drivers/pinctrl/mediatek/pinctrl-paris.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * MediaTek Pinctrl Paris Driver, which implement the vendor per-pin
   4  * bindings for MediaTek SoC.
   5  *
   6  * Copyright (C) 2018 MediaTek Inc.
   7  * Author: Sean Wang <sean.wang@mediatek.com>
   8  *         Zhiyong Tao <zhiyong.tao@mediatek.com>
   9  *         Hongzhou.Yang <hongzhou.yang@mediatek.com>
  10  */
  11
  12 #include <linux/gpio/driver.h>
  13 #include <dt-bindings/pinctrl/mt65xx.h>
  14 #include "pinctrl-paris.h"
  15
  16 #define PINCTRL_PINCTRL_DEV     KBUILD_MODNAME
  17
  18 /* Custom pinconf parameters */
  19 #define MTK_PIN_CONFIG_TDSEL    (PIN_CONFIG_END + 1)
  20 #define MTK_PIN_CONFIG_RDSEL    (PIN_CONFIG_END + 2)
  21 #define MTK_PIN_CONFIG_PU_ADV   (PIN_CONFIG_END + 3)
  22 #define MTK_PIN_CONFIG_PD_ADV   (PIN_CONFIG_END + 4)
  23 #define MTK_PIN_CONFIG_DRV_ADV  (PIN_CONFIG_END + 5)
  24
  25 static const struct pinconf_generic_params mtk_custom_bindings[] = {
  26         {"mediatek,tdsel",      MTK_PIN_CONFIG_TDSEL,           0},
  27         {"mediatek,rdsel",      MTK_PIN_CONFIG_RDSEL,           0},
  28         {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV,         1},
  29         {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV,       1},
  30         {"mediatek,drive-strength-adv", MTK_PIN_CONFIG_DRV_ADV, 2},
  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         PCONFDUMP(MTK_PIN_CONFIG_DRV_ADV, "drive-strength-adv", NULL, true),
  40 };
  41 #endif
  42
  43 static const char * const mtk_gpio_functions[] = {
  44         "func0", "func1", "func2", "func3",
  45         "func4", "func5", "func6", "func7",
  46         "func8", "func9", "func10", "func11",
  47         "func12", "func13", "func14", "func15",
  48 };
  49
  50 static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
  51                                           struct pinctrl_gpio_range *range,
  52                                           unsigned int pin)
  53 {
  54         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  55         const struct mtk_pin_desc *desc;
  56
  57         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  58
  59         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
  60                                 hw->soc->gpio_m);
  61 }
  62
  63 static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
  64                                          struct pinctrl_gpio_range *range,
  65                                          unsigned int pin, bool input)
  66 {
  67         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  68         const struct mtk_pin_desc *desc;
  69
  70         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  71
  72         /* hardware would take 0 as input direction */
  73         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
  74 }
  75
  76 static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
  77                            unsigned int pin, unsigned long *config)
  78 {
  79         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
  80         u32 param = pinconf_to_config_param(*config);
  81         int pullup, err, reg, ret = 1;
  82         const struct mtk_pin_desc *desc;
  83
  84         if (pin >= hw->soc->npins) {
  85                 err = -EINVAL;
  86                 goto out;
  87         }
  88         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
  89
  90         switch (param) {
  91         case PIN_CONFIG_BIAS_DISABLE:
  92         case PIN_CONFIG_BIAS_PULL_UP:
  93         case PIN_CONFIG_BIAS_PULL_DOWN:
  94                 if (hw->soc->bias_get_combo) {
  95                         err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
  96                         if (err)
  97                                 goto out;
  98                         if (param == PIN_CONFIG_BIAS_DISABLE) {
  99                                 if (ret == MTK_PUPD_SET_R1R0_00)
 100                                         ret = MTK_DISABLE;
 101                         } else if (param == PIN_CONFIG_BIAS_PULL_UP) {
 102                                 /* When desire to get pull-up value, return
 103                                  *  error if current setting is pull-down
 104                                  */
 105                                 if (!pullup)
 106                                         err = -EINVAL;
 107                         } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) {
 108                                 /* When desire to get pull-down value, return
 109                                  *  error if current setting is pull-up
 110                                  */
 111                                 if (pullup)
 112                                         err = -EINVAL;
 113                         }
 114                 } else {
 115                         err = -ENOTSUPP;
 116                 }
 117                 break;
