offset, mask, shift;
 410         u32 cfg_value, cfg_reg;
 411         unsigned long flags;
 412
 413         drvdata = pinctrl_dev_get_drvdata(pctldev);
 414         pin_to_reg_bank(drvdata, pin - drvdata->pin_base, &reg_base,
 415                                         &pin_offset, &bank);
 416         type = bank->type;
 417
 418         if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type])
 419                 return -EINVAL;
 420
 421         width = type->fld_width[cfg_type];
 422         cfg_reg = type->reg_offset[cfg_type];
 423
 424         spin_lock_irqsave(&bank->slock, flags);
 425
 426         mask = (1 << width) - 1;
 427         shift = pin_offset * width;
 428         data = readl(reg_base + cfg_reg);
 429
 430         if (set) {
 431                 cfg_value = PINCFG_UNPACK_VALUE(*config);
 432                 data &= ~(mask << shift);
 433                 data |= (cfg_value << shift);
 434                 writel(data, reg_base + cfg_reg);
 435         } else {
 436                 data >>= shift;
 437                 data &= mask;
 438                 *config = PINCFG_PACK(cfg_type, data);
 439         }
 440
 441         spin_unlock_irqrestore(&bank->slock, flags);
 442
 443         return 0;
 444 }
 445
 446 /* set the pin config settings for a specified pin */
 447 static int samsung_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 448                                 unsigned long *configs, unsigned num_configs)
 449 {
 450         int i, ret;
 451
 452         for (i = 0; i < num_configs; i++) {
 453                 ret = samsung_pinconf_rw(pctldev, pin, &configs[i], true);
 454                 if (ret < 0)
 455                         return ret;
 456         } /* for each config */
 457
 458         return 0;
 459 }
 460
 461 /* get the pin config settings for a specified pin */
 462 static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
 463                                         unsigned long *config)
 464 {
 465         return samsung_pinconf_rw(pctldev, pin, config, false);
 466 }
 467
 468 /* set the pin config settings for a specified pin group */
 469 static int samsung_pinconf_group_set(struct pinctrl_dev *pctldev,
 470                         unsigned group, unsigned long *configs,
 471                         unsigned num_configs)
 472 {
 473         struct samsung_pinctrl_drv_data *drvdata;
 474         const unsigned int *pins;
 475         unsigned int cnt;
 476
 477         drvdata = pinctrl_dev_get_drvdata(pctldev);
 478         pins = drvdata->pin_groups[group].pins;
 479
 480         for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++)
 481                 samsung_pinconf_set(pctldev, pins[cnt], configs, num_configs);
 482
 483         return 0;
 484 }
 485
 486 /* get the pin config settings for a specified pin group */
 487 static int samsung_pinconf_group_get(struct pinctrl_dev *pctldev,
 488                                 unsigned int group, unsigned long *config)
 489 {
 490         struct samsung_pinctrl_drv_data *drvdata;
 491         const unsigned int *pins;
 492
 493         drvdata = pinctrl_dev_get_drvdata(pctldev);
 494         pins = drvdata->pin_groups[group].pins;
 495         samsung_pinconf_get(pctldev, pins[0], config);
 496         return 0;
 497 }
 498
 499 /* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */
 500 static const struct pinconf_ops samsung_pinconf_ops = {
 501         .pin_config_get         = samsung_pinconf_get,
 502         .pin_config_set         = samsung_pinconf_set,
 503         .pin_config_group_get   = samsung_pinconf_group_get,
 504         .pin_config_group_set   = samsung_pinconf_group_set,
 505 };
 506
 507 /*
 508  * The samsung_gpio_set_vlaue() should be called with "bank->slock" held
 509  * to avoid race condition.
