drivers/pinctrl/cirrus/pinctrl-madera-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Pinctrl for Cirrus Logic Madera codecs
   4  *
   5  * Copyright (C) 2016-2018 Cirrus Logic
   6  */
   7
   8 #include <linux/err.h>
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/regmap.h>
  12 #include <linux/slab.h>
  13 #include <linux/pinctrl/machine.h>
  14 #include <linux/pinctrl/pinctrl.h>
  15 #include <linux/pinctrl/pinmux.h>
  16 #include <linux/pinctrl/pinconf.h>
  17 #include <linux/pinctrl/pinconf-generic.h>
  18
  19 #include <linux/mfd/madera/core.h>
  20 #include <linux/mfd/madera/registers.h>
  21
  22 #include "../pinctrl-utils.h"
  23
  24 #include "pinctrl-madera.h"
  25
  26 /*
  27  * Use pin GPIO names for consistency
  28  * NOTE: IDs are zero-indexed for coding convenience
  29  */
  30 static const struct pinctrl_pin_desc madera_pins[] = {
  31         PINCTRL_PIN(0, "gpio1"),
  32         PINCTRL_PIN(1, "gpio2"),
  33         PINCTRL_PIN(2, "gpio3"),
  34         PINCTRL_PIN(3, "gpio4"),
  35         PINCTRL_PIN(4, "gpio5"),
  36         PINCTRL_PIN(5, "gpio6"),
  37         PINCTRL_PIN(6, "gpio7"),
  38         PINCTRL_PIN(7, "gpio8"),
  39         PINCTRL_PIN(8, "gpio9"),
  40         PINCTRL_PIN(9, "gpio10"),
  41         PINCTRL_PIN(10, "gpio11"),
  42         PINCTRL_PIN(11, "gpio12"),
  43         PINCTRL_PIN(12, "gpio13"),
  44         PINCTRL_PIN(13, "gpio14"),
  45         PINCTRL_PIN(14, "gpio15"),
  46         PINCTRL_PIN(15, "gpio16"),
  47         PINCTRL_PIN(16, "gpio17"),
  48         PINCTRL_PIN(17, "gpio18"),
  49         PINCTRL_PIN(18, "gpio19"),
  50         PINCTRL_PIN(19, "gpio20"),
  51         PINCTRL_PIN(20, "gpio21"),
  52         PINCTRL_PIN(21, "gpio22"),
  53         PINCTRL_PIN(22, "gpio23"),
  54         PINCTRL_PIN(23, "gpio24"),
  55         PINCTRL_PIN(24, "gpio25"),
  56         PINCTRL_PIN(25, "gpio26"),
  57         PINCTRL_PIN(26, "gpio27"),
  58         PINCTRL_PIN(27, "gpio28"),
  59         PINCTRL_PIN(28, "gpio29"),
  60         PINCTRL_PIN(29, "gpio30"),
  61         PINCTRL_PIN(30, "gpio31"),
  62         PINCTRL_PIN(31, "gpio32"),
  63         PINCTRL_PIN(32, "gpio33"),
  64         PINCTRL_PIN(33, "gpio34"),
  65         PINCTRL_PIN(34, "gpio35"),
  66         PINCTRL_PIN(35, "gpio36"),
  67         PINCTRL_PIN(36, "gpio37"),
  68         PINCTRL_PIN(37, "gpio38"),
  69         PINCTRL_PIN(38, "gpio39"),
  70         PINCTRL_PIN(39, "gpio40"),
  71 };
  72
  73 /*
  74  * All single-pin functions can be mapped to any GPIO, however pinmux applies
  75  * functions to pin groups and only those groups declared as supporting that
  76  * function. To make this work we must put each pin in its own dummy group so
  77  * that the functions can be described as applying to all pins.
