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/err.h> 19#include <linux/gpio/driver.h> 20#include <linux/init.h> 21#include <linux/io.h> 22#include <linux/irqdomain.h> 23#include <linux/of.h> 24#include <linux/platform_device.h> 25#include <linux/property.h> 26#include <linux/seq_file.h> 27#include <linux/slab.h> 28#include <linux/spinlock.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 */ 37static 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 48static int samsung_get_group_count(struct pinctrl_dev *pctldev) 49{ 50 struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev); 51 52 return pmx->nr_groups; 53} 54 55static const char *samsung_get_group_name(struct pinctrl_dev *pctldev, 56 unsigned group) 57{ 58 struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev); 59 60 return pmx->pin_groups[group].name; 61} 62 63static int samsung_get_group_pins(struct pinctrl_dev *pctldev, 64 unsigned group, 65 const unsigned **pins, 66 unsigned *num_pins) 67{ 68 struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev); 69 70 *pins = pmx->pin_groups[group].pins; 71 *num_pins = pmx->pin_groups[group].num_pins; 72 73 return 0; 74} 75 76static int reserve_map(struct device *dev, struct pinctrl_map **map, 77 unsigned *reserved_maps, unsigned *num_maps, 78 unsigned reserve) 79{ 80 unsigned old_num = *reserved_maps; 81 unsigned new_num = *num_maps + reserve; 82 struct pinctrl_map *new_map; 83 84 if (old_num >= new_num) 85 return 0; 86 87 new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL); 88 if (!new_map) 89 return -ENOMEM; 90 91 memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map)); 92 93 *map = new_map; 94 *reserved_maps = new_num; 95 96 return 0; 97} 98 99static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps, 100 unsigned *num_maps, const char *group, 101 const char *function) 102{ 103 if (WARN_ON(*num_maps == *reserved_maps)) 104 return -ENOSPC; 105 106 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; 107 (*map)[*num_maps].data.mux.group = group; 108 (*map)[*num_maps].data.mux.function = function; 109 (*num_maps)++; 110 111 return 0; 112} 113 114static int add_map_configs(struct device *dev, struct pinctrl_map **map, 115 unsigned *reserved_maps, unsigned *num_maps, 116 const char *group, unsigned long *configs, 117 unsigned num_configs) 118{ 119 unsigned long *dup_configs; 120 121 if (WARN_ON(*num_maps == *reserved_maps)) 122 return -ENOSPC; 123 124 dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs), 125 GFP_KERNEL); 126 if (!dup_configs) 127 return -ENOMEM; 128 129 (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP; 130 (*map)[*num_maps].data.configs.group_or_pin = group; 131 (*map)[*num_maps].data.configs.configs = dup_configs; 132 (*map)[*num_maps].data.configs.num_configs = num_configs; 133 (*num_maps)++; 134 135 return 0; 136} 137 138static int add_config(struct device *dev, unsigned long **configs, 139 unsigned *num_configs, unsigned long config) 140{ 141 unsigned old_num = *num_configs; 142 unsigned new_num = old_num + 1; 143 unsigned long *new_configs; 144 145 new_configs = krealloc(*configs, sizeof(*new_configs) * new_num, 146 GFP_KERNEL); 147 if (!new_configs) 148 return -ENOMEM; 149 150 new_configs[old_num] = config; 151 152 *configs = new_configs; 153 *num_configs = new_num; 154 155 return 0; 156} 157 158static void samsung_dt_free_map(struct pinctrl_dev *pctldev, 159 struct pinctrl_map *map, 160 unsigned num_maps) 161{ 162 int i; 163 164 for (i = 0; i < num_maps; i++) 165 if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP) 166 kfree(map[i].data.configs.configs); 167 168 kfree(map); 169} 170 171static int samsung_dt_subnode_to_map(struct samsung_pinctrl_drv_data *drvdata, 172 struct device *dev, 173 struct device_node *np, 174 struct pinctrl_map **map, 175 unsigned *reserved_maps, 176 unsigned *num_maps) 177{ 178 int ret, i; 179 u32 val; 180 unsigned long config; 181 unsigned long *configs = NULL; 182 unsigned num_configs = 0; 183 unsigned reserve; 184 struct property *prop; 185 const char *group; 186 bool has_func = false; 187 188 ret = of_property_read_u32(np, "samsung,pin-function", &val); 189 if (!ret) 190 has_func = true; 191 192 for (i = 0; i < ARRAY_SIZE(cfg_params); i++) { 193 ret = of_property_read_u32(np, cfg_params[i].property, &val); 194 if (!ret) { 195 config = PINCFG_PACK(cfg_params[i].param, val); 196 ret = add_config(dev, &configs, &num_configs, config); 197 if (ret < 0) 198 goto exit; 199 /* EINVAL=missing, which is fine since it's optional */ 200 } else if (ret != -EINVAL) { 201 dev_err(dev, "could not parse property %s\n", 202 cfg_params[i].property); 203 } 204 } 205 206 reserve = 0; 207 if (has_func) 208 reserve++; 209 if (num_configs) 210 reserve++; 211 ret = of_property_count_strings(np, "samsung,pins"); 212 if (ret < 0) { 213 dev_err(dev, "could not parse property samsung,pins\n"); 214 goto exit; 215 } 216 reserve *= ret; 217 218 ret = reserve_map(dev, map, reserved_maps, num_maps, reserve); 219 if (ret < 0) 220 goto exit; 221 222 of_property_for_each_string(np, "samsung,pins", prop, group) { 223 if (has_func) { 224 ret = add_map_mux(map, reserved_maps, 225 num_maps, group, np->full_name); 226 if (ret < 0) 227 goto exit; 228 } 229 230 if (num_configs) { 231 ret = add_map_configs(dev, map, reserved_maps, 232 num_maps, group, configs, 233 num_configs); 234 if (ret < 0) 235 goto exit; 236 } 237 } 238 239 ret = 0; 240 241exit: 242 kfree(configs); 243 return ret; 244} 245 246static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev, 247 struct device_node *np_config, 248 struct pinctrl_map **map, 249 unsigned *num_maps) 250{ 251 struct samsung_pinctrl_drv_data *drvdata; 252 unsigned reserved_maps; 253 struct device_node *np; 254 int ret; 255 256 drvdata = pinctrl_dev_get_drvdata(pctldev); 257 258 reserved_maps = 0; 259 *map = NULL; 260 *num_maps = 0; 261 262 if (!of_get_child_count(np_config)) 263 return samsung_dt_subnode_to_map(drvdata, pctldev->dev, 264 np_config, map, 265 &reserved_maps, 266 num_maps); 267 268 for_each_child_of_node(np_config, np) { 269 ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev, np, map, 270 &reserved_maps, num_maps); 271 if (ret < 0) { 272 samsung_dt_free_map(pctldev, *map, *num_maps); 273 of_node_put(np); 274 return ret; 275 } 276 } 277 278 return 0; 279} 280 281#ifdef CONFIG_DEBUG_FS 282/* Forward declaration which can be used by samsung_pin_dbg_show */ 283static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, 284 unsigned long *config); 285static const char * const reg_names[] = {"CON", "DAT", "PUD", "DRV", "CON_PDN", 286 "PUD_PDN"}; 287 288static void samsung_pin_dbg_show(struct pinctrl_dev *pctldev, 289 struct seq_file *s, unsigned int pin) 290{ 291 enum pincfg_type cfg_type; 292 unsigned long config; 293 int ret; 294 295 for (cfg_type = 0; cfg_type < PINCFG_TYPE_NUM; cfg_type++) { 296 config = PINCFG_PACK(cfg_type, 0); 297 ret = samsung_pinconf_get(pctldev, pin, &config); 298 if (ret < 0) 299 continue; 300 301 seq_printf(s, " %s(0x%lx)", reg_names[cfg_type], 302 PINCFG_UNPACK_VALUE(config)); 303 } 304} 305#endif 306 307/* list of pinctrl callbacks for the pinctrl core */ 308static const struct pinctrl_ops samsung_pctrl_ops = { 309 .get_groups_count = samsung_get_group_count, 310 .get_group_name = samsung_get_group_name, 311 .get_group_pins = samsung_get_group_pins, 312 .dt_node_to_map = samsung_dt_node_to_map, 313 .dt_free_map = samsung_dt_free_map, 314#ifdef CONFIG_DEBUG_FS 315 .pin_dbg_show = samsung_pin_dbg_show, 316#endif 317}; 318 319/* check if the selector is a valid pin function selector */ 320static int samsung_get_functions_count(struct pinctrl_dev *pctldev) 321{ 322 struct samsung_pinctrl_drv_data *drvdata; 323 324 drvdata = pinctrl_dev_get_drvdata(pctldev); 325 return drvdata->nr_functions; 326} 327 328/* return the name of the pin function specified */ 329static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev, 330 unsigned selector) 331{ 332 struct samsung_pinctrl_drv_data *drvdata; 333 334 drvdata = pinctrl_dev_get_drvdata(pctldev); 335 return drvdata->pmx_functions[selector].name; 336} 337 338/* return the groups associated for the specified function selector */ 339static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev, 340 unsigned selector, const char * const **groups, 341 unsigned * const num_groups) 342{ 343 struct samsung_pinctrl_drv_data *drvdata; 344 345 drvdata = pinctrl_dev_get_drvdata(pctldev); 346 *groups = drvdata->pmx_functions[selector].groups; 347 *num_groups = drvdata->pmx_functions[selector].num_groups; 348 return 0; 349} 350 351/* 352 * given a pin number that is local to a pin controller, find out the pin bank 353 * and the register base of the pin bank. 354 */ 355static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata, 356 unsigned pin, void __iomem **reg, u32 *offset, 357 struct samsung_pin_bank **bank) 358{ 359 struct samsung_pin_bank *b; 360 361 b = drvdata->pin_banks; 362 363 while ((pin >= b->pin_base) && 364 ((b->pin_base + b->nr_pins - 1) < pin)) 365 b++; 366 367 *reg = b->pctl_base + b->pctl_offset; 368 *offset = pin - b->pin_base; 369 if (bank) 370 *bank = b; 371} 372 373/* enable or disable a pinmux function */ 374static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector, 375 unsigned group) 376{ 377 struct samsung_pinctrl_drv_data *drvdata; 378 const struct samsung_pin_bank_type *type; 379 struct samsung_pin_bank *bank; 380 void __iomem *reg; 381 u32 mask, shift, data, pin_offset; 382 unsigned long flags; 383 const struct