 510  */
 511 static void samsung_gpio_set_value(struct gpio_chip *gc,
 512                                           unsigned offset, int value)
 513 {
 514         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 515         const struct samsung_pin_bank_type *type = bank->type;
 516         void __iomem *reg;
 517         u32 data;
 518
 519         reg = bank->pctl_base + bank->pctl_offset;
 520
 521         data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
 522         data &= ~(1 << offset);
 523         if (value)
 524                 data |= 1 << offset;
 525         writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]);
 526 }
 527
 528 /* gpiolib gpio_set callback function */
 529 static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
 530 {
 531         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 532         unsigned long flags;
 533
 534         spin_lock_irqsave(&bank->slock, flags);
 535         samsung_gpio_set_value(gc, offset, value);
 536         spin_unlock_irqrestore(&bank->slock, flags);
 537 }
 538
 539 /* gpiolib gpio_get callback function */
 540 static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset)
 541 {
 542         void __iomem *reg;
 543         u32 data;
 544         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 545         const struct samsung_pin_bank_type *type = bank->type;
 546
 547         reg = bank->pctl_base + bank->pctl_offset;
 548
 549         data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
 550         data >>= offset;
 551         data &= 1;
 552         return data;
 553 }
 554
 555 /*
 556  * The samsung_gpio_set_direction() should be called with "bank->slock" held
 557  * to avoid race condition.
 558  * The calls to gpio_direction_output() and gpio_direction_input()
 559  * leads to this function call.
 560  */
 561 static int samsung_gpio_set_direction(struct gpio_chip *gc,
 562                                              unsigned offset, bool input)
 563 {
 564         const struct samsung_pin_bank_type *type;
 565         struct samsung_pin_bank *bank;
 566         void __iomem *reg;
 567         u32 data, mask, shift;
 568
 569         bank = gpiochip_get_data(gc);
 570         type = bank->type;
 571
 572         reg = bank->pctl_base + bank->pctl_offset
 573                         + type->reg_offset[PINCFG_TYPE_FUNC];
 574
 575         mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
 576         shift = offset * type->fld_width[PINCFG_TYPE_FUNC];
 577         if (shift >= 32) {
 578                 /* Some banks have two config registers */
 579                 shift -= 32;
 580                 reg += 4;
 581         }
 582
 583         data = readl(reg);
 584         data &= ~(mask << shift);
 585         if (!input)
 586                 data |= EXYNOS_PIN_FUNC_OUTPUT << shift;
 587         writel(data, reg);
 588
 589         return 0;
 590 }
 591
 592 /* gpiolib gpio_direction_input callback function. */
 593 static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
 594 {
 595         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 596         unsigned long flags;
 597         int ret;
 598
 599         spin_lock_irqsave(&bank->slock, flags);
 600         ret = samsung_gpio_set_direction(gc, offset, true);
 601         spin_unlock_irqrestore(&bank->slock, flags);
 602         return ret;
 603 }
 604
 605 /* gpiolib gpio_direction_output callback function. */
 606 static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
 607                                                         int value)
 608 {
 609         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 610         unsigned long flags;
 611         int ret;
 612
 613         spin_lock_irqsave(&bank->slock, flags);
 614         samsung_gpio_set_value(gc, offset, value);
 615         ret = samsung_gpio_set_direction(gc, offset, false);
 616         spin_unlock_irqrestore(&bank->slock, flags);
 617
 618         return ret;
 619 }
 620
 621 /*
 622  * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
 623  * and a virtual IRQ, if not already present.
