1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/device.h> 7 #include <linux/delay.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/i2c.h> 10 #include <linux/media-bus-format.h> 11 #include <linux/regmap.h> 12 13 #include <drm/drm_probe_helper.h> 14 #include <drm/drm_atomic_helper.h> 15 #include <drm/drm_edid.h> 16 #include <drm/drm_mipi_dsi.h> 17 #include <drm/drm_of.h> 18 19 #include <video/videomode.h> 20 21 #define I2C_MAIN 0 22 #define I2C_ADDR_MAIN 0x48 23 24 #define I2C_CEC_DSI 1 25 #define I2C_ADDR_CEC_DSI 0x49 26 27 #define I2C_MAX_IDX 2 28 29 struct lt8912 { 30 struct device *dev; 31 struct drm_bridge bridge; 32 struct drm_connector connector; 33 34 struct i2c_client *i2c_client[I2C_MAX_IDX]; 35 struct regmap *regmap[I2C_MAX_IDX]; 36 37 struct device_node *host_node; 38 struct drm_bridge *hdmi_port; 39 40 struct mipi_dsi_device *dsi; 41 42 struct gpio_desc *gp_reset; 43 44 struct videomode mode; 45 46 u8 data_lanes; 47 bool is_power_on; 48 bool is_attached; 49 }; 50 51 static int lt8912_write_init_config(struct lt8912 *lt) 52 { 53 const struct reg_sequence seq[] = { 54 /* Digital clock en*/ 55 {0x08, 0xff}, 56 {0x09, 0xff}, 57 {0x0a, 0xff}, 58 {0x0b, 0x7c}, 59 {0x0c, 0xff}, 60 {0x42, 0x04}, 61 62 /*Tx Analog*/ 63 {0x31, 0xb1}, 64 {0x32, 0xb1}, 65 {0x33, 0x0e}, 66 {0x37, 0x00}, 67 {0x38, 0x22}, 68 {0x60, 0x82}, 69 70 /*Cbus Analog*/ 71 {0x39, 0x45}, 72 {0x3a, 0x00}, 73 {0x3b, 0x00}, 74 75 /*HDMI Pll Analog*/ 76 {0x44, 0x31}, 77 {0x55, 0x44}, 78 {0x57, 0x01}, 79 {0x5a, 0x02}, 80 81 /*MIPI Analog*/ 82 {0x3e, 0xd6}, 83 {0x3f, 0xd4}, 84 {0x41, 0x3c}, 85 {0xB2, 0x00}, 86 }; 87 88 return regmap_multi_reg_write(lt->regmap[I2C_MAIN], seq, ARRAY_SIZE(seq)); 89 } 90 91 static int lt8912_write_mipi_basic_config(struct lt8912 *lt) 92 { 93 const struct reg_sequence seq[] = { 94 {0x12, 0x04}, 95 {0x14, 0x00}, 96 {0x15, 0x00}, 97 {0x1a, 0x03}, 98 {0x1b, 0x03}, 99 }; 100 101 return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq)); 102 }; 103 104 static int lt8912_write_dds_config(struct lt8912 *lt) 105 { 106 const struct reg_sequence seq[] = { 107 {0x4e, 0xff}, 108 {0x4f, 0x56}, 109 {0x50, 0x69}, 110 {0x51, 0x80}, 111 {0x1f, 0x5e}, 112 {0x20, 0x01}, 113 {0x21, 0x2c}, 114 {0x22, 0x01}, 115 {0x23, 0xfa}, 116 {0x24, 0x00}, 117 {0x25, 0xc8}, 118 {0x26, 0x00}, 119 {0x27, 0x5e}, 120 {0x28, 0x01}, 121 {0x29, 0x2c}, 122 {0x2a, 0x01}, 123 {0x2b, 0xfa}, 124 {0x2c, 0x00}, 125 {0x2d, 0xc8}, 126 {0x2e, 0x00}, 127 {0x42, 0x64}, 128 {0x43, 0x00}, 129 {0x44, 0x04}, 130 {0x45, 0x00}, 131 {0x46, 0x59}, 132 {0x47, 0x00}, 133 {0x48, 0xf2}, 134 {0x49, 0x06}, 135 {0x4a, 0x00}, 136 {0x4b, 0x72}, 137 {0x4c, 0x45}, 138 {0x4d, 0x00}, 139 {0x52, 0x08}, 140 {0x53, 0x00}, 141 {0x54, 0xb2}, 142 {0x55, 0x00}, 143 {0x56, 0xe4}, 144 {0x57, 0x0d}, 145 {0x58, 0x00}, 146 {0x59, 0xe4}, 147 {0x5a, 0x8a}, 148 {0x5b, 0x00}, 149 {0x5c, 0x34}, 150 {0x1e, 0x4f}, 151 {0x51, 0x00}, 152 }; 153 154 return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq)); 155 } 156 157 static int lt8912_write_rxlogicres_config(struct lt8912 *lt) 158 { 159 int ret; 160 161 