1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2012 Freescale Semiconductor, Inc. 4 * Copyright (C) 2012 Marek Vasut <marex@denx.de> 5 * on behalf of DENX Software Engineering GmbH 6 */ 7 8 #include <linux/module.h> 9 #include <linux/of.h> 10 #include <linux/of_platform.h> 11 #include <linux/platform_device.h> 12 #include <linux/pm_runtime.h> 13 #include <linux/usb/chipidea.h> 14 #include <linux/usb/of.h> 15 #include <linux/clk.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_qos.h> 18 19 #include "ci.h" 20 #include "ci_hdrc_imx.h" 21 22 struct ci_hdrc_imx_platform_flag { 23 unsigned int flags; 24 }; 25 26 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = { 27 .flags = CI_HDRC_TURN_VBUS_EARLY_ON | 28 CI_HDRC_DISABLE_STREAMING, 29 }; 30 31 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = { 32 .flags = CI_HDRC_DISABLE_STREAMING, 33 }; 34 35 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = { 36 .flags = CI_HDRC_IMX28_WRITE_FIX | 37 CI_HDRC_TURN_VBUS_EARLY_ON | 38 CI_HDRC_DISABLE_STREAMING, 39 }; 40 41 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = { 42 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | 43 CI_HDRC_TURN_VBUS_EARLY_ON | 44 CI_HDRC_DISABLE_STREAMING, 45 }; 46 47 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = { 48 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | 49 CI_HDRC_TURN_VBUS_EARLY_ON | 50 CI_HDRC_DISABLE_HOST_STREAMING, 51 }; 52 53 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = { 54 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | 55 CI_HDRC_TURN_VBUS_EARLY_ON | 56 CI_HDRC_DISABLE_HOST_STREAMING, 57 }; 58 59 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = { 60 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | 61 CI_HDRC_TURN_VBUS_EARLY_ON | 62 CI_HDRC_DISABLE_DEVICE_STREAMING, 63 }; 64 65 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = { 66 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM, 67 }; 68 69 static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = { 70 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | 71 CI_HDRC_HAS_PORTSC_PEC_MISSED | 72 CI_HDRC_PMQOS, 73 }; 74 75 static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = { 76 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | 77 CI_HDRC_HAS_PORTSC_PEC_MISSED, 78 }; 79 80 static const struct of_device_id ci_hdrc_imx_dt_ids[] = { 81 { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data}, 82 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data}, 83 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data}, 84 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data}, 85 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data}, 86 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data}, 87 { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data}, 88 { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data}, 89 { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data}, 90 { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data}, 91 { /* sentinel */ } 92 }; 93 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids); 94 95 struct ci_hdrc_imx_data { 96 struct usb_phy *phy; 97 struct platform_device *ci_pdev; 98 struct clk *clk; 99 struct clk *clk_wakeup; 100 struct imx_usbmisc_data *usbmisc_data; 101 bool supports_runtime_pm; 102 bool override_phy_control; 103 bool in_lpm; 104 struct pinctrl *pinctrl; 105 struct pinctrl_state *pinctrl_hsic_active; 106 struct regulator *hsic_pad_regulator; 107 /* SoC before i.mx6 (except imx23/imx28) needs three clks */ 108 bool need_three_clks; 109 struct clk *clk_ipg; 110 struct clk *clk_ahb; 111 struct clk *clk_per; 112 /* --------------------------------- */ 113 struct pm_qos_request pm_qos_req; 114 const struct ci_hdrc_imx_platform_flag *plat_data; 115 }; 116 117 /* Common functions shared by usbmisc drivers */ 118 119 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev) 120 { 121 struct platform_device *misc_pdev; 122 struct device_node *np = dev->of_node; 123 struct