1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Pin controller and GPIO driver for Amlogic Meson SoCs 4 * 5 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com> 6 */ 7 8 /* 9 * The available pins are organized in banks (A,B,C,D,E,X,Y,Z,AO, 10 * BOOT,CARD for meson6, X,Y,DV,H,Z,AO,BOOT,CARD for meson8 and 11 * X,Y,DV,H,AO,BOOT,CARD,DIF for meson8b) and each bank has a 12 * variable number of pins. 13 * 14 * The AO bank is special because it belongs to the Always-On power 15 * domain which can't be powered off; the bank also uses a set of 16 * registers different from the other banks. 17 * 18 * For each pin controller there are 4 different register ranges that 19 * control the following properties of the pins: 20 * 1) pin muxing 21 * 2) pull enable/disable 22 * 3) pull up/down 23 * 4) GPIO direction, output value, input value 24 * 25 * In some cases the register ranges for pull enable and pull 26 * direction are the same and thus there are only 3 register ranges. 27 * 28 * Since Meson G12A SoC, the ao register ranges for gpio, pull enable 29 * and pull direction are the same, so there are only 2 register ranges. 30 * 31 * For the pull and GPIO configuration every bank uses a contiguous 32 * set of bits in the register sets described above; the same register 33 * can be shared by more banks with different offsets. 34 * 35 * In addition to this there are some registers shared between all 36 * banks that control the IRQ functionality. This feature is not 37 * supported at the moment by the driver. 38 */ 39 40 #include <linux/device.h> 41 #include <linux/gpio/driver.h> 42 #include <linux/init.h> 43 #include <linux/io.h> 44 #include <linux/of.h> 45 #include <linux/of_address.h> 46 #include <linux/of_device.h> 47 #include <linux/pinctrl/pinconf-generic.h> 48 #include <linux/pinctrl/pinconf.h> 49 #include <linux/pinctrl/pinctrl.h> 50 #include <linux/pinctrl/pinmux.h> 51 #include <linux/platform_device.h> 52 #include <linux/property.h> 53 #include <linux/regmap.h> 54 #include <linux/seq_file.h> 55 56 #include "../core.h" 57 #include "../pinctrl-utils.h" 58 #include "pinctrl-meson.h" 59 60 static const unsigned int meson_bit_strides[] = { 61 1, 1, 1, 1, 1, 2, 1 62 }; 63 64 /** 65 * meson_get_bank() - find the bank containing a given pin 66 * 67 * @pc: the pinctrl instance 68 * @pin: the pin number 69 * @bank: the found bank 70 * 71 * Return: 0 on success, a negative value on error 72 */ 73 static int meson_get_bank(struct meson_pinctrl *pc, unsigned int pin, 74 struct meson_bank **bank) 75 { 76 int i; 77 78 for (i = 0; i < pc->data->num_banks; i++) { 79 if (pin >= pc->data->banks[i].first && 80 pin <= pc->data->banks[i].last) { 81 *bank = &pc->data->banks[i]; 82 return 0; 83 } 84 } 85 86 return -EINVAL; 87 } 88 89 /** 90 * meson_calc_reg_and_bit() - calculate register and bit for a pin 91 * 92 * @bank: the bank containing the pin 93 * @pin: the pin number 94 * @reg_type: the type of register needed (pull-enable, pull, etc...) 95 * @reg: the computed register offset 96 * @bit: the computed bit 97 */ 98 static void meson_calc_reg_and_bit(struct meson_bank *bank, unsigned int pin, 99 enum meson_reg_type reg_type, 100 unsigned int *reg, unsigned int *bit) 101 { 102 struct meson_reg_desc *desc = &bank->regs[reg_type]; 103 104 *bit = (desc->bit + pin - bank->first) * meson_bit_strides[reg_type]; 105 *reg = (desc->reg + (*bit / 32)) * 4; 106 *bit &= 0x1f; 107 } 108 109 static int