drivers/usb/chipidea/ci_hdrc_imx.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2012 Freescale Semiconductor, Inc.
   4  * Copyright (C) 2012 Marek Vasut <[email protected]>
   5  * on behalf of DENX Software Engineering GmbH
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pm_runtime.h>
  12 #include <linux/usb/chipidea.h>
  13 #include <linux/usb/of.h>
  14 #include <linux/clk.h>
  15 #include <linux/pinctrl/consumer.h>
  16 #include <linux/pm_qos.h>
  17
  18 #include "ci.h"
  19 #include "ci_hdrc_imx.h"
  20
  21 struct ci_hdrc_imx_platform_flag {
  22         unsigned int flags;
  23 };
  24
  25 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
  26         .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
  27                 CI_HDRC_DISABLE_STREAMING,
  28 };
  29
  30 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
  31         .flags = CI_HDRC_DISABLE_STREAMING,
  32 };
  33
  34 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
  35         .flags = CI_HDRC_IMX28_WRITE_FIX |
  36                 CI_HDRC_TURN_VBUS_EARLY_ON |
  37                 CI_HDRC_DISABLE_STREAMING,
  38 };
  39
  40 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
  41         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  42                 CI_HDRC_TURN_VBUS_EARLY_ON |
  43                 CI_HDRC_DISABLE_STREAMING,
  44 };
  45
  46 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
  47         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  48                 CI_HDRC_TURN_VBUS_EARLY_ON |
  49                 CI_HDRC_DISABLE_HOST_STREAMING,
  50 };
  51
  52 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
  53         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  54                 CI_HDRC_TURN_VBUS_EARLY_ON |
  55                 CI_HDRC_DISABLE_HOST_STREAMING,
  56 };
  57
  58 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
  59         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  60                 CI_HDRC_TURN_VBUS_EARLY_ON |
  61                 CI_HDRC_DISABLE_DEVICE_STREAMING,
  62 };
  63
  64 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
  65         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
  66 };
  67
  68 static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
  69         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  70                 CI_HDRC_PMQOS,
  71 };
  72
  73 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
  74         { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
  75         { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
  76         { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
  77         { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
  78         { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
  79         { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
  80         { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
  81         { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
  82         { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
  83         { /* sentinel */ }
  84 };
  85 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
  86
  87 struct ci_hdrc_imx_data {
  88         struct usb_phy *phy;
  89         struct platform_device *ci_pdev;
  90         struct clk *clk;
  91         struct imx_usbmisc_data *usbmisc_data;
  92         bool supports_runtime_pm;
  93         bool override_phy_control;
  94         bool in_lpm;
  95         struct pinctrl *pinctrl;
  96         struct pinctrl_state *pinctrl_hsic_active;
  97         struct regulator *hsic_pad_regulator;
  98         /* SoC before i.mx6 (except imx23/imx28) needs three clks */
  99         bool need_three_clks;
 100         struct clk *clk_ipg;
 101         struct clk *clk_ahb;
 102         struct clk *clk_per;
 103         /* --------------------------------- */
 104         struct pm_qos_request pm_qos_req;
 105         const struct ci_hdrc_imx_platform_flag *plat_data;
 106 };
 107
 108 /* Common functions shared by usbmisc drivers */
 109
 110 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 111 {
 112         struct platform_device *misc_pdev;
 113         struct device_node *np = dev->of_node;
 114         struct of_phandle_args args;
 115         struct imx_usbmisc_data *data;
 116         int ret;
 117
 118         /*
 119          * In case the fsl,usbmisc property is not present this device doesn't
 120          * need usbmisc. Return NULL (which is no error here)
 121          */
 122         if (!of_get_property(np, "fsl,usbmisc", NULL))
 123                 return NULL;
 124
 125         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 126         if (!data)
 127                 return ERR_PTR(-ENOMEM);
 128
 129         ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
 130                                         0, &args);
 131         if (ret) {
 132                 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
 133                         ret);
 134                 return ERR_PTR(ret);
 135         }
 136
 137         data->index = args.args[0];
 138
 139         misc_pdev = of_find_device_by_node(args.np);
 140         of_node_put(args.np);
 141
 142         if (!misc_pdev)
 143                 return ERR_PTR(-EPROBE_DEFER);
 144
 145         if (!platform_get_drvdata(misc_pdev)) {
 146                 put_device(&misc_pdev->dev);
 147                 return ERR_PTR(-EPROBE_DEFER);
 148         }
 149         data->dev = &misc_pdev->dev;
 150
 151         /*
 152          * Check the various over current related properties. If over current
 153          * detection is disabled we're not interested in the polarity.
