1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Ilitek ILI9341 TFT LCD drm_panel driver. 4 * 5 * This panel can be configured to support: 6 * - 16-bit parallel RGB interface 7 * - 18-bit parallel RGB interface 8 * - 4-line serial spi interface 9 * 10 * Copyright (C) 2021 Dillon Min <dillon.minfei@gmail.com> 11 * 12 * For dbi+dpi part: 13 * Derived from drivers/drm/gpu/panel/panel-ilitek-ili9322.c 14 * the reuse of DBI abstraction part referred from Linus's patch 15 * "drm/panel: s6e63m0: Switch to DBI abstraction for SPI" 16 */ 17 18 #include <linux/backlight.h> 19 #include <linux/bitops.h> 20 #include <linux/delay.h> 21 #include <linux/gpio/consumer.h> 22 #include <linux/mod_devicetable.h> 23 #include <linux/module.h> 24 #include <linux/property.h> 25 #include <linux/regulator/consumer.h> 26 #include <linux/spi/spi.h> 27 28 #include <video/mipi_display.h> 29 30 #include <drm/drm_atomic_helper.h> 31 #include <drm/drm_drv.h> 32 #include <drm/drm_fbdev_dma.h> 33 #include <drm/drm_gem_atomic_helper.h> 34 #include <drm/drm_gem_dma_helper.h> 35 #include <drm/drm_gem_framebuffer_helper.h> 36 #include <drm/drm_mipi_dbi.h> 37 #include <drm/drm_modes.h> 38 #include <drm/drm_panel.h> 39 #include <drm/drm_print.h> 40 41 #define ILI9341_RGB_INTERFACE 0xb0 /* RGB Interface Signal Control */ 42 #define ILI9341_FRC 0xb1 /* Frame Rate Control register */ 43 #define ILI9341_DFC 0xb6 /* Display Function Control register */ 44 #define ILI9341_POWER1 0xc0 /* Power Control 1 register */ 45 #define ILI9341_POWER2 0xc1 /* Power Control 2 register */ 46 #define ILI9341_VCOM1 0xc5 /* VCOM Control 1 register */ 47 #define ILI9341_VCOM2 0xc7 /* VCOM Control 2 register */ 48 #define ILI9341_POWERA 0xcb /* Power control A register */ 49 #define ILI9341_POWERB 0xcf /* Power control B register */ 50 #define ILI9341_PGAMMA 0xe0 /* Positive Gamma Correction register */ 51 #define ILI9341_NGAMMA 0xe1 /* Negative Gamma Correction register */ 52 #define ILI9341_DTCA 0xe8 /* Driver timing control A */ 53 #define ILI9341_DTCB 0xea /* Driver timing control B */ 54 #define ILI9341_POWER_SEQ 0xed /* Power on sequence register */ 55 #define ILI9341_3GAMMA_EN 0xf2 /* 3 Gamma enable register */ 56 #define ILI9341_INTERFACE 0xf6 /* Interface control register */ 57 #define ILI9341_PRC 0xf7 /* Pump ratio control register */ 58 #define ILI9341_ETMOD 0xb7 /* Entry mode set */ 59 60 #define ILI9341_MADCTL_BGR BIT(3) 61 #define ILI9341_MADCTL_MV BIT(5) 62 #define ILI9341_MADCTL_MX BIT(6) 63 #define ILI9341_MADCTL_MY BIT(7) 64 65 #define ILI9341_POWER_B_LEN 3 66 #define ILI9341_POWER_SEQ_LEN 4 67 #define ILI9341_DTCA_LEN 3 68 #define ILI9341_DTCB_LEN 2 69 #define ILI9341_POWER_A_LEN 5 70 #define ILI9341_DFC_1_LEN 2 71 #define ILI9341_FRC_LEN 2 72 #define ILI9341_VCOM_1_LEN 2 73 #define ILI9341_DFC_2_LEN 4 74 #define ILI9341_COLUMN_ADDR_LEN 4 75 #define ILI9341_PAGE_ADDR_LEN 4 76 #define ILI9341_INTERFACE_LEN 3 77 #define ILI9341_PGAMMA_LEN 15 78 #define ILI9341_NGAMMA_LEN 15 79 #define ILI9341_CA_LEN 3 80 81 #define ILI9341_PIXEL_DPI_16_BITS (BIT(6) | BIT(4)) 82 #define ILI9341_PIXEL_DPI_18_BITS (BIT(6) | BIT(5)) 83 #define ILI9341_GAMMA_CURVE_1 BIT(0) 84 #define ILI9341_IF_WE_MODE BIT(0) 85 #define ILI9341_IF_BIG_ENDIAN 0x00 86 #define ILI9341_IF_DM_RGB BIT(2) 87 #define ILI9341_IF_DM_INTERNAL 0x00 88 #define ILI9341_IF_DM_VSYNC BIT(3) 89 #define ILI9341_IF_RM_RGB BIT(1) 90 #define ILI9341_IF_RIM_RGB 0x00 91 92 #define ILI9341_COLUMN_ADDR 0x00ef 93 #define ILI9341_PAGE_ADDR 0x013f 94 95 #define ILI9341_RGB_EPL BIT(0) 96 #define ILI9341_RGB_DPL BIT(1) 97 #define ILI9341_RGB_HSPL BIT(2) 98 #define ILI9341_RGB_VSPL BIT(3) 99 #define ILI9341_RGB_DE_MODE BIT(6) 100 #define ILI9341_RGB_DISP_PATH_MEM BIT(7) 101 102 #define ILI9341_DBI_VCOMH_4P6V 0x23 103 #define ILI9341_DBI_PWR_2_DEFAULT 0x10 104 #define ILI9341_DBI_PRC_NORMAL 0x20 105 #define ILI9341_DBI_VCOM_1_VMH_4P25V 0x3e 106 #define ILI9341_DBI_VCOM_1_VML_1P5V 0x28 107 #define ILI9341_DBI_VCOM_2_DEC_58 0x86 108 #define ILI9341_DBI_FRC_DIVA 0x00 109 #define ILI9341_DBI_FRC_RTNA 0x1b 110 #define ILI9341_DBI_EMS_GAS BIT(0) 111 #define ILI9341_DBI_EMS_DTS BIT(1) 112 #define ILI9341_DBI_EMS_GON BIT(2) 113 114 /* struct ili9341_config - the system specific ILI9341 configuration */ 115 struct ili9341_config { 116 u32 max_spi_speed; 117 /* mode: the drm display mode */ 118 const struct drm_display_mode mode; 119 /* ca: TODO: need comments for this register */ 120 u8 ca[ILI9341_CA_LEN]; 121 /* power_b: Power control B (CFh) */ 122 u8 power_b[ILI9341_POWER_B_LEN]; 123 /* power_seq: Power on sequence control (EDh) */ 124 u8 power_seq[ILI9341_POWER_SEQ_LEN]; 125 /* dtca: Driver timing control A (E8h) */ 126 u8 dtca[ILI9341_DTCA_LEN]; 127 /* dtcb: Driver timing control B (EAh) */ 128 u8 dtcb[ILI9341_DTCB_LEN]; 129 /* power_a: Power control A (CBh) */ 130 u8 power_a[ILI9341_POWER_A_LEN]; 131 /* frc: Frame Rate Control (In Normal Mode/Full Colors) (B1h) */ 132 u8 frc[ILI9341_FRC_LEN]; 133 /* prc: Pump ratio control (F7h) */ 134 u8 prc; 135 /* dfc_1: B6h DISCTRL (Display Function Control) */ 136 u8 dfc_1[ILI9341_DFC_1_LEN]; 137 /* power_1: Power Control 1 (C0h) */ 138 u8 power_1; 139 /* power_2: Power Control 2 (C1h) */ 140 u8 power_2; 141 /* vcom_1: VCOM Control 1(C5h) */ 142 u8 vcom_1[ILI9341_VCOM_1_LEN]; 143 /* vcom_2: VCOM Control 2(C7h) */ 144 u8 vcom_2; 145 /* address_mode: Memory Access Control (36h) */ 146 u8 address_mode; 147 /* g3amma_en: Enable 3G (F2h) */ 148 u8 g3amma_en; 149 /* rgb_interface: RGB Interface Signal Control (B0h) */ 150 u8 rgb_interface; 151 /* dfc_2: refer to dfc_1 */ 152 u8 dfc_2[ILI9341_DFC_2_LEN]; 153 /* column_addr: Column Address Set (2Ah) */ 154 u8 column_addr[ILI9341_COLUMN_ADDR_LEN]; 155 /* page_addr: Page Address Set (2Bh) */ 156 u8 