1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Motorola Mapphone MDM6600 modem GPIO controlled USB PHY driver 4 * Copyright (C) 2018 Tony Lindgren <tony@atomide.com> 5 */ 6 7 #include <linux/delay.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/platform_device.h> 14 #include <linux/slab.h> 15 16 #include <linux/gpio/consumer.h> 17 #include <linux/of_platform.h> 18 #include <linux/phy/phy.h> 19 #include <linux/pinctrl/consumer.h> 20 21 #define PHY_MDM6600_PHY_DELAY_MS 4000 /* PHY enable 2.2s to 3.5s */ 22 #define PHY_MDM6600_ENABLED_DELAY_MS 8000 /* 8s more total for MDM6600 */ 23 #define MDM6600_MODEM_IDLE_DELAY_MS 1000 /* modem after USB suspend */ 24 #define MDM6600_MODEM_WAKE_DELAY_MS 200 /* modem response after idle */ 25 26 enum phy_mdm6600_ctrl_lines { 27 PHY_MDM6600_ENABLE, /* USB PHY enable */ 28 PHY_MDM6600_POWER, /* Device power */ 29 PHY_MDM6600_RESET, /* Device reset */ 30 PHY_MDM6600_NR_CTRL_LINES, 31 }; 32 33 enum phy_mdm6600_bootmode_lines { 34 PHY_MDM6600_MODE0, /* out USB mode0 and OOB wake */ 35 PHY_MDM6600_MODE1, /* out USB mode1, in OOB wake */ 36 PHY_MDM6600_NR_MODE_LINES, 37 }; 38 39 enum phy_mdm6600_cmd_lines { 40 PHY_MDM6600_CMD0, 41 PHY_MDM6600_CMD1, 42 PHY_MDM6600_CMD2, 43 PHY_MDM6600_NR_CMD_LINES, 44 }; 45 46 enum phy_mdm6600_status_lines { 47 PHY_MDM6600_STATUS0, 48 PHY_MDM6600_STATUS1, 49 PHY_MDM6600_STATUS2, 50 PHY_MDM6600_NR_STATUS_LINES, 51 }; 52 53 /* 54 * MDM6600 command codes. These are based on Motorola Mapphone Linux 55 * kernel tree. 56 */ 57 enum phy_mdm6600_cmd { 58 PHY_MDM6600_CMD_BP_PANIC_ACK, 59 PHY_MDM6600_CMD_DATA_ONLY_BYPASS, /* Reroute USB to CPCAP PHY */ 60 PHY_MDM6600_CMD_FULL_BYPASS, /* Reroute USB to CPCAP PHY */ 61 PHY_MDM6600_CMD_NO_BYPASS, /* Request normal USB mode */ 62 PHY_MDM6600_CMD_BP_SHUTDOWN_REQ, /* Request device power off */ 63 PHY_MDM6600_CMD_BP_UNKNOWN_5, 64 PHY_MDM6600_CMD_BP_UNKNOWN_6, 65 PHY_MDM6600_CMD_UNDEFINED, 66 }; 67 68 /* 69 * MDM6600 status codes. These are based on Motorola Mapphone Linux 70 * kernel tree. 71 */ 72 enum phy_mdm6600_status { 73 PHY_MDM6600_STATUS_PANIC, /* Seems to be really off */ 74 PHY_MDM6600_STATUS_PANIC_BUSY_WAIT, 75 PHY_MDM6600_STATUS_QC_DLOAD, 76 PHY_MDM6600_STATUS_RAM_DOWNLOADER, /* MDM6600 USB flashing mode */ 77 PHY_MDM6600_STATUS_PHONE_CODE_AWAKE, /* MDM6600 normal USB mode */ 78 PHY_MDM6600_STATUS_PHONE_CODE_ASLEEP, 79 PHY_MDM6600_STATUS_SHUTDOWN_ACK, 80 PHY_MDM6600_STATUS_UNDEFINED, 81 }; 82 83 static const char * const 84 phy_mdm6600_status_name[] = { 85 "off", "busy", "qc_dl", "ram_dl", "awake", 86 "asleep", "shutdown", "undefined", 87 }; 88 89 struct phy_mdm6600 { 90 struct device *dev; 91 struct phy *generic_phy; 92 struct phy_provider *phy_provider; 93 struct gpio_desc *ctrl_gpios[PHY_MDM6600_NR_CTRL_LINES]; 94 struct gpio_descs *mode_gpios; 95 struct gpio_descs *status_gpios; 96 struct gpio_descs *cmd_gpios; 97 struct delayed_work bootup_work; 98 struct delayed_work status_work; 99 struct delayed_work modem_wake_work; 100 struct completion ack; 101 bool enabled; /* mdm6600 phy enabled */ 102 bool running; /* mdm6600 boot done */ 103 bool awake; /* mdm6600 respnds on n_gsm */ 104 int status; 105 }; 106 107 static int phy_mdm6600_init(struct phy *x) 108 { 109 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 110 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 111 112 if (!ddata->enabled) 113 return -EPROBE_DEFER; 114 115 gpiod_set_value_cansleep(enable_gpio, 0); 116 117 return 0; 118 } 119 120 static int phy_mdm6600_power_on(struct phy *x) 121 { 122 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 123 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 124 int error; 125 126 if (!ddata->enabled) 127 return -ENODEV; 128 129 error = pinctrl_pm_select_default_state(ddata->dev); 130 if (error) 131 dev_warn(ddata->dev, "%s: error with default_state: %i\n", 132 __func__, error); 133 