drivers/pinctrl/mediatek/pinctrl-moore.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * MediaTek Pinctrl Moore Driver, which implement the generic dt-binding
   4  * pinctrl-bindings.txt for MediaTek SoC.
   5  *
   6  * Copyright (C) 2017-2018 MediaTek Inc.
   7  * Author: Sean Wang <sean.wang@mediatek.com>
   8  *
   9  */
  10
  11 #include <dt-bindings/pinctrl/mt65xx.h>
  12 #include <linux/gpio/driver.h>
  13
  14 #include <linux/pinctrl/consumer.h>
  15
  16 #include "pinctrl-moore.h"
  17
  18 #define PINCTRL_PINCTRL_DEV             KBUILD_MODNAME
  19
  20 /* Custom pinconf parameters */
  21 #define MTK_PIN_CONFIG_TDSEL    (PIN_CONFIG_END + 1)
  22 #define MTK_PIN_CONFIG_RDSEL    (PIN_CONFIG_END + 2)
  23 #define MTK_PIN_CONFIG_PU_ADV   (PIN_CONFIG_END + 3)
  24 #define MTK_PIN_CONFIG_PD_ADV   (PIN_CONFIG_END + 4)
  25
  26 static const struct pinconf_generic_params mtk_custom_bindings[] = {
  27         {"mediatek,tdsel",      MTK_PIN_CONFIG_TDSEL,           0},
  28         {"mediatek,rdsel",      MTK_PIN_CONFIG_RDSEL,           0},
  29         {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV,         1},
  30         {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV,       1},
  31 };
  32
  33 #ifdef CONFIG_DEBUG_FS
  34 static const struct pin_config_item mtk_conf_items[] = {
  35         PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true),
  36         PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true),
  37         PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true),
  38         PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true),
  39 };
  40 #endif
  41
  42 static int mtk_pinmux_set_mux(struct pinctrl_dev *pctldev,
  43                               unsigned int selector, unsigned int group)
  44 {
  45         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  46         struct function_desc *func;
  47         struct group_desc *grp;
  48         int i, err;
  49
  50         func = pinmux_generic_get_function(pctldev, selector);
  51         if (!func)
  52                 return -EINVAL;
  53
  54         grp = pinctrl_generic_get_group(pctldev, group);
  55         if (!grp)
  56                 return -EINVAL;
  57
  58         dev_dbg(pctldev->dev, "enable function %s group %s\n",
  59                 func->name, grp->grp.name);
  60
  61         for (i = 0; i < grp->grp.npins; i++) {
  62                 const struct mtk_pin_desc *desc;
  63                 int *pin_modes = grp->data;
  64                 int pin = grp->grp.pins[i];
  65
  66                 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  67                 if (!desc->name)
  68                         return -ENOTSUPP;
  69
  70                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
  71                                        pin_modes[i]);
  72
  73                 if (err)
  74                         return err;
  75         }
  76
  77         return 0;
  78 }
  79
  80 static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
  81                                           struct pinctrl_gpio_range *range,
  82                                           unsigned int pin)
  83 {
  84         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  85         const struct mtk_pin_desc *desc;
  86
  87         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  88         if (!desc->name)
  89                 return -ENOTSUPP;
  90
  91         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
  92                                 hw->soc->gpio_m);
  93 }
  94
  95 static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
  96                                          struct pinctrl_gpio_range *range,
  97                                          unsigned int pin, bool input)
  98 {
  99         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 100         const struct mtk_pin_desc *desc;
 101
 102         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
 103         if (!desc->name)
 104                 return -ENOTSUPP;
 105
 106         /* hardware would take 0 as input direction */
 107         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
 108 }
 109
 110 static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
 111                            unsigned int pin, unsigned long *config)
 112 {
 113         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 114         u32 param = pinconf_to_config_param(*config);
 115         int val, val2, err, pullup, reg, ret = 1;
 116         const struct mtk_pin_desc *desc;
 117
 118         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
 119         if (!desc->name)
 120                 return -ENOTSUPP;
 121
 122         switch (param) {
 123         case PIN_CONFIG_BIAS_DISABLE:
 124                 if (hw->soc->bias_get_combo) {
