1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015, Sony Mobile Communications AB. 4 * Copyright (c) 2013, The Linux Foundation. All rights reserved. 5 */ 6 7 #include <linux/gpio/driver.h> 8 #include <linux/interrupt.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/of_irq.h> 12 #include <linux/platform_device.h> 13 #include <linux/regmap.h> 14 #include <linux/seq_file.h> 15 #include <linux/slab.h> 16 17 #include <linux/pinctrl/pinconf-generic.h> 18 #include <linux/pinctrl/pinconf.h> 19 #include <linux/pinctrl/pinctrl.h> 20 #include <linux/pinctrl/pinmux.h> 21 22 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h> 23 24 #include "../core.h" 25 #include "../pinctrl-utils.h" 26 27 /* mode */ 28 #define PM8XXX_GPIO_MODE_ENABLED BIT(0) 29 #define PM8XXX_GPIO_MODE_INPUT 0 30 #define PM8XXX_GPIO_MODE_OUTPUT 2 31 32 /* output buffer */ 33 #define PM8XXX_GPIO_PUSH_PULL 0 34 #define PM8XXX_GPIO_OPEN_DRAIN 1 35 36 /* bias */ 37 #define PM8XXX_GPIO_BIAS_PU_30 0 38 #define PM8XXX_GPIO_BIAS_PU_1P5 1 39 #define PM8XXX_GPIO_BIAS_PU_31P5 2 40 #define PM8XXX_GPIO_BIAS_PU_1P5_30 3 41 #define PM8XXX_GPIO_BIAS_PD 4 42 #define PM8XXX_GPIO_BIAS_NP 5 43 44 /* GPIO registers */ 45 #define SSBI_REG_ADDR_GPIO_BASE 0x150 46 #define SSBI_REG_ADDR_GPIO(n) (SSBI_REG_ADDR_GPIO_BASE + n) 47 48 #define PM8XXX_BANK_WRITE BIT(7) 49 50 #define PM8XXX_MAX_GPIOS 44 51 52 #define PM8XXX_GPIO_PHYSICAL_OFFSET 1 53 54 /* custom pinconf parameters */ 55 #define PM8XXX_QCOM_DRIVE_STRENGH (PIN_CONFIG_END + 1) 56 #define PM8XXX_QCOM_PULL_UP_STRENGTH (PIN_CONFIG_END + 2) 57 58 /** 59 * struct pm8xxx_pin_data - dynamic configuration for a pin 60 * @reg: address of the control register 61 * @power_source: logical selected voltage source, mapping in static data 62 * is used translate to register values 63 * @mode: operating mode for the pin (input/output) 64 * @open_drain: output buffer configured as open-drain (vs push-pull) 65 * @output_value: configured output value 66 * @bias: register view of configured bias 67 * @pull_up_strength: placeholder for selected pull up strength 68 * only used to configure bias when pull up is selected 69 * @output_strength: selector of output-strength 70 * @disable: pin disabled / configured as tristate 71 * @function: pinmux selector 72 * @inverted: pin logic is inverted 73 */ 74 struct pm8xxx_pin_data { 75 unsigned reg; 76 u8 power_source; 77 u8 mode; 78 bool open_drain; 79 bool output_value; 80 u8 bias; 81 u8 pull_up_strength; 82 u8 output_strength; 83 bool disable; 84 u8 function; 85 bool inverted; 86 }; 87 88 struct pm8xxx_gpio { 89 struct device *dev; 90 struct regmap *regmap; 91 struct pinctrl_dev *pctrl; 92 struct gpio_chip chip; 93 94 struct pinctrl_desc desc; 95 unsigned npins; 96 }; 97 98 static const struct pinconf_generic_params pm8xxx_gpio_bindings[] = { 99 {"qcom,drive-strength", PM8XXX_QCOM_DRIVE_STRENGH, 0}, 100 {"qcom,pull-up-strength", PM8XXX_QCOM_PULL_UP_STRENGTH, 0}, 101 }; 102 103 #ifdef CONFIG_DEBUG_FS 104 static const struct pin_config_item