drivers/usb/dwc3/dwc3-meson-g12a.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * USB Glue for Amlogic G12A SoCs
   4  *
   5  * Copyright (c) 2019 BayLibre, SAS
   6  * Author: Neil Armstrong <[email protected]>
   7  */
   8
   9 /*
  10  * The USB is organized with a glue around the DWC3 Controller IP as :
  11  * - Control registers for each USB2 Ports
  12  * - Control registers for the USB PHY layer
  13  * - SuperSpeed PHY can be enabled only if port is used
  14  *
  15  * TOFIX:
  16  * - Add dynamic OTG switching with ID change interrupt
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/clk.h>
  23 #include <linux/of.h>
  24 #include <linux/of_platform.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/regmap.h>
  27 #include <linux/bitfield.h>
  28 #include <linux/bitops.h>
  29 #include <linux/reset.h>
  30 #include <linux/phy/phy.h>
  31 #include <linux/usb/otg.h>
  32 #include <linux/usb/role.h>
  33 #include <linux/regulator/consumer.h>
  34
  35 /* USB2 Ports Control Registers */
  36
  37 #define U2P_REG_SIZE                                            0x20
  38
  39 #define U2P_R0                                                  0x0
  40         #define U2P_R0_HOST_DEVICE                              BIT(0)
  41         #define U2P_R0_POWER_OK                                 BIT(1)
  42         #define U2P_R0_HAST_MODE                                BIT(2)
  43         #define U2P_R0_POWER_ON_RESET                           BIT(3)
  44         #define U2P_R0_ID_PULLUP                                BIT(4)
  45         #define U2P_R0_DRV_VBUS                                 BIT(5)
  46
  47 #define U2P_R1                                                  0x4
  48         #define U2P_R1_PHY_READY                                BIT(0)
  49         #define U2P_R1_ID_DIG                                   BIT(1)
  50         #define U2P_R1_OTG_SESSION_VALID                        BIT(2)
  51         #define U2P_R1_VBUS_VALID                               BIT(3)
  52
  53 /* USB Glue Control Registers */
  54
  55 #define USB_R0                                                  0x80
  56         #define USB_R0_P30_LANE0_TX2RX_LOOPBACK                 BIT(17)
  57         #define USB_R0_P30_LANE0_EXT_PCLK_REQ                   BIT(18)
  58         #define USB_R0_P30_PCS_RX_LOS_MASK_VAL_MASK             GENMASK(28, 19)
  59         #define USB_R0_U2D_SS_SCALEDOWN_MODE_MASK               GENMASK(30, 29)
  60         #define USB_R0_U2D_ACT                                  BIT(31)
  61
  62 #define USB_R1                                                  0x84
  63         #define USB_R1_U3H_BIGENDIAN_GS                         BIT(0)
  64         #define USB_R1_U3H_PME_ENABLE                           BIT(1)
  65         #define USB_R1_U3H_HUB_PORT_OVERCURRENT_MASK            GENMASK(4, 2)
  66         #define USB_R1_U3H_HUB_PORT_PERM_ATTACH_MASK            GENMASK(9, 7)
  67         #define USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK            GENMASK(13, 12)
  68         #define USB_R1_U3H_HOST_U3_PORT_DISABLE                 BIT(16)
  69         #define USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT      BIT(17)
  70         #define USB_R1_U3H_HOST_MSI_ENABLE                      BIT(18)
  71         #define USB_R1_U3H_FLADJ_30MHZ_REG_MASK                 GENMASK(24, 19)
  72         #define USB_R1_P30_PCS_TX_SWING_FULL_MASK               GENMASK(31, 25)
  73
  74 #define USB_R2                                                  0x88
  75         #define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK             GENMASK(25, 20)
  76         #define USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK               GENMASK(31, 26)
