target/linux/ipq806x/patches-4.4/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch

   1 --- a/drivers/phy/Kconfig
   2 +++ b/drivers/phy/Kconfig
   3 @@ -391,4 +391,15 @@ config PHY_CYGNUS_PCIE
   4           Enable this to support the Broadcom Cygnus PCIe PHY.
   5           If unsure, say N.
   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 @@ -48,3 +48,4 @@ obj-$(CONFIG_PHY_TUSB1210)            += phy-tusb1
  22  obj-$(CONFIG_PHY_BRCMSTB_SATA)         += phy-brcmstb-sata.o
  23  obj-$(CONFIG_PHY_PISTACHIO_USB)                += phy-pistachio-usb.o
  24  obj-$(CONFIG_PHY_CYGNUS_PCIE)          += phy-bcm-cygnus-pcie.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 +1,484 @@
  29 +/* Copyright (c) 2014-2015, 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 +/* SS CAP register bits */
 117 +#define SS_CR_CAP_ADDR_REG             BIT(0)
 118 +#define SS_CR_CAP_DATA_REG             BIT(0)
 119 +#define SS_CR_READ_REG                 BIT(0)
 120 +#define SS_CR_WRITE_REG                        BIT(0)
 121 +
 122 +struct qcom_dwc3_usb_phy {
 123 +       void __iomem            *base;
 124 +       struct device           *dev;
 125 +       struct clk              *xo_clk;
 126 +       struct clk              *ref_clk;
 127 +};
 128 +
 129 +struct qcom_dwc3_phy_drvdata {
 130 +       struct phy_ops  ops;
 131 +       u32             clk_rate;
 132 +};
 133 +
 134 +/**
 135 + * Write register and read back masked value to confirm it is written
 136 + *
 137 + * @base - QCOM DWC3 PHY base virtual address.
 138 + * @offset - register offset.
 139 + * @mask - register bitmask specifying what should be updated
 140 + * @val - value to write.
 141 + */
 142 +static inline void qcom_dwc3_phy_write_readback(
 143 +       struct qcom_dwc3_usb_phy *phy_dwc3, u32 offset,
 144 +       const u32 mask, u32 val)
 145 +{
 146 +       u32 write_val, tmp = readl(phy_dwc3->base + offset);
 147 +
 148 +       tmp &= ~mask;           /* retain other bits */
 149 +       write_val = tmp | val;
 150 +
 151 +       writel(write_val, phy_dwc3->base + offset);
 152 +
 153 +       /* Read back to see if val was written */
 154 +       tmp = readl(phy_dwc3->base + offset);
 155 +       tmp &= mask;            /* clear other bits */
 156 +
 157 +       if (tmp != val)
 158 +               dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n",
 159 +                       val, offset);
 160 +}
 161 +
 162 +static int wait_for_latch(void __iomem *addr)
 163 +{
 164 +       u32 retry = 10;
 165 +
 166 +       while (true) {
 167 +               if (!readl(addr))
 168 +                       break;
 169 +
 170 +               if (--retry == 0)
 171 +                       return -ETIMEDOUT;
 172 +
 173 +               usleep_range(10, 20);
 174 +       }
 175 +
 176 +       return 0;
 177 +}
 178 +
 179 +/**
 180 + * Write SSPHY register
 181 + *
 182 + * @base - QCOM DWC3 PHY base virtual address.
 183 + * @addr - SSPHY address to write.
 184 + * @val - value to write.
 185 + */
 186 +static int qcom_dwc3_ss_write_phycreg(struct qcom_dwc3_usb_phy *phy_dwc3,
 187 +                                       u32 addr, u32 val)
 188 +{
 189 +       int ret;
 190 +
 191 +       writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
 192 +       writel(SS_CR_CAP_ADDR_REG, phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
 193 +
 194 +       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
 195 +       if (ret)
 196 +               goto err_wait;
 197 +
 198 +       writel(val, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
 199 +       writel(SS_CR_CAP_DATA_REG, phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG);
 200 +
 201 +       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG);
 202 +       if (ret)
 203 +               goto err_wait;
 204 +
 205 +       writel(SS_CR_WRITE_REG, phy_dwc3->base + CR_PROTOCOL_WRITE_REG);
 206 +
 207 +       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_WRITE_REG);
 208 +
 209 +err_wait:
 210 +       if (ret)
 211 +               dev_err(phy_dwc3->dev, "timeout waiting for latch\n");
 212 +       return ret;
 213 +}
 214 +
 215 +/**
 216 + * Read SSPHY register.