 624  */
 625 static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
 626 {
 627         struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 628         unsigned int virq;
 629
 630         if (!bank->irq_domain)
 631                 return -ENXIO;
 632
 633         virq = irq_create_mapping(bank->irq_domain, offset);
 634
 635         return (virq) ? : -ENXIO;
 636 }
 637
 638 static struct samsung_pin_group *samsung_pinctrl_create_groups(
 639                                 struct device *dev,
 640                                 struct samsung_pinctrl_drv_data *drvdata,
 641                                 unsigned int *cnt)
 642 {
 643         struct pinctrl_desc *ctrldesc = &drvdata->pctl;
 644         struct samsung_pin_group *groups, *grp;
 645         const struct pinctrl_pin_desc *pdesc;
 646         int i;
 647
 648         groups = devm_kzalloc(dev, ctrldesc->npins * sizeof(*groups),
 649                                 GFP_KERNEL);
 650         if (!groups)
 651                 return ERR_PTR(-EINVAL);
 652         grp = groups;
 653
 654         pdesc = ctrldesc->pins;
 655         for (i = 0; i < ctrldesc->npins; ++i, ++pdesc, ++grp) {
 656                 grp->name = pdesc->name;
 657                 grp->pins = &pdesc->number;
 658                 grp->num_pins = 1;
 659         }
 660
 661         *cnt = ctrldesc->npins;
 662         return groups;
 663 }
 664
 665 static int samsung_pinctrl_create_function(struct device *dev,
 666                                 struct samsung_pinctrl_drv_data *drvdata,
 667                                 struct device_node *func_np,
 668                                 struct samsung_pmx_func *func)
 669 {
 670         int npins;
 671         int ret;
 672         int i;
 673
 674         if (of_property_read_u32(func_np, "samsung,pin-function", &func->val))
 675                 return 0;
 676
 677         npins = of_property_count_strings(func_np, "samsung,pins");
 678         if (npins < 1) {
 679                 dev_err(dev, "invalid pin list in %pOFn node", func_np);
 680                 return -EINVAL;
 681         }
 682
 683         func->name = func_np->full_name;
 684
 685         func->groups = devm_kzalloc(dev, npins * sizeof(char *), GFP_KERNEL);
 686         if (!func->groups)
 687                 return -ENOMEM;
 688
 689         for (i = 0; i < npins; ++i) {
 690                 const char *gname;
 691
 692                 ret = of_property_read_string_index(func_np, "samsung,pins",
 693                                                         i, &gname);
 694                 if (ret) {
 695                         dev_err(dev,
 696                                 "failed to read pin name %d from %pOFn node\n",
 697                                 i, func_np);
 698                         return ret;
 699                 }
 700
 701                 func->groups[i] = gname;
 702         }
 703
 704         func->num_groups = npins;
 705         return 1;
 706 }
 707
 708 static struct samsung_pmx_func *samsung_pinctrl_create_functions(
 709                                 struct device *dev,
 710                                 struct samsung_pinctrl_drv_data *drvdata,
 711                                 unsigned int *cnt)
 712 {
 713         struct samsung_pmx_func *functions, *func;
 714         struct device_node *dev_np = dev->of_node;
 715         struct device_node *cfg_np;
 716         unsigned int func_cnt = 0;
 717         int ret;
 718
 719         /*
 720          * Iterate over all the child nodes of the pin controller node
 721          * and create pin groups and pin function lists.
 722          */
 723         for_each_child_of_node(dev_np, cfg_np) {
 724                 struct device_node *func_np;
 725
 726                 if (!of_get_child_count(cfg_np)) {
 727                         if (!of_find_property(cfg_np,
 728                             "samsung,pin-function", NULL))
 729                                 continue;
 730                         ++func_cnt;
 731                         continue;
 732                 }
 733
 734                 for_each_child_of_node(cfg_np, func_np) {
 735                         if (!of_find_property(func_np,
 736                             "samsung,pin-function", NULL))
 737                                 continue;
 738                         ++func_cnt;
 739                 }
 740         }
 741
 742         functions = devm_kzalloc(dev, func_cnt * sizeof(*functions),
 743                                         GFP_KERNEL);
 744         if (!functions)
 745                 return ERR_PTR(-ENOMEM);
 746         func = functions;
 747
 748         /*
 749          * Iterate over all the child nodes of the pin controller node
 750          * and create pin groups and pin function lists.
 751          */
 752         func_cnt = 0;
 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                         ret = samsung_pinctrl_create_function(dev, drvdata,
 758                                                         cfg_np, func);
 759                         if (ret < 0)
 760                                 return ERR_PTR(ret);
 761                         if (ret > 0) {
 762                                 ++func;
 763                                 ++func_cnt;
 764                         }
 765                         continue;
 766                 }
 767
 768                 for_each_child_of_node(cfg_np, func_np) {
 769                         ret = samsung_pinctrl_create_function(dev, drvdata,
 770                                                 func_np, func);
 771                         if (ret < 0)
 772                                 return ERR_PTR(ret);
 773                         if (ret > 0) {
 774                                 ++func;
 775                                 ++func_cnt;
 776                         }
 777                 }
 778         }
 779
 780         *cnt = func_cnt;
 781         return functions;
 782 }
 783
 784 /*
 785  * Parse the information about all the available pin groups and pin functions
 786  * from device node of the pin-controller. A pin group is formed with all
 787  * the pins listed in the "samsung,pins" property.