 118         case PIN_CONFIG_SLEW_RATE:
 119                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret);
 120                 break;
 121         case PIN_CONFIG_INPUT_ENABLE:
 122         case PIN_CONFIG_OUTPUT_ENABLE:
 123                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 124                 if (err)
 125                         goto out;
 126                 /*     CONFIG     Current direction return value
 127                  * -------------  ----------------- ----------------------
 128                  * OUTPUT_ENABLE       output       1 (= HW value)
 129                  *                     input        0 (= HW value)
 130                  * INPUT_ENABLE        output       0 (= reverse HW value)
 131                  *                     input        1 (= reverse HW value)
 132                  */
 133                 if (param == PIN_CONFIG_INPUT_ENABLE)
 134                         ret = !ret;
 135
 136                 break;
 137         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 138                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 139                 if (err)
 140                         goto out;
 141                 /* return error when in output mode
 142                  * because schmitt trigger only work in input mode
 143                  */
 144                 if (ret) {
 145                         err = -EINVAL;
 146                         goto out;
 147                 }
 148
 149                 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret);
 150
 151                 break;
 152         case PIN_CONFIG_DRIVE_STRENGTH:
 153                 if (hw->soc->drive_get)
 154                         err = hw->soc->drive_get(hw, desc, &ret);
 155                 else
 156                         err = -ENOTSUPP;
 157                 break;
 158         case MTK_PIN_CONFIG_TDSEL:
 159         case MTK_PIN_CONFIG_RDSEL:
 160                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 161                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 162                 err = mtk_hw_get_value(hw, desc, reg, &ret);
 163                 break;
 164         case MTK_PIN_CONFIG_PU_ADV:
 165         case MTK_PIN_CONFIG_PD_ADV:
 166                 if (hw->soc->adv_pull_get) {
 167                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 168                         err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
 169                 } else
 170                         err = -ENOTSUPP;
 171                 break;
 172         case MTK_PIN_CONFIG_DRV_ADV:
 173                 if (hw->soc->adv_drive_get)
 174                         err = hw->soc->adv_drive_get(hw, desc, &ret);
 175                 else
 176                         err = -ENOTSUPP;
 177                 break;
 178         default:
 179                 err = -ENOTSUPP;
 180         }
 181
 182 out:
 183         if (!err)
 184                 *config = pinconf_to_config_packed(param, ret);
 185
 186         return err;
 187 }
 188
 189 static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 190                            enum pin_config_param param,
 191                            enum pin_config_param arg)
 192 {
 193         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 194         const struct mtk_pin_desc *desc;
 195         int err = 0;
 196         u32 reg;
 197
 198         if (pin >= hw->soc->npins) {
 199                 err = -EINVAL;
 200                 goto err;
 201         }
 202         desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
 203
 204         switch ((u32)param) {
 205         case PIN_CONFIG_BIAS_DISABLE:
 206                 if (hw->soc->bias_set_combo)
 207                         err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
 208                 else
 209                         err = -ENOTSUPP;
 210                 break;
 211         case PIN_CONFIG_BIAS_PULL_UP:
 212                 if (hw->soc->bias_set_combo)
 213                         err = hw->soc->bias_set_combo(hw, desc, 1, arg);
 214                 else
 215                         err = -ENOTSUPP;
 216                 break;
 217         case PIN_CONFIG_BIAS_PULL_DOWN:
 218                 if (hw->soc->bias_set_combo)
 219                         err = hw->soc->bias_set_combo(hw, desc, 0, arg);
 220                 else
 221                         err = -ENOTSUPP;
 222                 break;
 223         case PIN_CONFIG_OUTPUT_ENABLE:
 224                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
 225                                        MTK_DISABLE);
 226                 /* Keep set direction to consider the case that a GPIO pin
 227                  *  does not have SMT control
 228                  */
 229                 if (err != -ENOTSUPP)
 230                         goto err;
 231
 232                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 233                                        MTK_OUTPUT);