  78  * Since these do not correspond to anything in the actual hardware - they are
  79  * merely an adaptation to pinctrl's view of the world - we use the same name
  80  * as the pin to avoid confusion when comparing with datasheet instructions
  81  */
  82 static const char * const madera_pin_single_group_names[] = {
  83         "gpio1",  "gpio2",  "gpio3",  "gpio4",  "gpio5",  "gpio6",  "gpio7",
  84         "gpio8",  "gpio9",  "gpio10", "gpio11", "gpio12", "gpio13", "gpio14",
  85         "gpio15", "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21",
  86         "gpio22", "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28",
  87         "gpio29", "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35",
  88         "gpio36", "gpio37", "gpio38", "gpio39", "gpio40",
  89 };
  90
  91 /* set of pin numbers for single-pin groups, zero-indexed */
  92 static const unsigned int madera_pin_single_group_pins[] = {
  93           0,  1,  2,  3,  4,  5,  6,
  94           7,  8,  9, 10, 11, 12, 13,
  95          14, 15, 16, 17, 18, 19, 20,
  96          21, 22, 23, 24, 25, 26, 27,
  97          28, 29, 30, 31, 32, 33, 34,
  98          35, 36, 37, 38, 39,
  99 };
 100
 101 static const char * const madera_aif1_group_names[] = { "aif1" };
 102 static const char * const madera_aif2_group_names[] = { "aif2" };
 103 static const char * const madera_aif3_group_names[] = { "aif3" };
 104 static const char * const madera_aif4_group_names[] = { "aif4" };
 105 static const char * const madera_mif1_group_names[] = { "mif1" };
 106 static const char * const madera_mif2_group_names[] = { "mif2" };
 107 static const char * const madera_mif3_group_names[] = { "mif3" };
 108 static const char * const madera_dmic3_group_names[] = { "dmic3" };
 109 static const char * const madera_dmic4_group_names[] = { "dmic4" };
 110 static const char * const madera_dmic5_group_names[] = { "dmic5" };
 111 static const char * const madera_dmic6_group_names[] = { "dmic6" };
 112 static const char * const madera_spk1_group_names[] = { "pdmspk1" };
 113 static const char * const madera_spk2_group_names[] = { "pdmspk2" };
 114
 115 /*
 116  * alt-functions always apply to a single pin group, other functions always
 117  * apply to all pins
 118  */
 119 static const struct {
 120         const char *name;
 121         const char * const *group_names;
 122         u32 func;
 123 } madera_mux_funcs[] = {
 124         {
 125                 .name = "aif1",
 126                 .group_names = madera_aif1_group_names,
 127                 .func = 0x000
 128         },
 129         {
 130                 .name = "aif2",
 131                 .group_names = madera_aif2_group_names,
 132                 .func = 0x000
 133         },
 134         {
 135                 .name = "aif3",
 136                 .group_names = madera_aif3_group_names,
 137                 .func = 0x000
 138         },
 139         {
 140                 .name = "aif4",
 141                 .group_names = madera_aif4_group_names,
 142                 .func = 0x000
 143         },
 144         {
 145                 .name = "mif1",
 146                 .group_names = madera_mif1_group_names,
 147                 .func = 0x000
 148         },
 149         {
 150                 .name = "mif2",
 151                 .group_names = madera_mif2_group_names,
 152                 .func = 0x000
 153         },
 154         {
 155                 .name = "mif3",
 156                 .group_names = madera_mif3_group_names,
 157                 .func = 0x000
 158         },
 159         {
 160                 .name = "dmic3",
 161                 .group_names = madera_dmic3_group_names,
 162                 .func = 0x000
 163         },
 164         {
 165                 .name = "dmic4",
 166                 .group_names = madera_dmic4_group_names,
 167                 .func = 0x000
 168         },
 169         {
 170                 .name = "dmic5",
 171                 .group_names = madera_dmic5_group_names,
 172                 .func = 0x000
 173         },
 174         {
 175                 .name = "dmic6",
 176                 .group_names = madera_dmic6_group_names,
 177                 .func = 0x000
 178         },
 179         {
 180                 .name = "pdmspk1",
 181                 .group_names = madera_spk1_group_names,
 182                 .func = 0x000
 183         },
 184         {
 185                 .name = "pdmspk2",
 186                 .group_names = madera_spk2_group_names,
 187                 .func = 0x000
 188         },
 189         {
 190                 .name = "io",
 191                 .group_names = madera_pin_single_group_names,
 192                 .func = 0x001
 193         },
 194         {
 195                 .name = "dsp-gpio",
 196                 .group_names = madera_pin_single_group_names,
 197                 .func = 0x002
 198         },
 199         {
 200                 .name = "irq1",
 201                 .group_names = madera_pin_single_group_names,
 202                 .func = 0x003
 203         },
 204         {
 205                 .name = "irq2",
 206                 .group_names = madera_pin_single_group_names,
 207                 .func = 0x004
 208         },
 209         {
 210                 .name = "fll1-clk",
 211                 .group_names = madera_pin_single_group_names,
 212                 .func = 0x010
 213         },
 214         {
 215                 .name = "fll2-clk",
 216                 .group_names = madera_pin_single_group_names,
 217                 .func = 0x011
 218         },
 219         {
 220                 .name = "fll3-clk",
 221                 .group_names = madera_pin_single_group_names,
 222                 .func = 0x012
 223         },
 224         {
 225                 .name = "fllao-clk",
