drivers/pinctrl/pinctrl-tegra.c

   1 /*
   2  * Driver for the NVIDIA Tegra pinmux
   3  *
   4  * Copyright (c) 2011-2012, NVIDIA CORPORATION.  All rights reserved.
   5  *
   6  * Derived from code:
   7  * Copyright (C) 2010 Google, Inc.
   8  * Copyright (C) 2010 NVIDIA Corporation
   9  * Copyright (C) 2009-2011 ST-Ericsson AB
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms and conditions of the GNU General Public License,
  13  * version 2, as published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  * more details.
  19  */
  20
  21 #include <linux/err.h>
  22 #include <linux/init.h>
  23 #include <linux/io.h>
  24 #include <linux/module.h>
  25 #include <linux/of.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pinctrl/machine.h>
  28 #include <linux/pinctrl/pinctrl.h>
  29 #include <linux/pinctrl/pinmux.h>
  30 #include <linux/pinctrl/pinconf.h>
  31 #include <linux/slab.h>
  32
  33 #include "core.h"
  34 #include "pinctrl-tegra.h"
  35
  36 struct tegra_pmx {
  37         struct device *dev;
  38         struct pinctrl_dev *pctl;
  39
  40         const struct tegra_pinctrl_soc_data *soc;
  41
  42         int nbanks;
  43         void __iomem **regs;
  44 };
  45
  46 static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg)
  47 {
  48         return readl(pmx->regs[bank] + reg);
  49 }
  50
  51 static inline void pmx_writel(struct tegra_pmx *pmx, u32 val, u32 bank, u32 reg)
  52 {
  53         writel(val, pmx->regs[bank] + reg);
  54 }
  55
  56 static int tegra_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
  57 {
  58         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
  59
  60         return pmx->soc->ngroups;
  61 }
  62
  63 static const char *tegra_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
  64                                                 unsigned group)
  65 {
  66         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
  67
  68         return pmx->soc->groups[group].name;
  69 }
  70
  71 static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
  72                                         unsigned group,
  73                                         const unsigned **pins,
  74                                         unsigned *num_pins)
  75 {
  76         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
  77
  78         *pins = pmx->soc->groups[group].pins;
  79         *num_pins = pmx->soc->groups[group].npins;
  80
  81         return 0;
  82 }
  83
  84 #ifdef CONFIG_DEBUG_FS
  85 static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
  86                                        struct seq_file *s,
  87                                        unsigned offset)
  88 {
  89         seq_printf(s, " %s", dev_name(pctldev->dev));
  90 }
  91 #endif
  92
  93 static int reserve_map(struct device *dev, struct pinctrl_map **map,
  94                        unsigned *reserved_maps, unsigned *num_maps,
  95                        unsigned reserve)
  96 {
  97         unsigned old_num = *reserved_maps;
  98         unsigned new_num = *num_maps + reserve;
  99         struct pinctrl_map *new_map;
 100
 101         if (old_num >= new_num)
 102                 return 0;
 103
 104         new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
 105         if (!new_map) {
 106                 dev_err(dev, "krealloc(map) failed\n");
 107                 return -ENOMEM;
 108         }
 109
 110         memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
 111
 112         *map = new_map;
 113         *reserved_maps = new_num;
 114
 115         return 0;
 116 }
 117
 118 static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
 119                        unsigned *num_maps, const char *group,
 120                        const char *function)
 121 {
 122         if (WARN_ON(*num_maps == *reserved_maps))
 123                 return -ENOSPC;
 124
 125         (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
 126         (*map)[*num_maps].data.mux.group = group;
 127         (*map)[*num_maps].data.mux.function = function;
 128         (*num_maps)++;
 129
 130         return 0;
 131 }
 132
 133 static int add_map_configs(struct device *dev, struct pinctrl_map **map,
 134                            unsigned *reserved_maps, unsigned *num_maps,
 135                            const char *group, unsigned long *configs,
 136                            unsigned num_configs)
 137 {
 138         unsigned long *dup_configs;
 139
 140         if (WARN_ON(*num_maps == *reserved_maps))
 141                 return -ENOSPC;
 142
 143         dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
 144                               GFP_KERNEL);
 145         if (!dup_configs) {
 146                 dev_err(dev, "kmemdup(configs) failed\n");