pm8xxx_conf_items[ARRAY_SIZE(pm8xxx_gpio_bindings)] = { 105 PCONFDUMP(PM8XXX_QCOM_DRIVE_STRENGH, "drive-strength", NULL, true), 106 PCONFDUMP(PM8XXX_QCOM_PULL_UP_STRENGTH, "pull up strength", NULL, true), 107 }; 108 #endif 109 110 static const char * const pm8xxx_groups[PM8XXX_MAX_GPIOS] = { 111 "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8", 112 "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15", 113 "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22", 114 "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29", 115 "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36", 116 "gpio37", "gpio38", "gpio39", "gpio40", "gpio41", "gpio42", "gpio43", 117 "gpio44", 118 }; 119 120 static const char * const pm8xxx_gpio_functions[] = { 121 PMIC_GPIO_FUNC_NORMAL, PMIC_GPIO_FUNC_PAIRED, 122 PMIC_GPIO_FUNC_FUNC1, PMIC_GPIO_FUNC_FUNC2, 123 PMIC_GPIO_FUNC_DTEST1, PMIC_GPIO_FUNC_DTEST2, 124 PMIC_GPIO_FUNC_DTEST3, PMIC_GPIO_FUNC_DTEST4, 125 }; 126 127 static int pm8xxx_read_bank(struct pm8xxx_gpio *pctrl, 128 struct pm8xxx_pin_data *pin, int bank) 129 { 130 unsigned int val = bank << 4; 131 int ret; 132 133 ret = regmap_write(pctrl->regmap, pin->reg, val); 134 if (ret) { 135 dev_err(pctrl->dev, "failed to select bank %d\n", bank); 136 return ret; 137 } 138 139 ret = regmap_read(pctrl->regmap, pin->reg, &val); 140 if (ret) { 141 dev_err(pctrl->dev, "failed to read register %d\n", bank); 142 return ret; 143 } 144 145 return val; 146 } 147 148 static int pm8xxx_write_bank(struct pm8xxx_gpio *pctrl, 149 struct pm8xxx_pin_data *pin, 150 int bank, 151 u8 val) 152 { 153 int ret; 154 155 val |= PM8XXX_BANK_WRITE; 156 val |= bank << 4; 157 158 ret = regmap_write(pctrl->regmap, pin->reg, val); 159 if (ret) 160 dev_err(pctrl->dev, "failed to write register\n"); 161 162 return ret; 163 } 164 165 static int pm8xxx_get_groups_count(struct pinctrl_dev *pctldev) 166 { 167 struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev); 168 169 return pctrl->npins; 170 } 171 172 static const char *pm8xxx_get_group_name(struct pinctrl_dev *pctldev, 173 unsigned group) 174 { 175 return pm8xxx_groups[group]; 176 } 177 178 179 static int pm8xxx_get_group_pins(struct pinctrl_dev *pctldev, 180 unsigned group, 181 const unsigned **pins, 182 unsigned *num_pins) 183 { 184 struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev); 185 186 *pins = &pctrl->desc.pins[group].number; 187 *num_pins = 1; 188 189 return 0; 190 } 191 192 static const struct pinctrl_ops pm8xxx_pinctrl_ops = { 193 .get_groups_count = pm8xxx_get_groups_count, 194 .get_group_name = pm8xxx_get_group_name, 195 .get_group_pins = pm8xxx_get_group_pins, 196 .dt_node_to_map = pinconf_generic_dt_node_to_map_group, 197 .dt_free_map = pinctrl_utils_free_map, 198 }; 199 200 static int pm8xxx_get_functions_count(struct pinctrl_dev *pctldev) 201 { 202 return ARRAY_SIZE(pm8xxx_gpio_functions); 203 } 204 205 static const char *pm8xxx_get_function_name(struct pinctrl_dev *pctldev, 206 unsigned function) 207 { 208 return pm8xxx_gpio_functions[function]; 