drivers/gpu/drm/bridge/sii902x.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2018 Renesas Electronics
   4  *
   5  * Copyright (C) 2016 Atmel
   6  *                    Bo Shen <voice.shen@atmel.com>
   7  *
   8  * Authors:           Bo Shen <voice.shen@atmel.com>
   9  *                    Boris Brezillon <boris.brezillon@free-electrons.com>
  10  *                    Wu, Songjun <Songjun.Wu@atmel.com>
  11  *
  12  * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
  13  */
  14
  15 #include <linux/gpio/consumer.h>
  16 #include <linux/i2c-mux.h>
  17 #include <linux/i2c.h>
  18 #include <linux/module.h>
  19 #include <linux/regmap.h>
  20
  21 #include <drm/drmP.h>
  22 #include <drm/drm_atomic_helper.h>
  23 #include <drm/drm_edid.h>
  24 #include <drm/drm_probe_helper.h>
  25
  26 #define SII902X_TPI_VIDEO_DATA                  0x0
  27
  28 #define SII902X_TPI_PIXEL_REPETITION            0x8
  29 #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT     BIT(5)
  30 #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE   BIT(4)
  31 #define SII902X_TPI_AVI_PIXEL_REP_4X            3
  32 #define SII902X_TPI_AVI_PIXEL_REP_2X            1
  33 #define SII902X_TPI_AVI_PIXEL_REP_NONE          0
  34 #define SII902X_TPI_CLK_RATIO_HALF              (0 << 6)
  35 #define SII902X_TPI_CLK_RATIO_1X                (1 << 6)
  36 #define SII902X_TPI_CLK_RATIO_2X                (2 << 6)
  37 #define SII902X_TPI_CLK_RATIO_4X                (3 << 6)
  38
  39 #define SII902X_TPI_AVI_IN_FORMAT               0x9
  40 #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT     BIT(7)
  41 #define SII902X_TPI_AVI_INPUT_DITHER            BIT(6)
  42 #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED     (2 << 2)
  43 #define SII902X_TPI_AVI_INPUT_RANGE_FULL        (1 << 2)
  44 #define SII902X_TPI_AVI_INPUT_RANGE_AUTO        (0 << 2)
  45 #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK  (3 << 0)
  46 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
  47 #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
  48 #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB    (0 << 0)
  49
  50 #define SII902X_TPI_AVI_INFOFRAME               0x0c
  51
  52 #define SII902X_SYS_CTRL_DATA                   0x1a
  53 #define SII902X_SYS_CTRL_PWR_DWN                BIT(4)
  54 #define SII902X_SYS_CTRL_AV_MUTE                BIT(3)
  55 #define SII902X_SYS_CTRL_DDC_BUS_REQ            BIT(2)
  56 #define SII902X_SYS_CTRL_DDC_BUS_GRTD           BIT(1)
  57 #define SII902X_SYS_CTRL_OUTPUT_MODE            BIT(0)
  58 #define SII902X_SYS_CTRL_OUTPUT_HDMI            1
  59 #define SII902X_SYS_CTRL_OUTPUT_DVI             0
  60
  61 #define SII902X_REG_CHIPID(n)                   (0x1b + (n))
  62
  63 #define SII902X_PWR_STATE_CTRL                  0x1e
  64 #define SII902X_AVI_POWER_STATE_MSK             GENMASK(1, 0)
  65 #define SII902X_AVI_POWER_STATE_D(l)            ((l) & SII902X_AVI_POWER_STATE_MSK)
  66
  67 #define SII902X_INT_ENABLE                      0x3c
  68 #define SII902X_INT_STATUS                      0x3d
  69 #define SII902X_HOTPLUG_EVENT                   BIT(0)
  70 #define SII902X_PLUGGED_STATUS                  BIT(2)
  71
  72 #define SII902X_REG_TPI_RQB                     0xc7
  73
  74 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS  500
  75
  76 struct sii902x {
  77         struct i2c_client *i2c;
  78         struct regmap *regmap;
  79         struct drm_bridge bridge;
  80         struct drm_connector connector;
  81         struct gpio_desc *reset_gpio;
  82         struct i2c_mux_core *i2cmux;
  83 };
  84
  85 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
  86 {
  87         union i2c_smbus_data data;
  88         int ret;
  89
  90         ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
  91                                I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
  92
  93         if (ret < 0)
  94                 return ret;
  95
  96         *val = data.byte;
  97         return 0;
  98 }
  99
 100 static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
 101 {
 102         union i2c_smbus_data data;
 103
 104         data.byte = val;
 105
 106         return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
 107                                 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
 108                                 &data);
 109 }
 110
 111 static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
 112                                         u8 val)
 113 {
 114         int ret;
 115         u8 status;
 116
 117         ret = sii902x_read_unlocked(i2c, reg, &status);
 118         if (ret)
 119                 return ret;
 120         status &= ~mask;
 121         status |= val & mask;
 122         return sii902x_write_unlocked(i2c, reg, status);
 123 }
 124
 125 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
 126 {
 127         return container_of(bridge, struct sii902x, bridge);
 128 }
 129
 130 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
 131 {
 132         return container_of(con, struct sii902x, connector);
 133 }
 134
 135 static void sii902x_reset(struct sii902x *sii902x)
 136 {
 137         if (!sii902x->reset_gpio)
 138                 return;
 139
 140         gpiod_set_value(sii902x->reset_gpio, 1);
 141
 142         /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
 143         usleep_range(150, 200);
 144
 145         gpiod_set_value(sii902x->reset_gpio, 0);
 146 }
 147
 148 static enum drm_connector_status
 149 sii902x_connector_detect(struct drm_connector *connector, bool force)
 150 {
 151         struct sii902x *sii902x = connector_to_sii902x(connector);
 152         unsigned int status;
 153
 154         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 155
 156         return (status & SII902X_PLUGGED_STATUS) ?