meson_get_groups_count(struct pinctrl_dev *pcdev) 110 { 111 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 112 113 return pc->data->num_groups; 114 } 115 116 static const char *meson_get_group_name(struct pinctrl_dev *pcdev, 117 unsigned selector) 118 { 119 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 120 121 return pc->data->groups[selector].name; 122 } 123 124 static int meson_get_group_pins(struct pinctrl_dev *pcdev, unsigned selector, 125 const unsigned **pins, unsigned *num_pins) 126 { 127 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 128 129 *pins = pc->data->groups[selector].pins; 130 *num_pins = pc->data->groups[selector].num_pins; 131 132 return 0; 133 } 134 135 static void meson_pin_dbg_show(struct pinctrl_dev *pcdev, struct seq_file *s, 136 unsigned offset) 137 { 138 seq_printf(s, " %s", dev_name(pcdev->dev)); 139 } 140 141 static const struct pinctrl_ops meson_pctrl_ops = { 142 .get_groups_count = meson_get_groups_count, 143 .get_group_name = meson_get_group_name, 144 .get_group_pins = meson_get_group_pins, 145 .dt_node_to_map = pinconf_generic_dt_node_to_map_all, 146 .dt_free_map = pinctrl_utils_free_map, 147 .pin_dbg_show = meson_pin_dbg_show, 148 }; 149 150 int meson_pmx_get_funcs_count(struct pinctrl_dev *pcdev) 151 { 152 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 153 154 return pc->data->num_funcs; 155 } 156 EXPORT_SYMBOL_GPL(meson_pmx_get_funcs_count); 157 158 const char *meson_pmx_get_func_name(struct pinctrl_dev *pcdev, 159 unsigned selector) 160 { 161 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 162 163 return pc->data->funcs[selector].name; 164 } 165 EXPORT_SYMBOL_GPL(meson_pmx_get_func_name); 166 167 int meson_pmx_get_groups(struct pinctrl_dev *pcdev, unsigned selector, 168 const char * const **groups, 169 unsigned * const num_groups) 170 { 171 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 172 173 *groups = pc->data->funcs[selector].groups; 174 *num_groups = pc->data->funcs[selector].num_groups; 175 176 return 0; 177 } 178 EXPORT_SYMBOL_GPL(meson_pmx_get_groups); 179 180 static int meson_pinconf_set_gpio_bit(struct meson_pinctrl *pc, 181 unsigned int pin, 182 unsigned int reg_type, 183 bool arg) 184 { 185 struct meson_bank *bank; 186 unsigned int reg, bit; 187 int ret; 188 189 ret = meson_get_bank(pc, pin, &bank); 190 if (ret) 191 return ret; 192 193 meson_calc_reg_and_bit(bank, pin, reg_type, ®, &bit); 194 return regmap_update_bits(pc->reg_gpio, reg, BIT(bit), 195 arg ? BIT(bit) : 0); 196 } 197 198 static int meson_pinconf_get_gpio_bit(struct meson_pinctrl *pc, 199 unsigned int pin, 200 unsigned int reg_type) 201 { 202 struct meson_bank *bank; 203 unsigned int reg, bit, val; 204 int ret; 205 206 ret = meson_get_bank(pc, pin, &bank); 207 if (ret) 208 return ret; 209 210 meson_calc_reg_and_bit(bank, pin, reg_type, ®, &bit); 211 ret = regmap_read(pc->reg_gpio, reg, &val); 212 if (ret) 213 return ret; 214 215 return BIT(bit) & val ? 