ret = regmap_write(lt->regmap[I2C_MAIN], 0x03, 0x7f); 162 usleep_range(10000, 20000); 163 ret |= regmap_write(lt->regmap[I2C_MAIN], 0x03, 0xff); 164 165 return ret; 166 }; 167 168 static int lt8912_write_lvds_config(struct lt8912 *lt) 169 { 170 const struct reg_sequence seq[] = { 171 {0x44, 0x30}, 172 {0x51, 0x05}, 173 {0x50, 0x24}, 174 {0x51, 0x2d}, 175 {0x52, 0x04}, 176 {0x69, 0x0e}, 177 {0x69, 0x8e}, 178 {0x6a, 0x00}, 179 {0x6c, 0xb8}, 180 {0x6b, 0x51}, 181 {0x04, 0xfb}, 182 {0x04, 0xff}, 183 {0x7f, 0x00}, 184 {0xa8, 0x13}, 185 {0x02, 0xf7}, 186 {0x02, 0xff}, 187 {0x03, 0xcf}, 188 {0x03, 0xff}, 189 }; 190 191 return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq)); 192 }; 193 194 static inline struct lt8912 *bridge_to_lt8912(struct drm_bridge *b) 195 { 196 return container_of(b, struct lt8912, bridge); 197 } 198 199 static inline struct lt8912 *connector_to_lt8912(struct drm_connector *c) 200 { 201 return container_of(c, struct lt8912, connector); 202 } 203 204 static const struct regmap_config lt8912_regmap_config = { 205 .reg_bits = 8, 206 .val_bits = 8, 207 .max_register = 0xff, 208 }; 209 210 static int lt8912_init_i2c(struct lt8912 *lt, struct i2c_client *client) 211 { 212 unsigned int i; 213 /* 214 * At this time we only initialize 2 chips, but the lt8912 provides 215 * a third interface for the audio over HDMI configuration. 216 */ 217 struct i2c_board_info info[] = { 218 { I2C_BOARD_INFO("lt8912p0", I2C_ADDR_MAIN), }, 219 { I2C_BOARD_INFO("lt8912p1", I2C_ADDR_CEC_DSI), }, 220 }; 221 222 if (!lt) 223 return -ENODEV; 224 225 for (i = 0; i < ARRAY_SIZE(info); i++) { 226 if (i > 0) { 227 lt->i2c_client[i] = i2c_new_dummy_device(client->adapter, 228 info[i].addr); 229 if (IS_ERR(lt->i2c_client[i])) 230 return PTR_ERR(lt->i2c_client[i]); 231 } 232 233 lt->regmap[i] = devm_regmap_init_i2c(lt->i2c_client[i], 234 <8912_regmap_config); 235 if (IS_ERR(lt->regmap[i])) 236 return PTR_ERR(lt->regmap[i]); 237 } 238 return 0; 239 } 240 241 static int lt8912_free_i2c(struct lt8912 *lt) 242 { 243 unsigned int i; 244 245 for (i = 1; i < I2C_MAX_IDX; i++) 246 i2c_unregister_device(lt->i2c_client[i]); 247 248 return 0; 249 } 250 251 static int lt8912_hard_power_on(struct lt8912 *lt) 252 { 253 gpiod_set_value_cansleep(lt->gp_reset, 0); 254 msleep(20); 255 256 return 0; 257 } 258 259 static void lt8912_hard_power_off(struct lt8912 *lt) 260 { 261 gpiod_set_value_cansleep(lt->gp_reset, 1); 262 msleep(20); 263 lt->is_power_on = false; 264 } 265 266 static int lt8912_video_setup(struct lt8912 *lt) 267 { 268 u32 hactive, h_total, hpw, hfp, hbp; 269 u32 vactive, v_total, vpw, vfp, vbp; 270 u8 settle = 0x08; 271 int ret; 272 273 if (!lt) 274 return -EINVAL; 275 276 hactive = lt->mode.hactive; 277 hfp = lt->mode.hfront_porch; 278 hpw = lt->mode.hsync_len; 279 hbp = lt->mode.hback_porch; 280 h_total = hactive + hfp + hpw + hbp; 281 282 vactive = lt->mode.vactive; 283 vfp = lt->mode.vfront_porch; 284 vpw = lt->mode.vsync_len; 285 vbp = lt->mode.vback_porch; 286 v_total = vactive + vfp + vpw + vbp; 287 288 if (vactive <= 600) 289 settle = 