drivers/pinctrl/pinctrl-rockchip.c

   1 /*
   2  * Pinctrl driver for Rockchip SoCs
   3  *
   4  * Copyright (c) 2013 MundoReader S.L.
   5  * Author: Heiko Stuebner <heiko@sntech.de>
   6  *
   7  * With some ideas taken from pinctrl-samsung:
   8  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   9  *              http://www.samsung.com
  10  * Copyright (c) 2012 Linaro Ltd
  11  *              http://www.linaro.org
  12  *
  13  * and pinctrl-at91:
  14  * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License version 2 as published
  18  * by the Free Software Foundation.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/io.h>
  29 #include <linux/bitops.h>
  30 #include <linux/gpio.h>
  31 #include <linux/of_address.h>
  32 #include <linux/of_irq.h>
  33 #include <linux/pinctrl/machine.h>
  34 #include <linux/pinctrl/pinconf.h>
  35 #include <linux/pinctrl/pinctrl.h>
  36 #include <linux/pinctrl/pinmux.h>
  37 #include <linux/pinctrl/pinconf-generic.h>
  38 #include <linux/irqchip/chained_irq.h>
  39 #include <linux/clk.h>
  40 #include <dt-bindings/pinctrl/rockchip.h>
  41
  42 #include "core.h"
  43 #include "pinconf.h"
  44
  45 /* GPIO control registers */
  46 #define GPIO_SWPORT_DR          0x00
  47 #define GPIO_SWPORT_DDR         0x04
  48 #define GPIO_INTEN              0x30
  49 #define GPIO_INTMASK            0x34
  50 #define GPIO_INTTYPE_LEVEL      0x38
  51 #define GPIO_INT_POLARITY       0x3c
  52 #define GPIO_INT_STATUS         0x40
  53 #define GPIO_INT_RAWSTATUS      0x44
  54 #define GPIO_DEBOUNCE           0x48
  55 #define GPIO_PORTS_EOI          0x4c
  56 #define GPIO_EXT_PORT           0x50
  57 #define GPIO_LS_SYNC            0x60
  58
  59 /**
  60  * @reg_base: register base of the gpio bank
  61  * @clk: clock of the gpio bank
  62  * @irq: interrupt of the gpio bank
  63  * @pin_base: first pin number
  64  * @nr_pins: number of pins in this bank
  65  * @name: name of the bank
  66  * @bank_num: number of the bank, to account for holes
  67  * @valid: are all necessary informations present
  68  * @of_node: dt node of this bank
  69  * @drvdata: common pinctrl basedata
  70  * @domain: irqdomain of the gpio bank
  71  * @gpio_chip: gpiolib chip
  72  * @grange: gpio range
  73  * @slock: spinlock for the gpio bank
  74  */
  75 struct rockchip_pin_bank {
  76         void __iomem                    *reg_base;
  77         struct clk                      *clk;
  78         int                             irq;
  79         u32                             pin_base;
  80         u8                              nr_pins;
  81         char                            *name;
  82         u8                              bank_num;
  83         bool                            valid;
  84         struct device_node              *of_node;
  85         struct rockchip_pinctrl         *drvdata;
  86         struct irq_domain               *domain;
  87         struct gpio_chip                gpio_chip;
  88         struct pinctrl_gpio_range       grange;
  89         spinlock_t                      slock;
  90
  91 };
  92
  93 #define PIN_BANK(id, pins, label)                       \
  94         {                                               \
  95                 .bank_num       = id,                   \
  96                 .nr_pins        = pins,                 \
  97                 .name           = label,                \
  98         }
  99
 100 /**
 101  * @pull_auto: some SoCs don't allow pulls to be specified as up or down, but
 102  *             instead decide this automatically based on the pad-type.
 103  */
 104 struct rockchip_pin_ctrl {
 105         struct rockchip_pin_bank        *pin_banks;
 106         u32                             nr_banks;
 107         u32                             nr_pins;
 108         char                            *label;
 109         int                             mux_offset;
 110         int                             pull_offset;
 111         bool                            pull_auto;
 112         int                             pull_bank_stride;
 113 };
 114
 115 struct rockchip_pin_config {
 116         unsigned int            func;
 117         unsigned long           *configs;
 118         unsigned int            nconfigs;
 119 };
 120
 121 /**
 122  * struct rockchip_pin_group: represent group of pins of a pinmux function.
 123  * @name: name of the pin group, used to lookup the group.
 124  * @pins: the pins included in this group.
 125  * @npins: number of pins included in this group.
 126  * @func: the mux function number to be programmed when selected.
 127  * @configs: the config values to be set for each pin
 128  * @nconfigs: number of configs for each pin
 129  */
 130 struct rockchip_pin_group {
 131         const char                      *name;
 132         unsigned int                    npins;
 133         unsigned int                    *pins;
 134         struct rockchip_pin_config      *data;
 135 };
 136
 137 /**
 138  * struct rockchip_pmx_func: represent a pin function.
 139  * @name: name of the pin function, used to lookup the function.
 140  * @groups: one or more names of pin groups that provide this function.
 141  * @num_groups: number of groups included in @groups.