 147                 return -ENOMEM;
 148         }
 149
 150         (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
 151         (*map)[*num_maps].data.configs.group_or_pin = group;
 152         (*map)[*num_maps].data.configs.configs = dup_configs;
 153         (*map)[*num_maps].data.configs.num_configs = num_configs;
 154         (*num_maps)++;
 155
 156         return 0;
 157 }
 158
 159 static int add_config(struct device *dev, unsigned long **configs,
 160                       unsigned *num_configs, unsigned long config)
 161 {
 162         unsigned old_num = *num_configs;
 163         unsigned new_num = old_num + 1;
 164         unsigned long *new_configs;
 165
 166         new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
 167                                GFP_KERNEL);
 168         if (!new_configs) {
 169                 dev_err(dev, "krealloc(configs) failed\n");
 170                 return -ENOMEM;
 171         }
 172
 173         new_configs[old_num] = config;
 174
 175         *configs = new_configs;
 176         *num_configs = new_num;
 177
 178         return 0;
 179 }
 180
 181 static void tegra_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
 182                                       struct pinctrl_map *map,
 183                                       unsigned num_maps)
 184 {
 185         int i;
 186
 187         for (i = 0; i < num_maps; i++)
 188                 if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
 189                         kfree(map[i].data.configs.configs);
 190
 191         kfree(map);
 192 }
 193
 194 static const struct cfg_param {
 195         const char *property;
 196         enum tegra_pinconf_param param;
 197 } cfg_params[] = {
 198         {"nvidia,pull",                 TEGRA_PINCONF_PARAM_PULL},
 199         {"nvidia,tristate",             TEGRA_PINCONF_PARAM_TRISTATE},
 200         {"nvidia,enable-input",         TEGRA_PINCONF_PARAM_ENABLE_INPUT},
 201         {"nvidia,open-drain",           TEGRA_PINCONF_PARAM_OPEN_DRAIN},
 202         {"nvidia,lock",                 TEGRA_PINCONF_PARAM_LOCK},
 203         {"nvidia,io-reset",             TEGRA_PINCONF_PARAM_IORESET},
 204         {"nvidia,high-speed-mode",      TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE},
 205         {"nvidia,schmitt",              TEGRA_PINCONF_PARAM_SCHMITT},
 206         {"nvidia,low-power-mode",       TEGRA_PINCONF_PARAM_LOW_POWER_MODE},
 207         {"nvidia,pull-down-strength",   TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH},
 208         {"nvidia,pull-up-strength",     TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH},
 209         {"nvidia,slew-rate-falling",    TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
 210         {"nvidia,slew-rate-rising",     TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
 211 };
 212
 213 static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
 214                                            struct device_node *np,
 215                                            struct pinctrl_map **map,
 216                                            unsigned *reserved_maps,
 217                                            unsigned *num_maps)
 218 {
 219         int ret, i;
 220         const char *function;
 221         u32 val;
 222         unsigned long config;
 223         unsigned long *configs = NULL;
 224         unsigned num_configs = 0;
 225         unsigned reserve;
 226         struct property *prop;
 227         const char *group;
 228
 229         ret = of_property_read_string(np, "nvidia,function", &function);
 230         if (ret < 0) {
 231                 /* EINVAL=missing, which is fine since it's optional */
 232                 if (ret != -EINVAL)
 233                         dev_err(dev,
 234                                 "could not parse property nvidia,function\n");
 235                 function = NULL;
 236         }
 237
 238         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
 239                 ret = of_property_read_u32(np, cfg_params[i].property, &val);
 240                 if (!ret) {
 241                         config = TEGRA_PINCONF_PACK(cfg_params[i].param, val);
 242                         ret = add_config(dev, &configs, &num_configs, config);
 243                         if (ret < 0)
 244                                 goto exit;
 245                 /* EINVAL=missing, which is fine since it's optional */
 246                 } else if (ret != -EINVAL) {
 247                         dev_err(dev, "could not parse property %s\n",
 248                                 cfg_params[i].property);
 249                 }
 250         }
 251
 252         reserve = 0;
 253         if (function != NULL)
 254                 reserve++;
 255         if (num_configs)