 234                 break;
 235         case PIN_CONFIG_INPUT_ENABLE:
 236                 /* regard all non-zero value as enable */
 237                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg);
 238                 if (err)
 239                         goto err;
 240
 241                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 242                                        MTK_INPUT);
 243                 break;
 244         case PIN_CONFIG_SLEW_RATE:
 245                 /* regard all non-zero value as enable */
 246                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg);
 247                 break;
 248         case PIN_CONFIG_OUTPUT:
 249                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
 250                                        MTK_OUTPUT);
 251                 if (err)
 252                         goto err;
 253
 254                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
 255                                        arg);
 256                 break;
 257         case PIN_CONFIG_INPUT_SCHMITT:
 258         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 259                 /* arg = 1: Input mode & SMT enable ;
 260                  * arg = 0: Output mode & SMT disable
 261                  */
 262                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg);
 263                 if (err)
 264                         goto err;
 265
 266                 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg);
 267                 break;
 268         case PIN_CONFIG_DRIVE_STRENGTH:
 269                 if (hw->soc->drive_set)
 270                         err = hw->soc->drive_set(hw, desc, arg);
 271                 else
 272                         err = -ENOTSUPP;
 273                 break;
 274         case MTK_PIN_CONFIG_TDSEL:
 275         case MTK_PIN_CONFIG_RDSEL:
 276                 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
 277                        PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
 278                 err = mtk_hw_set_value(hw, desc, reg, arg);
 279                 break;
 280         case MTK_PIN_CONFIG_PU_ADV:
 281         case MTK_PIN_CONFIG_PD_ADV:
 282                 if (hw->soc->adv_pull_set) {
 283                         bool pullup;
 284
 285                         pullup = param == MTK_PIN_CONFIG_PU_ADV;
 286                         err = hw->soc->adv_pull_set(hw, desc, pullup,
 287                                                     arg);
 288                 } else
 289                         err = -ENOTSUPP;
 290                 break;
 291         case MTK_PIN_CONFIG_DRV_ADV:
 292                 if (hw->soc->adv_drive_set)
 293                         err = hw->soc->adv_drive_set(hw, desc, arg);
 294                 else
 295                         err = -ENOTSUPP;
 296                 break;
 297         default:
 298                 err = -ENOTSUPP;
 299         }
 300
 301 err:
 302         return err;
 303 }
 304
 305 static struct mtk_pinctrl_group *
 306 mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin)
 307 {
 308         int i;
 309
 310         for (i = 0; i < hw->soc->ngrps; i++) {
 311                 struct mtk_pinctrl_group *grp = hw->groups + i;
 312
 313                 if (grp->pin == pin)
 314                         return grp;
 315         }
 316
 317         return NULL;
 318 }
 319
 320 static const struct mtk_func_desc *
 321 mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum)
 322 {
 323         const struct mtk_pin_desc *pin = hw->soc->pins + pin_num;
 324         const struct mtk_func_desc *func = pin->funcs;
 325
 326         while (func && func->name) {
 327                 if (func->muxval == fnum)
 328                         return func;
 329                 func++;
 330         }
 331
 332         return NULL;
 333 }
 334
 335 static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num,
 336                                         u32 fnum)
 337 {
 338         int i;
 339
 340         for (i = 0; i < hw->soc->npins; i++) {
 341                 const struct mtk_pin_desc *pin = hw->soc->pins + i;
 342
 343                 if (pin->number == pin_num) {
 344                         const struct mtk_func_desc *func = pin->funcs;
 345
 346                         while (func && func->name) {
 347                                 if (func->muxval == fnum)
 348                                         return true;
 349                                 func++;
 350                         }
 351
 352                         break;
 353                 }
 354         }
 355
 356         return false;
 357 }
 358
 359 static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
 360                                          u32 pin, u32 fnum,
 361                                          struct mtk_pinctrl_group *grp,
 362                                          struct pinctrl_map **map,