 788  */
 789
 790 static int samsung_pinctrl_parse_dt(struct platform_device *pdev,
 791                                     struct samsung_pinctrl_drv_data *drvdata)
 792 {
 793         struct device *dev = &pdev->dev;
 794         struct samsung_pin_group *groups;
 795         struct samsung_pmx_func *functions;
 796         unsigned int grp_cnt = 0, func_cnt = 0;
 797
 798         groups = samsung_pinctrl_create_groups(dev, drvdata, &grp_cnt);
 799         if (IS_ERR(groups)) {
 800                 dev_err(dev, "failed to parse pin groups\n");
 801                 return PTR_ERR(groups);
 802         }
 803
 804         functions = samsung_pinctrl_create_functions(dev, drvdata, &func_cnt);
 805         if (IS_ERR(functions)) {
 806                 dev_err(dev, "failed to parse pin functions\n");
 807                 return PTR_ERR(functions);
 808         }
 809
 810         drvdata->pin_groups = groups;
 811         drvdata->nr_groups = grp_cnt;
 812         drvdata->pmx_functions = functions;
 813         drvdata->nr_functions = func_cnt;
 814
 815         return 0;
 816 }
 817
 818 /* register the pinctrl interface with the pinctrl subsystem */
 819 static int samsung_pinctrl_register(struct platform_device *pdev,
 820                                     struct samsung_pinctrl_drv_data *drvdata)
 821 {
 822         struct pinctrl_desc *ctrldesc = &drvdata->pctl;
 823         struct pinctrl_pin_desc *pindesc, *pdesc;
 824         struct samsung_pin_bank *pin_bank;
 825         char *pin_names;
 826         int pin, bank, ret;
 827
 828         ctrldesc->name = "samsung-pinctrl";
 829         ctrldesc->owner = THIS_MODULE;
 830         ctrldesc->pctlops = &samsung_pctrl_ops;
 831         ctrldesc->pmxops = &samsung_pinmux_ops;
 832         ctrldesc->confops = &samsung_pinconf_ops;
 833
 834         pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
 835                         drvdata->nr_pins, GFP_KERNEL);
 836         if (!pindesc)
 837                 return -ENOMEM;
 838         ctrldesc->pins = pindesc;
 839         ctrldesc->npins = drvdata->nr_pins;
 840
 841         /* dynamically populate the pin number and pin name for pindesc */
 842         for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++)
 843                 pdesc->number = pin + drvdata->pin_base;
 844
 845         /*
 846          * allocate space for storing the dynamically generated names for all
 847          * the pins which belong to this pin-controller.