 226                 .group_names = madera_pin_single_group_names,
 227                 .func = 0x013
 228         },
 229         {
 230                 .name = "fll1-lock",
 231                 .group_names = madera_pin_single_group_names,
 232                 .func = 0x018
 233         },
 234         {
 235                 .name = "fll2-lock",
 236                 .group_names = madera_pin_single_group_names,
 237                 .func = 0x019
 238         },
 239         {
 240                 .name = "fll3-lock",
 241                 .group_names = madera_pin_single_group_names,
 242                 .func = 0x01a
 243         },
 244         {
 245                 .name = "fllao-lock",
 246                 .group_names = madera_pin_single_group_names,
 247                 .func = 0x01b
 248         },
 249         {
 250                 .name = "opclk",
 251                 .group_names = madera_pin_single_group_names,
 252                 .func = 0x040
 253         },
 254         {
 255                 .name = "opclk-async",
 256                 .group_names = madera_pin_single_group_names,
 257                 .func = 0x041
 258         },
 259         {
 260                 .name = "pwm1",
 261                 .group_names = madera_pin_single_group_names,
 262                 .func = 0x048
 263         },
 264         {
 265                 .name = "pwm2",
 266                 .group_names = madera_pin_single_group_names,
 267                 .func = 0x049
 268         },
 269         {
 270                 .name = "spdif",
 271                 .group_names = madera_pin_single_group_names,
 272                 .func = 0x04c
 273         },
 274         {
 275                 .name = "asrc1-in1-lock",
 276                 .group_names = madera_pin_single_group_names,
 277                 .func = 0x088
 278         },
 279         {
 280                 .name = "asrc1-in2-lock",
 281                 .group_names = madera_pin_single_group_names,
 282                 .func = 0x089
 283         },
 284         {
 285                 .name = "asrc2-in1-lock",
 286                 .group_names = madera_pin_single_group_names,
 287                 .func = 0x08a
 288         },
 289         {
 290                 .name = "asrc2-in2-lock",
 291                 .group_names = madera_pin_single_group_names,
 292                 .func = 0x08b
 293         },
 294         {
 295                 .name = "spkl-short-circuit",
 296                 .group_names = madera_pin_single_group_names,
 297                 .func = 0x0b6
 298         },
 299         {
 300                 .name = "spkr-short-circuit",
 301                 .group_names = madera_pin_single_group_names,
 302                 .func = 0x0b7
 303         },
 304         {
 305                 .name = "spk-shutdown",
 306                 .group_names = madera_pin_single_group_names,
 307                 .func = 0x0e0
 308         },
 309         {
 310                 .name = "spk-overheat-shutdown",
 311                 .group_names = madera_pin_single_group_names,
 312                 .func = 0x0e1
 313         },
 314         {
 315                 .name = "spk-overheat-warn",
 316                 .group_names = madera_pin_single_group_names,
 317                 .func = 0x0e2
 318         },
 319         {
 320                 .name = "timer1-sts",
 321                 .group_names = madera_pin_single_group_names,
 322                 .func = 0x140
 323         },
 324         {
 325                 .name = "timer2-sts",
 326                 .group_names = madera_pin_single_group_names,
 327                 .func = 0x141
 328         },
 329         {
 330                 .name = "timer3-sts",
 331                 .group_names = madera_pin_single_group_names,
 332                 .func = 0x142
 333         },
 334         {
 335                 .name = "timer4-sts",
 336                 .group_names = madera_pin_single_group_names,
 337                 .func = 0x143
 338         },
 339         {
 340                 .name = "timer5-sts",
 341                 .group_names = madera_pin_single_group_names,
 342                 .func = 0x144
 343         },
 344         {
 345                 .name = "timer6-sts",
 346                 .group_names = madera_pin_single_group_names,
 347                 .func = 0x145
 348         },
 349         {
 350                 .name = "timer7-sts",
 351                 .group_names = madera_pin_single_group_names,
 352                 .func = 0x146
 353         },
 354         {
 355                 .name = "timer8-sts",
 356                 .group_names = madera_pin_single_group_names,
 357                 .func = 0x147
 358         },
 359         {
 360                 .name = "log1-fifo-ne",
 361                 .group_names = madera_pin_single_group_names,
 362                 .func = 0x150
 363         },
 364         {
 365                 .name = "log2-fifo-ne",
 366                 .group_names = madera_pin_single_group_names,
 367                 .func = 0x151
 368         },
 369         {
 370                 .name = "log3-fifo-ne",
 371                 .group_names = madera_pin_single_group_names,
 372                 .func = 0x152
 373         },
 374         {
 375                 .name = "log4-fifo-ne",
 376                 .group_names = madera_pin_single_group_names,
 377                 .func = 0x153
 378         },
 379         {
 380                 .name = "log5-fifo-ne",
 381                 .group_names = madera_pin_single_group_names,
 382                 .func = 0x154
 383         },
 384         {
 385                 .name = "log6-fifo-ne",
 386                 .group_names = madera_pin_single_group_names,
 387                 .func = 0x155
 388         },
 389         {
