drivers/pinctrl/pinctrl-single.c

   1 /*
   2  * Generic device tree based pinctrl driver for one register per pin
   3  * type pinmux controllers
   4  *
   5  * Copyright (C) 2012 Texas Instruments, Inc.
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2. This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/module.h>
  14 #include <linux/io.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/slab.h>
  17 #include <linux/err.h>
  18 #include <linux/list.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/irqchip/chained_irq.h>
  21 #include <linux/of.h>
  22 #include <linux/of_irq.h>
  23 #include <linux/seq_file.h>
  24
  25 #include <linux/pinctrl/pinconf-generic.h>
  26 #include <linux/pinctrl/pinconf.h>
  27 #include <linux/pinctrl/pinctrl.h>
  28 #include <linux/pinctrl/pinmux.h>
  29
  30 #include <linux/platform_data/pinctrl-single.h>
  31
  32 #include "core.h"
  33 #include "devicetree.h"
  34 #include "pinconf.h"
  35 #include "pinmux.h"
  36
  37 #define DRIVER_NAME                     "pinctrl-single"
  38 #define PCS_OFF_DISABLED                ~0U
  39
  40 /**
  41  * struct pcs_func_vals - mux function register offset and value pair
  42  * @reg:        register virtual address
  43  * @val:        register value
  44  * @mask:       mask
  45  */
  46 struct pcs_func_vals {
  47         void __iomem *reg;
  48         unsigned val;
  49         unsigned mask;
  50 };
  51
  52 /**
  53  * struct pcs_conf_vals - pinconf parameter, pinconf register offset
  54  * and value, enable, disable, mask
  55  * @param:      config parameter
  56  * @val:        user input bits in the pinconf register
  57  * @enable:     enable bits in the pinconf register
  58  * @disable:    disable bits in the pinconf register
  59  * @mask:       mask bits in the register value
  60  */
  61 struct pcs_conf_vals {
  62         enum pin_config_param param;
  63         unsigned val;
  64         unsigned enable;
  65         unsigned disable;
  66         unsigned mask;
  67 };
  68
  69 /**
  70  * struct pcs_conf_type - pinconf property name, pinconf param pair
  71  * @name:       property name in DTS file
  72  * @param:      config parameter
  73  */
  74 struct pcs_conf_type {
  75         const char *name;
  76         enum pin_config_param param;
  77 };
  78
  79 /**
  80  * struct pcs_function - pinctrl function
  81  * @name:       pinctrl function name
  82  * @vals:       register and vals array
  83  * @nvals:      number of entries in vals array
  84  * @pgnames:    array of pingroup names the function uses
  85  * @npgnames:   number of pingroup names the function uses
  86  * @conf:       array of pin configurations
  87  * @nconfs:     number of pin configurations available
  88  * @node:       list node
  89  */
  90 struct pcs_function {
  91         const char *name;
  92         struct pcs_func_vals *vals;
  93         unsigned nvals;
  94         const char **pgnames;
  95         int npgnames;
  96         struct pcs_conf_vals *conf;
  97         int nconfs;
  98         struct list_head node;
  99 };
 100
 101 /**
 102  * struct pcs_gpiofunc_range - pin ranges with same mux value of gpio function
 103  * @offset:     offset base of pins
 104  * @npins:      number pins with the same mux value of gpio function
 105  * @gpiofunc:   mux value of gpio function
 106  * @node:       list node
 107  */
 108 struct pcs_gpiofunc_range {
 109         unsigned offset;
 110         unsigned npins;
 111         unsigned gpiofunc;
 112         struct list_head node;
 113 };
 114
 115 /**
 116  * struct pcs_data - wrapper for data needed by pinctrl framework
 117  * @pa:         pindesc array
 118  * @cur:        index to current element
 119  *
 120  * REVISIT: We should be able to drop this eventually by adding
 121  * support for registering pins individually in the pinctrl
 122  * framework for those drivers that don't need a static array.
 123  */
 124 struct pcs_data {
 125         struct pinctrl_pin_desc *pa;
 126         int cur;
 127 };
 128
 129 /**
 130  * struct pcs_soc_data - SoC specific settings
 131  * @flags:      initial SoC specific PCS_FEAT_xxx values
 132  * @irq:        optional interrupt for the controller
 133  * @irq_enable_mask:    optional SoC specific interrupt enable mask
 134  * @irq_status_mask:    optional SoC specific interrupt status mask
 135  * @rearm:      optional SoC specific wake-up rearm function
 136  */
 137 struct pcs_soc_data {
 138         unsigned flags;
 139         int irq;
 140         unsigned irq_enable_mask;
 141         unsigned irq_status_mask;
 142         void (*rearm)(void);
 143 };
 144
 145 /**
 146  * struct pcs_device - pinctrl device instance
 147  * @res:        resources
 148  * @base:       virtual address of the controller
 149  * @saved_vals: saved values for the controller
 150  * @size:       size of the ioremapped area
 151  * @dev:        device entry
 152  * @np:         device tree node
 153  * @pctl:       pin controller device
 154  * @flags:      mask of PCS_FEAT_xxx values
 155  * @missing_nr_pinctrl_cells: for legacy binding, may go away
 156  * @socdata:    soc specific data
 157  * @lock:       spinlock for register access
 158  * @mutex:      mutex protecting the lists
 159  * @width:      bits per mux register
 160  * @fmask:      function register mask
 161  * @fshift:     function register shift
 162  * @foff:       value to turn mux off
 163  * @fmax:       max number of functions in fmask
 164  * @bits_per_mux: number of bits per mux
 165  * @bits_per_pin: number of bits per pin
 166  * @pins:       physical pins on the SoC
 167  * @gpiofuncs:  list of gpio functions
 168  * @irqs:       list of interrupt registers
 169  * @chip:       chip container for this instance
 170  * @domain:     IRQ domain for this instance
 171  * @desc:       pin controller descriptor
 172  * @read:       register read function to use
 173  * @write:      register write function to use
 174  */
 175 struct pcs_device {
 176         struct resource *res;
 177         void __iomem *base;
 178         void *saved_vals;
 179         unsigned size;
 180         struct device *dev;
 181         struct device_node *np;
 182         struct pinctrl_dev *pctl;
 183         unsigned flags;
 184 #define PCS_CONTEXT_LOSS_OFF    (1 << 3)
 185 #define PCS_QUIRK_SHARED_IRQ    (1 << 2)
 186 #define PCS_FEAT_IRQ            (1 << 1)
 187 #define PCS_FEAT_PINCONF        (1 << 0)
 188         struct property *missing_nr_pinctrl_cells;
 189         struct pcs_soc_data socdata;
 190         raw_spinlock_t lock;
 191         struct mutex mutex;
 192         unsigned width;
 193         unsigned fmask;
 194         unsigned fshift;
 195         unsigned foff;
 196         unsigned fmax;
 197         bool bits_per_mux;
 198         unsigned bits_per_pin;
 199         struct pcs_data pins;
 200         struct list_head gpiofuncs;
 201         struct list_head irqs;
 202         struct irq_chip chip;
 203         struct irq_domain *domain;
 204         struct pinctrl_desc desc;
 205         unsigned (*read)(void __iomem *reg);
 206         void (*write)(unsigned val, void __iomem *reg);
 207 };
 208
 209 #define PCS_QUIRK_HAS_SHARED_IRQ        (pcs->flags & PCS_QUIRK_SHARED_IRQ)
 210 #define PCS_HAS_IRQ             (pcs->flags & PCS_FEAT_IRQ)
 211 #define PCS_HAS_PINCONF         (pcs->flags & PCS_FEAT_PINCONF)
 212
 213 static int pcs_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
 214                            unsigned long *config);
 215 static int pcs_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin,
 216                            unsigned long *configs, unsigned num_configs);
 217
 218 static enum pin_config_param pcs_bias[] = {
 219         PIN_CONFIG_BIAS_PULL_DOWN,
 220         PIN_CONFIG_BIAS_PULL_UP,
 221 };
 222
 223 /*
 224  * This lock class tells lockdep that irqchip core that this single
 225  * pinctrl can be in a different category than its parents, so it won't
 226  * report false recursion.
 227  */
 228 static struct lock_class_key pcs_lock_class;
 229
 230 /* Class for the IRQ request mutex */
 231 static struct lock_class_key pcs_request_class;
 232
 233 /*
 234  * REVISIT: Reads and writes could eventually use regmap or something
 235  * generic. But at least on omaps, some mux registers are performance
 236  * critical as they may need to be remuxed every time before and after
 237  * idle. Adding tests for register access width for every read and
 238  * write like regmap is doing is not desired, and caching the registers
 239  * does not help in this case.