of_phandle_args args; 124 struct imx_usbmisc_data *data; 125 int ret; 126 127 /* 128 * In case the fsl,usbmisc property is not present this device doesn't 129 * need usbmisc. Return NULL (which is no error here) 130 */ 131 if (!of_get_property(np, "fsl,usbmisc", NULL)) 132 return NULL; 133 134 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 135 if (!data) 136 return ERR_PTR(-ENOMEM); 137 138 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", 139 0, &args); 140 if (ret) { 141 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", 142 ret); 143 return ERR_PTR(ret); 144 } 145 146 data->index = args.args[0]; 147 148 misc_pdev = of_find_device_by_node(args.np); 149 of_node_put(args.np); 150 151 if (!misc_pdev) 152 return ERR_PTR(-EPROBE_DEFER); 153 154 if (!platform_get_drvdata(misc_pdev)) { 155 put_device(&misc_pdev->dev); 156 return ERR_PTR(-EPROBE_DEFER); 157 } 158 data->dev = &misc_pdev->dev; 159 160 /* 161 * Check the various over current related properties. If over current 162 * detection is disabled we're not interested in the polarity. 163 */ 164 if (of_property_read_bool(np, "disable-over-current")) { 165 data->disable_oc = 1; 166 } else if (of_property_read_bool(np, "over-current-active-high")) { 167 data->oc_pol_active_low = 0; 168 data->oc_pol_configured = 1; 169 } else if (of_property_read_bool(np, "over-current-active-low")) { 170 data->oc_pol_active_low = 1; 171 data->oc_pol_configured = 1; 172 } else { 173 dev_warn(dev, "No over current polarity defined\n"); 174 } 175 176 data->pwr_pol = of_property_read_bool(np, "power-active-high"); 177 data->evdo = of_property_read_bool(np, "external-vbus-divider"); 178 179 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) 180 data->ulpi = 1; 181 182 if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control", 183 &data->emp_curr_control)) 184 data->emp_curr_control = -1; 185 if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust", 186 &data->dc_vol_level_adjust)) 187 data->dc_vol_level_adjust = -1; 188 if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust", 189 &data->rise_fall_time_adjust)) 190 data->rise_fall_time_adjust = -1; 191 192 return data; 193 } 194 195 /* End of common functions shared by usbmisc drivers*/ 196 static int imx_get_clks(struct device *dev) 197 { 198 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 199 int ret = 0; 200 201 data->clk_ipg = devm_clk_get(dev, "ipg"); 202 if (IS_ERR(data->clk_ipg)) { 203 /* If the platform only needs one primary clock */ 204 data->clk = devm_clk_get(dev, NULL); 205 if (IS_ERR(data->clk)) { 206 ret = PTR_ERR(data->clk); 207 dev_err(dev, 208 "Failed to get clks, err=%ld,%ld\n", 209 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg)); 210 return ret; 211 } 212 /* Get wakeup clock. Not all of the platforms need to 213 * handle this clock. So make it optional. 214 */ 215 data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup_clk"); 216 if (IS_ERR(data->clk_wakeup)) 217 ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup), 218 "Failed to get wakeup clk\n"); 219 return ret; 220 } 221 222 data->clk_ahb = devm_clk_get(dev, "ahb"); 223 if (IS_ERR(data->clk_ahb)) { 224 ret = PTR_ERR(data->clk_ahb); 225 dev_err(dev, 226 "Failed to get ahb clock, err=%d\n", ret); 227 return ret; 228 } 229 230 data->clk_per = devm_clk_get(dev, "per"); 231 if (IS_ERR(data->clk_per)) { 232 ret = PTR_ERR(data->clk_per); 233 dev_err(dev, 234 "Failed to get per clock, err=%d\n", ret); 235 return ret; 236 } 237 238 data->need_three_clks = true; 239 return ret; 240 } 241 242 static int imx_prepare_enable_clks(struct device *dev) 243 { 244 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 245 int ret = 0; 246 247 if (data->need_three_clks) { 248 ret = clk_prepare_enable(data->clk_ipg); 249 if (ret) { 250 dev_err(dev, 251 "Failed to prepare/enable ipg clk, err=%d\n", 252 ret); 253 return ret; 254 } 255 256 ret = clk_prepare_enable(data->clk_ahb); 257 if (ret) { 258 dev_err(dev, 259 "Failed to prepare/enable