drivers/staging/greybus/arche-platform.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Arche Platform driver to enable Unipro link.
   4  *
   5  * Copyright 2014-2015 Google Inc.
   6  * Copyright 2014-2015 Linaro Ltd.
   7  */
   8
   9 #include <linux/clk.h>
  10 #include <linux/delay.h>
  11 #include <linux/gpio/consumer.h>
  12 #include <linux/init.h>
  13 #include <linux/module.h>
  14 #include <linux/of_platform.h>
  15 #include <linux/pinctrl/consumer.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/irq.h>
  20 #include <linux/suspend.h>
  21 #include <linux/time.h>
  22 #include <linux/greybus.h>
  23 #include "arche_platform.h"
  24
  25 #if IS_ENABLED(CONFIG_USB_HSIC_USB3613)
  26 #include <linux/usb/usb3613.h>
  27 #else
  28 static inline int usb3613_hub_mode_ctrl(bool unused)
  29 {
  30         return 0;
  31 }
  32 #endif
  33
  34 #define WD_COLDBOOT_PULSE_WIDTH_MS      30
  35
  36 enum svc_wakedetect_state {
  37         WD_STATE_IDLE,                  /* Default state = pulled high/low */
  38         WD_STATE_BOOT_INIT,             /* WD = falling edge (low) */
  39         WD_STATE_COLDBOOT_TRIG,         /* WD = rising edge (high), > 30msec */
  40         WD_STATE_STANDBYBOOT_TRIG,      /* As of now not used ?? */
  41         WD_STATE_COLDBOOT_START,        /* Cold boot process started */
  42         WD_STATE_STANDBYBOOT_START,     /* Not used */
  43 };
  44
  45 struct arche_platform_drvdata {
  46         /* Control GPIO signals to and from AP <=> SVC */
  47         struct gpio_desc *svc_reset;
  48         bool is_reset_act_hi;
  49         struct gpio_desc *svc_sysboot;
  50         struct gpio_desc *wake_detect; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */
  51
  52         enum arche_platform_state state;
  53
  54         struct gpio_desc *svc_refclk_req;
  55         struct clk *svc_ref_clk;
  56
  57         struct pinctrl *pinctrl;
  58         struct pinctrl_state *pin_default;
  59
  60         int num_apbs;
  61
  62         enum svc_wakedetect_state wake_detect_state;
  63         int wake_detect_irq;
  64         spinlock_t wake_lock;                   /* Protect wake_detect_state */
  65         struct mutex platform_state_mutex;      /* Protect state */
  66         unsigned long wake_detect_start;
  67         struct notifier_block pm_notifier;
  68
  69         struct device *dev;
  70 };
  71
  72 /* Requires calling context to hold arche_pdata->platform_state_mutex */
  73 static void arche_platform_set_state(struct arche_platform_drvdata *arche_pdata,
  74                                      enum arche_platform_state state)
  75 {
  76         arche_pdata->state = state;
  77 }
  78
  79 /* Requires arche_pdata->wake_lock is held by calling context */
  80 static void arche_platform_set_wake_detect_state(struct arche_platform_drvdata *arche_pdata,
  81                                                  enum svc_wakedetect_state state)
  82 {
  83         arche_pdata->wake_detect_state = state;
  84 }
  85
  86 static inline void svc_reset_onoff(struct gpio_desc *gpio, bool onoff)
  87 {
  88         gpiod_set_raw_value(gpio, onoff);
  89 }
  90
  91 static int apb_cold_boot(struct device *dev, void *data)
  92 {
  93         int ret;
  94
  95         ret = apb_ctrl_coldboot(dev);
  96         if (ret)
  97                 dev_warn(dev, "failed to coldboot\n");
  98
  99         /*Child nodes are independent, so do not exit coldboot operation */
 100         return 0;
 101 }
 102
 103 static int apb_poweroff(struct device *dev, void *data)
 104 {
 105         apb_ctrl_poweroff(dev);
 106
 107         /* Enable HUB3613 into HUB mode. */
 108         if (usb3613_hub_mode_ctrl(false))
 109                 dev_warn(dev, "failed to control hub device\n");
 110
 111         return 0;
 112 }
 113
 114 static void arche_platform_wd_irq_en(struct arche_platform_drvdata *arche_pdata)
 115 {
 116         /* Enable interrupt here, to read event back from SVC */
 117         enable_irq(arche_pdata->wake_detect_irq);
 118 }
 119
 120 static irqreturn_t arche_platform_wd_irq_thread(int irq, void *devid)