 240  */
 241
 242 static unsigned int pcs_readb(void __iomem *reg)
 243 {
 244         return readb(reg);
 245 }
 246
 247 static unsigned int pcs_readw(void __iomem *reg)
 248 {
 249         return readw(reg);
 250 }
 251
 252 static unsigned int pcs_readl(void __iomem *reg)
 253 {
 254         return readl(reg);
 255 }
 256
 257 static void pcs_writeb(unsigned int val, void __iomem *reg)
 258 {
 259         writeb(val, reg);
 260 }
 261
 262 static void pcs_writew(unsigned int val, void __iomem *reg)
 263 {
 264         writew(val, reg);
 265 }
 266
 267 static void pcs_writel(unsigned int val, void __iomem *reg)
 268 {
 269         writel(val, reg);
 270 }
 271
 272 static unsigned int pcs_pin_reg_offset_get(struct pcs_device *pcs,
 273                                            unsigned int pin)
 274 {
 275         unsigned int mux_bytes = pcs->width / BITS_PER_BYTE;
 276
 277         if (pcs->bits_per_mux) {
 278                 unsigned int pin_offset_bytes;
 279
 280                 pin_offset_bytes = (pcs->bits_per_pin * pin) / BITS_PER_BYTE;
 281                 return (pin_offset_bytes / mux_bytes) * mux_bytes;
 282         }
 283
 284         return pin * mux_bytes;
 285 }
 286
 287 static unsigned int pcs_pin_shift_reg_get(struct pcs_device *pcs,
 288                                           unsigned int pin)
 289 {
 290         return (pin % (pcs->width / pcs->bits_per_pin)) * pcs->bits_per_pin;
 291 }
 292
 293 static void pcs_pin_dbg_show(struct pinctrl_dev *pctldev,
 294                                         struct seq_file *s,
 295                                         unsigned pin)
 296 {
 297         struct pcs_device *pcs;
 298         unsigned int val;
 299         unsigned long offset;
 300         size_t pa;
 301
 302         pcs = pinctrl_dev_get_drvdata(pctldev);
 303
 304         offset = pcs_pin_reg_offset_get(pcs, pin);
 305         val = pcs->read(pcs->base + offset);
 306
 307         if (pcs->bits_per_mux)
 308                 val &= pcs->fmask << pcs_pin_shift_reg_get(pcs, pin);
 309
 310         pa = pcs->res->start + offset;
 311
 312         seq_printf(s, "%zx %08x %s ", pa, val, DRIVER_NAME);
 313 }
 314
 315 static void pcs_dt_free_map(struct pinctrl_dev *pctldev,
 316                                 struct pinctrl_map *map, unsigned num_maps)
 317 {
 318         struct pcs_device *pcs;
 319
 320         pcs = pinctrl_dev_get_drvdata(pctldev);
 321         devm_kfree(pcs->dev, map);
 322 }
 323
 324 static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev,
 325                                 struct device_node *np_config,
 326                                 struct pinctrl_map **map, unsigned *num_maps);
 327
 328 static const struct pinctrl_ops pcs_pinctrl_ops = {
 329         .get_groups_count = pinctrl_generic_get_group_count,
 330         .get_group_name = pinctrl_generic_get_group_name,
 331         .get_group_pins = pinctrl_generic_get_group_pins,
 332         .pin_dbg_show = pcs_pin_dbg_show,
 333         .dt_node_to_map = pcs_dt_node_to_map,
 334         .dt_free_map = pcs_dt_free_map,
 335 };
 336
 337 static int pcs_get_function(struct pinctrl_dev *pctldev, unsigned pin,
 338                             struct pcs_function **func)
 339 {
 340         struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev);
 341         struct pin_desc *pdesc = pin_desc_get(pctldev, pin);
 342         const struct pinctrl_setting_mux *setting;
 343         struct function_desc *function;
 344         unsigned fselector;
 345
 346         /* If pin is not described in DTS & enabled, mux_setting is NULL. */
 347         setting = pdesc->mux_setting;
 348         if (!setting)
 349                 return -ENOTSUPP;
 350         fselector = setting->func;
 351         function = pinmux_generic_get_function(pctldev, fselector);
 352         *func = function->data;
 353         if (!(*func)) {
 354                 dev_err(pcs->dev, "%s could not find function%i\n",
 355                         __func__, fselector);
 356                 return -ENOTSUPP;
 357         }
 358         return 0;
 359 }
 360
 361 static int pcs_set_mux(struct pinctrl_dev *pctldev, unsigned fselector,
 362         unsigned group)
 363 {
 364         struct pcs_device *pcs;
 365         struct function_desc *function;
 366         struct pcs_function *func;
 367         int i;
 368
 369         pcs = pinctrl_dev_get_drvdata(pctldev);
 370         /* If function mask is null, needn't enable it. */
 371         if (!pcs->fmask)
 372                 return 0;
 373         function = pinmux_generic_get_function(pctldev, fselector);
 374         if (!function)
 375                 return -EINVAL;
 376         func = function->data;
 377         if (!func)
 378                 return -EINVAL;
 379
 380         dev_dbg(pcs->dev, "enabling %s function%i\n",
 381                 func->name, fselector);
 382
 383         for (i = 0; i < func->nvals; i++) {
 384                 struct pcs_func_vals *vals;
 385                 unsigned long flags;
 386                 unsigned val, mask;
 387
 388                 vals = &func->vals[i];
 389                 raw_spin_lock_irqsave(&pcs->lock, flags);
 390                 val = pcs->read(vals->reg);
 391
 392                 if (pcs->bits_per_mux)
 393                         mask = vals->mask;
 394                 else
 395                         mask = pcs->fmask;
 396
 397                 val &= ~mask;
 398                 val |= (vals->val & mask);
 399                 pcs->write(val, vals->reg);
 400                 raw_spin_unlock_irqrestore(&pcs->lock, flags);
 401         }
 402
 403         return 0;
 404 }
 405
 406 static int pcs_request_gpio(struct pinctrl_dev *pctldev,
 407                             struct pinctrl_gpio_range *range, unsigned pin)
 408 {
 409         struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev);
 410         struct pcs_gpiofunc_range *frange = NULL;
 411         struct list_head *pos, *tmp;
 412         unsigned data;
 413
 414         /* If function mask is null, return directly. */
 415         if (!pcs->fmask)
 416                 return -ENOTSUPP;
 417
 418         list_for_each_safe(pos, tmp, &pcs->gpiofuncs) {
 419                 u32 offset;
 420
 421                 frange = list_entry(pos, struct pcs_gpiofunc_range, node);
 422                 if (pin >= frange->offset + frange->npins
 423                         || pin < frange->offset)
 424                         continue;
 425
 426                 offset = pcs_pin_reg_offset_get(pcs, pin);
 427
 428                 if (pcs->bits_per_mux) {
 429                         int pin_shift = pcs_pin_shift_reg_get(pcs, pin);
 430
 431                         data = pcs->read(pcs->base + offset);
 432                         data &= ~(pcs->fmask << pin_shift);
 433                         data |= frange->gpiofunc << pin_shift;
 434                         pcs->write(data, pcs->base + offset);
 435                 } else {
 436                         data = pcs->read(pcs->base + offset);
 437                         data &= ~pcs->fmask;
 438                         data |= frange->gpiofunc;
 439                         pcs->write(data, pcs->base + offset);
 440                 }
 441                 break;
 442         }
 443         return 0;
 444 }
 445
 446 static const struct pinmux_ops pcs_pinmux_ops = {
 447         .get_functions_count = pinmux_generic_get_function_count,
 448         .get_function_name = pinmux_generic_get_function_name,
 449         .get_function_groups = pinmux_generic_get_function_groups,
 450         .set_mux = pcs_set_mux,
 451         .gpio_request_enable = pcs_request_gpio,
 452 };
 453
 454 /* Clear BIAS value */
 455 static void pcs_pinconf_clear_bias(struct pinctrl_dev *pctldev, unsigned pin)
 456 {
 457         unsigned long config;
 458         int i;
 459         for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) {
 460                 config = pinconf_to_config_packed(pcs_bias[i], 0);
 461                 pcs_pinconf_set(pctldev, pin, &config, 1);
 462         }
 463 }
 464
 465 /*
 466  * Check whether PIN_CONFIG_BIAS_DISABLE is valid.
 467  * It's depend on that PULL_DOWN & PULL_UP configs are all invalid.