 157                connector_status_connected : connector_status_disconnected;
 158 }
 159
 160 static const struct drm_connector_funcs sii902x_connector_funcs = {
 161         .detect = sii902x_connector_detect,
 162         .fill_modes = drm_helper_probe_single_connector_modes,
 163         .destroy = drm_connector_cleanup,
 164         .reset = drm_atomic_helper_connector_reset,
 165         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 166         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 167 };
 168
 169 static int sii902x_get_modes(struct drm_connector *connector)
 170 {
 171         struct sii902x *sii902x = connector_to_sii902x(connector);
 172         u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 173         struct edid *edid;
 174         int num = 0, ret;
 175
 176         edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
 177         drm_connector_update_edid_property(connector, edid);
 178         if (edid) {
 179                 num = drm_add_edid_modes(connector, edid);
 180                 kfree(edid);
 181         }
 182
 183         ret = drm_display_info_set_bus_formats(&connector->display_info,
 184                                                &bus_format, 1);
 185         if (ret)
 186                 return ret;
 187
 188         return num;
 189 }
 190
 191 static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
 192                                                struct drm_display_mode *mode)
 193 {
 194         /* TODO: check mode */
 195
 196         return MODE_OK;
 197 }
 198
 199 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
 200         .get_modes = sii902x_get_modes,
 201         .mode_valid = sii902x_mode_valid,
 202 };
 203
 204 static void sii902x_bridge_disable(struct drm_bridge *bridge)
 205 {
 206         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 207
 208         regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 209                            SII902X_SYS_CTRL_PWR_DWN,
 210                            SII902X_SYS_CTRL_PWR_DWN);
 211 }
 212
 213 static void sii902x_bridge_enable(struct drm_bridge *bridge)
 214 {
 215         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 216
 217         regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
 218                            SII902X_AVI_POWER_STATE_MSK,
 219                            SII902X_AVI_POWER_STATE_D(0));
 220         regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
 221                            SII902X_SYS_CTRL_PWR_DWN, 0);
 222 }
 223
 224 static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
 225                                     const struct drm_display_mode *mode,
 226                                     const struct drm_display_mode *adj)
 227 {
 228         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 229         struct regmap *regmap = sii902x->regmap;
 230         u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
 231         struct hdmi_avi_infoframe frame;
 232         int ret;
 233
 234         buf[0] = adj->clock;
 235         buf[1] = adj->clock >> 8;
 236         buf[2] = adj->vrefresh;
 237         buf[3] = 0x00;
 238         buf[4] = adj->hdisplay;
 239         buf[5] = adj->hdisplay >> 8;
 240         buf[6] = adj->vdisplay;
 241         buf[7] = adj->vdisplay >> 8;
 242         buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
 243                  SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
 244         buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
 245                  SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
 246
 247         ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
 248         if (ret)
 249                 return;
 250
 251         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
 252                                                        &sii902x->connector, adj);
 253         if (ret < 0) {
 254                 DRM_ERROR("couldn't fill AVI infoframe\n");
 255                 return;
 256         }
 257
 258         ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
 259         if (ret < 0) {
 260                 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
 261                 return;
 262         }
 263
 264         /* Do not send the infoframe header, but keep the CRC field. */
 265         regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
 266                           buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
 267                           HDMI_AVI_INFOFRAME_SIZE + 1);
 268 }
 269
 270 static int sii902x_bridge_attach(struct drm_bridge *bridge)
 271 {
 272         struct sii902x *sii902x = bridge_to_sii902x(bridge);
 273         struct drm_device *drm = bridge->dev;
 274         int ret;
 275
 276         drm_connector_helper_add(&sii902x->connector,
 277                                  &sii902x_connector_helper_funcs);
 278
 279         if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
 280                 dev_err(&sii902x->i2c->dev,
 281                         "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
 282                 return -ENOTSUPP;
 283         }
 284
 285         ret = drm_connector_init(drm, &sii902x->connector,