 125                         err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
 126                         if (err)
 127                                 return err;
 128                         if (ret != MTK_PUPD_SET_R1R0_00 && ret != MTK_DISABLE)
 129                                 return -EINVAL;
 130                 } else if (hw->soc->bias_disable_get) {
 131                         err = hw->soc->bias_disable_get(hw, desc, &ret);
 132                         if (err)
 133                                 return err;
 134                 } else {
 135                         return -ENOTSUPP;
 136                 }
 137                 break;
 138         case PIN_CONFIG_BIAS_PULL_UP:
 139                 if (hw->soc->bias_get_combo) {
 140                         err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
 141                         if (err)
 142                                 return err;
 143                         if (ret == MTK_PUPD_SET_R1R0_00 || ret == MTK_DISABLE)
 144                                 return -EINVAL;
 145                         if (!pullup)
 146                                 return -EINVAL;
 147                 } else if (hw->soc->bias_get) {
 148                         err = hw->soc->bias_get(hw, desc, 1, &ret);
 149                         if (err)
 150                                 return err;
 151                 } else {
 152                         return -ENOTSUPP;
 153                 }
 154                 break;
 155         case PIN_CONFIG_BIAS_PULL_DOWN:
 156                 if (hw->soc->bias_get_combo) {
 157                         err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
 158                         if (err)
 159                                 return err;
 160                         if (ret == MTK_PUPD_SET_R1R0_00 || ret == MTK_DISABLE)
 161                                 return -EINVAL;
 162                         if (pullup)
 163                                 return -EINVAL;
 164                 } else if (hw->soc->bias_get) {
 165                         err = hw->soc->bias_get(hw, desc, 0, &ret);
 166                         if (err)
 167                                 return err;
 168                 } else {
 169                         return -ENOTSUPP;
 170                 }
 171                 break;
 172         case PIN_CONFIG_SLEW_RATE:
 173                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &val);
 174                 if (err)
 175                         return err;
 176
 177                 if (!val)
 178                         return -EINVAL;
 179
 180                 break;
 181         case PIN_CONFIG_INPUT_ENABLE:
 182         case PIN_CONFIG_OUTPUT_ENABLE:
 183                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
 184                 if (err)
 185                         return err;
 186
 187                 /* HW takes input mode as zero; output mode as non-zero */
 188                 if ((val && param == PIN_CONFIG_INPUT_ENABLE) ||
 189                     (!val && param == PIN_CONFIG_OUTPUT_ENABLE))
 190                         return -EINVAL;
 191
 192                 break;
 193         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 194                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
 195                 if (err)
 196                         return err;
 197
 198                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &val2);
 199                 if (err)
 200                         return err;
 201
 202                 if (val || !val2)
 203                         return -EINVAL;
 204
 205                 break;
 206         case PIN_CONFIG_DRIVE_STRENGTH:
 207                 if (hw->soc->drive_get) {
 208                         err = hw->soc->drive_get(hw, desc, &ret);
 209                         if (err)
 210                                 return err;
 211                 } else {
 212                         err = -ENOTSUPP;
 213                 }
 214                 break;
 215         case MTK_PIN_CONFIG_TDSEL:
 216         case MTK_PIN_CONFIG_RDSEL:
 217                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 218                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 219
 220                 err = mtk_hw_get_value(hw, desc, reg, &val);
 221                 if (err)
 222                         return err;
 223
 224                 ret = val;
 225
 226                 break;
 227         case MTK_PIN_CONFIG_PU_ADV:
 228         case MTK_PIN_CONFIG_PD_ADV:
 229                 if (hw->soc->adv_pull_get) {
 230                         bool pullup;
 231
 232                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 233                         err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
 234                         if (err)
