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