 363                                          unsigned *reserved_maps,
 364                                          unsigned *num_maps)
 365 {
 366         bool ret;
 367
 368         if (*num_maps == *reserved_maps)
 369                 return -ENOSPC;
 370
 371         (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
 372         (*map)[*num_maps].data.mux.group = grp->name;
 373
 374         ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
 375         if (!ret) {
 376                 dev_err(pctl->dev, "invalid function %d on pin %d .\n",
 377                         fnum, pin);
 378                 return -EINVAL;
 379         }
 380
 381         (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
 382         (*num_maps)++;
 383
 384         return 0;
 385 }
 386
 387 static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 388                                        struct device_node *node,
 389                                        struct pinctrl_map **map,
 390                                        unsigned *reserved_maps,
 391                                        unsigned *num_maps)
 392 {
 393         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 394         int num_pins, num_funcs, maps_per_pin, i, err;
 395         struct mtk_pinctrl_group *grp;
 396         unsigned int num_configs;
 397         bool has_config = false;
 398         unsigned long *configs;
 399         u32 pinfunc, pin, func;
 400         struct property *pins;
 401         unsigned reserve = 0;
 402
 403         pins = of_find_property(node, "pinmux", NULL);
 404         if (!pins) {
 405                 dev_err(hw->dev, "missing pins property in node %pOFn .\n",
 406                         node);
 407                 return -EINVAL;
 408         }
 409
 410         err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
 411                                               &num_configs);
 412         if (err)
 413                 return err;
 414
 415         if (num_configs)
 416                 has_config = true;
 417
 418         num_pins = pins->length / sizeof(u32);
 419         num_funcs = num_pins;
 420         maps_per_pin = 0;
 421         if (num_funcs)
 422                 maps_per_pin++;
 423         if (has_config && num_pins >= 1)
 424                 maps_per_pin++;
 425
 426         if (!num_pins || !maps_per_pin) {
 427                 err = -EINVAL;
 428                 goto exit;
 429         }
 430
 431         reserve = num_pins * maps_per_pin;
 432
 433         err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps,
 434                                         reserve);
 435         if (err < 0)
 436                 goto exit;
 437
 438         for (i = 0; i < num_pins; i++) {
 439                 err = of_property_read_u32_index(node, "pinmux", i, &pinfunc);
 440                 if (err)
 441                         goto exit;
 442
 443                 pin = MTK_GET_PIN_NO(pinfunc);
 444                 func = MTK_GET_PIN_FUNC(pinfunc);
 445
 446                 if (pin >= hw->soc->npins ||
 447                     func >= ARRAY_SIZE(mtk_gpio_functions)) {
 448                         dev_err(hw->dev, "invalid pins value.\n");
 449                         err = -EINVAL;
 450                         goto exit;
 451                 }
 452
 453                 grp = mtk_pctrl_find_group_by_pin(hw, pin);
 454                 if (!grp) {
 455                         dev_err(hw->dev, "unable to match pin %d to group\n",
 456                                 pin);
 457                         err = -EINVAL;
 458                         goto exit;
 459                 }
 460
 461                 err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map,
 462                                                     reserved_maps, num_maps);
 463                 if (err < 0)
 464                         goto exit;
 465
 466                 if (has_config) {
 467                         err = pinctrl_utils_add_map_configs(pctldev, map,
 468                                                             reserved_maps,
 469                                                             num_maps,
 470                                                             grp->name,
 471                                                             configs,
 472                                                             num_configs,
 473                                                             PIN_MAP_TYPE_CONFIGS_GROUP);
 474                         if (err < 0)
 475                                 goto exit;
 476                 }
 477         }
 478
 479         err = 0;
 480
 481 exit:
 482         kfree(configs);
 483         return err;
 484 }
 485
 486 static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 487                                     struct device_node *np_config,
 488                                     struct pinctrl_map **map,
 489                                     unsigned *num_maps)