 235                                 return err;
 236                 } else {
 237                         return -ENOTSUPP;
 238                 }
 239                 break;
 240         default:
 241                 return -ENOTSUPP;
 242         }
 243
 244         *config = pinconf_to_config_packed(param, ret);
 245
 246         return 0;
 247 }
 248
 249 static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 250                            unsigned long *configs, unsigned int num_configs)
 251 {
 252         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 253         const struct mtk_pin_desc *desc;
 254         u32 reg, param, arg;
 255         int cfg, err = 0;
 256
 257         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
 258         if (!desc->name)
 259                 return -ENOTSUPP;
 260
 261         for (cfg = 0; cfg < num_configs; cfg++) {
 262                 param = pinconf_to_config_param(configs[cfg]);
 263                 arg = pinconf_to_config_argument(configs[cfg]);
 264
 265                 switch (param) {
 266                 case PIN_CONFIG_BIAS_DISABLE:
 267                         if (hw->soc->bias_set_combo) {
 268                                 err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
 269                                 if (err)
 270                                         return err;
 271                         } else if (hw->soc->bias_disable_set) {
 272                                 err = hw->soc->bias_disable_set(hw, desc);
 273                                 if (err)
 274                                         return err;
 275                         } else {
 276                                 return -ENOTSUPP;
 277                         }
 278                         break;
 279                 case PIN_CONFIG_BIAS_PULL_UP:
 280                         if (hw->soc->bias_set_combo) {
 281                                 err = hw->soc->bias_set_combo(hw, desc, 1, arg);
 282                                 if (err)
 283                                         return err;
 284                         } else if (hw->soc->bias_set) {
 285                                 err = hw->soc->bias_set(hw, desc, 1);
 286                                 if (err)
 287                                         return err;
 288                         } else {
 289                                 return -ENOTSUPP;
 290                         }
 291                         break;
 292                 case PIN_CONFIG_BIAS_PULL_DOWN:
 293                         if (hw->soc->bias_set_combo) {
 294                                 err = hw->soc->bias_set_combo(hw, desc, 0, arg);
 295                                 if (err)
 296                                         return err;
 297                         } else if (hw->soc->bias_set) {
 298                                 err = hw->soc->bias_set(hw, desc, 0);
 299                                 if (err)
 300                                         return err;
 301                         } else {
 302                                 return -ENOTSUPP;
 303                         }
 304                         break;
 305                 case PIN_CONFIG_OUTPUT_ENABLE:
 306                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
 307                                                MTK_DISABLE);
 308                         if (err)
 309                                 goto err;
 310
 311                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 312                                                MTK_OUTPUT);
 313                         if (err)
 314                                 goto err;
 315                         break;
 316                 case PIN_CONFIG_INPUT_ENABLE:
 317
 318                         if (hw->soc->ies_present) {
 319                                 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES,
 320                                                  MTK_ENABLE);
 321                         }
 322
 323                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 324                                                MTK_INPUT);
 325                         if (err)
 326                                 goto err;
 327                         break;
 328                 case PIN_CONFIG_SLEW_RATE:
 329                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR,
 330                                                arg);
 331                         if (err)
 332                                 goto err;
 333
 334                         break;
 335                 case PIN_CONFIG_OUTPUT:
 336                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 337                                                MTK_OUTPUT);
 338                         if (err)
