drivers/pinctrl/uniphier/pinctrl-uniphier-core.c

   1 /*
   2  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/export.h>
  16 #include <linux/mfd/syscon.h>
  17 #include <linux/pinctrl/pinconf.h>
  18 #include <linux/pinctrl/pinconf-generic.h>
  19 #include <linux/pinctrl/pinctrl.h>
  20 #include <linux/pinctrl/pinmux.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regmap.h>
  23
  24 #include "../core.h"
  25 #include "../pinctrl-utils.h"
  26 #include "pinctrl-uniphier.h"
  27
  28 struct uniphier_pinctrl_priv {
  29         struct pinctrl_dev *pctldev;
  30         struct regmap *regmap;
  31         struct uniphier_pinctrl_socdata *socdata;
  32 };
  33
  34 static int uniphier_pctl_get_groups_count(struct pinctrl_dev *pctldev)
  35 {
  36         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
  37
  38         return priv->socdata->groups_count;
  39 }
  40
  41 static const char *uniphier_pctl_get_group_name(struct pinctrl_dev *pctldev,
  42                                                 unsigned selector)
  43 {
  44         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
  45
  46         return priv->socdata->groups[selector].name;
  47 }
  48
  49 static int uniphier_pctl_get_group_pins(struct pinctrl_dev *pctldev,
  50                                         unsigned selector,
  51                                         const unsigned **pins,
  52                                         unsigned *num_pins)
  53 {
  54         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
  55
  56         *pins = priv->socdata->groups[selector].pins;
  57         *num_pins = priv->socdata->groups[selector].num_pins;
  58
  59         return 0;
  60 }
  61
  62 #ifdef CONFIG_DEBUG_FS
  63 static void uniphier_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
  64                                        struct seq_file *s, unsigned offset)
  65 {
  66         const struct pinctrl_pin_desc *pin = &pctldev->desc->pins[offset];
  67         const char *pull_dir, *drv_str;
  68
  69         switch (uniphier_pin_get_pull_dir(pin->drv_data)) {
  70         case UNIPHIER_PIN_PULL_UP:
  71                 pull_dir = "UP";
  72                 break;
  73         case UNIPHIER_PIN_PULL_DOWN:
  74                 pull_dir = "DOWN";
  75                 break;
  76         case UNIPHIER_PIN_PULL_NONE:
  77                 pull_dir = "NONE";
  78                 break;
  79         default:
  80                 BUG();
  81         }
  82
  83         switch (uniphier_pin_get_drv_str(pin->drv_data)) {
  84         case UNIPHIER_PIN_DRV_4_8:
  85                 drv_str = "4/8(mA)";
  86                 break;
  87         case UNIPHIER_PIN_DRV_8_12_16_20:
  88                 drv_str = "8/12/16/20(mA)";
  89                 break;
  90         case UNIPHIER_PIN_DRV_FIXED_4:
  91                 drv_str = "4(mA)";
  92                 break;
  93         case UNIPHIER_PIN_DRV_FIXED_5:
  94                 drv_str = "5(mA)";
  95                 break;
  96         case UNIPHIER_PIN_DRV_FIXED_8:
  97                 drv_str = "8(mA)";
  98                 break;
  99         case UNIPHIER_PIN_DRV_NONE:
 100                 drv_str = "NONE";
 101                 break;
 102         default:
 103                 BUG();
 104         }
 105
 106         seq_printf(s, " PULL_DIR=%s  DRV_STR=%s", pull_dir, drv_str);
 107 }
 108 #endif
 109
 110 static const struct pinctrl_ops uniphier_pctlops = {
 111         .get_groups_count = uniphier_pctl_get_groups_count,
 112         .get_group_name = uniphier_pctl_get_group_name,
 113         .get_group_pins = uniphier_pctl_get_group_pins,
 114 #ifdef CONFIG_DEBUG_FS
 115         .pin_dbg_show = uniphier_pctl_pin_dbg_show,
 116 #endif
 117         .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
 118         .dt_free_map = pinctrl_utils_free_map,
 119 };
 120
 121 static int uniphier_conf_pin_bias_get(struct pinctrl_dev *pctldev,
 122                                       const struct pinctrl_pin_desc *pin,
 123                                       enum pin_config_param param)
 124 {