 390                 .name = "log7-fifo-ne",
 391                 .group_names = madera_pin_single_group_names,
 392                 .func = 0x156
 393         },
 394         {
 395                 .name = "log8-fifo-ne",
 396                 .group_names = madera_pin_single_group_names,
 397                 .func = 0x157
 398         },
 399         {
 400                 .name = "aux-pdm-clk",
 401                 .group_names = madera_pin_single_group_names,
 402                 .func = 0x280
 403         },
 404         {
 405                 .name = "aux-pdm-dat",
 406                 .group_names = madera_pin_single_group_names,
 407                 .func = 0x281
 408         },
 409 };
 410
 411 static u16 madera_pin_make_drv_str(struct madera_pin_private *priv,
 412                                       unsigned int milliamps)
 413 {
 414         switch (milliamps) {
 415         case 4:
 416                 return 0;
 417         case 8:
 418                 return 2 << MADERA_GP1_DRV_STR_SHIFT;
 419         default:
 420                 break;
 421         }
 422
 423         dev_warn(priv->dev, "%u mA not a valid drive strength", milliamps);
 424
 425         return 0;
 426 }
 427
 428 static unsigned int madera_pin_unmake_drv_str(struct madera_pin_private *priv,
 429                                               u16 regval)
 430 {
 431         regval = (regval & MADERA_GP1_DRV_STR_MASK) >> MADERA_GP1_DRV_STR_SHIFT;
 432
 433         switch (regval) {
 434         case 0:
 435                 return 4;
 436         case 2:
 437                 return 8;
 438         default:
 439                 return 0;
 440         }
 441 }
 442
 443 static int madera_get_groups_count(struct pinctrl_dev *pctldev)
 444 {
 445         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 446
 447         /* Number of alt function groups plus number of single-pin groups */
 448         return priv->chip->n_pin_groups + priv->chip->n_pins;
 449 }
 450
 451 static const char *madera_get_group_name(struct pinctrl_dev *pctldev,
 452                                          unsigned int selector)
 453 {
 454         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 455
 456         if (selector < priv->chip->n_pin_groups)
 457                 return priv->chip->pin_groups[selector].name;
 458
 459         selector -= priv->chip->n_pin_groups;
 460         return madera_pin_single_group_names[selector];
 461 }
 462
 463 static int madera_get_group_pins(struct pinctrl_dev *pctldev,
 464                                  unsigned int selector,
 465                                  const unsigned int **pins,
 466                                  unsigned int *num_pins)
 467 {
 468         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 469
 470         if (selector < priv->chip->n_pin_groups) {
 471                 *pins = priv->chip->pin_groups[selector].pins;
 472                 *num_pins = priv->chip->pin_groups[selector].n_pins;
 473         } else {
 474                 /* return the dummy group for a single pin */
 475                 selector -= priv->chip->n_pin_groups;
 476                 *pins = &madera_pin_single_group_pins[selector];
 477                 *num_pins = 1;
 478         }
 479         return 0;
 480 }
 481
 482 static void madera_pin_dbg_show_fn(struct madera_pin_private *priv,
 483                                    struct seq_file *s,
 484                                    unsigned int pin, unsigned int fn)
 485 {
 486         const struct madera_pin_chip *chip = priv->chip;
 487         int i, g_pin;
 488
 489         if (fn != 0) {
 490                 for (i = 0; i < ARRAY_SIZE(madera_mux_funcs); ++i) {
 491                         if (madera_mux_funcs[i].func == fn) {
 492                                 seq_printf(s, " FN=%s",
 493                                            madera_mux_funcs[i].name);
 494                                 return;
 495                         }
 496                 }
 497                 return; /* ignore unknown function values */
 498         }
 499
 500         /* alt function */
 501         for (i = 0; i < chip->n_pin_groups; ++i) {
 502                 for (g_pin = 0; g_pin < chip->pin_groups[i].n_pins; ++g_pin) {
 503                         if (chip->pin_groups[i].pins[g_pin] == pin) {
 504                                 seq_printf(s, " FN=%s",
 505                                            chip->pin_groups[i].name);
 506                                 return;
 507                         }
 508                 }
 509         }
 510 }
 511
 512 static void __maybe_unused madera_pin_dbg_show(struct pinctrl_dev *pctldev,
 513                                                struct seq_file *s,
 514                                                unsigned int pin)
 515 {
 516         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 517         unsigned int conf[2];
 518         unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin);
 519         unsigned int fn;
 520         int ret;
 521
 522         ret = regmap_read(priv->madera->regmap, reg, &conf[0]);
 523         if (ret)
 524                 return;
 525
 526         ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]);
 527         if (ret)
 528                 return;
 529
 530         seq_printf(s, "%04x:%04x", conf[0], conf[1]);
 531
 532         fn = (conf[0] & MADERA_GP1_FN_MASK) >> MADERA_GP1_FN_SHIFT;
 533         madera_pin_dbg_show_fn(priv, s, pin, fn);
 534
 535         /* State of direction bit is only relevant if function==1 */
 536         if (fn == 1) {
 537                 if (conf[1] & MADERA_GP1_DIR_MASK)
 538                         seq_puts(s, " IN");
 539                 else
 540                         seq_puts(s, " OUT");
 541         }
 542
 543         if (conf[1] & MADERA_GP1_PU_MASK)