 256                 reserve++;
 257         ret = of_property_count_strings(np, "nvidia,pins");
 258         if (ret < 0) {
 259                 dev_err(dev, "could not parse property nvidia,pins\n");
 260                 goto exit;
 261         }
 262         reserve *= ret;
 263
 264         ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
 265         if (ret < 0)
 266                 goto exit;
 267
 268         of_property_for_each_string(np, "nvidia,pins", prop, group) {
 269                 if (function) {
 270                         ret = add_map_mux(map, reserved_maps, num_maps,
 271                                           group, function);
 272                         if (ret < 0)
 273                                 goto exit;
 274                 }
 275
 276                 if (num_configs) {
 277                         ret = add_map_configs(dev, map, reserved_maps,
 278                                               num_maps, group, configs,
 279                                               num_configs);
 280                         if (ret < 0)
 281                                 goto exit;
 282                 }
 283         }
 284
 285         ret = 0;
 286
 287 exit:
 288         kfree(configs);
 289         return ret;
 290 }
 291
 292 static int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 293                                         struct device_node *np_config,
 294                                         struct pinctrl_map **map,
 295                                         unsigned *num_maps)
 296 {
 297         unsigned reserved_maps;
 298         struct device_node *np;
 299         int ret;
 300
 301         reserved_maps = 0;
 302         *map = NULL;
 303         *num_maps = 0;
 304
 305         for_each_child_of_node(np_config, np) {
 306                 ret = tegra_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
 307                                                       &reserved_maps, num_maps);
 308                 if (ret < 0) {
 309                         tegra_pinctrl_dt_free_map(pctldev, *map, *num_maps);
 310                         return ret;
 311                 }
 312         }
 313
 314         return 0;
 315 }
 316
 317 static struct pinctrl_ops tegra_pinctrl_ops = {
 318         .get_groups_count = tegra_pinctrl_get_groups_count,
 319         .get_group_name = tegra_pinctrl_get_group_name,
 320         .get_group_pins = tegra_pinctrl_get_group_pins,
 321 #ifdef CONFIG_DEBUG_FS
 322         .pin_dbg_show = tegra_pinctrl_pin_dbg_show,
 323 #endif
 324         .dt_node_to_map = tegra_pinctrl_dt_node_to_map,
 325         .dt_free_map = tegra_pinctrl_dt_free_map,
 326 };
 327
 328 static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
 329 {
 330         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 331
 332         return pmx->soc->nfunctions;
 333 }
 334
 335 static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
 336                                                unsigned function)
 337 {
 338         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 339
 340         return pmx->soc->functions[function].name;
 341 }
 342
 343 static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
 344                                          unsigned function,
 345                                          const char * const **groups,
 346                                          unsigned * const num_groups)
 347 {
 348         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 349
 350         *groups = pmx->soc->functions[function].groups;
 351         *num_groups = pmx->soc->functions[function].ngroups;
 352
 353         return 0;
 354 }
 355
 356 static int tegra_pinctrl_enable(struct pinctrl_dev *pctldev, unsigned function,
 357                                unsigned group)
 358 {
 359         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 360         const struct tegra_pingroup *g;
 361         int i;
 362         u32 val;
 363
 364         g = &pmx->soc->groups[group];
 365
 366         if (WARN_ON(g->mux_reg < 0))
 367                 return -EINVAL;
 368
 369         for (i = 0; i < ARRAY_SIZE(g->funcs); i++) {
 370                 if (g->funcs[i] == function)
 371                         break;
 372         }
 373         if (WARN_ON(i == ARRAY_SIZE(g->funcs)))
 374                 return -EINVAL;
 375
 376         val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
 377         val &= ~(0x3 << g->mux_bit);
 378         val |= i << g->mux_bit;
 379         pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
 380
 381         return 0;
 382 }
 383
 384 static void tegra_pinctrl_disable(struct pinctrl_dev *pctldev,
 385                                   unsigned function, unsigned group)
 386 {