 125         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 126         enum uniphier_pin_pull_dir pull_dir =
 127                                 uniphier_pin_get_pull_dir(pin->drv_data);
 128         unsigned int pupdctrl, reg, shift, val;
 129         unsigned int expected = 1;
 130         int ret;
 131
 132         switch (param) {
 133         case PIN_CONFIG_BIAS_DISABLE:
 134                 if (pull_dir == UNIPHIER_PIN_PULL_NONE)
 135                         return 0;
 136                 if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED ||
 137                     pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED)
 138                         return -EINVAL;
 139                 expected = 0;
 140                 break;
 141         case PIN_CONFIG_BIAS_PULL_UP:
 142                 if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED)
 143                         return 0;
 144                 if (pull_dir != UNIPHIER_PIN_PULL_UP)
 145                         return -EINVAL;
 146                 break;
 147         case PIN_CONFIG_BIAS_PULL_DOWN:
 148                 if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED)
 149                         return 0;
 150                 if (pull_dir != UNIPHIER_PIN_PULL_DOWN)
 151                         return -EINVAL;
 152                 break;
 153         default:
 154                 BUG();
 155         }
 156
 157         pupdctrl = uniphier_pin_get_pupdctrl(pin->drv_data);
 158
 159         reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
 160         shift = pupdctrl % 32;
 161
 162         ret = regmap_read(priv->regmap, reg, &val);
 163         if (ret)
 164                 return ret;
 165
 166         val = (val >> shift) & 1;
 167
 168         return (val == expected) ? 0 : -EINVAL;
 169 }
 170
 171 static int uniphier_conf_pin_drive_get(struct pinctrl_dev *pctldev,
 172                                        const struct pinctrl_pin_desc *pin,
 173                                        u16 *strength)
 174 {
 175         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 176         enum uniphier_pin_drv_str drv_str =
 177                                 uniphier_pin_get_drv_str(pin->drv_data);
 178         const unsigned int strength_4_8[] = {4, 8};
 179         const unsigned int strength_8_12_16_20[] = {8, 12, 16, 20};
 180         const unsigned int *supported_strength;
 181         unsigned int drvctrl, reg, shift, mask, width, val;
 182         int ret;
 183
 184         switch (drv_str) {
 185         case UNIPHIER_PIN_DRV_4_8:
 186                 supported_strength = strength_4_8;
 187                 width = 1;
 188                 break;
 189         case UNIPHIER_PIN_DRV_8_12_16_20:
 190                 supported_strength = strength_8_12_16_20;
 191                 width = 2;
 192                 break;
 193         case UNIPHIER_PIN_DRV_FIXED_4:
 194                 *strength = 4;
 195                 return 0;
 196         case UNIPHIER_PIN_DRV_FIXED_5:
 197                 *strength = 5;
 198                 return 0;
 199         case UNIPHIER_PIN_DRV_FIXED_8:
 200                 *strength = 8;
 201                 return 0;
 202         default:
 203                 /* drive strength control is not supported for this pin */
 204                 return -EINVAL;
 205         }
 206
 207         drvctrl = uniphier_pin_get_drvctrl(pin->drv_data);
 208         drvctrl *= width;
 209
 210         reg = (width == 2) ? UNIPHIER_PINCTRL_DRV2CTRL_BASE :
 211                              UNIPHIER_PINCTRL_DRVCTRL_BASE;
 212
 213         reg += drvctrl / 32 * 4;
 214         shift = drvctrl % 32;
 215         mask = (1U << width) - 1;
 216
 217         ret = regmap_read(priv->regmap, reg, &val);
 218         if (ret)
 219                 return ret;
 220
 221         *strength = supported_strength[(val >> shift) & mask];
 222
 223         return 0;
 224 }
 225
 226 static int uniphier_conf_pin_input_enable_get(struct pinctrl_dev *pctldev,
 227                                         const struct pinctrl_pin_desc *pin)
 228 {