 490 {
 491         struct device_node *np;
 492         unsigned reserved_maps;
 493         int ret;
 494
 495         *map = NULL;
 496         *num_maps = 0;
 497         reserved_maps = 0;
 498
 499         for_each_child_of_node(np_config, np) {
 500                 ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
 501                                                   &reserved_maps,
 502                                                   num_maps);
 503                 if (ret < 0) {
 504                         pinctrl_utils_free_map(pctldev, *map, *num_maps);
 505                         of_node_put(np);
 506                         return ret;
 507                 }
 508         }
 509
 510         return 0;
 511 }
 512
 513 static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
 514 {
 515         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 516
 517         return hw->soc->ngrps;
 518 }
 519
 520 static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
 521                                             unsigned group)
 522 {
 523         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 524
 525         return hw->groups[group].name;
 526 }
 527
 528 static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
 529                                     unsigned group, const unsigned **pins,
 530                                     unsigned *num_pins)
 531 {
 532         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 533
 534         *pins = (unsigned *)&hw->groups[group].pin;
 535         *num_pins = 1;
 536
 537         return 0;
 538 }
 539
 540 static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field)
 541 {
 542         const struct mtk_pin_desc *desc;
 543         int value, err;
 544
 545         if (gpio >= hw->soc->npins)
 546                 return -EINVAL;
 547
 548         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 549
 550         err = mtk_hw_get_value(hw, desc, field, &value);
 551         if (err)
 552                 return err;
 553
 554         return value;
 555 }
 556
 557 #define mtk_pctrl_get_pinmux(hw, gpio)                  \
 558         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE)
 559
 560 #define mtk_pctrl_get_direction(hw, gpio)               \
 561         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR)
 562
 563 #define mtk_pctrl_get_out(hw, gpio)                     \
 564         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO)
 565
 566 #define mtk_pctrl_get_in(hw, gpio)                      \
 567         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI)
 568
 569 #define mtk_pctrl_get_smt(hw, gpio)                     \
 570         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT)
 571
 572 #define mtk_pctrl_get_ies(hw, gpio)                     \
 573         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES)
 574
 575 #define mtk_pctrl_get_driving(hw, gpio)                 \
 576         mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV)
 577
 578 ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
 579         unsigned int gpio, char *buf, unsigned int bufLen)
 580 {
 581         int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1;
 582         const struct mtk_pin_desc *desc;
 583
 584         if (gpio >= hw->soc->npins)
 585                 return -EINVAL;
 586
 587         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 588         pinmux = mtk_pctrl_get_pinmux(hw, gpio);
 589         if (pinmux >= hw->soc->nfuncs)
 590                 pinmux -= hw->soc->nfuncs;
 591
 592         mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen);
 593         if (pullen == MTK_PUPD_SET_R1R0_00) {
 594                 pullen = 0;
 595                 r1 = 0;
 596                 r0 = 0;
 597         } else if (pullen == MTK_PUPD_SET_R1R0_01) {
 598                 pullen = 1;
 599                 r1 = 0;
 600                 r0 = 1;
 601         } else if (pullen == MTK_PUPD_SET_R1R0_10) {
 602                 pullen = 1;
 603                 r1 = 1;
 604                 r0 = 0;
 605         } else if (pullen == MTK_PUPD_SET_R1R0_11) {
 606                 pullen = 1;
 607                 r1 = 1;
 608                 r0 = 1;
 609         } else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) {
 610                 pullen = 0;
 611         }
 612         len += scnprintf(buf + len, bufLen - len,
 613                         "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d",
 614                         gpio,
 615                         pinmux,
 616                         mtk_pctrl_get_direction(hw, gpio),
 617                         mtk_pctrl_get_out(hw, gpio),
 618                         mtk_pctrl_get_in(hw, gpio),
 619                         mtk_pctrl_get_driving(hw, gpio),
 620                         mtk_pctrl_get_smt(hw, gpio),
 621                         mtk_pctrl_get_ies(hw, gpio),
 622                         pullen,
