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,rcv-sel",              TEGRA_PINCONF_PARAM_RCV_SEL},
 205         {"nvidia,high-speed-mode",      TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE},
 206         {"nvidia,schmitt",              TEGRA_PINCONF_PARAM_SCHMITT},
 207         {"nvidia,low-power-mode",       TEGRA_PINCONF_PARAM_LOW_POWER_MODE},
 208         {"nvidia,pull-down-strength",   TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH},
 209         {"nvidia,pull-up-strength",     TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH},
 210         {"nvidia,slew-rate-falling",    TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
 211         {"nvidia,slew-rate-rising",     TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
 212         {"nvidia,drive-type",           TEGRA_PINCONF_PARAM_DRIVE_TYPE},
 213 };
 214
 215 static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
 216                                            struct device_node *np,
 217                                            struct pinctrl_map **map,
 218                                            unsigned *reserved_maps,
 219                                            unsigned *num_maps)
 220 {
 221         int ret, i;
 222         const char *function;
 223         u32 val;
 224         unsigned long config;
 225         unsigned long *configs = NULL;
 226         unsigned num_configs = 0;
 227         unsigned reserve;
 228         struct property *prop;
 229         const char *group;
 230
 231         ret = of_property_read_string(np, "nvidia,function", &function);
 232         if (ret < 0) {
 233                 /* EINVAL=missing, which is fine since it's optional */
 234                 if (ret != -EINVAL)
 235                         dev_err(dev,
 236                                 "could not parse property nvidia,function\n");
 237                 function = NULL;
 238         }
 239
 240         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
 241                 ret = of_property_read_u32(np, cfg_params[i].property, &val);
 242                 if (!ret) {
 243                         config = TEGRA_PINCONF_PACK(cfg_params[i].param, val);
 244                         ret = add_config(dev, &configs, &num_configs, config);
 245                         if (ret < 0)
 246                                 goto exit;
 247                 /* EINVAL=missing, which is fine since it's optional */
 248                 } else if (ret != -EINVAL) {
 249                         dev_err(dev, "could not parse property %s\n",
 250                                 cfg_params[i].property);
 251                 }
 252         }
 253
 254         reserve = 0;
 255         if (function != NULL)
 256                 reserve++;
 257         if (num_configs)
 258                 reserve++;
 259         ret = of_property_count_strings(np, "nvidia,pins");
 260         if (ret < 0) {
 261                 dev_err(dev, "could not parse property nvidia,pins\n");
 262                 goto exit;
 263         }
 264         reserve *= ret;
 265
 266         ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
 267         if (ret < 0)
 268                 goto exit;
 269
 270         of_property_for_each_string(np, "nvidia,pins", prop, group) {
 271                 if (function) {
 272                         ret = add_map_mux(map, reserved_maps, num_maps,
 273                                           group, function);
 274                         if (ret < 0)
 275                                 goto exit;
 276                 }
 277
 278                 if (num_configs) {
 279                         ret = add_map_configs(dev, map, reserved_maps,
 280                                               num_maps, group, configs,
 281                                               num_configs);
 282                         if (ret < 0)
 283                                 goto exit;
 284                 }
 285         }
 286
 287         ret = 0;
 288
 289 exit:
 290         kfree(configs);
 291         return ret;
 292 }
 293
 294 static int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 295                                         struct device_node *np_config,
 296                                         struct pinctrl_map **map,
 297                                         unsigned *num_maps)
 298 {
 299         unsigned reserved_maps;
 300         struct device_node *np;
 301         int ret;
 302
 303         reserved_maps = 0;
