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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/gpio/driver.h>
   7 #include <linux/module.h>
   8 #include <linux/of.h>
   9 #include <linux/of_irq.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/regmap.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/slab.h>
  14 #include <linux/types.h>
  15
  16 #include <linux/pinctrl/pinconf-generic.h>
  17 #include <linux/pinctrl/pinconf.h>
  18 #include <linux/pinctrl/pinmux.h>
  19
  20 #include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
  21
  22 #include "../core.h"
  23 #include "../pinctrl-utils.h"
  24
  25 #define PMIC_MPP_ADDRESS_RANGE                  0x100
  26
  27 /*
  28  * Pull Up Values - it indicates whether a pull-up should be
  29  * applied for bidirectional mode only. The hardware ignores the
  30  * configuration when operating in other modes.
  31  */
  32 #define PMIC_MPP_PULL_UP_0P6KOHM                0
  33 #define PMIC_MPP_PULL_UP_10KOHM                 1
  34 #define PMIC_MPP_PULL_UP_30KOHM                 2
  35 #define PMIC_MPP_PULL_UP_OPEN                   3
  36
  37 /* type registers base address bases */
  38 #define PMIC_MPP_REG_TYPE                       0x4
  39 #define PMIC_MPP_REG_SUBTYPE                    0x5
  40
  41 /* mpp peripheral type and subtype values */
  42 #define PMIC_MPP_TYPE                           0x11
  43 #define PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT         0x3
  44 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT     0x4
  45 #define PMIC_MPP_SUBTYPE_4CH_NO_SINK            0x5
  46 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK        0x6
  47 #define PMIC_MPP_SUBTYPE_4CH_FULL_FUNC          0x7
  48 #define PMIC_MPP_SUBTYPE_8CH_FULL_FUNC          0xf
  49
  50 #define PMIC_MPP_REG_RT_STS                     0x10
  51 #define PMIC_MPP_REG_RT_STS_VAL_MASK            0x1
  52
  53 /* control register base address bases */
  54 #define PMIC_MPP_REG_MODE_CTL                   0x40
  55 #define PMIC_MPP_REG_DIG_VIN_CTL                0x41
  56 #define PMIC_MPP_REG_DIG_PULL_CTL               0x42
  57 #define PMIC_MPP_REG_DIG_IN_CTL                 0x43
  58 #define PMIC_MPP_REG_EN_CTL                     0x46
  59 #define PMIC_MPP_REG_AOUT_CTL                   0x48
  60 #define PMIC_MPP_REG_AIN_CTL                    0x4a
  61 #define PMIC_MPP_REG_SINK_CTL                   0x4c
  62
  63 /* PMIC_MPP_REG_MODE_CTL */
  64 #define PMIC_MPP_REG_MODE_VALUE_MASK            0x1
  65 #define PMIC_MPP_REG_MODE_FUNCTION_SHIFT        1
  66 #define PMIC_MPP_REG_MODE_FUNCTION_MASK         0x7
  67 #define PMIC_MPP_REG_MODE_DIR_SHIFT             4
  68 #define PMIC_MPP_REG_MODE_DIR_MASK              0x7
  69
  70 /* PMIC_MPP_REG_DIG_VIN_CTL */
  71 #define PMIC_MPP_REG_VIN_SHIFT                  0
  72 #define PMIC_MPP_REG_VIN_MASK                   0x7
  73
  74 /* PMIC_MPP_REG_DIG_PULL_CTL */
  75 #define PMIC_MPP_REG_PULL_SHIFT                 0
  76 #define PMIC_MPP_REG_PULL_MASK                  0x7
  77
  78 /* PMIC_MPP_REG_EN_CTL */
  79 #define PMIC_MPP_REG_MASTER_EN_SHIFT            7
  80
  81 /* PMIC_MPP_REG_AIN_CTL */
  82 #define PMIC_MPP_REG_AIN_ROUTE_SHIFT            0
  83 #define PMIC_MPP_REG_AIN_ROUTE_MASK             0x7
  84
  85 #define PMIC_MPP_MODE_DIGITAL_INPUT             0
  86 #define PMIC_MPP_MODE_DIGITAL_OUTPUT            1
  87 #define PMIC_MPP_MODE_DIGITAL_BIDIR             2
  88 #define PMIC_MPP_MODE_ANALOG_BIDIR              3
  89 #define PMIC_MPP_MODE_ANALOG_INPUT              4
  90 #define PMIC_MPP_MODE_ANALOG_OUTPUT             5
  91 #define PMIC_MPP_MODE_CURRENT_SINK              6
  92
  93 #define PMIC_MPP_SELECTOR_NORMAL                0
  94 #define PMIC_MPP_SELECTOR_PAIRED                1
  95 #define PMIC_MPP_SELECTOR_DTEST_FIRST           4
  96
  97 #define PMIC_MPP_PHYSICAL_OFFSET                1
  98
  99 /* Qualcomm specific pin configurations */
 100 #define PMIC_MPP_CONF_AMUX_ROUTE                (PIN_CONFIG_END + 1)
 101 #define PMIC_MPP_CONF_ANALOG_LEVEL              (PIN_CONFIG_END + 2)
 102 #define PMIC_MPP_CONF_DTEST_SELECTOR            (PIN_CONFIG_END + 3)
 103 #define PMIC_MPP_CONF_PAIRED                    (PIN_CONFIG_END + 4)
 104
 105 /**
 106  * struct pmic_mpp_pad - keep current MPP settings
 107  * @base: Address base in SPMI device.
