drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c

   1 /*
   2  * Copyright (c) 2015, Sony Mobile Communications AB.
   3  * Copyright (c) 2013, The Linux Foundation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 and
   7  * only version 2 as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pinctrl/pinctrl.h>
  18 #include <linux/pinctrl/pinmux.h>
  19 #include <linux/pinctrl/pinconf.h>
  20 #include <linux/pinctrl/pinconf-generic.h>
  21 #include <linux/slab.h>
  22 #include <linux/regmap.h>
  23 #include <linux/gpio.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/of_device.h>
  26
  27 #include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
  28
  29 #include "../core.h"
  30 #include "../pinctrl-utils.h"
  31
  32 /* MPP registers */
  33 #define SSBI_REG_ADDR_MPP_BASE          0x50
  34 #define SSBI_REG_ADDR_MPP(n)            (SSBI_REG_ADDR_MPP_BASE + n)
  35
  36 /* MPP Type: type */
  37 #define PM8XXX_MPP_TYPE_D_INPUT         0
  38 #define PM8XXX_MPP_TYPE_D_OUTPUT        1
  39 #define PM8XXX_MPP_TYPE_D_BI_DIR        2
  40 #define PM8XXX_MPP_TYPE_A_INPUT         3
  41 #define PM8XXX_MPP_TYPE_A_OUTPUT        4
  42 #define PM8XXX_MPP_TYPE_SINK            5
  43 #define PM8XXX_MPP_TYPE_DTEST_SINK      6
  44 #define PM8XXX_MPP_TYPE_DTEST_OUTPUT    7
  45
  46 /* Digital Input: control */
  47 #define PM8XXX_MPP_DIN_TO_INT           0
  48 #define PM8XXX_MPP_DIN_TO_DBUS1         1
  49 #define PM8XXX_MPP_DIN_TO_DBUS2         2
  50 #define PM8XXX_MPP_DIN_TO_DBUS3         3
  51
  52 /* Digital Output: control */
  53 #define PM8XXX_MPP_DOUT_CTRL_LOW        0
  54 #define PM8XXX_MPP_DOUT_CTRL_HIGH       1
  55 #define PM8XXX_MPP_DOUT_CTRL_MPP        2
  56 #define PM8XXX_MPP_DOUT_CTRL_INV_MPP    3
  57
  58 /* Bidirectional: control */
  59 #define PM8XXX_MPP_BI_PULLUP_1KOHM      0
  60 #define PM8XXX_MPP_BI_PULLUP_OPEN       1
  61 #define PM8XXX_MPP_BI_PULLUP_10KOHM     2
  62 #define PM8XXX_MPP_BI_PULLUP_30KOHM     3
  63
  64 /* Analog Output: control */
  65 #define PM8XXX_MPP_AOUT_CTRL_DISABLE            0
  66 #define PM8XXX_MPP_AOUT_CTRL_ENABLE             1
  67 #define PM8XXX_MPP_AOUT_CTRL_MPP_HIGH_EN        2
  68 #define PM8XXX_MPP_AOUT_CTRL_MPP_LOW_EN         3
  69
  70 /* Current Sink: control */
  71 #define PM8XXX_MPP_CS_CTRL_DISABLE      0
  72 #define PM8XXX_MPP_CS_CTRL_ENABLE       1
  73 #define PM8XXX_MPP_CS_CTRL_MPP_HIGH_EN  2
  74 #define PM8XXX_MPP_CS_CTRL_MPP_LOW_EN   3
  75
  76 /* DTEST Current Sink: control */
  77 #define PM8XXX_MPP_DTEST_CS_CTRL_EN1    0
  78 #define PM8XXX_MPP_DTEST_CS_CTRL_EN2    1
  79 #define PM8XXX_MPP_DTEST_CS_CTRL_EN3    2
  80 #define PM8XXX_MPP_DTEST_CS_CTRL_EN4    3
  81
  82 /* DTEST Digital Output: control */
  83 #define PM8XXX_MPP_DTEST_DBUS1          0
  84 #define PM8XXX_MPP_DTEST_DBUS2          1
  85 #define PM8XXX_MPP_DTEST_DBUS3          2
  86 #define PM8XXX_MPP_DTEST_DBUS4          3
  87
  88 /* custom pinconf parameters */
  89 #define PM8XXX_CONFIG_AMUX              (PIN_CONFIG_END + 1)
  90 #define PM8XXX_CONFIG_DTEST_SELECTOR    (PIN_CONFIG_END + 2)
  91 #define PM8XXX_CONFIG_ALEVEL            (PIN_CONFIG_END + 3)
  92 #define PM8XXX_CONFIG_PAIRED            (PIN_CONFIG_END + 4)
  93
  94 /**
  95  * struct pm8xxx_pin_data - dynamic configuration for a pin
  96  * @reg:                address of the control register
  97  * @irq:                IRQ from the PMIC interrupt controller
  98  * @mode:               operating mode for the pin (digital, analog or current sink)
  99  * @input:              pin is input
 100  * @output:             pin is output
 101  * @high_z:             pin is floating
 102  * @paired:             mpp operates in paired mode
 103  * @output_value:       logical output value of the mpp
 104  * @power_source:       selected power source
 105  * @dtest:              DTEST route selector
 106  * @amux:               input muxing in analog mode
 107  * @aout_level:         selector of the output in analog mode
 108  * @drive_strength:     drive strength of the current sink
 109  * @pullup:             pull up value, when in digital bidirectional mode
 110  */
 111 struct pm8xxx_pin_data {
 112         unsigned reg;
 113         int irq;
 114
 115         u8 mode;
 116
 117         bool input;
 118         bool output;
 119         bool high_z;
 120         bool paired;
 121         bool output_value;
 122