 142  */
 143 struct rockchip_pmx_func {
 144         const char              *name;
 145         const char              **groups;
 146         u8                      ngroups;
 147 };
 148
 149 struct rockchip_pinctrl {
 150         void __iomem                    *reg_base;
 151         struct device                   *dev;
 152         struct rockchip_pin_ctrl        *ctrl;
 153         struct pinctrl_desc             pctl;
 154         struct pinctrl_dev              *pctl_dev;
 155         struct rockchip_pin_group       *groups;
 156         unsigned int                    ngroups;
 157         struct rockchip_pmx_func        *functions;
 158         unsigned int                    nfunctions;
 159 };
 160
 161 static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
 162 {
 163         return container_of(gc, struct rockchip_pin_bank, gpio_chip);
 164 }
 165
 166 static const inline struct rockchip_pin_group *pinctrl_name_to_group(
 167                                         const struct rockchip_pinctrl *info,
 168                                         const char *name)
 169 {
 170         int i;
 171
 172         for (i = 0; i < info->ngroups; i++) {
 173                 if (!strcmp(info->groups[i].name, name))
 174                         return &info->groups[i];
 175         }
 176
 177         return NULL;
 178 }
 179
 180 /*
 181  * given a pin number that is local to a pin controller, find out the pin bank
 182  * and the register base of the pin bank.
 183  */
 184 static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
 185                                                                 unsigned pin)
 186 {
 187         struct rockchip_pin_bank *b = info->ctrl->pin_banks;
 188
 189         while (pin >= (b->pin_base + b->nr_pins))
 190                 b++;
 191
 192         return b;
 193 }
 194
 195 static struct rockchip_pin_bank *bank_num_to_bank(
 196                                         struct rockchip_pinctrl *info,
 197                                         unsigned num)
 198 {
 199         struct rockchip_pin_bank *b = info->ctrl->pin_banks;
 200         int i;
 201
 202         for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
 203                 if (b->bank_num == num)
 204                         return b;
 205         }
 206
 207         return ERR_PTR(-EINVAL);
 208 }
 209
 210 /*
 211  * Pinctrl_ops handling
 212  */
 213
 214 static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
 215 {
 216         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 217
 218         return info->ngroups;
 219 }
 220
 221 static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
 222                                                         unsigned selector)
 223 {
 224         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 225
 226         return info->groups[selector].name;
 227 }
 228
 229 static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
 230                                       unsigned selector, const unsigned **pins,
 231                                       unsigned *npins)
 232 {
 233         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 234
 235         if (selector >= info->ngroups)
 236                 return -EINVAL;
 237
 238         *pins = info->groups[selector].pins;
 239         *npins = info->groups[selector].npins;
 240
 241         return 0;
 242 }
 243
 244 static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
 245                                  struct device_node *np,
 246                                  struct pinctrl_map **map, unsigned *num_maps)
 247 {
 248         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 249         const struct rockchip_pin_group *grp;
 250         struct pinctrl_map *new_map;
 251         struct device_node *parent;
 252         int map_num = 1;
 253         int i;
 254
 255         /*
 256          * first find the group of this node and check if we need to create
 257          * config maps for pins
 258          */
 259         grp = pinctrl_name_to_group(info, np->name);
 260         if (!grp) {
 261                 dev_err(info->dev, "unable to find group for node %s\n",
 262                         np->name);
 263                 return -EINVAL;
 264         }
 265
 266         map_num += grp->npins;
 267         new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
 268                                                                 GFP_KERNEL);
 269         if (!new_map)
 270                 return -ENOMEM;
 271
 272         *map = new_map;
 273         *num_maps = map_num;
 274
 275         /* create mux map */
 276         parent = of_get_parent(np);
 277         if (!parent) {
 278                 devm_kfree(pctldev->dev, new_map);
 279                 return -EINVAL;
 280         }
 281         new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
 282         new_map[0].data.mux.function = parent->name;
 283         new_map[0].data.mux.group = np->name;
 284         of_node_put(parent);
 285
 286         /* create config map */
 287         new_map++;
 288         for (i = 0; i < grp->npins; i++) {
 289                 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
 290                 new_map[i].data.configs.group_or_pin =
 291                                 pin_get_name(pctldev, grp->pins[i]);
 292                 new_map[i].data.configs.configs = grp->data[i].configs;
 293                 new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
 294         }
 295
 296         dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
 297                 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
 298
 299         return 0;
 300 }
 301
 302 static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
 303                                     struct pinctrl_map *map, unsigned num_maps)
 304 {
 305 }
 306
 307 static const struct pinctrl_ops rockchip_pctrl_ops = {
 308         .get_groups_count       = rockchip_get_groups_count,
 309         .get_group_name         = rockchip_get_group_name,
 310         .get_group_pins         = rockchip_get_group_pins,
 311         .dt_node_to_map         = rockchip_dt_node_to_map,
 312         .dt_free_map            = rockchip_dt_free_map,
 313 };
 314
 315 /*
 316  * Hardware access
 317  */
 318
 319 /*
 320  * Set a new mux function for a pin.
 321  *
 322  * The register is divided into the upper and lower 16 bit. When changing
 323  * a value, the previous register value is not read and changed. Instead
 324  * it seems the changed bits are marked in the upper 16 bit, while the
 325  * changed value gets set in the same offset in the lower 16 bit.
 326  * All pin settings seem to be 2 bit wide in both the upper and lower
 327  * parts.
