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

   1 /*
   2  * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/gpio.h>
  15 #include <linux/module.h>
  16 #include <linux/of.h>
  17 #include <linux/pinctrl/pinconf-generic.h>
  18 #include <linux/pinctrl/pinconf.h>
  19 #include <linux/pinctrl/pinmux.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24
  25 #include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
  26
  27 #include "../core.h"
  28 #include "../pinctrl-utils.h"
  29
  30 #define PMIC_MPP_ADDRESS_RANGE                  0x100
  31
  32 /*
  33  * Pull Up Values - it indicates whether a pull-up should be
  34  * applied for bidirectional mode only. The hardware ignores the
  35  * configuration when operating in other modes.
  36  */
  37 #define PMIC_MPP_PULL_UP_0P6KOHM                0
  38 #define PMIC_MPP_PULL_UP_10KOHM                 1
  39 #define PMIC_MPP_PULL_UP_30KOHM                 2
  40 #define PMIC_MPP_PULL_UP_OPEN                   3
  41
  42 /* type registers base address bases */
  43 #define PMIC_MPP_REG_TYPE                       0x4
  44 #define PMIC_MPP_REG_SUBTYPE                    0x5
  45
  46 /* mpp peripheral type and subtype values */
  47 #define PMIC_MPP_TYPE                           0x11
  48 #define PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT         0x3
  49 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT     0x4
  50 #define PMIC_MPP_SUBTYPE_4CH_NO_SINK            0x5
  51 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK        0x6
  52 #define PMIC_MPP_SUBTYPE_4CH_FULL_FUNC          0x7
  53 #define PMIC_MPP_SUBTYPE_8CH_FULL_FUNC          0xf
  54
  55 #define PMIC_MPP_REG_RT_STS                     0x10
  56 #define PMIC_MPP_REG_RT_STS_VAL_MASK            0x1
  57
  58 /* control register base address bases */
  59 #define PMIC_MPP_REG_MODE_CTL                   0x40
  60 #define PMIC_MPP_REG_DIG_VIN_CTL                0x41
  61 #define PMIC_MPP_REG_DIG_PULL_CTL               0x42
  62 #define PMIC_MPP_REG_DIG_IN_CTL                 0x43
  63 #define PMIC_MPP_REG_EN_CTL                     0x46
  64 #define PMIC_MPP_REG_AIN_CTL                    0x4a
  65
  66 /* PMIC_MPP_REG_MODE_CTL */
  67 #define PMIC_MPP_REG_MODE_VALUE_MASK            0x1
  68 #define PMIC_MPP_REG_MODE_FUNCTION_SHIFT        1
  69 #define PMIC_MPP_REG_MODE_FUNCTION_MASK         0x7
  70 #define PMIC_MPP_REG_MODE_DIR_SHIFT             4
  71 #define PMIC_MPP_REG_MODE_DIR_MASK              0x7
  72
  73 /* PMIC_MPP_REG_DIG_VIN_CTL */
  74 #define PMIC_MPP_REG_VIN_SHIFT                  0
  75 #define PMIC_MPP_REG_VIN_MASK                   0x7
  76
  77 /* PMIC_MPP_REG_DIG_PULL_CTL */
  78 #define PMIC_MPP_REG_PULL_SHIFT                 0
  79 #define PMIC_MPP_REG_PULL_MASK                  0x7
  80
  81 /* PMIC_MPP_REG_EN_CTL */
  82 #define PMIC_MPP_REG_MASTER_EN_SHIFT            7
  83
  84 /* PMIC_MPP_REG_AIN_CTL */
  85 #define PMIC_MPP_REG_AIN_ROUTE_SHIFT            0
  86 #define PMIC_MPP_REG_AIN_ROUTE_MASK             0x7
  87
  88 #define PMIC_MPP_PHYSICAL_OFFSET                1
  89
  90 /* Qualcomm specific pin configurations */
  91 #define PMIC_MPP_CONF_AMUX_ROUTE                (PIN_CONFIG_END + 1)
  92 #define PMIC_MPP_CONF_ANALOG_MODE               (PIN_CONFIG_END + 2)
  93
  94 /**
  95  * struct pmic_mpp_pad - keep current MPP settings
  96  * @base: Address base in SPMI device.
  97  * @irq: IRQ number which this MPP generate.
  98  * @is_enabled: Set to false when MPP should be put in high Z state.
  99  * @out_value: Cached pin output value.