samsung_pmx_func *func; 384 const struct samsung_pin_group *grp; 385 386 drvdata = pinctrl_dev_get_drvdata(pctldev); 387 func = &drvdata->pmx_functions[selector]; 388 grp = &drvdata->pin_groups[group]; 389 390 pin_to_reg_bank(drvdata, grp->pins[0], ®, &pin_offset, &bank); 391 type = bank->type; 392 mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1; 393 shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC]; 394 if (shift >= 32) { 395 /* Some banks have two config registers */ 396 shift -= 32; 397 reg += 4; 398 } 399 400 raw_spin_lock_irqsave(&bank->slock, flags); 401 402 data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]); 403 data &= ~(mask << shift); 404 data |= func->val << shift; 405 writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]); 406 407 raw_spin_unlock_irqrestore(&bank->slock, flags); 408} 409 410/* enable a specified pinmux by writing to registers */ 411static int samsung_pinmux_set_mux(struct pinctrl_dev *pctldev, 412 unsigned selector, 413 unsigned group) 414{ 415 samsung_pinmux_setup(pctldev, selector, group); 416 return 0; 417} 418 419/* list of pinmux callbacks for the pinmux vertical in pinctrl core */ 420static const struct pinmux_ops samsung_pinmux_ops = { 421 .get_functions_count = samsung_get_functions_count, 422 .get_function_name = samsung_pinmux_get_fname, 423 .get_function_groups = samsung_pinmux_get_groups, 424 .set_mux = samsung_pinmux_set_mux, 425}; 426 427/* set or get the pin config settings for a specified pin */ 428static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin, 429 unsigned long *config, bool set) 430{ 431 struct samsung_pinctrl_drv_data *drvdata; 432 const struct samsung_pin_bank_type *type; 433 struct samsung_pin_bank *bank; 434 void __iomem *reg_base; 435 enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config); 436 u32 data, width, pin_offset, mask, shift; 437 u32 cfg_value, cfg_reg; 438 unsigned long flags; 439 440 drvdata = pinctrl_dev_get_drvdata(pctldev); 441 pin_to_reg_bank(drvdata, pin, ®_base, &pin_offset, &bank); 442 type = bank->type; 443 444 if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type]) 445 return -EINVAL; 446 447 width = type->fld_width[cfg_type]; 448 cfg_reg = type->reg_offset[cfg_type]; 449 450 raw_spin_lock_irqsave(&bank->slock, flags); 451 452 mask = (1 << width) - 1; 453 shift = pin_offset * width; 454 data = readl(reg_base + cfg_reg); 455 456 if (set) { 457 cfg_value = PINCFG_UNPACK_VALUE(*config); 458 data &= ~(mask << shift); 459 data |= (cfg_value << shift); 460 writel(data, reg_base + cfg_reg); 461 } else { 462 data >>= shift; 463 data &= mask; 464 *config = PINCFG_PACK(cfg_type, data); 465 } 466 467 raw_spin_unlock_irqrestore(&bank->slock, flags); 468 469 return 0; 470} 471 472/* set the pin config settings for a specified pin */ 473static int samsung_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, 474 unsigned long *configs, unsigned num_configs) 475{ 476 int i, ret; 477 478 for (i = 0; i < num_configs; i++) { 479 ret = samsung_pinconf_rw(pctldev, pin, &configs[i], true); 480 if (ret < 0) 481 return ret; 482 } /* for each config */ 483 484 return 0; 485} 486 487/* get the pin config settings for a specified pin */ 488static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, 489 unsigned long *config) 490{ 491 return samsung_pinconf_rw(pctldev, pin, config, false); 492} 493 494/* set the pin config settings for a specified pin group */ 495static int samsung_pinconf_group_set(struct pinctrl_dev *pctldev, 496 unsigned group, unsigned long *configs, 497 unsigned num_configs) 498{ 499 struct samsung_pinctrl_drv_data *drvdata; 500 const unsigned int *pins; 501 unsigned int cnt; 502 503 drvdata = pinctrl_dev_get_drvdata(pctldev); 504 pins = drvdata->pin_groups[group].pins; 505 506 for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++) 507 samsung_pinconf_set(pctldev, pins[cnt], configs, num_configs); 508 509 return 0; 510} 511 512/* get the pin config settings for a specified pin group */ 513static int samsung_pinconf_group_get(struct pinctrl_dev *pctldev, 514 unsigned int group, unsigned long *config) 515{ 516 struct samsung_pinctrl_drv_data *drvdata; 517 const unsigned int *pins; 518 519 drvdata = pinctrl_dev_get_drvdata(pctldev); 520 pins = drvdata->pin_groups[group].pins; 521 samsung_pinconf_get(pctldev, pins[0], config); 522 return 0; 523} 524 525/* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */ 526static const struct pinconf_ops samsung_pinconf_ops = { 527 .pin_config_get = samsung_pinconf_get, 528 .pin_config_set = samsung_pinconf_set, 529 .pin_config_group_get = samsung_pinconf_group_get, 530 .pin_config_group_set = samsung_pinconf_group_set, 531}; 532 533/* 534 * The samsung_gpio_set_vlaue() should be called with "bank->slock" held 535 * to avoid race condition. 