134 gpiod_set_value_cansleep(enable_gpio, 1); 135 136 /* Allow aggressive PM for USB, it's only needed for n_gsm port */ 137 if (pm_runtime_enabled(&x->dev)) 138 phy_pm_runtime_put(x); 139 140 return 0; 141 } 142 143 static int phy_mdm6600_power_off(struct phy *x) 144 { 145 struct phy_mdm6600 *ddata = phy_get_drvdata(x); 146 struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; 147 int error; 148 149 if (!ddata->enabled) 150 return -ENODEV; 151 152 /* Paired with phy_pm_runtime_put() in phy_mdm6600_power_on() */ 153 if (pm_runtime_enabled(&x->dev)) { 154 error = phy_pm_runtime_get(x); 155 if (error < 0 && error != -EINPROGRESS) 156 dev_warn(ddata->dev, "%s: phy_pm_runtime_get: %i\n", 157 __func__, error); 158 } 159 160 gpiod_set_value_cansleep(enable_gpio, 0); 161 162 error = pinctrl_pm_select_sleep_state(ddata->dev); 163 if (error) 164 dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", 165 __func__, error); 166 167 return 0; 168 } 169 170 static const struct phy_ops gpio_usb_ops = { 171 .init = phy_mdm6600_init, 172 .power_on = phy_mdm6600_power_on, 173 .power_off = phy_mdm6600_power_off, 174 .owner = THIS_MODULE, 175 }; 176 177 /** 178 * phy_mdm6600_cmd() - send a command request to mdm6600 179 * @ddata: device driver data 180 * 181 * Configures the three command request GPIOs to the specified value. 182 */ 183 static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val) 184 { 185 DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES); 186 187 values[0] = val; 188 189 gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES, 190 ddata->cmd_gpios->desc, 191 ddata->cmd_gpios->info, values); 192 } 193 194 /** 195 * phy_mdm6600_status() - read mdm6600 status lines 196 * @ddata: device driver data 197 */ 198 static void phy_mdm6600_status(struct work_struct *work) 199 { 200 struct phy_mdm6600 *ddata; 201 struct device *dev; 202 DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES); 203 int error; 204 205 ddata = container_of(work, struct phy_mdm6600, status_work.work); 206 dev = ddata->dev; 207 208 error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES, 209 ddata->status_gpios->desc, 210 ddata->status_gpios->info, 211 values); 212 if (error) 213 return; 214 215 ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1); 216 217 dev_info(dev, "modem status: %i %s\n", 218 ddata->status, 219 phy_mdm6600_status_name[ddata->status]); 220 complete(&ddata->ack); 221 } 222 223 static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data) 224 { 225 struct phy_mdm6600 *ddata = data; 226 227 schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10)); 228 229 return IRQ_HANDLED; 230 } 231 232 /** 233 * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting 234 * @irq: interrupt 235 * @data: interrupt handler data 236 * 237 * GPIO mode1 is used initially as output to configure the USB boot 238 * mode for mdm6600. After booting it is used as input for OOB wake 239 * signal from mdm6600 to the SoC. Just use it for debug info only 240 * for now. 241 */ 242 static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data) 243 { 244 struct phy_mdm6600 *ddata = data; 245 struct gpio_desc *mode_gpio1; 246 247 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 248 dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", 249 gpiod_get_value(mode_gpio1)); 250 251 return IRQ_HANDLED; 252 } 253 254 /** 255 * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines 256 * @ddata: device driver data 257 */ 258 static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata) 259 { 260 struct device *dev = ddata->dev; 261 int i, error, irq; 262 263 for (i = PHY_MDM6600_STATUS0; 264 i <= PHY_MDM6600_STATUS2; i++) { 265 struct gpio_desc *gpio = ddata->status_gpios->desc[i]; 266 267 irq = gpiod_to_irq(gpio); 268 if (irq <= 0) 269 continue; 270 271 error = devm_request_threaded_irq(dev, irq, NULL, 272 phy_mdm6600_irq_thread, 