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/pinctrl/pinconf-generic.h> 11 #include <linux/pinctrl/pinconf.h> 12 #include <linux/pinctrl/pinmux.h> 13 #include <linux/platform_device.h> 14 #include <linux/regmap.h> 15 #include <linux/slab.h> 16 #include <linux/types.h> 17 18 #include <dt-bindings/pinctrl/qcom,pmic-mpp.h> 19 20 #include "../core.h" 21 #include "../pinctrl-utils.h" 22 23 #define PMIC_MPP_ADDRESS_RANGE 0x100 24 25 /* 26 * Pull Up Values - it indicates whether a pull-up should be 27 * applied for bidirectional mode only. The hardware ignores the 28 * configuration when operating in other modes. 29 */ 30 #define PMIC_MPP_PULL_UP_0P6KOHM 0 31 #define PMIC_MPP_PULL_UP_10KOHM 1 32 #define PMIC_MPP_PULL_UP_30KOHM 2 33 #define PMIC_MPP_PULL_UP_OPEN 3 34 35 /* type registers base address bases */ 36 #define PMIC_MPP_REG_TYPE 0x4 37 #define PMIC_MPP_REG_SUBTYPE 0x5 38 39 /* mpp peripheral type and subtype values */ 40 #define PMIC_MPP_TYPE 0x11 41 #define PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT 0x3 42 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT 0x4 43 #define PMIC_MPP_SUBTYPE_4CH_NO_SINK 0x5 44 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK 0x6 45 #define PMIC_MPP_SUBTYPE_4CH_FULL_FUNC 0x7 46 #define PMIC_MPP_SUBTYPE_8CH_FULL_FUNC 0xf 47 48 #define PMIC_MPP_REG_RT_STS 0x10 49 #define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1 50 51 /* control register base address bases */ 52 #define PMIC_MPP_REG_MODE_CTL 0x40 53 #define PMIC_MPP_REG_DIG_VIN_CTL 0x41 54 #define PMIC_MPP_REG_DIG_PULL_CTL 0x42 55 #define PMIC_MPP_REG_DIG_IN_CTL 0x43 56 #define PMIC_MPP_REG_EN_CTL 0x46 57 #define PMIC_MPP_REG_AOUT_CTL 0x48 58 #define PMIC_MPP_REG_AIN_CTL 0x4a 59 #define PMIC_MPP_REG_SINK_CTL 0x4c 60 61 /* PMIC_MPP_REG_MODE_CTL */ 62 #define PMIC_MPP_REG_MODE_VALUE_MASK 0x1 63 #define PMIC_MPP_REG_MODE_FUNCTION_SHIFT 1 64 #define PMIC_MPP_REG_MODE_FUNCTION_MASK 0x7 65 #define PMIC_MPP_REG_MODE_DIR_SHIFT 4 66 #define PMIC_MPP_REG_MODE_DIR_MASK 0x7 67 68 /* PMIC_MPP_REG_DIG_VIN_CTL */ 69 #define PMIC_MPP_REG_VIN_SHIFT 0 70 #define PMIC_MPP_REG_VIN_MASK 0x7 71 72 /* PMIC_MPP_REG_DIG_PULL_CTL */ 73 #define PMIC_MPP_REG_PULL_SHIFT 0 74 #define PMIC_MPP_REG_PULL_MASK 0x7 75 76 /* PMIC_MPP_REG_EN_CTL */ 77 #define PMIC_MPP_REG_MASTER_EN_SHIFT 7 78 79 /* PMIC_MPP_REG_AIN_CTL */ 80 #define PMIC_MPP_REG_AIN_ROUTE_SHIFT 0 81 #define PMIC_MPP_REG_AIN_ROUTE_MASK 0x7 82 83 #define PMIC_MPP_MODE_DIGITAL_INPUT 0 84 #define PMIC_MPP_MODE_DIGITAL_OUTPUT 1 85 #define PMIC_MPP_MODE_DIGITAL_BIDIR 2 86 #define PMIC_MPP_MODE_ANALOG_BIDIR 3 87 #define PMIC_MPP_MODE_ANALOG_INPUT 4 88 #define PMIC_MPP_MODE_ANALOG_OUTPUT 5 89 #define PMIC_MPP_MODE_CURRENT_SINK 6 90 91 #define PMIC_MPP_SELECTOR_NORMAL 0 92 #define PMIC_MPP_SELECTOR_PAIRED 1 93 #define PMIC_MPP_SELECTOR_DTEST_FIRST 4 94 95 #define PMIC_MPP_PHYSICAL_OFFSET 1 96 97 /* Qualcomm specific pin configurations */ 98 #define PMIC_MPP_CONF_AMUX_ROUTE (PIN_CONFIG_END + 1) 99 #define PMIC_MPP_CONF_ANALOG_LEVEL (PIN_CONFIG_END + 2) 100 #define PMIC_MPP_CONF_DTEST_SELECTOR (PIN_CONFIG_END + 3) 101 #define PMIC_MPP_CONF_PAIRED (PIN_CONFIG_END + 4) 102 103 /** 104 * struct pmic_mpp_pad - keep current MPP settings 105 * @base: Address base in SPMI device. 