 121 {
 122         struct arche_platform_drvdata *arche_pdata = devid;
 123         unsigned long flags;
 124
 125         spin_lock_irqsave(&arche_pdata->wake_lock, flags);
 126         if (arche_pdata->wake_detect_state != WD_STATE_COLDBOOT_TRIG) {
 127                 /* Something is wrong */
 128                 spin_unlock_irqrestore(&arche_pdata->wake_lock, flags);
 129                 return IRQ_HANDLED;
 130         }
 131
 132         arche_platform_set_wake_detect_state(arche_pdata,
 133                                              WD_STATE_COLDBOOT_START);
 134         spin_unlock_irqrestore(&arche_pdata->wake_lock, flags);
 135
 136         /* It should complete power cycle, so first make sure it is poweroff */
 137         device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
 138
 139         /* Bring APB out of reset: cold boot sequence */
 140         device_for_each_child(arche_pdata->dev, NULL, apb_cold_boot);
 141
 142         /* Enable HUB3613 into HUB mode. */
 143         if (usb3613_hub_mode_ctrl(true))
 144                 dev_warn(arche_pdata->dev, "failed to control hub device\n");
 145
 146         spin_lock_irqsave(&arche_pdata->wake_lock, flags);
 147         arche_platform_set_wake_detect_state(arche_pdata, WD_STATE_IDLE);
 148         spin_unlock_irqrestore(&arche_pdata->wake_lock, flags);
 149
 150         return IRQ_HANDLED;
 151 }
 152
 153 static irqreturn_t arche_platform_wd_irq(int irq, void *devid)
 154 {
 155         struct arche_platform_drvdata *arche_pdata = devid;
 156         unsigned long flags;
 157
 158         spin_lock_irqsave(&arche_pdata->wake_lock, flags);
 159
 160         if (gpiod_get_value(arche_pdata->wake_detect)) {
 161                 /* wake/detect rising */
 162
 163                 /*
 164                  * If wake/detect line goes high after low, within less than
 165                  * 30msec, then standby boot sequence is initiated, which is not
 166                  * supported/implemented as of now. So ignore it.
 167                  */
 168                 if (arche_pdata->wake_detect_state == WD_STATE_BOOT_INIT) {
 169                         if (time_before(jiffies,
 170                                         arche_pdata->wake_detect_start +
 171                                         msecs_to_jiffies(WD_COLDBOOT_PULSE_WIDTH_MS))) {
 172                                 arche_platform_set_wake_detect_state(arche_pdata,
 173                                                                      WD_STATE_IDLE);
 174                         } else {
 175                                 /*
 176                                  * Check we are not in middle of irq thread
 177                                  * already
 178                                  */
 179                                 if (arche_pdata->wake_detect_state !=
 180                                                 WD_STATE_COLDBOOT_START) {
 181                                         arche_platform_set_wake_detect_state(arche_pdata,
 182                                                                              WD_STATE_COLDBOOT_TRIG);
 183                                         spin_unlock_irqrestore(&arche_pdata->wake_lock,
 184                                                                flags);
 185                                         return IRQ_WAKE_THREAD;
 186                                 }
 187                         }
 188                 }
 189         } else {
 190                 /* wake/detect falling */
 191                 if (arche_pdata->wake_detect_state == WD_STATE_IDLE) {
 192                         arche_pdata->wake_detect_start = jiffies;
 193                         /*
 194                          * In the beginning, when wake/detect goes low
 195                          * (first time), we assume it is meant for coldboot
 196                          * and set the flag. If wake/detect line stays low
 197                          * beyond 30msec, then it is coldboot else fallback
 198                          * to standby boot.