 304         *map = NULL;
 305         *num_maps = 0;
 306
 307         for_each_child_of_node(np_config, np) {
 308                 ret = tegra_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
 309                                                       &reserved_maps, num_maps);
 310                 if (ret < 0) {
 311                         tegra_pinctrl_dt_free_map(pctldev, *map, *num_maps);
 312                         return ret;
 313                 }
 314         }
 315
 316         return 0;
 317 }
 318
 319 static const struct pinctrl_ops tegra_pinctrl_ops = {
 320         .get_groups_count = tegra_pinctrl_get_groups_count,
 321         .get_group_name = tegra_pinctrl_get_group_name,
 322         .get_group_pins = tegra_pinctrl_get_group_pins,
 323 #ifdef CONFIG_DEBUG_FS
 324         .pin_dbg_show = tegra_pinctrl_pin_dbg_show,
 325 #endif
 326         .dt_node_to_map = tegra_pinctrl_dt_node_to_map,
 327         .dt_free_map = tegra_pinctrl_dt_free_map,
 328 };
 329
 330 static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
 331 {
 332         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 333
 334         return pmx->soc->nfunctions;
 335 }
 336
 337 static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
 338                                                unsigned function)
 339 {
 340         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 341
 342         return pmx->soc->functions[function].name;
 343 }
 344
 345 static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
 346                                          unsigned function,
 347                                          const char * const **groups,
 348                                          unsigned * const num_groups)
 349 {
 350         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 351
 352         *groups = pmx->soc->functions[function].groups;
 353         *num_groups = pmx->soc->functions[function].ngroups;
 354
 355         return 0;
 356 }
 357
 358 static int tegra_pinctrl_enable(struct pinctrl_dev *pctldev, unsigned function,
 359                                unsigned group)
 360 {
 361         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 362         const struct tegra_pingroup *g;
 363         int i;
 364         u32 val;
 365
 366         g = &pmx->soc->groups[group];
 367
 368         if (WARN_ON(g->mux_reg < 0))
 369                 return -EINVAL;
 370
 371         for (i = 0; i < ARRAY_SIZE(g->funcs); i++) {
 372                 if (g->funcs[i] == function)
 373                         break;
 374         }
 375         if (WARN_ON(i == ARRAY_SIZE(g->funcs)))
 376                 return -EINVAL;
 377
 378         val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
 379         val &= ~(0x3 << g->mux_bit);
 380         val |= i << g->mux_bit;
 381         pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
 382
 383         return 0;
 384 }
 385
 386 static void tegra_pinctrl_disable(struct pinctrl_dev *pctldev,
 387                                   unsigned function, unsigned group)
 388 {
 389         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 390         const struct tegra_pingroup *g;
 391         u32 val;
 392
 393         g = &pmx->soc->groups[group];
 394
 395         if (WARN_ON(g->mux_reg < 0))
 396                 return;
 397
 398         val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
 399         val &= ~(0x3 << g->mux_bit);
 400         val |= g->func_safe << g->mux_bit;
 401         pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
 402 }
 403
 404 static const struct pinmux_ops tegra_pinmux_ops = {
 405         .get_functions_count = tegra_pinctrl_get_funcs_count,
 406         .get_function_name = tegra_pinctrl_get_func_name,
 407         .get_function_groups = tegra_pinctrl_get_func_groups,
 408         .enable = tegra_pinctrl_enable,
 409         .disable = tegra_pinctrl_disable,
 410 };
 411
 412 static int tegra_pinconf_reg(struct tegra_pmx *pmx,
 413                              const struct tegra_pingroup *g,
 414                              enum tegra_pinconf_param param,
 415                              bool report_err,
 416                              s8 *bank, s16 *reg, s8 *bit, s8 *width)
 417 {
 418         switch (param) {
 419         case TEGRA_PINCONF_PARAM_PULL:
 420                 *bank = g->pupd_bank;
 421                 *reg = g->pupd_reg;
 422                 *bit = g->pupd_bit;
 423                 *width = 2;