106 * @irq: IRQ number which this MPP generate. 107 * @is_enabled: Set to false when MPP should be put in high Z state. 108 * @out_value: Cached pin output value. 109 * @output_enabled: Set to true if MPP output logic is enabled. 110 * @input_enabled: Set to true if MPP input buffer logic is enabled. 111 * @paired: Pin operates in paired mode 112 * @has_pullup: Pin has support to configure pullup 113 * @num_sources: Number of power-sources supported by this MPP. 114 * @power_source: Current power-source used. 115 * @amux_input: Set the source for analog input. 116 * @aout_level: Analog output level 117 * @pullup: Pullup resistor value. Valid in Bidirectional mode only. 118 * @function: See pmic_mpp_functions[]. 119 * @drive_strength: Amount of current in sink mode 120 * @dtest: DTEST route selector 121 */ 122 struct pmic_mpp_pad { 123 u16 base; 124 int irq; 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 int pmic_mpp_to_irq(struct gpio_chip *chip, unsigned pin) 626 { 627 struct pmic_mpp_state *state = gpiochip_get_data(chip); 628 struct pmic_mpp_pad *pad; 629 630 pad = state->ctrl->desc->pins[pin].drv_data; 631 632 return pad->irq; 633 } 634 635 static void pmic_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip) 636 { 637 struct pmic_mpp_state *state = gpiochip_get_data(chip); 638 unsigned i; 639 640 for (i = 0; i < chip->ngpio; i++) { 641 pmic_mpp_config_dbg_show(state->ctrl, s, i); 642 seq_puts(s, "\n"); 643 } 644 } 645 646 static const struct gpio_chip pmic_mpp_gpio_template = { 647 .direction_input = pmic_mpp_direction_input, 648 .direction_output = pmic_mpp_direction_output, 649 .get = pmic_mpp_get, 650 .set = pmic_mpp_set, 651 .request = gpiochip_generic_request, 652 .free = gpiochip_generic_free, 653 .of_xlate = pmic_mpp_of_xlate, 654 .to_irq = pmic_mpp_to_irq, 655 .dbg_show = pmic_mpp_dbg_show, 656 }; 657 658 static int pmic_mpp_populate(struct pmic_mpp_state *state, 659 struct pmic_mpp_pad *pad) 660 { 661 int type, subtype, val, dir; 662 unsigned int sel; 663 664 type = pmic_mpp_read(state, pad, PMIC_MPP_REG_TYPE); 665 if (type < 0) 666 return type; 667 668 if (type != PMIC_MPP_TYPE) { 669 dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n", 670 type, pad->base); 671 return -ENODEV; 672 } 673 674 subtype = pmic_mpp_read(state, pad, PMIC_MPP_REG_SUBTYPE); 675 if (subtype < 0) 676 return subtype; 677 678 switch (subtype) { 679 case PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT: 680 case PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT: 681 case PMIC_MPP_SUBTYPE_4CH_NO_SINK: 682 case PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK: 683 case PMIC_MPP_SUBTYPE_4CH_FULL_FUNC: 684 pad->num_sources = 4; 685 break; 686 case PMIC_MPP_SUBTYPE_8CH_FULL_FUNC: 687 pad->num_sources = 8; 688 break; 689 default: 690 dev_err(state->dev, "unknown MPP type 0x%x at 0x%x\n", 691 subtype, pad->base); 692 return -ENODEV; 693 } 694 695 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_MODE_CTL); 696 if (val < 0) 697 return val; 698 699 pad->out_value = val & PMIC_MPP_REG_MODE_VALUE_MASK; 700 701 dir = val >> PMIC_MPP_REG_MODE_DIR_SHIFT; 702 dir &= PMIC_MPP_REG_MODE_DIR_MASK; 703 704 switch (dir) { 705 case PMIC_MPP_MODE_DIGITAL_INPUT: 706 pad->input_enabled = true; 707 pad->output_enabled = false; 708 