target/linux/ipq806x/patches-3.18/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch

   1 --- a/drivers/phy/Kconfig
   2 +++ b/drivers/phy/Kconfig
   3 @@ -256,4 +256,15 @@ config PHY_STIH41X_USB
   4           Enable this to support the USB transceiver that is part of
   5           STMicroelectronics STiH41x SoC series.
   6
   7 +config PHY_QCOM_DWC3
   8 +       tristate "QCOM DWC3 USB PHY support"
   9 +       depends on ARCH_QCOM
  10 +       depends on HAS_IOMEM
  11 +       depends on OF
  12 +       select GENERIC_PHY
  13 +       help
  14 +         This option enables support for the Synopsis PHYs present inside the
  15 +         Qualcomm USB3.0 DWC3 controller.  This driver supports both HS and SS
  16 +         PHY controllers.
  17 +
  18  endmenu
  19 --- a/drivers/phy/Makefile
  20 +++ b/drivers/phy/Makefile
  21 @@ -31,3 +31,4 @@ obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY)  +=
  22  obj-$(CONFIG_PHY_XGENE)                        += phy-xgene.o
  23  obj-$(CONFIG_PHY_STIH407_USB)          += phy-stih407-usb.o
  24  obj-$(CONFIG_PHY_STIH41X_USB)          += phy-stih41x-usb.o
  25 +obj-$(CONFIG_PHY_QCOM_DWC3)            += phy-qcom-dwc3.o
  26 --- /dev/null
  27 +++ b/drivers/phy/phy-qcom-dwc3.c
  28 @@ -0,0 +1,483 @@
  29 +/* Copyright (c) 2013-2014, Code Aurora Forum. All rights reserved.
  30 + *
  31 + * This program is free software; you can redistribute it and/or modify
  32 + * it under the terms of the GNU General Public License version 2 and
  33 + * only version 2 as published by the Free Software Foundation.
  34 + *
  35 + * This program is distributed in the hope that it will be useful,
  36 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  37 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  38 + * GNU General Public License for more details.
  39 + */
  40 +
  41 +#include <linux/clk.h>
  42 +#include <linux/err.h>
  43 +#include <linux/io.h>
  44 +#include <linux/module.h>
  45 +#include <linux/of.h>
  46 +#include <linux/phy/phy.h>
  47 +#include <linux/platform_device.h>
  48 +#include <linux/delay.h>
  49 +
  50 +/**
  51 + *  USB QSCRATCH Hardware registers
  52 + */
  53 +#define QSCRATCH_GENERAL_CFG           (0x08)
  54 +#define HSUSB_PHY_CTRL_REG             (0x10)
  55 +
  56 +/* PHY_CTRL_REG */
  57 +#define HSUSB_CTRL_DMSEHV_CLAMP                        BIT(24)
  58 +#define HSUSB_CTRL_USB2_SUSPEND                        BIT(23)
  59 +#define HSUSB_CTRL_UTMI_CLK_EN                 BIT(21)
  60 +#define        HSUSB_CTRL_UTMI_OTG_VBUS_VALID          BIT(20)
  61 +#define HSUSB_CTRL_USE_CLKCORE                 BIT(18)
  62 +#define HSUSB_CTRL_DPSEHV_CLAMP                        BIT(17)
  63 +#define HSUSB_CTRL_COMMONONN                   BIT(11)
  64 +#define HSUSB_CTRL_ID_HV_CLAMP                 BIT(9)
  65 +#define HSUSB_CTRL_OTGSESSVLD_CLAMP            BIT(8)
  66 +#define HSUSB_CTRL_CLAMP_EN                    BIT(7)
  67 +#define HSUSB_CTRL_RETENABLEN                  BIT(1)
  68 +#define HSUSB_CTRL_POR                         BIT(0)
  69 +
  70 +/* QSCRATCH_GENERAL_CFG */
  71 +#define HSUSB_GCFG_XHCI_REV            BIT(2)
  72 +
  73 +/**
  74 + *  USB QSCRATCH Hardware registers
  75 + */
  76 +#define SSUSB_PHY_CTRL_REG             (0x00)
  77 +#define SSUSB_PHY_PARAM_CTRL_1         (0x04)
  78 +#define SSUSB_PHY_PARAM_CTRL_2         (0x08)
  79 +#define CR_PROTOCOL_DATA_IN_REG                (0x0c)
  80 +#define CR_PROTOCOL_DATA_OUT_REG       (0x10)
  81 +#define CR_PROTOCOL_CAP_ADDR_REG       (0x14)