 424                 break;
 425         case TEGRA_PINCONF_PARAM_TRISTATE:
 426                 *bank = g->tri_bank;
 427                 *reg = g->tri_reg;
 428                 *bit = g->tri_bit;
 429                 *width = 1;
 430                 break;
 431         case TEGRA_PINCONF_PARAM_ENABLE_INPUT:
 432                 *bank = g->einput_bank;
 433                 *reg = g->einput_reg;
 434                 *bit = g->einput_bit;
 435                 *width = 1;
 436                 break;
 437         case TEGRA_PINCONF_PARAM_OPEN_DRAIN:
 438                 *bank = g->odrain_bank;
 439                 *reg = g->odrain_reg;
 440                 *bit = g->odrain_bit;
 441                 *width = 1;
 442                 break;
 443         case TEGRA_PINCONF_PARAM_LOCK:
 444                 *bank = g->lock_bank;
 445                 *reg = g->lock_reg;
 446                 *bit = g->lock_bit;
 447                 *width = 1;
 448                 break;
 449         case TEGRA_PINCONF_PARAM_IORESET:
 450                 *bank = g->ioreset_bank;
 451                 *reg = g->ioreset_reg;
 452                 *bit = g->ioreset_bit;
 453                 *width = 1;
 454                 break;
 455         case TEGRA_PINCONF_PARAM_RCV_SEL:
 456                 *bank = g->rcv_sel_bank;
 457                 *reg = g->rcv_sel_reg;
 458                 *bit = g->rcv_sel_bit;
 459                 *width = 1;
 460                 break;
 461         case TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE:
 462                 *bank = g->drv_bank;
 463                 *reg = g->drv_reg;
 464                 *bit = g->hsm_bit;
 465                 *width = 1;
 466                 break;
 467         case TEGRA_PINCONF_PARAM_SCHMITT:
 468                 *bank = g->drv_bank;
 469                 *reg = g->drv_reg;
 470                 *bit = g->schmitt_bit;
 471                 *width = 1;
 472                 break;
 473         case TEGRA_PINCONF_PARAM_LOW_POWER_MODE:
 474                 *bank = g->drv_bank;
 475                 *reg = g->drv_reg;
 476                 *bit = g->lpmd_bit;
 477                 *width = 2;
 478                 break;
 479         case TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH:
 480                 *bank = g->drv_bank;
 481                 *reg = g->drv_reg;
 482                 *bit = g->drvdn_bit;
 483                 *width = g->drvdn_width;
 484                 break;
 485         case TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH:
 486                 *bank = g->drv_bank;
 487                 *reg = g->drv_reg;
 488                 *bit = g->drvup_bit;
 489                 *width = g->drvup_width;
 490                 break;
 491         case TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING:
 492                 *bank = g->drv_bank;
 493                 *reg = g->drv_reg;
 494                 *bit = g->slwf_bit;
 495                 *width = g->slwf_width;
 496                 break;
 497         case TEGRA_PINCONF_PARAM_SLEW_RATE_RISING:
 498                 *bank = g->drv_bank;
 499                 *reg = g->drv_reg;
 500                 *bit = g->slwr_bit;
 501                 *width = g->slwr_width;
 502                 break;
 503         case TEGRA_PINCONF_PARAM_DRIVE_TYPE:
 504                 *bank = g->drvtype_bank;
 505                 *reg = g->drvtype_reg;
 506                 *bit = g->drvtype_bit;
 507                 *width = 2;
 508                 break;
 509         default:
 510                 dev_err(pmx->dev, "Invalid config param %04x\n", param);
 511                 return -ENOTSUPP;
 512         }
 513
 514         if (*reg < 0) {
 515                 if (report_err)
 516                         dev_err(pmx->dev,
 517                                 "Config param %04x not supported on group %s\n",
 518                                 param, g->name);
 519                 return -ENOTSUPP;
 520         }
 521
 522         return 0;
 523 }
 524
 525 static int tegra_pinconf_get(struct pinctrl_dev *pctldev,
 526                              unsigned pin, unsigned long *config)
 527 {
 528         dev_err(pctldev->dev, "pin_config_get op not supported\n");
 529         return -ENOTSUPP;
 530 }
 531
 532 static int tegra_pinconf_set(struct pinctrl_dev *pctldev,
 533                              unsigned pin, unsigned long config)
 534 {
 535         dev_err(pctldev->dev, "pin_config_set op not supported\n");
 536         return -ENOTSUPP;
 537 }