ahb clk, err=%d\n", 260 ret); 261 clk_disable_unprepare(data->clk_ipg); 262 return ret; 263 } 264 265 ret = clk_prepare_enable(data->clk_per); 266 if (ret) { 267 dev_err(dev, 268 "Failed to prepare/enable per clk, err=%d\n", 269 ret); 270 clk_disable_unprepare(data->clk_ahb); 271 clk_disable_unprepare(data->clk_ipg); 272 return ret; 273 } 274 } else { 275 ret = clk_prepare_enable(data->clk); 276 if (ret) { 277 dev_err(dev, 278 "Failed to prepare/enable clk, err=%d\n", 279 ret); 280 return ret; 281 } 282 } 283 284 return ret; 285 } 286 287 static void imx_disable_unprepare_clks(struct device *dev) 288 { 289 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 290 291 if (data->need_three_clks) { 292 clk_disable_unprepare(data->clk_per); 293 clk_disable_unprepare(data->clk_ahb); 294 clk_disable_unprepare(data->clk_ipg); 295 } else { 296 clk_disable_unprepare(data->clk); 297 } 298 } 299 300 static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event) 301 { 302 struct device *dev = ci->dev->parent; 303 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 304 int ret = 0; 305 struct imx_usbmisc_data *mdata = data->usbmisc_data; 306 307 switch (event) { 308 case CI_HDRC_IMX_HSIC_ACTIVE_EVENT: 309 if (data->pinctrl) { 310 ret = pinctrl_select_state(data->pinctrl, 311 data->pinctrl_hsic_active); 312 if (ret) 313 dev_err(dev, 314 "hsic_active select failed, err=%d\n", 315 ret); 316 } 317 break; 318 case CI_HDRC_IMX_HSIC_SUSPEND_EVENT: 319 ret = imx_usbmisc_hsic_set_connect(mdata); 320 if (ret) 321 dev_err(dev, 322 "hsic_set_connect failed, err=%d\n", ret); 323 break; 324 case CI_HDRC_CONTROLLER_VBUS_EVENT: 325 if (ci->vbus_active) 326 ret = imx_usbmisc_charger_detection(mdata, true); 327 else 328 ret = imx_usbmisc_charger_detection(mdata, false); 329 if (ci->usb_phy) 330 schedule_work(&ci->usb_phy->chg_work); 331 break; 332 default: 333 break; 334 } 335 336 return ret; 337 } 338 339 static int ci_hdrc_imx_probe(struct platform_device *pdev) 340 { 341 struct ci_hdrc_imx_data *data; 342 struct ci_hdrc_platform_data pdata = { 343 .name = dev_name(&pdev->dev), 344 .capoffset = DEF_CAPOFFSET, 345 .notify_event = ci_hdrc_imx_notify_event, 346 }; 347 int ret; 348 const struct ci_hdrc_imx_platform_flag *imx_platform_flag; 349 struct device_node *np = pdev->dev.of_node; 350 struct device *dev = &pdev->dev; 351 352 imx_platform_flag = of_device_get_match_data(&pdev->dev); 353 354 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 355 if (!data) 356 return -ENOMEM; 357 358 data->plat_data = imx_platform_flag; 359 pdata.flags |= imx_platform_flag->flags; 360 platform_set_drvdata(pdev, data); 361 data->usbmisc_data = usbmisc_get_init_data(dev); 362 if (IS_ERR(data->usbmisc_data)) 363 return PTR_ERR(data->usbmisc_data); 364 365 if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC) 366 && data->usbmisc_data) { 367 pdata.flags |= CI_HDRC_IMX_IS_HSIC; 368 data->usbmisc_data->hsic = 1; 369 data->pinctrl = devm_pinctrl_get(dev); 370 if (PTR_ERR(data->pinctrl) == -ENODEV) 371 data->pinctrl = NULL; 372 else if (IS_ERR(data->pinctrl)) 373 return dev_err_probe(dev, PTR_ERR(data->pinctrl), 374 "pinctrl get failed\n"); 375 376 data->hsic_pad_regulator = 377 devm_regulator_get_optional(dev, "hsic"); 378 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) { 379 /* no pad regulator is needed */ 380 data->hsic_pad_regulator = NULL; 381 } else if (IS_ERR(data->hsic_pad_regulator)) 382 return dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator), 383 "Get HSIC pad regulator error\n"); 384 385 if (data->hsic_pad_regulator) { 386 ret = regulator_enable(data->hsic_pad_regulator); 387 if (ret) { 388 dev_err(dev, 389 "Failed to enable HSIC pad regulator\n"); 390 return ret; 391 } 392 } 393 } 394 395 /* HSIC pinctrl handling */ 396 if (data->pinctrl) { 397 struct pinctrl_state *pinctrl_hsic_idle; 398 399 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle"); 400 if (IS_ERR(pinctrl_hsic_idle)) { 401 dev_err(dev, 402 "pinctrl_hsic_idle