  82 +#define CR_PROTOCOL_CAP_DATA_REG       (0x18)
  83 +#define CR_PROTOCOL_READ_REG           (0x1c)
  84 +#define CR_PROTOCOL_WRITE_REG          (0x20)
  85 +
  86 +/* PHY_CTRL_REG */
  87 +#define SSUSB_CTRL_REF_USE_PAD         BIT(28)
  88 +#define SSUSB_CTRL_TEST_POWERDOWN      BIT(27)
  89 +#define SSUSB_CTRL_LANE0_PWR_PRESENT   BIT(24)
  90 +#define SSUSB_CTRL_SS_PHY_EN           BIT(8)
  91 +#define SSUSB_CTRL_SS_PHY_RESET                BIT(7)
  92 +
  93 +/* SSPHY control registers */
  94 +#define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * lane)
  95 +#define SSPHY_CTRL_TX_OVRD_DRV_LO(lane)        (0x1002 + 0x100 * lane)
  96 +
  97 +/* RX OVRD IN HI bits */
  98 +#define RX_OVRD_IN_HI_RX_RESET_OVRD            BIT(13)
  99 +#define RX_OVRD_IN_HI_RX_RX_RESET              BIT(12)
 100 +#define RX_OVRD_IN_HI_RX_EQ_OVRD               BIT(11)
 101 +#define RX_OVRD_IN_HI_RX_EQ_MASK               0x0700
 102 +#define RX_OVRD_IN_HI_RX_EQ_SHIFT              8
 103 +#define RX_OVRD_IN_HI_RX_EQ_EN_OVRD            BIT(7)
 104 +#define RX_OVRD_IN_HI_RX_EQ_EN                 BIT(6)
 105 +#define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD       BIT(5)
 106 +#define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK       0x0018
 107 +#define RX_OVRD_IN_HI_RX_RATE_OVRD             BIT(2)
 108 +#define RX_OVRD_IN_HI_RX_RATE_MASK             0x0003
 109 +
 110 +/* TX OVRD DRV LO register bits */
 111 +#define TX_OVRD_DRV_LO_AMPLITUDE_MASK  0x007F
 112 +#define TX_OVRD_DRV_LO_PREEMPH_MASK    0x3F80
 113 +#define TX_OVRD_DRV_LO_PREEMPH_SHIFT   7
 114 +#define TX_OVRD_DRV_LO_EN              BIT(14)
 115 +
 116 +struct qcom_dwc3_usb_phy {
 117 +       void __iomem            *base;
 118 +       struct device           *dev;
 119 +       struct phy *phy;
 120 +
 121 +       int (*phy_init)(struct qcom_dwc3_usb_phy *phy_dwc3);
 122 +       int (*phy_exit)(struct qcom_dwc3_usb_phy *phy_dwc3);
 123 +
 124 +       struct clk              *xo_clk;
 125 +       struct clk              *ref_clk;
 126 +};
 127 +
 128 +/**
 129 + * Write register and read back masked value to confirm it is written
 130 + *
 131 + * @base - QCOM DWC3 PHY base virtual address.
 132 + * @offset - register offset.
 133 + * @mask - register bitmask specifying what should be updated
 134 + * @val - value to write.
 135 + */
 136 +static inline void qcom_dwc3_phy_write_readback(
 137 +       struct qcom_dwc3_usb_phy *phy_dwc3, u32 offset,
 138 +       const u32 mask, u32 val)
 139 +{
 140 +       u32 write_val, tmp = readl(phy_dwc3->base + offset);
 141 +
 142 +       tmp &= ~mask;           /* retain other bits */
 143 +       write_val = tmp | val;
 144 +
 145 +       writel(write_val, phy_dwc3->base + offset);
 146 +
 147 +       /* Read back to see if val was written */
 148 +       tmp = readl(phy_dwc3->base + offset);
 149 +       tmp &= mask;            /* clear other bits */
 150 +
 151 +       if (tmp != val)
 152 +               dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n",
 153 +                       val, offset);
 154 +}
 155 +
 156 +static int wait_for_latch(void __iomem *addr)
 157 +{
 158 +       u32 retry = 10;
 159 +
 160 +       while (true) {
 161 +               if (!readl(addr))
 162 +                       break;
 163 +
 164 +               if (--retry == 0)
 165 +                       return -ETIMEDOUT;
 166 +
 167 +               usleep_range(10, 20);
 168 +       }
 169 +
 170 +       return 0;
 171 +}
 172 +
 173 +/**
 174 + * Write SSPHY register
 175 + *
 176 + * @base - QCOM DWC3 PHY base virtual address.