 108  * @is_enabled: Set to false when MPP should be put in high Z state.
 109  * @out_value: Cached pin output value.
 110  * @output_enabled: Set to true if MPP output logic is enabled.
 111  * @input_enabled: Set to true if MPP input buffer logic is enabled.
 112  * @paired: Pin operates in paired mode
 113  * @has_pullup: Pin has support to configure pullup
 114  * @num_sources: Number of power-sources supported by this MPP.
 115  * @power_source: Current power-source used.
 116  * @amux_input: Set the source for analog input.
 117  * @aout_level: Analog output level
 118  * @pullup: Pullup resistor value. Valid in Bidirectional mode only.
 119  * @function: See pmic_mpp_functions[].
 120  * @drive_strength: Amount of current in sink mode
 121  * @dtest: DTEST route selector
 122  */
 123 struct pmic_mpp_pad {
 124         u16             base;
 125         bool            is_enabled;
 126         bool            out_value;
 127         bool            output_enabled;
 128         bool            input_enabled;
 129         bool            paired;
 130         bool            has_pullup;
 131         unsigned int    num_sources;
 132         unsigned int    power_source;
 133         unsigned int    amux_input;
 134         unsigned int    aout_level;
 135         unsigned int    pullup;
 136         unsigned int    function;
 137         unsigned int    drive_strength;
 138         unsigned int    dtest;
 139 };
 140
 141 struct pmic_mpp_state {
 142         struct device   *dev;
 143         struct regmap   *map;
 144         struct pinctrl_dev *ctrl;
 145         struct gpio_chip chip;
 146 };
 147
 148 static const struct pinconf_generic_params pmic_mpp_bindings[] = {
 149         {"qcom,amux-route",     PMIC_MPP_CONF_AMUX_ROUTE,       0},
 150         {"qcom,analog-level",   PMIC_MPP_CONF_ANALOG_LEVEL,     0},
 151         {"qcom,dtest",          PMIC_MPP_CONF_DTEST_SELECTOR,   0},
 152         {"qcom,paired",         PMIC_MPP_CONF_PAIRED,           0},
 153 };
 154
 155 #ifdef CONFIG_DEBUG_FS
 156 static const struct pin_config_item pmic_conf_items[] = {
 157         PCONFDUMP(PMIC_MPP_CONF_AMUX_ROUTE, "analog mux", NULL, true),
 158         PCONFDUMP(PMIC_MPP_CONF_ANALOG_LEVEL, "analog level", NULL, true),
 159         PCONFDUMP(PMIC_MPP_CONF_DTEST_SELECTOR, "dtest", NULL, true),
 160         PCONFDUMP(PMIC_MPP_CONF_PAIRED, "paired", NULL, false),
 161 };
 162 #endif
 163
 164 static const char *const pmic_mpp_groups[] = {
 165         "mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
 166 };
 167
 168 #define PMIC_MPP_DIGITAL        0
 169 #define PMIC_MPP_ANALOG         1
 170 #define PMIC_MPP_SINK           2
 171
 172 static const char *const pmic_mpp_functions[] = {
 173         "digital", "analog", "sink"
 174 };
 175
 176 static int pmic_mpp_read(struct pmic_mpp_state *state,
 177                          struct pmic_mpp_pad *pad, unsigned int addr)
 178 {
 179         unsigned int val;
 180         int ret;
 181
 182         ret = regmap_read(state->map, pad->base + addr, &val);
 183         if (ret < 0)
 184                 dev_err(state->dev, "read 0x%x failed\n", addr);
 185         else
 186                 ret = val;
 187
 188         return ret;
 189 }
 190
 191 static int pmic_mpp_write(struct pmic_mpp_state *state,
 192                           struct pmic_mpp_pad *pad, unsigned int addr,
 193                           unsigned int val)
 194 {
 195         int ret;
 196
 197         ret = regmap_write(state->map, pad->base + addr, val);
 198         if (ret < 0)
 199                 dev_err(state->dev, "write 0x%x failed\n", addr);
 200
 201         return ret;
 202 }
 203
 204 static int pmic_mpp_get_groups_count(struct pinctrl_dev *pctldev)
 205 {
 206         /* Every PIN is a group */
 207         return pctldev->desc->npins;
 208 }
 209
 210 static const char *pmic_mpp_get_group_name(struct pinctrl_dev *pctldev,
 211                                            unsigned pin)
 212 {
 213         return pctldev->desc->pins[pin].name;
 214 }
 215
 216 static int pmic_mpp_get_group_pins(struct pinctrl_dev *pctldev,
 217                                    unsigned pin,
 218                                    const unsigned **pins, unsigned *num_pins)
 219 {
 220         *pins = &pctldev->desc->pins[pin].number;
 221         *num_pins = 1;
 222         return 0;
 223 }
 224
 225 static const struct pinctrl_ops pmic_mpp_pinctrl_ops = {
 226         .get_groups_count       = pmic_mpp_get_groups_count,
 227         .get_group_name         = pmic_mpp_get_group_name,
 228         .get_group_pins         = pmic_mpp_get_group_pins,
 229         .dt_node_to_map         = pinconf_generic_dt_node_to_map_group,
 230         .dt_free_map            = pinctrl_utils_free_map,
 231 };
 232
 233 static int pmic_mpp_get_functions_count(struct pinctrl_dev *pctldev)
 234 {
 235         return ARRAY_SIZE(pmic_mpp_functions);
 236 }
 237
 238 static const char *pmic_mpp_get_function_name(struct pinctrl_dev *pctldev,