 286                                  &sii902x_connector_funcs,
 287                                  DRM_MODE_CONNECTOR_HDMIA);
 288         if (ret)
 289                 return ret;
 290
 291         if (sii902x->i2c->irq > 0)
 292                 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
 293         else
 294                 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
 295
 296         drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
 297
 298         return 0;
 299 }
 300
 301 static const struct drm_bridge_funcs sii902x_bridge_funcs = {
 302         .attach = sii902x_bridge_attach,
 303         .mode_set = sii902x_bridge_mode_set,
 304         .disable = sii902x_bridge_disable,
 305         .enable = sii902x_bridge_enable,
 306 };
 307
 308 static const struct regmap_range sii902x_volatile_ranges[] = {
 309         { .range_min = 0, .range_max = 0xff },
 310 };
 311
 312 static const struct regmap_access_table sii902x_volatile_table = {
 313         .yes_ranges = sii902x_volatile_ranges,
 314         .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
 315 };
 316
 317 static const struct regmap_config sii902x_regmap_config = {
 318         .reg_bits = 8,
 319         .val_bits = 8,
 320         .volatile_table = &sii902x_volatile_table,
 321         .cache_type = REGCACHE_NONE,
 322 };
 323
 324 static irqreturn_t sii902x_interrupt(int irq, void *data)
 325 {
 326         struct sii902x *sii902x = data;
 327         unsigned int status = 0;
 328
 329         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 330         regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
 331
 332         if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
 333                 drm_helper_hpd_irq_event(sii902x->bridge.dev);
 334
 335         return IRQ_HANDLED;
 336 }
 337
 338 /*
 339  * The purpose of sii902x_i2c_bypass_select is to enable the pass through
 340  * mode of the HDMI transmitter. Do not use regmap from within this function,
 341  * only use sii902x_*_unlocked functions to read/modify/write registers.
 342  * We are holding the parent adapter lock here, keep this in mind before
 343  * adding more i2c transactions.
 344  *
 345  * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
 346  * in this driver, we need to make sure that we only touch 0x1A[2:1] from
 347  * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
 348  * we leave the remaining bits as we have found them.
 349  */
 350 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
 351 {
 352         struct sii902x *sii902x = i2c_mux_priv(mux);
 353         struct device *dev = &sii902x->i2c->dev;
 354         unsigned long timeout;
 355         u8 status;
 356         int ret;
 357
 358         ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 359                                            SII902X_SYS_CTRL_DDC_BUS_REQ,
 360                                            SII902X_SYS_CTRL_DDC_BUS_REQ);
 361         if (ret)
 362                 return ret;
 363
 364         timeout = jiffies +
 365                   msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
 366         do {
 367                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 368                                             &status);
 369                 if (ret)
 370                         return ret;
 371         } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
 372                  time_before(jiffies, timeout));
 373
 374         if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
 375                 dev_err(dev, "Failed to acquire the i2c bus\n");
 376                 return -ETIMEDOUT;
 377         }
 378
 379         return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 380                                       status);
 381 }
 382
 383 /*
 384  * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
 385  * mode of the HDMI transmitter. Do not use regmap from within this function,
 386  * only use sii902x_*_unlocked functions to read/modify/write registers.
 387  * We are holding the parent adapter lock here, keep this in mind before
 388  * adding more i2c transactions.
 389  *
 390  * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
 391  * in this driver, we need to make sure that we only touch 0x1A[2:1] from
 392  * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
 393  * we leave the remaining bits as we have found them.
 394  */
 395 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
 396 {
 397         struct sii902x *sii902x = i2c_mux_priv(mux);
 398         struct device *dev = &sii902x->i2c->dev;
 399         unsigned long timeout;
 400         unsigned int retries;
 401         u8 status;
 402         int ret;
 403
 404         /*
 405          * When the HDMI transmitter is in pass through mode, we need an
 406          * (undocumented) additional delay between STOP and START conditions
 407          * to guarantee the bus won't get stuck.
 408          */
 409         udelay(30);
 410
 411         /*
 412          * Sometimes the I2C bus can stall after failure to use the
 413          * EDID channel. Retry a few times to see if things clear
 414          * up, else continue anyway.