0x04; 290 else if (vactive == 1080) 291 settle = 0x0a; 292 293 ret = regmap_write(lt->regmap[I2C_CEC_DSI], 0x10, 0x01); 294 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x11, settle); 295 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x18, hpw); 296 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x19, vpw); 297 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1c, hactive & 0xff); 298 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1d, hactive >> 8); 299 300 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x2f, 0x0c); 301 302 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x34, h_total & 0xff); 303 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x35, h_total >> 8); 304 305 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x36, v_total & 0xff); 306 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x37, v_total >> 8); 307 308 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x38, vbp & 0xff); 309 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x39, vbp >> 8); 310 311 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3a, vfp & 0xff); 312 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3b, vfp >> 8); 313 314 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3c, hbp & 0xff); 315 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3d, hbp >> 8); 316 317 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3e, hfp & 0xff); 318 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3f, hfp >> 8); 319 320 return ret; 321 } 322 323 static int lt8912_soft_power_on(struct lt8912 *lt) 324 { 325 if (!lt->is_power_on) { 326 u32 lanes = lt->data_lanes; 327 328 lt8912_write_init_config(lt); 329 regmap_write(lt->regmap[I2C_CEC_DSI], 0x13, lanes & 3); 330 331 lt8912_write_mipi_basic_config(lt); 332 333 lt->is_power_on = true; 334 } 335 336 return 0; 337 } 338 339 static int lt8912_video_on(struct lt8912 *lt) 340 { 341 int ret; 342 343 ret = lt8912_video_setup(lt); 344 if (ret < 0) 345 goto end; 346 347 ret = lt8912_write_dds_config(lt); 348 if (ret < 0) 349 goto end; 350 351 ret = lt8912_write_rxlogicres_config(lt); 352 if (ret < 0) 353 goto end; 354 355 ret = lt8912_write_lvds_config(lt); 356 if (ret < 0) 357 goto end; 358 359 end: 360 return ret; 361 } 362 363 static enum drm_connector_status lt8912_check_cable_status(struct lt8912 *lt) 364 { 365 int ret; 366 unsigned int reg_val; 367 368 ret = regmap_read(lt->regmap[I2C_MAIN], 0xC1, ®_val); 369 if (ret) 370 return connector_status_unknown; 371 372 if (reg_val & BIT(7)) 373 return connector_status_connected; 374 375 return connector_status_disconnected; 376 } 377 378 static enum drm_connector_status 379 lt8912_connector_detect(struct drm_connector *connector, bool force) 380 { 381 struct lt8912 *lt = connector_to_lt8912(connector); 382 383 if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT) 384 return drm_bridge_detect(lt->hdmi_port); 385 386 return lt8912_check_cable_status(lt); 387 } 388 389 static const struct drm_connector_funcs lt8912_connector_funcs = { 390 .detect = lt8912_connector_detect, 391 .fill_modes = drm_helper_probe_single_connector_modes, 392 .destroy = drm_connector_cleanup, 393 .reset = drm_atomic_helper_connector_reset, 394 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 395 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 396 }; 397 398 static enum drm_mode_status 399 lt8912_connector_mode_valid(struct drm_connector *connector, 400 struct drm_display_mode *mode) 401 { 402 if (mode->clock > 150000) 403 return MODE_CLOCK_HIGH; 404 405 if (mode->hdisplay > 1920) 406 return MODE_BAD_HVALUE; 407 408 if (mode->vdisplay > 1080) 409 return MODE_BAD_VVALUE; 410 411 return MODE_OK; 412 } 413 414 static int lt8912_connector_get_modes(struct drm_connector *connector) 415 { 416 struct edid *edid; 417 int ret = -1; 418 int num = 0; 419 struct lt8912 *lt = connector_to_lt8912(connector); 420 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 421 422 edid = drm_bridge_get_edid(lt->hdmi_port, connector); 423 if (edid) { 424 drm_connector_update_edid_property(connector, edid); 425 num = drm_add_edid_modes(connector, edid); 426 } else { 427 return ret; 428 } 429 430 ret = drm_display_info_set_bus_formats(&connector->display_info, 431 &bus_format, 1); 432 if (ret) 433 num = ret; 434 435 kfree(edid); 436 return num; 437 } 438 439 static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = { 440 .get_modes = lt8912_connector_get_modes, 441 .mode_valid = lt8912_connector_mode_valid, 442 }; 443 444 static void lt8912_bridge_mode_set(struct drm_bridge *bridge, 445 const struct drm_display_mode *mode, 446 const struct drm_display_mode *adj) 447 { 448 struct lt8912 *lt = bridge_to_lt8912(bridge); 449 450 drm_display_mode_to_videomode(adj, <->mode); 451 } 452 453 static void lt8912_bridge_enable(struct drm_bridge *bridge) 454 { 455 struct lt8912 *lt = bridge_to_lt8912(bridge); 456 457 lt8912_video_on(lt); 458 } 459 460 static int lt8912_attach_dsi(struct lt8912 *lt) 461 { 462 struct device *dev = lt->dev; 463 struct mipi_dsi_host *host; 464 struct mipi_dsi_device *dsi; 465 int ret = -1; 466 const struct mipi_dsi_device_info info = { .type = "lt8912", 467 .channel = 0, 468 .node = NULL, 469 }; 470 471 host = of_find_mipi_dsi_host_by_node(lt->host_node); 472 if (!host) { 473 dev_err(dev, "failed to find dsi host\n"); 474 return -EPROBE_DEFER; 475 } 476 477 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 478 if (IS_ERR(dsi)) { 479 ret = PTR_ERR(dsi); 480 dev_err(dev, "failed to create dsi device (%d)\n", ret); 481 return ret; 482 } 483 484 lt->dsi = dsi; 485 486 dsi->lanes = lt->data_lanes; 487 dsi->format = MIPI_DSI_FMT_RGB888; 488 489 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | 490 MIPI_DSI_MODE_VIDEO_BURST | 491 MIPI_DSI_MODE_LPM | 492 MIPI_DSI_MODE_NO_EOT_PACKET; 493 494 ret = devm_mipi_dsi_attach(dev, dsi); 495 if (ret < 0) { 496 dev_err(dev, "failed to attach dsi to host\n"); 497 return ret; 498 } 499 500 return 0; 501 } 502 503 static int lt8912_bridge_connector_init(struct drm_bridge *bridge) 504 { 505 int ret; 506 struct lt8912 *lt = bridge_to_lt8912(bridge); 507 struct drm_connector *connector = <->connector; 508 509 