 468  */
 469 static bool pcs_pinconf_bias_disable(struct pinctrl_dev *pctldev, unsigned pin)
 470 {
 471         unsigned long config;
 472         int i;
 473
 474         for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) {
 475                 config = pinconf_to_config_packed(pcs_bias[i], 0);
 476                 if (!pcs_pinconf_get(pctldev, pin, &config))
 477                         goto out;
 478         }
 479         return true;
 480 out:
 481         return false;
 482 }
 483
 484 static int pcs_pinconf_get(struct pinctrl_dev *pctldev,
 485                                 unsigned pin, unsigned long *config)
 486 {
 487         struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev);
 488         struct pcs_function *func;
 489         enum pin_config_param param;
 490         unsigned offset = 0, data = 0, i, j, ret;
 491
 492         ret = pcs_get_function(pctldev, pin, &func);
 493         if (ret)
 494                 return ret;
 495
 496         for (i = 0; i < func->nconfs; i++) {
 497                 param = pinconf_to_config_param(*config);
 498                 if (param == PIN_CONFIG_BIAS_DISABLE) {
 499                         if (pcs_pinconf_bias_disable(pctldev, pin)) {
 500                                 *config = 0;
 501                                 return 0;
 502                         } else {
 503                                 return -ENOTSUPP;
 504                         }
 505                 } else if (param != func->conf[i].param) {
 506                         continue;
 507                 }
 508
 509                 offset = pin * (pcs->width / BITS_PER_BYTE);
 510                 data = pcs->read(pcs->base + offset) & func->conf[i].mask;
 511                 switch (func->conf[i].param) {
 512                 /* 4 parameters */
 513                 case PIN_CONFIG_BIAS_PULL_DOWN:
 514                 case PIN_CONFIG_BIAS_PULL_UP:
 515                 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 516                         if ((data != func->conf[i].enable) ||
 517                             (data == func->conf[i].disable))
 518                                 return -ENOTSUPP;
 519                         *config = 0;
 520                         break;
 521                 /* 2 parameters */
 522                 case PIN_CONFIG_INPUT_SCHMITT:
 523                         for (j = 0; j < func->nconfs; j++) {
 524                                 switch (func->conf[j].param) {
 525                                 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 526                                         if (data != func->conf[j].enable)
 527                                                 return -ENOTSUPP;
 528                                         break;
 529                                 default:
 530                                         break;
 531                                 }
 532                         }
 533                         *config = data;
 534                         break;
 535                 case PIN_CONFIG_DRIVE_STRENGTH:
 536                 case PIN_CONFIG_SLEW_RATE:
 537                 case PIN_CONFIG_MODE_LOW_POWER:
 538                 case PIN_CONFIG_INPUT_ENABLE:
 539                 default:
 540                         *config = data;
 541                         break;
 542                 }
 543                 return 0;
 544         }
 545         return -ENOTSUPP;
 546 }
 547
 548 static int pcs_pinconf_set(struct pinctrl_dev *pctldev,
 549                                 unsigned pin, unsigned long *configs,
 550                                 unsigned num_configs)
 551 {
 552         struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev);
 553         struct pcs_function *func;
 554         unsigned offset = 0, shift = 0, i, data, ret;
 555         u32 arg;
 556         int j;
 557
 558         ret = pcs_get_function(pctldev, pin, &func);
 559         if (ret)
 560                 return ret;
 561
 562         for (j = 0; j < num_configs; j++) {
 563                 for (i = 0; i < func->nconfs; i++) {
 564                         if (pinconf_to_config_param(configs[j])
 565                                 != func->conf[i].param)
 566                                 continue;
 567
 568                         offset = pin * (pcs->width / BITS_PER_BYTE);
 569                         data = pcs->read(pcs->base + offset);
 570                         arg = pinconf_to_config_argument(configs[j]);
 571                         switch (func->conf[i].param) {
 572                         /* 2 parameters */
 573                         case PIN_CONFIG_INPUT_SCHMITT:
 574                         case PIN_CONFIG_DRIVE_STRENGTH:
 575                         case PIN_CONFIG_SLEW_RATE:
 576                         case PIN_CONFIG_MODE_LOW_POWER:
 577                         case PIN_CONFIG_INPUT_ENABLE:
 578                                 shift = ffs(func->conf[i].mask) - 1;
 579                                 data &= ~func->conf[i].mask;
 580                                 data |= (arg << shift) & func->conf[i].mask;
 581                                 break;
 582                         /* 4 parameters */
 583                         case PIN_CONFIG_BIAS_DISABLE:
 584                                 pcs_pinconf_clear_bias(pctldev, pin);
 585                                 break;
 586                         case PIN_CONFIG_BIAS_PULL_DOWN:
 587                         case PIN_CONFIG_BIAS_PULL_UP:
 588                                 if (arg)
 589                                         pcs_pinconf_clear_bias(pctldev, pin);
 590                                 fallthrough;
 591                         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 592                                 data &= ~func->conf[i].mask;
 593                                 if (arg)
 594                                         data |= func->conf[i].enable;
 595                                 else
 596                                         data |= func->conf[i].disable;
 597                                 break;
 598                         default:
 599                                 return -ENOTSUPP;
 600                         }
 601                         pcs->write(data, pcs->base + offset);
 602
 603                         break;
 604                 }
 605                 if (i >= func->nconfs)
 606                         return -ENOTSUPP;
 607         } /* for each config */
 608
 609         return 0;
 610 }
 611
 612 static int pcs_pinconf_group_get(struct pinctrl_dev *pctldev,
 613                                 unsigned group, unsigned long *config)
 614 {
 615         const unsigned *pins;
 616         unsigned npins, old = 0;
 617         int i, ret;
 618
 619         ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
 620         if (ret)
 621                 return ret;
 622         for (i = 0; i < npins; i++) {
 623                 if (pcs_pinconf_get(pctldev, pins[i], config))
 624                         return -ENOTSUPP;
 625                 /* configs do not match between two pins */
 626                 if (i && (old != *config))
 627                         return -ENOTSUPP;
 628                 old = *config;
 629         }
 630         return 0;
 631 }
 632
 633 static int pcs_pinconf_group_set(struct pinctrl_dev *pctldev,
 634                                 unsigned group, unsigned long *configs,
 635                                 unsigned num_configs)
 636 {
 637         const unsigned *pins;
 638         unsigned npins;
 639         int i, ret;
 640
 641         ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
 642         if (ret)
 643                 return ret;
 644         for (i = 0; i < npins; i++) {
 645                 if (pcs_pinconf_set(pctldev, pins[i], configs, num_configs))
 646                         return -ENOTSUPP;
 647         }
 648         return 0;
 649 }
 650
 651 static void pcs_pinconf_dbg_show(struct pinctrl_dev *pctldev,
 652                                 struct seq_file *s, unsigned pin)
 653 {
 654 }
 655
 656 static void pcs_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
 657                                 struct seq_file *s, unsigned selector)
 658 {
 659 }
 660
 661 static void pcs_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,
 662                                         struct seq_file *s,
 663                                         unsigned long config)
 664 {
 665         pinconf_generic_dump_config(pctldev, s, config);
 666 }
 667
 668 static const struct pinconf_ops pcs_pinconf_ops = {
 669         .pin_config_get = pcs_pinconf_get,
 670         .pin_config_set = pcs_pinconf_set,
 671         .pin_config_group_get = pcs_pinconf_group_get,
 672         .pin_config_group_set = pcs_pinconf_group_set,
 673         .pin_config_dbg_show = pcs_pinconf_dbg_show,
 674         .pin_config_group_dbg_show = pcs_pinconf_group_dbg_show,
 675         .pin_config_config_dbg_show = pcs_pinconf_config_dbg_show,
 676         .is_generic = true,
 677 };
 678
 679 /**
 680  * pcs_add_pin() - add a pin to the static per controller pin array
 681  * @pcs: pcs driver instance
 682  * @offset: register offset from base
 683  */
 684 static int pcs_add_pin(struct pcs_device *pcs, unsigned int offset)
 685 {
 686         struct pcs_soc_data *pcs_soc = &pcs->socdata;
 687         struct pinctrl_pin_desc *pin;
 688         int i;
 689
 690         i = pcs->pins.cur;
 691         if (i >= pcs->desc.npins) {
 692                 dev_err(pcs->dev, "too many pins, max %i\n",
 693                         pcs->desc.npins);
 694                 return -ENOMEM;
 695         }
 696
 697         if (pcs_soc->irq_enable_mask) {
 698                 unsigned val;
 699
 700                 val = pcs->read(pcs->base + offset);
 701                 if (val & pcs_soc->irq_enable_mask) {
 702                         dev_dbg(pcs->dev, "irq enabled at boot for pin at %lx (%x), clearing\n",
 703                                 (unsigned long)pcs->res->start + offset, val);
 704                         val &= ~pcs_soc->irq_enable_mask;
 705                         pcs->write(val, pcs->base + offset);
 706                 }
 707         }
 708
 709         pin = &pcs->pins.pa[i];
 710         pin->number = i;
 711         pcs->pins.cur++;
 712
 713         return i;
 714 }
 715
 716 /**
 717  * pcs_allocate_pin_table() - adds all the pins for the pinctrl driver
 718  * @pcs: pcs driver instance
 719  *
 720  * In case of errors, resources are freed in pcs_free_resources.
 721  *
 722  * If your hardware needs holes in the address space, then just set
 723  * up multiple driver instances.
 724  */
 725 static int pcs_allocate_pin_table(struct pcs_device *pcs)
 726 {
 727         int mux_bytes, nr_pins, i;
 728
 729         mux_bytes = pcs->width / BITS_PER_BYTE;
 730
 731         if (pcs->bits_per_mux && pcs->fmask) {
 732                 pcs->bits_per_pin = fls(pcs->fmask);
 733                 nr_pins = (pcs->size * BITS_PER_BYTE) / pcs->bits_per_pin;
 734         } else {
 735                 nr_pins = pcs->size / mux_bytes;
 736         }
 737
 738         dev_dbg(pcs->dev, "allocating %i pins\n", nr_pins);
 739         pcs->pins.pa = devm_kcalloc(pcs->dev,
 740                                 nr_pins, sizeof(*pcs->pins.pa),
 741                                 GFP_KERNEL);
 742         if (!pcs->pins.pa)
 743                 return -ENOMEM;
 744
 745         pcs->desc.pins = pcs->pins.pa;
 746         pcs->desc.npins = nr_pins;
 747
 748         for (i = 0; i < pcs->desc.npins; i++) {
 749                 unsigned offset;
 750                 int res;
 751
 752                 offset = pcs_pin_reg_offset_get(pcs, i);
 753                 res = pcs_add_pin(pcs, offset);
 754                 if (res < 0) {
 755                         dev_err(pcs->dev, "error adding pins: %i\n", res);
 756                         return res;
 757                 }
 758         }
 759
 760         return 0;
 761 }
 762
 763 /**
 764  * pcs_add_function() - adds a new function to the function list
 765  * @pcs: pcs driver instance
 766  * @fcn: new function allocated
 767  * @name: name of the function
 768  * @vals: array of mux register value pairs used by the function
 769  * @nvals: number of mux register value pairs
 770  * @pgnames: array of pingroup names for the function
 771  * @npgnames: number of pingroup names
 772  *
 773  * Caller must take care of locking.