 123         u8 power_source;
 124         u8 dtest;
 125         u8 amux;
 126         u8 aout_level;
 127         u8 drive_strength;
 128         unsigned pullup;
 129 };
 130
 131 struct pm8xxx_mpp {
 132         struct device *dev;
 133         struct regmap *regmap;
 134         struct pinctrl_dev *pctrl;
 135         struct gpio_chip chip;
 136
 137         struct pinctrl_desc desc;
 138         unsigned npins;
 139 };
 140
 141 static const struct pinconf_generic_params pm8xxx_mpp_bindings[] = {
 142         {"qcom,amux-route",     PM8XXX_CONFIG_AMUX,             0},
 143         {"qcom,analog-level",   PM8XXX_CONFIG_ALEVEL,           0},
 144         {"qcom,dtest",          PM8XXX_CONFIG_DTEST_SELECTOR,   0},
 145         {"qcom,paired",         PM8XXX_CONFIG_PAIRED,           0},
 146 };
 147
 148 #ifdef CONFIG_DEBUG_FS
 149 static const struct pin_config_item pm8xxx_conf_items[] = {
 150         PCONFDUMP(PM8XXX_CONFIG_AMUX, "analog mux", NULL, true),
 151         PCONFDUMP(PM8XXX_CONFIG_ALEVEL, "analog level", NULL, true),
 152         PCONFDUMP(PM8XXX_CONFIG_DTEST_SELECTOR, "dtest", NULL, true),
 153         PCONFDUMP(PM8XXX_CONFIG_PAIRED, "paired", NULL, false),
 154 };
 155 #endif
 156
 157 #define PM8XXX_MAX_MPPS 12
 158 static const char * const pm8xxx_groups[PM8XXX_MAX_MPPS] = {
 159         "mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
 160         "mpp9", "mpp10", "mpp11", "mpp12",
 161 };
 162
 163 #define PM8XXX_MPP_DIGITAL      0
 164 #define PM8XXX_MPP_ANALOG       1
 165 #define PM8XXX_MPP_SINK         2
 166
 167 static const char * const pm8xxx_mpp_functions[] = {
 168         "digital", "analog", "sink",
 169 };
 170
 171 static int pm8xxx_mpp_update(struct pm8xxx_mpp *pctrl,
 172                              struct pm8xxx_pin_data *pin)
 173 {
 174         unsigned level;
 175         unsigned ctrl;
 176         unsigned type;
 177         int ret;
 178         u8 val;
 179
 180         switch (pin->mode) {
 181         case PM8XXX_MPP_DIGITAL:
 182                 if (pin->dtest) {
 183                         type = PM8XXX_MPP_TYPE_DTEST_OUTPUT;
 184                         ctrl = pin->dtest - 1;
 185                 } else if (pin->input && pin->output) {
 186                         type = PM8XXX_MPP_TYPE_D_BI_DIR;
 187                         if (pin->high_z)
 188                                 ctrl = PM8XXX_MPP_BI_PULLUP_OPEN;
 189                         else if (pin->pullup == 600)
 190                                 ctrl = PM8XXX_MPP_BI_PULLUP_1KOHM;
 191                         else if (pin->pullup == 10000)
 192                                 ctrl = PM8XXX_MPP_BI_PULLUP_10KOHM;
 193                         else
 194                                 ctrl = PM8XXX_MPP_BI_PULLUP_30KOHM;
 195                 } else if (pin->input) {
 196                         type = PM8XXX_MPP_TYPE_D_INPUT;
 197                         if (pin->dtest)
 198                                 ctrl = pin->dtest;
 199                         else
 200                                 ctrl = PM8XXX_MPP_DIN_TO_INT;
 201                 } else {
 202                         type = PM8XXX_MPP_TYPE_D_OUTPUT;
 203                         ctrl = !!pin->output_value;
 204                         if (pin->paired)
 205                                 ctrl |= BIT(1);
 206                 }
 207
 208                 level = pin->power_source;
 209                 break;
 210         case PM8XXX_MPP_ANALOG:
 211                 if (pin->output) {
 212                         type = PM8XXX_MPP_TYPE_A_OUTPUT;
 213                         level = pin->aout_level;
 214                         ctrl = pin->output_value;
 215                         if (pin->paired)
 216                                 ctrl |= BIT(1);
 217                 } else {
 218                         type = PM8XXX_MPP_TYPE_A_INPUT;
 219                         level = pin->amux;
 220                         ctrl = 0;
 221                 }
 222                 break;
 223         case PM8XXX_MPP_SINK:
 224                 level = (pin->drive_strength / 5) - 1;
 225                 if (pin->dtest) {
 226                         type = PM8XXX_MPP_TYPE_DTEST_SINK;
 227                         ctrl = pin->dtest - 1;
 228                 } else {
 229                         type = PM8XXX_MPP_TYPE_SINK;
 230                         ctrl = pin->output_value;