pad->function = PMIC_MPP_DIGITAL; 709 break; 710 case PMIC_MPP_MODE_DIGITAL_OUTPUT: 711 pad->input_enabled = false; 712 pad->output_enabled = true; 713 pad->function = PMIC_MPP_DIGITAL; 714 break; 715 case PMIC_MPP_MODE_DIGITAL_BIDIR: 716 pad->input_enabled = true; 717 pad->output_enabled = true; 718 pad->function = PMIC_MPP_DIGITAL; 719 break; 720 case PMIC_MPP_MODE_ANALOG_BIDIR: 721 pad->input_enabled = true; 722 pad->output_enabled = true; 723 pad->function = PMIC_MPP_ANALOG; 724 break; 725 case PMIC_MPP_MODE_ANALOG_INPUT: 726 pad->input_enabled = true; 727 pad->output_enabled = false; 728 pad->function = PMIC_MPP_ANALOG; 729 break; 730 case PMIC_MPP_MODE_ANALOG_OUTPUT: 731 pad->input_enabled = false; 732 pad->output_enabled = true; 733 pad->function = PMIC_MPP_ANALOG; 734 break; 735 case PMIC_MPP_MODE_CURRENT_SINK: 736 pad->input_enabled = false; 737 pad->output_enabled = true; 738 pad->function = PMIC_MPP_SINK; 739 break; 740 default: 741 dev_err(state->dev, "unknown MPP direction\n"); 742 return -ENODEV; 743 } 744 745 sel = val >> PMIC_MPP_REG_MODE_FUNCTION_SHIFT; 746 sel &= PMIC_MPP_REG_MODE_FUNCTION_MASK; 747 748 if (sel >= PMIC_MPP_SELECTOR_DTEST_FIRST) 749 pad->dtest = sel + 1; 750 else if (sel == PMIC_MPP_SELECTOR_PAIRED) 751 pad->paired = true; 752 753 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_VIN_CTL); 754 if (val < 0) 755 return val; 756 757 pad->power_source = val >> PMIC_MPP_REG_VIN_SHIFT; 758 pad->power_source &= PMIC_MPP_REG_VIN_MASK; 759 760 if (subtype != PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT && 761 subtype != PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK) { 762 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_PULL_CTL); 763 if (val < 0) 764 return val; 765 766 pad->pullup = val >> PMIC_MPP_REG_PULL_SHIFT; 767 pad->pullup &= PMIC_MPP_REG_PULL_MASK; 768 pad->has_pullup = true; 769 } 770 771 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AIN_CTL); 772 if (val < 0) 773 return val; 774 775 pad->amux_input = val >> PMIC_MPP_REG_AIN_ROUTE_SHIFT; 776 pad->amux_input &= PMIC_MPP_REG_AIN_ROUTE_MASK; 777 778 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_SINK_CTL); 779 if (val < 0) 780 return val; 781 782 pad->drive_strength = val; 783 784 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AOUT_CTL); 785 if (val < 0) 786 return val; 787 788 pad->aout_level = val; 789 790 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_EN_CTL); 791 if (val < 0) 792 return val; 793 794 pad->is_enabled = !!val; 795 796 return 0; 797 } 798 799 static int pmic_mpp_probe(struct platform_device *pdev) 800 { 801 struct device *dev = &pdev->dev; 802 struct pinctrl_pin_desc *pindesc; 803 struct pinctrl_desc *pctrldesc; 804 struct pmic_mpp_pad *pad, *pads; 805 struct pmic_mpp_state *state; 806 int ret, npins, i; 807 u32 reg; 808 809 ret = of_property_read_u32(dev->of_node, "reg", ®); 810 if (ret < 0) { 811 dev_err(dev, "missing base address"); 812 return ret; 813 } 814 815 npins = platform_irq_count(pdev); 816 if (!npins) 817 return -EINVAL; 818 if (npins < 0) 819 return npins; 820 821 BUG_ON(npins > ARRAY_SIZE(pmic_mpp_groups)); 822 823 state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); 824 if (!state) 825 return -ENOMEM; 826 827 platform_set_drvdata(pdev, state); 