 387         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 388         const struct tegra_pingroup *g;
 389         u32 val;
 390
 391         g = &pmx->soc->groups[group];
 392
 393         if (WARN_ON(g->mux_reg < 0))
 394                 return;
 395
 396         val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
 397         val &= ~(0x3 << g->mux_bit);
 398         val |= g->func_safe << g->mux_bit;
 399         pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
 400 }
 401
 402 static struct pinmux_ops tegra_pinmux_ops = {
 403         .get_functions_count = tegra_pinctrl_get_funcs_count,
 404         .get_function_name = tegra_pinctrl_get_func_name,
 405         .get_function_groups = tegra_pinctrl_get_func_groups,
 406         .enable = tegra_pinctrl_enable,
 407         .disable = tegra_pinctrl_disable,
 408 };
 409
 410 static int tegra_pinconf_reg(struct tegra_pmx *pmx,
 411                              const struct tegra_pingroup *g,
 412                              enum tegra_pinconf_param param,
 413                              bool report_err,
 414                              s8 *bank, s16 *reg, s8 *bit, s8 *width)
 415 {
 416         switch (param) {
 417         case TEGRA_PINCONF_PARAM_PULL:
 418                 *bank = g->pupd_bank;
 419                 *reg = g->pupd_reg;
 420                 *bit = g->pupd_bit;
 421                 *width = 2;
 422                 break;
 423         case TEGRA_PINCONF_PARAM_TRISTATE:
 424                 *bank = g->tri_bank;
 425                 *reg = g->tri_reg;
 426                 *bit = g->tri_bit;
 427                 *width = 1;
 428                 break;
 429         case TEGRA_PINCONF_PARAM_ENABLE_INPUT:
 430                 *bank = g->einput_bank;
 431                 *reg = g->einput_reg;
 432                 *bit = g->einput_bit;
 433                 *width = 1;
 434                 break;
 435         case TEGRA_PINCONF_PARAM_OPEN_DRAIN:
 436                 *bank = g->odrain_bank;
 437                 *reg = g->odrain_reg;
 438                 *bit = g->odrain_bit;
 439                 *width = 1;
 440                 break;
 441         case TEGRA_PINCONF_PARAM_LOCK:
 442                 *bank = g->lock_bank;
 443                 *reg = g->lock_reg;
 444                 *bit = g->lock_bit;
 445                 *width = 1;
 446                 break;
 447         case TEGRA_PINCONF_PARAM_IORESET:
 448                 *bank = g->ioreset_bank;
 449                 *reg = g->ioreset_reg;
 450                 *bit = g->ioreset_bit;
 451                 *width = 1;
 452                 break;
 453         case TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE:
 454                 *bank = g->drv_bank;
 455                 *reg = g->drv_reg;
 456                 *bit = g->hsm_bit;
 457                 *width = 1;
 458                 break;
 459         case TEGRA_PINCONF_PARAM_SCHMITT:
 460                 *bank = g->drv_bank;
 461                 *reg = g->drv_reg;
 462                 *bit = g->schmitt_bit;
 463                 *width = 1;
 464                 break;
 465         case TEGRA_PINCONF_PARAM_LOW_POWER_MODE:
 466                 *bank = g->drv_bank;
 467                 *reg = g->drv_reg;
 468                 *bit = g->lpmd_bit;
 469                 *width = 2;
 470                 break;
 471         case TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH:
 472                 *bank = g->drv_bank;
 473                 *reg = g->drv_reg;
 474                 *bit = g->drvdn_bit;
 475                 *width = g->drvdn_width;
 476                 break;
 477         case TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH:
 478                 *bank = g->drv_bank;
 479                 *reg = g->drv_reg;
 480                 *bit = g->drvup_bit;
 481                 *width = g->drvup_width;
 482                 break;
 483         case TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING:
 484                 *bank = g->drv_bank;
 485                 *reg = g->drv_reg;
 486                 *bit = g->slwf_bit;
 487                 *width = g->slwf_width;
 488                 break;
 489         case TEGRA_PINCONF_PARAM_SLEW_RATE_RISING:
 490                 *bank = g->drv_bank;
 491                 *reg = g->drv_reg;
 492                 *bit = g->slwr_bit;
 493                 *width = g->slwr_width;
 494                 break;
 495         default:
 496                 dev_err(pmx->dev, "Invalid config param %04x\n", param);
 497                 return -ENOTSUPP;
 498         }
 499
 500         if (*reg < 0) {
 501                 if (report_err)
 502                         dev_err(pmx->dev,
 503                                 "Config param %04x not supported on group %s\n",
 504                                 param, g->name);