 154          */
 155         if (of_find_property(np, "disable-over-current", NULL)) {
 156                 data->disable_oc = 1;
 157         } else if (of_find_property(np, "over-current-active-high", NULL)) {
 158                 data->oc_pol_active_low = 0;
 159                 data->oc_pol_configured = 1;
 160         } else if (of_find_property(np, "over-current-active-low", NULL)) {
 161                 data->oc_pol_active_low = 1;
 162                 data->oc_pol_configured = 1;
 163         } else {
 164                 dev_warn(dev, "No over current polarity defined\n");
 165         }
 166
 167         data->pwr_pol = of_property_read_bool(np, "power-active-high");
 168         data->evdo = of_property_read_bool(np, "external-vbus-divider");
 169
 170         if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
 171                 data->ulpi = 1;
 172
 173         of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control",
 174                         &data->emp_curr_control);
 175         of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
 176                         &data->dc_vol_level_adjust);
 177
 178         return data;
 179 }
 180
 181 /* End of common functions shared by usbmisc drivers*/
 182 static int imx_get_clks(struct device *dev)
 183 {
 184         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 185         int ret = 0;
 186
 187         data->clk_ipg = devm_clk_get(dev, "ipg");
 188         if (IS_ERR(data->clk_ipg)) {
 189                 /* If the platform only needs one clocks */
 190                 data->clk = devm_clk_get(dev, NULL);
 191                 if (IS_ERR(data->clk)) {
 192                         ret = PTR_ERR(data->clk);
 193                         dev_err(dev,
 194                                 "Failed to get clks, err=%ld,%ld\n",
 195                                 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
 196                         return ret;
 197                 }
 198                 return ret;
 199         }
 200
 201         data->clk_ahb = devm_clk_get(dev, "ahb");
 202         if (IS_ERR(data->clk_ahb)) {
 203                 ret = PTR_ERR(data->clk_ahb);
 204                 dev_err(dev,
 205                         "Failed to get ahb clock, err=%d\n", ret);
 206                 return ret;
 207         }
 208
 209         data->clk_per = devm_clk_get(dev, "per");
 210         if (IS_ERR(data->clk_per)) {
 211                 ret = PTR_ERR(data->clk_per);
 212                 dev_err(dev,
 213                         "Failed to get per clock, err=%d\n", ret);
 214                 return ret;
 215         }
 216
 217         data->need_three_clks = true;
 218         return ret;
 219 }
 220
 221 static int imx_prepare_enable_clks(struct device *dev)
 222 {
 223         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 224         int ret = 0;
 225
 226         if (data->need_three_clks) {
 227                 ret = clk_prepare_enable(data->clk_ipg);
 228                 if (ret) {
 229                         dev_err(dev,
 230                                 "Failed to prepare/enable ipg clk, err=%d\n",
 231                                 ret);
 232                         return ret;
 233                 }
 234
 235                 ret = clk_prepare_enable(data->clk_ahb);
 236                 if (ret) {
 237                         dev_err(dev,
 238                                 "Failed to prepare/enable ahb clk, err=%d\n",
 239                                 ret);
 240                         clk_disable_unprepare(data->clk_ipg);
 241                         return ret;
 242                 }
 243
 244                 ret = clk_prepare_enable(data->clk_per);
 245                 if (ret) {
 246                         dev_err(dev,
 247                                 "Failed to prepare/enable per clk, err=%d\n",
 248                                 ret);
 249                         clk_disable_unprepare(data->clk_ahb);
 250                         clk_disable_unprepare(data->clk_ipg);
 251                         return ret;
 252                 }
 253         } else {
 254                 ret = clk_prepare_enable(data->clk);
 255                 if (ret) {
 256                         dev_err(dev,
 257                                 "Failed to prepare/enable clk, err=%d\n",
 258                                 ret);
 259                         return ret;
 260                 }
 261         }
 262
 263         return ret;
 264 }
 265
 266 static void imx_disable_unprepare_clks(struct device *dev)
 267 {
 268         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 269
 270         if (data->need_three_clks) {
 271                 clk_disable_unprepare(data->clk_per);
 272                 clk_disable_unprepare(data->clk_ahb);
 273                 clk_disable_unprepare(data->clk_ipg);
 274         } else {
 275                 clk_disable_unprepare(data->clk);
 276         }
 277 }
 278
 279 static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
 280 {
 281         struct device *dev = ci->dev->parent;
 282         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 283         int ret = 0;