209 } 210 211 static int pm8xxx_get_function_groups(struct pinctrl_dev *pctldev, 212 unsigned function, 213 const char * const **groups, 214 unsigned * const num_groups) 215 { 216 struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev); 217 218 *groups = pm8xxx_groups; 219 *num_groups = pctrl->npins; 220 return 0; 221 } 222 223 static int pm8xxx_pinmux_set_mux(struct pinctrl_dev *pctldev, 224 unsigned function, 225 unsigned group) 226 { 227 struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev); 228 struct pm8xxx_pin_data *pin = pctrl->desc.pins[group].drv_data; 229 u8 val; 230 231 pin->function = function; 232 val = pin->function << 1; 233 234 pm8xxx_write_bank(pctrl, pin, 4, val); 235 236 return 0; 237 } 238 239 static const struct pinmux_ops pm8xxx_pinmux_ops = { 240 .get_functions_count = pm8xxx_get_functions_count, 241 .get_function_name = pm8xxx_get_function_name, 242 .get_function_groups = pm8xxx_get_function_groups, 243 .set_mux = pm8xxx_pinmux_set_mux, 244 }; 245 246 static int pm8xxx_pin_config_get(struct pinctrl_dev *pctldev, 247 unsigned int offset, 248 unsigned long *config) 249 { 250 struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev); 251 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 252 unsigned param = pinconf_to_config_param(*config); 253 unsigned arg; 254 255 switch (param) { 256 case PIN_CONFIG_BIAS_DISABLE: 257 if (pin->bias != PM8XXX_GPIO_BIAS_NP) 258 return -EINVAL; 259 arg = 1; 260 break; 261 case PIN_CONFIG_BIAS_PULL_DOWN: 262 if (pin->bias != PM8XXX_GPIO_BIAS_PD) 263 return -EINVAL; 264 arg = 1; 265 break; 266 case PIN_CONFIG_BIAS_PULL_UP: 267 if (pin->bias > PM8XXX_GPIO_BIAS_PU_1P5_30) 268 return -EINVAL; 269 arg = 1; 270 break; 271 case PM8XXX_QCOM_PULL_UP_STRENGTH: 272 arg = pin->pull_up_strength; 273 break; 274 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: 275 if (!pin->disable) 276 return -EINVAL; 277 arg = 1; 278 break; 279 case PIN_CONFIG_INPUT_ENABLE: 280 if (pin->mode != PM8XXX_GPIO_MODE_INPUT) 281 return -EINVAL; 282 arg = 1; 283 break; 284 case PIN_CONFIG_OUTPUT: 285 if (pin->mode & PM8XXX_GPIO_MODE_OUTPUT) 286 arg = pin->output_value; 287 else 288 arg = 0; 289 break; 290 case PIN_CONFIG_POWER_SOURCE: 291 arg = pin->power_source; 292 break; 293 case PM8XXX_QCOM_DRIVE_STRENGH: 294 arg = pin->output_strength; 295 break; 296 case PIN_CONFIG_DRIVE_PUSH_PULL: 297 if (pin->open_drain) 298 return -EINVAL; 299 arg = 1; 300 break; 301 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 302 if (!pin->open_drain) 303 return -EINVAL; 304 arg = 1; 305 break; 306 default: 307 return -EINVAL; 308 } 309 310 *config = pinconf_to_config_packed(param, arg); 311 312 return 0; 313 } 314 315 static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev, 316 unsigned int offset, 317 unsigned long *configs, 318 unsigned num_configs) 319 { 320 struct pm8xxx_gpio *pctrl = pinctrl_dev_get_drvdata(pctldev); 321 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 322 unsigned param; 323 unsigned arg; 324 unsigned