 774  */
 775 static int pcs_add_function(struct pcs_device *pcs,
 776                             struct pcs_function **fcn,
 777                             const char *name,
 778                             struct pcs_func_vals *vals,
 779                             unsigned int nvals,
 780                             const char **pgnames,
 781                             unsigned int npgnames)
 782 {
 783         struct pcs_function *function;
 784         int selector;
 785
 786         function = devm_kzalloc(pcs->dev, sizeof(*function), GFP_KERNEL);
 787         if (!function)
 788                 return -ENOMEM;
 789
 790         function->vals = vals;
 791         function->nvals = nvals;
 792         function->name = name;
 793
 794         selector = pinmux_generic_add_function(pcs->pctl, name,
 795                                                pgnames, npgnames,
 796                                                function);
 797         if (selector < 0) {
 798                 devm_kfree(pcs->dev, function);
 799                 *fcn = NULL;
 800         } else {
 801                 *fcn = function;
 802         }
 803
 804         return selector;
 805 }
 806
 807 /**
 808  * pcs_get_pin_by_offset() - get a pin index based on the register offset
 809  * @pcs: pcs driver instance
 810  * @offset: register offset from the base
 811  *
 812  * Note that this is OK as long as the pins are in a static array.
 813  */
 814 static int pcs_get_pin_by_offset(struct pcs_device *pcs, unsigned offset)
 815 {
 816         unsigned index;
 817
 818         if (offset >= pcs->size) {
 819                 dev_err(pcs->dev, "mux offset out of range: 0x%x (0x%x)\n",
 820                         offset, pcs->size);
 821                 return -EINVAL;
 822         }
 823
 824         if (pcs->bits_per_mux)
 825                 index = (offset * BITS_PER_BYTE) / pcs->bits_per_pin;
 826         else
 827                 index = offset / (pcs->width / BITS_PER_BYTE);
 828
 829         return index;
 830 }
 831
 832 /*
 833  * check whether data matches enable bits or disable bits
 834  * Return value: 1 for matching enable bits, 0 for matching disable bits,
 835  *               and negative value for matching failure.
 836  */
 837 static int pcs_config_match(unsigned data, unsigned enable, unsigned disable)
 838 {
 839         int ret = -EINVAL;
 840
 841         if (data == enable)
 842                 ret = 1;
 843         else if (data == disable)
 844                 ret = 0;
 845         return ret;
 846 }
 847
 848 static void add_config(struct pcs_conf_vals **conf, enum pin_config_param param,
 849                        unsigned value, unsigned enable, unsigned disable,
 850                        unsigned mask)
 851 {
 852         (*conf)->param = param;
 853         (*conf)->val = value;
 854         (*conf)->enable = enable;
 855         (*conf)->disable = disable;
 856         (*conf)->mask = mask;
 857         (*conf)++;
 858 }
 859
 860 static void add_setting(unsigned long **setting, enum pin_config_param param,
 861                         unsigned arg)
 862 {
 863         **setting = pinconf_to_config_packed(param, arg);
 864         (*setting)++;
 865 }
 866
 867 /* add pinconf setting with 2 parameters */
 868 static void pcs_add_conf2(struct pcs_device *pcs, struct device_node *np,
 869                           const char *name, enum pin_config_param param,
 870                           struct pcs_conf_vals **conf, unsigned long **settings)
 871 {
 872         unsigned value[2], shift;
 873         int ret;
 874
 875         ret = of_property_read_u32_array(np, name, value, 2);
 876         if (ret)
 877                 return;
 878         /* set value & mask */
 879         value[0] &= value[1];
 880         shift = ffs(value[1]) - 1;
 881         /* skip enable & disable */
 882         add_config(conf, param, value[0], 0, 0, value[1]);
 883         add_setting(settings, param, value[0] >> shift);
 884 }
 885
 886 /* add pinconf setting with 4 parameters */
 887 static void pcs_add_conf4(struct pcs_device *pcs, struct device_node *np,
 888                           const char *name, enum pin_config_param param,
 889                           struct pcs_conf_vals **conf, unsigned long **settings)
 890 {
 891         unsigned value[4];
 892         int ret;
 893
 894         /* value to set, enable, disable, mask */
 895         ret = of_property_read_u32_array(np, name, value, 4);
 896         if (ret)
 897                 return;
 898         if (!value[3]) {
 899                 dev_err(pcs->dev, "mask field of the property can't be 0\n");
 900                 return;
 901         }
 902         value[0] &= value[3];
 903         value[1] &= value[3];
 904         value[2] &= value[3];
 905         ret = pcs_config_match(value[0], value[1], value[2]);
 906         if (ret < 0)
 907                 dev_dbg(pcs->dev, "failed to match enable or disable bits\n");
 908         add_config(conf, param, value[0], value[1], value[2], value[3]);
 909         add_setting(settings, param, ret);
 910 }
 911
 912 static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np,
 913                              struct pcs_function *func,
 914                              struct pinctrl_map **map)
 915
 916 {
 917         struct pinctrl_map *m = *map;
 918         int i = 0, nconfs = 0;
 919         unsigned long *settings = NULL, *s = NULL;
 920         struct pcs_conf_vals *conf = NULL;
 921         static const struct pcs_conf_type prop2[] = {
 922                 { "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, },
 923                 { "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, },
 924                 { "pinctrl-single,input-enable", PIN_CONFIG_INPUT_ENABLE, },
 925                 { "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, },
 926                 { "pinctrl-single,low-power-mode", PIN_CONFIG_MODE_LOW_POWER, },
 927         };
 928         static const struct pcs_conf_type prop4[] = {
 929                 { "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, },
 930                 { "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, },
 931                 { "pinctrl-single,input-schmitt-enable",
 932                         PIN_CONFIG_INPUT_SCHMITT_ENABLE, },
 933         };
 934
 935         /* If pinconf isn't supported, don't parse properties in below. */
 936         if (!PCS_HAS_PINCONF)
 937                 return -ENOTSUPP;
 938
 939         /* cacluate how much properties are supported in current node */
 940         for (i = 0; i < ARRAY_SIZE(prop2); i++) {
 941                 if (of_property_present(np, prop2[i].name))
 942                         nconfs++;
 943         }
 944         for (i = 0; i < ARRAY_SIZE(prop4); i++) {
 945                 if (of_property_present(np, prop4[i].name))
 946                         nconfs++;
 947         }
 948         if (!nconfs)
 949                 return -ENOTSUPP;
 950
 951         func->conf = devm_kcalloc(pcs->dev,
 952                                   nconfs, sizeof(struct pcs_conf_vals),
 953                                   GFP_KERNEL);
 954         if (!func->conf)
 955                 return -ENOMEM;
 956         func->nconfs = nconfs;
 957         conf = &(func->conf[0]);
 958         m++;
 959         settings = devm_kcalloc(pcs->dev, nconfs, sizeof(unsigned long),
 960                                 GFP_KERNEL);
 961         if (!settings)
 962                 return -ENOMEM;
 963         s = &settings[0];
 964
 965         for (i = 0; i < ARRAY_SIZE(prop2); i++)
 966                 pcs_add_conf2(pcs, np, prop2[i].name, prop2[i].param,
 967                               &conf, &s);
 968         for (i = 0; i < ARRAY_SIZE(prop4); i++)
 969                 pcs_add_conf4(pcs, np, prop4[i].name, prop4[i].param,
 970                               &conf, &s);
 971         m->type = PIN_MAP_TYPE_CONFIGS_GROUP;
 972         m->data.configs.group_or_pin = np->name;
 973         m->data.configs.configs = settings;
 974         m->data.configs.num_configs = nconfs;
 975         return 0;
 976 }
 977
 978 /**
 979  * pcs_parse_one_pinctrl_entry() - parses a device tree mux entry
 980  * @pcs: pinctrl driver instance
 981  * @np: device node of the mux entry
 982  * @map: map entry
 983  * @num_maps: number of map
 984  * @pgnames: pingroup names
 985  *
 986  * Note that this binding currently supports only sets of one register + value.
 987  *
 988  * Also note that this driver tries to avoid understanding pin and function
 989  * names because of the extra bloat they would cause especially in the case of
 990  * a large number of pins. This driver just sets what is specified for the board
 991  * in the .dts file. Further user space debugging tools can be developed to
 992  * decipher the pin and function names using debugfs.
 993  *
 994  * If you are concerned about the boot time, set up the static pins in
 995  * the bootloader, and only set up selected pins as device tree entries.