connector->polled = DRM_CONNECTOR_POLL_CONNECT | 510 DRM_CONNECTOR_POLL_DISCONNECT; 511 512 ret = drm_connector_init(bridge->dev, connector, 513 <8912_connector_funcs, 514 lt->hdmi_port->type); 515 if (ret) 516 goto exit; 517 518 drm_connector_helper_add(connector, <8912_connector_helper_funcs); 519 520 connector->dpms = DRM_MODE_DPMS_OFF; 521 drm_connector_attach_encoder(connector, bridge->encoder); 522 523 exit: 524 return ret; 525 } 526 527 static int lt8912_bridge_attach(struct drm_bridge *bridge, 528 enum drm_bridge_attach_flags flags) 529 { 530 struct lt8912 *lt = bridge_to_lt8912(bridge); 531 int ret; 532 533 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 534 ret = lt8912_bridge_connector_init(bridge); 535 if (ret) { 536 dev_err(lt->dev, "Failed to init bridge ! (%d)\n", ret); 537 return ret; 538 } 539 } 540 541 ret = lt8912_hard_power_on(lt); 542 if (ret) 543 return ret; 544 545 ret = lt8912_soft_power_on(lt); 546 if (ret) 547 goto error; 548 549 lt->is_attached = true; 550 551 return 0; 552 553 error: 554 lt8912_hard_power_off(lt); 555 return ret; 556 } 557 558 static void lt8912_bridge_detach(struct drm_bridge *bridge) 559 { 560 struct lt8912 *lt = bridge_to_lt8912(bridge); 561 562 if (lt->is_attached) { 563 lt8912_hard_power_off(lt); 564 drm_connector_unregister(<->connector); 565 drm_connector_cleanup(<->connector); 566 } 567 } 568 569 static enum drm_connector_status 570 lt8912_bridge_detect(struct drm_bridge *bridge) 571 { 572 struct lt8912 *lt = bridge_to_lt8912(bridge); 573 574 if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT) 575 return drm_bridge_detect(lt->hdmi_port); 576 577 return lt8912_check_cable_status(lt); 578 } 579 580 static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge, 581 struct drm_connector *connector) 582 { 583 struct lt8912 *lt = bridge_to_lt8912(bridge); 584 585 /* 586 * edid must be read through the ddc bus but it must be 587 * given to the hdmi connector node. 588 */ 589 if (lt->hdmi_port->ops & DRM_BRIDGE_OP_EDID) 590 return drm_bridge_get_edid(lt->hdmi_port, connector); 591 592 dev_warn(lt->dev, "The connected bridge does not supports DRM_BRIDGE_OP_EDID\n"); 593 return NULL; 594 } 595 596 static const struct drm_bridge_funcs lt8912_bridge_funcs = { 597 .attach = lt8912_bridge_attach, 598 .detach = lt8912_bridge_detach, 599 .mode_set = lt8912_bridge_mode_set, 600 .enable = lt8912_bridge_enable, 601 .detect = lt8912_bridge_detect, 602 .get_edid = lt8912_bridge_get_edid, 603 }; 604 605 static int lt8912_parse_dt(struct lt8912 *lt) 606 { 607 struct gpio_desc *gp_reset; 608 struct device *dev = lt->dev; 609 int ret; 610 int data_lanes; 611 struct device_node *port_node; 612 613 gp_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 614 if (IS_ERR(gp_reset)) { 615 ret = PTR_ERR(gp_reset); 616 if (ret != -EPROBE_DEFER) 617 dev_err(dev, "Failed to get reset gpio: %d\n", ret); 618 return ret; 619 } 620 lt->gp_reset = gp_reset; 621 622 data_lanes = drm_of_get_data_lanes_count_ep(dev->of_node, 0, -1, 1, 4); 623 if (data_lanes < 0) { 624 dev_err(lt->dev, "%s: Bad data-lanes