 239                                               unsigned function)
 240 {
 241         return pmic_mpp_functions[function];
 242 }
 243
 244 static int pmic_mpp_get_function_groups(struct pinctrl_dev *pctldev,
 245                                         unsigned function,
 246                                         const char *const **groups,
 247                                         unsigned *const num_qgroups)
 248 {
 249         *groups = pmic_mpp_groups;
 250         *num_qgroups = pctldev->desc->npins;
 251         return 0;
 252 }
 253
 254 static int pmic_mpp_write_mode_ctl(struct pmic_mpp_state *state,
 255                                    struct pmic_mpp_pad *pad)
 256 {
 257         unsigned int mode;
 258         unsigned int sel;
 259         unsigned int val;
 260         unsigned int en;
 261
 262         switch (pad->function) {
 263         case PMIC_MPP_ANALOG:
 264                 if (pad->input_enabled && pad->output_enabled)
 265                         mode = PMIC_MPP_MODE_ANALOG_BIDIR;
 266                 else if (pad->input_enabled)
 267                         mode = PMIC_MPP_MODE_ANALOG_INPUT;
 268                 else
 269                         mode = PMIC_MPP_MODE_ANALOG_OUTPUT;
 270                 break;
 271         case PMIC_MPP_DIGITAL:
 272                 if (pad->input_enabled && pad->output_enabled)
 273                         mode = PMIC_MPP_MODE_DIGITAL_BIDIR;
 274                 else if (pad->input_enabled)
 275                         mode = PMIC_MPP_MODE_DIGITAL_INPUT;
 276                 else
 277                         mode = PMIC_MPP_MODE_DIGITAL_OUTPUT;
 278                 break;
 279         case PMIC_MPP_SINK:
 280         default:
 281                 mode = PMIC_MPP_MODE_CURRENT_SINK;
 282                 break;
 283         }
 284
 285         if (pad->dtest)
 286                 sel = PMIC_MPP_SELECTOR_DTEST_FIRST + pad->dtest - 1;
 287         else if (pad->paired)
 288                 sel = PMIC_MPP_SELECTOR_PAIRED;
 289         else
 290                 sel = PMIC_MPP_SELECTOR_NORMAL;
 291
 292         en = !!pad->out_value;
 293
 294         val = mode << PMIC_MPP_REG_MODE_DIR_SHIFT |
 295               sel << PMIC_MPP_REG_MODE_FUNCTION_SHIFT |
 296               en;
 297
 298         return pmic_mpp_write(state, pad, PMIC_MPP_REG_MODE_CTL, val);
 299 }
 300
 301 static int pmic_mpp_set_mux(struct pinctrl_dev *pctldev, unsigned function,
 302                                 unsigned pin)
 303 {
 304         struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
 305         struct pmic_mpp_pad *pad;
 306         unsigned int val;
 307         int ret;
 308
 309         pad = pctldev->desc->pins[pin].drv_data;
 310
 311         pad->function = function;
 312
 313         ret = pmic_mpp_write_mode_ctl(state, pad);
 314         if (ret < 0)
 315                 return ret;
 316
 317         val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;
 318
 319         return pmic_mpp_write(state, pad, PMIC_MPP_REG_EN_CTL, val);
 320 }
 321
 322 static const struct pinmux_ops pmic_mpp_pinmux_ops = {
 323         .get_functions_count    = pmic_mpp_get_functions_count,
 324         .get_function_name      = pmic_mpp_get_function_name,
 325         .get_function_groups    = pmic_mpp_get_function_groups,
 326         .set_mux                = pmic_mpp_set_mux,
 327 };
 328
 329 static int pmic_mpp_config_get(struct pinctrl_dev *pctldev,
 330                                unsigned int pin, unsigned long *config)
 331 {
 332         unsigned param = pinconf_to_config_param(*config);
 333         struct pmic_mpp_pad *pad;
 334         unsigned arg = 0;
 335
 336         pad = pctldev->desc->pins[pin].drv_data;
 337
 338         switch (param) {
 339         case PIN_CONFIG_BIAS_DISABLE:
 340                 if (pad->pullup != PMIC_MPP_PULL_UP_OPEN)
 341                         return -EINVAL;
 342                 arg = 1;
 343                 break;
 344         case PIN_CONFIG_BIAS_PULL_UP:
 345                 switch (pad->pullup) {
 346                 case PMIC_MPP_PULL_UP_0P6KOHM:
 347                         arg = 600;
 348                         break;
 349                 case PMIC_MPP_PULL_UP_10KOHM:
 350                         arg = 10000;
 351                         break;
 352                 case PMIC_MPP_PULL_UP_30KOHM:
 353                         arg = 30000;
 354                         break;
 355                 default:
 356                         return -EINVAL;
 357                 }
 358                 break;
 359         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
 360                 if (pad->is_enabled)
 361                         return -EINVAL;
 362                 arg = 1;
 363                 break;
 364         case PIN_CONFIG_POWER_SOURCE:
 365                 arg = pad->power_source;
 366                 break;
 367         case PIN_CONFIG_INPUT_ENABLE:
 368                 if (!pad->input_enabled)
 369                         return -EINVAL;