 231                         if (pin->paired)
 232                                 ctrl |= BIT(1);
 233                 }
 234                 break;
 235         default:
 236                 return -EINVAL;
 237         }
 238
 239         val = type << 5 | level << 2 | ctrl;
 240         ret = regmap_write(pctrl->regmap, pin->reg, val);
 241         if (ret)
 242                 dev_err(pctrl->dev, "failed to write register\n");
 243
 244         return ret;
 245 }
 246
 247 static int pm8xxx_get_groups_count(struct pinctrl_dev *pctldev)
 248 {
 249         struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
 250
 251         return pctrl->npins;
 252 }
 253
 254 static const char *pm8xxx_get_group_name(struct pinctrl_dev *pctldev,
 255                                          unsigned group)
 256 {
 257         return pm8xxx_groups[group];
 258 }
 259
 260
 261 static int pm8xxx_get_group_pins(struct pinctrl_dev *pctldev,
 262                                  unsigned group,
 263                                  const unsigned **pins,
 264                                  unsigned *num_pins)
 265 {
 266         struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
 267
 268         *pins = &pctrl->desc.pins[group].number;
 269         *num_pins = 1;
 270
 271         return 0;
 272 }
 273
 274 static const struct pinctrl_ops pm8xxx_pinctrl_ops = {
 275         .get_groups_count       = pm8xxx_get_groups_count,
 276         .get_group_name         = pm8xxx_get_group_name,
 277         .get_group_pins         = pm8xxx_get_group_pins,
 278         .dt_node_to_map         = pinconf_generic_dt_node_to_map_group,
 279         .dt_free_map            = pinctrl_utils_dt_free_map,
 280 };
 281
 282 static int pm8xxx_get_functions_count(struct pinctrl_dev *pctldev)
 283 {
 284         return ARRAY_SIZE(pm8xxx_mpp_functions);
 285 }
 286
 287 static const char *pm8xxx_get_function_name(struct pinctrl_dev *pctldev,
 288                                             unsigned function)
 289 {
 290         return pm8xxx_mpp_functions[function];
 291 }
 292
 293 static int pm8xxx_get_function_groups(struct pinctrl_dev *pctldev,
 294                                       unsigned function,
 295                                       const char * const **groups,
 296                                       unsigned * const num_groups)
 297 {
 298         struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
 299
 300         *groups = pm8xxx_groups;
 301         *num_groups = pctrl->npins;
 302         return 0;
 303 }
 304
 305 static int pm8xxx_pinmux_set_mux(struct pinctrl_dev *pctldev,
 306                                  unsigned function,
 307                                  unsigned group)
 308 {
 309         struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
 310         struct pm8xxx_pin_data *pin = pctrl->desc.pins[group].drv_data;
 311
 312         pin->mode = function;
 313         pm8xxx_mpp_update(pctrl, pin);
 314
 315         return 0;
 316 }
 317
 318 static const struct pinmux_ops pm8xxx_pinmux_ops = {
 319         .get_functions_count    = pm8xxx_get_functions_count,
 320         .get_function_name      = pm8xxx_get_function_name,
 321         .get_function_groups    = pm8xxx_get_function_groups,
 322         .set_mux                = pm8xxx_pinmux_set_mux,
 323 };
 324
 325 static int pm8xxx_pin_config_get(struct pinctrl_dev *pctldev,
 326                                  unsigned int offset,
 327                                  unsigned long *config)
 328 {
 329         struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
 330         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 331         unsigned param = pinconf_to_config_param(*config);
 332         unsigned arg;
 333
 334         switch (param) {
 335         case PIN_CONFIG_BIAS_PULL_UP:
 336                 arg = pin->pullup;
 337                 break;
 338         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
 339                 arg = pin->high_z;
 340                 break;
 341         case PIN_CONFIG_INPUT_ENABLE:
 342                 arg = pin->input;
 343                 break;
 344         case PIN_CONFIG_OUTPUT:
 345                 arg = pin->output_value;
 346                 break;
 347         case PIN_CONFIG_POWER_SOURCE:
 348                 arg = pin->power_source;
 349                 break;
 350         case PIN_CONFIG_DRIVE_STRENGTH:
 351                 arg = pin->drive_strength;
 352                 break;
 353         case PM8XXX_CONFIG_DTEST_SELECTOR:
 354                 arg = pin->dtest;
 355                 break;
 356         case PM8XXX_CONFIG_AMUX:
 357                 arg = pin->amux;
 358                 break;
 359         case PM8XXX_CONFIG_ALEVEL:
 360                 arg = pin->aout_level;
 361                 break;
 362         case PM8XXX_CONFIG_PAIRED:
 363                 arg = pin->paired;
 364                 break;
 365         default:
 366                 return -EINVAL;
 367         }
 368
 369         *config = pinconf_to_config_packed(param, arg);
 370
 371         return 0;
 372 }
 373
 374 static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev,
 375                                  unsigned int offset,
 376                                  unsigned long *configs,
 377                                  unsigned num_configs)
 378 {
 379         struct pm8xxx_mpp *pctrl = pinctrl_dev_get_drvdata(pctldev);
 380         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 381         unsigned param;
 382         unsigned arg;
 383         unsigned i;
 384
 385         for (i = 0; i < num_configs; i++) {
 386                 param = pinconf_to_config_param(configs[i]);
 387                 arg = pinconf_to_config_argument(configs[i]);
 388
 389                 switch (param) {
 390                 case PIN_CONFIG_BIAS_PULL_UP:
 391                         pin->pullup = arg;
 392                         break;
 393                 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
 394                         pin->high_z = true;
 395                         break;
 396                 case PIN_CONFIG_INPUT_ENABLE:
 397                         pin->input = true;
 398                         break;
 399                 case PIN_CONFIG_OUTPUT:
 400                         pin->output = true;
 401                         pin->output_value = !!arg;
 402                         break;
 403                 case PIN_CONFIG_POWER_SOURCE:
 404                         pin->power_source = arg;
 405                         break;
 406                 case PIN_CONFIG_DRIVE_STRENGTH:
 407                         pin->drive_strength = arg;
 408                         break;
 409                 case PM8XXX_CONFIG_DTEST_SELECTOR:
 410                         pin->dtest = arg;
 411                         break;
 412                 case PM8XXX_CONFIG_AMUX:
 413                         pin->amux = arg;
 414                         break;
 415                 case PM8XXX_CONFIG_ALEVEL:
 416                         pin->aout_level = arg;
 417                         break;
 418                 case PM8XXX_CONFIG_PAIRED:
 419                         pin->paired = !!arg;
 420                         break;
 421                 default:
 422                         dev_err(pctrl->dev,
 423                                 "unsupported config parameter: %x\n",
 424                                 param);
 425                         return -EINVAL;
 426                 }
 427         }
 428
 429         pm8xxx_mpp_update(pctrl, pin);
 430
 431         return 0;
 432 }
 433
 434 static const struct pinconf_ops pm8xxx_pinconf_ops = {
 435         .is_generic = true,
 436         .pin_config_group_get = pm8xxx_pin_config_get,
 437         .pin_config_group_set = pm8xxx_pin_config_set,
 438 };
 439
 440 static struct pinctrl_desc pm8xxx_pinctrl_desc = {
 441         .name = "pm8xxx_mpp",
 442         .pctlops = &pm8xxx_pinctrl_ops,
 443         .pmxops = &pm8xxx_pinmux_ops,
 444         .confops = &pm8xxx_pinconf_ops,
 445         .owner = THIS_MODULE,
 446 };
 447
 448 static int pm8xxx_mpp_direction_input(struct gpio_chip *chip,
 449                                        unsigned offset)
 450 {
 451         struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
 452         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 453
 454         switch (pin->mode) {
 455         case PM8XXX_MPP_DIGITAL:
 456                 pin->input = true;
 457                 break;
 458         case PM8XXX_MPP_ANALOG:
 459                 pin->input = true;
 460                 pin->output = true;
 461                 break;
 462         case PM8XXX_MPP_SINK:
 463                 return -EINVAL;
 464         }
 465
 466         pm8xxx_mpp_update(pctrl, pin);
 467