 848          */
 849         pin_names = devm_kzalloc(&pdev->dev, sizeof(char) * PIN_NAME_LENGTH *
 850                                         drvdata->nr_pins, GFP_KERNEL);
 851         if (!pin_names)
 852                 return -ENOMEM;
 853
 854         /* for each pin, the name of the pin is pin-bank name + pin number */
 855         for (bank = 0; bank < drvdata->nr_banks; bank++) {
 856                 pin_bank = &drvdata->pin_banks[bank];
 857                 for (pin = 0; pin < pin_bank->nr_pins; pin++) {
 858                         sprintf(pin_names, "%s-%d", pin_bank->name, pin);
 859                         pdesc = pindesc + pin_bank->pin_base + pin;
 860                         pdesc->name = pin_names;
 861                         pin_names += PIN_NAME_LENGTH;
 862                 }
 863         }
 864
 865         ret = samsung_pinctrl_parse_dt(pdev, drvdata);
 866         if (ret)
 867                 return ret;
 868
 869         drvdata->pctl_dev = devm_pinctrl_register(&pdev->dev, ctrldesc,
 870                                                   drvdata);
 871         if (IS_ERR(drvdata->pctl_dev)) {
 872                 dev_err(&pdev->dev, "could not register pinctrl driver\n");
 873                 return PTR_ERR(drvdata->pctl_dev);
 874         }
 875
 876         for (bank = 0; bank < drvdata->nr_banks; ++bank) {
 877                 pin_bank = &drvdata->pin_banks[bank];
 878                 pin_bank->grange.name = pin_bank->name;
 879                 pin_bank->grange.id = bank;
 880                 pin_bank->grange.pin_base = drvdata->pin_base
 881                                                 + pin_bank->pin_base;
 882                 pin_bank->grange.base = pin_bank->grange.pin_base;
 883                 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
 884                 pin_bank->grange.gc = &pin_bank->gpio_chip;
 885                 pinctrl_add_gpio_range(drvdata->pctl_dev, &pin_bank->grange);
 886         }
 887
 888         return 0;
 889 }
 890
 891 /* unregister the pinctrl interface with the pinctrl subsystem */
 892 static int samsung_pinctrl_unregister(struct platform_device *pdev,
 893                                       struct samsung_pinctrl_drv_data *drvdata)
 894 {
 895         struct samsung_pin_bank *bank = drvdata->pin_banks;
 896         int i;
 897
 898         for (i = 0; i < drvdata->nr_banks; ++i, ++bank)
 899                 pinctrl_remove_gpio_range(drvdata->pctl_dev, &bank->grange);
 900
 901         return 0;
 902 }
 903
 904 static const struct gpio_chip samsung_gpiolib_chip = {
 905         .request = gpiochip_generic_request,
 906         .free = gpiochip_generic_free,
 907         .set = samsung_gpio_set,
 908         .get = samsung_gpio_get,
 909         .direction_input = samsung_gpio_direction_input,
 910         .direction_output = samsung_gpio_direction_output,
 911         .to_irq = samsung_gpio_to_irq,
 912         .owner = THIS_MODULE,
 913 };
 914
 915 /* register the gpiolib interface with the gpiolib subsystem */
 916 static int samsung_gpiolib_register(struct platform_device *pdev,
 917                                     struct samsung_pinctrl_drv_data *drvdata)
 918 {
 919         struct samsung_pin_bank *bank = drvdata->pin_banks;
 920         struct gpio_chip *gc;
 921         int ret;
 922         int i;
 923
 924         for (i = 0; i < drvdata->nr_banks; ++i, ++bank) {
 925                 bank->gpio_chip = samsung_gpiolib_chip;
 926
 927                 gc = &bank->gpio_chip;
 928                 gc->base = bank->grange.base;
 929                 gc->ngpio = bank->nr_pins;
 930                 gc->parent = &pdev->dev;
 931                 gc->of_node = bank->of_node;
 932                 gc->label = bank->name;
 933
 934                 ret = devm_gpiochip_add_data(&pdev->dev, gc, bank);
 935                 if (ret) {
 936                         dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
 937                                                         gc->label, ret);
 938                         return ret;
 939                 }
 940         }
 941
 942         return 0;
 943 }
 944
 945 /* retrieve the soc specific data */
 946 static const struct samsung_pin_ctrl *
 947 samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d,
 948                              struct platform_device *pdev)
 949 {
 950         int id;
 951         struct device_node *node = pdev->dev.of_node;
 952         struct device_node *np;
 953         const struct samsung_pin_bank_data *bdata;
 954         const struct samsung_pin_ctrl *ctrl;
 955         struct samsung_pin_bank *bank;
 956         struct resource *res;
 957         void __iomem *virt_base[SAMSUNG_PINCTRL_NUM_RESOURCES];
 958         unsigned int i;
 959
 960         id = of_alias_get_id(node, "pinctrl");
 961         if (id < 0) {
 962                 dev_err(&pdev->dev, "failed to get alias id\n");
 963                 return ERR_PTR(-ENOENT);
 964         }