page_addr[ILI9341_PAGE_ADDR_LEN]; 157 /* interface: Interface Control (F6h) */ 158 u8 interface[ILI9341_INTERFACE_LEN]; 159 /* 160 * pixel_format: This command sets the pixel format for the RGB 161 * image data used by 162 */ 163 u8 pixel_format; 164 /* 165 * gamma_curve: This command is used to select the desired Gamma 166 * curve for the 167 */ 168 u8 gamma_curve; 169 /* pgamma: Positive Gamma Correction (E0h) */ 170 u8 pgamma[ILI9341_PGAMMA_LEN]; 171 /* ngamma: Negative Gamma Correction (E1h) */ 172 u8 ngamma[ILI9341_NGAMMA_LEN]; 173 }; 174 175 struct ili9341 { 176 const struct ili9341_config *conf; 177 struct drm_panel panel; 178 struct gpio_desc *reset_gpio; 179 struct gpio_desc *dc_gpio; 180 struct mipi_dbi *dbi; 181 u32 max_spi_speed; 182 struct regulator_bulk_data supplies[3]; 183 }; 184 185 /* 186 * The Stm32f429-disco board has a panel ili9341 connected to ltdc controller 187 */ 188 static const struct ili9341_config ili9341_stm32f429_disco_data = { 189 .max_spi_speed = 10000000, 190 .mode = { 191 .clock = 6100, 192 .hdisplay = 240, 193 .hsync_start = 240 + 10,/* hfp 10 */ 194 .hsync_end = 240 + 10 + 10,/* hsync 10 */ 195 .htotal = 240 + 10 + 10 + 20,/* hbp 20 */ 196 .vdisplay = 320, 197 .vsync_start = 320 + 4,/* vfp 4 */ 198 .vsync_end = 320 + 4 + 2,/* vsync 2 */ 199 .vtotal = 320 + 4 + 2 + 2,/* vbp 2 */ 200 .flags = 0, 201 .width_mm = 65, 202 .height_mm = 50, 203 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 204 }, 205 .ca = {0xc3, 0x08, 0x50}, 206 .power_b = {0x00, 0xc1, 0x30}, 207 .power_seq = {0x64, 0x03, 0x12, 0x81}, 208 .dtca = {0x85, 0x00, 0x78}, 209 .power_a = {0x39, 0x2c, 0x00, 0x34, 0x02}, 210 .prc = 0x20, 211 .dtcb = {0x00, 0x00}, 212 /* 0x00 fosc, 0x1b 70hz */ 213 .frc = {0x00, 0x1b}, 214 /* 215 * 0x0a Interval scan, AGND AGND AGND AGND 216 * 0xa2 Normally white, G1 -> G320, S720 -> S1, 217 * Scan Cycle 5 frames,85ms 218 */ 219 .dfc_1 = {0x0a, 0xa2}, 220 /* 0x10 3.65v */ 221 .power_1 = 0x10, 222 /* 0x10 AVDD=vci*2, VGH=vci*7, VGL=-vci*4 */ 223 .power_2 = 0x10, 224 /* 0x45 VCOMH 4.425v, 0x15 VCOML -1.975*/ 225 .vcom_1 = {0x45, 0x15}, 226 /* 0x90 offset voltage, VMH-48, VML-48 */ 227 .vcom_2 = 0x90, 228 /* 229 * 0xc8 Row Address Order, Column Address Order 230 * BGR 1 231 */ 232 .address_mode = 0xc8, 233 .g3amma_en = 0x00, 234 /* 235 * 0xc2 236 * Display Data Path: Memory 237 * RGB: DE mode 238 * DOTCLK polarity set (data fetched at the falling time) 239 */ 240 .rgb_interface = ILI9341_RGB_DISP_PATH_MEM | 241 ILI9341_RGB_DE_MODE | 242 ILI9341_RGB_DPL, 243 /* 244 * 0x0a 245 * Gate outputs in non-display area: Interval scan 246 * Determine source/VCOM output in a non-display area in the partial 247 * display mode: AGND AGND AGND AGND 248 * 249 * 0xa7 250 * Scan Cycle: 15 frames 251 * fFLM = 60Hz: 255ms 252 * Liquid crystal type: Normally white 253 * Gate Output Scan Direction: G1 -> G320 254 * Source Output Scan