 100  * @output_enabled: Set to true if MPP output logic is enabled.
 101  * @input_enabled: Set to true if MPP input buffer logic is enabled.
 102  * @analog_mode: Set to true when MPP should operate in Analog Input, Analog
 103  *      Output or Bidirectional Analog mode.
 104  * @num_sources: Number of power-sources supported by this MPP.
 105  * @power_source: Current power-source used.
 106  * @amux_input: Set the source for analog input.
 107  * @pullup: Pullup resistor value. Valid in Bidirectional mode only.
 108  * @function: See pmic_mpp_functions[].
 109  */
 110 struct pmic_mpp_pad {
 111         u16             base;
 112         int             irq;
 113         bool            is_enabled;
 114         bool            out_value;
 115         bool            output_enabled;
 116         bool            input_enabled;
 117         bool            analog_mode;
 118         unsigned int    num_sources;
 119         unsigned int    power_source;
 120         unsigned int    amux_input;
 121         unsigned int    pullup;
 122         unsigned int    function;
 123 };
 124
 125 struct pmic_mpp_state {
 126         struct device   *dev;
 127         struct regmap   *map;
 128         struct pinctrl_dev *ctrl;
 129         struct gpio_chip chip;
 130 };
 131
 132 struct pmic_mpp_bindings {
 133         const char      *property;
 134         unsigned        param;
 135 };
 136
 137 static struct pmic_mpp_bindings pmic_mpp_bindings[] = {
 138         {"qcom,amux-route",     PMIC_MPP_CONF_AMUX_ROUTE},
 139         {"qcom,analog-mode",    PMIC_MPP_CONF_ANALOG_MODE},
 140 };
 141
 142 static const char *const pmic_mpp_groups[] = {
 143         "mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
 144 };
 145
 146 static const char *const pmic_mpp_functions[] = {
 147         PMIC_MPP_FUNC_NORMAL, PMIC_MPP_FUNC_PAIRED,
 148         "reserved1", "reserved2",
 149         PMIC_MPP_FUNC_DTEST1, PMIC_MPP_FUNC_DTEST2,
 150         PMIC_MPP_FUNC_DTEST3, PMIC_MPP_FUNC_DTEST4,
 151 };
 152
 153 static inline struct pmic_mpp_state *to_mpp_state(struct gpio_chip *chip)
 154 {
 155         return container_of(chip, struct pmic_mpp_state, chip);
 156 };
 157
 158 static int pmic_mpp_read(struct pmic_mpp_state *state,
 159                          struct pmic_mpp_pad *pad, unsigned int addr)
 160 {
 161         unsigned int val;
 162         int ret;
 163
 164         ret = regmap_read(state->map, pad->base + addr, &val);
 165         if (ret < 0)
 166                 dev_err(state->dev, "read 0x%x failed\n", addr);
 167         else
 168                 ret = val;
 169
 170         return ret;
 171 }
 172
 173 static int pmic_mpp_write(struct pmic_mpp_state *state,
 174                           struct pmic_mpp_pad *pad, unsigned int addr,
 175                           unsigned int val)
 176 {
 177         int ret;
 178
 179         ret = regmap_write(state->map, pad->base + addr, val);
 180         if (ret < 0)
 181                 dev_err(state->dev, "write 0x%x failed\n", addr);
 182
 183         return ret;
 184 }
 185
 186 static int pmic_mpp_get_groups_count(struct pinctrl_dev *pctldev)
 187 {
 188         /* Every PIN is a group */
 189         return pctldev->desc->npins;
 190 }
 191
 192 static const char *pmic_mpp_get_group_name(struct pinctrl_dev *pctldev,
 193                                            unsigned pin)
 194 {
 195         return pctldev->desc->pins[pin].name;
 196 }
 197
 198 static int pmic_mpp_get_group_pins(struct pinctrl_dev *pctldev,
 199                                    unsigned pin,
 200                                    const unsigned **pins, unsigned *num_pins)
 201 {
 202         *pins = &pctldev->desc->pins[pin].number;
 203         *num_pins = 1;
 204         return 0;
 205 }
 206
 207 static int pmic_mpp_parse_dt_config(struct device_node *np,
 208                                     struct pinctrl_dev *pctldev,
 209                                     unsigned long **configs,
 210                                     unsigned int *nconfs)
 211 {
 212         struct pmic_mpp_bindings *par;
 213         unsigned long cfg;
 214         int ret, i;
 215         u32 val;
 216
 217         for (i = 0; i < ARRAY_SIZE(pmic_mpp_bindings); i++) {
 218                 par = &pmic_mpp_bindings[i];
 219                 ret = of_property_read_u32(np, par->property, &val);
 220
 221                 /* property not found */
 222                 if (ret == -EINVAL)
 223                         continue;
 224
 225                 /* use zero as default value, when no value is specified */