 328  * @bank: pin bank to change
 329  * @pin: pin to change
 330  * @mux: new mux function to set
 331  */
 332 static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
 333 {
 334         struct rockchip_pinctrl *info = bank->drvdata;
 335         void __iomem *reg = info->reg_base + info->ctrl->mux_offset;
 336         unsigned long flags;
 337         u8 bit;
 338         u32 data;
 339
 340         dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
 341                                                 bank->bank_num, pin, mux);
 342
 343         /* get basic quadrupel of mux registers and the correct reg inside */
 344         reg += bank->bank_num * 0x10;
 345         reg += (pin / 8) * 4;
 346         bit = (pin % 8) * 2;
 347
 348         spin_lock_irqsave(&bank->slock, flags);
 349
 350         data = (3 << (bit + 16));
 351         data |= (mux & 3) << bit;
 352         writel(data, reg);
 353
 354         spin_unlock_irqrestore(&bank->slock, flags);
 355 }
 356
 357 static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
 358 {
 359         struct rockchip_pinctrl *info = bank->drvdata;
 360         struct rockchip_pin_ctrl *ctrl = info->ctrl;
 361         void __iomem *reg;
 362         u8 bit;
 363
 364         /* rk3066b does support any pulls */
 365         if (!ctrl->pull_offset)
 366                 return PIN_CONFIG_BIAS_DISABLE;
 367
 368         reg = info->reg_base + ctrl->pull_offset;
 369
 370         if (ctrl->pull_auto) {
 371                 reg += bank->bank_num * ctrl->pull_bank_stride;
 372                 reg += (pin_num / 16) * 4;
 373                 bit = pin_num % 16;
 374
 375                 return !(readl_relaxed(reg) & BIT(bit))
 376                                 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
 377                                 : PIN_CONFIG_BIAS_DISABLE;
 378         } else {
 379                 dev_err(info->dev, "pull support for rk31xx not implemented\n");
 380                 return -EIO;
 381         }
 382 }
 383
 384 static int rockchip_set_pull(struct rockchip_pin_bank *bank,
 385                                         int pin_num, int pull)
 386 {
 387         struct rockchip_pinctrl *info = bank->drvdata;
 388         struct rockchip_pin_ctrl *ctrl = info->ctrl;
 389         void __iomem *reg;
 390         unsigned long flags;
 391         u8 bit;
 392         u32 data;
 393
 394         dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
 395                  bank->bank_num, pin_num, pull);
 396
 397         /* rk3066b does support any pulls */
 398         if (!ctrl->pull_offset)
 399                 return pull ? -EINVAL : 0;
 400
 401         reg = info->reg_base + ctrl->pull_offset;
 402
 403         if (ctrl->pull_auto) {
 404                 if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
 405                                         pull != PIN_CONFIG_BIAS_DISABLE) {
 406                         dev_err(info->dev, "only PIN_DEFAULT and DISABLE allowed\n");
 407                         return -EINVAL;
 408                 }
 409
 410                 reg += bank->bank_num * ctrl->pull_bank_stride;
 411                 reg += (pin_num / 16) * 4;
 412                 bit = pin_num % 16;
 413
 414                 spin_lock_irqsave(&bank->slock, flags);
 415
 416                 data = BIT(bit + 16);
 417                 if (pull == PIN_CONFIG_BIAS_DISABLE)
 418                         data |= BIT(bit);
 419                 writel(data, reg);
 420
 421                 spin_unlock_irqrestore(&bank->slock, flags);
 422         } else {
 423                 if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT) {
 424                         dev_err(info->dev, "pull direction (up/down) needs to be specified\n");
 425                         return -EINVAL;
 426                 }
 427
 428                 dev_err(info->dev, "pull support for rk31xx not implemented\n");
 429                 return -EIO;
 430         }
 431
 432         return 0;
 433 }
 434
 435 /*
 436  * Pinmux_ops handling
 437  */
 438
 439 static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
 440 {
 441         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 442
 443         return info->nfunctions;
 444 }
 445
 446 static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
 447                                           unsigned selector)
 448 {
 449         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 450
 451         return info->functions[selector].name;
 452 }
 453
 454 static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
 455                                 unsigned selector, const char * const **groups,
 456                                 unsigned * const num_groups)
 457 {
 458         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 459
 460         *groups = info->functions[selector].groups;
 461         *num_groups = info->functions[selector].ngroups;
 462
 463         return 0;
 464 }
 465
 466 static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
 467                                                             unsigned group)
 468 {
 469         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 470         const unsigned int *pins = info->groups[group].pins;
 471         const struct rockchip_pin_config *data = info->groups[group].data;
 472         struct rockchip_pin_bank *bank;
 473         int cnt;
 474
 475         dev_dbg(info->dev, "enable function %s group %s\n",
 476                 info->functions[selector].name, info->groups[group].name);
 477
 478         /*
 479          * for each pin in the pin group selected, program the correspoding pin
 480          * pin function number in the config register.
 481          */
 482         for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
 483                 bank = pin_to_bank(info, pins[cnt]);
 484                 rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
 485                                  data[cnt].func);
 486         }
 487
 488         return 0;
 489 }
 490
 491 static void rockchip_pmx_disable(struct pinctrl_dev *pctldev,
 492                                         unsigned selector, unsigned group)
 493 {
 494         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 495         const unsigned int *pins = info->groups[group].pins;
 496         struct rockchip_pin_bank *bank;
 497         int cnt;
 498
 499         dev_dbg(info->dev, "disable function %s group %s\n",
 500                 info->functions[selector].name, info->groups[group].name);
 501
 502         for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
 503                 bank = pin_to_bank(info, pins[cnt]);
 504                 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
 505         }
 506 }
 507
 508 /*
 509  * The calls to gpio_direction_output() and gpio_direction_input()
 510  * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
 511  * function called from the gpiolib interface).