 284         struct imx_usbmisc_data *mdata = data->usbmisc_data;
 285
 286         switch (event) {
 287         case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
 288                 if (data->pinctrl) {
 289                         ret = pinctrl_select_state(data->pinctrl,
 290                                         data->pinctrl_hsic_active);
 291                         if (ret)
 292                                 dev_err(dev,
 293                                         "hsic_active select failed, err=%d\n",
 294                                         ret);
 295                 }
 296                 break;
 297         case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
 298                 ret = imx_usbmisc_hsic_set_connect(mdata);
 299                 if (ret)
 300                         dev_err(dev,
 301                                 "hsic_set_connect failed, err=%d\n", ret);
 302                 break;
 303         case CI_HDRC_CONTROLLER_VBUS_EVENT:
 304                 if (ci->vbus_active)
 305                         ret = imx_usbmisc_charger_detection(mdata, true);
 306                 else
 307                         ret = imx_usbmisc_charger_detection(mdata, false);
 308                 if (ci->usb_phy)
 309                         schedule_work(&ci->usb_phy->chg_work);
 310                 break;
 311         default:
 312                 break;
 313         }
 314
 315         return ret;
 316 }
 317
 318 static int ci_hdrc_imx_probe(struct platform_device *pdev)
 319 {
 320         struct ci_hdrc_imx_data *data;
 321         struct ci_hdrc_platform_data pdata = {
 322                 .name           = dev_name(&pdev->dev),
 323                 .capoffset      = DEF_CAPOFFSET,
 324                 .notify_event   = ci_hdrc_imx_notify_event,
 325         };
 326         int ret;
 327         const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
 328         struct device_node *np = pdev->dev.of_node;
 329         struct device *dev = &pdev->dev;
 330
 331         imx_platform_flag = of_device_get_match_data(&pdev->dev);
 332
 333         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 334         if (!data)
 335                 return -ENOMEM;
 336
 337         data->plat_data = imx_platform_flag;
 338         pdata.flags |= imx_platform_flag->flags;
 339         platform_set_drvdata(pdev, data);
 340         data->usbmisc_data = usbmisc_get_init_data(dev);
 341         if (IS_ERR(data->usbmisc_data))
 342                 return PTR_ERR(data->usbmisc_data);
 343
 344         if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
 345                 && data->usbmisc_data) {
 346                 pdata.flags |= CI_HDRC_IMX_IS_HSIC;
 347                 data->usbmisc_data->hsic = 1;
 348                 data->pinctrl = devm_pinctrl_get(dev);
 349                 if (PTR_ERR(data->pinctrl) == -ENODEV)
 350                         data->pinctrl = NULL;
 351                 else if (IS_ERR(data->pinctrl))
 352                         return dev_err_probe(dev, PTR_ERR(data->pinctrl),
 353                                              "pinctrl get failed\n");
 354
 355                 data->hsic_pad_regulator =
 356                                 devm_regulator_get_optional(dev, "hsic");
 357                 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
 358                         /* no pad regualator is needed */
 359                         data->hsic_pad_regulator = NULL;
 360                 } else if (IS_ERR(data->hsic_pad_regulator))
 361                         return dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
 362                                              "Get HSIC pad regulator error\n");
 363
 364                 if (data->hsic_pad_regulator) {
 365                         ret = regulator_enable(data->hsic_pad_regulator);
 366                         if (ret) {
 367                                 dev_err(dev,
 368                                         "Failed to enable HSIC pad regulator\n");
 369                                 return ret;
 370                         }
 371                 }
 372         }
 373
 374         /* HSIC pinctrl handling */
 375         if (data->pinctrl) {
 376                 struct pinctrl_state *pinctrl_hsic_idle;
 377
 378                 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
 379                 if (IS_ERR(pinctrl_hsic_idle)) {
 380                         dev_err(dev,
 381                                 "pinctrl_hsic_idle lookup failed, err=%ld\n",
 382                                         PTR_ERR(pinctrl_hsic_idle));
 383                         return PTR_ERR(pinctrl_hsic_idle);
 384                 }
 385
 386                 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
 387                 if (ret) {
 388                         dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
 389                         return ret;
 390                 }
 391
 392                 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
 393                                                                 "active");
 394                 if (IS_ERR(data->pinctrl_hsic_active)) {
 395                         dev_err(dev,