 226                 if (ret)
 227                         val = 0;
 228
 229                 dev_dbg(pctldev->dev, "found %s with value %u\n",
 230                         par->property, val);
 231
 232                 cfg = pinconf_to_config_packed(par->param, val);
 233
 234                 ret = pinctrl_utils_add_config(pctldev, configs, nconfs, cfg);
 235                 if (ret)
 236                         return ret;
 237         }
 238
 239         return 0;
 240 }
 241
 242 static int pmic_mpp_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 243                                       struct device_node *np,
 244                                       struct pinctrl_map **map,
 245                                       unsigned *reserv, unsigned *nmaps,
 246                                       enum pinctrl_map_type type)
 247 {
 248         unsigned long *configs = NULL;
 249         unsigned nconfs = 0;
 250         struct property *prop;
 251         const char *group;
 252         int ret;
 253
 254         ret = pmic_mpp_parse_dt_config(np, pctldev, &configs, &nconfs);
 255         if (ret < 0)
 256                 return ret;
 257
 258         if (!nconfs)
 259                 return 0;
 260
 261         ret = of_property_count_strings(np, "pins");
 262         if (ret < 0)
 263                 goto exit;
 264
 265         ret = pinctrl_utils_reserve_map(pctldev, map, reserv, nmaps, ret);
 266         if (ret < 0)
 267                 goto exit;
 268
 269         of_property_for_each_string(np, "pins", prop, group) {
 270                 ret = pinctrl_utils_add_map_configs(pctldev, map,
 271                                                     reserv, nmaps, group,
 272                                                     configs, nconfs, type);
 273                 if (ret < 0)
 274                         break;
 275         }
 276 exit:
 277         kfree(configs);
 278         return ret;
 279 }
 280
 281 static int pmic_mpp_dt_node_to_map(struct pinctrl_dev *pctldev,
 282                                    struct device_node *np_config,
 283                                    struct pinctrl_map **map, unsigned *nmaps)
 284 {
 285         struct device_node *np;
 286         enum pinctrl_map_type type;
 287         unsigned reserv;
 288         int ret;
 289
 290         ret = 0;
 291         *map = NULL;
 292         *nmaps = 0;
 293         reserv = 0;
 294         type = PIN_MAP_TYPE_CONFIGS_GROUP;
 295
 296         for_each_child_of_node(np_config, np) {
 297                 ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
 298                                                         &reserv, nmaps, type);
 299                 if (ret)
 300                         break;
 301
 302                 ret = pmic_mpp_dt_subnode_to_map(pctldev, np, map, &reserv,
 303                                                  nmaps, type);
 304                 if (ret)
 305                         break;
 306         }
 307
 308         if (ret < 0)
 309                 pinctrl_utils_dt_free_map(pctldev, *map, *nmaps);
 310
 311         return ret;
 312 }
 313
 314 static const struct pinctrl_ops pmic_mpp_pinctrl_ops = {
 315         .get_groups_count       = pmic_mpp_get_groups_count,
 316         .get_group_name         = pmic_mpp_get_group_name,
 317         .get_group_pins         = pmic_mpp_get_group_pins,
 318         .dt_node_to_map         = pmic_mpp_dt_node_to_map,
 319         .dt_free_map            = pinctrl_utils_dt_free_map,
 320 };
 321
 322 static int pmic_mpp_get_functions_count(struct pinctrl_dev *pctldev)
 323 {
 324         return ARRAY_SIZE(pmic_mpp_functions);
 325 }
 326
 327 static const char *pmic_mpp_get_function_name(struct pinctrl_dev *pctldev,
 328                                               unsigned function)
 329 {
 330         return pmic_mpp_functions[function];
 331 }
 332
 333 static int pmic_mpp_get_function_groups(struct pinctrl_dev *pctldev,
 334                                         unsigned function,
 335                                         const char *const **groups,
 336                                         unsigned *const num_qgroups)
 337 {
 338         *groups = pmic_mpp_groups;
 339         *num_qgroups = pctldev->desc->npins;
 340         return 0;
 341 }
 342
 343 static int pmic_mpp_set_mux(struct pinctrl_dev *pctldev, unsigned function,
 344                                 unsigned pin)
 345 {
 346         struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
 347         struct pmic_mpp_pad *pad;
 348         unsigned int val;
