drivers/gpu/drm/bridge/sii902x.c

   1 /*
   2  * Copyright (C) 2018 Renesas Electronics
   3  *
   4  * Copyright (C) 2016 Atmel
   5  *                    Bo Shen <voice.shen@atmel.com>
   6  *
   7  * Authors:           Bo Shen <voice.shen@atmel.com>
   8  *                    Boris Brezillon <boris.brezillon@free-electrons.com>
   9  *                    Wu, Songjun <Songjun.Wu@atmel.com>
  10  *
  11  *
  12  * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  */
  24
  25 #include <linux/gpio/consumer.h>
  26 #include <linux/i2c-mux.h>
  27 #include <linux/i2c.h>
  28 #include <linux/module.h>
  29 #include <linux/regmap.h>
  30
  31 #include <drm/drmP.h>
  32 #include <drm/drm_atomic_helper.h>
  33 #include <drm/drm_edid.h>
  34 #include <drm/drm_probe_helper.h>
  35
  36 #define SII902X_TPI_VIDEO_DATA                  0x0
  37
  38 #define SII902X_TPI_PIXEL_REPETITION            0x8
  39 #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT     BIT(5)
  40 #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE   BIT(4)
  41 #define SII902X_TPI_AVI_PIXEL_REP_4X            3
  42 #define SII902X_TPI_AVI_PIXEL_REP_2X            1
  43 #define SII902X_TPI_AVI_PIXEL_REP_NONE          0
  44 #define SII902X_TPI_CLK_RATIO_HALF              (0 << 6)
  45 #define SII902X_TPI_CLK_RATIO_1X                (1 << 6)
  46 #define SII902X_TPI_CLK_RATIO_2X                (2 << 6)
  47 #define SII902X_TPI_CLK_RATIO_4X                (3 << 6)
  48
  49 #define SII902X_TPI_AVI_IN_FORMAT               0x9
  50 #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT     BIT(7)
  51 #define SII902X_TPI_AVI_INPUT_DITHER            BIT(6)
  52 #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED     (2 << 2)
  53 #define SII902X_TPI_AVI_INPUT_RANGE_FULL        (1 << 2)
  54 #define SII902X_TPI_AVI_INPUT_RANGE_AUTO        (0 << 2)
  55 #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK  (3 << 0)
  56 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
  57 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
  58 #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB    (0 << 0)
  59
  60 #define SII902X_TPI_AVI_INFOFRAME               0x0c
  61
  62 #define SII902X_SYS_CTRL_DATA                   0x1a
  63 #define SII902X_SYS_CTRL_PWR_DWN                BIT(4)
  64 #define SII902X_SYS_CTRL_AV_MUTE                BIT(3)
  65 #define SII902X_SYS_CTRL_DDC_BUS_REQ            BIT(2)
  66 #define SII902X_SYS_CTRL_DDC_BUS_GRTD           BIT(1)
  67 #define SII902X_SYS_CTRL_OUTPUT_MODE            BIT(0)
  68 #define SII902X_SYS_CTRL_OUTPUT_HDMI            1
  69 #define SII902X_SYS_CTRL_OUTPUT_DVI             0
  70
  71 #define SII902X_REG_CHIPID(n)                   (0x1b + (n))
  72
  73 #define SII902X_PWR_STATE_CTRL                  0x1e
  74 #define SII902X_AVI_POWER_STATE_MSK             GENMASK(1, 0)
  75 #define SII902X_AVI_POWER_STATE_D(l)            ((l) & SII902X_AVI_POWER_STATE_MSK)
  76
  77 #define SII902X_INT_ENABLE                      0x3c
  78 #define SII902X_INT_STATUS                      0x3d
  79 #define SII902X_HOTPLUG_EVENT                   BIT(0)
  80 #define SII902X_PLUGGED_STATUS                  BIT(2)
  81
  82 #define SII902X_REG_TPI_RQB                     0xc7
  83
  84 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS  500
  85
  86 struct sii902x {
  87         struct i2c_client *i2c;
  88         struct regmap *regmap;
  89         struct drm_bridge bridge;
  90         struct drm_connector connector;
  91         struct gpio_desc *reset_gpio;
  92         struct i2c_mux_core *i2cmux;
  93 };
  94
  95 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
  96 {
  97         union i2c_smbus_data data;
  98         int ret;
  99
 100         ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
 101                                I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
 102
 103         if (ret < 0)
 104                 return ret;
 105
 106         *val = data.byte;
 107         return 0;
 108 }
 109
 110 static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
 111 {
 112         union i2c_smbus_data data;
 113
 114         data.byte = val;
 115
 116         return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
 117                                 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
 118                                 &data);
 119 }
 120
 121 static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
 122                                         u8 val)
 123 {
 124         int ret;
 125         u8 status;
 126
 127         ret = sii902x_read_unlocked(i2c, reg, &status);
 128         if (ret)
 129                 return ret;
 130         status &= ~mask;
 131         status |= val & mask;
 132         return sii902x_write_unlocked(i2c, reg, status);
 133 }
 134
 135 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
 136 {
 137         return container_of(bridge, struct sii902x, bridge);
 138 }
 139
 140 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
 141 {
 142         return container_of(con, struct sii902x, connector);
 143 }
 144
 145 static void sii902x_reset(struct sii902x *sii902x)
 146 {
 147         if (!sii902x->reset_gpio)
 148                 return;
 149
 150         gpiod_set_value(sii902x->reset_gpio, 1);
 151
 152         /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
 153         usleep_range(150, 200);
 154
 155         gpiod_set_value(sii902x->reset_gpio, 0);
 156 }
 157
 158 static enum drm_connector_status
 159 sii902x_connector_detect(struct drm_connector *connector, bool force)
 160 {
 161         struct sii902x *sii902x = connector_to_sii902x(connector);
 162         unsigned int status;
 163
 164         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 165
 166         return (status & SII902X_PLUGGED_STATUS) ?