 217 + *
 218 + * @base - QCOM DWC3 PHY base virtual address.
 219 + * @addr - SSPHY address to read.
 220 + */
 221 +static int qcom_dwc3_ss_read_phycreg(void __iomem *base, u32 addr, u32 *val)
 222 +{
 223 +       int ret;
 224 +
 225 +       writel(addr, base + CR_PROTOCOL_DATA_IN_REG);
 226 +       writel(SS_CR_CAP_ADDR_REG, base + CR_PROTOCOL_CAP_ADDR_REG);
 227 +
 228 +       ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG);
 229 +       if (ret)
 230 +               goto err_wait;
 231 +
 232 +       /*
 233 +        * Due to hardware bug, first read of SSPHY register might be
 234 +        * incorrect. Hence as workaround, SW should perform SSPHY register
 235 +        * read twice, but use only second read and ignore first read.
 236 +        */
 237 +       writel(SS_CR_READ_REG, base + CR_PROTOCOL_READ_REG);
 238 +
 239 +       ret = wait_for_latch(base + CR_PROTOCOL_READ_REG);
 240 +       if (ret)
 241 +               goto err_wait;
 242 +
 243 +       /* throwaway read */
 244 +       readl(base + CR_PROTOCOL_DATA_OUT_REG);
 245 +
 246 +       writel(SS_CR_READ_REG, base + CR_PROTOCOL_READ_REG);
 247 +
 248 +       ret = wait_for_latch(base + CR_PROTOCOL_READ_REG);
 249 +       if (ret)
 250 +               goto err_wait;
 251 +
 252 +       *val = readl(base + CR_PROTOCOL_DATA_OUT_REG);
 253 +
 254 +err_wait:
 255 +       return ret;
 256 +}
 257 +
 258 +static int qcom_dwc3_phy_power_on(struct phy *phy)
 259 +{
 260 +       int ret;
 261 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 262 +
 263 +       ret = clk_prepare_enable(phy_dwc3->xo_clk);
 264 +       if (ret)
 265 +               return ret;
 266 +
 267 +       ret = clk_prepare_enable(phy_dwc3->ref_clk);
 268 +       if (ret)
 269 +               clk_disable_unprepare(phy_dwc3->xo_clk);
 270 +
 271 +       return ret;
 272 +}
 273 +
 274 +static int qcom_dwc3_phy_power_off(struct phy *phy)
 275 +{
 276 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 277 +
 278 +       clk_disable_unprepare(phy_dwc3->ref_clk);
 279 +       clk_disable_unprepare(phy_dwc3->xo_clk);
 280 +
 281 +       return 0;
 282 +}
 283 +
 284 +static int qcom_dwc3_hs_phy_init(struct phy *phy)
 285 +{
 286 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 287 +       u32 val;
 288 +
 289 +       /*
 290 +        * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
 291 +        * enable clamping, and disable RETENTION (power-on default is ENABLED)
 292 +        */
 293 +       val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP |
 294 +               HSUSB_CTRL_RETENABLEN  | HSUSB_CTRL_COMMONONN |
 295 +               HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP |
 296 +               HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID |
 297 +               HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70;
 298 +
 299 +       /* use core clock if external reference is not present */
 300 +       if (!phy_dwc3->xo_clk)
 301 +               val |= HSUSB_CTRL_USE_CLKCORE;
 302 +
 303 +       writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG);
 304 +       usleep_range(2000, 2200);
 305 +
 306 +       /* Disable (bypass) VBUS and ID filters */
 307 +       writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG);
 308 +
 309 +       return 0;
 310 +}
 311 +
 312 +static int qcom_dwc3_ss_phy_init(struct phy *phy)
 313 +{
 314 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 315 +       int ret;
 316 +       u32 data = 0;
 317 +
 318 +       /* reset phy */
 319 +       data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 320 +       writel(data | SSUSB_CTRL_SS_PHY_RESET,
 321 +               phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 322 +       usleep_range(2000, 2200);
 323 +       writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 324 +