 177 + * @addr - SSPHY address to write.
 178 + * @val - value to write.
 179 + */
 180 +static int qcom_dwc3_ss_write_phycreg(void __iomem *base, u32 addr, u32 val)
 181 +{
 182 +       int ret;
 183 +
 184 +       writel(addr, base + CR_PROTOCOL_DATA_IN_REG);
 185 +       writel(0x1, base + CR_PROTOCOL_CAP_ADDR_REG);
 186 +
 187 +       ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG);
 188 +       if (ret)
 189 +               goto err_wait;
 190 +
 191 +       writel(val, base + CR_PROTOCOL_DATA_IN_REG);
 192 +       writel(0x1, base + CR_PROTOCOL_CAP_DATA_REG);
 193 +
 194 +       ret = wait_for_latch(base + CR_PROTOCOL_CAP_DATA_REG);
 195 +       if (ret)
 196 +               goto err_wait;
 197 +
 198 +       writel(0x1, base + CR_PROTOCOL_WRITE_REG);
 199 +
 200 +       ret = wait_for_latch(base + CR_PROTOCOL_WRITE_REG);
 201 +
 202 +err_wait:
 203 +       return ret;
 204 +}
 205 +
 206 +/**
 207 + * Read SSPHY register.
 208 + *
 209 + * @base - QCOM DWC3 PHY base virtual address.
 210 + * @addr - SSPHY address to read.
 211 + */
 212 +static int qcom_dwc3_ss_read_phycreg(void __iomem *base, u32 addr, u32 *val)
 213 +{
 214 +       int ret;
 215 +       bool first_read = true;
 216 +
 217 +       writel(addr, base + CR_PROTOCOL_DATA_IN_REG);
 218 +       writel(0x1, base + CR_PROTOCOL_CAP_ADDR_REG);
 219 +
 220 +       ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG);
 221 +       if (ret)
 222 +               goto err_wait;
 223 +
 224 +       /*
 225 +        * Due to hardware bug, first read of SSPHY register might be
 226 +        * incorrect. Hence as workaround, SW should perform SSPHY register
 227 +        * read twice, but use only second read and ignore first read.
 228 +        */
 229 +retry:
 230 +       writel(0x1, base + CR_PROTOCOL_READ_REG);
 231 +
 232 +       ret = wait_for_latch(base + CR_PROTOCOL_READ_REG);
 233 +       if (ret)
 234 +               goto err_wait;
 235 +
 236 +       if (first_read) {
 237 +               readl(base + CR_PROTOCOL_DATA_OUT_REG);
 238 +               first_read = false;
 239 +               goto retry;
 240 +       }
 241 +
 242 +       *val = readl(base + CR_PROTOCOL_DATA_OUT_REG);
 243 +
 244 +err_wait:
 245 +       return ret;
 246 +}
 247 +
 248 +static int qcom_dwc3_phy_power_on(struct phy *phy)
 249 +{
 250 +       int ret;
 251 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 252 +
 253 +       ret = clk_prepare_enable(phy_dwc3->xo_clk);
 254 +       if (ret)
 255 +               return ret;
 256 +
 257 +       ret = clk_prepare_enable(phy_dwc3->ref_clk);
 258 +       if (ret)
 259 +               clk_disable_unprepare(phy_dwc3->xo_clk);
 260 +
 261 +       return ret;
 262 +}
 263 +
 264 +static int qcom_dwc3_phy_power_off(struct phy *phy)
 265 +{
 266 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 267 +
 268 +       clk_disable_unprepare(phy_dwc3->ref_clk);
 269 +       clk_disable_unprepare(phy_dwc3->xo_clk);
 270 +
 271 +       return 0;
 272 +}
 273 +
 274 +static int qcom_dwc3_hs_phy_init(struct qcom_dwc3_usb_phy *phy_dwc3)
 275 +{
 276 +       u32 val;
 277 +
 278 +       /*
 279 +        * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
 280 +        * enable clamping, and disable RETENTION (power-on default is ENABLED)
 281 +        */
 282 +       val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP |
 283 +               HSUSB_CTRL_RETENABLEN  | HSUSB_CTRL_COMMONONN |
 284 +               HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP |
 285 +               HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID |
 286 +               HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70;
 287 +
 288 +       /* use core clock if external reference is not present */
 289 +       if (!phy_dwc3->xo_clk)
 290 +               val |= HSUSB_CTRL_USE_CLKCORE;
 291 +
 292 +       writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG);
 293 +       usleep_range(2000, 2200);
 294 +
 295 +       /* Disable (bypass) VBUS and ID filters */
 296 +       writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG);
 297 +
 298 +       return 0;
 299 +}
 300 +
 301 +static int qcom_dwc3_ss_phy_init(struct qcom_dwc3_usb_phy *phy_dwc3)
 302 +{