 415          */
 416         retries = 5;
 417         do {
 418                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 419                                             &status);
 420                 retries--;
 421         } while (ret && retries);
 422         if (ret) {
 423                 dev_err(dev, "failed to read status (%d)\n", ret);
 424                 return ret;
 425         }
 426
 427         ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 428                                            SII902X_SYS_CTRL_DDC_BUS_REQ |
 429                                            SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
 430         if (ret)
 431                 return ret;
 432
 433         timeout = jiffies +
 434                   msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
 435         do {
 436                 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
 437                                             &status);
 438                 if (ret)
 439                         return ret;
 440         } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
 441                            SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
 442                  time_before(jiffies, timeout));
 443
 444         if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
 445                       SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
 446                 dev_err(dev, "failed to release the i2c bus\n");
 447                 return -ETIMEDOUT;
 448         }
 449
 450         return 0;
 451 }
 452
 453 static int sii902x_probe(struct i2c_client *client,
 454                          const struct i2c_device_id *id)
 455 {
 456         struct device *dev = &client->dev;
 457         unsigned int status = 0;
 458         struct sii902x *sii902x;
 459         u8 chipid[4];
 460         int ret;
 461
 462         ret = i2c_check_functionality(client->adapter,
 463                                       I2C_FUNC_SMBUS_BYTE_DATA);
 464         if (!ret) {
 465                 dev_err(dev, "I2C adapter not suitable\n");
 466                 return -EIO;
 467         }
 468
 469         sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
 470         if (!sii902x)
 471                 return -ENOMEM;
 472
 473         sii902x->i2c = client;
 474         sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
 475         if (IS_ERR(sii902x->regmap))
 476                 return PTR_ERR(sii902x->regmap);
 477
 478         sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
 479                                                       GPIOD_OUT_LOW);
 480         if (IS_ERR(sii902x->reset_gpio)) {
 481                 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
 482                         PTR_ERR(sii902x->reset_gpio));
 483                 return PTR_ERR(sii902x->reset_gpio);
 484         }
 485
 486         sii902x_reset(sii902x);
 487
 488         ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
 489         if (ret)
 490                 return ret;
 491
 492         ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
 493                                &chipid, 4);
 494         if (ret) {
 495                 dev_err(dev, "regmap_read failed %d\n", ret);
 496                 return ret;
 497         }
 498
 499         if (chipid[0] != 0xb0) {
 500                 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
 501                         chipid[0]);
 502                 return -EINVAL;
 503         }
 504
 505         /* Clear all pending interrupts */
 506         regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
 507         regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
 508
 509         if (client->irq > 0) {
 510                 regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
 511                              SII902X_HOTPLUG_EVENT);
 512
 513                 ret = devm_request_threaded_irq(dev, client->irq, NULL,
 514                                                 sii902x_interrupt,
 515                                                 IRQF_ONESHOT, dev_name(dev),
 516                                                 sii902x);
 517                 if (ret)
 518                         return ret;
 519         }
 520
 521         sii902x->bridge.funcs = &sii902x_bridge_funcs;
 522         sii902x->bridge.of_node = dev->of_node;
 523         drm_bridge_add(&sii902x->bridge);
 524
 525         i2c_set_clientdata(client, sii902x);
 526
 527         sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
 528                                         1, 0, I2C_MUX_GATE,
 529                                         sii902x_i2c_bypass_select,
 530                                         sii902x_i2c_bypass_deselect);
 531         if (!sii902x->i2cmux)
 532                 return -ENOMEM;
 533
 534         sii902x->i2cmux->priv = sii902x;
 535         return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
 536 }
 537
 538 static int sii902x_remove(struct i2c_client *client)
 539
 540 {
 541         struct sii902x *sii902x = i2c_get_clientdata(client);
 542
 543         i2c_mux_del_adapters(sii902x->i2cmux);
 544         drm_bridge_remove(&sii902x->bridge);
 545
 546         return 0;
 547 }
 548
 549 static const struct of_device_id sii902x_dt_ids[] = {
 550         { .compatible = "sil,sii9022", },
 551         { }
 552 };
 553 MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
 554
 555 static const struct i2c_device_id sii902x_i2c_ids[] = {
 556         { "sii9022", 0 },
 557         { },
 558 };
 559 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
 560
 561 static struct i2c_driver sii902x_driver = {
 562         .probe = sii902x_probe,
 563         .remove = sii902x_remove,
 564         .driver = {
 565                 .name = "sii902x",
 566                 .of_match_table = sii902x_dt_ids,
 567         },
 568         .id_table = sii902x_i2c_ids,
 569 };
 570 module_i2c_driver(sii902x_driver);
 571
 572 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
 573 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
 574 MODULE_LICENSE("GPL");