property\n", __func__); 625 return data_lanes; 626 } 627 628 lt->data_lanes = data_lanes; 629 630 lt->host_node = of_graph_get_remote_node(dev->of_node, 0, -1); 631 if (!lt->host_node) { 632 dev_err(lt->dev, "%s: Failed to get remote port\n", __func__); 633 return -ENODEV; 634 } 635 636 port_node = of_graph_get_remote_node(dev->of_node, 1, -1); 637 if (!port_node) { 638 dev_err(lt->dev, "%s: Failed to get connector port\n", __func__); 639 ret = -ENODEV; 640 goto err_free_host_node; 641 } 642 643 lt->hdmi_port = of_drm_find_bridge(port_node); 644 if (!lt->hdmi_port) { 645 dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__); 646 ret = -ENODEV; 647 goto err_free_host_node; 648 } 649 650 if (!of_device_is_compatible(port_node, "hdmi-connector")) { 651 dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__); 652 ret = -EINVAL; 653 goto err_free_host_node; 654 } 655 656 of_node_put(port_node); 657 return 0; 658 659 err_free_host_node: 660 of_node_put(port_node); 661 of_node_put(lt->host_node); 662 return ret; 663 } 664 665 static int lt8912_put_dt(struct lt8912 *lt) 666 { 667 of_node_put(lt->host_node); 668 return 0; 669 } 670 671 static int lt8912_probe(struct i2c_client *client, 672 const struct i2c_device_id *id) 673 { 674 static struct lt8912 *lt; 675 int ret = 0; 676 struct device *dev = &client->dev; 677 678 lt = devm_kzalloc(dev, sizeof(struct lt8912), GFP_KERNEL); 679 if (!lt) 680 return -ENOMEM; 681 682 lt->dev = dev; 683 lt->i2c_client[0] = client; 684 685 ret = lt8912_parse_dt(lt); 686 if (ret) 687 goto err_dt_parse; 688 689 ret = lt8912_init_i2c(lt, client); 690 if (ret) 691 goto err_i2c; 692 693 i2c_set_clientdata(client, lt); 694 695 lt->bridge.funcs = <8912_bridge_funcs; 696 lt->bridge.of_node = dev->of_node; 697 lt->bridge.ops = (DRM_BRIDGE_OP_EDID | 698 DRM_BRIDGE_OP_DETECT); 699 700 drm_bridge_add(<->bridge); 701 702 ret = lt8912_attach_dsi(lt); 703 if (ret) 704 goto err_attach; 705 706 return 0; 707 708 err_attach: 709 drm_bridge_remove(<->bridge); 710 lt8912_free_i2c(lt); 711 err_i2c: 712 lt8912_put_dt(lt); 713 err_dt_parse: 714 return ret; 715 } 716 717 static int lt8912_remove(struct i2c_client *client) 718 { 719 struct lt8912 *lt = i2c_get_clientdata(client); 720 721 lt8912_bridge_detach(<->bridge); 722 drm_bridge_remove(<->bridge); 723 lt8912_free_i2c(lt); 724 lt8912_put_dt(lt); 725 return 0; 726 } 727 728 static const struct of_device_id lt8912_dt_match[] = { 729 {.compatible = "lontium,lt8912b"}, 730 {} 731 }; 732 MODULE_DEVICE_TABLE(of, lt8912_dt_match); 733 734 static const struct i2c_device_id lt8912_id[] = { 735 {"lt8912", 0}, 736 {}, 737 }; 738 MODULE_DEVICE_TABLE(i2c, lt8912_id); 739 740 static struct i2c_driver lt8912_i2c_driver = { 741 .driver = { 742 .name = "lt8912", 743 .of_match_table = lt8912_dt_match, 744 }, 745 .probe = lt8912_probe, 746 .remove = lt8912_remove, 747 .id_table = lt8912_id, 748 }; 749 module_i2c_driver(lt8912_i2c_driver); 750 751 MODULE_AUTHOR("Adrien Grassein <adrien.grassein@gmail.com>"); 752 MODULE_DESCRIPTION("lt8912 drm driver"); 753 MODULE_LICENSE("GPL v2"); 754