 370                 arg = 1;
 371                 break;
 372         case PIN_CONFIG_OUTPUT:
 373                 arg = pad->out_value;
 374                 break;
 375         case PMIC_MPP_CONF_DTEST_SELECTOR:
 376                 arg = pad->dtest;
 377                 break;
 378         case PMIC_MPP_CONF_AMUX_ROUTE:
 379                 arg = pad->amux_input;
 380                 break;
 381         case PMIC_MPP_CONF_PAIRED:
 382                 if (!pad->paired)
 383                         return -EINVAL;
 384                 arg = 1;
 385                 break;
 386         case PIN_CONFIG_DRIVE_STRENGTH:
 387                 arg = pad->drive_strength;
 388                 break;
 389         case PMIC_MPP_CONF_ANALOG_LEVEL:
 390                 arg = pad->aout_level;
 391                 break;
 392         default:
 393                 return -EINVAL;
 394         }
 395
 396         /* Convert register value to pinconf value */
 397         *config = pinconf_to_config_packed(param, arg);
 398         return 0;
 399 }
 400
 401 static int pmic_mpp_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
 402                                unsigned long *configs, unsigned nconfs)
 403 {
 404         struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
 405         struct pmic_mpp_pad *pad;
 406         unsigned param, arg;
 407         unsigned int val;
 408         int i, ret;
 409
 410         pad = pctldev->desc->pins[pin].drv_data;
 411
 412         /* Make it possible to enable the pin, by not setting high impedance */
 413         pad->is_enabled = true;
 414
 415         for (i = 0; i < nconfs; i++) {
 416                 param = pinconf_to_config_param(configs[i]);
 417                 arg = pinconf_to_config_argument(configs[i]);
 418
 419                 switch (param) {
 420                 case PIN_CONFIG_BIAS_DISABLE:
 421                         pad->pullup = PMIC_MPP_PULL_UP_OPEN;
 422                         break;
 423                 case PIN_CONFIG_BIAS_PULL_UP:
 424                         switch (arg) {
 425                         case 600:
 426                                 pad->pullup = PMIC_MPP_PULL_UP_0P6KOHM;
 427                                 break;
 428                         case 10000:
 429                                 pad->pullup = PMIC_MPP_PULL_UP_10KOHM;
 430                                 break;
 431                         case 30000:
 432                                 pad->pullup = PMIC_MPP_PULL_UP_30KOHM;
 433                                 break;
 434                         default:
 435                                 return -EINVAL;
 436                         }
 437                         break;
 438                 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
 439                         pad->is_enabled = false;
 440                         break;
 441                 case PIN_CONFIG_POWER_SOURCE:
 442                         if (arg >= pad->num_sources)
 443                                 return -EINVAL;
 444                         pad->power_source = arg;
 445                         break;
 446                 case PIN_CONFIG_INPUT_ENABLE:
 447                         pad->input_enabled = arg ? true : false;
 448                         break;
 449                 case PIN_CONFIG_OUTPUT:
 450                         pad->output_enabled = true;
 451                         pad->out_value = arg;
 452                         break;
 453                 case PMIC_MPP_CONF_DTEST_SELECTOR:
 454                         pad->dtest = arg;
 455                         break;
 456                 case PIN_CONFIG_DRIVE_STRENGTH:
 457                         pad->drive_strength = arg;
 458                         break;
 459                 case PMIC_MPP_CONF_AMUX_ROUTE:
 460                         if (arg >= PMIC_MPP_AMUX_ROUTE_ABUS4)
 461                                 return -EINVAL;
 462                         pad->amux_input = arg;
 463                         break;
 464                 case PMIC_MPP_CONF_ANALOG_LEVEL:
 465                         pad->aout_level = arg;
 466                         break;
 467                 case PMIC_MPP_CONF_PAIRED:
 468                         pad->paired = !!arg;
 469                         break;
 470                 default:
 471                         return -EINVAL;
 472                 }
 473         }
 474
 475         val = pad->power_source << PMIC_MPP_REG_VIN_SHIFT;
 476
 477         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_VIN_CTL, val);
 478         if (ret < 0)
 479                 return ret;
 480
 481         if (pad->has_pullup) {
 482                 val = pad->pullup << PMIC_MPP_REG_PULL_SHIFT;
 483
 484                 ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_PULL_CTL,
 485                                      val);
 486                 if (ret < 0)
 487                         return ret;
 488         }
 489
 490         val = pad->amux_input & PMIC_MPP_REG_AIN_ROUTE_MASK;