273 IRQF_TRIGGER_RISING | 274 IRQF_TRIGGER_FALLING | 275 IRQF_ONESHOT, 276 "mdm6600", 277 ddata); 278 if (error) 279 dev_warn(dev, "no modem status irq%i: %i\n", 280 irq, error); 281 } 282 } 283 284 struct phy_mdm6600_map { 285 const char *name; 286 int direction; 287 }; 288 289 static const struct phy_mdm6600_map 290 phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = { 291 { "enable", GPIOD_OUT_LOW, }, /* low = phy disabled */ 292 { "power", GPIOD_OUT_LOW, }, /* low = off */ 293 { "reset", GPIOD_OUT_HIGH, }, /* high = reset */ 294 }; 295 296 /** 297 * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines 298 * @ddata: device driver data 299 */ 300 static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata) 301 { 302 struct device *dev = ddata->dev; 303 int i; 304 305 /* MDM6600 control lines */ 306 for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) { 307 const struct phy_mdm6600_map *map = 308 &phy_mdm6600_ctrl_gpio_map[i]; 309 struct gpio_desc **gpio = &ddata->ctrl_gpios[i]; 310 311 *gpio = devm_gpiod_get(dev, map->name, map->direction); 312 if (IS_ERR(*gpio)) { 313 dev_info(dev, "gpio %s error %li\n", 314 map->name, PTR_ERR(*gpio)); 315 return PTR_ERR(*gpio); 316 } 317 } 318 319 /* MDM6600 USB start-up mode output lines */ 320 ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode", 321 GPIOD_OUT_LOW); 322 if (IS_ERR(ddata->mode_gpios)) 323 return PTR_ERR(ddata->mode_gpios); 324 325 if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES) 326 return -EINVAL; 327 328 /* MDM6600 status input lines */ 329 ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status", 330 GPIOD_IN); 331 if (IS_ERR(ddata->status_gpios)) 332 return PTR_ERR(ddata->status_gpios); 333 334 if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES) 335 return -EINVAL; 336 337 /* MDM6600 cmd output lines */ 338 ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd", 339 GPIOD_OUT_LOW); 340 if (IS_ERR(ddata->cmd_gpios)) 341 return PTR_ERR(ddata->cmd_gpios); 342 343 if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES) 344 return -EINVAL; 345 346 return 0; 347 } 348 349 /** 350 * phy_mdm6600_device_power_on() - power on mdm6600 device 351 * @ddata: device driver data 352 * 353 * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure 354 * the shared USB bootmode GPIOs are configured, then request modem start-up, 355 * reset and power-up.. And then we need to recycle the shared USB bootmode 356 * GPIOs as they are also used for Out of Band (OOB) wake for the USB and 357 * TS 27.010 serial mux. 358 */ 359 static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata) 360 { 361 struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio; 362 int error = 0, wakeirq; 363 364 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 365 mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; 366 reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 367 power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER]; 368 369 /* 370 * Shared GPIOs must be low for normal USB mode. After booting 371 * they are used for OOB wake signaling. These can be also used 372 * to configure USB flashing mode later on based on a module 373 * parameter. 374 */ 375 gpiod_set_value_cansleep(mode_gpio0, 0); 376 gpiod_set_value_cansleep(mode_gpio1, 0); 377 378 /* Request start-up mode */ 379 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS); 380 381 /* Request a reset first */ 382 gpiod_set_value_cansleep(reset_gpio, 0); 383 msleep(100); 384 385 /* Toggle power GPIO to request mdm6600 to start */ 386 gpiod_set_value_cansleep(power_gpio, 1); 387 msleep(100); 388 gpiod_set_value_cansleep(power_gpio, 0); 389 390 /* 391 * Looks like the USB PHY needs between 2.2 to 4 seconds. 392 * If we try to use it before that, we will get L3 errors 393 * from omap-usb-host trying to access the PHY. See also 394 * phy_mdm6600_init() for -EPROBE_DEFER. 