 468         return 0;
 469 }
 470
 471 static int pm8xxx_mpp_direction_output(struct gpio_chip *chip,
 472                                         unsigned offset,
 473                                         int value)
 474 {
 475         struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
 476         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 477
 478         switch (pin->mode) {
 479         case PM8XXX_MPP_DIGITAL:
 480                 pin->output = true;
 481                 break;
 482         case PM8XXX_MPP_ANALOG:
 483                 pin->input = false;
 484                 pin->output = true;
 485                 break;
 486         case PM8XXX_MPP_SINK:
 487                 pin->input = false;
 488                 pin->output = true;
 489                 break;
 490         }
 491
 492         pm8xxx_mpp_update(pctrl, pin);
 493
 494         return 0;
 495 }
 496
 497 static int pm8xxx_mpp_get(struct gpio_chip *chip, unsigned offset)
 498 {
 499         struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
 500         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 501         bool state;
 502         int ret;
 503
 504         if (!pin->input)
 505                 return pin->output_value;
 506
 507         ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state);
 508         if (!ret)
 509                 ret = !!state;
 510
 511         return ret;
 512 }
 513
 514 static void pm8xxx_mpp_set(struct gpio_chip *chip, unsigned offset, int value)
 515 {
 516         struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
 517         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 518
 519         pin->output_value = !!value;
 520
 521         pm8xxx_mpp_update(pctrl, pin);
 522 }
 523
 524 static int pm8xxx_mpp_of_xlate(struct gpio_chip *chip,
 525                                 const struct of_phandle_args *gpio_desc,
 526                                 u32 *flags)
 527 {
 528         if (chip->of_gpio_n_cells < 2)
 529                 return -EINVAL;
 530
 531         if (flags)
 532                 *flags = gpio_desc->args[1];
 533
 534         return gpio_desc->args[0] - 1;
 535 }
 536
 537
 538 static int pm8xxx_mpp_to_irq(struct gpio_chip *chip, unsigned offset)
 539 {
 540         struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
 541         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 542
 543         return pin->irq;
 544 }
 545
 546 #ifdef CONFIG_DEBUG_FS
 547 #include <linux/seq_file.h>
 548
 549 static void pm8xxx_mpp_dbg_show_one(struct seq_file *s,
 550                                   struct pinctrl_dev *pctldev,
 551                                   struct gpio_chip *chip,
 552                                   unsigned offset,
 553                                   unsigned gpio)
 554 {
 555         struct pm8xxx_mpp *pctrl = container_of(chip, struct pm8xxx_mpp, chip);
 556         struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 557
 558         static const char * const aout_lvls[] = {
 559                 "1v25", "1v25_2", "0v625", "0v3125", "mpp", "abus1", "abus2",
 560                 "abus3"
 561         };
 562
 563         static const char * const amuxs[] = {
 564                 "amux5", "amux6", "amux7", "amux8", "amux9", "abus1", "abus2",
 565                 "abus3",
 566         };
 567
 568         seq_printf(s, " mpp%-2d:", offset + 1);
 569
 570         switch (pin->mode) {
 571         case PM8XXX_MPP_DIGITAL:
 572                 seq_puts(s, " digital ");
 573                 if (pin->dtest) {
 574                         seq_printf(s, "dtest%d\n", pin->dtest);
 575                 } else if (pin->input && pin->output) {
 576                         if (pin->high_z)
 577                                 seq_puts(s, "bi-dir high-z");
 578                         else
 579                                 seq_printf(s, "bi-dir %dOhm", pin->pullup);
 580                 } else if (pin->input) {
 581                         if (pin->dtest)
 582                                 seq_printf(s, "in dtest%d", pin->dtest);
 583                         else
 584                                 seq_puts(s, "in gpio");
 585                 } else if (pin->output) {
 586                         seq_puts(s, "out ");
 587
 588                         if (!pin->paired) {
 589                                 seq_puts(s, pin->output_value ?