1 : 0; 216 } 217 218 static int meson_pinconf_set_output(struct meson_pinctrl *pc, 219 unsigned int pin, 220 bool out) 221 { 222 return meson_pinconf_set_gpio_bit(pc, pin, MESON_REG_DIR, !out); 223 } 224 225 static int meson_pinconf_get_output(struct meson_pinctrl *pc, 226 unsigned int pin) 227 { 228 int ret = meson_pinconf_get_gpio_bit(pc, pin, MESON_REG_DIR); 229 230 if (ret < 0) 231 return ret; 232 233 return !ret; 234 } 235 236 static int meson_pinconf_set_drive(struct meson_pinctrl *pc, 237 unsigned int pin, 238 bool high) 239 { 240 return meson_pinconf_set_gpio_bit(pc, pin, MESON_REG_OUT, high); 241 } 242 243 static int meson_pinconf_get_drive(struct meson_pinctrl *pc, 244 unsigned int pin) 245 { 246 return meson_pinconf_get_gpio_bit(pc, pin, MESON_REG_OUT); 247 } 248 249 static int meson_pinconf_set_output_drive(struct meson_pinctrl *pc, 250 unsigned int pin, 251 bool high) 252 { 253 int ret; 254 255 ret = meson_pinconf_set_output(pc, pin, true); 256 if (ret) 257 return ret; 258 259 return meson_pinconf_set_drive(pc, pin, high); 260 } 261 262 static int meson_pinconf_disable_bias(struct meson_pinctrl *pc, 263 unsigned int pin) 264 { 265 struct meson_bank *bank; 266 unsigned int reg, bit = 0; 267 int ret; 268 269 ret = meson_get_bank(pc, pin, &bank); 270 if (ret) 271 return ret; 272 273 meson_calc_reg_and_bit(bank, pin, MESON_REG_PULLEN, ®, &bit); 274 ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), 0); 275 if (ret) 276 return ret; 277 278 return 0; 279 } 280 281 static int meson_pinconf_enable_bias(struct meson_pinctrl *pc, unsigned int pin, 282 bool pull_up) 283 { 284 struct meson_bank *bank; 285 unsigned int reg, bit, val = 0; 286 int ret; 287 288 ret = meson_get_bank(pc, pin, &bank); 289 if (ret) 290 return ret; 291 292 meson_calc_reg_and_bit(bank, pin, MESON_REG_PULL, ®, &bit); 293 if (pull_up) 294 val = BIT(bit); 295 296 ret = regmap_update_bits(pc->reg_pull, reg, BIT(bit), val); 297 if (ret) 298 return ret; 299 300 meson_calc_reg_and_bit(bank, pin, MESON_REG_PULLEN, ®, &bit); 301 ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), BIT(bit)); 302 if (ret) 303 return ret; 304 305 return 0; 306 } 307 308 static int meson_pinconf_set_drive_strength(struct meson_pinctrl *pc, 309 unsigned int pin, 310 u16 drive_strength_ua) 311 { 312 struct meson_bank *bank; 313 unsigned int reg, bit, ds_val; 314 int ret; 315 316 if (!pc->reg_ds) { 317 dev_err(pc->dev, "drive-strength not supported\n"); 318 return -ENOTSUPP; 319 } 320 321 ret = meson_get_bank(pc, pin, &bank); 322 if (ret) 323 return ret; 324 325 meson_calc_reg_and_bit(bank, pin, MESON_REG_DS, ®, &bit); 326 327 if (drive_strength_ua <= 500) { 328 ds_val = MESON_PINCONF_DRV_500UA; 329 } else if (drive_strength_ua <= 2500) { 330 ds_val = MESON_PINCONF_DRV_2500UA; 331 } else if (drive_strength_ua <= 3000) { 332 ds_val = MESON_PINCONF_DRV_3000UA; 333 } else if (drive_strength_ua <= 4000) { 334 ds_val = MESON_PINCONF_DRV_4000UA; 335 } else { 336 dev_warn_once(pc->dev, 337 "pin %u: invalid drive-strength : %d , default to 4mA\n", 338 pin, drive_strength_ua); 339 ds_val = MESON_PINCONF_DRV_4000UA; 340 } 341 342 ret = regmap_update_bits(pc->reg_ds, reg, 0x3 << bit, ds_val << bit); 343 if (ret) 344 return ret; 345 346 return 0; 347 } 348 349 static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin, 350 unsigned long *configs, unsigned num_configs) 351 { 352 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 353 enum pin_config_param param; 354 unsigned int arg = 0; 355 int i, ret; 356 357 for (i = 0; i < num_configs; i++) { 358 param = pinconf_to_config_param(configs[i]); 359 360 switch (param) { 361 case PIN_CONFIG_DRIVE_STRENGTH_UA: 362 case PIN_CONFIG_OUTPUT_ENABLE: 363 case PIN_CONFIG_OUTPUT: 364 arg = pinconf_to_config_argument(configs[i]); 365 break; 366 367 default: 368 break; 369 } 370 371 switch (param) { 372 case PIN_CONFIG_BIAS_DISABLE: 373 ret = meson_pinconf_disable_bias(pc, pin); 