536 */ 537static void samsung_gpio_set_value(struct gpio_chip *gc, 538 unsigned offset, int value) 539{ 540 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 541 const struct samsung_pin_bank_type *type = bank->type; 542 void __iomem *reg; 543 u32 data; 544 545 reg = bank->pctl_base + bank->pctl_offset; 546 547 data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]); 548 data &= ~(1 << offset); 549 if (value) 550 data |= 1 << offset; 551 writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]); 552} 553 554/* gpiolib gpio_set callback function */ 555static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value) 556{ 557 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 558 unsigned long flags; 559 560 raw_spin_lock_irqsave(&bank->slock, flags); 561 samsung_gpio_set_value(gc, offset, value); 562 raw_spin_unlock_irqrestore(&bank->slock, flags); 563} 564 565/* gpiolib gpio_get callback function */ 566static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset) 567{ 568 const void __iomem *reg; 569 u32 data; 570 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 571 const struct samsung_pin_bank_type *type = bank->type; 572 573 reg = bank->pctl_base + bank->pctl_offset; 574 575 data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]); 576 data >>= offset; 577 data &= 1; 578 return data; 579} 580 581/* 582 * The samsung_gpio_set_direction() should be called with "bank->slock" held 583 * to avoid race condition. 584 * The calls to gpio_direction_output() and gpio_direction_input() 585 * leads to this function call. 586 */ 587static int samsung_gpio_set_direction(struct gpio_chip *gc, 588 unsigned offset, bool input) 589{ 590 const struct samsung_pin_bank_type *type; 591 struct samsung_pin_bank *bank; 592 void __iomem *reg; 593 u32 data, mask, shift; 594 595 bank = gpiochip_get_data(gc); 596 type = bank->type; 597 598 reg = bank->pctl_base + bank->pctl_offset 599 + type->reg_offset[PINCFG_TYPE_FUNC]; 600 601 mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1; 602 shift = offset * type->fld_width[PINCFG_TYPE_FUNC]; 603 if (shift >= 32) { 604 /* Some banks have two config registers */ 605 shift -= 32; 606 reg += 4; 607 } 608 609 data = readl(reg); 610 data &= ~(mask << shift); 611 if (!input) 612 data |= PIN_CON_FUNC_OUTPUT << shift; 613 writel(data, reg); 614 615 return 0; 616} 617 618/* gpiolib gpio_direction_input callback function. */ 619static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset) 620{ 621 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 622 unsigned long flags; 623 int ret; 624 625 raw_spin_lock_irqsave(&bank->slock, flags); 626 ret = samsung_gpio_set_direction(gc, offset, true); 627 raw_spin_unlock_irqrestore(&bank->slock, flags); 628 return ret; 629} 630 631/* gpiolib gpio_direction_output callback function. */ 632static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset, 633 int value) 634{ 635 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 636 unsigned long flags; 637 int ret; 638 639 raw_spin_lock_irqsave(&bank->slock, flags); 640 samsung_gpio_set_value(gc, offset, value); 641 ret = samsung_gpio_set_direction(gc, offset, false); 642 raw_spin_unlock_irqrestore(&bank->slock, flags); 643 644 return ret; 645} 646 647/* 648 * gpiod_to_irq() callback function. Creates a mapping between a GPIO pin 649 * and a virtual IRQ, if not already present. 650 */ 651static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset) 652{ 653 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 654 unsigned int virq; 655 656 if (!bank->irq_domain) 657 return -ENXIO; 658 659 virq = irq_create_mapping(bank->irq_domain, offset); 660 661 return (virq) ? : -ENXIO; 662} 663 664static int samsung_add_pin_ranges(struct gpio_chip *gc) 665{ 666 struct samsung_pin_bank *bank = gpiochip_get_data(gc); 667 668 bank->grange.name = bank->name; 669 bank->grange.id = bank->id; 670 bank->grange.pin_base = bank->pin_base; 671 bank->grange.base = gc->base; 672 bank->grange.npins = bank->nr_pins; 673 bank->grange.gc = &bank->gpio_chip; 674 pinctrl_add_gpio_range(bank->drvdata->pctl_dev, &bank->grange); 675 676 return 0; 677} 678 679static struct samsung_pin_group *samsung_pinctrl_create_groups( 680 struct device *dev, 681 struct samsung_pinctrl_drv_data *drvdata, 682 unsigned int *cnt) 683{ 684 struct pinctrl_desc *ctrldesc = &drvdata->pctl; 685 struct samsung_pin_group *groups, *grp; 686 const struct pinctrl_pin_desc *pdesc; 687 int i; 688 689 groups = devm_kcalloc(dev, ctrldesc->npins, sizeof(*groups), 690 GFP_KERNEL); 691 if (!groups) 692 return ERR_PTR(-EINVAL); 693 grp = groups; 694 695 pdesc = ctrldesc->pins; 696 for (i = 0; i < ctrldesc->npins; ++i, ++pdesc, ++grp) { 697 grp->name = pdesc->name; 698 grp->pins = &pdesc->number; 699 grp->num_pins = 1; 700 } 701 702 *cnt = ctrldesc->npins; 703 return groups; 704} 705 706static int samsung_pinctrl_create_function(struct device *dev, 707 struct samsung_pinctrl_drv_data *drvdata, 708 struct device_node *func_np, 709 struct samsung_pmx_func *func) 710{ 711 int npins; 712 int ret; 713 int i; 714 715 if (of_property_read_u32(func_np, "samsung,pin-function", &func->val)) 716 return 0; 717 718 npins = of_property_count_strings(func_np, "samsung,pins"); 719 if (npins < 1) { 720 dev_err(dev, "invalid pin list in %pOFn node", func_np); 721 return -EINVAL; 722 } 723 724 func->name = func_np->full_name; 725 726 func->groups = devm_kcalloc(dev, npins, sizeof(char *), GFP_KERNEL); 727 if (!func->groups) 728 return -ENOMEM; 729 730 for (i = 0; i < npins; ++i) { 731 const char *gname; 732 733 ret = of_property_read_string_index(func_np, "samsung,pins", 734 i, &gname); 735 if (ret) { 736 dev_err(dev, 737 "failed to read pin name %d from %pOFn node\n", 738 i, func_np); 739 return ret; 740 } 741 742 func->groups[i] = gname; 743 } 744 745 func->num_groups = npins; 746 return 1; 747} 748 749static struct samsung_pmx_func *samsung_pinctrl_create_functions( 750 struct device *dev, 751 struct samsung_pinctrl_drv_data *drvdata, 752 unsigned int *cnt) 753{ 754 struct samsung_pmx_func *functions, *func; 755 struct device_node *dev_np = dev->of_node; 756 struct device_node *cfg_np; 757 unsigned int func_cnt = 0; 758 int ret; 759 760 /* 761 * Iterate over all the child nodes of the pin controller node 762 * and create pin groups and pin function lists. 763 */ 764 for_each_child_of_node(dev_np, cfg_np) { 765 struct device_node *func_np; 766 767 if (!of_get_child_count(cfg_np)) { 768 if (!of_find_property(cfg_np, 769 "samsung,pin-function", NULL)) 770 continue; 771 ++func_cnt; 772 continue; 773 } 774 775 for_each_child_of_node(cfg_np, func_np) { 776 if (!of_find_property(func_np, 777 "samsung,pin-function", NULL)) 778 continue; 779 ++func_cnt; 780 } 781 } 782 783 functions = devm_kcalloc(dev, func_cnt, sizeof(*functions), 784 GFP_KERNEL); 785 if (!functions) 786 return ERR_PTR(-ENOMEM); 787 func = functions; 788 789 /* 790 * Iterate over all the child nodes of the pin controller node 791 * and create pin groups and pin function lists. 792 */ 793 func_cnt = 0; 794 for_each_child_of_node(dev_np, cfg_np) { 795 struct device_node *func_np; 796 797 if (!of_get_child_count(cfg_np)) { 798 ret = samsung_pinctrl_create_function(dev, drvdata, 799 cfg_np, func); 800 if (ret < 0) { 801 of_node_put(cfg_np); 802 return ERR_PTR(ret); 803 } 804 if (ret > 0) { 805 ++func; 806 ++func_cnt; 807 } 808 continue; 809 } 810 811 for_each_child_of_node(cfg_np, func_np) { 812 ret = samsung_pinctrl_create_function(dev, drvdata, 813 func_np, func); 814 if (ret < 0) { 815 of_node_put(func_np); 816 of_node_put(cfg_np); 817 return ERR_PTR(ret); 818 } 819 if (ret > 0) { 820 ++func; 821 ++func_cnt; 822 } 823 } 824 } 825 826 *cnt = func_cnt; 827 return functions; 828} 829 830/* 831 * Parse the information about all the available pin groups and pin functions 832 * from device node of the pin-controller. A pin group is formed with all 833 * the pins listed in the "samsung,pins" property. 834 */ 835 836static int samsung_pinctrl_parse_dt(struct platform_device *pdev, 837 struct samsung_pinctrl_drv_data *drvdata) 838{ 839 struct device *dev = &pdev->dev; 840 struct samsung_pin_group *groups; 841 struct samsung_pmx_func *functions; 842 unsigned int grp_cnt = 0, func_cnt = 0; 843 844 groups = samsung_pinctrl_create_groups(dev, drvdata, &grp_cnt); 845 if (IS_ERR(groups)) { 846 dev_err(dev, "failed to parse pin groups\n"); 847 return PTR_ERR(groups); 848 } 849 850 functions = samsung_pinctrl_create_functions(dev, drvdata, &func_cnt); 851 if (IS_ERR(functions)) { 852 dev_err(dev, "failed to parse pin functions\n"); 853 return PTR_ERR(functions); 854 } 855 856 drvdata->pin_groups = groups; 857 drvdata->nr_groups = grp_cnt; 858 drvdata->pmx_functions = functions; 859 drvdata->nr_functions = func_cnt; 860 861 return 0; 862} 863 864/* register the pinctrl interface with the pinctrl subsystem */ 865static int samsung_pinctrl_register(struct platform_device *pdev, 866 struct samsung_pinctrl_drv_data *drvdata) 867{ 868 struct pinctrl_desc *ctrldesc = &drvdata->pctl; 869 struct pinctrl_pin_desc *pindesc, *pdesc; 870 struct samsung_pin_bank *pin_bank; 871 char *pin_names; 872 int pin, bank, ret; 873 874 ctrldesc->name = "samsung-pinctrl"; 875 ctrldesc->owner = THIS_MODULE; 876 ctrldesc->pctlops = &samsung_pctrl_ops; 877 ctrldesc->pmxops = &samsung_pinmux_ops; 878 ctrldesc->confops = &samsung_pinconf_ops; 879 880 pindesc = devm_kcalloc(&pdev->dev, 881 drvdata->nr_pins, sizeof(*pindesc), 882 GFP_KERNEL); 883 if (!pindesc) 884 return -ENOMEM; 885 ctrldesc->pins = pindesc; 886 ctrldesc->npins = drvdata->nr_pins; 887 888 /* dynamically populate the pin number and pin name for pindesc */ 889 for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++) 890 pdesc->number = pin; 891 892 /* 893 * allocate space for storing the dynamically generated names for all 894 * the pins which belong to this pin-controller. 