 544                 seq_puts(s, " PU");
 545
 546         if (conf[1] & MADERA_GP1_PD_MASK)
 547                 seq_puts(s, " PD");
 548
 549         if (conf[0] & MADERA_GP1_DB_MASK)
 550                 seq_puts(s, " DB");
 551
 552         if (conf[0] & MADERA_GP1_OP_CFG_MASK)
 553                 seq_puts(s, " OD");
 554         else
 555                 seq_puts(s, " CMOS");
 556
 557         seq_printf(s, " DRV=%umA", madera_pin_unmake_drv_str(priv, conf[1]));
 558
 559         if (conf[0] & MADERA_GP1_IP_CFG_MASK)
 560                 seq_puts(s, " SCHMITT");
 561 }
 562
 563 static const struct pinctrl_ops madera_pin_group_ops = {
 564         .get_groups_count = madera_get_groups_count,
 565         .get_group_name = madera_get_group_name,
 566         .get_group_pins = madera_get_group_pins,
 567 #if IS_ENABLED(CONFIG_OF)
 568         .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
 569         .dt_free_map = pinctrl_utils_free_map,
 570 #endif
 571 #if IS_ENABLED(CONFIG_DEBUG_FS)
 572         .pin_dbg_show = madera_pin_dbg_show,
 573 #endif
 574 };
 575
 576 static int madera_mux_get_funcs_count(struct pinctrl_dev *pctldev)
 577 {
 578         return ARRAY_SIZE(madera_mux_funcs);
 579 }
 580
 581 static const char *madera_mux_get_func_name(struct pinctrl_dev *pctldev,
 582                                             unsigned int selector)
 583 {
 584         return madera_mux_funcs[selector].name;
 585 }
 586
 587 static int madera_mux_get_groups(struct pinctrl_dev *pctldev,
 588                                  unsigned int selector,
 589                                  const char * const **groups,
 590                                  unsigned int * const num_groups)
 591 {
 592         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 593
 594         *groups = madera_mux_funcs[selector].group_names;
 595
 596         if (madera_mux_funcs[selector].func == 0) {
 597                 /* alt func always maps to a single group */
 598                 *num_groups = 1;
 599         } else {
 600                 /* other funcs map to all available gpio pins */
 601                 *num_groups = priv->chip->n_pins;
 602         }
 603
 604         return 0;
 605 }
 606
 607 static int madera_mux_set_mux(struct pinctrl_dev *pctldev,
 608                               unsigned int selector,
 609                               unsigned int group)
 610 {
 611         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 612         struct madera *madera = priv->madera;
 613         const struct madera_pin_groups *pin_group = priv->chip->pin_groups;
 614         unsigned int n_chip_groups = priv->chip->n_pin_groups;
 615         const char *func_name = madera_mux_funcs[selector].name;
 616         unsigned int reg;
 617         int i, ret = 0;
 618
 619         dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n",
 620                 __func__, selector, func_name, group,
 621                 madera_get_group_name(pctldev, group));
 622
 623         if (madera_mux_funcs[selector].func == 0) {
 624                 /* alt func pin assignments are codec-specific */
 625                 for (i = 0; i < n_chip_groups; ++i) {
 626                         if (strcmp(func_name, pin_group->name) == 0)
 627                                 break;
 628
 629                         ++pin_group;
 630                 }
 631
 632                 if (i == n_chip_groups)
 633                         return -EINVAL;
 634
 635                 for (i = 0; i < pin_group->n_pins; ++i) {
 636                         reg = MADERA_GPIO1_CTRL_1 + (2 * pin_group->pins[i]);
 637
 638                         dev_dbg(priv->dev, "%s setting 0x%x func bits to 0\n",
 639                                 __func__, reg);
 640
 641                         ret = regmap_update_bits(madera->regmap, reg,
 642                                                  MADERA_GP1_FN_MASK, 0);
 643                         if (ret)
 644                                 break;
 645
 646                 }
 647         } else {
 648                 /*
 649                  * for other funcs the group will be the gpio number and will
 650                  * be offset by the number of chip-specific functions at the
 651                  * start of the group list
 652                  */
 653                 group -= n_chip_groups;
 654                 reg = MADERA_GPIO1_CTRL_1 + (2 * group);
 655
 656                 dev_dbg(priv->dev, "%s setting 0x%x func bits to 0x%x\n",
 657                         __func__, reg, madera_mux_funcs[selector].func);
 658
 659                 ret = regmap_update_bits(madera->regmap,
 660                                          reg,
 661                                          MADERA_GP1_FN_MASK,
 662                                          madera_mux_funcs[selector].func);
 663         }
 664
 665         if (ret)
 666                 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
 667
 668         return ret;
 669 }
 670
 671 static int madera_gpio_set_direction(struct pinctrl_dev *pctldev,
 672                                      struct pinctrl_gpio_range *range,
 673                                      unsigned int offset,
 674                                      bool input)
 675 {
 676         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 677         struct madera *madera = priv->madera;
 678         unsigned int reg = MADERA_GPIO1_CTRL_2 + (2 * offset);
 679         unsigned int val;
 680         int ret;
 681
 682         if (input)
 683                 val = MADERA_GP1_DIR;
 684         else
 685                 val = 0;
 686
 687         ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_DIR_MASK, val);
 688         if (ret)
 689                 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