i; 325 u8 banks = 0; 326 u8 val; 327 328 for (i = 0; i < num_configs; i++) { 329 param = pinconf_to_config_param(configs[i]); 330 arg = pinconf_to_config_argument(configs[i]); 331 332 switch (param) { 333 case PIN_CONFIG_BIAS_DISABLE: 334 pin->bias = PM8XXX_GPIO_BIAS_NP; 335 banks |= BIT(2); 336 pin->disable = 0; 337 banks |= BIT(3); 338 break; 339 case PIN_CONFIG_BIAS_PULL_DOWN: 340 pin->bias = PM8XXX_GPIO_BIAS_PD; 341 banks |= BIT(2); 342 pin->disable = 0; 343 banks |= BIT(3); 344 break; 345 case PM8XXX_QCOM_PULL_UP_STRENGTH: 346 if (arg > PM8XXX_GPIO_BIAS_PU_1P5_30) { 347 dev_err(pctrl->dev, "invalid pull-up strength\n"); 348 return -EINVAL; 349 } 350 pin->pull_up_strength = arg; 351 fallthrough; 352 case PIN_CONFIG_BIAS_PULL_UP: 353 pin->bias = pin->pull_up_strength; 354 banks |= BIT(2); 355 pin->disable = 0; 356 banks |= BIT(3); 357 break; 358 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: 359 pin->disable = 1; 360 banks |= BIT(3); 361 break; 362 case PIN_CONFIG_INPUT_ENABLE: 363 pin->mode = PM8XXX_GPIO_MODE_INPUT; 364 banks |= BIT(0) | BIT(1); 365 break; 366 case PIN_CONFIG_OUTPUT: 367 pin->mode = PM8XXX_GPIO_MODE_OUTPUT; 368 pin->output_value = !!arg; 369 banks |= BIT(0) | BIT(1); 370 break; 371 case PIN_CONFIG_POWER_SOURCE: 372 pin->power_source = arg; 373 banks |= BIT(0); 374 break; 375 case PM8XXX_QCOM_DRIVE_STRENGH: 376 if (arg > PMIC_GPIO_STRENGTH_LOW) { 377 dev_err(pctrl->dev, "invalid drive strength\n"); 378 return -EINVAL; 379 } 380 pin->output_strength = arg; 381 banks |= BIT(3); 382 break; 383 case PIN_CONFIG_DRIVE_PUSH_PULL: 384 pin->open_drain = 0; 385 banks |= BIT(1); 386 break; 387 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 388 pin->open_drain = 1; 389 banks |= BIT(1); 390 break; 391 default: 392 dev_err(pctrl->dev, 393 "unsupported config parameter: %x\n", 394 param); 395 return -EINVAL; 396 } 397 } 398 399 if (banks & BIT(0)) { 400 val = pin->power_source << 1; 401 val |= PM8XXX_GPIO_MODE_ENABLED; 402 pm8xxx_write_bank(pctrl, pin, 0, val); 403 } 404 405 if (banks & BIT(1)) { 406 val = pin->mode << 2; 407 val |= pin->open_drain << 1; 408 val |= pin->output_value; 409 pm8xxx_write_bank(pctrl, pin, 1, val); 410 } 411 412 if (banks & BIT(2)) { 413 val = pin->bias << 1; 414 pm8xxx_write_bank(pctrl, pin, 2, val); 415 } 416 417 if (banks & BIT(3)) { 418 val = pin->output_strength << 2; 419 val |= pin->disable; 420 pm8xxx_write_bank(pctrl, pin, 3, val); 421 } 422 423 if (banks & BIT(4)) { 424 val = pin->function << 1; 425 pm8xxx_write_bank(pctrl, pin, 4, val); 426 } 427 428 if (banks & BIT(5)) { 429 val = 0; 430 if (!pin->inverted) 431 val |= BIT(3); 432 pm8xxx_write_bank(pctrl, pin, 5, val); 433 } 434 435 return 0; 436 } 437 438 static const struct pinconf_ops pm8xxx_pinconf_ops = { 439 .is_generic = true, 440 .pin_config_group_get = pm8xxx_pin_config_get, 441 .pin_config_group_set = pm8xxx_pin_config_set, 442 }; 443 444 static const struct pinctrl_desc pm8xxx_pinctrl_desc = { 445 .name = "pm8xxx_gpio", 446 .pctlops = &pm8xxx_pinctrl_ops, 