Direction: S720 -> S1 255 * 256 * 0x27 257 * LCD Driver Line: 320 lines 258 * 259 * 0x04 260 * PCDIV: 4 261 */ 262 .dfc_2 = {0x0a, 0xa7, 0x27, 0x04}, 263 /* column address: 240 */ 264 .column_addr = {0x00, 0x00, (ILI9341_COLUMN_ADDR >> 4) & 0xff, 265 ILI9341_COLUMN_ADDR & 0xff}, 266 /* page address: 320 */ 267 .page_addr = {0x00, 0x00, (ILI9341_PAGE_ADDR >> 4) & 0xff, 268 ILI9341_PAGE_ADDR & 0xff}, 269 /* 270 * Memory write control: When the transfer number of data exceeds 271 * (EC-SC+1)*(EP-SP+1), the column and page number will be 272 * reset, and the exceeding data will be written into the following 273 * column and page. 274 * Display Operation Mode: RGB Interface Mode 275 * Interface for RAM Access: RGB interface 276 * 16- bit RGB interface (1 transfer/pixel) 277 */ 278 .interface = {ILI9341_IF_WE_MODE, 0x00, 279 ILI9341_IF_DM_RGB | ILI9341_IF_RM_RGB}, 280 /* DPI: 16 bits / pixel */ 281 .pixel_format = ILI9341_PIXEL_DPI_16_BITS, 282 /* Curve Selected: Gamma curve 1 (G2.2) */ 283 .gamma_curve = ILI9341_GAMMA_CURVE_1, 284 .pgamma = {0x0f, 0x29, 0x24, 0x0c, 0x0e, 285 0x09, 0x4e, 0x78, 0x3c, 0x09, 286 0x13, 0x05, 0x17, 0x11, 0x00}, 287 .ngamma = {0x00, 0x16, 0x1b, 0x04, 0x11, 288 0x07, 0x31, 0x33, 0x42, 0x05, 289 0x0c, 0x0a, 0x28, 0x2f, 0x0f}, 290 }; 291 292 static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel) 293 { 294 return container_of(panel, struct ili9341, panel); 295 } 296 297 static void ili9341_dpi_init(struct ili9341 *ili) 298 { 299 struct device *dev = (&ili->panel)->dev; 300 struct mipi_dbi *dbi = ili->dbi; 301 struct ili9341_config *cfg = (struct ili9341_config *)ili->conf; 302 303 /* Power Control */ 304 mipi_dbi_command_stackbuf(dbi, 0xca, cfg->ca, ILI9341_CA_LEN); 305 mipi_dbi_command_stackbuf(dbi, ILI9341_POWERB, cfg->power_b, 306 ILI9341_POWER_B_LEN); 307 mipi_dbi_command_stackbuf(dbi, ILI9341_POWER_SEQ, cfg->power_seq, 308 ILI9341_POWER_SEQ_LEN); 309 mipi_dbi_command_stackbuf(dbi, ILI9341_DTCA, cfg->dtca, 310 ILI9341_DTCA_LEN); 311 mipi_dbi_command_stackbuf(dbi, ILI9341_POWERA, cfg->power_a, 312 ILI9341_POWER_A_LEN); 313 mipi_dbi_command(ili->dbi, ILI9341_PRC, cfg->prc); 314 mipi_dbi_command_stackbuf(dbi, ILI9341_DTCB, cfg->dtcb, 315 ILI9341_DTCB_LEN); 316 mipi_dbi_command_stackbuf(dbi, ILI9341_FRC, cfg->frc, ILI9341_FRC_LEN); 317 mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_1, 318 ILI9341_DFC_1_LEN); 319 mipi_dbi_command(dbi, ILI9341_POWER1, cfg->power_1); 320 mipi_dbi_command(dbi, ILI9341_POWER2, cfg->power_2); 321 322 /* VCOM */ 323 mipi_dbi_command_stackbuf(dbi, ILI9341_VCOM1, cfg->vcom_1, 324 ILI9341_VCOM_1_LEN); 325 mipi_dbi_command(dbi, ILI9341_VCOM2, cfg->vcom_2); 326 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, cfg->address_mode); 327 328 /* Gamma */ 329 mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, cfg->g3amma_en); 330 mipi_dbi_command(dbi, ILI9341_RGB_INTERFACE, cfg->rgb_interface); 