 512  */
 513 static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
 514                                               struct pinctrl_gpio_range *range,
 515                                               unsigned offset, bool input)
 516 {
 517         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 518         struct rockchip_pin_bank *bank;
 519         struct gpio_chip *chip;
 520         int pin;
 521         u32 data;
 522
 523         chip = range->gc;
 524         bank = gc_to_pin_bank(chip);
 525         pin = offset - chip->base;
 526
 527         dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
 528                  offset, range->name, pin, input ? "input" : "output");
 529
 530         rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
 531
 532         data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
 533         /* set bit to 1 for output, 0 for input */
 534         if (!input)
 535                 data |= BIT(pin);
 536         else
 537                 data &= ~BIT(pin);
 538         writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
 539
 540         return 0;
 541 }
 542
 543 static const struct pinmux_ops rockchip_pmx_ops = {
 544         .get_functions_count    = rockchip_pmx_get_funcs_count,
 545         .get_function_name      = rockchip_pmx_get_func_name,
 546         .get_function_groups    = rockchip_pmx_get_groups,
 547         .enable                 = rockchip_pmx_enable,
 548         .disable                = rockchip_pmx_disable,
 549         .gpio_set_direction     = rockchip_pmx_gpio_set_direction,
 550 };
 551
 552 /*
 553  * Pinconf_ops handling
 554  */
 555
 556 static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
 557                                         enum pin_config_param pull)
 558 {
 559         /* rk3066b does support any pulls */
 560         if (!ctrl->pull_offset)
 561                 return pull ? false : true;
 562
 563         if (ctrl->pull_auto) {
 564                 if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
 565                                         pull != PIN_CONFIG_BIAS_DISABLE)
 566                         return false;
 567         } else {
 568                 if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
 569                         return false;
 570         }
 571
 572         return true;
 573 }
 574
 575 /* set the pin config settings for a specified pin */
 576 static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 577                                 unsigned long *configs, unsigned num_configs)
 578 {
 579         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 580         struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
 581         enum pin_config_param param;
 582         u16 arg;
 583         int i;
 584         int rc;
 585
 586         for (i = 0; i < num_configs; i++) {
 587                 param = pinconf_to_config_param(configs[i]);
 588                 arg = pinconf_to_config_argument(configs[i]);
 589
 590                 switch (param) {
 591                 case PIN_CONFIG_BIAS_DISABLE:
 592                         rc =  rockchip_set_pull(bank, pin - bank->pin_base,
 593                                 param);
 594                         if (rc)
 595                                 return rc;
 596                         break;
 597                 case PIN_CONFIG_BIAS_PULL_UP:
 598                 case PIN_CONFIG_BIAS_PULL_DOWN:
 599                 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
 600                         if (!rockchip_pinconf_pull_valid(info->ctrl, param))
 601                                 return -ENOTSUPP;
 602
 603                         if (!arg)
 604                                 return -EINVAL;
 605
 606                         rc = rockchip_set_pull(bank, pin - bank->pin_base,
 607                                 param);
 608                         if (rc)
 609                                 return rc;
 610                         break;
 611                 default:
 612                         return -ENOTSUPP;
 613                         break;
 614                 }
 615         } /* for each config */
 616
 617         return 0;
 618 }
 619
 620 /* get the pin config settings for a specified pin */
 621 static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
 622                                                         unsigned long *config)
 623 {
 624         struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 625         struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
 626         enum pin_config_param param = pinconf_to_config_param(*config);
 627
 628         switch (param) {
 629         case PIN_CONFIG_BIAS_DISABLE:
 630                 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
 631                         return -EINVAL;
 632
 633                 *config = 0;
 634                 break;
 635         case PIN_CONFIG_BIAS_PULL_UP:
 636         case PIN_CONFIG_BIAS_PULL_DOWN:
 637         case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
 638                 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
 639                         return -ENOTSUPP;
 640
 641                 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
 642                         return -EINVAL;
 643
 644                 *config = 1;
 645                 break;
 646         default:
 647                 return -ENOTSUPP;
 648                 break;
 649         }
 650
 651         return 0;
 652 }
 653
 654 static const struct pinconf_ops rockchip_pinconf_ops = {
 655         .pin_config_get                 = rockchip_pinconf_get,
 656         .pin_config_set                 = rockchip_pinconf_set,
 657 };
 658
 659 static const char *gpio_compat = "rockchip,gpio-bank";
 660
 661 static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
 662                                                 struct device_node *np)
 663 {
 664         struct device_node *child;
 665
 666         for_each_child_of_node(np, child) {
 667                 if (of_device_is_compatible(child, gpio_compat))
 668                         continue;
 669
 670                 info->nfunctions++;
 671                 info->ngroups += of_get_child_count(child);
 672         }
 673 }
 674
 675 static int rockchip_pinctrl_parse_groups(struct device_node *np,
 676                                               struct rockchip_pin_group *grp,
 677                                               struct rockchip_pinctrl *info,
 678                                               u32 index)
 679 {
 680         struct rockchip_pin_bank *bank;
 681         int size;
 682         const __be32 *list;
 683         int num;
 684         int i, j;
 685         int ret;
 686
 687         dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
 688
 689         /* Initialise group */
 690         grp->name = np->name;
 691
 692         /*
 693          * the binding format is rockchip,pins = <bank pin mux CONFIG>,
 694          * do sanity check and calculate pins number
 695          */
 696         list = of_get_property(np, "rockchip,pins", &size);
 697         /* we do not check return since it's safe node passed down */
 698         size /= sizeof(*list);
 699         if (!size || size % 4) {
 700                 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
 701                 return -EINVAL;
 702         }
 703
 704         grp->npins = size / 4;
 705
 706         grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
 707                                                 GFP_KERNEL);
 708         grp->data = devm_kzalloc(info->dev, grp->npins *