 303 +       int ret;
 304 +       u32 data = 0;
 305 +
 306 +       /* reset phy */
 307 +       data = readl_relaxed(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 308 +       writel_relaxed(data | SSUSB_CTRL_SS_PHY_RESET,
 309 +               phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 310 +       usleep_range(2000, 2200);
 311 +       writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 312 +
 313 +       /* clear REF_PAD if we don't have XO clk */
 314 +       if (!phy_dwc3->xo_clk)
 315 +               data &= ~SSUSB_CTRL_REF_USE_PAD;
 316 +       else
 317 +               data |= SSUSB_CTRL_REF_USE_PAD;
 318 +
 319 +       writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 320 +       msleep(30);
 321 +
 322 +       data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT;
 323 +       writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 324 +
 325 +       /*
 326 +        * Fix RX Equalization setting as follows
 327 +        * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
 328 +        * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
 329 +        * LANE0.RX_OVRD_IN_HI.RX_EQ set to 3
 330 +        * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
 331 +        */
 332 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
 333 +                       SSPHY_CTRL_RX_OVRD_IN_HI(0), &data);
 334 +       if (ret)
 335 +               goto err_phy_trans;
 336 +
 337 +       data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
 338 +       data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
 339 +       data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
 340 +       data |= 0x3 << RX_OVRD_IN_HI_RX_EQ_SHIFT;
 341 +       data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
 342 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3->base,
 343 +               SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
 344 +       if (ret)
 345 +               goto err_phy_trans;
 346 +
 347 +       /*
 348 +        * Set EQ and TX launch amplitudes as follows
 349 +        * LANE0.TX_OVRD_DRV_LO.PREEMPH set to 22
 350 +        * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 127
 351 +        * LANE0.TX_OVRD_DRV_LO.EN set to 1.
 352 +        */
 353 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
 354 +               SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data);
 355 +       if (ret)
 356 +               goto err_phy_trans;
 357 +
 358 +       data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
 359 +       data |= 0x16 << TX_OVRD_DRV_LO_PREEMPH_SHIFT;
 360 +       data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
 361 +       data |= 0x7f;
 362 +       data |= TX_OVRD_DRV_LO_EN;
 363 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3->base,
 364 +               SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
 365 +       if (ret)
 366 +               goto err_phy_trans;
 367 +
 368 +       /*
 369 +        * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
 370 +        * TX_FULL_SWING [26:20] amplitude to 127
 371 +        * TX_DEEMPH_3_5DB [13:8] to 22
 372 +        * LOS_BIAS [2:0] to 0x5
 373 +        */
 374 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
 375 +                                  0x07f03f07, 0x07f01605);
 376 +
 377 +err_phy_trans:
 378 +       return ret;
 379 +}
 380 +
 381 +static int qcom_dwc3_ss_phy_exit(struct qcom_dwc3_usb_phy *phy_dwc3)
 382 +{
 383 +       /* Sequence to put SSPHY in low power state:
 384 +        * 1. Clear REF_PHY_EN in PHY_CTRL_REG
 385 +        * 2. Clear REF_USE_PAD in PHY_CTRL_REG
 386 +        * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention
 387 +        * 4. Disable SSPHY ref clk
 388 +        */
 389 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 390 +               SSUSB_CTRL_SS_PHY_EN, 0x0);
 391 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 392 +               SSUSB_CTRL_REF_USE_PAD, 0x0);
 393 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 394 +               0x0, SSUSB_CTRL_TEST_POWERDOWN);
 395 +
 396 +       return 0;
 397 +}
 398 +
 399 +static int qcom_dwc3_phy_init(struct phy *phy)
 400 +{
 401 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 402 +