 229         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 230         unsigned int iectrl = uniphier_pin_get_iectrl(pin->drv_data);
 231         unsigned int val;
 232         int ret;
 233
 234         if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
 235                 /* This pin is always input-enabled. */
 236                 return 0;
 237
 238         ret = regmap_read(priv->regmap, UNIPHIER_PINCTRL_IECTRL, &val);
 239         if (ret)
 240                 return ret;
 241
 242         return val & BIT(iectrl) ? 0 : -EINVAL;
 243 }
 244
 245 static int uniphier_conf_pin_config_get(struct pinctrl_dev *pctldev,
 246                                         unsigned pin,
 247                                         unsigned long *configs)
 248 {
 249         const struct pinctrl_pin_desc *pin_desc = &pctldev->desc->pins[pin];
 250         enum pin_config_param param = pinconf_to_config_param(*configs);
 251         bool has_arg = false;
 252         u16 arg;
 253         int ret;
 254
 255         switch (param) {
 256         case PIN_CONFIG_BIAS_DISABLE:
 257         case PIN_CONFIG_BIAS_PULL_UP:
 258         case PIN_CONFIG_BIAS_PULL_DOWN:
 259                 ret = uniphier_conf_pin_bias_get(pctldev, pin_desc, param);
 260                 break;
 261         case PIN_CONFIG_DRIVE_STRENGTH:
 262                 ret = uniphier_conf_pin_drive_get(pctldev, pin_desc, &arg);
 263                 has_arg = true;
 264                 break;
 265         case PIN_CONFIG_INPUT_ENABLE:
 266                 ret = uniphier_conf_pin_input_enable_get(pctldev, pin_desc);
 267                 break;
 268         default:
 269                 /* unsupported parameter */
 270                 ret = -EINVAL;
 271                 break;
 272         }
 273
 274         if (ret == 0 && has_arg)
 275                 *configs = pinconf_to_config_packed(param, arg);
 276
 277         return ret;
 278 }
 279
 280 static int uniphier_conf_pin_bias_set(struct pinctrl_dev *pctldev,
 281                                       const struct pinctrl_pin_desc *pin,
 282                                       enum pin_config_param param,
 283                                       u16 arg)
 284 {
 285         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 286         enum uniphier_pin_pull_dir pull_dir =
 287                                 uniphier_pin_get_pull_dir(pin->drv_data);
 288         unsigned int pupdctrl, reg, shift;
 289         unsigned int val = 1;
 290
 291         switch (param) {
 292         case PIN_CONFIG_BIAS_DISABLE:
 293                 if (pull_dir == UNIPHIER_PIN_PULL_NONE)
 294                         return 0;
 295                 if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED ||
 296                     pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED) {
 297                         dev_err(pctldev->dev,
 298                                 "can not disable pull register for pin %u (%s)\n",
 299                                 pin->number, pin->name);
 300                         return -EINVAL;
 301                 }
 302                 val = 0;
 303                 break;
 304         case PIN_CONFIG_BIAS_PULL_UP:
 305                 if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED && arg != 0)
 306                         return 0;
 307                 if (pull_dir != UNIPHIER_PIN_PULL_UP) {
 308                         dev_err(pctldev->dev,
 309                                 "pull-up is unsupported for pin %u (%s)\n",
 310                                 pin->number, pin->name);
 311                         return -EINVAL;
 312                 }
 313                 if (arg == 0) {
 314                         dev_err(pctldev->dev, "pull-up can not be total\n");
 315                         return -EINVAL;
 316                 }
 317                 break;
 318         case PIN_CONFIG_BIAS_PULL_DOWN:
 319                 if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED && arg != 0)
 320                         return 0;
 321                 if (pull_dir != UNIPHIER_PIN_PULL_DOWN) {
 322                         dev_err(pctldev->dev,