895 */ 896 pin_names = devm_kzalloc(&pdev->dev, 897 array3_size(sizeof(char), PIN_NAME_LENGTH, 898 drvdata->nr_pins), 899 GFP_KERNEL); 900 if (!pin_names) 901 return -ENOMEM; 902 903 /* for each pin, the name of the pin is pin-bank name + pin number */ 904 for (bank = 0; bank < drvdata->nr_banks; bank++) { 905 pin_bank = &drvdata->pin_banks[bank]; 906 pin_bank->id = bank; 907 for (pin = 0; pin < pin_bank->nr_pins; pin++) { 908 sprintf(pin_names, "%s-%d", pin_bank->name, pin); 909 pdesc = pindesc + pin_bank->pin_base + pin; 910 pdesc->name = pin_names; 911 pin_names += PIN_NAME_LENGTH; 912 } 913 } 914 915 ret = samsung_pinctrl_parse_dt(pdev, drvdata); 916 if (ret) 917 return ret; 918 919 ret = devm_pinctrl_register_and_init(&pdev->dev, ctrldesc, drvdata, 920 &drvdata->pctl_dev); 921 if (ret) { 922 dev_err(&pdev->dev, "could not register pinctrl driver\n"); 923 return ret; 924 } 925 926 return 0; 927} 928 929/* unregister the pinctrl interface with the pinctrl subsystem */ 930static 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 942static 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 .add_pin_ranges = samsung_add_pin_ranges, 951 .owner = THIS_MODULE, 952}; 953 954/* register the gpiolib interface with the gpiolib subsystem */ 955static int samsung_gpiolib_register(struct platform_device *pdev, 956 struct samsung_pinctrl_drv_data *drvdata) 957{ 958 struct samsung_pin_bank *bank = drvdata->pin_banks; 959 struct gpio_chip *gc; 960 int ret; 961 int i; 962 963 for (i = 0; i < drvdata->nr_banks; ++i, ++bank) { 964 bank->gpio_chip = samsung_gpiolib_chip; 965 966 gc = &bank->gpio_chip; 967 gc->base = -1; /* Dynamic allocation */ 968 gc->ngpio = bank->nr_pins; 969 gc->parent = &pdev->dev; 970 gc->fwnode = bank->fwnode; 971 gc->label = bank->name; 972 973 ret = devm_gpiochip_add_data(&pdev->dev, gc, bank); 974 if (ret) { 975 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n", 976 gc->label, ret); 977 return ret; 978 } 979 } 980 981 return 0; 982} 983 984static const struct samsung_pin_ctrl * 985samsung_pinctrl_get_soc_data_for_of_alias(struct platform_device *pdev) 986{ 987 struct device_node *node = pdev->dev.of_node; 988 const struct samsung_pinctrl_of_match_data *of_data; 989 int id; 990 991 id = of_alias_get_id(node, "pinctrl"); 992 if (id < 0) { 993 dev_err(&pdev->dev, "failed to get alias id\n"); 994 return NULL; 995 } 996 997 of_data = of_device_get_match_data(&pdev->dev); 998 if (id >= of_data->num_ctrl) { 999 dev_err(&pdev->dev, "invalid alias id %d\n", id); 1000 return NULL; 1001 } 1002 1003 return &(of_data->ctrl[id]); 1004} 1005 1006static void samsung_banks_node_put(struct samsung_pinctrl_drv_data *d) 1007{ 1008 struct samsung_pin_bank *bank; 1009 unsigned int i; 1010 1011 bank = d->pin_banks; 1012 for (i = 0; i < d->nr_banks; ++i, ++bank) 1013 fwnode_handle_put(bank->fwnode); 1014} 1015 1016/* 1017 * Iterate over all driver pin banks to find one matching the name of node, 1018 * skipping optional "-gpio" node suffix. When found, assign node to the bank. 1019 */ 1020static void samsung_banks_node_get(struct device *dev, struct samsung_pinctrl_drv_data *d) 1021{ 1022 const char *suffix = "-gpio-bank"; 1023 struct samsung_pin_bank *bank; 1024 struct fwnode_handle *child; 1025 /* Pin bank names are up to 4 characters */ 1026 char node_name[20]; 1027 unsigned int i; 1028 size_t len; 1029 1030 bank = d->pin_banks; 1031 for (i = 0; i < d->nr_banks; ++i, ++bank) { 1032 strscpy(node_name, bank->name, sizeof(node_name)); 1033 len = strlcat(node_name, suffix, sizeof(node_name)); 1034 if (len >= sizeof(node_name)) { 1035 dev_err(dev, "Too long pin bank name '%s', ignoring\n", 1036 bank->name); 1037 continue; 1038 } 1039 1040 for_each_gpiochip_node(dev, child) { 1041 struct device_node *np = to_of_node(child); 1042 1043 if (of_node_name_eq(np, node_name)) 1044 break; 1045 if (of_node_name_eq(np, bank->name)) 1046 break; 1047 } 1048 1049 if (child) 1050 bank->fwnode = child; 1051 else 1052 dev_warn(dev, "Missing node for bank %s - invalid DTB\n", 1053 bank->name); 1054 /* child reference dropped in samsung_drop_banks_of_node() */ 1055 } 1056} 1057 1058/* retrieve the soc specific data */ 1059static const struct samsung_pin_ctrl * 1060samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, 1061 struct platform_device *pdev) 1062{ 1063 const struct samsung_pin_bank_data *bdata; 1064 