 505                 return -ENOTSUPP;
 506         }
 507
 508         return 0;
 509 }
 510
 511 static int tegra_pinconf_get(struct pinctrl_dev *pctldev,
 512                              unsigned pin, unsigned long *config)
 513 {
 514         dev_err(pctldev->dev, "pin_config_get op not supported\n");
 515         return -ENOTSUPP;
 516 }
 517
 518 static int tegra_pinconf_set(struct pinctrl_dev *pctldev,
 519                              unsigned pin, unsigned long config)
 520 {
 521         dev_err(pctldev->dev, "pin_config_set op not supported\n");
 522         return -ENOTSUPP;
 523 }
 524
 525 static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev,
 526                                    unsigned group, unsigned long *config)
 527 {
 528         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 529         enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(*config);
 530         u16 arg;
 531         const struct tegra_pingroup *g;
 532         int ret;
 533         s8 bank, bit, width;
 534         s16 reg;
 535         u32 val, mask;
 536
 537         g = &pmx->soc->groups[group];
 538
 539         ret = tegra_pinconf_reg(pmx, g, param, true, &bank, &reg, &bit,
 540                                 &width);
 541         if (ret < 0)
 542                 return ret;
 543
 544         val = pmx_readl(pmx, bank, reg);
 545         mask = (1 << width) - 1;
 546         arg = (val >> bit) & mask;
 547
 548         *config = TEGRA_PINCONF_PACK(param, arg);
 549
 550         return 0;
 551 }
 552
 553 static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
 554                                    unsigned group, unsigned long config)
 555 {
 556         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 557         enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
 558         u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
 559         const struct tegra_pingroup *g;
 560         int ret;
 561         s8 bank, bit, width;
 562         s16 reg;
 563         u32 val, mask;
 564
 565         g = &pmx->soc->groups[group];
 566
 567         ret = tegra_pinconf_reg(pmx, g, param, true, &bank, &reg, &bit,
 568                                 &width);
 569         if (ret < 0)
 570                 return ret;
 571
 572         val = pmx_readl(pmx, bank, reg);
 573
 574         /* LOCK can't be cleared */
 575         if (param == TEGRA_PINCONF_PARAM_LOCK) {
 576                 if ((val & BIT(bit)) && !arg) {
 577                         dev_err(pctldev->dev, "LOCK bit cannot be cleared\n");
 578                         return -EINVAL;
 579                 }
 580         }
 581
 582         /* Special-case Boolean values; allow any non-zero as true */
 583         if (width == 1)
 584                 arg = !!arg;
 585
 586         /* Range-check user-supplied value */
 587         mask = (1 << width) - 1;
 588         if (arg & ~mask) {
 589                 dev_err(pctldev->dev,
 590                         "config %lx: %x too big for %d bit register\n",
 591                         config, arg, width);
 592                 return -EINVAL;
 593         }
 594
 595         /* Update register */
 596         val &= ~(mask << bit);
 597         val |= arg << bit;
 598         pmx_writel(pmx, val, bank, reg);
 599
 600         return 0;
 601 }
 602
 603 #ifdef CONFIG_DEBUG_FS
 604 static void tegra_pinconf_dbg_show(struct pinctrl_dev *pctldev,
 605                                    struct seq_file *s, unsigned offset)
 606 {
 607 }
 608
 609 static const char *strip_prefix(const char *s)
 610 {
 611         const char *comma = strchr(s, ',');
 612         if (!comma)
 613                 return s;
 614
 615         return comma + 1;
 616 }
 617
 618 static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
 619                                          struct seq_file *s, unsigned group)
 620 {
 621         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 622         const struct tegra_pingroup *g;
 623         int i, ret;
 624         s8 bank, bit, width;
 625         s16 reg;
 626         u32 val;
 627
 628         g = &pmx->soc->groups[group];
 629
 630         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
 631                 ret = tegra_pinconf_reg(pmx, g, cfg_params[i].param, false,
 632                                         &bank, &reg, &bit, &width);
 633                 if (ret < 0)
 634                         continue;
 635
 636                 val = pmx_readl(pmx, bank, reg);
 637                 val >>= bit;
 638                 val &= (1 << width) - 1;
 639
 640                 seq_printf(s, "\n\t%s=%u",
 641                            strip_prefix(cfg_params[i].property), val);
 642         }
 643 }
 644
 645 static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,