 167                connector_status_connected : connector_status_disconnected;
 168 }
 169
 170 static const struct drm_connector_funcs sii902x_connector_funcs = {
 171         .detect = sii902x_connector_detect,
 172         .fill_modes = drm_helper_probe_single_connector_modes,
 173         .destroy = drm_connector_cleanup,
 174         .reset = drm_atomic_helper_connector_reset,
 175         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 176         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 177 };
 178
 179 static int sii902x_get_modes(struct drm_connector *connector)
 180 {
 181         struct sii902x *sii902x = connector_to_sii902x(connector);
 182         u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 183         struct edid *edid;
 184         int num = 0, ret;
 185
 186         edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
 187         drm_connector_update_edid_property(connector, edid);
 188         if (edid) {
 189                 num = drm_add_edid_modes(connector, edid);
 190                 kfree(edid);
 191         }
 192
 193         ret = drm_display_info_set_bus_formats(&connector->display_info,
 194                                                &bus_format, 1);
 195         if (ret)
 196                 return ret;
 197
 198         return num;
 199 }
 200
 201 static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
 202                                                struct drm_display_mode *mode)
 203 {
 204         /* TODO: check mode */
 205
 206         return MODE_OK;
 207 }
 208
 209 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
 210         .get_modes = sii902x_get_modes,
 211         .mode_valid = sii902x_mode_valid,
 212 };
 213
 214 static void sii902x_bridge_disable(struct drm_bridge *bridge)
 215 {
 216         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 217
 218         regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 219                            SII902X_SYS_CTRL_PWR_DWN,
 220                            SII902X_SYS_CTRL_PWR_DWN);
 221 }
 222
 223 static void sii902x_bridge_enable(struct drm_bridge *bridge)
 224 {
 225         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 226
 227         regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
 228                            SII902X_AVI_POWER_STATE_MSK,
 229                            SII902X_AVI_POWER_STATE_D(0));
 230         regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 231                            SII902X_SYS_CTRL_PWR_DWN, 0);
 232 }
 233
 234 static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
 235                                     const struct drm_display_mode *mode,
 236                                     const struct drm_display_mode *adj)
 237 {
 238         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 239         struct regmap *regmap = sii902x->regmap;
 240         u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
 241         struct hdmi_avi_infoframe frame;
 242         int ret;
 243
 244         buf[0] = adj->clock;
 245         buf[1] = adj->clock >> 8;
 246         buf[2] = adj->vrefresh;
 247         buf[3] = 0x00;
 248         buf[4] = adj->hdisplay;
 249         buf[5] = adj->hdisplay >> 8;
 250         buf[6] = adj->vdisplay;
 251         buf[7] = adj->vdisplay >> 8;
 252         buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
 253                  SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
 254         buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
 255                  SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
 256
 257         ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
 258         if (ret)
 259                 return;
 260
 261         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
 262                                                        &sii902x->connector, adj);
 263         if (ret < 0) {
 264                 DRM_ERROR("couldn't fill AVI infoframe\n");
 265                 return;
 266         }
 267
 268         ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
 269         if (ret < 0) {
 270                 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
 271                 return;
 272         }
 273
 274         /* Do not send the infoframe header, but keep the CRC field. */
 275         regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
 276                           buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
 277                           HDMI_AVI_INFOFRAME_SIZE + 1);
 278 }
 279
 280 static int sii902x_bridge_attach(struct drm_bridge *bridge)
 281 {
 282         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 283         struct drm_device *drm = bridge->dev;
 284         int ret;
 285
 286         drm_connector_helper_add(&sii902x->connector,
 287                                  &sii902x_connector_helper_funcs);
 288
 289         if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
 290                 dev_err(&sii902x->i2c->dev,
 291                         "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
 292                 return -ENOTSUPP;
 293         }
 294
 295         ret = drm_connector_init(drm, &sii902x->connector,