 349         int ret;
 350
 351         pad = pctldev->desc->pins[pin].drv_data;
 352
 353         pad->function = function;
 354
 355         if (!pad->analog_mode) {
 356                 val = 0;        /* just digital input */
 357                 if (pad->output_enabled) {
 358                         if (pad->input_enabled)
 359                                 val = 2; /* digital input and output */
 360                         else
 361                                 val = 1; /* just digital output */
 362                 }
 363         } else {
 364                 val = 4;        /* just analog input */
 365                 if (pad->output_enabled) {
 366                         if (pad->input_enabled)
 367                                 val = 3; /* analog input and output */
 368                         else
 369                                 val = 5; /* just analog output */
 370                 }
 371         }
 372
 373         val |= pad->function << PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
 374         val |= pad->out_value & PMIC_MPP_REG_MODE_VALUE_MASK;
 375
 376         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_MODE_CTL, val);
 377         if (ret < 0)
 378                 return ret;
 379
 380         val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;
 381
 382         return pmic_mpp_write(state, pad, PMIC_MPP_REG_EN_CTL, val);
 383 }
 384
 385 static const struct pinmux_ops pmic_mpp_pinmux_ops = {
 386         .get_functions_count    = pmic_mpp_get_functions_count,
 387         .get_function_name      = pmic_mpp_get_function_name,
 388         .get_function_groups    = pmic_mpp_get_function_groups,
 389         .set_mux                = pmic_mpp_set_mux,
 390 };
 391
 392 static int pmic_mpp_config_get(struct pinctrl_dev *pctldev,
 393                                unsigned int pin, unsigned long *config)
 394 {
 395         unsigned param = pinconf_to_config_param(*config);
 396         struct pmic_mpp_pad *pad;
 397         unsigned arg = 0;
 398
 399         pad = pctldev->desc->pins[pin].drv_data;
 400
 401         switch (param) {
 402         case PIN_CONFIG_BIAS_DISABLE:
 403                 arg = pad->pullup == PMIC_MPP_PULL_UP_OPEN;
 404                 break;
 405         case PIN_CONFIG_BIAS_PULL_UP:
 406                 switch (pad->pullup) {
 407                 case PMIC_MPP_PULL_UP_OPEN:
 408                         arg = 0;
 409                         break;
 410                 case PMIC_MPP_PULL_UP_0P6KOHM:
 411                         arg = 600;
 412                         break;
 413                 case PMIC_MPP_PULL_UP_10KOHM:
 414                         arg = 10000;
 415                         break;
 416                 case PMIC_MPP_PULL_UP_30KOHM:
 417                         arg = 30000;
 418                         break;
 419                 default:
 420                         return -EINVAL;
 421                 }
 422                 break;
 423         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
 424                 arg = !pad->is_enabled;
 425                 break;
 426         case PIN_CONFIG_POWER_SOURCE:
 427                 arg = pad->power_source;
 428                 break;
 429         case PIN_CONFIG_INPUT_ENABLE:
 430                 arg = pad->input_enabled;
 431                 break;
 432         case PIN_CONFIG_OUTPUT:
 433                 arg = pad->out_value;
 434                 break;
 435         case PMIC_MPP_CONF_AMUX_ROUTE:
 436                 arg = pad->amux_input;
 437                 break;
 438         case PMIC_MPP_CONF_ANALOG_MODE:
 439                 arg = pad->analog_mode;
 440                 break;
 441         default:
 442                 return -EINVAL;
 443         }
 444
 445         /* Convert register value to pinconf value */
 446         *config = pinconf_to_config_packed(param, arg);
 447         return 0;
 448 }
 449
 450 static int pmic_mpp_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
 451                                unsigned long *configs, unsigned nconfs)
 452 {
 453         struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
 454         struct pmic_mpp_pad *pad;
 455         unsigned param, arg;
 456         unsigned int val;
 457         int i, ret;
 458
 459         pad = pctldev->desc->pins[pin].drv_data;
 460
 461         for (i = 0; i < nconfs; i++) {
 462                 param = pinconf_to_config_param(configs[i]);
 463                 arg = pinconf_to_config_argument(configs[i]);
 464
 465                 switch (param) {