 965         ctrl = of_device_get_match_data(&pdev->dev);
 966         ctrl += id;
 967
 968         d->suspend = ctrl->suspend;
 969         d->resume = ctrl->resume;
 970         d->nr_banks = ctrl->nr_banks;
 971         d->pin_banks = devm_kcalloc(&pdev->dev, d->nr_banks,
 972                                         sizeof(*d->pin_banks), GFP_KERNEL);
 973         if (!d->pin_banks)
 974                 return ERR_PTR(-ENOMEM);
 975
 976         if (ctrl->nr_ext_resources + 1 > SAMSUNG_PINCTRL_NUM_RESOURCES)
 977                 return ERR_PTR(-EINVAL);
 978
 979         for (i = 0; i < ctrl->nr_ext_resources + 1; i++) {
 980                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 981                 if (!res) {
 982                         dev_err(&pdev->dev, "failed to get mem%d resource\n", i);
 983                         return ERR_PTR(-EINVAL);
 984                 }
 985                 virt_base[i] = devm_ioremap(&pdev->dev, res->start,
 986                                                 resource_size(res));
 987                 if (!virt_base[i]) {
 988                         dev_err(&pdev->dev, "failed to ioremap %pR\n", res);
 989                         return ERR_PTR(-EIO);
 990                 }
 991         }
 992
 993         bank = d->pin_banks;
 994         bdata = ctrl->pin_banks;
 995         for (i = 0; i < ctrl->nr_banks; ++i, ++bdata, ++bank) {
 996                 bank->type = bdata->type;
 997                 bank->pctl_offset = bdata->pctl_offset;
 998                 bank->nr_pins = bdata->nr_pins;
 999                 bank->eint_func = bdata->eint_func;
1000                 bank->eint_type = bdata->eint_type;
1001                 bank->eint_mask = bdata->eint_mask;
1002                 bank->eint_offset = bdata->eint_offset;
1003                 bank->name = bdata->name;
1004
1005                 spin_lock_init(&bank->slock);
1006                 bank->drvdata = d;
1007                 bank->pin_base = d->nr_pins;
1008                 d->nr_pins += bank->nr_pins;
1009
1010                 bank->eint_base = virt_base[0];
1011                 bank->pctl_base = virt_base[bdata->pctl_res_idx];
1012         }
1013         /*
1014          * Legacy platforms should provide only one resource with IO memory.
1015          * Store it as virt_base because legacy driver needs to access it
1016          * through samsung_pinctrl_drv_data.
1017          */
1018         d->virt_base = virt_base[0];
1019
1020         for_each_child_of_node(node, np) {
1021                 if (!of_find_property(np, "gpio-controller", NULL))
1022                         continue;
1023                 bank = d->pin_banks;
1024                 for (i = 0; i < d->nr_banks; ++i, ++bank) {
1025                         if (!strcmp(bank->name, np->name)) {
1026                                 bank->of_node = np;
1027                                 break;
1028                         }
1029                 }
1030         }
1031
1032         d->pin_base = pin_base;
1033         pin_base += d->nr_pins;
1034
1035         return ctrl;
1036 }
1037
1038 static int samsung_pinctrl_probe(struct platform_device *pdev)
1039 {
1040         struct samsung_pinctrl_drv_data *drvdata;
1041         const struct samsung_pin_ctrl *ctrl;
1042         struct device *dev = &pdev->dev;
1043         struct resource *res;
1044         int ret;
1045
1046         drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
1047         if (!drvdata)
1048                 return -ENOMEM;
1049
1050         ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev);
1051         if (IS_ERR(ctrl)) {
1052                 dev_err(&pdev->dev, "driver data not available\n");
1053                 return PTR_ERR(ctrl);
1054         }
1055         drvdata->dev = dev;
1056
1057         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1058         if (res)
1059                 drvdata->irq = res->start;
1060
1061         if (ctrl->retention_data) {
1062                 drvdata->retention_ctrl = ctrl->retention_data->init(drvdata,
1063                                                           ctrl->retention_data);
1064                 if (IS_ERR(drvdata->retention_ctrl))
1065                         return PTR_ERR(drvdata->retention_ctrl);
1066         }
1067
1068         ret = samsung_pinctrl_register(pdev, drvdata);
1069         if (ret)
1070                 return ret;
1071
1072         ret = samsung_gpiolib_register(pdev, drvdata);
1073         if (ret) {
1074                 samsung_pinctrl_unregister(pdev, drvdata);
1075                 return ret;
1076         }
1077
1078         if (ctrl->eint_gpio_init)
1079                 ctrl->eint_gpio_init(drvdata);
1080         if (ctrl->eint_wkup_init)
1081                 ctrl->eint_wkup_init(drvdata);
1082
1083         platform_set_drvdata(pdev, drvdata);
1084
1085         return 0;
1086 }
1087
1088 /**
1089  * samsung_pinctrl_suspend - save pinctrl state for suspend
1090  *
1091  * Save data for all banks handled by this device.