828 829 state->dev = &pdev->dev; 830 state->map = dev_get_regmap(dev->parent, NULL); 831 832 pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL); 833 if (!pindesc) 834 return -ENOMEM; 835 836 pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL); 837 if (!pads) 838 return -ENOMEM; 839 840 pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL); 841 if (!pctrldesc) 842 return -ENOMEM; 843 844 pctrldesc->pctlops = &pmic_mpp_pinctrl_ops; 845 pctrldesc->pmxops = &pmic_mpp_pinmux_ops; 846 pctrldesc->confops = &pmic_mpp_pinconf_ops; 847 pctrldesc->owner = THIS_MODULE; 848 pctrldesc->name = dev_name(dev); 849 pctrldesc->pins = pindesc; 850 pctrldesc->npins = npins; 851 852 pctrldesc->num_custom_params = ARRAY_SIZE(pmic_mpp_bindings); 853 pctrldesc->custom_params = pmic_mpp_bindings; 854 #ifdef CONFIG_DEBUG_FS 855 pctrldesc->custom_conf_items = pmic_conf_items; 856 #endif 857 858 for (i = 0; i < npins; i++, pindesc++) { 859 pad = &pads[i]; 860 pindesc->drv_data = pad; 861 pindesc->number = i; 862 pindesc->name = pmic_mpp_groups[i]; 863 864 pad->irq = platform_get_irq(pdev, i); 865 if (pad->irq < 0) 866 return pad->irq; 867 868 pad->base = reg + i * PMIC_MPP_ADDRESS_RANGE; 869 870 ret = pmic_mpp_populate(state, pad); 871 if (ret < 0) 872 return ret; 873 } 874 875 state->chip = pmic_mpp_gpio_template; 876 state->chip.parent = dev; 877 state->chip.base = -1; 878 state->chip.ngpio = npins; 879 state->chip.label = dev_name(dev); 880 state->chip.of_gpio_n_cells = 2; 881 state->chip.can_sleep = false; 882 883 state->ctrl = devm_pinctrl_register(dev, pctrldesc, state); 884 if (IS_ERR(state->ctrl)) 885 return PTR_ERR(state->ctrl); 886 887 ret = gpiochip_add_data(&state->chip, state); 888 if (ret) { 889 dev_err(state->dev, "can't add gpio chip\n"); 890 return ret; 891 } 892 893 ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins); 894 if (ret) { 895 dev_err(dev, "failed to add pin range\n"); 896 goto err_range; 897 } 898 899 return 0; 900 901 err_range: 902 gpiochip_remove(&state->chip); 903 return ret; 904 } 905 906 static int pmic_mpp_remove(struct platform_device *pdev) 907 { 908 struct pmic_mpp_state *state = platform_get_drvdata(pdev); 909 910 gpiochip_remove(&state->chip); 911 return 0; 912 } 913 914 static const struct of_device_id pmic_mpp_of_match[] = { 915 { .compatible = "qcom,pm8841-mpp" }, /* 4 MPP's */ 916 { .compatible = "qcom,pm8916-mpp" }, /* 4 MPP's */ 917 { .compatible = "qcom,pm8941-mpp" }, /* 8 MPP's */ 918 { .compatible = "qcom,pm8950-mpp" }, /* 4 MPP's */ 919 { .compatible = "qcom,pmi8950-mpp" }, /* 4 MPP's */ 920 { .compatible = "qcom,pm8994-mpp" }, /* 8 MPP's */ 921 { .compatible = "qcom,pma8084-mpp" }, /* 8 MPP's */ 922 { .compatible = "qcom,spmi-mpp" }, /* Generic */ 923 { }, 924 }; 925 926 MODULE_DEVICE_TABLE(of, pmic_mpp_of_match); 927 928 static struct platform_driver pmic_mpp_driver = { 929 .driver = { 930 .name = "qcom-spmi-mpp", 931 .of_match_table = pmic_mpp_of_match, 932 }, 933 .probe = pmic_mpp_probe, 934 .remove = pmic_mpp_remove, 935 }; 936 937 module_platform_driver(pmic_mpp_driver); 938 939 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); 940 MODULE_DESCRIPTION("Qualcomm SPMI PMIC MPP pin control driver"); 941 MODULE_ALIAS("platform:qcom-spmi-mpp"); 942 MODULE_LICENSE("GPL v2"); 943