 690
 691         return ret;
 692 }
 693
 694 static int madera_gpio_request_enable(struct pinctrl_dev *pctldev,
 695                                       struct pinctrl_gpio_range *range,
 696                                       unsigned int offset)
 697 {
 698         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 699         struct madera *madera = priv->madera;
 700         unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset);
 701         int ret;
 702
 703         /* put the pin into GPIO mode */
 704         ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1);
 705         if (ret)
 706                 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
 707
 708         return ret;
 709 }
 710
 711 static void madera_gpio_disable_free(struct pinctrl_dev *pctldev,
 712                                      struct pinctrl_gpio_range *range,
 713                                      unsigned int offset)
 714 {
 715         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 716         struct madera *madera = priv->madera;
 717         unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset);
 718         int ret;
 719
 720         /* disable GPIO by setting to GPIO IN */
 721         madera_gpio_set_direction(pctldev, range, offset, true);
 722
 723         ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1);
 724         if (ret)
 725                 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);
 726 }
 727
 728 static const struct pinmux_ops madera_pin_mux_ops = {
 729         .get_functions_count = madera_mux_get_funcs_count,
 730         .get_function_name = madera_mux_get_func_name,
 731         .get_function_groups = madera_mux_get_groups,
 732         .set_mux = madera_mux_set_mux,
 733         .gpio_request_enable = madera_gpio_request_enable,
 734         .gpio_disable_free = madera_gpio_disable_free,
 735         .gpio_set_direction = madera_gpio_set_direction,
 736         .strict = true, /* GPIO and other functions are exclusive */
 737 };
 738
 739 static int madera_pin_conf_get(struct pinctrl_dev *pctldev, unsigned int pin,
 740                                unsigned long *config)
 741 {
 742         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 743         unsigned int param = pinconf_to_config_param(*config);
 744         unsigned int result = 0;
 745         unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin);
 746         unsigned int conf[2];
 747         int ret;
 748
 749         ret = regmap_read(priv->madera->regmap, reg, &conf[0]);
 750         if (!ret)
 751                 ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]);
 752
 753         if (ret) {
 754                 dev_err(priv->dev, "Failed to read GP%d conf (%d)\n",
 755                         pin + 1, ret);
 756                 return ret;
 757         }
 758
 759         switch (param) {
 760         case PIN_CONFIG_BIAS_BUS_HOLD:
 761                 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 762                 if (conf[1] == (MADERA_GP1_PU | MADERA_GP1_PD))
 763                         result = 1;
 764                 break;
 765         case PIN_CONFIG_BIAS_DISABLE:
 766                 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 767                 if (!conf[1])
 768                         result = 1;
 769                 break;
 770         case PIN_CONFIG_BIAS_PULL_DOWN:
 771                 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 772                 if (conf[1] == MADERA_GP1_PD_MASK)
 773                         result = 1;
 774                 break;
 775         case PIN_CONFIG_BIAS_PULL_UP:
 776                 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 777                 if (conf[1] == MADERA_GP1_PU_MASK)
 778                         result = 1;
 779                 break;
 780         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 781                 if (conf[0] & MADERA_GP1_OP_CFG_MASK)
 782                         result = 1;
 783                 break;
 784         case PIN_CONFIG_DRIVE_PUSH_PULL:
 785                 if (!(conf[0] & MADERA_GP1_OP_CFG_MASK))
 786                         result = 1;
 787                 break;
 788         case PIN_CONFIG_DRIVE_STRENGTH:
 789                 result = madera_pin_unmake_drv_str(priv, conf[1]);
 790                 break;
 791         case PIN_CONFIG_INPUT_DEBOUNCE:
 792                 if (conf[0] & MADERA_GP1_DB_MASK)
 793                         result = 1;
 794                 break;
 795         case PIN_CONFIG_INPUT_ENABLE:
 796                 if (conf[0] & MADERA_GP1_DIR_MASK)
 797                         result = 1;
 798                 break;
 799         case PIN_CONFIG_INPUT_SCHMITT:
 800         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 801                 if (conf[0] & MADERA_GP1_IP_CFG_MASK)
 802                         result = 1;
 803                 break;
 804         case PIN_CONFIG_OUTPUT:
 805                 if ((conf[1] & MADERA_GP1_DIR_MASK) &&
 806                     (conf[0] & MADERA_GP1_LVL_MASK))
 807                         result = 1;
 808                 break;
 809         default:
 810                 return -ENOTSUPP;
 811         }
 812
 813         *config = pinconf_to_config_packed(param, result);
 814
 815         return 0;
 816 }
 817
 818 static int madera_pin_conf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 819                                unsigned long *configs, unsigned int num_configs)
 820 {
 821         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 822         u16 conf[2] = {0, 0};
 823         u16 mask[2] = {0, 0};
 824         unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin);
 825         unsigned int val;
 826         int ret;
 827