 339                                 goto err;
 340
 341                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
 342                                                arg);
 343                         if (err)
 344                                 goto err;
 345                         break;
 346                 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 347                         /* arg = 1: Input mode & SMT enable ;
 348                          * arg = 0: Output mode & SMT disable
 349                          */
 350                         arg = arg ? 2 : 1;
 351                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 352                                                arg & 1);
 353                         if (err)
 354                                 goto err;
 355
 356                         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
 357                                                !!(arg & 2));
 358                         if (err)
 359                                 goto err;
 360                         break;
 361                 case PIN_CONFIG_DRIVE_STRENGTH:
 362                         if (hw->soc->drive_set) {
 363                                 err = hw->soc->drive_set(hw, desc, arg);
 364                                 if (err)
 365                                         return err;
 366                         } else {
 367                                 err = -ENOTSUPP;
 368                         }
 369                         break;
 370                 case MTK_PIN_CONFIG_TDSEL:
 371                 case MTK_PIN_CONFIG_RDSEL:
 372                         reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 373                                PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 374
 375                         err = mtk_hw_set_value(hw, desc, reg, arg);
 376                         if (err)
 377                                 goto err;
 378                         break;
 379                 case MTK_PIN_CONFIG_PU_ADV:
 380                 case MTK_PIN_CONFIG_PD_ADV:
 381                         if (hw->soc->adv_pull_set) {
 382                                 bool pullup;
 383
 384                                 pullup = param == MTK_PIN_CONFIG_PU_ADV;
 385                                 err = hw->soc->adv_pull_set(hw, desc, pullup,
 386                                                             arg);
 387                                 if (err)
 388                                         return err;
 389                         } else {
 390                                 return -ENOTSUPP;
 391                         }
 392                         break;
 393                 default:
 394                         err = -ENOTSUPP;
 395                 }
 396         }
 397 err:
 398         return err;
 399 }
 400
 401 static int mtk_pinconf_group_get(struct pinctrl_dev *pctldev,
 402                                  unsigned int group, unsigned long *config)
 403 {
 404         const unsigned int *pins;
 405         unsigned int i, npins, old = 0;
 406         int ret;
 407
 408         ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
 409         if (ret)
 410                 return ret;
 411
 412         for (i = 0; i < npins; i++) {
 413                 if (mtk_pinconf_get(pctldev, pins[i], config))
 414                         return -ENOTSUPP;
 415
 416                 /* configs do not match between two pins */
 417                 if (i && old != *config)
 418                         return -ENOTSUPP;
 419
 420                 old = *config;
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int mtk_pinconf_group_set(struct pinctrl_dev *pctldev,
 427                                  unsigned int group, unsigned long *configs,
 428                                  unsigned int num_configs)
 429 {
 430         const unsigned int *pins;
 431         unsigned int i, npins;
 432         int ret;
 433
 434         ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
 435         if (ret)
 436                 return ret;
 437
 438         for (i = 0; i < npins; i++) {
 439                 ret = mtk_pinconf_set(pctldev, pins[i], configs, num_configs);
 440                 if (ret)
 441                         return ret;
 442         }
 443
 444         return 0;
 445 }
 446
 447 static const struct pinctrl_ops mtk_pctlops = {
 448         .get_groups_count = pinctrl_generic_get_group_count,
 449         .get_group_name = pinctrl_generic_get_group_name,
 450         .get_group_pins = pinctrl_generic_get_group_pins,
 451         .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
 452         .dt_free_map = pinconf_generic_dt_free_map,
 453 };
 454
 455 static const struct pinmux_ops mtk_pmxops = {
 456         .get_functions_count = pinmux_generic_get_function_count,