 325 +       /* clear REF_PAD if we don't have XO clk */
 326 +       if (!phy_dwc3->xo_clk)
 327 +               data &= ~SSUSB_CTRL_REF_USE_PAD;
 328 +       else
 329 +               data |= SSUSB_CTRL_REF_USE_PAD;
 330 +
 331 +       writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 332 +
 333 +       /* wait for ref clk to become stable, this can take up to 30ms */
 334 +       msleep(30);
 335 +
 336 +       data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT;
 337 +       writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
 338 +
 339 +       /*
 340 +        * Fix RX Equalization setting as follows
 341 +        * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
 342 +        * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
 343 +        * LANE0.RX_OVRD_IN_HI.RX_EQ set to 3
 344 +        * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
 345 +        */
 346 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
 347 +                       SSPHY_CTRL_RX_OVRD_IN_HI(0), &data);
 348 +       if (ret)
 349 +               goto err_phy_trans;
 350 +
 351 +       data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
 352 +       data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
 353 +       data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
 354 +       data |= 0x3 << RX_OVRD_IN_HI_RX_EQ_SHIFT;
 355 +       data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
 356 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3,
 357 +               SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
 358 +       if (ret)
 359 +               goto err_phy_trans;
 360 +
 361 +       /*
 362 +        * Set EQ and TX launch amplitudes as follows
 363 +        * LANE0.TX_OVRD_DRV_LO.PREEMPH set to 22
 364 +        * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 127
 365 +        * LANE0.TX_OVRD_DRV_LO.EN set to 1.
 366 +        */
 367 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
 368 +               SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data);
 369 +       if (ret)
 370 +               goto err_phy_trans;
 371 +
 372 +       data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
 373 +       data |= 0x16 << TX_OVRD_DRV_LO_PREEMPH_SHIFT;
 374 +       data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
 375 +       data |= 0x7f;
 376 +       data |= TX_OVRD_DRV_LO_EN;
 377 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3,
 378 +               SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
 379 +       if (ret)
 380 +               goto err_phy_trans;
 381 +
 382 +       /*
 383 +        * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
 384 +        * TX_FULL_SWING [26:20] amplitude to 127
 385 +        * TX_DEEMPH_3_5DB [13:8] to 22
 386 +        * LOS_BIAS [2:0] to 0x5
 387 +        */
 388 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
 389 +                                  0x07f03f07, 0x07f01605);
 390 +
 391 +err_phy_trans:
 392 +       return ret;
 393 +}
 394 +
 395 +static int qcom_dwc3_ss_phy_exit(struct phy *phy)
 396 +{
 397 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 398 +
 399 +       /* Sequence to put SSPHY in low power state:
 400 +        * 1. Clear REF_PHY_EN in PHY_CTRL_REG
 401 +        * 2. Clear REF_USE_PAD in PHY_CTRL_REG
 402 +        * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention
 403 +        */
 404 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 405 +               SSUSB_CTRL_SS_PHY_EN, 0x0);
 406 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 407 +               SSUSB_CTRL_REF_USE_PAD, 0x0);
 408 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 409 +               0x0, SSUSB_CTRL_TEST_POWERDOWN);
 410 +
 411 +       return 0;