 466                 case PIN_CONFIG_BIAS_DISABLE:
 467                         pad->pullup = PMIC_MPP_PULL_UP_OPEN;
 468                         break;
 469                 case PIN_CONFIG_BIAS_PULL_UP:
 470                         switch (arg) {
 471                         case 600:
 472                                 pad->pullup = PMIC_MPP_PULL_UP_0P6KOHM;
 473                                 break;
 474                         case 10000:
 475                                 pad->pullup = PMIC_MPP_PULL_UP_10KOHM;
 476                                 break;
 477                         case 30000:
 478                                 pad->pullup = PMIC_MPP_PULL_UP_30KOHM;
 479                                 break;
 480                         default:
 481                                 return -EINVAL;
 482                         }
 483                         break;
 484                 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
 485                         pad->is_enabled = false;
 486                         break;
 487                 case PIN_CONFIG_POWER_SOURCE:
 488                         if (arg >= pad->num_sources)
 489                                 return -EINVAL;
 490                         pad->power_source = arg;
 491                         break;
 492                 case PIN_CONFIG_INPUT_ENABLE:
 493                         pad->input_enabled = arg ? true : false;
 494                         break;
 495                 case PIN_CONFIG_OUTPUT:
 496                         pad->output_enabled = true;
 497                         pad->out_value = arg;
 498                         break;
 499                 case PMIC_MPP_CONF_AMUX_ROUTE:
 500                         if (arg >= PMIC_MPP_AMUX_ROUTE_ABUS4)
 501                                 return -EINVAL;
 502                         pad->amux_input = arg;
 503                         break;
 504                 case PMIC_MPP_CONF_ANALOG_MODE:
 505                         pad->analog_mode = true;
 506                         break;
 507                 default:
 508                         return -EINVAL;
 509                 }
 510         }
 511
 512         val = pad->power_source << PMIC_MPP_REG_VIN_SHIFT;
 513
 514         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_VIN_CTL, val);
 515         if (ret < 0)
 516                 return ret;
 517
 518         val = pad->pullup << PMIC_MPP_REG_PULL_SHIFT;
 519
 520         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_PULL_CTL, val);
 521         if (ret < 0)
 522                 return ret;
 523
 524         val = pad->amux_input & PMIC_MPP_REG_AIN_ROUTE_MASK;
 525
 526         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_AIN_CTL, val);
 527         if (ret < 0)
 528                 return ret;
 529
 530         if (!pad->analog_mode) {
 531                 val = 0;        /* just digital input */
 532                 if (pad->output_enabled) {
 533                         if (pad->input_enabled)
 534                                 val = 2; /* digital input and output */
 535                         else
 536                                 val = 1; /* just digital output */
 537                 }
 538         } else {
 539                 val = 4;        /* just analog input */
 540                 if (pad->output_enabled) {
 541                         if (pad->input_enabled)
 542                                 val = 3; /* analog input and output */
 543                         else
 544                                 val = 5; /* just analog output */
 545                 }
 546         }
 547
 548         val = val << PMIC_MPP_REG_MODE_DIR_SHIFT;
 549         val |= pad->function << PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
 550         val |= pad->out_value & PMIC_MPP_REG_MODE_VALUE_MASK;
 551
 552         return pmic_mpp_write(state, pad, PMIC_MPP_REG_MODE_CTL, val);
 553 }
 554
 555 static void pmic_mpp_config_dbg_show(struct pinctrl_dev *pctldev,
 556                                      struct seq_file *s, unsigned pin)
 557 {
 558         struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
 559         struct pmic_mpp_pad *pad;
 560         int ret, val;
 561
 562         static const char *const biases[] = {
 563                 "0.6kOhm", "10kOhm", "30kOhm", "Disabled"
 564         };
 565
 566
 567         pad = pctldev->desc->pins[pin].drv_data;
 568
 569         seq_printf(s, " mpp%-2d:", pin + PMIC_MPP_PHYSICAL_OFFSET);
 570
 571         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_EN_CTL);
 572