 623                         pullup);
 624
 625         if (r1 != -1) {
 626                 len += scnprintf(buf + len, bufLen - len, " (%1d %1d)\n",
 627                         r1, r0);
 628         } else {
 629                 len += scnprintf(buf + len, bufLen - len, "\n");
 630         }
 631
 632         return len;
 633 }
 634
 635 #define PIN_DBG_BUF_SZ 96
 636 static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 637                           unsigned int gpio)
 638 {
 639         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 640         char buf[PIN_DBG_BUF_SZ];
 641
 642         (void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ);
 643
 644         seq_printf(s, "%s", buf);
 645 }
 646
 647 static const struct pinctrl_ops mtk_pctlops = {
 648         .dt_node_to_map         = mtk_pctrl_dt_node_to_map,
 649         .dt_free_map            = pinctrl_utils_free_map,
 650         .get_groups_count       = mtk_pctrl_get_groups_count,
 651         .get_group_name         = mtk_pctrl_get_group_name,
 652         .get_group_pins         = mtk_pctrl_get_group_pins,
 653         .pin_dbg_show           = mtk_pctrl_dbg_show,
 654 };
 655
 656 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
 657 {
 658         return ARRAY_SIZE(mtk_gpio_functions);
 659 }
 660
 661 static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
 662                                          unsigned selector)
 663 {
 664         return mtk_gpio_functions[selector];
 665 }
 666
 667 static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
 668                                    unsigned function,
 669                                    const char * const **groups,
 670                                    unsigned * const num_groups)
 671 {
 672         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 673
 674         *groups = hw->grp_names;
 675         *num_groups = hw->soc->ngrps;
 676
 677         return 0;
 678 }
 679
 680 static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
 681                            unsigned function,
 682                            unsigned group)
 683 {
 684         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 685         struct mtk_pinctrl_group *grp = hw->groups + group;
 686         const struct mtk_func_desc *desc_func;
 687         const struct mtk_pin_desc *desc;
 688         bool ret;
 689
 690         ret = mtk_pctrl_is_function_valid(hw, grp->pin, function);
 691         if (!ret) {
 692                 dev_err(hw->dev, "invalid function %d on group %d .\n",
 693                         function, group);
 694                 return -EINVAL;
 695         }
 696
 697         desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function);
 698         if (!desc_func)
 699                 return -EINVAL;
 700
 701         desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin];
 702         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval);
 703
 704         return 0;
 705 }
 706
 707 static const struct pinmux_ops mtk_pmxops = {
 708         .get_functions_count    = mtk_pmx_get_funcs_cnt,
 709         .get_function_name      = mtk_pmx_get_func_name,
 710         .get_function_groups    = mtk_pmx_get_func_groups,
 711         .set_mux                = mtk_pmx_set_mux,
 712         .gpio_set_direction     = mtk_pinmux_gpio_set_direction,
 713         .gpio_request_enable    = mtk_pinmux_gpio_request_enable,
 714 };
 715
 716 static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group,
 717                                unsigned long *config)
 718 {
 719         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 720
 721         *config = hw->groups[group].config;
 722
 723         return 0;
 724 }
 725
 726 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
 727                                unsigned long *configs, unsigned num_configs)
 728 {
 729         struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
 730         struct mtk_pinctrl_group *grp = &hw->groups[group];
 731         int i, ret;
 732
 733         for (i = 0; i < num_configs; i++) {
 734                 ret = mtk_pinconf_set(pctldev, grp->pin,
 735                                       pinconf_to_config_param(configs[i]),
 736                                       pinconf_to_config_argument(configs[i]));
 737                 if (ret < 0)
 738                         return ret;
 739
 740                 grp->config = configs[i];
 741         }
 742
 743         return 0;
 744 }
 745
 746 static const struct pinconf_ops mtk_confops = {
 747         .pin_config_get = mtk_pinconf_get,
 748         .pin_config_group_get   = mtk_pconf_group_get,
 749         .pin_config_group_set   = mtk_pconf_group_set,
 750         .is_generic = true,
 751 };
 752
 753 static struct pinctrl_desc mtk_desc = {
 754         .name = PINCTRL_PINCTRL_DEV,
 755         .pctlops = &mtk_pctlops,
 756         .pmxops = &mtk_pmxops,
 757         .confops = &mtk_confops,
