drivers/pinctrl/samsung/pinctrl-samsung.c

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This source file includes following definitions.
samsung_get_group_count
samsung_get_group_name
samsung_get_group_pins
reserve_map
add_map_mux
add_map_configs
add_config
samsung_dt_free_map
samsung_dt_subnode_to_map
samsung_dt_node_to_map
samsung_pin_dbg_show
samsung_get_functions_count
samsung_pinmux_get_fname
samsung_pinmux_get_groups
pin_to_reg_bank
samsung_pinmux_setup
samsung_pinmux_set_mux
samsung_pinconf_rw
samsung_pinconf_set
samsung_pinconf_get
samsung_pinconf_group_set
samsung_pinconf_group_get
samsung_gpio_set_value
samsung_gpio_set
samsung_gpio_get
samsung_gpio_set_direction
samsung_gpio_direction_input
samsung_gpio_direction_output
samsung_gpio_to_irq
samsung_pinctrl_create_groups
samsung_pinctrl_create_function
samsung_pinctrl_create_functions
samsung_pinctrl_parse_dt
samsung_pinctrl_register
samsung_pinctrl_unregister
samsung_gpiolib_register
samsung_pinctrl_get_soc_data_for_of_alias
samsung_pinctrl_get_soc_data
samsung_pinctrl_probe
samsung_pinctrl_suspend
samsung_pinctrl_resume
samsung_pinctrl_drv_register
   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         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         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         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         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         spin_lock_irqsave(&bank->slock, flags);
 565         samsung_gpio_set_value(gc, offset, value);
 566         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         spin_lock_irqsave(&bank->slock, flags);
 630         ret = samsung_gpio_set_direction(gc, offset, true);
 631         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         spin_lock_irqsave(&bank->slock, flags);
 644         samsung_gpio_set_value(gc, offset, value);
 645         ret = samsung_gpio_set_direction(gc, offset, false);
 646         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                 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);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/pinctrl/samsung/pinctrl-samsung.c

DEFINITIONS