 709                                           sizeof(struct rockchip_pin_config),
 710                                         GFP_KERNEL);
 711         if (!grp->pins || !grp->data)
 712                 return -ENOMEM;
 713
 714         for (i = 0, j = 0; i < size; i += 4, j++) {
 715                 const __be32 *phandle;
 716                 struct device_node *np_config;
 717
 718                 num = be32_to_cpu(*list++);
 719                 bank = bank_num_to_bank(info, num);
 720                 if (IS_ERR(bank))
 721                         return PTR_ERR(bank);
 722
 723                 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
 724                 grp->data[j].func = be32_to_cpu(*list++);
 725
 726                 phandle = list++;
 727                 if (!phandle)
 728                         return -EINVAL;
 729
 730                 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
 731                 ret = pinconf_generic_parse_dt_config(np_config,
 732                                 &grp->data[j].configs, &grp->data[j].nconfigs);
 733                 if (ret)
 734                         return ret;
 735         }
 736
 737         return 0;
 738 }
 739
 740 static int rockchip_pinctrl_parse_functions(struct device_node *np,
 741                                                 struct rockchip_pinctrl *info,
 742                                                 u32 index)
 743 {
 744         struct device_node *child;
 745         struct rockchip_pmx_func *func;
 746         struct rockchip_pin_group *grp;
 747         int ret;
 748         static u32 grp_index;
 749         u32 i = 0;
 750
 751         dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
 752
 753         func = &info->functions[index];
 754
 755         /* Initialise function */
 756         func->name = np->name;
 757         func->ngroups = of_get_child_count(np);
 758         if (func->ngroups <= 0)
 759                 return 0;
 760
 761         func->groups = devm_kzalloc(info->dev,
 762                         func->ngroups * sizeof(char *), GFP_KERNEL);
 763         if (!func->groups)
 764                 return -ENOMEM;
 765
 766         for_each_child_of_node(np, child) {
 767                 func->groups[i] = child->name;
 768                 grp = &info->groups[grp_index++];
 769                 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
 770                 if (ret)
 771                         return ret;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
 778                                               struct rockchip_pinctrl *info)
 779 {
 780         struct device *dev = &pdev->dev;
 781         struct device_node *np = dev->of_node;
 782         struct device_node *child;
 783         int ret;
 784         int i;
 785
 786         rockchip_pinctrl_child_count(info, np);
 787
 788         dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
 789         dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
 790
 791         info->functions = devm_kzalloc(dev, info->nfunctions *
 792                                               sizeof(struct rockchip_pmx_func),
 793                                               GFP_KERNEL);
 794         if (!info->functions) {
 795                 dev_err(dev, "failed to allocate memory for function list\n");
 796                 return -EINVAL;
 797         }
 798
 799         info->groups = devm_kzalloc(dev, info->ngroups *
 800                                             sizeof(struct rockchip_pin_group),
 801                                             GFP_KERNEL);
 802         if (!info->groups) {
 803                 dev_err(dev, "failed allocate memory for ping group list\n");
 804                 return -EINVAL;
 805         }
 806
 807         i = 0;
 808
 809         for_each_child_of_node(np, child) {
 810                 if (of_device_is_compatible(child, gpio_compat))
 811                         continue;
 812                 ret = rockchip_pinctrl_parse_functions(child, info, i++);
 813                 if (ret) {
 814                         dev_err(&pdev->dev, "failed to parse function\n");
 815                         return ret;
 816                 }
 817         }
 818
 819         return 0;
 820 }
 821
 822 static int rockchip_pinctrl_register(struct platform_device *pdev,
 823                                         struct rockchip_pinctrl *info)
 824 {
 825         struct pinctrl_desc *ctrldesc = &info->pctl;
 826         struct pinctrl_pin_desc *pindesc, *pdesc;
 827         struct rockchip_pin_bank *pin_bank;
 828         int pin, bank, ret;
 829         int k;
 830
 831         ctrldesc->name = "rockchip-pinctrl";
 832         ctrldesc->owner = THIS_MODULE;
 833         ctrldesc->pctlops = &rockchip_pctrl_ops;
 834         ctrldesc->pmxops = &rockchip_pmx_ops;
 835         ctrldesc->confops = &rockchip_pinconf_ops;
 836
 837         pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
 838                         info->ctrl->nr_pins, GFP_KERNEL);
 839         if (!pindesc) {
 840                 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
 841                 return -ENOMEM;
 842         }
 843         ctrldesc->pins = pindesc;
 844         ctrldesc->npins = info->ctrl->nr_pins;
 845
 846         pdesc = pindesc;
 847         for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
 848                 pin_bank = &info->ctrl->pin_banks[bank];
 849                 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
 850                         pdesc->number = k;
 851                         pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
 852                                                 pin_bank->name, pin);
 853                         pdesc++;
 854                 }
 855         }
 856
 857         info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
 858         if (!info->pctl_dev) {
 859                 dev_err(&pdev->dev, "could not register pinctrl driver\n");
 860                 return -EINVAL;
 861         }
 862
 863         for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
 864                 pin_bank = &info->ctrl->pin_banks[bank];
 865                 pin_bank->grange.name = pin_bank->name;
 866                 pin_bank->grange.id = bank;
 867                 pin_bank->grange.pin_base = pin_bank->pin_base;
 868                 pin_bank->grange.base = pin_bank->gpio_chip.base;
 869                 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
 870                 pin_bank->grange.gc = &pin_bank->gpio_chip;
 871                 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
 872         }
 873
 874         ret = rockchip_pinctrl_parse_dt(pdev, info);
 875         if (ret) {
 876                 pinctrl_unregister(info->pctl_dev);
 877                 return ret;
 878         }
 879
 880         return 0;
 881 }
 882
 883 /*
 884  * GPIO handling
 885  */
 886
 887 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
 888 {
 889         struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
 890         void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
 891         unsigned long flags;
 892         u32 data;
 893
 894         spin_lock_irqsave(&bank->slock, flags);
 895
 896         data = readl(reg);
 897         data &= ~BIT(offset);
 898         if (value)
 899                 data |= BIT(offset);
 900         writel(data, reg);
 901
 902         spin_unlock_irqrestore(&bank->slock, flags);
 903 }
 904
 905 /*
 906  * Returns the level of the pin for input direction and setting of the DR
 907  * register for output gpios.