 573         if (val < 0 || !(val >> PMIC_MPP_REG_MASTER_EN_SHIFT)) {
 574                 seq_puts(s, " ---");
 575         } else {
 576
 577                 if (pad->input_enabled) {
 578                         ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
 579                         if (!ret) {
 580                                 ret &= PMIC_MPP_REG_RT_STS_VAL_MASK;
 581                                 pad->out_value = ret;
 582                         }
 583                 }
 584
 585                 seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in");
 586                 seq_printf(s, " %-4s", pad->analog_mode ? "ana" : "dig");
 587                 seq_printf(s, " %-7s", pmic_mpp_functions[pad->function]);
 588                 seq_printf(s, " vin-%d", pad->power_source);
 589                 seq_printf(s, " %-8s", biases[pad->pullup]);
 590                 seq_printf(s, " %-4s", pad->out_value ? "high" : "low");
 591         }
 592 }
 593
 594 static const struct pinconf_ops pmic_mpp_pinconf_ops = {
 595         .pin_config_group_get           = pmic_mpp_config_get,
 596         .pin_config_group_set           = pmic_mpp_config_set,
 597         .pin_config_group_dbg_show      = pmic_mpp_config_dbg_show,
 598 };
 599
 600 static int pmic_mpp_direction_input(struct gpio_chip *chip, unsigned pin)
 601 {
 602         struct pmic_mpp_state *state = to_mpp_state(chip);
 603         unsigned long config;
 604
 605         config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
 606
 607         return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
 608 }
 609
 610 static int pmic_mpp_direction_output(struct gpio_chip *chip,
 611                                      unsigned pin, int val)
 612 {
 613         struct pmic_mpp_state *state = to_mpp_state(chip);
 614         unsigned long config;
 615
 616         config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
 617
 618         return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
 619 }
 620
 621 static int pmic_mpp_get(struct gpio_chip *chip, unsigned pin)
 622 {
 623         struct pmic_mpp_state *state = to_mpp_state(chip);
 624         struct pmic_mpp_pad *pad;
 625         int ret;
 626
 627         pad = state->ctrl->desc->pins[pin].drv_data;
 628
 629         if (pad->input_enabled) {
 630                 ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
 631                 if (ret < 0)
 632                         return ret;
 633
 634                 pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK;
 635         }
 636
 637         return pad->out_value;
 638 }
 639
 640 static void pmic_mpp_set(struct gpio_chip *chip, unsigned pin, int value)
 641 {
 642         struct pmic_mpp_state *state = to_mpp_state(chip);
 643         unsigned long config;
 644
 645         config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
 646
 647         pmic_mpp_config_set(state->ctrl, pin, &config, 1);
 648 }
 649
 650 static int pmic_mpp_request(struct gpio_chip *chip, unsigned base)
 651 {
 652         return pinctrl_request_gpio(chip->base + base);
 653 }
 654
 655 static void pmic_mpp_free(struct gpio_chip *chip, unsigned base)
 656 {
 657         pinctrl_free_gpio(chip->base + base);
 658 }
 659
 660 static int pmic_mpp_of_xlate(struct gpio_chip *chip,
 661                              const struct of_phandle_args *gpio_desc,
 662                              u32 *flags)
 663 {
 664         if (chip->of_gpio_n_cells < 2)
 665                 return -EINVAL;
 666
 667         if (flags)
 668                 *flags = gpio_desc->args[1];
 669
 670         return gpio_desc->args[0] - PMIC_MPP_PHYSICAL_OFFSET;
 671 }
 672
 673 static int pmic_mpp_to_irq(struct gpio_chip *chip, unsigned pin)
 674 {
 675         struct pmic_mpp_state *state = to_mpp_state(chip);
 676         struct pmic_mpp_pad *pad;
 677
 678         pad = state->ctrl->desc->pins[pin].drv_data;
 679
 680         return pad->irq;
 681 }
 682
 683 static void pmic_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 684 {
 685         struct pmic_mpp_state *state = to_mpp_state(chip);
 686         unsigned i;
 687
 688         for (i = 0; i < chip->ngpio; i++) {
 689                 pmic_mpp_config_dbg_show(state->ctrl, s, i);
 690                 seq_puts(s, "\n");
 691         }
 692 }
 693
 694 static const struct gpio_chip pmic_mpp_gpio_template = {
 695         .direction_input        = pmic_mpp_direction_input,
 696         .direction_output       = pmic_mpp_direction_output,
 697         .get                    = pmic_mpp_get,