 538
 539 static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev,
 540                                    unsigned group, unsigned long *config)
 541 {
 542         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 543         enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(*config);
 544         u16 arg;
 545         const struct tegra_pingroup *g;
 546         int ret;
 547         s8 bank, bit, width;
 548         s16 reg;
 549         u32 val, mask;
 550
 551         g = &pmx->soc->groups[group];
 552
 553         ret = tegra_pinconf_reg(pmx, g, param, true, &bank, &reg, &bit,
 554                                 &width);
 555         if (ret < 0)
 556                 return ret;
 557
 558         val = pmx_readl(pmx, bank, reg);
 559         mask = (1 << width) - 1;
 560         arg = (val >> bit) & mask;
 561
 562         *config = TEGRA_PINCONF_PACK(param, arg);
 563
 564         return 0;
 565 }
 566
 567 static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
 568                                    unsigned group, unsigned long config)
 569 {
 570         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 571         enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
 572         u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
 573         const struct tegra_pingroup *g;
 574         int ret;
 575         s8 bank, bit, width;
 576         s16 reg;
 577         u32 val, mask;
 578
 579         g = &pmx->soc->groups[group];
 580
 581         ret = tegra_pinconf_reg(pmx, g, param, true, &bank, &reg, &bit,
 582                                 &width);
 583         if (ret < 0)
 584                 return ret;
 585
 586         val = pmx_readl(pmx, bank, reg);
 587
 588         /* LOCK can't be cleared */
 589         if (param == TEGRA_PINCONF_PARAM_LOCK) {
 590                 if ((val & BIT(bit)) && !arg) {
 591                         dev_err(pctldev->dev, "LOCK bit cannot be cleared\n");
 592                         return -EINVAL;
 593                 }
 594         }
 595
 596         /* Special-case Boolean values; allow any non-zero as true */
 597         if (width == 1)
 598                 arg = !!arg;
 599
 600         /* Range-check user-supplied value */
 601         mask = (1 << width) - 1;
 602         if (arg & ~mask) {
 603                 dev_err(pctldev->dev,
 604                         "config %lx: %x too big for %d bit register\n",
 605                         config, arg, width);
 606                 return -EINVAL;
 607         }
 608
 609         /* Update register */
 610         val &= ~(mask << bit);
 611         val |= arg << bit;
 612         pmx_writel(pmx, val, bank, reg);
 613
 614         return 0;
 615 }
 616
 617 #ifdef CONFIG_DEBUG_FS
 618 static void tegra_pinconf_dbg_show(struct pinctrl_dev *pctldev,
 619                                    struct seq_file *s, unsigned offset)
 620 {
 621 }
 622
 623 static const char *strip_prefix(const char *s)
 624 {
 625         const char *comma = strchr(s, ',');
 626         if (!comma)
 627                 return s;
 628
 629         return comma + 1;
 630 }
 631
 632 static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
 633                                          struct seq_file *s, unsigned group)
 634 {
 635         struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 636         const struct tegra_pingroup *g;
 637         int i, ret;
 638         s8 bank, bit, width;
 639         s16 reg;
 640         u32 val;
 641
 642         g = &pmx->soc->groups[group];
 643
 644         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
 645                 ret = tegra_pinconf_reg(pmx, g, cfg_params[i].param, false,
 646                                         &bank, &reg, &bit, &width);
 647                 if (ret < 0)
 648                         continue;
 649
 650                 val = pmx_readl(pmx, bank, reg);
 651                 val >>= bit;
 652                 val &= (1 << width) - 1;
 653
 654                 seq_printf(s, "\n\t%s=%u",
 655                            strip_prefix(cfg_params[i].property), val);
 656         }
 657 }
 658
 659 static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,
 660                                           struct seq_file *s,
 661                                           unsigned long config)
 662 {
 663         enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
 664         u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