 491
 492         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_AIN_CTL, val);
 493         if (ret < 0)
 494                 return ret;
 495
 496         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_AOUT_CTL, pad->aout_level);
 497         if (ret < 0)
 498                 return ret;
 499
 500         ret = pmic_mpp_write_mode_ctl(state, pad);
 501         if (ret < 0)
 502                 return ret;
 503
 504         ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_SINK_CTL, pad->drive_strength);
 505         if (ret < 0)
 506                 return ret;
 507
 508         val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;
 509
 510         return pmic_mpp_write(state, pad, PMIC_MPP_REG_EN_CTL, val);
 511 }
 512
 513 static void pmic_mpp_config_dbg_show(struct pinctrl_dev *pctldev,
 514                                      struct seq_file *s, unsigned pin)
 515 {
 516         struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
 517         struct pmic_mpp_pad *pad;
 518         int ret;
 519
 520         static const char *const biases[] = {
 521                 "0.6kOhm", "10kOhm", "30kOhm", "Disabled"
 522         };
 523
 524         pad = pctldev->desc->pins[pin].drv_data;
 525
 526         seq_printf(s, " mpp%-2d:", pin + PMIC_MPP_PHYSICAL_OFFSET);
 527
 528         if (!pad->is_enabled) {
 529                 seq_puts(s, " ---");
 530         } else {
 531
 532                 if (pad->input_enabled) {
 533                         ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
 534                         if (ret < 0)
 535                                 return;
 536
 537                         ret &= PMIC_MPP_REG_RT_STS_VAL_MASK;
 538                         pad->out_value = ret;
 539                 }
 540
 541                 seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in");
 542                 seq_printf(s, " %-7s", pmic_mpp_functions[pad->function]);
 543                 seq_printf(s, " vin-%d", pad->power_source);
 544                 seq_printf(s, " %d", pad->aout_level);
 545                 if (pad->has_pullup)
 546                         seq_printf(s, " %-8s", biases[pad->pullup]);
 547                 seq_printf(s, " %-4s", pad->out_value ? "high" : "low");
 548                 if (pad->dtest)
 549                         seq_printf(s, " dtest%d", pad->dtest);
 550                 if (pad->paired)
 551                         seq_puts(s, " paired");
 552         }
 553 }
 554
 555 static const struct pinconf_ops pmic_mpp_pinconf_ops = {
 556         .is_generic = true,
 557         .pin_config_group_get           = pmic_mpp_config_get,
 558         .pin_config_group_set           = pmic_mpp_config_set,
 559         .pin_config_group_dbg_show      = pmic_mpp_config_dbg_show,
 560 };
 561
 562 static int pmic_mpp_direction_input(struct gpio_chip *chip, unsigned pin)
 563 {
 564         struct pmic_mpp_state *state = gpiochip_get_data(chip);
 565         unsigned long config;
 566
 567         config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
 568
 569         return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
 570 }
 571
 572 static int pmic_mpp_direction_output(struct gpio_chip *chip,
 573                                      unsigned pin, int val)
 574 {
 575         struct pmic_mpp_state *state = gpiochip_get_data(chip);
 576         unsigned long config;
 577
 578         config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
 579
 580         return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
 581 }
 582
 583 static int pmic_mpp_get(struct gpio_chip *chip, unsigned pin)
 584 {
 585         struct pmic_mpp_state *state = gpiochip_get_data(chip);
 586         struct pmic_mpp_pad *pad;
 587         int ret;
 588
 589         pad = state->ctrl->desc->pins[pin].drv_data;
 590
 591         if (pad->input_enabled) {
 592                 ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
 593                 if (ret < 0)
 594                         return ret;
 595
 596                 pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK;
 597         }
 598
 599         return !!pad->out_value;
 600 }
 601
 602 static void pmic_mpp_set(struct gpio_chip *chip, unsigned pin, int value)
 603 {
 604         struct pmic_mpp_state *state = gpiochip_get_data(chip);
 605         unsigned long config;
 606
 607         config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
 608
 609         pmic_mpp_config_set(state->ctrl, pin, &config, 1);
 610 }
 611
 612 static int pmic_mpp_of_xlate(struct gpio_chip *chip,
 613                              const struct of_phandle_args *gpio_desc,
 614                              u32 *flags)
 615 {
 616         if (chip->of_gpio_n_cells < 2)
 617                 return -EINVAL;
 618
 619         if (flags)
 620                 *flags = gpio_desc->args[1];
 621
 622         return gpio_desc->args[0] - PMIC_MPP_PHYSICAL_OFFSET;
 623 }
 624