 457         .get_function_name = pinmux_generic_get_function_name,
 458         .get_function_groups = pinmux_generic_get_function_groups,
 459         .set_mux = mtk_pinmux_set_mux,
 460         .gpio_request_enable = mtk_pinmux_gpio_request_enable,
 461         .gpio_set_direction = mtk_pinmux_gpio_set_direction,
 462         .strict = true,
 463 };
 464
 465 static const struct pinconf_ops mtk_confops = {
 466         .is_generic = true,
 467         .pin_config_get = mtk_pinconf_get,
 468         .pin_config_set = mtk_pinconf_set,
 469         .pin_config_group_get = mtk_pinconf_group_get,
 470         .pin_config_group_set = mtk_pinconf_group_set,
 471         .pin_config_config_dbg_show = pinconf_generic_dump_config,
 472 };
 473
 474 static struct pinctrl_desc mtk_desc = {
 475         .name = PINCTRL_PINCTRL_DEV,
 476         .pctlops = &mtk_pctlops,
 477         .pmxops = &mtk_pmxops,
 478         .confops = &mtk_confops,
 479         .owner = THIS_MODULE,
 480 };
 481
 482 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 483 {
 484         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 485         const struct mtk_pin_desc *desc;
 486         int value, err;
 487
 488         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 489         if (!desc->name)
 490                 return -ENOTSUPP;
 491
 492         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
 493         if (err)
 494                 return err;
 495
 496         return !!value;
 497 }
 498
 499 static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 500 {
 501         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 502         const struct mtk_pin_desc *desc;
 503
 504         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 505         if (!desc->name) {
 506                 dev_err(hw->dev, "Failed to set gpio %d\n", gpio);
 507                 return;
 508         }
 509
 510         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
 511 }
 512
 513 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
 514                                      int value)
 515 {
 516         mtk_gpio_set(chip, gpio, value);
 517
 518         return pinctrl_gpio_direction_output(chip, gpio);
 519 }
 520
 521 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
 522 {
 523         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 524         const struct mtk_pin_desc *desc;
 525
 526         if (!hw->eint)
 527                 return -ENOTSUPP;
 528
 529         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 530
 531         if (desc->eint.eint_n == (u16)EINT_NA)
 532                 return -ENOTSUPP;
 533
 534         return mtk_eint_find_irq(hw->eint, desc->eint.eint_n);
 535 }
 536
 537 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
 538                                unsigned long config)
 539 {
 540         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 541         const struct mtk_pin_desc *desc;
 542         u32 debounce;
 543
 544         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 545         if (!desc->name)
 546                 return -ENOTSUPP;
 547
 548         if (!hw->eint ||
 549             pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
 550             desc->eint.eint_n == (u16)EINT_NA)
 551                 return -ENOTSUPP;
 552
 553         debounce = pinconf_to_config_argument(config);
 554
 555         return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
 556 }
 557
 558 static int mtk_build_gpiochip(struct mtk_pinctrl *hw)
 559 {
 560         struct gpio_chip *chip = &hw->chip;
 561         int ret;
 562
 563         chip->label             = PINCTRL_PINCTRL_DEV;
 564         chip->parent            = hw->dev;
 565         chip->request           = gpiochip_generic_request;
 566         chip->free              = gpiochip_generic_free;
 567         chip->direction_input   = pinctrl_gpio_direction_input;
 568         chip->direction_output  = mtk_gpio_direction_output;
 569         chip->get               = mtk_gpio_get;
 570         chip->set               = mtk_gpio_set;
 571         chip->to_irq            = mtk_gpio_to_irq;
 572         chip->set_config        = mtk_gpio_set_config;
 573         chip->base              = -1;
 574         chip->ngpio             = hw->soc->npins;
 575
 576         ret = gpiochip_add_data(chip, hw);
 577         if (ret < 0)
 578                 return ret;
 579
 580         /* Just for backward compatible for these old pinctrl nodes without
 581          * "gpio-ranges" property. Otherwise, called directly from a
 582          * DeviceTree-supported pinctrl driver is DEPRECATED.
 583          * Please see Section 2.1 of
 584          * Documentation/devicetree/bindings/gpio/gpio.txt on how to
 585          * bind pinctrl and gpio drivers via the "gpio-ranges" property.