 698         .set                    = pmic_mpp_set,
 699         .request                = pmic_mpp_request,
 700         .free                   = pmic_mpp_free,
 701         .of_xlate               = pmic_mpp_of_xlate,
 702         .to_irq                 = pmic_mpp_to_irq,
 703         .dbg_show               = pmic_mpp_dbg_show,
 704 };
 705
 706 static int pmic_mpp_populate(struct pmic_mpp_state *state,
 707                              struct pmic_mpp_pad *pad)
 708 {
 709         int type, subtype, val, dir;
 710
 711         type = pmic_mpp_read(state, pad, PMIC_MPP_REG_TYPE);
 712         if (type < 0)
 713                 return type;
 714
 715         if (type != PMIC_MPP_TYPE) {
 716                 dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n",
 717                         type, pad->base);
 718                 return -ENODEV;
 719         }
 720
 721         subtype = pmic_mpp_read(state, pad, PMIC_MPP_REG_SUBTYPE);
 722         if (subtype < 0)
 723                 return subtype;
 724
 725         switch (subtype) {
 726         case PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT:
 727         case PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT:
 728         case PMIC_MPP_SUBTYPE_4CH_NO_SINK:
 729         case PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK:
 730         case PMIC_MPP_SUBTYPE_4CH_FULL_FUNC:
 731                 pad->num_sources = 4;
 732                 break;
 733         case PMIC_MPP_SUBTYPE_8CH_FULL_FUNC:
 734                 pad->num_sources = 8;
 735                 break;
 736         default:
 737                 dev_err(state->dev, "unknown MPP type 0x%x at 0x%x\n",
 738                         subtype, pad->base);
 739                 return -ENODEV;
 740         }
 741
 742         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_MODE_CTL);
 743         if (val < 0)
 744                 return val;
 745
 746         pad->out_value = val & PMIC_MPP_REG_MODE_VALUE_MASK;
 747
 748         dir = val >> PMIC_MPP_REG_MODE_DIR_SHIFT;
 749         dir &= PMIC_MPP_REG_MODE_DIR_MASK;
 750
 751         switch (dir) {
 752         case 0:
 753                 pad->input_enabled = true;
 754                 pad->output_enabled = false;
 755                 pad->analog_mode = false;
 756                 break;
 757         case 1:
 758                 pad->input_enabled = false;
 759                 pad->output_enabled = true;
 760                 pad->analog_mode = false;
 761                 break;
 762         case 2:
 763                 pad->input_enabled = true;
 764                 pad->output_enabled = true;
 765                 pad->analog_mode = false;
 766                 break;
 767         case 3:
 768                 pad->input_enabled = true;
 769                 pad->output_enabled = true;
 770                 pad->analog_mode = true;
 771                 break;
 772         case 4:
 773                 pad->input_enabled = true;
 774                 pad->output_enabled = false;
 775                 pad->analog_mode = true;
 776                 break;
 777         case 5:
 778                 pad->input_enabled = false;
 779                 pad->output_enabled = true;
 780                 pad->analog_mode = true;
 781                 break;
 782         default:
 783                 dev_err(state->dev, "unknown MPP direction\n");
 784                 return -ENODEV;
 785         }
 786
 787         pad->function = val >> PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
 788         pad->function &= PMIC_MPP_REG_MODE_FUNCTION_MASK;
 789
 790         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_VIN_CTL);
 791         if (val < 0)
 792                 return val;
 793
 794         pad->power_source = val >> PMIC_MPP_REG_VIN_SHIFT;
 795         pad->power_source &= PMIC_MPP_REG_VIN_MASK;
 796
 797         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_PULL_CTL);
 798         if (val < 0)
 799                 return val;
 800
 801         pad->pullup = val >> PMIC_MPP_REG_PULL_SHIFT;
 802         pad->pullup &= PMIC_MPP_REG_PULL_MASK;
 803
 804         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AIN_CTL);
 805         if (val < 0)
 806                 return val;
 807
 808         pad->amux_input = val >> PMIC_MPP_REG_AIN_ROUTE_SHIFT;
 809         pad->amux_input &= PMIC_MPP_REG_AIN_ROUTE_MASK;
 810
 811         /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */
 812         pad->is_enabled = true;
 813         return 0;
 814 }
 815
 816 static int pmic_mpp_probe(struct platform_device *pdev)
 817 {