 199                          */
 200                         arche_platform_set_wake_detect_state(arche_pdata,
 201                                                              WD_STATE_BOOT_INIT);
 202                 }
 203         }
 204
 205         spin_unlock_irqrestore(&arche_pdata->wake_lock, flags);
 206
 207         return IRQ_HANDLED;
 208 }
 209
 210 /*
 211  * Requires arche_pdata->platform_state_mutex to be held
 212  */
 213 static int
 214 arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata)
 215 {
 216         int ret;
 217
 218         if (arche_pdata->state == ARCHE_PLATFORM_STATE_ACTIVE)
 219                 return 0;
 220
 221         dev_info(arche_pdata->dev, "Booting from cold boot state\n");
 222
 223         svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
 224
 225         gpiod_set_value(arche_pdata->svc_sysboot, 0);
 226         usleep_range(100, 200);
 227
 228         ret = clk_prepare_enable(arche_pdata->svc_ref_clk);
 229         if (ret) {
 230                 dev_err(arche_pdata->dev, "failed to enable svc_ref_clk: %d\n",
 231                         ret);
 232                 return ret;
 233         }
 234
 235         /* bring SVC out of reset */
 236         svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi);
 237
 238         arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_ACTIVE);
 239
 240         return 0;
 241 }
 242
 243 /*
 244  * Requires arche_pdata->platform_state_mutex to be held
 245  */
 246 static int
 247 arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata)
 248 {
 249         int ret;
 250
 251         if (arche_pdata->state == ARCHE_PLATFORM_STATE_FW_FLASHING)
 252                 return 0;
 253
 254         dev_info(arche_pdata->dev, "Switching to FW flashing state\n");
 255
 256         svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
 257
 258         gpiod_set_value(arche_pdata->svc_sysboot, 1);
 259
 260         usleep_range(100, 200);
 261
 262         ret = clk_prepare_enable(arche_pdata->svc_ref_clk);
 263         if (ret) {
 264                 dev_err(arche_pdata->dev, "failed to enable svc_ref_clk: %d\n",
 265                         ret);
 266                 return ret;
 267         }
 268
 269         svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi);
 270
 271         arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_FW_FLASHING);
 272
 273         return 0;
 274 }
 275
 276 /*
 277  * Requires arche_pdata->platform_state_mutex to be held
 278  */
 279 static void
 280 arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pdata)
 281 {
 282         unsigned long flags;
 283
 284         if (arche_pdata->state == ARCHE_PLATFORM_STATE_OFF)
 285                 return;
 286
 287         /* If in fw_flashing mode, then no need to repeate things again */
 288         if (arche_pdata->state != ARCHE_PLATFORM_STATE_FW_FLASHING) {
 289                 disable_irq(arche_pdata->wake_detect_irq);
 290
 291                 spin_lock_irqsave(&arche_pdata->wake_lock, flags);
 292                 arche_platform_set_wake_detect_state(arche_pdata,
 293                                                      WD_STATE_IDLE);
 294                 spin_unlock_irqrestore(&arche_pdata->wake_lock, flags);
 295         }
 296
 297         clk_disable_unprepare(arche_pdata->svc_ref_clk);
 298
 299         /* As part of exit, put APB back in reset state */
 300         svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
 301
 302         arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF);
 303 }
 304
 305 static ssize_t state_store(struct device *dev,
 306                            struct device_attribute *attr,
 307                            const char *buf, size_t count)
 308 {
 309         struct arche_platform_drvdata *arche_pdata = dev_get_drvdata(dev);
 310         int ret = 0;
 311
 312         mutex_lock(&arche_pdata->platform_state_mutex);
 313
 314         if (sysfs_streq(buf, "off")) {
 315                 if (arche_pdata->state == ARCHE_PLATFORM_STATE_OFF)
 316                         goto exit;
 317
 318                 /*  If SVC goes down, bring down APB's as well */
 319                 device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
 320
 321                 arche_platform_poweroff_seq(arche_pdata);
 322
 323         } else if (sysfs_streq(buf, "active")) {
 324                 if (arche_pdata->state == ARCHE_PLATFORM_STATE_ACTIVE)
 325                         goto exit;
 326
 327                 /* First we want to make sure we power off everything
 328                  * and then activate back again
 329                  */
 330                 device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
 331                 arche_platform_poweroff_seq(arche_pdata);
 332
 333                 arche_platform_wd_irq_en(arche_pdata);
 334                 ret = arche_platform_coldboot_seq(arche_pdata);
 335                 if (ret)
 336                         goto exit;
 337
 338         } else if (sysfs_streq(buf, "standby")) {
 339                 if (arche_pdata->state == ARCHE_PLATFORM_STATE_STANDBY)
 340                         goto exit;
 341
 342                 dev_warn(arche_pdata->dev, "standby state not supported\n");
 343         } else if (sysfs_streq(buf, "fw_flashing")) {
 344                 if (arche_pdata->state == ARCHE_PLATFORM_STATE_FW_FLASHING)
 345                         goto exit;
 346
 347                 /*
 348                  * Here we only control SVC.