 625 static void pmic_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 626 {
 627         struct pmic_mpp_state *state = gpiochip_get_data(chip);
 628         unsigned i;
 629
 630         for (i = 0; i < chip->ngpio; i++) {
 631                 pmic_mpp_config_dbg_show(state->ctrl, s, i);
 632                 seq_puts(s, "\n");
 633         }
 634 }
 635
 636 static const struct gpio_chip pmic_mpp_gpio_template = {
 637         .direction_input        = pmic_mpp_direction_input,
 638         .direction_output       = pmic_mpp_direction_output,
 639         .get                    = pmic_mpp_get,
 640         .set                    = pmic_mpp_set,
 641         .request                = gpiochip_generic_request,
 642         .free                   = gpiochip_generic_free,
 643         .of_xlate               = pmic_mpp_of_xlate,
 644         .dbg_show               = pmic_mpp_dbg_show,
 645 };
 646
 647 static int pmic_mpp_populate(struct pmic_mpp_state *state,
 648                              struct pmic_mpp_pad *pad)
 649 {
 650         int type, subtype, val, dir;
 651         unsigned int sel;
 652
 653         type = pmic_mpp_read(state, pad, PMIC_MPP_REG_TYPE);
 654         if (type < 0)
 655                 return type;
 656
 657         if (type != PMIC_MPP_TYPE) {
 658                 dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n",
 659                         type, pad->base);
 660                 return -ENODEV;
 661         }
 662
 663         subtype = pmic_mpp_read(state, pad, PMIC_MPP_REG_SUBTYPE);
 664         if (subtype < 0)
 665                 return subtype;
 666
 667         switch (subtype) {
 668         case PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT:
 669         case PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT:
 670         case PMIC_MPP_SUBTYPE_4CH_NO_SINK:
 671         case PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK:
 672         case PMIC_MPP_SUBTYPE_4CH_FULL_FUNC:
 673                 pad->num_sources = 4;
 674                 break;
 675         case PMIC_MPP_SUBTYPE_8CH_FULL_FUNC:
 676                 pad->num_sources = 8;
 677                 break;
 678         default:
 679                 dev_err(state->dev, "unknown MPP type 0x%x at 0x%x\n",
 680                         subtype, pad->base);
 681                 return -ENODEV;
 682         }
 683
 684         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_MODE_CTL);
 685         if (val < 0)
 686                 return val;
 687
 688         pad->out_value = val & PMIC_MPP_REG_MODE_VALUE_MASK;
 689
 690         dir = val >> PMIC_MPP_REG_MODE_DIR_SHIFT;
 691         dir &= PMIC_MPP_REG_MODE_DIR_MASK;
 692
 693         switch (dir) {
 694         case PMIC_MPP_MODE_DIGITAL_INPUT:
 695                 pad->input_enabled = true;
 696                 pad->output_enabled = false;
 697                 pad->function = PMIC_MPP_DIGITAL;
 698                 break;
 699         case PMIC_MPP_MODE_DIGITAL_OUTPUT:
 700                 pad->input_enabled = false;
 701                 pad->output_enabled = true;
 702                 pad->function = PMIC_MPP_DIGITAL;
 703                 break;
 704         case PMIC_MPP_MODE_DIGITAL_BIDIR:
 705                 pad->input_enabled = true;
 706                 pad->output_enabled = true;
 707                 pad->function = PMIC_MPP_DIGITAL;
 708                 break;
 709         case PMIC_MPP_MODE_ANALOG_BIDIR:
 710                 pad->input_enabled = true;
 711                 pad->output_enabled = true;
 712                 pad->function = PMIC_MPP_ANALOG;
 713                 break;
 714         case PMIC_MPP_MODE_ANALOG_INPUT:
 715                 pad->input_enabled = true;
 716                 pad->output_enabled = false;
 717                 pad->function = PMIC_MPP_ANALOG;
 718                 break;
 719         case PMIC_MPP_MODE_ANALOG_OUTPUT:
 720                 pad->input_enabled = false;
 721                 pad->output_enabled = true;
 722                 pad->function = PMIC_MPP_ANALOG;
 723                 break;
 724         case PMIC_MPP_MODE_CURRENT_SINK:
 725                 pad->input_enabled = false;
 726                 pad->output_enabled = true;
 727                 pad->function = PMIC_MPP_SINK;
 728                 break;
 729         default:
 730                 dev_err(state->dev, "unknown MPP direction\n");
 731                 return -ENODEV;
 732         }
 733
 734         sel = val >> PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
 735         sel &= PMIC_MPP_REG_MODE_FUNCTION_MASK;
 736
 737         if (sel >= PMIC_MPP_SELECTOR_DTEST_FIRST)
 738                 pad->dtest = sel + 1;
 739         else if (sel == PMIC_MPP_SELECTOR_PAIRED)
 740                 pad->paired = true;
 741
 742         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_VIN_CTL);
 743         if (val < 0)
 744                 return val;
 745
 746         pad->power_source = val >> PMIC_MPP_REG_VIN_SHIFT;
 747         pad->power_source &= PMIC_MPP_REG_VIN_MASK;