 996  */
 997 static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs,
 998                                                 struct device_node *np,
 999                                                 struct pinctrl_map **map,
1000                                                 unsigned *num_maps,
1001                                                 const char **pgnames)
1002 {
1003         const char *name = "pinctrl-single,pins";
1004         struct pcs_func_vals *vals;
1005         int rows, *pins, found = 0, res = -ENOMEM, i, fsel, gsel;
1006         struct pcs_function *function = NULL;
1007
1008         rows = pinctrl_count_index_with_args(np, name);
1009         if (rows <= 0) {
1010                 dev_err(pcs->dev, "Invalid number of rows: %d\n", rows);
1011                 return -EINVAL;
1012         }
1013
1014         vals = devm_kcalloc(pcs->dev, rows, sizeof(*vals), GFP_KERNEL);
1015         if (!vals)
1016                 return -ENOMEM;
1017
1018         pins = devm_kcalloc(pcs->dev, rows, sizeof(*pins), GFP_KERNEL);
1019         if (!pins)
1020                 goto free_vals;
1021
1022         for (i = 0; i < rows; i++) {
1023                 struct of_phandle_args pinctrl_spec;
1024                 unsigned int offset;
1025                 int pin;
1026
1027                 res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec);
1028                 if (res)
1029                         return res;
1030
1031                 if (pinctrl_spec.args_count < 2 || pinctrl_spec.args_count > 3) {
1032                         dev_err(pcs->dev, "invalid args_count for spec: %i\n",
1033                                 pinctrl_spec.args_count);
1034                         break;
1035                 }
1036
1037                 offset = pinctrl_spec.args[0];
1038                 vals[found].reg = pcs->base + offset;
1039
1040                 switch (pinctrl_spec.args_count) {
1041                 case 2:
1042                         vals[found].val = pinctrl_spec.args[1];
1043                         break;
1044                 case 3:
1045                         vals[found].val = (pinctrl_spec.args[1] | pinctrl_spec.args[2]);
1046                         break;
1047                 }
1048
1049                 dev_dbg(pcs->dev, "%pOFn index: 0x%x value: 0x%x\n",
1050                         pinctrl_spec.np, offset, vals[found].val);
1051
1052                 pin = pcs_get_pin_by_offset(pcs, offset);
1053                 if (pin < 0) {
1054                         dev_err(pcs->dev,
1055                                 "could not add functions for %pOFn %ux\n",
1056                                 np, offset);
1057                         break;
1058                 }
1059                 pins[found++] = pin;
1060         }
1061
1062         pgnames[0] = np->name;
1063         mutex_lock(&pcs->mutex);
1064         fsel = pcs_add_function(pcs, &function, np->name, vals, found,
1065                                 pgnames, 1);
1066         if (fsel < 0) {
1067                 res = fsel;
1068                 goto free_pins;
1069         }
1070
1071         gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
1072         if (gsel < 0) {
1073                 res = gsel;
1074                 goto free_function;
1075         }
1076
1077         (*map)->type = PIN_MAP_TYPE_MUX_GROUP;
1078         (*map)->data.mux.group = np->name;
1079         (*map)->data.mux.function = np->name;
1080
1081         if (PCS_HAS_PINCONF && function) {
1082                 res = pcs_parse_pinconf(pcs, np, function, map);
1083                 if (res == 0)
1084                         *num_maps = 2;
1085                 else if (res == -ENOTSUPP)
1086                         *num_maps = 1;
1087                 else
1088                         goto free_pingroups;
1089         } else {
1090                 *num_maps = 1;
1091         }
1092         mutex_unlock(&pcs->mutex);
1093
1094         return 0;
1095
1096 free_pingroups:
1097         pinctrl_generic_remove_group(pcs->pctl, gsel);
1098         *num_maps = 1;
1099 free_function:
1100         pinmux_generic_remove_function(pcs->pctl, fsel);
1101 free_pins:
1102         mutex_unlock(&pcs->mutex);
1103         devm_kfree(pcs->dev, pins);
1104
1105 free_vals:
1106         devm_kfree(pcs->dev, vals);
1107
1108         return res;
1109 }
1110
1111 static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,
1112                                                 struct device_node *np,
1113                                                 struct pinctrl_map **map,
1114                                                 unsigned *num_maps,
1115                                                 const char **pgnames)
1116 {
1117         const char *name = "pinctrl-single,bits";
1118         struct pcs_func_vals *vals;
1119         int rows, *pins, found = 0, res = -ENOMEM, i, fsel;
1120         int npins_in_row;
1121         struct pcs_function *function = NULL;
1122
1123         rows = pinctrl_count_index_with_args(np, name);
1124         if (rows <= 0) {
1125                 dev_err(pcs->dev, "Invalid number of rows: %d\n", rows);
1126                 return -EINVAL;
1127         }
1128
1129         if (PCS_HAS_PINCONF) {
1130                 dev_err(pcs->dev, "pinconf not supported\n");
1131                 return -ENOTSUPP;
1132         }
1133
1134         npins_in_row = pcs->width / pcs->bits_per_pin;
1135
1136         vals = devm_kzalloc(pcs->dev,
1137                             array3_size(rows, npins_in_row, sizeof(*vals)),
1138                             GFP_KERNEL);
1139         if (!vals)
1140                 return -ENOMEM;
1141
1142         pins = devm_kzalloc(pcs->dev,
1143                             array3_size(rows, npins_in_row, sizeof(*pins)),
1144                             GFP_KERNEL);
1145         if (!pins)
1146                 goto free_vals;
1147
1148         for (i = 0; i < rows; i++) {
1149                 struct of_phandle_args pinctrl_spec;
1150                 unsigned offset, val;
1151                 unsigned mask, bit_pos, val_pos, mask_pos, submask;
1152                 unsigned pin_num_from_lsb;
1153                 int pin;
1154
1155                 res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec);
1156                 if (res)
1157                         return res;
1158
1159                 if (pinctrl_spec.args_count < 3) {
1160                         dev_err(pcs->dev, "invalid args_count for spec: %i\n",
1161                                 pinctrl_spec.args_count);
1162                         break;
1163                 }
1164
1165                 /* Index plus two value cells */
1166                 offset = pinctrl_spec.args[0];
1167                 val = pinctrl_spec.args[1];
1168                 mask = pinctrl_spec.args[2];
1169
1170                 dev_dbg(pcs->dev, "%pOFn index: 0x%x value: 0x%x mask: 0x%x\n",
1171                         pinctrl_spec.np, offset, val, mask);
1172
1173                 /* Parse pins in each row from LSB */
1174                 while (mask) {
1175                         bit_pos = __ffs(mask);
1176                         pin_num_from_lsb = bit_pos / pcs->bits_per_pin;
1177                         mask_pos = ((pcs->fmask) << bit_pos);
1178                         val_pos = val & mask_pos;
1179                         submask = mask & mask_pos;
1180
1181                         if ((mask & mask_pos) == 0) {
1182                                 dev_err(pcs->dev,
1183                                         "Invalid mask for %pOFn at 0x%x\n",
1184                                         np, offset);
1185                                 break;
1186                         }
1187
1188                         mask &= ~mask_pos;
1189
1190                         if (submask != mask_pos) {
1191                                 dev_warn(pcs->dev,
1192                                                 "Invalid submask 0x%x for %pOFn at 0x%x\n",
1193                                                 submask, np, offset);
1194                                 continue;
1195                         }
1196
1197                         vals[found].mask = submask;
1198                         vals[found].reg = pcs->base + offset;
1199                         vals[found].val = val_pos;
1200
1201                         pin = pcs_get_pin_by_offset(pcs, offset);
1202                         if (pin < 0) {
1203                                 dev_err(pcs->dev,
1204                                         "could not add functions for %pOFn %ux\n",
1205                                         np, offset);
1206                                 break;
1207                         }
1208                         pins[found++] = pin + pin_num_from_lsb;
1209                 }
1210         }
1211
1212         pgnames[0] = np->name;
1213         mutex_lock(&pcs->mutex);
1214         fsel = pcs_add_function(pcs, &function, np->name, vals, found,
1215                                 pgnames, 1);
1216         if (fsel < 0) {
1217                 res = fsel;
1218                 goto free_pins;
1219         }
1220
1221         res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
1222         if (res < 0)
1223                 goto free_function;
1224
1225         (*map)->type = PIN_MAP_TYPE_MUX_GROUP;
1226         (*map)->data.mux.group = np->name;
1227         (*map)->data.mux.function = np->name;
1228
1229         *num_maps = 1;
1230         mutex_unlock(&pcs->mutex);
1231
1232         return 0;
1233
1234 free_function:
1235         pinmux_generic_remove_function(pcs->pctl, fsel);