 349                  *
 350                  * In case of FW_FLASHING mode we do not want to control
 351                  * APBs, as in case of V2, SPI bus is shared between both
 352                  * the APBs. So let user chose which APB he wants to flash.
 353                  */
 354                 arche_platform_poweroff_seq(arche_pdata);
 355
 356                 ret = arche_platform_fw_flashing_seq(arche_pdata);
 357                 if (ret)
 358                         goto exit;
 359         } else {
 360                 dev_err(arche_pdata->dev, "unknown state\n");
 361                 ret = -EINVAL;
 362         }
 363
 364 exit:
 365         mutex_unlock(&arche_pdata->platform_state_mutex);
 366         return ret ? ret : count;
 367 }
 368
 369 static ssize_t state_show(struct device *dev,
 370                           struct device_attribute *attr, char *buf)
 371 {
 372         struct arche_platform_drvdata *arche_pdata = dev_get_drvdata(dev);
 373
 374         switch (arche_pdata->state) {
 375         case ARCHE_PLATFORM_STATE_OFF:
 376                 return sprintf(buf, "off\n");
 377         case ARCHE_PLATFORM_STATE_ACTIVE:
 378                 return sprintf(buf, "active\n");
 379         case ARCHE_PLATFORM_STATE_STANDBY:
 380                 return sprintf(buf, "standby\n");
 381         case ARCHE_PLATFORM_STATE_FW_FLASHING:
 382                 return sprintf(buf, "fw_flashing\n");
 383         default:
 384                 return sprintf(buf, "unknown state\n");
 385         }
 386 }
 387
 388 static DEVICE_ATTR_RW(state);
 389
 390 static int arche_platform_pm_notifier(struct notifier_block *notifier,
 391                                       unsigned long pm_event, void *unused)
 392 {
 393         struct arche_platform_drvdata *arche_pdata =
 394                 container_of(notifier, struct arche_platform_drvdata,
 395                              pm_notifier);
 396         int ret = NOTIFY_DONE;
 397
 398         mutex_lock(&arche_pdata->platform_state_mutex);
 399         switch (pm_event) {
 400         case PM_SUSPEND_PREPARE:
 401                 if (arche_pdata->state != ARCHE_PLATFORM_STATE_ACTIVE) {
 402                         ret = NOTIFY_STOP;
 403                         break;
 404                 }
 405                 device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
 406                 arche_platform_poweroff_seq(arche_pdata);
 407                 break;
 408         case PM_POST_SUSPEND:
 409                 if (arche_pdata->state != ARCHE_PLATFORM_STATE_OFF)
 410                         break;
 411
 412                 arche_platform_wd_irq_en(arche_pdata);
 413                 arche_platform_coldboot_seq(arche_pdata);
 414                 break;
 415         default:
 416                 break;
 417         }
 418         mutex_unlock(&arche_pdata->platform_state_mutex);
 419
 420         return ret;
 421 }
 422
 423 static int arche_platform_probe(struct platform_device *pdev)
 424 {
 425         struct arche_platform_drvdata *arche_pdata;
 426         struct device *dev = &pdev->dev;
 427         struct device_node *np = dev->of_node;
 428         int ret;
 429         unsigned int flags;
 430
 431         arche_pdata = devm_kzalloc(&pdev->dev, sizeof(*arche_pdata),
 432                                    GFP_KERNEL);
 433         if (!arche_pdata)
 434                 return -ENOMEM;
 435
 436         /* setup svc reset gpio */
 437         arche_pdata->is_reset_act_hi = of_property_read_bool(np,
 438                                                              "svc,reset-active-high");
 439         if (arche_pdata->is_reset_act_hi)
 440                 flags = GPIOD_OUT_HIGH;
 441         else
 442                 flags = GPIOD_OUT_LOW;
 443
 444         arche_pdata->svc_reset = devm_gpiod_get(dev, "svc,reset", flags);
 445         if (IS_ERR(arche_pdata->svc_reset)) {
 446                 ret = PTR_ERR(arche_pdata->svc_reset);
 447                 dev_err(dev, "failed to request svc-reset GPIO: %d\n", ret);
 448                 return ret;
 449         }
 450         arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF);
 451
 452         arche_pdata->svc_sysboot = devm_gpiod_get(dev, "svc,sysboot",