  77
  78 #define USB_R3                                                  0x8c
  79         #define USB_R3_P30_SSC_ENABLE                           BIT(0)
  80         #define USB_R3_P30_SSC_RANGE_MASK                       GENMASK(3, 1)
  81         #define USB_R3_P30_SSC_REF_CLK_SEL_MASK                 GENMASK(12, 4)
  82         #define USB_R3_P30_REF_SSP_EN                           BIT(13)
  83
  84 #define USB_R4                                                  0x90
  85         #define USB_R4_P21_PORT_RESET_0                         BIT(0)
  86         #define USB_R4_P21_SLEEP_M0                             BIT(1)
  87         #define USB_R4_MEM_PD_MASK                              GENMASK(3, 2)
  88         #define USB_R4_P21_ONLY                                 BIT(4)
  89
  90 #define USB_R5                                                  0x94
  91         #define USB_R5_ID_DIG_SYNC                              BIT(0)
  92         #define USB_R5_ID_DIG_REG                               BIT(1)
  93         #define USB_R5_ID_DIG_CFG_MASK                          GENMASK(3, 2)
  94         #define USB_R5_ID_DIG_EN_0                              BIT(4)
  95         #define USB_R5_ID_DIG_EN_1                              BIT(5)
  96         #define USB_R5_ID_DIG_CURR                              BIT(6)
  97         #define USB_R5_ID_DIG_IRQ                               BIT(7)
  98         #define USB_R5_ID_DIG_TH_MASK                           GENMASK(15, 8)
  99         #define USB_R5_ID_DIG_CNT_MASK                          GENMASK(23, 16)
 100
 101 enum {
 102         USB2_HOST_PHY = 0,
 103         USB2_OTG_PHY,
 104         USB3_HOST_PHY,
 105         PHY_COUNT,
 106 };
 107
 108 static const char *phy_names[PHY_COUNT] = {
 109         "usb2-phy0", "usb2-phy1", "usb3-phy0",
 110 };
 111
 112 struct dwc3_meson_g12a {
 113         struct device           *dev;
 114         struct regmap           *regmap;
 115         struct clk              *clk;
 116         struct reset_control    *reset;
 117         struct phy              *phys[PHY_COUNT];
 118         enum usb_dr_mode        otg_mode;
 119         enum phy_mode           otg_phy_mode;
 120         unsigned int            usb2_ports;
 121         unsigned int            usb3_ports;
 122         struct regulator        *vbus;
 123         struct usb_role_switch_desc switch_desc;
 124         struct usb_role_switch  *role_switch;
 125 };
 126
 127 static void dwc3_meson_g12a_usb2_set_mode(struct dwc3_meson_g12a *priv,
 128                                           int i, enum phy_mode mode)
 129 {
 130         if (mode == PHY_MODE_USB_HOST)
 131                 regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
 132                                 U2P_R0_HOST_DEVICE,
 133                                 U2P_R0_HOST_DEVICE);
 134         else
 135                 regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
 136                                 U2P_R0_HOST_DEVICE, 0);
 137 }
 138
 139 static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv)
 140 {
 141         int i;
 142
 143         if (priv->otg_mode == USB_DR_MODE_PERIPHERAL)
 144                 priv->otg_phy_mode = PHY_MODE_USB_DEVICE;
 145         else
 146                 priv->otg_phy_mode = PHY_MODE_USB_HOST;
 147
 148         for (i = 0 ; i < USB3_HOST_PHY ; ++i) {
 149                 if (!priv->phys[i])
 150                         continue;
 151
 152                 regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
 153                                    U2P_R0_POWER_ON_RESET,
 154                                    U2P_R0_POWER_ON_RESET);
 155
 156                 if (i == USB2_OTG_PHY) {