1236 free_pins:
1237         mutex_unlock(&pcs->mutex);
1238         devm_kfree(pcs->dev, pins);
1239
1240 free_vals:
1241         devm_kfree(pcs->dev, vals);
1242
1243         return res;
1244 }
1245 /**
1246  * pcs_dt_node_to_map() - allocates and parses pinctrl maps
1247  * @pctldev: pinctrl instance
1248  * @np_config: device tree pinmux entry
1249  * @map: array of map entries
1250  * @num_maps: number of maps
1251  */
1252 static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev,
1253                                 struct device_node *np_config,
1254                                 struct pinctrl_map **map, unsigned *num_maps)
1255 {
1256         struct pcs_device *pcs;
1257         const char **pgnames;
1258         int ret;
1259
1260         pcs = pinctrl_dev_get_drvdata(pctldev);
1261
1262         /* create 2 maps. One is for pinmux, and the other is for pinconf. */
1263         *map = devm_kcalloc(pcs->dev, 2, sizeof(**map), GFP_KERNEL);
1264         if (!*map)
1265                 return -ENOMEM;
1266
1267         *num_maps = 0;
1268
1269         pgnames = devm_kzalloc(pcs->dev, sizeof(*pgnames), GFP_KERNEL);
1270         if (!pgnames) {
1271                 ret = -ENOMEM;
1272                 goto free_map;
1273         }
1274
1275         if (pcs->bits_per_mux) {
1276                 ret = pcs_parse_bits_in_pinctrl_entry(pcs, np_config, map,
1277                                 num_maps, pgnames);
1278                 if (ret < 0) {
1279                         dev_err(pcs->dev, "no pins entries for %pOFn\n",
1280                                 np_config);
1281                         goto free_pgnames;
1282                 }
1283         } else {
1284                 ret = pcs_parse_one_pinctrl_entry(pcs, np_config, map,
1285                                 num_maps, pgnames);
1286                 if (ret < 0) {
1287                         dev_err(pcs->dev, "no pins entries for %pOFn\n",
1288                                 np_config);
1289                         goto free_pgnames;
1290                 }
1291         }
1292
1293         return 0;
1294
1295 free_pgnames:
1296         devm_kfree(pcs->dev, pgnames);
1297 free_map:
1298         devm_kfree(pcs->dev, *map);
1299
1300         return ret;
1301 }
1302
1303 /**
1304  * pcs_irq_free() - free interrupt
1305  * @pcs: pcs driver instance
1306  */
1307 static void pcs_irq_free(struct pcs_device *pcs)
1308 {
1309         struct pcs_soc_data *pcs_soc = &pcs->socdata;
1310
1311         if (pcs_soc->irq < 0)
1312                 return;
1313
1314         if (pcs->domain)
1315                 irq_domain_remove(pcs->domain);
1316
1317         if (PCS_QUIRK_HAS_SHARED_IRQ)
1318                 free_irq(pcs_soc->irq, pcs_soc);
1319         else
1320                 irq_set_chained_handler(pcs_soc->irq, NULL);
1321 }
1322
1323 /**
1324  * pcs_free_resources() - free memory used by this driver
1325  * @pcs: pcs driver instance
1326  */
1327 static void pcs_free_resources(struct pcs_device *pcs)
1328 {
1329         pcs_irq_free(pcs);
1330         pinctrl_unregister(pcs->pctl);
1331
1332 #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE)
1333         if (pcs->missing_nr_pinctrl_cells)
1334                 of_remove_property(pcs->np, pcs->missing_nr_pinctrl_cells);
1335 #endif
1336 }
1337
1338 static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs)
1339 {
1340         const char *propname = "pinctrl-single,gpio-range";
1341         const char *cellname = "#pinctrl-single,gpio-range-cells";
1342         struct of_phandle_args gpiospec;
1343         struct pcs_gpiofunc_range *range;
1344         int ret, i;
1345
1346         for (i = 0; ; i++) {
1347                 ret = of_parse_phandle_with_args(node, propname, cellname,
1348                                                  i, &gpiospec);
1349                 /* Do not treat it as error. Only treat it as end condition. */
1350                 if (ret) {
1351                         ret = 0;
1352                         break;
1353                 }
1354                 range = devm_kzalloc(pcs->dev, sizeof(*range), GFP_KERNEL);
1355                 if (!range) {
1356                         ret = -ENOMEM;
1357                         break;
1358                 }
1359                 range->offset = gpiospec.args[0];
1360                 range->npins = gpiospec.args[1];
1361                 range->gpiofunc = gpiospec.args[2];
1362                 mutex_lock(&pcs->mutex);
1363                 list_add_tail(&range->node, &pcs->gpiofuncs);
1364                 mutex_unlock(&pcs->mutex);
1365         }
1366         return ret;
1367 }
1368
1369 /**
1370  * struct pcs_interrupt
1371  * @reg:        virtual address of interrupt register
1372  * @hwirq:      hardware irq number
1373  * @irq:        virtual irq number
1374  * @node:       list node
1375  */
1376 struct pcs_interrupt {
1377         void __iomem *reg;
1378         irq_hw_number_t hwirq;
1379         unsigned int irq;
1380         struct list_head node;
1381 };
1382
1383 /**
1384  * pcs_irq_set() - enables or disables an interrupt
1385  * @pcs_soc: SoC specific settings
1386  * @irq: interrupt
1387  * @enable: enable or disable the interrupt
1388  *
1389  * Note that this currently assumes one interrupt per pinctrl
1390  * register that is typically used for wake-up events.
1391  */
1392 static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc,
1393                                int irq, const bool enable)
1394 {
1395         struct pcs_device *pcs;
1396         struct list_head *pos;
1397         unsigned mask;
1398
1399         pcs = container_of(pcs_soc, struct pcs_device, socdata);
1400         list_for_each(pos, &pcs->irqs) {
1401                 struct pcs_interrupt *pcswi;
1402                 unsigned soc_mask;
1403
1404                 pcswi = list_entry(pos, struct pcs_interrupt, node);
1405                 if (irq != pcswi->irq)
1406                         continue;
1407
1408                 soc_mask = pcs_soc->irq_enable_mask;
1409                 raw_spin_lock(&pcs->lock);
1410                 mask = pcs->read(pcswi->reg);
1411                 if (enable)
1412                         mask |= soc_mask;
1413                 else
1414                         mask &= ~soc_mask;
1415                 pcs->write(mask, pcswi->reg);
1416
1417                 /* flush posted write */
1418                 mask = pcs->read(pcswi->reg);
1419                 raw_spin_unlock(&pcs->lock);
1420         }
1421
1422         if (pcs_soc->rearm)
1423                 pcs_soc->rearm();
1424 }
1425
1426 /**
1427  * pcs_irq_mask() - mask pinctrl interrupt
1428  * @d: interrupt data
1429  */
1430 static void pcs_irq_mask(struct irq_data *d)
1431 {
1432         struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d);
1433
1434         pcs_irq_set(pcs_soc, d->irq, false);
1435 }
1436
1437 /**
1438  * pcs_irq_unmask() - unmask pinctrl interrupt
1439  * @d: interrupt data
1440  */
1441 static void pcs_irq_unmask(struct irq_data *d)
1442 {
1443         struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d);
1444
1445         pcs_irq_set(pcs_soc, d->irq, true);
1446 }
1447
1448 /**
1449  * pcs_irq_set_wake() - toggle the suspend and resume wake up
1450  * @d: interrupt data
1451  * @state: wake-up state
1452  *
1453  * Note that this should be called only for suspend and resume.
1454  * For runtime PM, the wake-up events should be enabled by default.
1455  */
1456 static int pcs_irq_set_wake(struct irq_data *d, unsigned int state)
1457 {
1458         if (state)
1459                 pcs_irq_unmask(d);
1460         else
1461                 pcs_irq_mask(d);
1462
1463         return 0;
1464 }
1465
1466 /**
1467  * pcs_irq_handle() - common interrupt handler
1468  * @pcs_soc: SoC specific settings
1469  *
1470  * Note that this currently assumes we have one interrupt bit per
1471  * mux register. This interrupt is typically used for wake-up events.
1472  * For more complex interrupts different handlers can be specified.
1473  */
1474 static int pcs_irq_handle(struct pcs_soc_data *pcs_soc)
1475 {
1476         struct pcs_device *pcs;
1477         struct list_head *pos;
1478         int count = 0;
1479
1480         pcs = container_of(pcs_soc, struct pcs_device, socdata);
1481         list_for_each(pos, &pcs->irqs) {
1482                 struct pcs_interrupt *pcswi;
1483                 unsigned mask;
1484
1485                 pcswi = list_entry(pos, struct pcs_interrupt, node);
1486                 raw_spin_lock(&pcs->lock);
1487                 mask = pcs->read(pcswi->reg);
1488                 raw_spin_unlock(&pcs->lock);
1489                 if (mask & pcs_soc->irq_status_mask) {
1490                         generic_handle_domain_irq(pcs->domain,
1491                                                   pcswi->hwirq);
1492                         count++;
1493                 }
1494         }
1495
1496         return count;
1497 }
1498
1499 /**
1500  * pcs_irq_handler() - handler for the shared interrupt case
1501  * @irq: interrupt
1502  * @d: data
1503  *
1504  * Use this for cases where multiple instances of
1505  * pinctrl-single share a single interrupt like on omaps.
1506  */
1507 static irqreturn_t pcs_irq_handler(int irq, void *d)
1508 {
1509         struct pcs_soc_data *pcs_soc = d;
1510
1511         return pcs_irq_handle(pcs_soc) ? IRQ_HANDLED : IRQ_NONE;
1512 }
1513
1514 /**
1515  * pcs_irq_chain_handler() - handler for the dedicated chained interrupt case
1516  * @desc: interrupt descriptor
1517  *
1518  * Use this if you have a separate interrupt for each
1519  * pinctrl-single instance.