 590                                          "high" : "low");
 591                         } else {
 592                                 seq_puts(s, pin->output_value ?
 593                                          "inverted" : "follow");
 594                         }
 595                 }
 596                 break;
 597         case PM8XXX_MPP_ANALOG:
 598                 seq_puts(s, " analog ");
 599                 if (pin->output) {
 600                         seq_printf(s, "out %s ", aout_lvls[pin->aout_level]);
 601                         if (!pin->paired) {
 602                                 seq_puts(s, pin->output_value ?
 603                                          "high" : "low");
 604                         } else {
 605                                 seq_puts(s, pin->output_value ?
 606                                          "inverted" : "follow");
 607                         }
 608                 } else {
 609                         seq_printf(s, "input mux %s", amuxs[pin->amux]);
 610                 }
 611                 break;
 612         case PM8XXX_MPP_SINK:
 613                 seq_printf(s, " sink %dmA ", pin->drive_strength);
 614                 if (pin->dtest) {
 615                         seq_printf(s, "dtest%d", pin->dtest);
 616                 } else {
 617                         if (!pin->paired) {
 618                                 seq_puts(s, pin->output_value ?
 619                                          "high" : "low");
 620                         } else {
 621                                 seq_puts(s, pin->output_value ?
 622                                          "inverted" : "follow");
 623                         }
 624                 }
 625                 break;
 626         }
 627
 628 }
 629
 630 static void pm8xxx_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 631 {
 632         unsigned gpio = chip->base;
 633         unsigned i;
 634
 635         for (i = 0; i < chip->ngpio; i++, gpio++) {
 636                 pm8xxx_mpp_dbg_show_one(s, NULL, chip, i, gpio);
 637                 seq_puts(s, "\n");
 638         }
 639 }
 640
 641 #else
 642 #define pm8xxx_mpp_dbg_show NULL
 643 #endif
 644
 645 static struct gpio_chip pm8xxx_mpp_template = {
 646         .direction_input = pm8xxx_mpp_direction_input,
 647         .direction_output = pm8xxx_mpp_direction_output,
 648         .get = pm8xxx_mpp_get,
 649         .set = pm8xxx_mpp_set,
 650         .of_xlate = pm8xxx_mpp_of_xlate,
 651         .to_irq = pm8xxx_mpp_to_irq,
 652         .dbg_show = pm8xxx_mpp_dbg_show,
 653         .owner = THIS_MODULE,
 654 };
 655
 656 static int pm8xxx_pin_populate(struct pm8xxx_mpp *pctrl,
 657                                struct pm8xxx_pin_data *pin)
 658 {
 659         unsigned int val;
 660         unsigned level;
 661         unsigned ctrl;
 662         unsigned type;
 663         int ret;
 664
 665         ret = regmap_read(pctrl->regmap, pin->reg, &val);
 666         if (ret) {
 667                 dev_err(pctrl->dev, "failed to read register\n");
 668                 return ret;
 669         }
 670
 671         type = (val >> 5) & 7;
 672         level = (val >> 2) & 7;
 673         ctrl = (val) & 3;
 674
 675         switch (type) {
 676         case PM8XXX_MPP_TYPE_D_INPUT:
 677                 pin->mode = PM8XXX_MPP_DIGITAL;
 678                 pin->input = true;
 679                 pin->power_source = level;
 680                 pin->dtest = ctrl;
 681                 break;
 682         case PM8XXX_MPP_TYPE_D_OUTPUT:
 683                 pin->mode = PM8XXX_MPP_DIGITAL;
 684                 pin->output = true;
 685                 pin->power_source = level;
 686                 pin->output_value = !!(ctrl & BIT(0));