 748
 749         if (subtype != PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT &&
 750             subtype != PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK) {
 751                 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_PULL_CTL);
 752                 if (val < 0)
 753                         return val;
 754
 755                 pad->pullup = val >> PMIC_MPP_REG_PULL_SHIFT;
 756                 pad->pullup &= PMIC_MPP_REG_PULL_MASK;
 757                 pad->has_pullup = true;
 758         }
 759
 760         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AIN_CTL);
 761         if (val < 0)
 762                 return val;
 763
 764         pad->amux_input = val >> PMIC_MPP_REG_AIN_ROUTE_SHIFT;
 765         pad->amux_input &= PMIC_MPP_REG_AIN_ROUTE_MASK;
 766
 767         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_SINK_CTL);
 768         if (val < 0)
 769                 return val;
 770
 771         pad->drive_strength = val;
 772
 773         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AOUT_CTL);
 774         if (val < 0)
 775                 return val;
 776
 777         pad->aout_level = val;
 778
 779         val = pmic_mpp_read(state, pad, PMIC_MPP_REG_EN_CTL);
 780         if (val < 0)
 781                 return val;
 782
 783         pad->is_enabled = !!val;
 784
 785         return 0;
 786 }
 787
 788 static int pmic_mpp_domain_translate(struct irq_domain *domain,
 789                                       struct irq_fwspec *fwspec,
 790                                       unsigned long *hwirq,
 791                                       unsigned int *type)
 792 {
 793         struct pmic_mpp_state *state = container_of(domain->host_data,
 794                                                      struct pmic_mpp_state,
 795                                                      chip);
 796
 797         if (fwspec->param_count != 2 ||
 798             fwspec->param[0] < 1 || fwspec->param[0] > state->chip.ngpio)
 799                 return -EINVAL;
 800
 801         *hwirq = fwspec->param[0] - PMIC_MPP_PHYSICAL_OFFSET;
 802         *type = fwspec->param[1];
 803
 804         return 0;
 805 }
 806
 807 static unsigned int pmic_mpp_child_offset_to_irq(struct gpio_chip *chip,
 808                                                   unsigned int offset)
 809 {
 810         return offset + PMIC_MPP_PHYSICAL_OFFSET;
 811 }
 812
 813 static int pmic_mpp_child_to_parent_hwirq(struct gpio_chip *chip,
 814                                            unsigned int child_hwirq,
 815                                            unsigned int child_type,
 816                                            unsigned int *parent_hwirq,
 817                                            unsigned int *parent_type)
 818 {
 819         *parent_hwirq = child_hwirq + 0xc0;
 820         *parent_type = child_type;
 821
 822         return 0;
 823 }
 824
 825 static void pmic_mpp_irq_mask(struct irq_data *d)
 826 {
 827         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 828
 829         irq_chip_mask_parent(d);
 830         gpiochip_disable_irq(gc, irqd_to_hwirq(d));
 831 }
 832
 833 static void pmic_mpp_irq_unmask(struct irq_data *d)
 834 {
 835         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 836
 837         gpiochip_enable_irq(gc, irqd_to_hwirq(d));
 838         irq_chip_unmask_parent(d);
 839 }
 840
 841 static const struct irq_chip pmic_mpp_irq_chip = {
 842         .name = "spmi-mpp",
 843         .irq_ack = irq_chip_ack_parent,
 844         .irq_mask = pmic_mpp_irq_mask,
 845         .irq_unmask = pmic_mpp_irq_unmask,
 846         .irq_set_type = irq_chip_set_type_parent,
 847         .irq_set_wake = irq_chip_set_wake_parent,
 848         .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_IMMUTABLE,
 849         GPIOCHIP_IRQ_RESOURCE_HELPERS,
 850 };
 851
 852 static int pmic_mpp_probe(struct platform_device *pdev)
 853 {
 854         struct irq_domain *parent_domain;
 855         struct device_node *parent_node;
 856         struct device *dev = &pdev->dev;
 857         struct pinctrl_pin_desc *pindesc;
 858         struct pinctrl_desc *pctrldesc;
 859         struct pmic_mpp_pad *pad, *pads;
 860         struct pmic_mpp_state *state;
 861         struct gpio_irq_chip *girq;
 862         int ret, npins, i;
 863         u32 reg;
 864
 865         ret = of_property_read_u32(dev->of_node, "reg", &reg);
 866         if (ret < 0) {
 867                 dev_err(dev, "missing base address");
 868                 return ret;
 869         }
 870
 871         npins = (uintptr_t) device_get_match_data(&pdev->dev);
 872
 873         BUG_ON(npins > ARRAY_SIZE(pmic_mpp_groups));
 874
 875         state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
 876         if (!state)
 877                 return -ENOMEM;
 878
 879         platform_set_drvdata(pdev, state);
 880
 881         state->dev = &pdev->dev;
 882         state->map = dev_get_regmap(dev->parent, NULL);