1520  */
1521 static void pcs_irq_chain_handler(struct irq_desc *desc)
1522 {
1523         struct pcs_soc_data *pcs_soc = irq_desc_get_handler_data(desc);
1524         struct irq_chip *chip;
1525
1526         chip = irq_desc_get_chip(desc);
1527         chained_irq_enter(chip, desc);
1528         pcs_irq_handle(pcs_soc);
1529         /* REVISIT: export and add handle_bad_irq(irq, desc)? */
1530         chained_irq_exit(chip, desc);
1531 }
1532
1533 static int pcs_irqdomain_map(struct irq_domain *d, unsigned int irq,
1534                              irq_hw_number_t hwirq)
1535 {
1536         struct pcs_soc_data *pcs_soc = d->host_data;
1537         struct pcs_device *pcs;
1538         struct pcs_interrupt *pcswi;
1539
1540         pcs = container_of(pcs_soc, struct pcs_device, socdata);
1541         pcswi = devm_kzalloc(pcs->dev, sizeof(*pcswi), GFP_KERNEL);
1542         if (!pcswi)
1543                 return -ENOMEM;
1544
1545         pcswi->reg = pcs->base + hwirq;
1546         pcswi->hwirq = hwirq;
1547         pcswi->irq = irq;
1548
1549         mutex_lock(&pcs->mutex);
1550         list_add_tail(&pcswi->node, &pcs->irqs);
1551         mutex_unlock(&pcs->mutex);
1552
1553         irq_set_chip_data(irq, pcs_soc);
1554         irq_set_chip_and_handler(irq, &pcs->chip,
1555                                  handle_level_irq);
1556         irq_set_lockdep_class(irq, &pcs_lock_class, &pcs_request_class);
1557         irq_set_noprobe(irq);
1558
1559         return 0;
1560 }
1561
1562 static const struct irq_domain_ops pcs_irqdomain_ops = {
1563         .map = pcs_irqdomain_map,
1564         .xlate = irq_domain_xlate_onecell,
1565 };
1566
1567 /**
1568  * pcs_irq_init_chained_handler() - set up a chained interrupt handler
1569  * @pcs: pcs driver instance
1570  * @np: device node pointer
1571  */
1572 static int pcs_irq_init_chained_handler(struct pcs_device *pcs,
1573                                         struct device_node *np)
1574 {
1575         struct pcs_soc_data *pcs_soc = &pcs->socdata;
1576         const char *name = "pinctrl";
1577         int num_irqs;
1578
1579         if (!pcs_soc->irq_enable_mask ||
1580             !pcs_soc->irq_status_mask) {
1581                 pcs_soc->irq = -1;
1582                 return -EINVAL;
1583         }
1584
1585         INIT_LIST_HEAD(&pcs->irqs);
1586         pcs->chip.name = name;
1587         pcs->chip.irq_ack = pcs_irq_mask;
1588         pcs->chip.irq_mask = pcs_irq_mask;
1589         pcs->chip.irq_unmask = pcs_irq_unmask;
1590         pcs->chip.irq_set_wake = pcs_irq_set_wake;
1591
1592         if (PCS_QUIRK_HAS_SHARED_IRQ) {
1593                 int res;
1594
1595                 res = request_irq(pcs_soc->irq, pcs_irq_handler,
1596                                   IRQF_SHARED | IRQF_NO_SUSPEND |
1597                                   IRQF_NO_THREAD,
1598                                   name, pcs_soc);
1599                 if (res) {
1600                         pcs_soc->irq = -1;
1601                         return res;
1602                 }
1603         } else {
1604                 irq_set_chained_handler_and_data(pcs_soc->irq,
1605                                                  pcs_irq_chain_handler,
1606                                                  pcs_soc);
1607         }
1608
1609         /*
1610          * We can use the register offset as the hardirq
1611          * number as irq_domain_add_simple maps them lazily.
1612          * This way we can easily support more than one
1613          * interrupt per function if needed.
1614          */
1615         num_irqs = pcs->size;
1616
1617         pcs->domain = irq_domain_add_simple(np, num_irqs, 0,
1618                                             &pcs_irqdomain_ops,
1619                                             pcs_soc);
1620         if (!pcs->domain) {
1621                 irq_set_chained_handler(pcs_soc->irq, NULL);
1622                 return -EINVAL;
1623         }
1624
1625         return 0;
1626 }
1627
1628 #ifdef CONFIG_PM
1629 static int pcs_save_context(struct pcs_device *pcs)
1630 {
1631         int i, mux_bytes;
1632         u64 *regsl;
1633         u32 *regsw;
1634         u16 *regshw;
1635
1636         mux_bytes = pcs->width / BITS_PER_BYTE;
1637
1638         if (!pcs->saved_vals) {
1639                 pcs->saved_vals = devm_kzalloc(pcs->dev, pcs->size, GFP_ATOMIC);
1640                 if (!pcs->saved_vals)
1641                         return -ENOMEM;
1642         }
1643
1644         switch (pcs->width) {
1645         case 64:
1646                 regsl = pcs->saved_vals;
1647                 for (i = 0; i < pcs->size; i += mux_bytes)
1648                         *regsl++ = pcs->read(pcs->base + i);
1649                 break;
1650         case 32:
1651                 regsw = pcs->saved_vals;
1652                 for (i = 0; i < pcs->size; i += mux_bytes)
1653                         *regsw++ = pcs->read(pcs->base + i);
1654                 break;
1655         case 16:
1656                 regshw = pcs->saved_vals;
1657                 for (i = 0; i < pcs->size; i += mux_bytes)
1658                         *regshw++ = pcs->read(pcs->base + i);
1659                 break;
1660         }
1661
1662         return 0;
1663 }
1664
1665 static void pcs_restore_context(struct pcs_device *pcs)
1666 {
1667         int i, mux_bytes;
1668         u64 *regsl;
1669         u32 *regsw;
1670         u16 *regshw;
1671
1672         mux_bytes = pcs->width / BITS_PER_BYTE;
1673
1674         switch (pcs->width) {
1675         case 64:
1676                 regsl = pcs->saved_vals;
1677                 for (i = 0; i < pcs->size; i += mux_bytes)
1678                         pcs->write(*regsl++, pcs->base + i);
1679                 break;
1680         case 32:
1681                 regsw = pcs->saved_vals;
1682                 for (i = 0; i < pcs->size; i += mux_bytes)
1683                         pcs->write(*regsw++, pcs->base + i);
1684                 break;
1685         case 16:
1686                 regshw = pcs->saved_vals;
1687                 for (i = 0; i < pcs->size; i += mux_bytes)
1688                         pcs->write(*regshw++, pcs->base + i);
1689                 break;
1690         }
1691 }
1692
1693 static int pinctrl_single_suspend(struct platform_device *pdev,
1694                                         pm_message_t state)
1695 {
1696         struct pcs_device *pcs;
1697
1698         pcs = platform_get_drvdata(pdev);
1699         if (!pcs)
1700                 return -EINVAL;
1701
1702         if (pcs->flags & PCS_CONTEXT_LOSS_OFF) {
1703                 int ret;
1704
1705                 ret = pcs_save_context(pcs);
1706                 if (ret < 0)
1707                         return ret;
1708         }
1709
1710         return pinctrl_force_sleep(pcs->pctl);
1711 }
1712
1713 static int pinctrl_single_resume(struct platform_device *pdev)
1714 {
1715         struct pcs_device *pcs;
1716
1717         pcs = platform_get_drvdata(pdev);
1718         if (!pcs)
1719                 return -EINVAL;
1720
1721         if (pcs->flags & PCS_CONTEXT_LOSS_OFF)
1722                 pcs_restore_context(pcs);
1723
1724         return pinctrl_force_default(pcs->pctl);
1725 }
1726 #endif
1727
1728 /**
1729  * pcs_quirk_missing_pinctrl_cells - handle legacy binding
1730  * @pcs: pinctrl driver instance
1731  * @np: device tree node
1732  * @cells: number of cells
1733  *
1734  * Handle legacy binding with no #pinctrl-cells. This should be
1735  * always two pinctrl-single,bit-per-mux and one for others.
1736  * At some point we may want to consider removing this.