 157                         regmap_update_bits(priv->regmap,
 158                                 U2P_R0 + (U2P_REG_SIZE * i),
 159                                 U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS,
 160                                 U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS);
 161
 162                         dwc3_meson_g12a_usb2_set_mode(priv, i,
 163                                                       priv->otg_phy_mode);
 164                 } else
 165                         dwc3_meson_g12a_usb2_set_mode(priv, i,
 166                                                       PHY_MODE_USB_HOST);
 167
 168                 regmap_update_bits(priv->regmap, U2P_R0 + (U2P_REG_SIZE * i),
 169                                    U2P_R0_POWER_ON_RESET, 0);
 170         }
 171
 172         return 0;
 173 }
 174
 175 static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv)
 176 {
 177         regmap_update_bits(priv->regmap, USB_R3,
 178                         USB_R3_P30_SSC_RANGE_MASK |
 179                         USB_R3_P30_REF_SSP_EN,
 180                         USB_R3_P30_SSC_ENABLE |
 181                         FIELD_PREP(USB_R3_P30_SSC_RANGE_MASK, 2) |
 182                         USB_R3_P30_REF_SSP_EN);
 183         udelay(2);
 184
 185         regmap_update_bits(priv->regmap, USB_R2,
 186                         USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK,
 187                         FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK, 0x15));
 188
 189         regmap_update_bits(priv->regmap, USB_R2,
 190                         USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK,
 191                         FIELD_PREP(USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK, 0x20));
 192
 193         udelay(2);
 194
 195         regmap_update_bits(priv->regmap, USB_R1,
 196                         USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT,
 197                         USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT);
 198
 199         regmap_update_bits(priv->regmap, USB_R1,
 200                         USB_R1_P30_PCS_TX_SWING_FULL_MASK,
 201                         FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127));
 202 }
 203
 204 static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv)
 205 {
 206         if (priv->otg_phy_mode == PHY_MODE_USB_DEVICE) {
 207                 regmap_update_bits(priv->regmap, USB_R0,
 208                                 USB_R0_U2D_ACT, USB_R0_U2D_ACT);
 209                 regmap_update_bits(priv->regmap, USB_R0,
 210                                 USB_R0_U2D_SS_SCALEDOWN_MODE_MASK, 0);
 211                 regmap_update_bits(priv->regmap, USB_R4,
 212                                 USB_R4_P21_SLEEP_M0, USB_R4_P21_SLEEP_M0);
 213         } else {
 214                 regmap_update_bits(priv->regmap, USB_R0,
 215                                 USB_R0_U2D_ACT, 0);
 216                 regmap_update_bits(priv->regmap, USB_R4,
 217                                 USB_R4_P21_SLEEP_M0, 0);
 218         }
 219 }
 220
 221 static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv)
 222 {
 223         int ret;
 224
 225         ret = dwc3_meson_g12a_usb2_init(priv);
 226         if (ret)
 227                 return ret;
 228
 229         regmap_update_bits(priv->regmap, USB_R1,
 230                         USB_R1_U3H_FLADJ_30MHZ_REG_MASK,
 231                         FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20));
 232
 233         regmap_update_bits(priv->regmap, USB_R5,
 234                         USB_R5_ID_DIG_EN_0,
 235                         USB_R5_ID_DIG_EN_0);
 236         regmap_update_bits(priv->regmap, USB_R5,