447 .pmxops = &pm8xxx_pinmux_ops, 448 .confops = &pm8xxx_pinconf_ops, 449 .owner = THIS_MODULE, 450 }; 451 452 static int pm8xxx_gpio_direction_input(struct gpio_chip *chip, 453 unsigned offset) 454 { 455 struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip); 456 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 457 u8 val; 458 459 pin->mode = PM8XXX_GPIO_MODE_INPUT; 460 val = pin->mode << 2; 461 462 pm8xxx_write_bank(pctrl, pin, 1, val); 463 464 return 0; 465 } 466 467 static int pm8xxx_gpio_direction_output(struct gpio_chip *chip, 468 unsigned offset, 469 int value) 470 { 471 struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip); 472 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 473 u8 val; 474 475 pin->mode = PM8XXX_GPIO_MODE_OUTPUT; 476 pin->output_value = !!value; 477 478 val = pin->mode << 2; 479 val |= pin->open_drain << 1; 480 val |= pin->output_value; 481 482 pm8xxx_write_bank(pctrl, pin, 1, val); 483 484 return 0; 485 } 486 487 static int pm8xxx_gpio_get(struct gpio_chip *chip, unsigned offset) 488 { 489 struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip); 490 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 491 int ret, irq; 492 bool state; 493 494 if (pin->mode == PM8XXX_GPIO_MODE_OUTPUT) 495 return pin->output_value; 496 497 irq = chip->to_irq(chip, offset); 498 if (irq >= 0) { 499 ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, 500 &state); 501 if (!ret) 502 ret = !!state; 503 } else 504 ret = -EINVAL; 505 506 return ret; 507 } 508 509 static void pm8xxx_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 510 { 511 struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip); 512 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 513 u8 val; 514 515 pin->output_value = !!value; 516 517 val = pin->mode << 2; 518 val |= pin->open_drain << 1; 519 val |= pin->output_value; 520 521 pm8xxx_write_bank(pctrl, pin, 1, val); 522 } 523 524 static int pm8xxx_gpio_of_xlate(struct gpio_chip *chip, 525 const struct of_phandle_args *gpio_desc, 526 u32 *flags) 527 { 528 if (chip->of_gpio_n_cells < 2) 529 return -EINVAL; 530 531 if (flags) 532 *flags = gpio_desc->args[1]; 533 534 return gpio_desc->args[0] - PM8XXX_GPIO_PHYSICAL_OFFSET; 535 } 536 537 538 #ifdef CONFIG_DEBUG_FS 539 540 static void pm8xxx_gpio_dbg_show_one(struct seq_file *s, 541 struct pinctrl_dev *pctldev, 542 struct gpio_chip *chip, 543 unsigned offset, 544 unsigned gpio) 545 { 546 struct pm8xxx_gpio *pctrl = gpiochip_get_data(chip); 547 struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; 548 549 static const char * const modes[] = { 550 "in", "both", "out", "off" 551 }; 552 static const char * const biases[] = { 553 "pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA", 554 "pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull" 555 }; 556 static const char * const buffer_types[] = { 557 "push-pull", "open-drain" 558 }; 559 static const char * const strengths[] = { 560 "no", "high", "medium", "low" 561 }; 562 563 seq_printf(s, " gpio%-2d:", offset + PM8XXX_GPIO_PHYSICAL_OFFSET); 564 if (pin->disable) { 565 seq_puts(s, " ---"); 566 } else { 567 seq_printf(s, " %-4s", modes[pin->mode]); 568 seq_printf(s, " %-7s", pm8xxx_gpio_functions[pin->function]); 569 seq_printf(s, " VIN%d", pin->power_source); 570 seq_printf(s, " %-27s", biases[pin->bias]); 571 seq_printf(s, " %-10s", buffer_types[pin->open_drain]); 572 seq_printf(s, " %-4s", pin->output_value ? "high" : "low"); 573 seq_printf(s, " %-7s", strengths[pin->output_strength]); 574 if (pin->inverted) 575 seq_puts(s, " inverted"); 576 } 577 } 578 579 static void pm8xxx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) 580 { 581 unsigned gpio = chip->base; 582 unsigned i; 583 584 for (i = 0; i < chip->ngpio; i++, gpio++) { 585 pm8xxx_gpio_dbg_show_one(s, NULL, chip, i, gpio); 586 seq_puts(s, "\n"); 587 } 588 } 589 590 #else 591 #define pm8xxx_gpio_dbg_show NULL 592 #endif 593 594 static const struct gpio_chip pm8xxx_gpio_template = { 595 .direction_input = pm8xxx_gpio_direction_input, 596 .direction_output = pm8xxx_gpio_direction_output, 597 .get = pm8xxx_gpio_get, 598 .set = pm8xxx_gpio_set, 599 .of_xlate = pm8xxx_gpio_of_xlate, 600 .dbg_show = pm8xxx_gpio_dbg_show, 601 .owner = THIS_MODULE, 602 }; 603 604 static int pm8xxx_pin_populate(struct pm8xxx_gpio *pctrl, 605 struct pm8xxx_pin_data *pin) 606 { 607 int val; 608 609 val = pm8xxx_read_bank(pctrl, pin, 0); 610 if (val < 0) 611 return val; 612 613 pin->power_source = (val >> 1) & 0x7; 614 615 val = pm8xxx_read_bank(pctrl, pin, 1); 616 if (val < 0) 617 return val; 618 619 pin->mode = (val >> 2) & 0x3; 620 pin->open_drain = !!(val & BIT(1)); 621 pin->output_value = val & BIT(0); 622 623 val = pm8xxx_read_bank(pctrl, pin, 2); 624 if (val < 0) 625 return val; 626 627 pin->bias = (val >> 1) & 0x7; 628 if (pin->bias <= PM8XXX_GPIO_BIAS_PU_1P5_30) 629 pin->pull_up_strength = pin->bias; 630 else 631 pin->pull_up_strength = PM8XXX_GPIO_BIAS_PU_30; 632 633 val = pm8xxx_read_bank(pctrl, pin, 3); 634 if (val < 0) 635 return val; 636 637 pin->output_strength = (val >> 2) & 0x3; 638 pin->disable = val & BIT(0); 639 640 val = pm8xxx_read_bank(pctrl, pin, 4); 641 if (val < 0) 642 return val; 643 644 pin->function = (val >> 1) & 0x7; 645 646 val = pm8xxx_read_bank(pctrl, pin, 5); 647 if (val < 0) 648 return val; 649 650 pin->inverted = !(val & BIT(3)); 651 652 return 0; 653 } 654 655 static void pm8xxx_irq_disable(struct irq_data *d) 656 { 657 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 658 659 gpiochip_disable_irq(gc, irqd_to_hwirq(d)); 660 } 661 662 static void pm8xxx_irq_enable(struct irq_data *d) 663 { 664 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 665 666 gpiochip_enable_irq(gc, irqd_to_hwirq(d)); 667 } 668 669 static const struct irq_chip pm8xxx_irq_chip = { 670 .name = "ssbi-gpio", 671 .irq_mask_ack = irq_chip_mask_ack_parent, 672 .irq_unmask = irq_chip_unmask_parent, 673 .irq_disable = pm8xxx_irq_disable, 674 .irq_enable = pm8xxx_irq_enable, 675 .irq_set_type = irq_chip_set_type_parent, 676 .