 646                                           struct seq_file *s,
 647                                           unsigned long config)
 648 {
 649         enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
 650         u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
 651         const char *pname = "unknown";
 652         int i;
 653
 654         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
 655                 if (cfg_params[i].param == param) {
 656                         pname = cfg_params[i].property;
 657                         break;
 658                 }
 659         }
 660
 661         seq_printf(s, "%s=%d", strip_prefix(pname), arg);
 662 }
 663 #endif
 664
 665 static struct pinconf_ops tegra_pinconf_ops = {
 666         .pin_config_get = tegra_pinconf_get,
 667         .pin_config_set = tegra_pinconf_set,
 668         .pin_config_group_get = tegra_pinconf_group_get,
 669         .pin_config_group_set = tegra_pinconf_group_set,
 670 #ifdef CONFIG_DEBUG_FS
 671         .pin_config_dbg_show = tegra_pinconf_dbg_show,
 672         .pin_config_group_dbg_show = tegra_pinconf_group_dbg_show,
 673         .pin_config_config_dbg_show = tegra_pinconf_config_dbg_show,
 674 #endif
 675 };
 676
 677 static struct pinctrl_gpio_range tegra_pinctrl_gpio_range = {
 678         .name = "Tegra GPIOs",
 679         .id = 0,
 680         .base = 0,
 681 };
 682
 683 static struct pinctrl_desc tegra_pinctrl_desc = {
 684         .pctlops = &tegra_pinctrl_ops,
 685         .pmxops = &tegra_pinmux_ops,
 686         .confops = &tegra_pinconf_ops,
 687         .owner = THIS_MODULE,
 688 };
 689
 690 int __devinit tegra_pinctrl_probe(struct platform_device *pdev,
 691                         const struct tegra_pinctrl_soc_data *soc_data)
 692 {
 693         struct tegra_pmx *pmx;
 694         struct resource *res;
 695         int i;
 696
 697         pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
 698         if (!pmx) {
 699                 dev_err(&pdev->dev, "Can't alloc tegra_pmx\n");
 700                 return -ENOMEM;
 701         }
 702         pmx->dev = &pdev->dev;
 703         pmx->soc = soc_data;
 704
 705         tegra_pinctrl_gpio_range.npins = pmx->soc->ngpios;
 706         tegra_pinctrl_desc.name = dev_name(&pdev->dev);
 707         tegra_pinctrl_desc.pins = pmx->soc->pins;
 708         tegra_pinctrl_desc.npins = pmx->soc->npins;
 709
 710         for (i = 0; ; i++) {
 711                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 712                 if (!res)
 713                         break;
 714         }
 715         pmx->nbanks = i;
 716
 717         pmx->regs = devm_kzalloc(&pdev->dev, pmx->nbanks * sizeof(*pmx->regs),
 718                                  GFP_KERNEL);
 719         if (!pmx->regs) {
 720                 dev_err(&pdev->dev, "Can't alloc regs pointer\n");
 721                 return -ENODEV;
 722         }
 723
 724         for (i = 0; i < pmx->nbanks; i++) {
 725                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 726                 if (!res) {
 727                         dev_err(&pdev->dev, "Missing MEM resource\n");
 728                         return -ENODEV;
 729                 }
 730
 731                 if (!devm_request_mem_region(&pdev->dev, res->start,
 732                                             resource_size(res),
 733                                             dev_name(&pdev->dev))) {
 734                         dev_err(&pdev->dev,
 735                                 "Couldn't request MEM resource %d\n", i);
 736                         return -ENODEV;
 737                 }
 738
 739                 pmx->regs[i] = devm_ioremap(&pdev->dev, res->start,
 740                                             resource_size(res));
 741                 if (!pmx->regs[i]) {
 742                         dev_err(&pdev->dev, "Couldn't ioremap regs %d\n", i);
 743                         return -ENODEV;
 744                 }
 745         }
 746
 747         pmx->pctl = pinctrl_register(&tegra_pinctrl_desc, &pdev->dev, pmx);
 748         if (!pmx->pctl) {
 749                 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
 750                 return -ENODEV;
 751         }
 752
 753         pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range);
 754
 755         platform_set_drvdata(pdev, pmx);
 756
 757         dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n");
 758
 759         return 0;
 760 }
 761 EXPORT_SYMBOL_GPL(tegra_pinctrl_probe);
 762
 763 int tegra_pinctrl_remove(struct platform_device *pdev)
 764 {
 765         struct tegra_pmx *pmx = platform_get_drvdata(pdev);
 766
 767         pinctrl_unregister(pmx->pctl);
 768
 769         return 0;
 770 }
 771 EXPORT_SYMBOL_GPL(tegra_pinctrl_remove);