 237                         USB_R5_ID_DIG_EN_1,
 238                         USB_R5_ID_DIG_EN_1);
 239         regmap_update_bits(priv->regmap, USB_R5,
 240                         USB_R5_ID_DIG_TH_MASK,
 241                         FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff));
 242
 243         /* If we have an actual SuperSpeed port, initialize it */
 244         if (priv->usb3_ports)
 245                 dwc3_meson_g12a_usb3_init(priv);
 246
 247         dwc3_meson_g12a_usb_otg_apply_mode(priv);
 248
 249         return 0;
 250 }
 251
 252 static const struct regmap_config phy_meson_g12a_usb3_regmap_conf = {
 253         .reg_bits = 8,
 254         .val_bits = 32,
 255         .reg_stride = 4,
 256         .max_register = USB_R5,
 257 };
 258
 259 static int dwc3_meson_g12a_get_phys(struct dwc3_meson_g12a *priv)
 260 {
 261         int i;
 262
 263         for (i = 0 ; i < PHY_COUNT ; ++i) {
 264                 priv->phys[i] = devm_phy_optional_get(priv->dev, phy_names[i]);
 265                 if (!priv->phys[i])
 266                         continue;
 267
 268                 if (IS_ERR(priv->phys[i]))
 269                         return PTR_ERR(priv->phys[i]);
 270
 271                 if (i == USB3_HOST_PHY)
 272                         priv->usb3_ports++;
 273                 else
 274                         priv->usb2_ports++;
 275         }
 276
 277         dev_info(priv->dev, "USB2 ports: %d\n", priv->usb2_ports);
 278         dev_info(priv->dev, "USB3 ports: %d\n", priv->usb3_ports);
 279
 280         return 0;
 281 }
 282
 283 static enum phy_mode dwc3_meson_g12a_get_id(struct dwc3_meson_g12a *priv)
 284 {
 285         u32 reg;
 286
 287         regmap_read(priv->regmap, USB_R5, &reg);
 288
 289         if (reg & (USB_R5_ID_DIG_SYNC | USB_R5_ID_DIG_REG))
 290                 return PHY_MODE_USB_DEVICE;
 291
 292         return PHY_MODE_USB_HOST;
 293 }
 294
 295 static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv,
 296                                         enum phy_mode mode)
 297 {
 298         int ret;
 299
 300         if (!priv->phys[USB2_OTG_PHY])
 301                 return -EINVAL;
 302
 303         if (mode == PHY_MODE_USB_HOST)
 304                 dev_info(priv->dev, "switching to Host Mode\n");
 305         else
 306                 dev_info(priv->dev, "switching to Device Mode\n");
 307
 308         if (priv->vbus) {
 309                 if (mode == PHY_MODE_USB_DEVICE)
 310                         ret = regulator_disable(priv->vbus);
 311                 else
 312                         ret = regulator_enable(priv->vbus);
 313                 if (ret)
 314                         return ret;
 315         }
 316
 317         priv->otg_phy_mode = mode;
 318
 319         dwc3_meson_g12a_usb2_set_mode(priv, USB2_OTG_PHY, mode);
 320
 321         dwc3_meson_g12a_usb_otg_apply_mode(priv);
 322
 323         return 0;
 324 }
 325
 326 static int dwc3_meson_g12a_role_set(struct device *dev, enum usb_role role)
 327 {
 328         struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
 329         enum phy_mode mode;
 330
 331         if (role == USB_ROLE_NONE)
 332                 return 0;
 333
 334         mode = (role == USB_ROLE_HOST) ? PHY_MODE_USB_HOST
 335                                        : PHY_MODE_USB_DEVICE;
 336
 337         if (mode == priv->otg_phy_mode)
 338                 return 0;
 339
 340         return dwc3_meson_g12a_otg_mode_set(priv, mode);
 341 }
 342
 343 static enum usb_role dwc3_meson_g12a_role_get(struct device *dev)
 344 {
 345         struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
 346
 347         return priv->otg_phy_mode == PHY_MODE_USB_HOST ?