395 */ 396 msleep(PHY_MDM6600_PHY_DELAY_MS); 397 ddata->enabled = true; 398 399 /* Booting up the rest of MDM6600 will take total about 8 seconds */ 400 dev_info(ddata->dev, "Waiting for power up request to complete..\n"); 401 if (wait_for_completion_timeout(&ddata->ack, 402 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) { 403 if (ddata->status > PHY_MDM6600_STATUS_PANIC && 404 ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK) 405 dev_info(ddata->dev, "Powered up OK\n"); 406 } else { 407 ddata->enabled = false; 408 error = -ETIMEDOUT; 409 dev_err(ddata->dev, "Timed out powering up\n"); 410 } 411 412 /* Reconfigure mode1 GPIO as input for OOB wake */ 413 gpiod_direction_input(mode_gpio1); 414 415 wakeirq = gpiod_to_irq(mode_gpio1); 416 if (wakeirq <= 0) 417 return wakeirq; 418 419 error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL, 420 phy_mdm6600_wakeirq_thread, 421 IRQF_TRIGGER_RISING | 422 IRQF_TRIGGER_FALLING | 423 IRQF_ONESHOT, 424 "mdm6600-wake", 425 ddata); 426 if (error) 427 dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n", 428 wakeirq, error); 429 430 ddata->running = true; 431 432 return error; 433 } 434 435 /** 436 * phy_mdm6600_device_power_off() - power off mdm6600 device 437 * @ddata: device driver data 438 */ 439 static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) 440 { 441 struct gpio_desc *reset_gpio = 442 ddata->ctrl_gpios[PHY_MDM6600_RESET]; 443 444 ddata->enabled = false; 445 phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ); 446 msleep(100); 447 448 gpiod_set_value_cansleep(reset_gpio, 1); 449 450 dev_info(ddata->dev, "Waiting for power down request to complete.. "); 451 if (wait_for_completion_timeout(&ddata->ack, 452 msecs_to_jiffies(5000))) { 453 if (ddata->status == PHY_MDM6600_STATUS_PANIC) 454 dev_info(ddata->dev, "Powered down OK\n"); 455 } else { 456 dev_err(ddata->dev, "Timed out powering down\n"); 457 } 458 } 459 460 static void phy_mdm6600_deferred_power_on(struct work_struct *work) 461 { 462 struct phy_mdm6600 *ddata; 463 int error; 464 465 ddata = container_of(work, struct phy_mdm6600, bootup_work.work); 466 467 error = phy_mdm6600_device_power_on(ddata); 468 if (error) 469 dev_err(ddata->dev, "Device not functional\n"); 470 } 471 472 /* 473 * USB suspend puts mdm6600 into low power mode. For any n_gsm using apps, 474 * we need to keep the modem awake by kicking it's mode0 GPIO. This will 475 * keep the modem awake for about 1.2 seconds. When no n_gsm apps are using 476 * the modem, runtime PM auto mode can be enabled so modem can enter low 477 * power mode. 478 */ 479 static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata) 480 { 481 struct gpio_desc *mode_gpio0; 482 483 mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; 484 gpiod_set_value_cansleep(mode_gpio0, 1); 485 usleep_range(5, 15); 486 gpiod_set_value_cansleep(mode_gpio0, 0); 487 if (ddata->awake) 488 usleep_range(5, 15); 489 else 490 msleep(MDM6600_MODEM_WAKE_DELAY_MS); 491 } 492 493 static void phy_mdm6600_modem_wake(struct work_struct *work) 494 { 495 struct phy_mdm6600 *ddata; 496 497 ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work); 498 phy_mdm6600_wake_modem(ddata); 499 schedule_delayed_work(&ddata->modem_wake_work, 500 msecs_to_jiffies(MDM6600_MODEM_IDLE_DELAY_MS)); 501 } 502 503 static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev) 504 { 505 struct phy_mdm6600 *ddata = dev_get_drvdata(dev); 506 507 cancel_delayed_work_sync(&ddata->modem_wake_work); 508 ddata->awake = false; 509 510 return 0; 511 } 512 513 static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev) 514 { 515 struct phy_mdm6600 *ddata = dev_get_drvdata(dev); 516 517 phy_mdm6600_modem_wake(&ddata->modem_wake_work.work); 518 ddata->awake = true; 519 520 return 0; 521 } 522 523 static const struct dev_pm_ops phy_mdm6600_pm_ops = { 524 SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend, 