1737  */
1738 static int pcs_quirk_missing_pinctrl_cells(struct pcs_device *pcs,
1739                                            struct device_node *np,
1740                                            int cells)
1741 {
1742         struct property *p;
1743         const char *name = "#pinctrl-cells";
1744         int error;
1745         u32 val;
1746
1747         error = of_property_read_u32(np, name, &val);
1748         if (!error)
1749                 return 0;
1750
1751         dev_warn(pcs->dev, "please update dts to use %s = <%i>\n",
1752                  name, cells);
1753
1754         p = devm_kzalloc(pcs->dev, sizeof(*p), GFP_KERNEL);
1755         if (!p)
1756                 return -ENOMEM;
1757
1758         p->length = sizeof(__be32);
1759         p->value = devm_kzalloc(pcs->dev, sizeof(__be32), GFP_KERNEL);
1760         if (!p->value)
1761                 return -ENOMEM;
1762         *(__be32 *)p->value = cpu_to_be32(cells);
1763
1764         p->name = devm_kstrdup(pcs->dev, name, GFP_KERNEL);
1765         if (!p->name)
1766                 return -ENOMEM;
1767
1768         pcs->missing_nr_pinctrl_cells = p;
1769
1770 #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE)
1771         error = of_add_property(np, pcs->missing_nr_pinctrl_cells);
1772 #endif
1773
1774         return error;
1775 }
1776
1777 static int pcs_probe(struct platform_device *pdev)
1778 {
1779         struct device_node *np = pdev->dev.of_node;
1780         struct pcs_pdata *pdata;
1781         struct resource *res;
1782         struct pcs_device *pcs;
1783         const struct pcs_soc_data *soc;
1784         int ret;
1785
1786         soc = of_device_get_match_data(&pdev->dev);
1787         if (WARN_ON(!soc))
1788                 return -EINVAL;
1789
1790         pcs = devm_kzalloc(&pdev->dev, sizeof(*pcs), GFP_KERNEL);
1791         if (!pcs)
1792                 return -ENOMEM;
1793
1794         pcs->dev = &pdev->dev;
1795         pcs->np = np;
1796         raw_spin_lock_init(&pcs->lock);
1797         mutex_init(&pcs->mutex);
1798         INIT_LIST_HEAD(&pcs->gpiofuncs);
1799         pcs->flags = soc->flags;
1800         memcpy(&pcs->socdata, soc, sizeof(*soc));
1801
1802         ret = of_property_read_u32(np, "pinctrl-single,register-width",
1803                                    &pcs->width);
1804         if (ret) {
1805                 dev_err(pcs->dev, "register width not specified\n");
1806
1807                 return ret;
1808         }
1809
1810         ret = of_property_read_u32(np, "pinctrl-single,function-mask",
1811                                    &pcs->fmask);
1812         if (!ret) {
1813                 pcs->fshift = __ffs(pcs->fmask);
1814                 pcs->fmax = pcs->fmask >> pcs->fshift;
1815         } else {
1816                 /* If mask property doesn't exist, function mux is invalid. */
1817                 pcs->fmask = 0;
1818                 pcs->fshift = 0;
1819                 pcs->fmax = 0;
1820         }
1821
1822         ret = of_property_read_u32(np, "pinctrl-single,function-off",
1823                                         &pcs->foff);
1824         if (ret)
1825                 pcs->foff = PCS_OFF_DISABLED;
1826
1827         pcs->bits_per_mux = of_property_read_bool(np,
1828                                                   "pinctrl-single,bit-per-mux");
1829         ret = pcs_quirk_missing_pinctrl_cells(pcs, np,
1830                                               pcs->bits_per_mux ? 2 : 1);
1831         if (ret) {
1832                 dev_err(&pdev->dev, "unable to patch #pinctrl-cells\n");
1833
1834                 return ret;
1835         }
1836
1837         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1838         if (!res) {
1839                 dev_err(pcs->dev, "could not get resource\n");
1840                 return -ENODEV;
1841         }
1842
1843         pcs->res = devm_request_mem_region(pcs->dev, res->start,
1844                         resource_size(res), DRIVER_NAME);
1845         if (!pcs->res) {
1846                 dev_err(pcs->dev, "could not get mem_region\n");
1847                 return -EBUSY;
1848         }
1849
1850         pcs->size = resource_size(pcs->res);
1851         pcs->base = devm_ioremap(pcs->dev, pcs->res->start, pcs->size);
1852         if (!pcs->base) {
1853                 dev_err(pcs->dev, "could not ioremap\n");
1854                 return -ENODEV;
1855         }
1856
1857         platform_set_drvdata(pdev, pcs);
1858
1859         switch (pcs->width) {
1860         case 8:
1861                 pcs->read = pcs_readb;
1862                 pcs->write = pcs_writeb;
1863                 break;
1864         case 16:
1865                 pcs->read = pcs_readw;
1866                 pcs->write = pcs_writew;
1867                 break;
1868         case 32:
1869                 pcs->read = pcs_readl;
1870                 pcs->write = pcs_writel;
1871                 break;
1872         default:
1873                 break;
1874         }
1875
1876         pcs->desc.name = DRIVER_NAME;
1877         pcs->desc.pctlops = &pcs_pinctrl_ops;
1878         pcs->desc.pmxops = &pcs_pinmux_ops;
1879         if (PCS_HAS_PINCONF)
1880                 pcs->desc.confops = &pcs_pinconf_ops;
1881         pcs->desc.owner = THIS_MODULE;
1882
1883         ret = pcs_allocate_pin_table(pcs);
1884         if (ret < 0)
1885                 goto free;
1886
1887         ret = pinctrl_register_and_init(&pcs->desc, pcs->dev, pcs, &pcs->pctl);
1888         if (ret) {
1889                 dev_err(pcs->dev, "could not register single pinctrl driver\n");
1890                 goto free;
1891         }
1892
1893         ret = pcs_add_gpio_func(np, pcs);
1894         if (ret < 0)
1895                 goto free;
1896
1897         pcs->socdata.irq = irq_of_parse_and_map(np, 0);
1898         if (pcs->socdata.irq)
1899                 pcs->flags |= PCS_FEAT_IRQ;
1900
1901         /* We still need auxdata for some omaps for PRM interrupts */
1902         pdata = dev_get_platdata(&pdev->dev);
1903         if (pdata) {
1904                 if (pdata->rearm)
1905                         pcs->socdata.rearm = pdata->rearm;
1906                 if (pdata->irq) {
1907                         pcs->socdata.irq = pdata->irq;
1908                         pcs->flags |= PCS_FEAT_IRQ;
1909                 }
1910         }
1911
1912         if (PCS_HAS_IRQ) {
1913                 ret = pcs_irq_init_chained_handler(pcs, np);
1914                 if (ret < 0)
1915                         dev_warn(pcs->dev, "initialized with no interrupts\n");
1916         }
1917
1918         dev_info(pcs->dev, "%i pins, size %u\n", pcs->desc.npins, pcs->size);
1919
1920         return pinctrl_enable(pcs->pctl);
1921
1922 free:
1923         pcs_free_resources(pcs);
1924
1925         return ret;
1926 }
1927
1928 static void pcs_remove(struct platform_device *pdev)
1929 {
1930         struct pcs_device *pcs = platform_get_drvdata(pdev);
1931
1932         pcs_free_resources(pcs);
1933 }
1934
1935 static const struct pcs_soc_data pinctrl_single_omap_wkup = {
1936         .flags = PCS_QUIRK_SHARED_IRQ,
1937         .irq_enable_mask = (1 << 14),   /* OMAP_WAKEUP_EN */
1938         .irq_status_mask = (1 << 15),   /* OMAP_WAKEUP_EVENT */
1939 };
1940
1941 static const struct pcs_soc_data pinctrl_single_dra7 = {
1942         .irq_enable_mask = (1 << 24),   /* WAKEUPENABLE */
1943         .irq_status_mask = (1 << 25),   /* WAKEUPEVENT */
1944 };
1945
1946 static const struct pcs_soc_data pinctrl_single_am437x = {
1947         .flags = PCS_QUIRK_SHARED_IRQ | PCS_CONTEXT_LOSS_OFF,
1948         .irq_enable_mask = (1 << 29),   /* OMAP_WAKEUP_EN */
1949         .irq_status_mask = (1 << 30),   /* OMAP_WAKEUP_EVENT */
1950 };
1951
1952 static const struct pcs_soc_data pinctrl_single_am654 = {
1953         .flags = PCS_QUIRK_SHARED_IRQ | PCS_CONTEXT_LOSS_OFF,
1954         .irq_enable_mask = (1 << 29),   /* WKUP_EN */
1955         .irq_status_mask = (1 << 30),   /* WKUP_EVT */
1956 };
1957
1958 static const struct pcs_soc_data pinctrl_single_j7200 = {
1959         .flags = PCS_CONTEXT_LOSS_OFF,
1960 };
1961
1962 static const struct pcs_soc_data pinctrl_single = {
1963 };
1964
1965 static const struct pcs_soc_data pinconf_single = {
1966         .flags = PCS_FEAT_PINCONF,
1967 };
1968
1969 static const struct of_device_id pcs_of_match[] = {
1970         { .compatible = "ti,am437-padconf", .data = &pinctrl_single_am437x },
1971         { .compatible = "ti,am654-padconf", .data = &pinctrl_single_am654 },
1972         { .compatible = "ti,dra7-padconf", .data = &pinctrl_single_dra7 },
1973         { .compatible = "ti,omap3-padconf", .data = &pinctrl_single_omap_wkup },
1974         { .compatible = "ti,omap4-padconf", .data = &pinctrl_single_omap_wkup },
1975         { .compatible = "ti,omap5-padconf", .data = &pinctrl_single_omap_wkup },
1976         { .compatible = "ti,j7200-padconf", .data = &pinctrl_single_j7200 },
1977         { .compatible = "pinctrl-single", .data = &pinctrl_single },
1978         { .compatible = "pinconf-single", .data = &pinconf_single },
1979         { },
1980 };
1981 MODULE_DEVICE_TABLE(of, pcs_of_match);
1982
1983 static struct platform_driver pcs_driver = {
1984         .probe          = pcs_probe,
1985         .remove_new     = pcs_remove,
1986         .driver = {
1987                 .name           = DRIVER_NAME,
1988                 .of_match_table = pcs_of_match,
1989         },
1990 #ifdef CONFIG_PM
1991         .suspend = pinctrl_single_suspend,
1992         .resume = pinctrl_single_resume,
1993 #endif
1994 };
1995
1996 module_platform_driver(pcs_driver);
1997
1998 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
1999 MODULE_DESCRIPTION("One-register-per-pin type device tree based pinctrl driver");
2000 MODULE_LICENSE("GPL v2");