 348                 USB_ROLE_HOST : USB_ROLE_DEVICE;
 349 }
 350
 351 static struct device *dwc3_meson_g12_find_child(struct device *dev,
 352                                                 const char *compatible)
 353 {
 354         struct platform_device *pdev;
 355         struct device_node *np;
 356
 357         np = of_get_compatible_child(dev->of_node, compatible);
 358         if (!np)
 359                 return NULL;
 360
 361         pdev = of_find_device_by_node(np);
 362         of_node_put(np);
 363         if (!pdev)
 364                 return NULL;
 365
 366         return &pdev->dev;
 367 }
 368
 369 static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 370 {
 371         struct dwc3_meson_g12a  *priv;
 372         struct device           *dev = &pdev->dev;
 373         struct device_node      *np = dev->of_node;
 374         void __iomem *base;
 375         struct resource *res;
 376         enum phy_mode otg_id;
 377         int ret, i;
 378
 379         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 380         if (!priv)
 381                 return -ENOMEM;
 382
 383         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 384         base = devm_ioremap_resource(dev, res);
 385         if (IS_ERR(base))
 386                 return PTR_ERR(base);
 387
 388         priv->regmap = devm_regmap_init_mmio(dev, base,
 389                                              &phy_meson_g12a_usb3_regmap_conf);
 390         if (IS_ERR(priv->regmap))
 391                 return PTR_ERR(priv->regmap);
 392
 393         priv->vbus = devm_regulator_get_optional(dev, "vbus");
 394         if (IS_ERR(priv->vbus)) {
 395                 if (PTR_ERR(priv->vbus) == -EPROBE_DEFER)
 396                         return PTR_ERR(priv->vbus);
 397                 priv->vbus = NULL;
 398         }
 399
 400         priv->clk = devm_clk_get(dev, NULL);
 401         if (IS_ERR(priv->clk))
 402                 return PTR_ERR(priv->clk);
 403
 404         ret = clk_prepare_enable(priv->clk);
 405         if (ret)
 406                 return ret;
 407
 408         devm_add_action_or_reset(dev,
 409                                  (void(*)(void *))clk_disable_unprepare,
 410                                  priv->clk);
 411
 412         platform_set_drvdata(pdev, priv);
 413         priv->dev = dev;
 414
 415         priv->reset = devm_reset_control_get(dev, NULL);
 416         if (IS_ERR(priv->reset)) {
 417                 ret = PTR_ERR(priv->reset);
 418                 dev_err(dev, "failed to get device reset, err=%d\n", ret);
 419                 return ret;
 420         }
 421
 422         ret = reset_control_reset(priv->reset);
 423         if (ret)
 424                 return ret;
 425
 426         ret = dwc3_meson_g12a_get_phys(priv);
 427         if (ret)
 428                 return ret;
 429
 430         if (priv->vbus) {
 431                 ret = regulator_enable(priv->vbus);
 432                 if (ret)
 433                         return ret;
 434         }
 435
 436         /* Get dr_mode */
 437         priv->otg_mode = usb_get_dr_mode(dev);
 438
 439         dwc3_meson_g12a_usb_init(priv);
 440
 441         /* Init PHYs */
 442         for (i = 0 ; i < PHY_COUNT ; ++i) {
 443                 ret = phy_init(priv->phys[i]);
 444                 if (ret)
 445                         return ret;
 446         }
 447
 448         /* Set PHY Power */
 449         for (i = 0 ; i < PHY_COUNT ; ++i) {
 450                 ret = phy_power_on(priv->phys[i]);
 451                 if (ret)
 452                         goto err_phys_exit;
 453         }
 454
 455         ret = of_platform_populate(np, NULL, NULL, dev);
 456         if (ret) {
 457                 clk_disable_unprepare(priv->clk);
 458                 goto err_phys_power;
 459         }
 460
 461         /* Setup OTG mode corresponding to the ID pin */
 462         if (priv->otg_mode == USB_DR_MODE_OTG) {
 463                 /* TOFIX Handle ID mode toggling via IRQ */
 464                 otg_id = dwc3_meson_g12a_get_id(priv);
 465                 if (otg_id != priv->otg_phy_mode) {
 466                         if (dwc3_meson_g12a_otg_mode_set(priv, otg_id))
 467                                 dev_warn(dev, "Failed to switch OTG mode\n");
 468                 }
 469         }
 470
 471         /* Setup role switcher */
 472         priv->switch_desc.usb2_port = dwc3_meson_g12_find_child(dev,