 665         const char *pname = "unknown";
 666         int i;
 667
 668         for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
 669                 if (cfg_params[i].param == param) {
 670                         pname = cfg_params[i].property;
 671                         break;
 672                 }
 673         }
 674
 675         seq_printf(s, "%s=%d", strip_prefix(pname), arg);
 676 }
 677 #endif
 678
 679 static const struct pinconf_ops tegra_pinconf_ops = {
 680         .pin_config_get = tegra_pinconf_get,
 681         .pin_config_set = tegra_pinconf_set,
 682         .pin_config_group_get = tegra_pinconf_group_get,
 683         .pin_config_group_set = tegra_pinconf_group_set,
 684 #ifdef CONFIG_DEBUG_FS
 685         .pin_config_dbg_show = tegra_pinconf_dbg_show,
 686         .pin_config_group_dbg_show = tegra_pinconf_group_dbg_show,
 687         .pin_config_config_dbg_show = tegra_pinconf_config_dbg_show,
 688 #endif
 689 };
 690
 691 static struct pinctrl_gpio_range tegra_pinctrl_gpio_range = {
 692         .name = "Tegra GPIOs",
 693         .id = 0,
 694         .base = 0,
 695 };
 696
 697 static struct pinctrl_desc tegra_pinctrl_desc = {
 698         .pctlops = &tegra_pinctrl_ops,
 699         .pmxops = &tegra_pinmux_ops,
 700         .confops = &tegra_pinconf_ops,
 701         .owner = THIS_MODULE,
 702 };
 703
 704 int tegra_pinctrl_probe(struct platform_device *pdev,
 705                         const struct tegra_pinctrl_soc_data *soc_data)
 706 {
 707         struct tegra_pmx *pmx;
 708         struct resource *res;
 709         int i;
 710
 711         pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
 712         if (!pmx) {
 713                 dev_err(&pdev->dev, "Can't alloc tegra_pmx\n");
 714                 return -ENOMEM;
 715         }
 716         pmx->dev = &pdev->dev;
 717         pmx->soc = soc_data;
 718
 719         tegra_pinctrl_gpio_range.npins = pmx->soc->ngpios;
 720         tegra_pinctrl_desc.name = dev_name(&pdev->dev);
 721         tegra_pinctrl_desc.pins = pmx->soc->pins;
 722         tegra_pinctrl_desc.npins = pmx->soc->npins;
 723
 724         for (i = 0; ; i++) {
 725                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 726                 if (!res)
 727                         break;
 728         }
 729         pmx->nbanks = i;
 730
 731         pmx->regs = devm_kzalloc(&pdev->dev, pmx->nbanks * sizeof(*pmx->regs),
 732                                  GFP_KERNEL);
 733         if (!pmx->regs) {
 734                 dev_err(&pdev->dev, "Can't alloc regs pointer\n");
 735                 return -ENODEV;
 736         }
 737
 738         for (i = 0; i < pmx->nbanks; i++) {
 739                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 740                 if (!res) {
 741                         dev_err(&pdev->dev, "Missing MEM resource\n");
 742                         return -ENODEV;
 743                 }
 744
 745                 if (!devm_request_mem_region(&pdev->dev, res->start,
 746                                             resource_size(res),
 747                                             dev_name(&pdev->dev))) {
 748                         dev_err(&pdev->dev,
 749                                 "Couldn't request MEM resource %d\n", i);
 750                         return -ENODEV;
 751                 }
 752
 753                 pmx->regs[i] = devm_ioremap(&pdev->dev, res->start,
 754                                             resource_size(res));
 755                 if (!pmx->regs[i]) {
 756                         dev_err(&pdev->dev, "Couldn't ioremap regs %d\n", i);
 757                         return -ENODEV;
 758                 }
 759         }
 760
 761         pmx->pctl = pinctrl_register(&tegra_pinctrl_desc, &pdev->dev, pmx);
 762         if (!pmx->pctl) {
 763                 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
 764                 return -ENODEV;
 765         }
 766
 767         pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range);
 768
 769         platform_set_drvdata(pdev, pmx);
 770
 771         dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n");
 772
 773         return 0;
 774 }
 775 EXPORT_SYMBOL_GPL(tegra_pinctrl_probe);
 776
 777 int tegra_pinctrl_remove(struct platform_device *pdev)
 778 {
 779         struct tegra_pmx *pmx = platform_get_drvdata(pdev);
 780
 781         pinctrl_unregister(pmx->pctl);
 782
 783         return 0;
 784 }
 785 EXPORT_SYMBOL_GPL(tegra_pinctrl_remove);