 687                 pin->paired = !!(ctrl & BIT(1));
 688                 break;
 689         case PM8XXX_MPP_TYPE_D_BI_DIR:
 690                 pin->mode = PM8XXX_MPP_DIGITAL;
 691                 pin->input = true;
 692                 pin->output = true;
 693                 pin->power_source = level;
 694                 switch (ctrl) {
 695                 case PM8XXX_MPP_BI_PULLUP_1KOHM:
 696                         pin->pullup = 600;
 697                         break;
 698                 case PM8XXX_MPP_BI_PULLUP_OPEN:
 699                         pin->high_z = true;
 700                         break;
 701                 case PM8XXX_MPP_BI_PULLUP_10KOHM:
 702                         pin->pullup = 10000;
 703                         break;
 704                 case PM8XXX_MPP_BI_PULLUP_30KOHM:
 705                         pin->pullup = 30000;
 706                         break;
 707                 }
 708                 break;
 709         case PM8XXX_MPP_TYPE_A_INPUT:
 710                 pin->mode = PM8XXX_MPP_ANALOG;
 711                 pin->input = true;
 712                 pin->amux = level;
 713                 break;
 714         case PM8XXX_MPP_TYPE_A_OUTPUT:
 715                 pin->mode = PM8XXX_MPP_ANALOG;
 716                 pin->output = true;
 717                 pin->aout_level = level;
 718                 pin->output_value = !!(ctrl & BIT(0));
 719                 pin->paired = !!(ctrl & BIT(1));
 720                 break;
 721         case PM8XXX_MPP_TYPE_SINK:
 722                 pin->mode = PM8XXX_MPP_SINK;
 723                 pin->drive_strength = 5 * (level + 1);
 724                 pin->output_value = !!(ctrl & BIT(0));
 725                 pin->paired = !!(ctrl & BIT(1));
 726                 break;
 727         case PM8XXX_MPP_TYPE_DTEST_SINK:
 728                 pin->mode = PM8XXX_MPP_SINK;
 729                 pin->dtest = ctrl + 1;
 730                 pin->drive_strength = 5 * (level + 1);
 731                 break;
 732         case PM8XXX_MPP_TYPE_DTEST_OUTPUT:
 733                 pin->mode = PM8XXX_MPP_DIGITAL;
 734                 pin->power_source = level;
 735                 if (ctrl >= 1)
 736                         pin->dtest = ctrl;
 737                 break;
 738         }
 739
 740         return 0;
 741 }
 742
 743 static const struct of_device_id pm8xxx_mpp_of_match[] = {
 744         { .compatible = "qcom,pm8018-mpp", .data = (void *)6 },
 745         { .compatible = "qcom,pm8038-mpp", .data = (void *)6 },
 746         { .compatible = "qcom,pm8917-mpp", .data = (void *)10 },
 747         { .compatible = "qcom,pm8821-mpp", .data = (void *)4 },
 748         { .compatible = "qcom,pm8921-mpp", .data = (void *)12 },
 749         { },
 750 };
 751 MODULE_DEVICE_TABLE(of, pm8xxx_mpp_of_match);
 752
 753 static int pm8xxx_mpp_probe(struct platform_device *pdev)
 754 {
 755         struct pm8xxx_pin_data *pin_data;
 756         struct pinctrl_pin_desc *pins;
 757         struct pm8xxx_mpp *pctrl;
 758         int ret;
 759         int i;
 760
 761         pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
 762         if (!pctrl)
 763                 return -ENOMEM;
 764
 765         pctrl->dev = &pdev->dev;
 766         pctrl->npins = (unsigned)of_device_get_match_data(&pdev->dev);
 767
 768         pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 769         if (!pctrl->regmap) {
 770                 dev_err(&pdev->dev, "parent regmap unavailable\n");
 771                 return -ENXIO;
 772         }
 773
 774         pctrl->desc = pm8xxx_pinctrl_desc;
 775         pctrl->desc.npins = pctrl->npins;
 776
 777         pins = devm_kcalloc(&pdev->dev,
 778                             pctrl->desc.npins,
 779                             sizeof(struct pinctrl_pin_desc),