 828         while (num_configs) {
 829                 dev_dbg(priv->dev, "%s config 0x%lx\n", __func__, *configs);
 830
 831                 switch (pinconf_to_config_param(*configs)) {
 832                 case PIN_CONFIG_BIAS_BUS_HOLD:
 833                         mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 834                         conf[1] |= MADERA_GP1_PU | MADERA_GP1_PD;
 835                         break;
 836                 case PIN_CONFIG_BIAS_DISABLE:
 837                         mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 838                         conf[1] &= ~(MADERA_GP1_PU | MADERA_GP1_PD);
 839                         break;
 840                 case PIN_CONFIG_BIAS_PULL_DOWN:
 841                         mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 842                         conf[1] |= MADERA_GP1_PD;
 843                         conf[1] &= ~MADERA_GP1_PU;
 844                         break;
 845                 case PIN_CONFIG_BIAS_PULL_UP:
 846                         mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK;
 847                         conf[1] |= MADERA_GP1_PU;
 848                         conf[1] &= ~MADERA_GP1_PD;
 849                         break;
 850                 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 851                         mask[0] |= MADERA_GP1_OP_CFG_MASK;
 852                         conf[0] |= MADERA_GP1_OP_CFG;
 853                         break;
 854                 case PIN_CONFIG_DRIVE_PUSH_PULL:
 855                         mask[0] |= MADERA_GP1_OP_CFG_MASK;
 856                         conf[0] &= ~MADERA_GP1_OP_CFG;
 857                         break;
 858                 case PIN_CONFIG_DRIVE_STRENGTH:
 859                         val = pinconf_to_config_argument(*configs);
 860                         mask[1] |= MADERA_GP1_DRV_STR_MASK;
 861                         conf[1] &= ~MADERA_GP1_DRV_STR_MASK;
 862                         conf[1] |= madera_pin_make_drv_str(priv, val);
 863                         break;
 864                 case PIN_CONFIG_INPUT_DEBOUNCE:
 865                         mask[0] |= MADERA_GP1_DB_MASK;
 866
 867                         /*
 868                          * we can't configure debounce time per-pin so value
 869                          * is just a flag
 870                          */
 871                         val = pinconf_to_config_argument(*configs);
 872                         if (val)
 873                                 conf[0] |= MADERA_GP1_DB;
 874                         else
 875                                 conf[0] &= ~MADERA_GP1_DB;
 876                         break;
 877                 case PIN_CONFIG_INPUT_ENABLE:
 878                         val = pinconf_to_config_argument(*configs);
 879                         mask[1] |= MADERA_GP1_DIR_MASK;
 880                         if (val)
 881                                 conf[1] |= MADERA_GP1_DIR;
 882                         else
 883                                 conf[1] &= ~MADERA_GP1_DIR;
 884                         break;
 885                 case PIN_CONFIG_INPUT_SCHMITT:
 886                         val = pinconf_to_config_argument(*configs);
 887                         mask[0] |= MADERA_GP1_IP_CFG;
 888                         if (val)
 889                                 conf[0] |= MADERA_GP1_IP_CFG;
 890                         else
 891                                 conf[0] &= ~MADERA_GP1_IP_CFG;
 892
 893                         mask[1] |= MADERA_GP1_DIR_MASK;
 894                         conf[1] |= MADERA_GP1_DIR;
 895                         break;
 896                 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 897                         mask[0] |= MADERA_GP1_IP_CFG;
 898                         conf[0] |= MADERA_GP1_IP_CFG;
 899                         mask[1] |= MADERA_GP1_DIR_MASK;
 900                         conf[1] |= MADERA_GP1_DIR;
 901                         break;
 902                 case PIN_CONFIG_OUTPUT:
 903                         val = pinconf_to_config_argument(*configs);
 904                         mask[0] |= MADERA_GP1_LVL_MASK;
 905                         if (val)
 906                                 conf[0] |= MADERA_GP1_LVL;
 907                         else
 908                                 conf[0] &= ~MADERA_GP1_LVL;
 909
 910                         mask[1] |= MADERA_GP1_DIR_MASK;
 911                         conf[1] &= ~MADERA_GP1_DIR;
 912                         break;
 913                 default:
 914                         return -ENOTSUPP;
 915                 }
 916
 917                 ++configs;
 918                 --num_configs;
 919         }
 920
 921         dev_dbg(priv->dev,
 922                 "%s gpio%d 0x%x:0x%x 0x%x:0x%x\n",
 923                 __func__, pin + 1, reg, conf[0], reg + 1, conf[1]);
 924
 925         ret = regmap_update_bits(priv->madera->regmap, reg, mask[0], conf[0]);
 926         if (ret)
 927                 goto err;
 928
 929         ++reg;
 930         ret = regmap_update_bits(priv->madera->regmap, reg, mask[1], conf[1]);
 931         if (ret)
 932                 goto err;
 933
 934         return 0;
 935
 936 err:
 937         dev_err(priv->dev,
 938                 "Failed to write GPIO%d conf (%d) reg 0x%x\n",
 939                 pin + 1, ret, reg);
 940
 941         return ret;
 942 }
 943
 944 static int madera_pin_conf_group_set(struct pinctrl_dev *pctldev,
 945                                      unsigned int selector,
 946                                      unsigned long *configs,
 947                                      unsigned int num_configs)
 948 {
 949         struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev);
 950         const struct madera_pin_groups *pin_group;