 323                                 "pull-down is unsupported for pin %u (%s)\n",
 324                                 pin->number, pin->name);
 325                         return -EINVAL;
 326                 }
 327                 if (arg == 0) {
 328                         dev_err(pctldev->dev, "pull-down can not be total\n");
 329                         return -EINVAL;
 330                 }
 331                 break;
 332         case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
 333                 if (pull_dir == UNIPHIER_PIN_PULL_NONE) {
 334                         dev_err(pctldev->dev,
 335                                 "pull-up/down is unsupported for pin %u (%s)\n",
 336                                 pin->number, pin->name);
 337                         return -EINVAL;
 338                 }
 339
 340                 if (arg == 0)
 341                         return 0; /* configuration ingored */
 342                 break;
 343         default:
 344                 BUG();
 345         }
 346
 347         pupdctrl = uniphier_pin_get_pupdctrl(pin->drv_data);
 348
 349         reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
 350         shift = pupdctrl % 32;
 351
 352         return regmap_update_bits(priv->regmap, reg, 1 << shift, val << shift);
 353 }
 354
 355 static int uniphier_conf_pin_drive_set(struct pinctrl_dev *pctldev,
 356                                        const struct pinctrl_pin_desc *pin,
 357                                        u16 strength)
 358 {
 359         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 360         enum uniphier_pin_drv_str drv_str =
 361                                 uniphier_pin_get_drv_str(pin->drv_data);
 362         const unsigned int strength_4_8[] = {4, 8, -1};
 363         const unsigned int strength_8_12_16_20[] = {8, 12, 16, 20, -1};
 364         const unsigned int *supported_strength;
 365         unsigned int drvctrl, reg, shift, mask, width, val;
 366
 367         switch (drv_str) {
 368         case UNIPHIER_PIN_DRV_4_8:
 369                 supported_strength = strength_4_8;
 370                 width = 1;
 371                 break;
 372         case UNIPHIER_PIN_DRV_8_12_16_20:
 373                 supported_strength = strength_8_12_16_20;
 374                 width = 2;
 375                 break;
 376         default:
 377                 dev_err(pctldev->dev,
 378                         "cannot change drive strength for pin %u (%s)\n",
 379                         pin->number, pin->name);
 380                 return -EINVAL;
 381         }
 382
 383         for (val = 0; supported_strength[val] > 0; val++) {
 384                 if (supported_strength[val] > strength)
 385                         break;
 386         }
 387
 388         if (val == 0) {
 389                 dev_err(pctldev->dev,
 390                         "unsupported drive strength %u mA for pin %u (%s)\n",
 391                         strength, pin->number, pin->name);
 392                 return -EINVAL;
 393         }
 394
 395         val--;
 396
 397         drvctrl = uniphier_pin_get_drvctrl(pin->drv_data);
 398         drvctrl *= width;
 399
 400         reg = (width == 2) ? UNIPHIER_PINCTRL_DRV2CTRL_BASE :
 401                              UNIPHIER_PINCTRL_DRVCTRL_BASE;
 402
 403         reg += drvctrl / 32 * 4;
 404         shift = drvctrl % 32;
 405         mask = (1U << width) - 1;
 406
 407         return regmap_update_bits(priv->regmap, reg,
 408                                   mask << shift, val << shift);
 409 }
 410
 411 static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev,
 412                                           const struct pinctrl_pin_desc *pin,
 413                                           u16 enable)
 414 {
 415         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 416         unsigned int iectrl = uniphier_pin_get_iectrl(pin->drv_data);
 417
 418         if (enable == 0) {
 419                 /*
 420                  * Multiple pins share one input enable, so per-pin disabling
 421                  * is impossible.