 412 +}
 413 +
 414 +static const struct qcom_dwc3_phy_drvdata qcom_dwc3_hs_drvdata = {
 415 +       .ops = {
 416 +               .init           = qcom_dwc3_hs_phy_init,
 417 +               .power_on       = qcom_dwc3_phy_power_on,
 418 +               .power_off      = qcom_dwc3_phy_power_off,
 419 +               .owner          = THIS_MODULE,
 420 +       },
 421 +       .clk_rate = 60000000,
 422 +};
 423 +
 424 +static const struct qcom_dwc3_phy_drvdata qcom_dwc3_ss_drvdata = {
 425 +       .ops = {
 426 +               .init           = qcom_dwc3_ss_phy_init,
 427 +               .exit           = qcom_dwc3_ss_phy_exit,
 428 +               .power_on       = qcom_dwc3_phy_power_on,
 429 +               .power_off      = qcom_dwc3_phy_power_off,
 430 +               .owner          = THIS_MODULE,
 431 +       },
 432 +       .clk_rate = 125000000,
 433 +};
 434 +
 435 +static const struct of_device_id qcom_dwc3_phy_table[] = {
 436 +       { .compatible = "qcom,dwc3-hs-usb-phy", .data = &qcom_dwc3_hs_drvdata },
 437 +       { .compatible = "qcom,dwc3-ss-usb-phy", .data = &qcom_dwc3_ss_drvdata },
 438 +       { /* Sentinel */ }
 439 +};
 440 +MODULE_DEVICE_TABLE(of, qcom_dwc3_phy_table);
 441 +
 442 +static int qcom_dwc3_phy_probe(struct platform_device *pdev)
 443 +{
 444 +       struct qcom_dwc3_usb_phy        *phy_dwc3;
 445 +       struct phy_provider             *phy_provider;
 446 +       struct phy                      *generic_phy;
 447 +       struct resource                 *res;
 448 +       const struct of_device_id *match;
 449 +       const struct qcom_dwc3_phy_drvdata *data;
 450 +
 451 +       phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
 452 +       if (!phy_dwc3)
 453 +               return -ENOMEM;
 454 +
 455 +       match = of_match_node(qcom_dwc3_phy_table, pdev->dev.of_node);
 456 +       data = match->data;
 457 +
 458 +       phy_dwc3->dev = &pdev->dev;
 459 +
 460 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 461 +       phy_dwc3->base = devm_ioremap_resource(phy_dwc3->dev, res);
 462 +       if (IS_ERR(phy_dwc3->base))
 463 +               return PTR_ERR(phy_dwc3->base);
 464 +
 465 +       phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
 466 +       if (IS_ERR(phy_dwc3->ref_clk)) {
 467 +               dev_dbg(phy_dwc3->dev, "cannot get reference clock\n");
 468 +               return PTR_ERR(phy_dwc3->ref_clk);
 469 +       }
 470 +
 471 +       clk_set_rate(phy_dwc3->ref_clk, data->clk_rate);
 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 +       generic_phy = devm_phy_create(phy_dwc3->dev, pdev->dev.of_node,
 480 +                                     &data->ops);
 481 +
 482 +       if (IS_ERR(generic_phy))
 483 +               return PTR_ERR(generic_phy);
 484 +
 485 +       phy_set_drvdata(generic_phy, phy_dwc3);
 486 +       platform_set_drvdata(pdev, phy_dwc3);
 487 +
 488 +       phy_provider = devm_of_phy_provider_register(phy_dwc3->dev,
 489 +                       of_phy_simple_xlate);
 490 +
 491 +       if (IS_ERR(phy_provider))
 492 +               return PTR_ERR(phy_provider);
 493 +
 494 +       return 0;
 495 +}
 496 +
 497 +static struct platform_driver qcom_dwc3_phy_driver = {
 498 +       .probe          = qcom_dwc3_phy_probe,
 499 +       .driver         = {
 500 +               .name   = "qcom-dwc3-usb-phy",
 501 +               .owner  = THIS_MODULE,
 502 +               .of_match_table = qcom_dwc3_phy_table,
 503 +       },
 504 +};
 505 +
 506 +module_platform_driver(qcom_dwc3_phy_driver);
 507 +
 508 +MODULE_ALIAS("platform:phy-qcom-dwc3");
 509 +MODULE_LICENSE("GPL v2");
 510 +MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
 511 +MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
 512 +MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");