lookup failed, err=%ld\n", 403 PTR_ERR(pinctrl_hsic_idle)); 404 return PTR_ERR(pinctrl_hsic_idle); 405 } 406 407 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle); 408 if (ret) { 409 dev_err(dev, "hsic_idle select failed, err=%d\n", ret); 410 return ret; 411 } 412 413 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl, 414 "active"); 415 if (IS_ERR(data->pinctrl_hsic_active)) { 416 dev_err(dev, 417 "pinctrl_hsic_active lookup failed, err=%ld\n", 418 PTR_ERR(data->pinctrl_hsic_active)); 419 return PTR_ERR(data->pinctrl_hsic_active); 420 } 421 } 422 423 if (pdata.flags & CI_HDRC_PMQOS) 424 cpu_latency_qos_add_request(&data->pm_qos_req, 0); 425 426 ret = imx_get_clks(dev); 427 if (ret) 428 goto disable_hsic_regulator; 429 430 ret = imx_prepare_enable_clks(dev); 431 if (ret) 432 goto disable_hsic_regulator; 433 434 ret = clk_prepare_enable(data->clk_wakeup); 435 if (ret) 436 goto err_wakeup_clk; 437 438 data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0); 439 if (IS_ERR(data->phy)) { 440 ret = PTR_ERR(data->phy); 441 if (ret != -ENODEV) { 442 dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n"); 443 goto err_clk; 444 } 445 data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0); 446 if (IS_ERR(data->phy)) { 447 ret = PTR_ERR(data->phy); 448 if (ret == -ENODEV) { 449 data->phy = NULL; 450 } else { 451 dev_err_probe(dev, ret, "Failed to parse phys\n"); 452 goto err_clk; 453 } 454 } 455 } 456 457 pdata.usb_phy = data->phy; 458 if (data->usbmisc_data) 459 data->usbmisc_data->usb_phy = data->phy; 460 461 if ((of_device_is_compatible(np, "fsl,imx53-usb") || 462 of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy && 463 of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) { 464 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL; 465 data->override_phy_control = true; 466 usb_phy_init(pdata.usb_phy); 467 } 468 469 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM) 470 data->supports_runtime_pm = true; 471 472 ret = imx_usbmisc_init(data->usbmisc_data); 473 if (ret) { 474 dev_err(dev, "usbmisc init failed, ret=%d\n", ret); 475 goto err_clk; 476 } 477 478 data->ci_pdev = ci_hdrc_add_device(dev, 479 pdev->resource, pdev->num_resources, 480 &pdata); 481 if (IS_ERR(data->ci_pdev)) { 482 ret = PTR_ERR(data->ci_pdev); 483 dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n"); 484 goto err_clk; 485 } 486 487 if (data->usbmisc_data) { 488 if (!IS_ERR(pdata.id_extcon.edev) || 489 of_property_read_bool(np, "usb-role-switch")) 490 data->usbmisc_data->ext_id = 1; 491 492 if (!IS_ERR(pdata.vbus_extcon.edev) || 493 of_property_read_bool(np, "usb-role-switch")) 494 data->usbmisc_data->ext_vbus = 1; 495 496 /* usbmisc needs to know dr mode to choose wakeup setting */ 497 data->usbmisc_data->available_role = 498 ci_hdrc_query_available_role(data->ci_pdev); 499 } 500 501 ret = imx_usbmisc_init_post(data->usbmisc_data); 502 if (ret) { 503 dev_err(dev, "usbmisc post failed, ret=%d\n", ret); 504 goto disable_device; 505 } 506 507 if (data->supports_runtime_pm) { 508 pm_runtime_set_active(dev); 509 pm_runtime_enable(dev); 510 } 511 512 device_set_wakeup_capable(dev, true); 513 514 return 0; 515 516 disable_device: 517 ci_hdrc_remove_device(data->ci_pdev); 518 err_clk: 519 clk_disable_unprepare(data->clk_wakeup); 520 err_wakeup_clk: 521 imx_disable_unprepare_clks(dev); 522 disable_hsic_regulator: 523 if (data->hsic_pad_regulator) 524 /* don't overwrite original ret (cf. EPROBE_DEFER) */ 525 regulator_disable(data->hsic_pad_regulator); 526 if (pdata.flags & CI_HDRC_PMQOS) 527 cpu_latency_qos_remove_request(&data->pm_qos_req); 528 data->ci_pdev = NULL; 529 return ret; 530 } 531 532 static void ci_hdrc_imx_remove(struct platform_device *pdev) 533 { 534 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); 535 536 if (data->supports_runtime_pm) { 537 pm_runtime_get_sync(&pdev->dev); 538 pm_runtime_disable(&pdev->dev); 539 pm_runtime_put_noidle(&pdev->dev); 540 } 541 if (data->ci_pdev) 542 