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE | 677 IRQCHIP_IMMUTABLE, 678 GPIOCHIP_IRQ_RESOURCE_HELPERS, 679 }; 680 681 static int pm8xxx_domain_translate(struct irq_domain *domain, 682 struct irq_fwspec *fwspec, 683 unsigned long *hwirq, 684 unsigned int *type) 685 { 686 struct pm8xxx_gpio *pctrl = container_of(domain->host_data, 687 struct pm8xxx_gpio, chip); 688 689 if (fwspec->param_count != 2 || fwspec->param[0] < 1 || 690 fwspec->param[0] > pctrl->chip.ngpio) 691 return -EINVAL; 692 693 *hwirq = fwspec->param[0] - PM8XXX_GPIO_PHYSICAL_OFFSET; 694 *type = fwspec->param[1]; 695 696 return 0; 697 } 698 699 static unsigned int pm8xxx_child_offset_to_irq(struct gpio_chip *chip, 700 unsigned int offset) 701 { 702 return offset + PM8XXX_GPIO_PHYSICAL_OFFSET; 703 } 704 705 static int pm8xxx_child_to_parent_hwirq(struct gpio_chip *chip, 706 unsigned int child_hwirq, 707 unsigned int child_type, 708 unsigned int *parent_hwirq, 709 unsigned int *parent_type) 710 { 711 *parent_hwirq = child_hwirq + 0xc0; 712 *parent_type = child_type; 713 714 return 0; 715 } 716 717 static const struct of_device_id pm8xxx_gpio_of_match[] = { 718 { .compatible = "qcom,pm8018-gpio", .data = (void *) 6 }, 719 { .compatible = "qcom,pm8038-gpio", .data = (void *) 12 }, 720 { .compatible = "qcom,pm8058-gpio", .data = (void *) 44 }, 721 { .compatible = "qcom,pm8917-gpio", .data = (void *) 38 }, 722 { .compatible = "qcom,pm8921-gpio", .data = (void *) 44 }, 723 { }, 724 }; 725 MODULE_DEVICE_TABLE(of, pm8xxx_gpio_of_match); 726 727 static int pm8xxx_gpio_probe(struct platform_device *pdev) 728 { 729 struct pm8xxx_pin_data *pin_data; 730 struct irq_domain *parent_domain; 731 struct device_node *parent_node; 732 struct pinctrl_pin_desc *pins; 733 struct gpio_irq_chip *girq; 734 struct pm8xxx_gpio *pctrl; 735 int ret, i; 736 737 pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); 738 if (!pctrl) 739 return -ENOMEM; 740 741 pctrl->dev = &pdev->dev; 742 pctrl->npins = (uintptr_t) device_get_match_data(&pdev->dev); 743 744 pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL); 745 if (!pctrl->regmap) { 746 dev_err(&pdev->dev, "parent regmap unavailable\n"); 747 return -ENXIO; 748 } 749 750 pctrl->desc = pm8xxx_pinctrl_desc; 751 pctrl->desc.npins = pctrl->npins; 752 753 pins = devm_kcalloc(&pdev->dev, 754 pctrl->desc.npins, 755 sizeof(struct pinctrl_pin_desc), 756 GFP_KERNEL); 757 if (!pins) 758 return -ENOMEM; 759 760 pin_data = devm_kcalloc(&pdev->dev, 761 pctrl->desc.npins, 762 sizeof(struct pm8xxx_pin_data), 763 GFP_KERNEL); 764 if (!pin_data) 765 return -ENOMEM; 766 767 for (i = 0; i < pctrl->desc.npins; i++) { 768 pin_data[i].reg = SSBI_REG_ADDR_GPIO(i); 769 770 ret = pm8xxx_pin_populate(pctrl, &pin_data[i]); 771 if (ret) 772 return ret; 773 774 pins[i].number = i; 775 pins[i].name = pm8xxx_groups[i]; 776 pins[i].drv_data = &pin_data[i]; 777 } 778 pctrl->desc.pins = pins; 779 780 pctrl->desc.num_custom_params = ARRAY_SIZE(pm8xxx_gpio_bindings); 781 pctrl->desc.custom_params = pm8xxx_gpio_bindings; 