 473                                                                 "snps,dwc3");
 474         priv->switch_desc.udc = dwc3_meson_g12_find_child(dev, "snps,dwc2");
 475         priv->switch_desc.allow_userspace_control = true;
 476         priv->switch_desc.set = dwc3_meson_g12a_role_set;
 477         priv->switch_desc.get = dwc3_meson_g12a_role_get;
 478
 479         priv->role_switch = usb_role_switch_register(dev, &priv->switch_desc);
 480         if (IS_ERR(priv->role_switch))
 481                 dev_warn(dev, "Unable to register Role Switch\n");
 482
 483         pm_runtime_set_active(dev);
 484         pm_runtime_enable(dev);
 485         pm_runtime_get_sync(dev);
 486
 487         return 0;
 488
 489 err_phys_power:
 490         for (i = 0 ; i < PHY_COUNT ; ++i)
 491                 phy_power_off(priv->phys[i]);
 492
 493 err_phys_exit:
 494         for (i = 0 ; i < PHY_COUNT ; ++i)
 495                 phy_exit(priv->phys[i]);
 496
 497         return ret;
 498 }
 499
 500 static int dwc3_meson_g12a_remove(struct platform_device *pdev)
 501 {
 502         struct dwc3_meson_g12a *priv = platform_get_drvdata(pdev);
 503         struct device *dev = &pdev->dev;
 504         int i;
 505
 506         usb_role_switch_unregister(priv->role_switch);
 507
 508         of_platform_depopulate(dev);
 509
 510         for (i = 0 ; i < PHY_COUNT ; ++i) {
 511                 phy_power_off(priv->phys[i]);
 512                 phy_exit(priv->phys[i]);
 513         }
 514
 515         pm_runtime_disable(dev);
 516         pm_runtime_put_noidle(dev);
 517         pm_runtime_set_suspended(dev);
 518
 519         return 0;
 520 }
 521
 522 static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev)
 523 {
 524         struct dwc3_meson_g12a  *priv = dev_get_drvdata(dev);
 525
 526         clk_disable(priv->clk);
 527
 528         return 0;
 529 }
 530
 531 static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev)
 532 {
 533         struct dwc3_meson_g12a  *priv = dev_get_drvdata(dev);
 534
 535         return clk_enable(priv->clk);
 536 }
 537
 538 static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev)
 539 {
 540         struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
 541         int i;
 542
 543         for (i = 0 ; i < PHY_COUNT ; ++i) {
 544                 phy_power_off(priv->phys[i]);
 545                 phy_exit(priv->phys[i]);
 546         }
 547
 548         reset_control_assert(priv->reset);
 549
 550         return 0;
 551 }
 552
 553 static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev)
 554 {
 555         struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
 556         int i, ret;
 557
 558         reset_control_deassert(priv->reset);
 559
 560         dwc3_meson_g12a_usb_init(priv);
 561
 562         /* Init PHYs */
 563         for (i = 0 ; i < PHY_COUNT ; ++i) {
 564                 ret = phy_init(priv->phys[i]);
 565                 if (ret)
 566                         return ret;
 567         }
 568
 569         /* Set PHY Power */
 570         for (i = 0 ; i < PHY_COUNT ; ++i) {
 571                 ret = phy_power_on(priv->phys[i]);
 572                 if (ret)
 573                         return ret;
 574         }
 575
 576         return 0;
 577 }
 578
 579 static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = {
 580         SET_SYSTEM_SLEEP_PM_OPS(dwc3_meson_g12a_suspend, dwc3_meson_g12a_resume)
 581         SET_RUNTIME_PM_OPS(dwc3_meson_g12a_runtime_suspend,
 582                            dwc3_meson_g12a_runtime_resume, NULL)
 583 };
 584
 585 static const struct of_device_id dwc3_meson_g12a_match[] = {
 586         { .compatible = "amlogic,meson-g12a-usb-ctrl" },
 587         { /* Sentinel */ }
 588 };
 589 MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match);
 590
 591 static struct platform_driver dwc3_meson_g12a_driver = {
 592         .probe          = dwc3_meson_g12a_probe,
 593         .remove         = dwc3_meson_g12a_remove,
 594         .driver         = {
 595                 .name   = "dwc3-meson-g12a",
 596                 .of_match_table = dwc3_meson_g12a_match,
 597                 .pm     = &dwc3_meson_g12a_dev_pm_ops,
 598         },
 599 };
 600
 601 module_platform_driver(dwc3_meson_g12a_driver);
 602 MODULE_LICENSE("GPL v2");
 603 MODULE_DESCRIPTION("Amlogic Meson G12A USB Glue Layer");
 604 MODULE_AUTHOR("Neil Armstrong <[email protected]>");