 818         struct device *dev = &pdev->dev;
 819         struct pinctrl_pin_desc *pindesc;
 820         struct pinctrl_desc *pctrldesc;
 821         struct pmic_mpp_pad *pad, *pads;
 822         struct pmic_mpp_state *state;
 823         int ret, npins, i;
 824         u32 res[2];
 825
 826         ret = of_property_read_u32_array(dev->of_node, "reg", res, 2);
 827         if (ret < 0) {
 828                 dev_err(dev, "missing base address and/or range");
 829                 return ret;
 830         }
 831
 832         npins = res[1] / PMIC_MPP_ADDRESS_RANGE;
 833         if (!npins)
 834                 return -EINVAL;
 835
 836         BUG_ON(npins > ARRAY_SIZE(pmic_mpp_groups));
 837
 838         state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
 839         if (!state)
 840                 return -ENOMEM;
 841
 842         platform_set_drvdata(pdev, state);
 843
 844         state->dev = &pdev->dev;
 845         state->map = dev_get_regmap(dev->parent, NULL);
 846
 847         pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL);
 848         if (!pindesc)
 849                 return -ENOMEM;
 850
 851         pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL);
 852         if (!pads)
 853                 return -ENOMEM;
 854
 855         pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL);
 856         if (!pctrldesc)
 857                 return -ENOMEM;
 858
 859         pctrldesc->pctlops = &pmic_mpp_pinctrl_ops;
 860         pctrldesc->pmxops = &pmic_mpp_pinmux_ops;
 861         pctrldesc->confops = &pmic_mpp_pinconf_ops;
 862         pctrldesc->owner = THIS_MODULE;
 863         pctrldesc->name = dev_name(dev);
 864         pctrldesc->pins = pindesc;
 865         pctrldesc->npins = npins;
 866
 867         for (i = 0; i < npins; i++, pindesc++) {
 868                 pad = &pads[i];
 869                 pindesc->drv_data = pad;
 870                 pindesc->number = i;
 871                 pindesc->name = pmic_mpp_groups[i];
 872
 873                 pad->irq = platform_get_irq(pdev, i);
 874                 if (pad->irq < 0)
 875                         return pad->irq;
 876
 877                 pad->base = res[0] + i * PMIC_MPP_ADDRESS_RANGE;
 878
 879                 ret = pmic_mpp_populate(state, pad);
 880                 if (ret < 0)
 881                         return ret;
 882         }
 883
 884         state->chip = pmic_mpp_gpio_template;
 885         state->chip.dev = dev;
 886         state->chip.base = -1;
 887         state->chip.ngpio = npins;
 888         state->chip.label = dev_name(dev);
 889         state->chip.of_gpio_n_cells = 2;
 890         state->chip.can_sleep = false;
 891
 892         state->ctrl = pinctrl_register(pctrldesc, dev, state);
 893         if (!state->ctrl)
 894                 return -ENODEV;
 895
 896         ret = gpiochip_add(&state->chip);
 897         if (ret) {
 898                 dev_err(state->dev, "can't add gpio chip\n");
 899                 goto err_chip;
 900         }
 901
 902         ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins);
 903         if (ret) {
 904                 dev_err(dev, "failed to add pin range\n");
 905                 goto err_range;
 906         }
 907
 908         return 0;
 909
 910 err_range:
 911         gpiochip_remove(&state->chip);
 912 err_chip:
 913         pinctrl_unregister(state->ctrl);
 914         return ret;
 915 }
 916
 917 static int pmic_mpp_remove(struct platform_device *pdev)
 918 {
 919         struct pmic_mpp_state *state = platform_get_drvdata(pdev);
 920
 921         gpiochip_remove(&state->chip);
 922         pinctrl_unregister(state->ctrl);
 923         return 0;
 924 }
 925
 926 static const struct of_device_id pmic_mpp_of_match[] = {
 927         { .compatible = "qcom,pm8841-mpp" },    /* 4 MPP's */
 928         { .compatible = "qcom,pm8941-mpp" },    /* 8 MPP's */
 929         { .compatible = "qcom,pma8084-mpp" },   /* 8 MPP's */
 930         { },
 931 };
 932
 933 MODULE_DEVICE_TABLE(of, pmic_mpp_of_match);
 934
 935 static struct platform_driver pmic_mpp_driver = {
 936         .driver = {
 937                    .name = "qcom-spmi-mpp",
 938                    .of_match_table = pmic_mpp_of_match,
 939         },
 940         .probe  = pmic_mpp_probe,
 941         .remove = pmic_mpp_remove,
 942 };
 943
 944 module_platform_driver(pmic_mpp_driver);
 945
 946 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
 947 MODULE_DESCRIPTION("Qualcomm SPMI PMIC MPP pin control driver");
 948 MODULE_ALIAS("platform:qcom-spmi-mpp");
 949 MODULE_LICENSE("GPL v2");