 883
 884         pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL);
 885         if (!pindesc)
 886                 return -ENOMEM;
 887
 888         pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL);
 889         if (!pads)
 890                 return -ENOMEM;
 891
 892         pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL);
 893         if (!pctrldesc)
 894                 return -ENOMEM;
 895
 896         pctrldesc->pctlops = &pmic_mpp_pinctrl_ops;
 897         pctrldesc->pmxops = &pmic_mpp_pinmux_ops;
 898         pctrldesc->confops = &pmic_mpp_pinconf_ops;
 899         pctrldesc->owner = THIS_MODULE;
 900         pctrldesc->name = dev_name(dev);
 901         pctrldesc->pins = pindesc;
 902         pctrldesc->npins = npins;
 903
 904         pctrldesc->num_custom_params = ARRAY_SIZE(pmic_mpp_bindings);
 905         pctrldesc->custom_params = pmic_mpp_bindings;
 906 #ifdef CONFIG_DEBUG_FS
 907         pctrldesc->custom_conf_items = pmic_conf_items;
 908 #endif
 909
 910         for (i = 0; i < npins; i++, pindesc++) {
 911                 pad = &pads[i];
 912                 pindesc->drv_data = pad;
 913                 pindesc->number = i;
 914                 pindesc->name = pmic_mpp_groups[i];
 915
 916                 pad->base = reg + i * PMIC_MPP_ADDRESS_RANGE;
 917
 918                 ret = pmic_mpp_populate(state, pad);
 919                 if (ret < 0)
 920                         return ret;
 921         }
 922
 923         state->chip = pmic_mpp_gpio_template;
 924         state->chip.parent = dev;
 925         state->chip.base = -1;
 926         state->chip.ngpio = npins;
 927         state->chip.label = dev_name(dev);
 928         state->chip.of_gpio_n_cells = 2;
 929         state->chip.can_sleep = false;
 930
 931         state->ctrl = devm_pinctrl_register(dev, pctrldesc, state);
 932         if (IS_ERR(state->ctrl))
 933                 return PTR_ERR(state->ctrl);
 934
 935         parent_node = of_irq_find_parent(state->dev->of_node);
 936         if (!parent_node)
 937                 return -ENXIO;
 938
 939         parent_domain = irq_find_host(parent_node);
 940         of_node_put(parent_node);
 941         if (!parent_domain)
 942                 return -ENXIO;
 943
 944         girq = &state->chip.irq;
 945         gpio_irq_chip_set_chip(girq, &pmic_mpp_irq_chip);
 946         girq->default_type = IRQ_TYPE_NONE;
 947         girq->handler = handle_level_irq;
 948         girq->fwnode = dev_fwnode(state->dev);
 949         girq->parent_domain = parent_domain;
 950         girq->child_to_parent_hwirq = pmic_mpp_child_to_parent_hwirq;
 951         girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_fourcell;
 952         girq->child_offset_to_irq = pmic_mpp_child_offset_to_irq;
 953         girq->child_irq_domain_ops.translate = pmic_mpp_domain_translate;
 954
 955         ret = gpiochip_add_data(&state->chip, state);
 956         if (ret) {
 957                 dev_err(state->dev, "can't add gpio chip\n");
 958                 return ret;
 959         }
 960
 961         ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins);
 962         if (ret) {
 963                 dev_err(dev, "failed to add pin range\n");
 964                 goto err_range;
 965         }
 966
 967         return 0;
 968
 969 err_range:
 970         gpiochip_remove(&state->chip);
 971         return ret;
 972 }
 973
 974 static void pmic_mpp_remove(struct platform_device *pdev)
 975 {
 976         struct pmic_mpp_state *state = platform_get_drvdata(pdev);
 977
 978         gpiochip_remove(&state->chip);
 979 }
 980
 981 static const struct of_device_id pmic_mpp_of_match[] = {
 982         { .compatible = "qcom,pm8019-mpp", .data = (void *) 6 },
 983         { .compatible = "qcom,pm8226-mpp", .data = (void *) 8 },
 984         { .compatible = "qcom,pm8841-mpp", .data = (void *) 4 },
 985         { .compatible = "qcom,pm8916-mpp", .data = (void *) 4 },
 986         { .compatible = "qcom,pm8941-mpp", .data = (void *) 8 },
 987         { .compatible = "qcom,pm8950-mpp", .data = (void *) 4 },
 988         { .compatible = "qcom,pmi8950-mpp", .data = (void *) 4 },
 989         { .compatible = "qcom,pm8994-mpp", .data = (void *) 8 },
 990         { .compatible = "qcom,pma8084-mpp", .data = (void *) 8 },
 991         { .compatible = "qcom,pmi8994-mpp", .data = (void *) 4 },
 992         { },
 993 };
 994
 995 MODULE_DEVICE_TABLE(of, pmic_mpp_of_match);
 996
 997 static struct platform_driver pmic_mpp_driver = {
 998         .driver = {
 999                    .name = "qcom-spmi-mpp",
1000                    .of_match_table = pmic_mpp_of_match,
1001         },
1002         .probe  = pmic_mpp_probe,
1003         .remove_new = pmic_mpp_remove,
1004 };
1005
1006 module_platform_driver(pmic_mpp_driver);
1007
1008 MODULE_AUTHOR("Ivan T. Ivanov <[email protected]>");
1009 MODULE_DESCRIPTION("Qualcomm SPMI PMIC MPP pin control driver");
1010 MODULE_ALIAS("platform:qcom-spmi-mpp");
1011 MODULE_LICENSE("GPL v2");