 758         .owner = THIS_MODULE,
 759 };
 760
 761 static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
 762 {
 763         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 764         const struct mtk_pin_desc *desc;
 765         int value, err;
 766
 767         if (gpio >= hw->soc->npins)
 768                 return -EINVAL;
 769
 770         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 771
 772         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);
 773         if (err)
 774                 return err;
 775
 776         if (value)
 777                 return GPIO_LINE_DIRECTION_OUT;
 778
 779         return GPIO_LINE_DIRECTION_IN;
 780 }
 781
 782 static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 783 {
 784         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 785         const struct mtk_pin_desc *desc;
 786         int value, err;
 787
 788         if (gpio >= hw->soc->npins)
 789                 return -EINVAL;
 790
 791         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 792
 793         err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
 794         if (err)
 795                 return err;
 796
 797         return !!value;
 798 }
 799
 800 static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 801 {
 802         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 803         const struct mtk_pin_desc *desc;
 804
 805         if (gpio >= hw->soc->npins)
 806                 return;
 807
 808         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 809
 810         mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
 811 }
 812
 813 static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
 814 {
 815         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 816
 817         if (gpio >= hw->soc->npins)
 818                 return -EINVAL;
 819
 820         return pinctrl_gpio_direction_input(chip->base + gpio);
 821 }
 822
 823 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
 824                                      int value)
 825 {
 826         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 827
 828         if (gpio >= hw->soc->npins)
 829                 return -EINVAL;
 830
 831         mtk_gpio_set(chip, gpio, value);
 832
 833         return pinctrl_gpio_direction_output(chip->base + gpio);
 834 }
 835
 836 static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
 837 {
 838         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 839         const struct mtk_pin_desc *desc;
 840
 841         if (!hw->eint)
 842                 return -ENOTSUPP;
 843
 844         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 845
 846         if (desc->eint.eint_n == EINT_NA)
 847                 return -ENOTSUPP;
 848
 849         return mtk_eint_find_irq(hw->eint, desc->eint.eint_n);
 850 }
 851
 852 static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
 853                                unsigned long config)
 854 {
 855         struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 856         const struct mtk_pin_desc *desc;
 857         u32 debounce;
 858
 859         desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
 860
 861         if (!hw->eint ||
 862             pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
 863             desc->eint.eint_n == EINT_NA)
 864                 return -ENOTSUPP;
 865
 866         debounce = pinconf_to_config_argument(config);
 867
 868         return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
 869 }
 870
 871 static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np)
 872 {
 873         struct gpio_chip *chip = &hw->chip;
 874         int ret;
 875
 876         chip->label             = PINCTRL_PINCTRL_DEV;
 877         chip->parent            = hw->dev;
 878         chip->request           = gpiochip_generic_request;
 879         chip->free              = gpiochip_generic_free;
 880         chip->get_direction     = mtk_gpio_get_direction;
 881         chip->direction_input   = mtk_gpio_direction_input;
 882         chip->direction_output  = mtk_gpio_direction_output;
 883         chip->get               = mtk_gpio_get;
 884         chip->set               = mtk_gpio_set;
 885         chip->to_irq            = mtk_gpio_to_irq,
 886         chip->set_config        = mtk_gpio_set_config,
 887         chip->base              = -1;
 888         chip->ngpio             = hw->soc->npins;
 889         chip->of_node           = np;
 890         chip->of_gpio_n_cells   = 2;
 891
 892         ret = gpiochip_add_data(chip, hw);
 893         if (ret < 0)
 894                 return ret;
 895
 896         return 0;
 897 }
 898
 899 static int mtk_pctrl_build_state(struct platform_device *pdev)
 900 {
 901         struct mtk_pinctrl *hw = platform_get_drvdata(pdev);
 902         int i;
 903
 904         /* Allocate groups */
 905         hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