782 #ifdef CONFIG_DEBUG_FS 783 pctrl->desc.custom_conf_items = pm8xxx_conf_items; 784 #endif 785 786 pctrl->pctrl = devm_pinctrl_register(&pdev->dev, &pctrl->desc, pctrl); 787 if (IS_ERR(pctrl->pctrl)) { 788 dev_err(&pdev->dev, "couldn't register pm8xxx gpio driver\n"); 789 return PTR_ERR(pctrl->pctrl); 790 } 791 792 pctrl->chip = pm8xxx_gpio_template; 793 pctrl->chip.base = -1; 794 pctrl->chip.parent = &pdev->dev; 795 pctrl->chip.of_gpio_n_cells = 2; 796 pctrl->chip.label = dev_name(pctrl->dev); 797 pctrl->chip.ngpio = pctrl->npins; 798 799 parent_node = of_irq_find_parent(pctrl->dev->of_node); 800 if (!parent_node) 801 return -ENXIO; 802 803 parent_domain = irq_find_host(parent_node); 804 of_node_put(parent_node); 805 if (!parent_domain) 806 return -ENXIO; 807 808 girq = &pctrl->chip.irq; 809 gpio_irq_chip_set_chip(girq, &pm8xxx_irq_chip); 810 girq->default_type = IRQ_TYPE_NONE; 811 girq->handler = handle_level_irq; 812 girq->fwnode = dev_fwnode(pctrl->dev); 813 girq->parent_domain = parent_domain; 814 girq->child_to_parent_hwirq = pm8xxx_child_to_parent_hwirq; 815 girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_twocell; 816 girq->child_offset_to_irq = pm8xxx_child_offset_to_irq; 817 girq->child_irq_domain_ops.translate = pm8xxx_domain_translate; 818 819 ret = gpiochip_add_data(&pctrl->chip, pctrl); 820 if (ret) { 821 dev_err(&pdev->dev, "failed register gpiochip\n"); 822 return ret; 823 } 824 825 /* 826 * For DeviceTree-supported systems, the gpio core checks the 827 * pinctrl's device node for the "gpio-ranges" property. 828 * If it is present, it takes care of adding the pin ranges 829 * for the driver. In this case the driver can skip ahead. 830 * 831 * In order to remain compatible with older, existing DeviceTree 832 * files which don't set the "gpio-ranges" property or systems that 833 * utilize ACPI the driver has to call gpiochip_add_pin_range(). 834 */ 835 if (!of_property_read_bool(pctrl->dev->of_node, "gpio-ranges")) { 836 ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev), 837 0, 0, pctrl->chip.ngpio); 838 if (ret) { 839 dev_err(pctrl->dev, "failed to add pin range\n"); 840 goto unregister_gpiochip; 841 } 842 } 843 844 platform_set_drvdata(pdev, pctrl); 845 846 dev_dbg(&pdev->dev, "Qualcomm pm8xxx gpio driver probed\n"); 847 848 return 0; 849 850 unregister_gpiochip: 851 gpiochip_remove(&pctrl->chip); 852 853 return ret; 854 } 855 856 static void pm8xxx_gpio_remove(struct platform_device *pdev) 857 { 858 struct pm8xxx_gpio *pctrl = platform_get_drvdata(pdev); 859 860 gpiochip_remove(&pctrl->chip); 861 } 862 863 static struct platform_driver pm8xxx_gpio_driver = { 864 .driver = { 865 .name = "qcom-ssbi-gpio", 866 .of_match_table = pm8xxx_gpio_of_match, 867 }, 868 .probe = pm8xxx_gpio_probe, 869 .remove_new = pm8xxx_gpio_remove, 870 }; 871 872 module_platform_driver(pm8xxx_gpio_driver); 873 874 MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); 875 MODULE_DESCRIPTION("Qualcomm PM8xxx GPIO driver"); 876 MODULE_LICENSE("GPL v2"); 877