 586          */
 587         if (!of_property_present(hw->dev->of_node, "gpio-ranges")) {
 588                 ret = gpiochip_add_pin_range(chip, dev_name(hw->dev), 0, 0,
 589                                              chip->ngpio);
 590                 if (ret < 0) {
 591                         gpiochip_remove(chip);
 592                         return ret;
 593                 }
 594         }
 595
 596         return 0;
 597 }
 598
 599 static int mtk_build_groups(struct mtk_pinctrl *hw)
 600 {
 601         int err, i;
 602
 603         for (i = 0; i < hw->soc->ngrps; i++) {
 604                 const struct group_desc *group = hw->soc->grps + i;
 605                 const struct pingroup *grp = &group->grp;
 606
 607                 err = pinctrl_generic_add_group(hw->pctrl, grp->name, grp->pins, grp->npins,
 608                                                 group->data);
 609                 if (err < 0) {
 610                         dev_err(hw->dev, "Failed to register group %s\n", grp->name);
 611                         return err;
 612                 }
 613         }
 614
 615         return 0;
 616 }
 617
 618 static int mtk_build_functions(struct mtk_pinctrl *hw)
 619 {
 620         int i, err;
 621
 622         for (i = 0; i < hw->soc->nfuncs ; i++) {
 623                 const struct function_desc *func = hw->soc->funcs + i;
 624
 625                 err = pinmux_generic_add_function(hw->pctrl, func->name,
 626                                                   func->group_names,
 627                                                   func->num_group_names,
 628                                                   func->data);
 629                 if (err < 0) {
 630                         dev_err(hw->dev, "Failed to register function %s\n",
 631                                 func->name);
 632                         return err;
 633                 }
 634         }
 635
 636         return 0;
 637 }
 638
 639 int mtk_moore_pinctrl_probe(struct platform_device *pdev,
 640                             const struct mtk_pin_soc *soc)
 641 {
 642         struct device *dev = &pdev->dev;
 643         struct pinctrl_pin_desc *pins;
 644         struct mtk_pinctrl *hw;
 645         int err, i;
 646
 647         hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
 648         if (!hw)
 649                 return -ENOMEM;
 650
 651         hw->soc = soc;
 652         hw->dev = &pdev->dev;
 653
 654         if (!hw->soc->nbase_names)
 655                 return dev_err_probe(dev, -EINVAL,
 656                         "SoC should be assigned at least one register base\n");
 657
 658         hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names,
 659                                       sizeof(*hw->base), GFP_KERNEL);
 660         if (!hw->base)
 661                 return -ENOMEM;
 662
 663         for (i = 0; i < hw->soc->nbase_names; i++) {
 664                 hw->base[i] = devm_platform_ioremap_resource_byname(pdev,
 665                                                 hw->soc->base_names[i]);
 666                 if (IS_ERR(hw->base[i]))
 667                         return PTR_ERR(hw->base[i]);
 668         }
 669
 670         hw->nbase = hw->soc->nbase_names;
 671
 672         spin_lock_init(&hw->lock);
 673
 674         /* Copy from internal struct mtk_pin_desc to register to the core */
 675         pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins),
 676                                   GFP_KERNEL);
 677         if (!pins)
 678                 return -ENOMEM;
 679
 680         for (i = 0; i < hw->soc->npins; i++) {
 681                 pins[i].number = hw->soc->pins[i].number;
 682                 pins[i].name = hw->soc->pins[i].name;
 683         }
 684
 685         /* Setup pins descriptions per SoC types */
 686         mtk_desc.pins = (const struct pinctrl_pin_desc *)pins;
 687         mtk_desc.npins = hw->soc->npins;
 688         mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings);
 689         mtk_desc.custom_params = mtk_custom_bindings;
 690 #ifdef CONFIG_DEBUG_FS
 691         mtk_desc.custom_conf_items = mtk_conf_items;
 692 #endif
 693
 694         err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
 695                                              &hw->pctrl);
 696         if (err)
 697                 return err;
 698
 699         /* Setup groups descriptions per SoC types */
 700         err = mtk_build_groups(hw);
 701         if (err)
 702                 return dev_err_probe(dev, err, "Failed to build groups\n");
 703
 704         /* Setup functions descriptions per SoC types */
 705         err = mtk_build_functions(hw);
 706         if (err)
 707                 return dev_err_probe(dev, err, "Failed to build functions\n");
 708
 709         /* For able to make pinctrl_claim_hogs, we must not enable pinctrl
 710          * until all groups and functions are being added one.
 711          */
 712         err = pinctrl_enable(hw->pctrl);
 713         if (err)
 714                 return err;
 715
 716         err = mtk_build_eint(hw, pdev);
 717         if (err)
 718                 dev_warn(&pdev->dev,
 719                          "Failed to add EINT, but pinctrl still can work\n");
 720
 721         /* Build gpiochip should be after pinctrl_enable is done */
 722         err = mtk_build_gpiochip(hw);
 723         if (err)
 724                 return dev_err_probe(dev, err, "Failed to add gpio_chip\n");
 725
 726         platform_set_drvdata(pdev, hw);
 727
 728         return 0;
 729 }