1092  */
1093 static int __maybe_unused samsung_pinctrl_suspend(struct device *dev)
1094 {
1095         struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
1096         int i;
1097
1098         for (i = 0; i < drvdata->nr_banks; i++) {
1099                 struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
1100                 void __iomem *reg = bank->pctl_base + bank->pctl_offset;
1101                 const u8 *offs = bank->type->reg_offset;
1102                 const u8 *widths = bank->type->fld_width;
1103                 enum pincfg_type type;
1104
1105                 /* Registers without a powerdown config aren't lost */
1106                 if (!widths[PINCFG_TYPE_CON_PDN])
1107                         continue;
1108
1109                 for (type = 0; type < PINCFG_TYPE_NUM; type++)
1110                         if (widths[type])
1111                                 bank->pm_save[type] = readl(reg + offs[type]);
1112
1113                 if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
1114                         /* Some banks have two config registers */
1115                         bank->pm_save[PINCFG_TYPE_NUM] =
1116                                 readl(reg + offs[PINCFG_TYPE_FUNC] + 4);
1117                         pr_debug("Save %s @ %p (con %#010x %08x)\n",
1118                                  bank->name, reg,
1119                                  bank->pm_save[PINCFG_TYPE_FUNC],
1120                                  bank->pm_save[PINCFG_TYPE_NUM]);
1121                 } else {
1122                         pr_debug("Save %s @ %p (con %#010x)\n", bank->name,
1123                                  reg, bank->pm_save[PINCFG_TYPE_FUNC]);
1124                 }
1125         }
1126
1127         if (drvdata->suspend)
1128                 drvdata->suspend(drvdata);
1129         if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable)
1130                 drvdata->retention_ctrl->enable(drvdata);
1131
1132         return 0;
1133 }
1134
1135 /**
1136  * samsung_pinctrl_resume - restore pinctrl state from suspend
1137  *
1138  * Restore one of the banks that was saved during suspend.
1139  *
1140  * We don't bother doing anything complicated to avoid glitching lines since
1141  * we're called before pad retention is turned off.