374 break; 375 case PIN_CONFIG_BIAS_PULL_UP: 376 ret = meson_pinconf_enable_bias(pc, pin, true); 377 break; 378 case PIN_CONFIG_BIAS_PULL_DOWN: 379 ret = meson_pinconf_enable_bias(pc, pin, false); 380 break; 381 case PIN_CONFIG_DRIVE_STRENGTH_UA: 382 ret = meson_pinconf_set_drive_strength(pc, pin, arg); 383 break; 384 case PIN_CONFIG_OUTPUT_ENABLE: 385 ret = meson_pinconf_set_output(pc, pin, arg); 386 break; 387 case PIN_CONFIG_OUTPUT: 388 ret = meson_pinconf_set_output_drive(pc, pin, arg); 389 break; 390 default: 391 ret = -ENOTSUPP; 392 } 393 394 if (ret) 395 return ret; 396 } 397 398 return 0; 399 } 400 401 static int meson_pinconf_get_pull(struct meson_pinctrl *pc, unsigned int pin) 402 { 403 struct meson_bank *bank; 404 unsigned int reg, bit, val; 405 int ret, conf; 406 407 ret = meson_get_bank(pc, pin, &bank); 408 if (ret) 409 return ret; 410 411 meson_calc_reg_and_bit(bank, pin, MESON_REG_PULLEN, ®, &bit); 412 413 ret = regmap_read(pc->reg_pullen, reg, &val); 414 if (ret) 415 return ret; 416 417 if (!(val & BIT(bit))) { 418 conf = PIN_CONFIG_BIAS_DISABLE; 419 } else { 420 meson_calc_reg_and_bit(bank, pin, MESON_REG_PULL, ®, &bit); 421 422 ret = regmap_read(pc->reg_pull, reg, &val); 423 if (ret) 424 return ret; 425 426 if (val & BIT(bit)) 427 conf = PIN_CONFIG_BIAS_PULL_UP; 428 else 429 conf = PIN_CONFIG_BIAS_PULL_DOWN; 430 } 431 432 return conf; 433 } 434 435 static int meson_pinconf_get_drive_strength(struct meson_pinctrl *pc, 436 unsigned int pin, 437 u16 *drive_strength_ua) 438 { 439 struct meson_bank *bank; 440 unsigned int reg, bit; 441 unsigned int val; 442 int ret; 443 444 if (!pc->reg_ds) 445 return -ENOTSUPP; 446 447 ret = meson_get_bank(pc, pin, &bank); 448 if (ret) 449 return ret; 450 451 meson_calc_reg_and_bit(bank, pin, MESON_REG_DS, ®, &bit); 452 453 ret = regmap_read(pc->reg_ds, reg, &val); 454 if (ret) 455 return ret; 456 457 switch ((val >> bit) & 0x3) { 458 case MESON_PINCONF_DRV_500UA: 459 *drive_strength_ua = 500; 460 break; 461 case MESON_PINCONF_DRV_2500UA: 462 *drive_strength_ua = 2500; 463 break; 464 case MESON_PINCONF_DRV_3000UA: 465 *drive_strength_ua = 3000; 466 break; 467 case MESON_PINCONF_DRV_4000UA: 468 *drive_strength_ua = 4000; 469 break; 470 default: 471 return -EINVAL; 472 } 473 474 return 0; 475 } 476 477 static int meson_pinconf_get(struct pinctrl_dev *pcdev, unsigned int pin, 478 unsigned long *config) 479 { 480 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 481 enum pin_config_param param = pinconf_to_config_param(*config); 482 u16 arg; 483 int ret; 484 485 switch (param) { 486 case PIN_CONFIG_BIAS_DISABLE: 487 case PIN_CONFIG_BIAS_PULL_DOWN: 488 case PIN_CONFIG_BIAS_PULL_UP: 489 if (meson_pinconf_get_pull(pc, pin) == param) 490 arg = 1; 491 else 492 return -EINVAL; 493 break; 494 case PIN_CONFIG_DRIVE_STRENGTH_UA: 495 ret = meson_pinconf_get_drive_strength(pc, pin, &arg); 496 if (ret) 497 return ret; 498 break; 499 case PIN_CONFIG_OUTPUT_ENABLE: 500 ret = meson_pinconf_get_output(pc, pin); 501 if (ret <= 0) 502 return -EINVAL; 503 arg = 1; 504 break; 505 case PIN_CONFIG_OUTPUT: 506 ret = meson_pinconf_get_output(pc, pin); 507 if (ret <= 0) 508 return -EINVAL; 509 510 ret = meson_pinconf_get_drive(pc, pin); 511 if (ret < 0) 512 return -EINVAL; 513 514 arg = ret; 515 break; 516 517 default: 518 return -ENOTSUPP; 519 } 520 521 *config = pinconf_to_config_packed(param, arg); 522 dev_dbg(pc->dev, "pinconf for pin %u is %lu\n", pin, *config); 523 524 return 0; 525 } 526 527 static int meson_pinconf_group_set(struct pinctrl_dev *pcdev, 528 unsigned int num_group, 529 unsigned long *configs, unsigned num_configs) 530 { 531 struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev); 532 struct meson_pmx_group *group = &pc->data->groups[num_group]; 533 int i; 534 535 dev_dbg(pc->dev, "set pinconf for group %s\n", group->name); 536 537 for (i = 0; i < group->num_pins; i++) { 538 meson_pinconf_set(pcdev, group->pins[i], configs, 539 num_configs); 540 } 541 542 return 0; 543 } 544 545 static int meson_pinconf_group_get(struct pinctrl_dev *pcdev, 546 unsigned int group, unsigned long *config) 547 { 548 return -ENOTSUPP; 549 } 550 551 static const struct pinconf_ops meson_pinconf_ops = { 552 .pin_config_get = meson_pinconf_get, 553 .pin_config_set = meson_pinconf_set, 554 .pin_config_group_get = meson_pinconf_group_get, 555 .pin_config_group_set = meson_pinconf_group_set, 556 .is_generic = true, 557 }; 558 559 static int meson_gpio_get_direction(struct gpio_chip *chip, unsigned gpio) 560 { 561 struct meson_pinctrl *pc = gpiochip_get_data(chip); 562 int ret; 563 564 ret = meson_pinconf_get_output(pc, gpio); 565 if (ret < 0) 566 return ret; 567 568 return ret ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN; 569 } 570 571 static int meson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) 572 { 573 return meson_pinconf_set_output(gpiochip_get_data(chip), gpio, false); 574 } 575 576 static int meson_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, 577 int value) 578 { 579 return meson_pinconf_set_output_drive(gpiochip_get_data(chip), 580 gpio, value); 581 } 582 583 static void meson_gpio_set(struct gpio_chip *chip, unsigned gpio, int value) 584 { 585 meson_pinconf_set_drive(gpiochip_get_data(chip), gpio, value); 586 } 587 588 static int meson_gpio_get(struct gpio_chip *chip, unsigned gpio) 589 { 590 struct meson_pinctrl *pc = gpiochip_get_data(chip); 591 unsigned int reg, bit, val; 592 struct meson_bank *bank; 593 int ret; 594 595 ret = meson_get_bank(pc, gpio, &bank); 596 if (ret) 597 return ret; 598 599 meson_calc_reg_and_bit(bank, gpio, MESON_REG_IN, ®, &bit); 600 regmap_read(pc->reg_gpio, reg, &val); 601 602 return !!(val & BIT(bit)); 603 } 604 605 static int meson_gpiolib_register(struct meson_pinctrl *pc) 606 { 607 int ret; 608 609 pc->chip.label = pc->data->name; 610 pc->chip.parent = pc->dev; 611 pc->chip.fwnode = pc->fwnode; 612 pc->chip.request = gpiochip_generic_request; 613 pc->chip.free = gpiochip_generic_free; 614 pc->chip.set_config = gpiochip_generic_config; 615 pc->chip.get_direction = meson_gpio_get_direction; 616 pc->chip.direction_input = meson_gpio_direction_input; 617 pc->chip.direction_output = meson_gpio_direction_output; 618 pc->chip.get = meson_gpio_get; 619 pc->chip.set = meson_gpio_set; 620 pc->chip.base = -1; 621 pc->chip.ngpio = pc->data->num_pins; 622 pc->chip.can_sleep = false; 623 624 ret = gpiochip_add_data(&pc->chip, pc); 625 if (ret) { 626 dev_err(pc->dev, "can't add gpio chip %s\n", 627 pc->data->name); 628 return ret; 629 } 630 631 return 0; 632 } 633 634 static struct regmap_config meson_regmap_config = { 635 .reg_bits = 32, 636 .val_bits = 32, 637 .reg_stride = 4, 638 }; 639 640 static struct regmap *meson_map_resource(struct meson_pinctrl *pc, 641 struct device_node *node, char *name) 642 { 643 struct resource res; 644 void __iomem *base; 645 int i; 646 