const struct samsung_pin_ctrl *ctrl; 1065 struct samsung_pin_bank *bank; 1066 struct resource *res; 1067 void __iomem *virt_base[SAMSUNG_PINCTRL_NUM_RESOURCES]; 1068 unsigned int i; 1069 1070 ctrl = samsung_pinctrl_get_soc_data_for_of_alias(pdev); 1071 if (!ctrl) 1072 return ERR_PTR(-ENOENT); 1073 1074 d->suspend = ctrl->suspend; 1075 d->resume = ctrl->resume; 1076 d->nr_banks = ctrl->nr_banks; 1077 d->pin_banks = devm_kcalloc(&pdev->dev, d->nr_banks, 1078 sizeof(*d->pin_banks), GFP_KERNEL); 1079 if (!d->pin_banks) 1080 return ERR_PTR(-ENOMEM); 1081 1082 if (ctrl->nr_ext_resources + 1 > SAMSUNG_PINCTRL_NUM_RESOURCES) 1083 return ERR_PTR(-EINVAL); 1084 1085 for (i = 0; i < ctrl->nr_ext_resources + 1; i++) { 1086 res = platform_get_resource(pdev, IORESOURCE_MEM, i); 1087 if (!res) { 1088 dev_err(&pdev->dev, "failed to get mem%d resource\n", i); 1089 return ERR_PTR(-EINVAL); 1090 } 1091 virt_base[i] = devm_ioremap(&pdev->dev, res->start, 1092 resource_size(res)); 1093 if (!virt_base[i]) { 1094 dev_err(&pdev->dev, "failed to ioremap %pR\n", res); 1095 return ERR_PTR(-EIO); 1096 } 1097 } 1098 1099 bank = d->pin_banks; 1100 bdata = ctrl->pin_banks; 1101 for (i = 0; i < ctrl->nr_banks; ++i, ++bdata, ++bank) { 1102 bank->type = bdata->type; 1103 bank->pctl_offset = bdata->pctl_offset; 1104 bank->nr_pins = bdata->nr_pins; 1105 bank->eint_func = bdata->eint_func; 1106 bank->eint_type = bdata->eint_type; 1107 bank->eint_mask = bdata->eint_mask; 1108 bank->eint_offset = bdata->eint_offset; 1109 bank->eint_con_offset = bdata->eint_con_offset; 1110 bank->eint_mask_offset = bdata->eint_mask_offset; 1111 bank->eint_pend_offset = bdata->eint_pend_offset; 1112 bank->name = bdata->name; 1113 1114 raw_spin_lock_init(&bank->slock); 1115 bank->drvdata = d; 1116 bank->pin_base = d->nr_pins; 1117 d->nr_pins += bank->nr_pins; 1118 1119 bank->eint_base = virt_base[0]; 1120 bank->pctl_base = virt_base[bdata->pctl_res_idx]; 1121 } 1122 /* 1123 * Legacy platforms should provide only one resource with IO memory. 1124 * Store it as virt_base because legacy driver needs to access it 1125 * through samsung_pinctrl_drv_data. 1126 */ 1127 d->virt_base = virt_base[0]; 1128 1129 samsung_banks_node_get(&pdev->dev, d); 1130 1131 return ctrl; 1132} 1133 1134static int samsung_pinctrl_probe(struct platform_device *pdev) 1135{ 1136 struct samsung_pinctrl_drv_data *drvdata; 1137 const struct samsung_pin_ctrl *ctrl; 1138 struct device *dev = &pdev->dev; 1139 int ret; 1140 1141 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); 1142 if (!drvdata) 1143 return -ENOMEM; 1144 1145 ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev); 1146 if (IS_ERR(ctrl)) { 1147 dev_err(&pdev->dev, "driver data not available\n"); 1148 return PTR_ERR(ctrl); 1149 } 1150 drvdata->dev = dev; 1151 1152 ret = platform_get_irq_optional(pdev, 0); 1153 if (ret < 0 && ret != -ENXIO) 1154 return ret; 1155 if (ret > 0) 1156 drvdata->irq = ret; 1157 1158 if (ctrl->retention_data) { 1159 drvdata->retention_ctrl = ctrl->retention_data->init(drvdata, 1160 ctrl->retention_data); 1161 if (IS_ERR(drvdata->retention_ctrl)) { 1162 ret = PTR_ERR(drvdata->retention_ctrl); 1163 goto err_put_banks; 1164 } 1165 } 1166 1167 ret = samsung_pinctrl_register(pdev, drvdata); 1168 if (ret) 1169 goto err_put_banks; 1170 1171 if (ctrl->eint_gpio_init) 1172 ctrl->eint_gpio_init(drvdata); 1173 if (ctrl->eint_wkup_init) 1174 ctrl->eint_wkup_init(drvdata); 1175 1176 ret = samsung_gpiolib_register(pdev, drvdata); 1177 if (ret) 1178 goto err_unregister; 1179 1180 ret = pinctrl_enable(drvdata->pctl_dev); 1181 if (ret) 1182 goto err_unregister; 1183 1184 platform_set_drvdata(pdev, drvdata); 1185 1186 return 0; 1187 1188err_unregister: 1189 samsung_pinctrl_unregister(pdev, drvdata); 1190err_put_banks: 1191 samsung_banks_node_put(drvdata); 1192 return ret; 1193} 1194 1195/* 1196 * samsung_pinctrl_suspend - save pinctrl state for suspend 1197 * 1198 * Save data for all banks handled by this device. 1199 */ 1200static int __maybe_unused samsung_pinctrl_suspend(struct device *dev) 1201{ 1202 struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev); 1203 int i; 1204 1205 for (i = 0; i < drvdata->nr_banks; i++) { 1206 struct samsung_pin_bank *bank = &drvdata->pin_banks[i]; 1207 const void __iomem *reg = bank->pctl_base + bank->pctl_offset; 1208 const u8 *offs = bank->type->reg_offset; 1209 const u8 *widths = bank->type->fld_width; 1210 enum pincfg_type type; 1211 1212 /* Registers without a powerdown config aren't lost */ 1213 if (!widths[PINCFG_TYPE_CON_PDN]) 1214 continue; 1215 1216 for (type = 0; type < PINCFG_TYPE_NUM; type++) 1217 if (widths[type]) 1218 bank->pm_save[type] = readl(reg + offs[type]); 1219 1220 if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) { 