 296                                  &sii902x_connector_funcs,
 297                                  DRM_MODE_CONNECTOR_HDMIA);
 298         if (ret)
 299                 return ret;
 300
 301         if (sii902x->i2c->irq > 0)
 302                 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
 303         else
 304                 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
 305
 306         drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
 307
 308         return 0;
 309 }
 310
 311 static const struct drm_bridge_funcs sii902x_bridge_funcs = {
 312         .attach = sii902x_bridge_attach,
 313         .mode_set = sii902x_bridge_mode_set,
 314         .disable = sii902x_bridge_disable,
 315         .enable = sii902x_bridge_enable,
 316 };
 317
 318 static const struct regmap_range sii902x_volatile_ranges[] = {
 319         { .range_min = 0, .range_max = 0xff },
 320 };
 321
 322 static const struct regmap_access_table sii902x_volatile_table = {
 323         .yes_ranges = sii902x_volatile_ranges,
 324         .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
 325 };
 326
 327 static const struct regmap_config sii902x_regmap_config = {
 328         .reg_bits = 8,
 329         .val_bits = 8,
 330         .volatile_table = &sii902x_volatile_table,
 331         .cache_type = REGCACHE_NONE,
 332 };
 333
 334 static irqreturn_t sii902x_interrupt(int irq, void *data)
 335 {
 336         struct sii902x *sii902x = data;
 337         unsigned int status = 0;
 338
 339         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 340         regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
 341
 342         if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
 343                 drm_helper_hpd_irq_event(sii902x->bridge.dev);
 344
 345         return IRQ_HANDLED;
 346 }
 347
 348 /*
 349  * The purpose of sii902x_i2c_bypass_select is to enable the pass through
 350  * mode of the HDMI transmitter. Do not use regmap from within this function,
 351  * only use sii902x_*_unlocked functions to read/modify/write registers.
 352  * We are holding the parent adapter lock here, keep this in mind before
 353  * adding more i2c transactions.
 354  *
 355  * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
 356  * in this driver, we need to make sure that we only touch 0x1A[2:1] from
 357  * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
 358  * we leave the remaining bits as we have found them.
 359  */
 360 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
 361 {
 362         struct sii902x *sii902x = i2c_mux_priv(mux);
 363         struct device *dev = &sii902x->i2c->dev;
 364         unsigned long timeout;
 365         u8 status;
 366         int ret;
 367
 368         ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 369                                            SII902X_SYS_CTRL_DDC_BUS_REQ,
 370                                            SII902X_SYS_CTRL_DDC_BUS_REQ);
 371         if (ret)
 372                 return ret;
 373
 374         timeout = jiffies +
 375                   msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
 376         do {
 377                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 378                                             &status);
 379                 if (ret)
 380                         return ret;
 381         } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
 382                  time_before(jiffies, timeout));
 383
 384         if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
 385                 dev_err(dev, "Failed to acquire the i2c bus\n");
 386                 return -ETIMEDOUT;
 387         }
 388
 389         return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 390                                       status);
 391 }
 392
 393 /*
 394  * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
 395  * mode of the HDMI transmitter. Do not use regmap from within this function,
 396  * only use sii902x_*_unlocked functions to read/modify/write registers.
 397  * We are holding the parent adapter lock here, keep this in mind before
 398  * adding more i2c transactions.
 399  *
 400  * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
 401  * in this driver, we need to make sure that we only touch 0x1A[2:1] from
 402  * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
 403  * we leave the remaining bits as we have found them.
 404  */
 405 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
 406 {
 407         struct sii902x *sii902x = i2c_mux_priv(mux);
 408         struct device *dev = &sii902x->i2c->dev;
 409         unsigned long timeout;
 410         unsigned int retries;
 411         u8 status;
 412         int ret;
 413
 414         /*
 415          * When the HDMI transmitter is in pass through mode, we need an
 416          * (undocumented) additional delay between STOP and START conditions
 417          * to guarantee the bus won't get stuck.
 418          */
 419         udelay(30);
 420
 421         /*
 422          * Sometimes the I2C bus can stall after failure to use the
 423          * EDID channel. Retry a few times to see if things clear
 424          * up, else continue anyway.