 453                                                   GPIOD_OUT_LOW);
 454         if (IS_ERR(arche_pdata->svc_sysboot)) {
 455                 ret = PTR_ERR(arche_pdata->svc_sysboot);
 456                 dev_err(dev, "failed to request sysboot0 GPIO: %d\n", ret);
 457                 return ret;
 458         }
 459
 460         /* setup the clock request gpio first */
 461         arche_pdata->svc_refclk_req = devm_gpiod_get(dev, "svc,refclk-req",
 462                                                      GPIOD_IN);
 463         if (IS_ERR(arche_pdata->svc_refclk_req)) {
 464                 ret = PTR_ERR(arche_pdata->svc_refclk_req);
 465                 dev_err(dev, "failed to request svc-clk-req GPIO: %d\n", ret);
 466                 return ret;
 467         }
 468
 469         /* setup refclk2 to follow the pin */
 470         arche_pdata->svc_ref_clk = devm_clk_get(dev, "svc_ref_clk");
 471         if (IS_ERR(arche_pdata->svc_ref_clk)) {
 472                 ret = PTR_ERR(arche_pdata->svc_ref_clk);
 473                 dev_err(dev, "failed to get svc_ref_clk: %d\n", ret);
 474                 return ret;
 475         }
 476
 477         platform_set_drvdata(pdev, arche_pdata);
 478
 479         arche_pdata->num_apbs = of_get_child_count(np);
 480         dev_dbg(dev, "Number of APB's available - %d\n", arche_pdata->num_apbs);
 481
 482         arche_pdata->wake_detect = devm_gpiod_get(dev, "svc,wake-detect",
 483                                                   GPIOD_IN);
 484         if (IS_ERR(arche_pdata->wake_detect)) {
 485                 ret = PTR_ERR(arche_pdata->wake_detect);
 486                 dev_err(dev, "Failed requesting wake_detect GPIO: %d\n", ret);
 487                 return ret;
 488         }
 489
 490         arche_platform_set_wake_detect_state(arche_pdata, WD_STATE_IDLE);
 491
 492         arche_pdata->dev = &pdev->dev;
 493
 494         spin_lock_init(&arche_pdata->wake_lock);
 495         mutex_init(&arche_pdata->platform_state_mutex);
 496         arche_pdata->wake_detect_irq =
 497                 gpiod_to_irq(arche_pdata->wake_detect);
 498
 499         ret = devm_request_threaded_irq(dev, arche_pdata->wake_detect_irq,
 500                                         arche_platform_wd_irq,
 501                                         arche_platform_wd_irq_thread,
 502                                         IRQF_TRIGGER_FALLING |
 503                                         IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 504                                         dev_name(dev), arche_pdata);
 505         if (ret) {
 506                 dev_err(dev, "failed to request wake detect IRQ %d\n", ret);
 507                 return ret;
 508         }
 509         disable_irq(arche_pdata->wake_detect_irq);
 510
 511         ret = device_create_file(dev, &dev_attr_state);
 512         if (ret) {
 513                 dev_err(dev, "failed to create state file in sysfs\n");
 514                 return ret;
 515         }
 516
 517         ret = of_platform_populate(np, NULL, NULL, dev);
 518         if (ret) {
 519                 dev_err(dev, "failed to populate child nodes %d\n", ret);
 520                 goto err_device_remove;
 521         }
 522
 523         arche_pdata->pm_notifier.notifier_call = arche_platform_pm_notifier;
 524         ret = register_pm_notifier(&arche_pdata->pm_notifier);
 525
 526         if (ret) {
 527                 dev_err(dev, "failed to register pm notifier %d\n", ret);
 528                 goto err_device_remove;
 529         }
 530
 531         /* Explicitly power off if requested */
 532         if (!of_property_read_bool(pdev->dev.of_node, "arche,init-off")) {
 533                 mutex_lock(&arche_pdata->platform_state_mutex);
 534                 ret = arche_platform_coldboot_seq(arche_pdata);
 535                 if (ret) {
 536                         dev_err(dev, "Failed to cold boot svc %d\n", ret);
 537                         goto err_coldboot;
 538                 }
 539                 arche_platform_wd_irq_en(arche_pdata);
 540                 mutex_unlock(&arche_pdata->platform_state_mutex);
 541         }
 542
 543         dev_info(dev, "Device registered successfully\n");
 544         return 0;