 422                  */
 423                 dev_err(pctldev->dev, "unable to disable input\n");
 424                 return -EINVAL;
 425         }
 426
 427         if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
 428                 /* This pin is always input-enabled. nothing to do. */
 429                 return 0;
 430
 431         return regmap_update_bits(priv->regmap, UNIPHIER_PINCTRL_IECTRL,
 432                                   BIT(iectrl), BIT(iectrl));
 433 }
 434
 435 static int uniphier_conf_pin_config_set(struct pinctrl_dev *pctldev,
 436                                         unsigned pin,
 437                                         unsigned long *configs,
 438                                         unsigned num_configs)
 439 {
 440         const struct pinctrl_pin_desc *pin_desc = &pctldev->desc->pins[pin];
 441         int i, ret;
 442
 443         for (i = 0; i < num_configs; i++) {
 444                 enum pin_config_param param =
 445                                         pinconf_to_config_param(configs[i]);
 446                 u16 arg = pinconf_to_config_argument(configs[i]);
 447
 448                 switch (param) {
 449                 case PIN_CONFIG_BIAS_DISABLE:
 450                 case PIN_CONFIG_BIAS_PULL_UP:
 451                 case PIN_CONFIG_BIAS_PULL_DOWN:
 452                 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
 453                         ret = uniphier_conf_pin_bias_set(pctldev, pin_desc,
 454                                                          param, arg);
 455                         break;
 456                 case PIN_CONFIG_DRIVE_STRENGTH:
 457                         ret = uniphier_conf_pin_drive_set(pctldev, pin_desc,
 458                                                           arg);
 459                         break;
 460                 case PIN_CONFIG_INPUT_ENABLE:
 461                         ret = uniphier_conf_pin_input_enable(pctldev,
 462                                                              pin_desc, arg);
 463                         break;
 464                 default:
 465                         dev_err(pctldev->dev,
 466                                 "unsupported configuration parameter %u\n",
 467                                 param);
 468                         return -EINVAL;
 469                 }
 470
 471                 if (ret)
 472                         return ret;
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int uniphier_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
 479                                               unsigned selector,
 480                                               unsigned long *configs,
 481                                               unsigned num_configs)
 482 {
 483         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 484         const unsigned *pins = priv->socdata->groups[selector].pins;
 485         unsigned num_pins = priv->socdata->groups[selector].num_pins;
 486         int i, ret;
 487
 488         for (i = 0; i < num_pins; i++) {
 489                 ret = uniphier_conf_pin_config_set(pctldev, pins[i],
 490                                                    configs, num_configs);
 491                 if (ret)
 492                         return ret;
 493         }
 494
 495         return 0;
 496 }
 497
 498 static const struct pinconf_ops uniphier_confops = {
 499         .is_generic = true,
 500         .pin_config_get = uniphier_conf_pin_config_get,
 501         .pin_config_set = uniphier_conf_pin_config_set,
 502         .pin_config_group_set = uniphier_conf_pin_config_group_set,
 503 };
 504
 505 static int uniphier_pmx_get_functions_count(struct pinctrl_dev *pctldev)
 506 {
 507         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 508
 509         return priv->socdata->functions_count;
 510 }
 511
 512 static const char *uniphier_pmx_get_function_name(struct pinctrl_dev *pctldev,
 513                                                   unsigned selector)
 514 {
 515         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 516
 517         return priv->socdata->functions[selector].name;
 518 }
 519
 520 static int uniphier_pmx_get_function_groups(struct pinctrl_dev *pctldev,
 521                                             unsigned selector,
 522                                             const char * const **groups,
 523                                             unsigned *num_groups)
 524 {
 525         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 526
 527         *groups = priv->socdata->functions[selector].groups;
 528         *num_groups = priv->socdata->functions[selector].num_groups;
 529
 530         return 0;
 531 }
 532
 533 static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
 534                                     unsigned muxval)
 535 {
 536         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 537         unsigned mux_bits = priv->socdata->mux_bits;
 538         unsigned reg_stride = priv->socdata->reg_stride;
 539         unsigned reg, reg_end, shift, mask;
 540         int ret;
 541
 542         /* some pins need input-enabling */
 543         ret = uniphier_conf_pin_input_enable(pctldev,
 544                                              &pctldev->desc->pins[pin], 1);
 545         if (ret)
 546                 return ret;
 547
 548         reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
 549         reg_end = reg + reg_stride;
 550         shift = pin * mux_bits % 32;
 551         mask = (1U << mux_bits) - 1;
 552
 553         /*
 554          * If reg_stride is greater than 4, the MSB of each pinsel shall be
 555          * stored in the offset+4.