 396                                 "pinctrl_hsic_active lookup failed, err=%ld\n",
 397                                         PTR_ERR(data->pinctrl_hsic_active));
 398                         return PTR_ERR(data->pinctrl_hsic_active);
 399                 }
 400         }
 401
 402         if (pdata.flags & CI_HDRC_PMQOS)
 403                 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
 404
 405         ret = imx_get_clks(dev);
 406         if (ret)
 407                 goto disable_hsic_regulator;
 408
 409         ret = imx_prepare_enable_clks(dev);
 410         if (ret)
 411                 goto disable_hsic_regulator;
 412
 413         data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 414         if (IS_ERR(data->phy)) {
 415                 ret = PTR_ERR(data->phy);
 416                 if (ret != -ENODEV)
 417                         goto err_clk;
 418                 data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
 419                 if (IS_ERR(data->phy)) {
 420                         ret = PTR_ERR(data->phy);
 421                         if (ret == -ENODEV)
 422                                 data->phy = NULL;
 423                         else
 424                                 goto err_clk;
 425                 }
 426         }
 427
 428         pdata.usb_phy = data->phy;
 429         if (data->usbmisc_data)
 430                 data->usbmisc_data->usb_phy = data->phy;
 431
 432         if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
 433              of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
 434             of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
 435                 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
 436                 data->override_phy_control = true;
 437                 usb_phy_init(pdata.usb_phy);
 438         }
 439
 440         if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
 441                 data->supports_runtime_pm = true;
 442
 443         ret = imx_usbmisc_init(data->usbmisc_data);
 444         if (ret) {
 445                 dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
 446                 goto err_clk;
 447         }
 448
 449         data->ci_pdev = ci_hdrc_add_device(dev,
 450                                 pdev->resource, pdev->num_resources,
 451                                 &pdata);
 452         if (IS_ERR(data->ci_pdev)) {
 453                 ret = PTR_ERR(data->ci_pdev);
 454                 dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
 455                 goto err_clk;
 456         }
 457
 458         if (data->usbmisc_data) {
 459                 if (!IS_ERR(pdata.id_extcon.edev) ||
 460                     of_property_read_bool(np, "usb-role-switch"))
 461                         data->usbmisc_data->ext_id = 1;
 462
 463                 if (!IS_ERR(pdata.vbus_extcon.edev) ||
 464                     of_property_read_bool(np, "usb-role-switch"))
 465                         data->usbmisc_data->ext_vbus = 1;
 466
 467                 /* usbmisc needs to know dr mode to choose wakeup setting */
 468                 data->usbmisc_data->available_role =
 469                         ci_hdrc_query_available_role(data->ci_pdev);
 470         }
 471
 472         ret = imx_usbmisc_init_post(data->usbmisc_data);
 473         if (ret) {
 474                 dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
 475                 goto disable_device;
 476         }
 477
 478         if (data->supports_runtime_pm) {
 479                 pm_runtime_set_active(dev);
 480                 pm_runtime_enable(dev);
 481         }
 482
 483         device_set_wakeup_capable(dev, true);
 484
 485         return 0;
 486
 487 disable_device:
 488         ci_hdrc_remove_device(data->ci_pdev);
 489 err_clk:
 490         imx_disable_unprepare_clks(dev);
 491 disable_hsic_regulator:
 492         if (data->hsic_pad_regulator)
 493                 /* don't overwrite original ret (cf. EPROBE_DEFER) */
 494                 regulator_disable(data->hsic_pad_regulator);
 495         if (pdata.flags & CI_HDRC_PMQOS)
 496                 cpu_latency_qos_remove_request(&data->pm_qos_req);
 497         data->ci_pdev = NULL;
 498         return ret;
 499 }
 500
 501 static int ci_hdrc_imx_remove(struct platform_device *pdev)
 502 {
 503         struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
 504
 505         if (data->supports_runtime_pm) {
 506                 pm_runtime_get_sync(&pdev->dev);
 507                 pm_runtime_disable(&pdev->dev);
 508                 pm_runtime_put_noidle(&pdev->dev);
 509         }
 510         if (data->ci_pdev)
 511                 ci_hdrc_remove_device(data->ci_pdev);
 512         if (data->override_phy_control)
 513                 usb_phy_shutdown(data->phy);
 514         if (data->ci_pdev) {
 515                 imx_disable_unprepare_clks(&pdev->dev);
 516                 if (data->plat_data->flags & CI_HDRC_PMQOS)
 517                         cpu_latency_qos_remove_request(&data->pm_qos_req);
 518                 if (data->hsic_pad_regulator)
 519                         regulator_disable(data->hsic_pad_regulator);
 520         }