 908  */
 909 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
 910 {
 911         struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
 912         u32 data;
 913
 914         data = readl(bank->reg_base + GPIO_EXT_PORT);
 915         data >>= offset;
 916         data &= 1;
 917         return data;
 918 }
 919
 920 /*
 921  * gpiolib gpio_direction_input callback function. The setting of the pin
 922  * mux function as 'gpio input' will be handled by the pinctrl susbsystem
 923  * interface.
 924  */
 925 static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
 926 {
 927         return pinctrl_gpio_direction_input(gc->base + offset);
 928 }
 929
 930 /*
 931  * gpiolib gpio_direction_output callback function. The setting of the pin
 932  * mux function as 'gpio output' will be handled by the pinctrl susbsystem
 933  * interface.
 934  */
 935 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
 936                                           unsigned offset, int value)
 937 {
 938         rockchip_gpio_set(gc, offset, value);
 939         return pinctrl_gpio_direction_output(gc->base + offset);
 940 }
 941
 942 /*
 943  * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
 944  * and a virtual IRQ, if not already present.
 945  */
 946 static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
 947 {
 948         struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
 949         unsigned int virq;
 950
 951         if (!bank->domain)
 952                 return -ENXIO;
 953
 954         virq = irq_create_mapping(bank->domain, offset);
 955
 956         return (virq) ? : -ENXIO;
 957 }
 958
 959 static const struct gpio_chip rockchip_gpiolib_chip = {
 960         .set = rockchip_gpio_set,
 961         .get = rockchip_gpio_get,
 962         .direction_input = rockchip_gpio_direction_input,
 963         .direction_output = rockchip_gpio_direction_output,
 964         .to_irq = rockchip_gpio_to_irq,
 965         .owner = THIS_MODULE,
 966 };
 967
 968 /*
 969  * Interrupt handling
 970  */
 971
 972 static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
 973 {
 974         struct irq_chip *chip = irq_get_chip(irq);
 975         struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
 976         u32 pend;
 977
 978         dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
 979
 980         chained_irq_enter(chip, desc);
 981
 982         pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
 983
 984         while (pend) {
 985                 unsigned int virq;
 986
 987                 irq = __ffs(pend);
 988                 pend &= ~BIT(irq);
 989                 virq = irq_linear_revmap(bank->domain, irq);
 990
 991                 if (!virq) {
 992                         dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
 993                         continue;
 994                 }
 995
 996                 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
 997
 998                 generic_handle_irq(virq);
 999         }
1000
1001         chained_irq_exit(chip, desc);
1002 }
1003
1004 static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1005 {
1006         struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1007         struct rockchip_pin_bank *bank = gc->private;
1008         u32 mask = BIT(d->hwirq);
1009         u32 polarity;
1010         u32 level;
1011         u32 data;
1012
1013         if (type & IRQ_TYPE_EDGE_BOTH)
1014                 __irq_set_handler_locked(d->irq, handle_edge_irq);
1015         else
1016                 __irq_set_handler_locked(d->irq, handle_level_irq);
1017
1018         irq_gc_lock(gc);
1019
1020         level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1021         polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1022
1023         switch (type) {
1024         case IRQ_TYPE_EDGE_RISING:
1025                 level |= mask;
1026                 polarity |= mask;
1027                 break;
1028         case IRQ_TYPE_EDGE_FALLING:
1029                 level |= mask;
1030                 polarity &= ~mask;
1031                 break;
1032         case IRQ_TYPE_LEVEL_HIGH:
1033                 level &= ~mask;
1034                 polarity |= mask;
1035                 break;
1036         case IRQ_TYPE_LEVEL_LOW:
1037                 level &= ~mask;
1038                 polarity &= ~mask;
1039                 break;
1040         default:
1041                 irq_gc_unlock(gc);
1042                 return -EINVAL;
1043         }
1044
1045         writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1046         writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1047
1048         irq_gc_unlock(gc);
1049
1050         /* make sure the pin is configured as gpio input */
1051         rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1052         data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1053         data &= ~mask;
1054         writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1055
1056         return 0;
1057 }
1058
1059 static int rockchip_interrupts_register(struct platform_device *pdev,
1060                                                 struct rockchip_pinctrl *info)
1061 {
1062         struct rockchip_pin_ctrl *ctrl = info->ctrl;
1063         struct rockchip_pin_bank *bank = ctrl->pin_banks;
1064         unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1065         struct irq_chip_generic *gc;
1066         int ret;
1067         int i;
1068
1069         for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1070                 if (!bank->valid) {
1071                         dev_warn(&pdev->dev, "bank %s is not valid\n",
1072                                  bank->name);
1073                         continue;
1074                 }
1075
1076                 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1077                                                 &irq_generic_chip_ops, NULL);
1078                 if (!bank->domain) {
1079                         dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1080                                  bank->name);