 780                             GFP_KERNEL);
 781         if (!pins)
 782                 return -ENOMEM;
 783
 784         pin_data = devm_kcalloc(&pdev->dev,
 785                                 pctrl->desc.npins,
 786                                 sizeof(struct pm8xxx_pin_data),
 787                                 GFP_KERNEL);
 788         if (!pin_data)
 789                 return -ENOMEM;
 790
 791         for (i = 0; i < pctrl->desc.npins; i++) {
 792                 pin_data[i].reg = SSBI_REG_ADDR_MPP(i);
 793                 pin_data[i].irq = platform_get_irq(pdev, i);
 794                 if (pin_data[i].irq < 0) {
 795                         dev_err(&pdev->dev,
 796                                 "missing interrupts for pin %d\n", i);
 797                         return pin_data[i].irq;
 798                 }
 799
 800                 ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
 801                 if (ret)
 802                         return ret;
 803
 804                 pins[i].number = i;
 805                 pins[i].name = pm8xxx_groups[i];
 806                 pins[i].drv_data = &pin_data[i];
 807         }
 808         pctrl->desc.pins = pins;
 809
 810         pctrl->desc.num_custom_params = ARRAY_SIZE(pm8xxx_mpp_bindings);
 811         pctrl->desc.custom_params = pm8xxx_mpp_bindings;
 812 #ifdef CONFIG_DEBUG_FS
 813         pctrl->desc.custom_conf_items = pm8xxx_conf_items;
 814 #endif
 815
 816         pctrl->pctrl = pinctrl_register(&pctrl->desc, &pdev->dev, pctrl);
 817         if (IS_ERR(pctrl->pctrl)) {
 818                 dev_err(&pdev->dev, "couldn't register pm8xxx mpp driver\n");
 819                 return PTR_ERR(pctrl->pctrl);
 820         }
 821
 822         pctrl->chip = pm8xxx_mpp_template;
 823         pctrl->chip.base = -1;
 824         pctrl->chip.dev = &pdev->dev;
 825         pctrl->chip.of_node = pdev->dev.of_node;
 826         pctrl->chip.of_gpio_n_cells = 2;
 827         pctrl->chip.label = dev_name(pctrl->dev);
 828         pctrl->chip.ngpio = pctrl->npins;
 829         ret = gpiochip_add(&pctrl->chip);
 830         if (ret) {
 831                 dev_err(&pdev->dev, "failed register gpiochip\n");
 832                 goto unregister_pinctrl;
 833         }
 834
 835         ret = gpiochip_add_pin_range(&pctrl->chip,
 836                                      dev_name(pctrl->dev),
 837                                      0, 0, pctrl->chip.ngpio);
 838         if (ret) {
 839                 dev_err(pctrl->dev, "failed to add pin range\n");
 840                 goto unregister_gpiochip;
 841         }
 842
 843         platform_set_drvdata(pdev, pctrl);
 844
 845         dev_dbg(&pdev->dev, "Qualcomm pm8xxx mpp driver probed\n");
 846
 847         return 0;
 848
 849 unregister_gpiochip:
 850         gpiochip_remove(&pctrl->chip);
 851
 852 unregister_pinctrl:
 853         pinctrl_unregister(pctrl->pctrl);
 854
 855         return ret;
 856 }
 857
 858 static int pm8xxx_mpp_remove(struct platform_device *pdev)
 859 {
 860         struct pm8xxx_mpp *pctrl = platform_get_drvdata(pdev);
 861
 862         gpiochip_remove(&pctrl->chip);
 863
 864         pinctrl_unregister(pctrl->pctrl);
 865
 866         return 0;
 867 }
 868
 869 static struct platform_driver pm8xxx_mpp_driver = {
 870         .driver = {
 871                 .name = "qcom-ssbi-mpp",
 872                 .of_match_table = pm8xxx_mpp_of_match,
 873         },
 874         .probe = pm8xxx_mpp_probe,
 875         .remove = pm8xxx_mpp_remove,
 876 };
 877
 878 module_platform_driver(pm8xxx_mpp_driver);
 879
 880 MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
 881 MODULE_DESCRIPTION("Qualcomm PM8xxx MPP driver");
 882 MODULE_LICENSE("GPL v2");