 521
 522         return 0;
 523 }
 524
 525 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
 526 {
 527         ci_hdrc_imx_remove(pdev);
 528 }
 529
 530 static int __maybe_unused imx_controller_suspend(struct device *dev)
 531 {
 532         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 533         int ret = 0;
 534
 535         dev_dbg(dev, "at %s\n", __func__);
 536
 537         ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, false);
 538         if (ret) {
 539                 dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
 540                 return ret;
 541         }
 542
 543         imx_disable_unprepare_clks(dev);
 544         if (data->plat_data->flags & CI_HDRC_PMQOS)
 545                 cpu_latency_qos_remove_request(&data->pm_qos_req);
 546
 547         data->in_lpm = true;
 548
 549         return 0;
 550 }
 551
 552 static int __maybe_unused imx_controller_resume(struct device *dev)
 553 {
 554         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 555         int ret = 0;
 556
 557         dev_dbg(dev, "at %s\n", __func__);
 558
 559         if (!data->in_lpm) {
 560                 WARN_ON(1);
 561                 return 0;
 562         }
 563
 564         if (data->plat_data->flags & CI_HDRC_PMQOS)
 565                 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
 566
 567         ret = imx_prepare_enable_clks(dev);
 568         if (ret)
 569                 return ret;
 570
 571         data->in_lpm = false;
 572
 573         ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
 574         if (ret) {
 575                 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 576                 goto clk_disable;
 577         }
 578
 579         ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, true);
 580         if (ret) {
 581                 dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
 582                 goto hsic_set_clk_fail;
 583         }
 584
 585         return 0;
 586
 587 hsic_set_clk_fail:
 588         imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 589 clk_disable:
 590         imx_disable_unprepare_clks(dev);
 591         return ret;
 592 }
 593
 594 static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev)
 595 {
 596         int ret;
 597
 598         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 599
 600         if (data->in_lpm)
 601                 /* The core's suspend doesn't run */
 602                 return 0;
 603
 604         if (device_may_wakeup(dev)) {
 605                 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 606                 if (ret) {
 607                         dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
 608                                         ret);
 609                         return ret;
 610                 }
 611         }
 612
 613         ret = imx_controller_suspend(dev);
 614         if (ret)
 615                 return ret;
 616
 617         pinctrl_pm_select_sleep_state(dev);
 618         return ret;
 619 }
 620
 621 static int __maybe_unused ci_hdrc_imx_resume(struct device *dev)
 622 {
 623         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 624         int ret;
 625
 626         pinctrl_pm_select_default_state(dev);
 627         ret = imx_controller_resume(dev);
 628         if (!ret && data->supports_runtime_pm) {
 629                 pm_runtime_disable(dev);
 630                 pm_runtime_set_active(dev);
 631                 pm_runtime_enable(dev);
 632         }
 633
 634         return ret;
 635 }
 636
 637 static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev)
 638 {
 639         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 640         int ret;
 641
 642         if (data->in_lpm) {
 643                 WARN_ON(1);
 644                 return 0;
 645         }
 646
 647         ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 648         if (ret) {
 649                 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 650                 return ret;
 651         }
 652
 653         return imx_controller_suspend(dev);
 654 }
 655
 656 static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev)
 657 {
 658         return imx_controller_resume(dev);
 659 }
 660
 661 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 662         SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 663         SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
 664                         ci_hdrc_imx_runtime_resume, NULL)
 665 };
 666 static struct platform_driver ci_hdrc_imx_driver = {
 667         .probe = ci_hdrc_imx_probe,
 668         .remove = ci_hdrc_imx_remove,
 669         .shutdown = ci_hdrc_imx_shutdown,
 670         .driver = {
 671                 .name = "imx_usb",
 672                 .of_match_table = ci_hdrc_imx_dt_ids,
 673                 .pm = &ci_hdrc_imx_pm_ops,
 674          },
 675 };
 676
 677 module_platform_driver(ci_hdrc_imx_driver);
 678
 679 MODULE_ALIAS("platform:imx-usb");
 680 MODULE_LICENSE("GPL");
 681 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
 682 MODULE_AUTHOR("Marek Vasut <[email protected]>");
 683 MODULE_AUTHOR("Richard Zhao <[email protected]>");