1081                         continue;
1082                 }
1083
1084                 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1085                                          "rockchip_gpio_irq", handle_level_irq,
1086                                          clr, 0, IRQ_GC_INIT_MASK_CACHE);
1087                 if (ret) {
1088                         dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1089                                 bank->name);
1090                         irq_domain_remove(bank->domain);
1091                         continue;
1092                 }
1093
1094                 gc = irq_get_domain_generic_chip(bank->domain, 0);
1095                 gc->reg_base = bank->reg_base;
1096                 gc->private = bank;
1097                 gc->chip_types[0].regs.mask = GPIO_INTEN;
1098                 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1099                 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1100                 gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
1101                 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
1102                 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1103                 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1104
1105                 irq_set_handler_data(bank->irq, bank);
1106                 irq_set_chained_handler(bank->irq, rockchip_irq_demux);
1107         }
1108
1109         return 0;
1110 }
1111
1112 static int rockchip_gpiolib_register(struct platform_device *pdev,
1113                                                 struct rockchip_pinctrl *info)
1114 {
1115         struct rockchip_pin_ctrl *ctrl = info->ctrl;
1116         struct rockchip_pin_bank *bank = ctrl->pin_banks;
1117         struct gpio_chip *gc;
1118         int ret;
1119         int i;
1120
1121         for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1122                 if (!bank->valid) {
1123                         dev_warn(&pdev->dev, "bank %s is not valid\n",
1124                                  bank->name);
1125                         continue;
1126                 }
1127
1128                 bank->gpio_chip = rockchip_gpiolib_chip;
1129
1130                 gc = &bank->gpio_chip;
1131                 gc->base = bank->pin_base;
1132                 gc->ngpio = bank->nr_pins;
1133                 gc->dev = &pdev->dev;
1134                 gc->of_node = bank->of_node;
1135                 gc->label = bank->name;
1136
1137                 ret = gpiochip_add(gc);
1138                 if (ret) {
1139                         dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1140                                                         gc->label, ret);
1141                         goto fail;
1142                 }
1143         }
1144
1145         rockchip_interrupts_register(pdev, info);
1146
1147         return 0;
1148
1149 fail:
1150         for (--i, --bank; i >= 0; --i, --bank) {
1151                 if (!bank->valid)
1152                         continue;
1153
1154                 if (gpiochip_remove(&bank->gpio_chip))
1155                         dev_err(&pdev->dev, "gpio chip %s remove failed\n",
1156                                                         bank->gpio_chip.label);
1157         }
1158         return ret;
1159 }
1160
1161 static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1162                                                 struct rockchip_pinctrl *info)
1163 {
1164         struct rockchip_pin_ctrl *ctrl = info->ctrl;
1165         struct rockchip_pin_bank *bank = ctrl->pin_banks;
1166         int ret = 0;
1167         int i;
1168
1169         for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) {
1170                 if (!bank->valid)
1171                         continue;
1172
1173                 ret = gpiochip_remove(&bank->gpio_chip);
1174         }
1175
1176         if (ret)
1177                 dev_err(&pdev->dev, "gpio chip remove failed\n");
1178
1179         return ret;
1180 }
1181
1182 static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1183                                   struct device *dev)
1184 {
1185         struct resource res;
1186
1187         if (of_address_to_resource(bank->of_node, 0, &res)) {
1188                 dev_err(dev, "cannot find IO resource for bank\n");
1189                 return -ENOENT;
1190         }
1191
1192         bank->reg_base = devm_ioremap_resource(dev, &res);
1193         if (IS_ERR(bank->reg_base))
1194                 return PTR_ERR(bank->reg_base);
1195
1196         bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1197
1198         bank->clk = of_clk_get(bank->of_node, 0);
1199         if (IS_ERR(bank->clk))
1200                 return PTR_ERR(bank->clk);
1201
1202         return clk_prepare_enable(bank->clk);
1203 }
1204
1205 static const struct of_device_id rockchip_pinctrl_dt_match[];
1206
1207 /* retrieve the soc specific data */
1208 static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1209                                                 struct rockchip_pinctrl *d,
1210                                                 struct platform_device *pdev)
1211 {
1212         const struct of_device_id *match;
1213         struct device_node *node = pdev->dev.of_node;
1214         struct device_node *np;
1215         struct rockchip_pin_ctrl *ctrl;
1216         struct rockchip_pin_bank *bank;
1217         int i;
1218
1219         match = of_match_node(rockchip_pinctrl_dt_match, node);
1220         ctrl = (struct rockchip_pin_ctrl *)match->data;
1221
1222         for_each_child_of_node(node, np) {
1223                 if (!of_find_property(np, "gpio-controller", NULL))
1224                         continue;
1225
1226                 bank = ctrl->pin_banks;
1227                 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1228                         if (!strcmp(bank->name, np->name)) {
1229                                 bank->of_node = np;
1230
1231                                 if (!rockchip_get_bank_data(bank, &pdev->dev))