 425          */
 426         retries = 5;
 427         do {
 428                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 429                                             &status);
 430                 retries--;
 431         } while (ret && retries);
 432         if (ret) {
 433                 dev_err(dev, "failed to read status (%d)\n", ret);
 434                 return ret;
 435         }
 436
 437         ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 438                                            SII902X_SYS_CTRL_DDC_BUS_REQ |
 439                                            SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
 440         if (ret)
 441                 return ret;
 442
 443         timeout = jiffies +
 444                   msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
 445         do {
 446                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 447                                             &status);
 448                 if (ret)
 449                         return ret;
 450         } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
 451                            SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
 452                  time_before(jiffies, timeout));
 453
 454         if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
 455                       SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
 456                 dev_err(dev, "failed to release the i2c bus\n");
 457                 return -ETIMEDOUT;
 458         }
 459
 460         return 0;
 461 }
 462
 463 static int sii902x_probe(struct i2c_client *client,
 464                          const struct i2c_device_id *id)
 465 {
 466         struct device *dev = &client->dev;
 467         unsigned int status = 0;
 468         struct sii902x *sii902x;
 469         u8 chipid[4];
 470         int ret;
 471
 472         ret = i2c_check_functionality(client->adapter,
 473                                       I2C_FUNC_SMBUS_BYTE_DATA);
 474         if (!ret) {
 475                 dev_err(dev, "I2C adapter not suitable\n");
 476                 return -EIO;
 477         }
 478
 479         sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
 480         if (!sii902x)
 481                 return -ENOMEM;
 482
 483         sii902x->i2c = client;
 484         sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
 485         if (IS_ERR(sii902x->regmap))
 486                 return PTR_ERR(sii902x->regmap);
 487
 488         sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
 489                                                       GPIOD_OUT_LOW);
 490         if (IS_ERR(sii902x->reset_gpio)) {
 491                 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
 492                         PTR_ERR(sii902x->reset_gpio));
 493                 return PTR_ERR(sii902x->reset_gpio);
 494         }
 495
 496         sii902x_reset(sii902x);
 497
 498         ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
 499         if (ret)
 500                 return ret;
 501
 502         ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
 503                                &chipid, 4);
 504         if (ret) {
 505                 dev_err(dev, "regmap_read failed %d\n", ret);
 506                 return ret;
 507         }
 508
 509         if (chipid[0] != 0xb0) {
 510                 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
 511                         chipid[0]);
 512                 return -EINVAL;
 513         }
 514
 515         /* Clear all pending interrupts */
 516         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 517         regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
 518
 519         if (client->irq > 0) {
 520                 regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
 521                              SII902X_HOTPLUG_EVENT);
 522
 523                 ret = devm_request_threaded_irq(dev, client->irq, NULL,
 524                                                 sii902x_interrupt,
 525                                                 IRQF_ONESHOT, dev_name(dev),
 526                                                 sii902x);
 527                 if (ret)
 528                         return ret;
 529         }
 530
 531         sii902x->bridge.funcs = &sii902x_bridge_funcs;
 532         sii902x->bridge.of_node = dev->of_node;
 533         drm_bridge_add(&sii902x->bridge);
 534
 535         i2c_set_clientdata(client, sii902x);
 536
 537         sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
 538                                         1, 0, I2C_MUX_GATE,
 539                                         sii902x_i2c_bypass_select,
 540                                         sii902x_i2c_bypass_deselect);
 541         if (!sii902x->i2cmux)
 542                 return -ENOMEM;
 543
 544         sii902x->i2cmux->priv = sii902x;
 545         return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
 546 }
 547
 548 static int sii902x_remove(struct i2c_client *client)
 549
 550 {
 551         struct sii902x *sii902x = i2c_get_clientdata(client);
 552
 553         i2c_mux_del_adapters(sii902x->i2cmux);
 554         drm_bridge_remove(&sii902x->bridge);
 555
 556         return 0;
 557 }
 558
 559 static const struct of_device_id sii902x_dt_ids[] = {
 560         { .compatible = "sil,sii9022", },
 561         { }
 562 };
 563 MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
 564
 565 static const struct i2c_device_id sii902x_i2c_ids[] = {
 566         { "sii9022", 0 },
 567         { },
 568 };
 569 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
 570
 571 static struct i2c_driver sii902x_driver = {
 572         .probe = sii902x_probe,
 573         .remove = sii902x_remove,
 574         .driver = {
 575                 .name = "sii902x",
 576                 .of_match_table = sii902x_dt_ids,
 577         },
 578         .id_table = sii902x_i2c_ids,
 579 };
 580 module_i2c_driver(sii902x_driver);
 581
 582 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
 583 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
 584 MODULE_LICENSE("GPL");