1142  */
1143 static int __maybe_unused samsung_pinctrl_resume(struct device *dev)
1144 {
1145         struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
1146         int i;
1147
1148         if (drvdata->resume)
1149                 drvdata->resume(drvdata);
1150
1151         for (i = 0; i < drvdata->nr_banks; i++) {
1152                 struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
1153                 void __iomem *reg = bank->pctl_base + bank->pctl_offset;
1154                 const u8 *offs = bank->type->reg_offset;
1155                 const u8 *widths = bank->type->fld_width;
1156                 enum pincfg_type type;
1157
1158                 /* Registers without a powerdown config aren't lost */
1159                 if (!widths[PINCFG_TYPE_CON_PDN])
1160                         continue;
1161
1162                 if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
1163                         /* Some banks have two config registers */
1164                         pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n",
1165                                  bank->name, reg,
1166                                  readl(reg + offs[PINCFG_TYPE_FUNC]),
1167                                  readl(reg + offs[PINCFG_TYPE_FUNC] + 4),
1168                                  bank->pm_save[PINCFG_TYPE_FUNC],
1169                                  bank->pm_save[PINCFG_TYPE_NUM]);
1170                         writel(bank->pm_save[PINCFG_TYPE_NUM],
1171                                reg + offs[PINCFG_TYPE_FUNC] + 4);
1172                 } else {
1173                         pr_debug("%s @ %p (con %#010x => %#010x)\n", bank->name,
1174                                  reg, readl(reg + offs[PINCFG_TYPE_FUNC]),
1175                                  bank->pm_save[PINCFG_TYPE_FUNC]);
1176                 }
1177                 for (type = 0; type < PINCFG_TYPE_NUM; type++)
1178                         if (widths[type])
1179                                 writel(bank->pm_save[type], reg + offs[type]);
1180         }
1181
1182         if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable)
1183                 drvdata->retention_ctrl->disable(drvdata);
1184
1185         return 0;
1186 }
1187
1188 static const struct of_device_id samsung_pinctrl_dt_match[] = {
1189 #ifdef CONFIG_PINCTRL_EXYNOS_ARM
1190         { .compatible = "samsung,exynos3250-pinctrl",
1191                 .data = exynos3250_pin_ctrl },
1192         { .compatible = "samsung,exynos4210-pinctrl",
1193                 .data = exynos4210_pin_ctrl },
1194         { .compatible = "samsung,exynos4x12-pinctrl",
1195                 .data = exynos4x12_pin_ctrl },
1196         { .compatible = "samsung,exynos5250-pinctrl",
1197                 .data = exynos5250_pin_ctrl },
1198         { .compatible = "samsung,exynos5260-pinctrl",
1199                 .data = exynos5260_pin_ctrl },
1200         { .compatible = "samsung,exynos5410-pinctrl",
1201                 .data = exynos5410_pin_ctrl },
1202         { .compatible = "samsung,exynos5420-pinctrl",
1203                 .data = exynos5420_pin_ctrl },
1204         { .compatible = "samsung,s5pv210-pinctrl",
1205                 .data = s5pv210_pin_ctrl },
1206 #endif
1207 #ifdef CONFIG_PINCTRL_EXYNOS_ARM64
1208         { .compatible = "samsung,exynos5433-pinctrl",
1209                 .data = exynos5433_pin_ctrl },
1210         { .compatible = "samsung,exynos7-pinctrl",
1211                 .data = exynos7_pin_ctrl },
1212 #endif
1213 #ifdef CONFIG_PINCTRL_S3C64XX
1214         { .compatible = "samsung,s3c64xx-pinctrl",
1215                 .data = s3c64xx_pin_ctrl },
1216 #endif
1217 #ifdef CONFIG_PINCTRL_S3C24XX
1218         { .compatible = "samsung,s3c2412-pinctrl",
1219                 .data = s3c2412_pin_ctrl },
1220         { .compatible = "samsung,s3c2416-pinctrl",
1221                 .data = s3c2416_pin_ctrl },
1222         { .compatible = "samsung,s3c2440-pinctrl",
1223                 .data = s3c2440_pin_ctrl },
1224         { .compatible = "samsung,s3c2450-pinctrl",
1225                 .data = s3c2450_pin_ctrl },
1226 #endif
1227         {},
1228 };
1229
1230 static const struct dev_pm_ops samsung_pinctrl_pm_ops = {
1231         SET_LATE_SYSTEM_SLEEP_PM_OPS(samsung_pinctrl_suspend,
1232                                      samsung_pinctrl_resume)
1233 };
1234
1235 static struct platform_driver samsung_pinctrl_driver = {
1236         .probe          = samsung_pinctrl_probe,
1237         .driver = {
1238                 .name   = "samsung-pinctrl",
1239                 .of_match_table = samsung_pinctrl_dt_match,
1240                 .suppress_bind_attrs = true,
1241                 .pm = &samsung_pinctrl_pm_ops,
1242         },
1243 };
1244
1245 static int __init samsung_pinctrl_drv_register(void)
1246 {
1247         return platform_driver_register(&samsung_pinctrl_driver);
1248 }
1249 postcore_initcall(samsung_pinctrl_drv_register);