1232                                         bank->valid = true;
1233
1234                                 break;
1235                         }
1236                 }
1237         }
1238
1239         bank = ctrl->pin_banks;
1240         for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1241                 spin_lock_init(&bank->slock);
1242                 bank->drvdata = d;
1243                 bank->pin_base = ctrl->nr_pins;
1244                 ctrl->nr_pins += bank->nr_pins;
1245         }
1246
1247         return ctrl;
1248 }
1249
1250 static int rockchip_pinctrl_probe(struct platform_device *pdev)
1251 {
1252         struct rockchip_pinctrl *info;
1253         struct device *dev = &pdev->dev;
1254         struct rockchip_pin_ctrl *ctrl;
1255         struct resource *res;
1256         int ret;
1257
1258         if (!dev->of_node) {
1259                 dev_err(dev, "device tree node not found\n");
1260                 return -ENODEV;
1261         }
1262
1263         info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1264         if (!info)
1265                 return -ENOMEM;
1266
1267         ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
1268         if (!ctrl) {
1269                 dev_err(dev, "driver data not available\n");
1270                 return -EINVAL;
1271         }
1272         info->ctrl = ctrl;
1273         info->dev = dev;
1274
1275         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1276         info->reg_base = devm_ioremap_resource(&pdev->dev, res);
1277         if (IS_ERR(info->reg_base))
1278                 return PTR_ERR(info->reg_base);
1279
1280         ret = rockchip_gpiolib_register(pdev, info);
1281         if (ret)
1282                 return ret;
1283
1284         ret = rockchip_pinctrl_register(pdev, info);
1285         if (ret) {
1286                 rockchip_gpiolib_unregister(pdev, info);
1287                 return ret;
1288         }
1289
1290         platform_set_drvdata(pdev, info);
1291
1292         return 0;
1293 }
1294
1295 static struct rockchip_pin_bank rk2928_pin_banks[] = {
1296         PIN_BANK(0, 32, "gpio0"),
1297         PIN_BANK(1, 32, "gpio1"),
1298         PIN_BANK(2, 32, "gpio2"),
1299         PIN_BANK(3, 32, "gpio3"),
1300 };
1301
1302 static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
1303                 .pin_banks              = rk2928_pin_banks,
1304                 .nr_banks               = ARRAY_SIZE(rk2928_pin_banks),
1305                 .label                  = "RK2928-GPIO",
1306                 .mux_offset             = 0xa8,
1307                 .pull_offset            = 0x118,
1308                 .pull_auto              = 1,
1309                 .pull_bank_stride       = 8,
1310 };
1311
1312 static struct rockchip_pin_bank rk3066a_pin_banks[] = {
1313         PIN_BANK(0, 32, "gpio0"),
1314         PIN_BANK(1, 32, "gpio1"),
1315         PIN_BANK(2, 32, "gpio2"),
1316         PIN_BANK(3, 32, "gpio3"),
1317         PIN_BANK(4, 32, "gpio4"),
1318         PIN_BANK(6, 16, "gpio6"),
1319 };
1320
1321 static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
1322                 .pin_banks              = rk3066a_pin_banks,
1323                 .nr_banks               = ARRAY_SIZE(rk3066a_pin_banks),
1324                 .label                  = "RK3066a-GPIO",
1325                 .mux_offset             = 0xa8,
1326                 .pull_offset            = 0x118,
1327                 .pull_auto              = 1,
1328                 .pull_bank_stride       = 8,
1329 };
1330
1331 static struct rockchip_pin_bank rk3066b_pin_banks[] = {
1332         PIN_BANK(0, 32, "gpio0"),
1333         PIN_BANK(1, 32, "gpio1"),
1334         PIN_BANK(2, 32, "gpio2"),
1335         PIN_BANK(3, 32, "gpio3"),
1336 };
1337
1338 static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
1339                 .pin_banks      = rk3066b_pin_banks,
1340                 .nr_banks       = ARRAY_SIZE(rk3066b_pin_banks),
1341                 .label          = "RK3066b-GPIO",
1342                 .mux_offset     = 0x60,
1343                 .pull_offset    = -EINVAL,
1344 };
1345
1346 static struct rockchip_pin_bank rk3188_pin_banks[] = {
1347         PIN_BANK(0, 32, "gpio0"),
1348         PIN_BANK(1, 32, "gpio1"),
1349         PIN_BANK(2, 32, "gpio2"),
1350         PIN_BANK(3, 32, "gpio3"),
1351 };
1352
1353 static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
1354                 .pin_banks              = rk3188_pin_banks,
1355                 .nr_banks               = ARRAY_SIZE(rk3188_pin_banks),
1356                 .label                  = "RK3188-GPIO",
1357                 .mux_offset             = 0x68,
1358                 .pull_offset            = 0x164,
1359                 .pull_bank_stride       = 16,
1360 };
1361
1362 static const struct of_device_id rockchip_pinctrl_dt_match[] = {
1363         { .compatible = "rockchip,rk2928-pinctrl",
1364                 .data = (void *)&rk2928_pin_ctrl },
1365         { .compatible = "rockchip,rk3066a-pinctrl",
1366                 .data = (void *)&rk3066a_pin_ctrl },
1367         { .compatible = "rockchip,rk3066b-pinctrl",
1368                 .data = (void *)&rk3066b_pin_ctrl },
1369         { .compatible = "rockchip,rk3188-pinctrl",
1370                 .data = (void *)&rk3188_pin_ctrl },
1371         {},
1372 };
1373 MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
1374
1375 static struct platform_driver rockchip_pinctrl_driver = {
1376         .probe          = rockchip_pinctrl_probe,
1377         .driver = {
1378                 .name   = "rockchip-pinctrl",
1379                 .owner  = THIS_MODULE,
1380                 .of_match_table = rockchip_pinctrl_dt_match,
1381         },
1382 };
1383
1384 static int __init rockchip_pinctrl_drv_register(void)
1385 {
1386         return platform_driver_register(&rockchip_pinctrl_driver);
1387 }
1388 postcore_initcall(rockchip_pinctrl_drv_register);
1389
1390 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
1391 MODULE_DESCRIPTION("Rockchip pinctrl driver");
1392 MODULE_LICENSE("GPL v2");