647 i = of_property_match_string(node, "reg-names", name); 648 if (of_address_to_resource(node, i, &res)) 649 return NULL; 650 651 base = devm_ioremap_resource(pc->dev, &res); 652 if (IS_ERR(base)) 653 return ERR_CAST(base); 654 655 meson_regmap_config.max_register = resource_size(&res) - 4; 656 meson_regmap_config.name = devm_kasprintf(pc->dev, GFP_KERNEL, 657 "%pOFn-%s", node, 658 name); 659 if (!meson_regmap_config.name) 660 return ERR_PTR(-ENOMEM); 661 662 return devm_regmap_init_mmio(pc->dev, base, &meson_regmap_config); 663 } 664 665 static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc) 666 { 667 struct device_node *gpio_np; 668 unsigned int chips; 669 670 chips = gpiochip_node_count(pc->dev); 671 if (!chips) { 672 dev_err(pc->dev, "no gpio node found\n"); 673 return -EINVAL; 674 } 675 if (chips > 1) { 676 dev_err(pc->dev, "multiple gpio nodes\n"); 677 return -EINVAL; 678 } 679 680 pc->fwnode = gpiochip_node_get_first(pc->dev); 681 gpio_np = to_of_node(pc->fwnode); 682 683 pc->reg_mux = meson_map_resource(pc, gpio_np, "mux"); 684 if (IS_ERR_OR_NULL(pc->reg_mux)) { 685 dev_err(pc->dev, "mux registers not found\n"); 686 return pc->reg_mux ? PTR_ERR(pc->reg_mux) : -ENOENT; 687 } 688 689 pc->reg_gpio = meson_map_resource(pc, gpio_np, "gpio"); 690 if (IS_ERR_OR_NULL(pc->reg_gpio)) { 691 dev_err(pc->dev, "gpio registers not found\n"); 692 return pc->reg_gpio ? PTR_ERR(pc->reg_gpio) : -ENOENT; 693 } 694 695 pc->reg_pull = meson_map_resource(pc, gpio_np, "pull"); 696 if (IS_ERR(pc->reg_pull)) 697 pc->reg_pull = NULL; 698 699 pc->reg_pullen = meson_map_resource(pc, gpio_np, "pull-enable"); 700 if (IS_ERR(pc->reg_pullen)) 701 pc->reg_pullen = NULL; 702 703 pc->reg_ds = meson_map_resource(pc, gpio_np, "ds"); 704 if (IS_ERR(pc->reg_ds)) { 705 dev_dbg(pc->dev, "ds registers not found - skipping\n"); 706 pc->reg_ds = NULL; 707 } 708 709 if (pc->data->parse_dt) 710 return pc->data->parse_dt(pc); 711 712 return 0; 713 } 714 715 int meson8_aobus_parse_dt_extra(struct meson_pinctrl *pc) 716 { 717 if (!pc->reg_pull) 718 return -EINVAL; 719 720 pc->reg_pullen = pc->reg_pull; 721 722 return 0; 723 } 724 EXPORT_SYMBOL_GPL(meson8_aobus_parse_dt_extra); 725 726 int meson_a1_parse_dt_extra(struct meson_pinctrl *pc) 727 { 728 pc->reg_pull = pc->reg_gpio; 729 pc->reg_pullen = pc->reg_gpio; 730 pc->reg_ds = pc->reg_gpio; 731 732 return 0; 733 } 734 EXPORT_SYMBOL_GPL(meson_a1_parse_dt_extra); 735 736 int meson_pinctrl_probe(struct platform_device *pdev) 737 { 738 struct device *dev = &pdev->dev; 739 struct meson_pinctrl *pc; 740 int ret; 741 742 pc = devm_kzalloc(dev, sizeof(struct meson_pinctrl), GFP_KERNEL); 743 if (!pc) 744 return -ENOMEM; 745 746 pc->dev = dev; 747 pc->data = (struct meson_pinctrl_data *) of_device_get_match_data(dev); 748 749 ret = meson_pinctrl_parse_dt(pc); 750 if (ret) 751 return ret; 752 753 pc->desc.name = "pinctrl-meson"; 754 pc->desc.owner = THIS_MODULE; 755 pc->desc.pctlops = &meson_pctrl_ops; 756 pc->desc.pmxops = pc->data->pmx_ops; 757 pc->desc.confops = &meson_pinconf_ops; 758 pc->desc.pins = pc->data->pins; 759 pc->desc.npins = pc->data->num_pins; 760 761 pc->pcdev = devm_pinctrl_register(pc->dev, &pc->desc, pc); 762 if (IS_ERR(pc->pcdev)) { 763 dev_err(pc->dev, "can't register pinctrl device"); 764 return PTR_ERR(pc->pcdev); 765 } 766 767 return meson_gpiolib_register(pc); 768 } 769 EXPORT_SYMBOL_GPL(meson_pinctrl_probe); 770 771 MODULE_LICENSE("GPL v2"); 772