 951         unsigned int n_groups = priv->chip->n_pin_groups;
 952         int i, ret;
 953
 954         dev_dbg(priv->dev, "%s setting group %s\n", __func__,
 955                 madera_get_group_name(pctldev, selector));
 956
 957         if (selector >= n_groups) {
 958                 /* group is a single pin, convert to pin number and set */
 959                 return madera_pin_conf_set(pctldev,
 960                                            selector - n_groups,
 961                                            configs,
 962                                            num_configs);
 963         } else {
 964                 pin_group = &priv->chip->pin_groups[selector];
 965
 966                 for (i = 0; i < pin_group->n_pins; ++i) {
 967                         ret = madera_pin_conf_set(pctldev,
 968                                                   pin_group->pins[i],
 969                                                   configs,
 970                                                   num_configs);
 971                         if (ret)
 972                                 return ret;
 973                 }
 974         }
 975
 976         return 0;
 977 }
 978
 979 static const struct pinconf_ops madera_pin_conf_ops = {
 980         .is_generic = true,
 981         .pin_config_get = madera_pin_conf_get,
 982         .pin_config_set = madera_pin_conf_set,
 983         .pin_config_group_set = madera_pin_conf_group_set,
 984 };
 985
 986 static struct pinctrl_desc madera_pin_desc = {
 987         .name = "madera-pinctrl",
 988         .pins = madera_pins,
 989         .pctlops = &madera_pin_group_ops,
 990         .pmxops = &madera_pin_mux_ops,
 991         .confops = &madera_pin_conf_ops,
 992         .owner = THIS_MODULE,
 993 };
 994
 995 static int madera_pin_probe(struct platform_device *pdev)
 996 {
 997         struct madera *madera = dev_get_drvdata(pdev->dev.parent);
 998         const struct madera_pdata *pdata = &madera->pdata;
 999         struct madera_pin_private *priv;
1000         int ret;
1001
1002         BUILD_BUG_ON(ARRAY_SIZE(madera_pin_single_group_names) !=
1003                      ARRAY_SIZE(madera_pin_single_group_pins));
1004
1005         dev_dbg(&pdev->dev, "%s\n", __func__);
1006
1007         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1008         if (!priv)
1009                 return -ENOMEM;
1010
1011         priv->dev = &pdev->dev;
1012         priv->madera = madera;
1013         pdev->dev.of_node = madera->dev->of_node;
1014
1015         switch (madera->type) {
1016         case CS47L15:
1017                 if (IS_ENABLED(CONFIG_PINCTRL_CS47L15))
1018                         priv->chip = &cs47l15_pin_chip;
1019                 break;
1020         case CS47L35:
1021                 if (IS_ENABLED(CONFIG_PINCTRL_CS47L35))
1022                         priv->chip = &cs47l35_pin_chip;
1023                 break;
1024         case CS47L85:
1025         case WM1840:
1026                 if (IS_ENABLED(CONFIG_PINCTRL_CS47L85))
1027                         priv->chip = &cs47l85_pin_chip;
1028                 break;
1029         case CS47L90:
1030         case CS47L91:
1031                 if (IS_ENABLED(CONFIG_PINCTRL_CS47L90))
1032                         priv->chip = &cs47l90_pin_chip;
1033                 break;
1034         case CS42L92:
1035         case CS47L92:
1036         case CS47L93:
1037                 if (IS_ENABLED(CONFIG_PINCTRL_CS47L92))
1038                         priv->chip = &cs47l92_pin_chip;
1039                 break;
1040         default:
1041                 break;
1042         }
1043
1044         if (!priv->chip)
1045                 return -ENODEV;
1046
1047         madera_pin_desc.npins = priv->chip->n_pins;
1048
1049         ret = devm_pinctrl_register_and_init(&pdev->dev,
1050                                              &madera_pin_desc,
1051                                              priv,
1052                                              &priv->pctl);
1053         if (ret) {
1054                 dev_err(priv->dev, "Failed pinctrl register (%d)\n", ret);
1055                 return ret;
1056         }
1057
1058         /* if the configuration is provided through pdata, apply it */
1059         if (pdata->gpio_configs) {
1060                 ret = pinctrl_register_mappings(pdata->gpio_configs,
1061                                                 pdata->n_gpio_configs);
1062                 if (ret) {
1063                         dev_err(priv->dev,
1064                                 "Failed to register pdata mappings (%d)\n",
1065                                 ret);
1066                         return ret;
1067                 }
1068         }
1069
1070         ret = pinctrl_enable(priv->pctl);
1071         if (ret) {
1072                 dev_err(priv->dev, "Failed to enable pinctrl (%d)\n", ret);
1073                 return ret;
1074         }
1075
1076         platform_set_drvdata(pdev, priv);
1077
1078         dev_dbg(priv->dev, "pinctrl probed ok\n");
1079
1080         return 0;
1081 }
1082
1083 static int madera_pin_remove(struct platform_device *pdev)
1084 {
1085         struct madera_pin_private *priv = platform_get_drvdata(pdev);
1086
1087         if (priv->madera->pdata.gpio_configs)
1088                 pinctrl_unregister_mappings(priv->madera->pdata.gpio_configs);
1089
1090         return 0;
1091 }
1092
1093 static struct platform_driver madera_pin_driver = {
1094         .probe = madera_pin_probe,
1095         .remove = madera_pin_remove,
1096         .driver = {
1097                 .name = "madera-pinctrl",
1098         },
1099 };
1100
1101 module_platform_driver(madera_pin_driver);
1102
1103 MODULE_DESCRIPTION("Madera pinctrl driver");
1104 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
1105 MODULE_LICENSE("GPL v2");