ci_hdrc_remove_device(data->ci_pdev); 543 if (data->override_phy_control) 544 usb_phy_shutdown(data->phy); 545 if (data->ci_pdev) { 546 imx_disable_unprepare_clks(&pdev->dev); 547 clk_disable_unprepare(data->clk_wakeup); 548 if (data->plat_data->flags & CI_HDRC_PMQOS) 549 cpu_latency_qos_remove_request(&data->pm_qos_req); 550 if (data->hsic_pad_regulator) 551 regulator_disable(data->hsic_pad_regulator); 552 } 553 } 554 555 static void ci_hdrc_imx_shutdown(struct platform_device *pdev) 556 { 557 ci_hdrc_imx_remove(pdev); 558 } 559 560 static int __maybe_unused imx_controller_suspend(struct device *dev, 561 pm_message_t msg) 562 { 563 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 564 int ret = 0; 565 566 dev_dbg(dev, "at %s\n", __func__); 567 568 ret = imx_usbmisc_suspend(data->usbmisc_data, 569 PMSG_IS_AUTO(msg) || device_may_wakeup(dev)); 570 if (ret) { 571 dev_err(dev, 572 "usbmisc suspend failed, ret=%d\n", ret); 573 return ret; 574 } 575 576 imx_disable_unprepare_clks(dev); 577 if (data->plat_data->flags & CI_HDRC_PMQOS) 578 cpu_latency_qos_remove_request(&data->pm_qos_req); 579 580 data->in_lpm = true; 581 582 return 0; 583 } 584 585 static int __maybe_unused imx_controller_resume(struct device *dev, 586 pm_message_t msg) 587 { 588 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 589 int ret = 0; 590 591 dev_dbg(dev, "at %s\n", __func__); 592 593 if (!data->in_lpm) { 594 WARN_ON(1); 595 return 0; 596 } 597 598 if (data->plat_data->flags & CI_HDRC_PMQOS) 599 cpu_latency_qos_add_request(&data->pm_qos_req, 0); 600 601 ret = imx_prepare_enable_clks(dev); 602 if (ret) 603 return ret; 604 605 data->in_lpm = false; 606 607 ret = imx_usbmisc_resume(data->usbmisc_data, 608 PMSG_IS_AUTO(msg) || device_may_wakeup(dev)); 609 if (ret) { 610 dev_err(dev, "usbmisc resume failed, ret=%d\n", ret); 611 goto clk_disable; 612 } 613 614 return 0; 615 616 clk_disable: 617 imx_disable_unprepare_clks(dev); 618 return ret; 619 } 620 621 static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev) 622 { 623 int ret; 624 625 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 626 627 if (data->in_lpm) 628 /* The core's suspend doesn't run */ 629 return 0; 630 631 ret = imx_controller_suspend(dev, PMSG_SUSPEND); 632 if (ret) 633 return ret; 634 635 pinctrl_pm_select_sleep_state(dev); 636 return ret; 637 } 638 639 static int __maybe_unused ci_hdrc_imx_resume(struct device *dev) 640 { 641 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 642 int ret; 643 644 pinctrl_pm_select_default_state(dev); 645 ret = imx_controller_resume(dev, PMSG_RESUME); 646 if (!ret && data->supports_runtime_pm) { 647 pm_runtime_disable(dev); 648 pm_runtime_set_active(dev); 649 pm_runtime_enable(dev); 650 } 651 652 return ret; 653 } 654 655 static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev) 656 { 657 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); 658 659 if (data->in_lpm) { 660 WARN_ON(1); 661 return 0; 662 } 663 664 return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND); 665 } 666 667 static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev) 668 { 669 return imx_controller_resume(dev, PMSG_AUTO_RESUME); 670 } 671 672 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = { 673 SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume) 674 SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend, 675 ci_hdrc_imx_runtime_resume, NULL) 676 }; 677 static struct platform_driver ci_hdrc_imx_driver = { 678 .probe = ci_hdrc_imx_probe, 679 .remove_new = ci_hdrc_imx_remove, 680 .shutdown = ci_hdrc_imx_shutdown, 681 .driver = { 682 .name = "imx_usb", 683 .of_match_table = ci_hdrc_imx_dt_ids, 684 .pm = &ci_hdrc_imx_pm_ops, 685 }, 686 }; 687 688 module_platform_driver(ci_hdrc_imx_driver); 689 690 MODULE_ALIAS("platform:imx-usb"); 691 MODULE_LICENSE("GPL"); 692 MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); 693 MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); 694 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); 695