 906                                         sizeof(*hw->groups), GFP_KERNEL);
 907         if (!hw->groups)
 908                 return -ENOMEM;
 909
 910         /* We assume that one pin is one group, use pin name as group name. */
 911         hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
 912                                            sizeof(*hw->grp_names), GFP_KERNEL);
 913         if (!hw->grp_names)
 914                 return -ENOMEM;
 915
 916         for (i = 0; i < hw->soc->npins; i++) {
 917                 const struct mtk_pin_desc *pin = hw->soc->pins + i;
 918                 struct mtk_pinctrl_group *group = hw->groups + i;
 919
 920                 group->name = pin->name;
 921                 group->pin = pin->number;
 922
 923                 hw->grp_names[i] = pin->name;
 924         }
 925
 926         return 0;
 927 }
 928
 929 int mtk_paris_pinctrl_probe(struct platform_device *pdev,
 930                             const struct mtk_pin_soc *soc)
 931 {
 932         struct pinctrl_pin_desc *pins;
 933         struct mtk_pinctrl *hw;
 934         struct resource *res;
 935         int err, i;
 936
 937         hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
 938         if (!hw)
 939                 return -ENOMEM;
 940
 941         platform_set_drvdata(pdev, hw);
 942         hw->soc = soc;
 943         hw->dev = &pdev->dev;
 944
 945         if (!hw->soc->nbase_names) {
 946                 dev_err(&pdev->dev,
 947                         "SoC should be assigned at least one register base\n");
 948                 return -EINVAL;
 949         }
 950
 951         hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names,
 952                                       sizeof(*hw->base), GFP_KERNEL);
 953         if (!hw->base)
 954                 return -ENOMEM;
 955
 956         for (i = 0; i < hw->soc->nbase_names; i++) {
 957                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 958                                                    hw->soc->base_names[i]);
 959                 if (!res) {
 960                         dev_err(&pdev->dev, "missing IO resource\n");
 961                         return -ENXIO;
 962                 }
 963
 964                 hw->base[i] = devm_ioremap_resource(&pdev->dev, res);
 965                 if (IS_ERR(hw->base[i]))
 966                         return PTR_ERR(hw->base[i]);
 967         }
 968
 969         hw->nbase = hw->soc->nbase_names;
 970
 971         err = mtk_pctrl_build_state(pdev);
 972         if (err) {
 973                 dev_err(&pdev->dev, "build state failed: %d\n", err);
 974                 return -EINVAL;
 975         }
 976
 977         /* Copy from internal struct mtk_pin_desc to register to the core */
 978         pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins),
 979                                   GFP_KERNEL);
 980         if (!pins)
 981                 return -ENOMEM;
 982
 983         for (i = 0; i < hw->soc->npins; i++) {
 984                 pins[i].number = hw->soc->pins[i].number;
 985                 pins[i].name = hw->soc->pins[i].name;
 986         }
 987
 988         /* Setup pins descriptions per SoC types */
 989         mtk_desc.pins = (const struct pinctrl_pin_desc *)pins;
 990         mtk_desc.npins = hw->soc->npins;
 991         mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings);
 992         mtk_desc.custom_params = mtk_custom_bindings;
 993 #ifdef CONFIG_DEBUG_FS
 994         mtk_desc.custom_conf_items = mtk_conf_items;
 995 #endif
 996
 997         err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
 998                                              &hw->pctrl);
 999         if (err)
1000                 return err;
1001
1002         err = pinctrl_enable(hw->pctrl);
1003         if (err)
1004                 return err;
1005
1006         err = mtk_build_eint(hw, pdev);
1007         if (err)
1008                 dev_warn(&pdev->dev,
1009                          "Failed to add EINT, but pinctrl still can work\n");
1010
1011         /* Build gpiochip should be after pinctrl_enable is done */
1012         err = mtk_build_gpiochip(hw, pdev->dev.of_node);
1013         if (err) {
1014                 dev_err(&pdev->dev, "Failed to add gpio_chip\n");
1015                 return err;
1016         }
1017
1018         platform_set_drvdata(pdev, hw);
1019
1020         return 0;
1021 }
1022
1023 static int mtk_paris_pinctrl_suspend(struct device *device)
1024 {
1025         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1026
1027         return mtk_eint_do_suspend(pctl->eint);
1028 }
1029
1030 static int mtk_paris_pinctrl_resume(struct device *device)
1031 {
1032         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
1033
1034         return mtk_eint_do_resume(pctl->eint);
1035 }
1036
1037 const struct dev_pm_ops mtk_paris_pinctrl_pm_ops = {
1038         .suspend_noirq = mtk_paris_pinctrl_suspend,
1039         .resume_noirq = mtk_paris_pinctrl_resume,
1040 };