1221 /* Some banks have two config registers */ 1222 bank->pm_save[PINCFG_TYPE_NUM] = 1223 readl(reg + offs[PINCFG_TYPE_FUNC] + 4); 1224 pr_debug("Save %s @ %p (con %#010x %08x)\n", 1225 bank->name, reg, 1226 bank->pm_save[PINCFG_TYPE_FUNC], 1227 bank->pm_save[PINCFG_TYPE_NUM]); 1228 } else { 1229 pr_debug("Save %s @ %p (con %#010x)\n", bank->name, 1230 reg, bank->pm_save[PINCFG_TYPE_FUNC]); 1231 } 1232 } 1233 1234 if (drvdata->suspend) 1235 drvdata->suspend(drvdata); 1236 if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable) 1237 drvdata->retention_ctrl->enable(drvdata); 1238 1239 return 0; 1240} 1241 1242/* 1243 * samsung_pinctrl_resume - restore pinctrl state from suspend 1244 * 1245 * Restore one of the banks that was saved during suspend. 1246 * 1247 * We don't bother doing anything complicated to avoid glitching lines since 1248 * we're called before pad retention is turned off. 1249 */ 1250static int __maybe_unused samsung_pinctrl_resume(struct device *dev) 1251{ 1252 struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev); 1253 int i; 1254 1255 if (drvdata->resume) 1256 drvdata->resume(drvdata); 1257 1258 for (i = 0; i < drvdata->nr_banks; i++) { 1259 struct samsung_pin_bank *bank = &drvdata->pin_banks[i]; 1260 void __iomem *reg = bank->pctl_base + bank->pctl_offset; 1261 const u8 *offs = bank->type->reg_offset; 1262 const u8 *widths = bank->type->fld_width; 1263 enum pincfg_type type; 1264 1265 /* Registers without a powerdown config aren't lost */ 1266 if (!widths[PINCFG_TYPE_CON_PDN]) 1267 continue; 1268 1269 if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) { 1270 /* Some banks have two config registers */ 1271 pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n", 1272 bank->name, reg, 1273 readl(reg + offs[PINCFG_TYPE_FUNC]), 1274 readl(reg + offs[PINCFG_TYPE_FUNC] + 4), 1275 bank->pm_save[PINCFG_TYPE_FUNC], 1276 bank->pm_save[PINCFG_TYPE_NUM]); 1277 writel(bank->pm_save[PINCFG_TYPE_NUM], 1278 reg + offs[PINCFG_TYPE_FUNC] + 4); 1279 } else { 1280 pr_debug("%s @ %p (con %#010x => %#010x)\n", bank->name, 1281 reg, readl(reg + offs[PINCFG_TYPE_FUNC]), 1282 bank->pm_save[PINCFG_TYPE_FUNC]); 1283 } 1284 for (type = 0; type < PINCFG_TYPE_NUM; type++) 1285 if (widths[type]) 1286 writel(bank->pm_save[type], reg + offs[type]); 1287 } 1288 1289 if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable) 1290 drvdata->retention_ctrl->disable(drvdata); 1291 1292 return 0; 1293} 1294 1295static const struct of_device_id samsung_pinctrl_dt_match[] = { 1296#ifdef CONFIG_PINCTRL_EXYNOS_ARM 1297 { .compatible = "samsung,exynos3250-pinctrl", 1298 .data = &exynos3250_of_data }, 1299 { .compatible = "samsung,exynos4210-pinctrl", 1300 .data = &exynos4210_of_data }, 1301 { .compatible = "samsung,exynos4x12-pinctrl", 1302 .data = &exynos4x12_of_data }, 1303 { .compatible = "samsung,exynos5250-pinctrl", 1304 .data = &exynos5250_of_data }, 1305 { .compatible = "samsung,exynos5260-pinctrl", 1306 .data = &exynos5260_of_data }, 1307 { .compatible = "samsung,exynos5410-pinctrl", 1308 .data = &exynos5410_of_data }, 1309 { .compatible = "samsung,exynos5420-pinctrl", 1310 .data = &exynos5420_of_data }, 1311 { .compatible = "samsung,s5pv210-pinctrl", 1312 .data = &s5pv210_of_data }, 1313#endif 1314#ifdef CONFIG_PINCTRL_EXYNOS_ARM64 1315 { .compatible = "google,gs101-pinctrl", 1316 .data = &gs101_of_data }, 1317 { .compatible = "samsung,exynos5433-pinctrl", 1318 .data = &exynos5433_of_data }, 1319 { .compatible = "samsung,exynos7-pinctrl", 1320 .data = &exynos7_of_data }, 1321 { .compatible = "samsung,exynos7885-pinctrl", 1322 .data = &exynos7885_of_data }, 1323 { .compatible = "samsung,exynos850-pinctrl", 1324 .data = &exynos850_of_data }, 1325 { .compatible = "samsung,exynosautov9-pinctrl", 1326 .data = &exynosautov9_of_data }, 1327 { .compatible = "samsung,exynosautov920-pinctrl", 1328 .data = &exynosautov920_of_data }, 1329 { .compatible = "tesla,fsd-pinctrl", 1330 .data = &fsd_of_data }, 1331#endif 1332#ifdef CONFIG_PINCTRL_S3C64XX 1333 { .compatible = "samsung,s3c64xx-pinctrl", 1334 .data = &s3c64xx_of_data }, 1335#endif 1336 {}, 1337}; 1338 1339static const struct dev_pm_ops samsung_pinctrl_pm_ops = { 1340 SET_LATE_SYSTEM_SLEEP_PM_OPS(samsung_pinctrl_suspend, 1341 samsung_pinctrl_resume) 1342}; 1343 1344static struct platform_driver samsung_pinctrl_driver = { 1345 .probe = samsung_pinctrl_probe, 1346 .driver = { 1347 .name = "samsung-pinctrl", 1348 .of_match_table = samsung_pinctrl_dt_match, 1349 .suppress_bind_attrs = true, 1350 .pm = &samsung_pinctrl_pm_ops, 1351 }, 1352}; 1353 1354static int __init samsung_pinctrl_drv_register(void) 1355{ 1356 return platform_driver_register(&samsung_pinctrl_driver); 1357} 1358postcore_initcall(samsung_pinctrl_drv_register); 1359