 545
 546 err_coldboot:
 547         mutex_unlock(&arche_pdata->platform_state_mutex);
 548 err_device_remove:
 549         device_remove_file(&pdev->dev, &dev_attr_state);
 550         return ret;
 551 }
 552
 553 static int arche_remove_child(struct device *dev, void *unused)
 554 {
 555         struct platform_device *pdev = to_platform_device(dev);
 556
 557         platform_device_unregister(pdev);
 558
 559         return 0;
 560 }
 561
 562 static int arche_platform_remove(struct platform_device *pdev)
 563 {
 564         struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
 565
 566         unregister_pm_notifier(&arche_pdata->pm_notifier);
 567         device_remove_file(&pdev->dev, &dev_attr_state);
 568         device_for_each_child(&pdev->dev, NULL, arche_remove_child);
 569         arche_platform_poweroff_seq(arche_pdata);
 570
 571         if (usb3613_hub_mode_ctrl(false))
 572                 dev_warn(arche_pdata->dev, "failed to control hub device\n");
 573                 /* TODO: Should we do anything more here ?? */
 574         return 0;
 575 }
 576
 577 static __maybe_unused int arche_platform_suspend(struct device *dev)
 578 {
 579         /*
 580          * If timing profile premits, we may shutdown bridge
 581          * completely
 582          *
 583          * TODO: sequence ??
 584          *
 585          * Also, need to make sure we meet precondition for unipro suspend
 586          * Precondition: Definition ???
 587          */
 588         return 0;
 589 }
 590
 591 static __maybe_unused int arche_platform_resume(struct device *dev)
 592 {
 593         /*
 594          * At least for ES2 we have to meet the delay requirement between
 595          * unipro switch and AP bridge init, depending on whether bridge is in
 596          * OFF state or standby state.
 597          *
 598          * Based on whether bridge is in standby or OFF state we may have to
 599          * assert multiple signals. Please refer to WDM spec, for more info.
 600          *
 601          */
 602         return 0;
 603 }
 604
 605 static void arche_platform_shutdown(struct platform_device *pdev)
 606 {
 607         struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
 608
 609         arche_platform_poweroff_seq(arche_pdata);
 610
 611         usb3613_hub_mode_ctrl(false);
 612 }
 613
 614 static SIMPLE_DEV_PM_OPS(arche_platform_pm_ops,
 615                         arche_platform_suspend,
 616                         arche_platform_resume);
 617
 618 static const struct of_device_id arche_platform_of_match[] = {
 619         /* Use PID/VID of SVC device */
 620         { .compatible = "google,arche-platform", },
 621         { },
 622 };
 623
 624 static const struct of_device_id arche_combined_id[] = {
 625         /* Use PID/VID of SVC device */
 626         { .compatible = "google,arche-platform", },
 627         { .compatible = "usbffff,2", },
 628         { },
 629 };
 630 MODULE_DEVICE_TABLE(of, arche_combined_id);
 631
 632 static struct platform_driver arche_platform_device_driver = {
 633         .probe          = arche_platform_probe,
 634         .remove         = arche_platform_remove,
 635         .shutdown       = arche_platform_shutdown,
 636         .driver         = {
 637                 .name   = "arche-platform-ctrl",
 638                 .pm     = &arche_platform_pm_ops,
 639                 .of_match_table = arche_platform_of_match,
 640         }
 641 };
 642
 643 static int __init arche_init(void)
 644 {
 645         int retval;
 646
 647         retval = platform_driver_register(&arche_platform_device_driver);
 648         if (retval)
 649                 return retval;
 650
 651         retval = arche_apb_init();
 652         if (retval)
 653                 platform_driver_unregister(&arche_platform_device_driver);
 654
 655         return retval;
 656 }
 657 module_init(arche_init);
 658
 659 static void __exit arche_exit(void)
 660 {
 661         arche_apb_exit();
 662         platform_driver_unregister(&arche_platform_device_driver);
 663 }
 664 module_exit(arche_exit);
 665
 666 MODULE_LICENSE("GPL v2");
 667 MODULE_AUTHOR("Vaibhav Hiremath <vaibhav.hiremath@linaro.org>");
 668 MODULE_DESCRIPTION("Arche Platform Driver");