 556          */
 557         for (; reg < reg_end; reg += 4) {
 558                 ret = regmap_update_bits(priv->regmap, reg,
 559                                          mask << shift, muxval << shift);
 560                 if (ret)
 561                         return ret;
 562                 muxval >>= mux_bits;
 563         }
 564
 565         if (priv->socdata->load_pinctrl) {
 566                 ret = regmap_write(priv->regmap,
 567                                    UNIPHIER_PINCTRL_LOAD_PINMUX, 1);
 568                 if (ret)
 569                         return ret;
 570         }
 571
 572         return 0;
 573 }
 574
 575 static int uniphier_pmx_set_mux(struct pinctrl_dev *pctldev,
 576                                 unsigned func_selector,
 577                                 unsigned group_selector)
 578 {
 579         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 580         const struct uniphier_pinctrl_group *grp =
 581                                         &priv->socdata->groups[group_selector];
 582         int i;
 583         int ret;
 584
 585         for (i = 0; i < grp->num_pins; i++) {
 586                 ret = uniphier_pmx_set_one_mux(pctldev, grp->pins[i],
 587                                                grp->muxvals[i]);
 588                 if (ret)
 589                         return ret;
 590         }
 591
 592         return 0;
 593 }
 594
 595 static int uniphier_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
 596                                             struct pinctrl_gpio_range *range,
 597                                             unsigned offset)
 598 {
 599         struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
 600         const struct uniphier_pinctrl_group *groups = priv->socdata->groups;
 601         int groups_count = priv->socdata->groups_count;
 602         enum uniphier_pinmux_gpio_range_type range_type;
 603         int i, j;
 604
 605         if (strstr(range->name, "irq"))
 606                 range_type = UNIPHIER_PINMUX_GPIO_RANGE_IRQ;
 607         else
 608                 range_type = UNIPHIER_PINMUX_GPIO_RANGE_PORT;
 609
 610         for (i = 0; i < groups_count; i++) {
 611                 if (groups[i].range_type != range_type)
 612                         continue;
 613
 614                 for (j = 0; j < groups[i].num_pins; j++)
 615                         if (groups[i].pins[j] == offset)
 616                                 goto found;
 617         }
 618
 619         dev_err(pctldev->dev, "pin %u does not support GPIO\n", offset);
 620         return -EINVAL;
 621
 622 found:
 623         return uniphier_pmx_set_one_mux(pctldev, offset, groups[i].muxvals[j]);
 624 }
 625
 626 static const struct pinmux_ops uniphier_pmxops = {
 627         .get_functions_count = uniphier_pmx_get_functions_count,
 628         .get_function_name = uniphier_pmx_get_function_name,
 629         .get_function_groups = uniphier_pmx_get_function_groups,
 630         .set_mux = uniphier_pmx_set_mux,
 631         .gpio_request_enable = uniphier_pmx_gpio_request_enable,
 632         .strict = true,
 633 };
 634
 635 int uniphier_pinctrl_probe(struct platform_device *pdev,
 636                            struct pinctrl_desc *desc,
 637                            struct uniphier_pinctrl_socdata *socdata)
 638 {
 639         struct device *dev = &pdev->dev;
 640         struct uniphier_pinctrl_priv *priv;
 641
 642         if (!socdata ||
 643             !socdata->groups ||
 644             !socdata->groups_count ||
 645             !socdata->functions ||
 646             !socdata->functions_count ||
 647             !socdata->mux_bits ||
 648             !socdata->reg_stride) {
 649                 dev_err(dev, "pinctrl socdata lacks necessary members\n");
 650                 return -EINVAL;
 651         }
 652
 653         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 654         if (!priv)
 655                 return -ENOMEM;
 656
 657         priv->regmap = syscon_node_to_regmap(dev->of_node);
 658         if (IS_ERR(priv->regmap)) {
 659                 dev_err(dev, "failed to get regmap\n");
 660                 return PTR_ERR(priv->regmap);
 661         }
 662
 663         priv->socdata = socdata;
 664         desc->pctlops = &uniphier_pctlops;
 665         desc->pmxops = &uniphier_pmxops;
 666         desc->confops = &uniphier_confops;
 667
 668         priv->pctldev = devm_pinctrl_register(dev, desc, priv);
 669         if (IS_ERR(priv->pctldev)) {
 670                 dev_err(dev, "failed to register UniPhier pinctrl driver\n");
 671                 return PTR_ERR(priv->pctldev);
 672         }
 673
 674         platform_set_drvdata(pdev, priv);
 675
 676         return 0;
 677 }
 678 EXPORT_SYMBOL_GPL(uniphier_pinctrl_probe);