 403 +       if (phy_dwc3->phy_init)
 404 +               return phy_dwc3->phy_init(phy_dwc3);
 405 +
 406 +       return 0;
 407 +}
 408 +
 409 +static int qcom_dwc3_phy_exit(struct phy *phy)
 410 +{
 411 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 412 +
 413 +       if (phy_dwc3->phy_exit)
 414 +               return qcom_dwc3_ss_phy_exit(phy_dwc3);
 415 +
 416 +       return 0;
 417 +}
 418 +
 419 +static struct phy_ops qcom_dwc3_phy_ops = {
 420 +       .init           = qcom_dwc3_phy_init,
 421 +       .exit           = qcom_dwc3_phy_exit,
 422 +       .power_on       = qcom_dwc3_phy_power_on,
 423 +       .power_off      = qcom_dwc3_phy_power_off,
 424 +       .owner          = THIS_MODULE,
 425 +};
 426 +
 427 +static const struct of_device_id qcom_dwc3_phy_table[] = {
 428 +       { .compatible = "qcom,dwc3-hs-usb-phy", },
 429 +       { .compatible = "qcom,dwc3-ss-usb-phy", },
 430 +       { /* Sentinel */ }
 431 +};
 432 +MODULE_DEVICE_TABLE(of, qcom_dwc3_phy_table);
 433 +
 434 +static int qcom_dwc3_phy_probe(struct platform_device *pdev)
 435 +{
 436 +       struct qcom_dwc3_usb_phy        *phy_dwc3;
 437 +       struct phy_provider             *phy_provider;
 438 +       struct resource                 *res;
 439 +
 440 +       phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
 441 +       if (!phy_dwc3)
 442 +               return -ENOMEM;
 443 +
 444 +       platform_set_drvdata(pdev, phy_dwc3);
 445 +
 446 +       phy_dwc3->dev = &pdev->dev;
 447 +
 448 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 449 +       phy_dwc3->base = devm_ioremap_resource(phy_dwc3->dev, res);
 450 +       if (IS_ERR(phy_dwc3->base))
 451 +               return PTR_ERR(phy_dwc3->base);
 452 +
 453 +       phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
 454 +       if (IS_ERR(phy_dwc3->ref_clk)) {
 455 +               dev_dbg(phy_dwc3->dev, "cannot get reference clock\n");
 456 +               return PTR_ERR(phy_dwc3->ref_clk);
 457 +       }
 458 +
 459 +       if (of_device_is_compatible(pdev->dev.of_node,
 460 +                       "qcom,dwc3-hs-usb-phy")) {
 461 +               clk_set_rate(phy_dwc3->ref_clk, 60000000);
 462 +               phy_dwc3->phy_init = qcom_dwc3_hs_phy_init;
 463 +       } else if (of_device_is_compatible(pdev->dev.of_node,
 464 +                       "qcom,dwc3-ss-usb-phy")) {
 465 +               phy_dwc3->phy_init = qcom_dwc3_ss_phy_init;
 466 +               phy_dwc3->phy_exit = qcom_dwc3_ss_phy_exit;
 467 +               clk_set_rate(phy_dwc3->ref_clk, 125000000);
 468 +       } else {
 469 +               dev_err(phy_dwc3->dev, "Unknown phy\n");
 470 +               return -EINVAL;
 471 +       }
 472 +
 473 +       phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo");
 474 +       if (IS_ERR(phy_dwc3->xo_clk)) {
 475 +               dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n");
 476 +               phy_dwc3->xo_clk = NULL;
 477 +       }
 478 +
 479 +       phy_dwc3->phy = devm_phy_create(phy_dwc3->dev, NULL, &qcom_dwc3_phy_ops,
 480 +                                       NULL);
 481 +
 482 +       if (IS_ERR(phy_dwc3->phy))
 483 +               return PTR_ERR(phy_dwc3->phy);
 484 +
 485 +       phy_set_drvdata(phy_dwc3->phy, phy_dwc3);
 486 +
 487 +       phy_provider = devm_of_phy_provider_register(phy_dwc3->dev,
 488 +                       of_phy_simple_xlate);
 489 +
 490 +       if (IS_ERR(phy_provider))
 491 +               return PTR_ERR(phy_provider);
 492 +
 493 +       return 0;
 494 +}
 495 +
 496 +static struct platform_driver qcom_dwc3_phy_driver = {
 497 +       .probe          = qcom_dwc3_phy_probe,
 498 +       .driver         = {
 499 +               .name   = "qcom-dwc3-usb-phy",
 500 +               .owner  = THIS_MODULE,
 501 +               .of_match_table = qcom_dwc3_phy_table,
 502 +       },
 503 +};
 504 +
 505 +module_platform_driver(qcom_dwc3_phy_driver);
 506 +
 507 +MODULE_ALIAS("platform:phy-qcom-dwc3");
 508 +MODULE_LICENSE("GPL v2");
 509 +MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
 510 +MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
 511 +MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");