525 phy_mdm6600_runtime_resume, NULL) 526 }; 527 528 static const struct of_device_id phy_mdm6600_id_table[] = { 529 { .compatible = "motorola,mapphone-mdm6600", }, 530 {}, 531 }; 532 MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table); 533 534 static int phy_mdm6600_probe(struct platform_device *pdev) 535 { 536 struct phy_mdm6600 *ddata; 537 int error; 538 539 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); 540 if (!ddata) 541 return -ENOMEM; 542 543 INIT_DELAYED_WORK(&ddata->bootup_work, 544 phy_mdm6600_deferred_power_on); 545 INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status); 546 INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake); 547 init_completion(&ddata->ack); 548 549 ddata->dev = &pdev->dev; 550 platform_set_drvdata(pdev, ddata); 551 552 /* Active state selected in phy_mdm6600_power_on() */ 553 error = pinctrl_pm_select_sleep_state(ddata->dev); 554 if (error) 555 dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", 556 __func__, error); 557 558 error = phy_mdm6600_init_lines(ddata); 559 if (error) 560 return error; 561 562 phy_mdm6600_init_irq(ddata); 563 schedule_delayed_work(&ddata->bootup_work, 0); 564 565 /* 566 * See phy_mdm6600_device_power_on(). We should be able 567 * to remove this eventually when ohci-platform can deal 568 * with -EPROBE_DEFER. 569 */ 570 msleep(PHY_MDM6600_PHY_DELAY_MS + 500); 571 572 /* 573 * Enable PM runtime only after PHY has been powered up properly. 574 * It is currently only needed after USB suspends mdm6600 and n_gsm 575 * needs to access the device. We don't want to do this earlier as 576 * gpio mode0 pin doubles as mdm6600 wake-up gpio. 577 */ 578 pm_runtime_use_autosuspend(ddata->dev); 579 pm_runtime_set_autosuspend_delay(ddata->dev, 580 MDM6600_MODEM_IDLE_DELAY_MS); 581 pm_runtime_enable(ddata->dev); 582 error = pm_runtime_get_sync(ddata->dev); 583 if (error < 0) { 584 dev_warn(ddata->dev, "failed to wake modem: %i\n", error); 585 pm_runtime_put_noidle(ddata->dev); 586 goto cleanup; 587 } 588 589 ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops); 590 if (IS_ERR(ddata->generic_phy)) { 591 error = PTR_ERR(ddata->generic_phy); 592 goto idle; 593 } 594 595 phy_set_drvdata(ddata->generic_phy, ddata); 596 597 ddata->phy_provider = 598 devm_of_phy_provider_register(ddata->dev, 599 of_phy_simple_xlate); 600 if (IS_ERR(ddata->phy_provider)) 601 error = PTR_ERR(ddata->phy_provider); 602 603 idle: 604 pm_runtime_mark_last_busy(ddata->dev); 605 pm_runtime_put_autosuspend(ddata->dev); 606 607 cleanup: 608 if (error < 0) 609 phy_mdm6600_device_power_off(ddata); 610 611 return error; 612 } 613 614 static int phy_mdm6600_remove(struct platform_device *pdev) 615 { 616 struct phy_mdm6600 *ddata = platform_get_drvdata(pdev); 617 struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; 618 619 pm_runtime_dont_use_autosuspend(ddata->dev); 620 pm_runtime_put_sync(ddata->dev); 621 pm_runtime_disable(ddata->dev); 622 623 if (!ddata->running) 624 wait_for_completion_timeout(&ddata->ack, 625 msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS)); 626 627 gpiod_set_value_cansleep(reset_gpio, 1); 628 phy_mdm6600_device_power_off(ddata); 629 630 cancel_delayed_work_sync(&ddata->modem_wake_work); 631 cancel_delayed_work_sync(&ddata->bootup_work); 632 cancel_delayed_work_sync(&ddata->status_work); 633 634 return 0; 635 } 636 637 static struct platform_driver phy_mdm6600_driver = { 638 .probe = phy_mdm6600_probe, 639 .remove = phy_mdm6600_remove, 640 .driver = { 641 .name = "phy-mapphone-mdm6600", 642 .pm = &phy_mdm6600_pm_ops, 643 .of_match_table = of_match_ptr(phy_mdm6600_id_table), 644 }, 645 }; 646 647 module_platform_driver(phy_mdm6600_driver); 648 649 MODULE_ALIAS("platform:gpio_usb"); 650 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); 651 MODULE_DESCRIPTION("mdm6600 gpio usb phy driver"); 652 MODULE_LICENSE("GPL v2"); 653