331 mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_2, 332 ILI9341_DFC_2_LEN); 333 334 /* Colomn address set */ 335 mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_COLUMN_ADDRESS, 336 cfg->column_addr, ILI9341_COLUMN_ADDR_LEN); 337 338 /* Page address set */ 339 mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_PAGE_ADDRESS, 340 cfg->page_addr, ILI9341_PAGE_ADDR_LEN); 341 mipi_dbi_command_stackbuf(dbi, ILI9341_INTERFACE, cfg->interface, 342 ILI9341_INTERFACE_LEN); 343 344 /* Format */ 345 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, cfg->pixel_format); 346 mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START); 347 msleep(200); 348 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, cfg->gamma_curve); 349 mipi_dbi_command_stackbuf(dbi, ILI9341_PGAMMA, cfg->pgamma, 350 ILI9341_PGAMMA_LEN); 351 mipi_dbi_command_stackbuf(dbi, ILI9341_NGAMMA, cfg->ngamma, 352 ILI9341_NGAMMA_LEN); 353 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); 354 msleep(200); 355 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); 356 mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START); 357 358 dev_info(dev, "Initialized display rgb interface\n"); 359 } 360 361 static int ili9341_dpi_power_on(struct ili9341 *ili) 362 { 363 struct device *dev = (&ili->panel)->dev; 364 int ret = 0; 365 366 /* Assert RESET */ 367 gpiod_set_value(ili->reset_gpio, 1); 368 369 /* Enable power */ 370 ret = regulator_bulk_enable(ARRAY_SIZE(ili->supplies), 371 ili->supplies); 372 if (ret < 0) { 373 dev_err(dev, "unable to enable vcc\n"); 374 return ret; 375 } 376 msleep(20); 377 378 /* De-assert RESET */ 379 gpiod_set_value(ili->reset_gpio, 0); 380 msleep(20); 381 382 return 0; 383 } 384 385 static int ili9341_dpi_power_off(struct ili9341 *ili) 386 { 387 /* Assert RESET */ 388 gpiod_set_value(ili->reset_gpio, 1); 389 390 /* Disable power */ 391 return regulator_bulk_disable(ARRAY_SIZE(ili->supplies), 392 ili->supplies); 393 } 394 395 static int ili9341_dpi_disable(struct drm_panel *panel) 396 { 397 struct ili9341 *ili = panel_to_ili9341(panel); 398 399 mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_OFF); 400 return 0; 401 } 402 403 static int ili9341_dpi_unprepare(struct drm_panel *panel) 404 { 405 struct ili9341 *ili = panel_to_ili9341(panel); 406 407 return ili9341_dpi_power_off(ili); 408 } 409 410 static int ili9341_dpi_prepare(struct drm_panel *panel) 411 { 412 struct ili9341 *ili = panel_to_ili9341(panel); 413 int ret; 414 415 ret = ili9341_dpi_power_on(ili); 416 if (ret < 0) 417 return ret; 418 419 ili9341_dpi_init(ili); 420 421 return 0; 422 } 423 424 static int ili9341_dpi_enable(struct drm_panel *panel) 425 { 426 struct ili9341 *ili = panel_to_ili9341(panel); 427 428 mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_ON); 429 return 0; 430 } 431 432 static int ili9341_dpi_get_modes(struct drm_panel *panel, 433 struct drm_connector *connector) 434 { 435 struct ili9341 *ili = panel_to_ili9341(panel); 436 struct drm_device *drm = connector->dev; 437 struct drm_display_mode *mode; 438 struct drm_display_info *info; 439 440 info = &connector->display_info; 441 info->width_mm = ili->conf->mode.width_mm; 442 info->height_mm = ili->conf->mode.height_mm; 443 444 if (ili->conf->rgb_interface & ILI9341_RGB_DPL) 445 info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 446 else 447 info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 448 449 if (ili->conf->rgb_interface & ILI9341_RGB_EPL) 450 info->bus_flags |= DRM_BUS_FLAG_DE_LOW; 451 else 452 info->bus_flags |= DRM_BUS_FLAG_DE_HIGH; 453 454 mode = drm_mode_duplicate(drm, &ili->conf->mode); 455 if (!mode) { 456 drm_err(drm, "bad mode or failed to add mode\n"); 457 return -EINVAL; 458 } 459 drm_mode_set_name(mode); 460 461 /* Set up the polarity */ 462 if (ili->conf->rgb_interface & ILI9341_RGB_HSPL) 463 mode->flags |= DRM_MODE_FLAG_PHSYNC; 464 else 465 mode->flags |= DRM_MODE_FLAG_NHSYNC; 466 467 if (ili->conf->rgb_interface & ILI9341_RGB_VSPL) 468 mode->flags |= DRM_MODE_FLAG_PVSYNC; 469 else 470 mode->flags |= DRM_MODE_FLAG_NVSYNC; 471 472 drm_mode_probed_add(connector, mode); 473 474 return 1; /* Number of modes */ 475 } 476 477 static const struct drm_panel_funcs ili9341_dpi_funcs = { 478 .disable = ili9341_dpi_disable, 479 .unprepare = ili9341_dpi_unprepare, 480 .prepare = ili9341_dpi_prepare, 481 .enable = ili9341_dpi_enable, 482 .get_modes = ili9341_dpi_get_modes, 483 }; 484 485 static int ili9341_dpi_probe(struct spi_device *spi, struct gpio_desc *dc, 486 struct gpio_desc *reset) 487 { 488 struct device *dev = &spi->dev; 489 struct ili9341 *ili; 490 int ret; 491 492 ili = devm_drm_panel_alloc(dev, struct ili9341, panel, 493 &ili9341_dpi_funcs, 494 DRM_MODE_CONNECTOR_DPI); 495 if (IS_ERR(ili)) 496 return PTR_ERR(ili); 497 498 ili->dbi = devm_kzalloc(dev, sizeof(struct mipi_dbi), 499 GFP_KERNEL); 500 if (!ili->dbi) 501 return -ENOMEM; 502 503 ili->supplies[0].supply = "vci"; 504 ili->supplies[1].supply = "vddi"; 505 ili->supplies[2].supply = "vddi-led"; 506 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ili->supplies), 507 ili->supplies); 508 if (ret < 0) { 509 dev_err(dev, "failed to get regulators: %d\n", ret); 510 return ret; 511 } 512 513 ret = mipi_dbi_spi_init(spi, ili->dbi, dc); 514 if (ret) 515 return ret; 516 517 spi_set_drvdata(spi, ili); 518 ili->reset_gpio = reset; 519 /* 520 * Every new incarnation of this display must have a unique 521 * data entry for the system in this driver. 522 */ 523 ili->conf = device_get_match_data(dev); 524 if (!ili->conf) { 525 dev_err(dev, "missing device configuration\n"); 526 return -ENODEV; 527 } 528 529 ili->max_spi_speed = ili->conf->max_spi_speed; 530 drm_panel_add(&ili->panel); 531 532 return 0; 533 } 534 535 static int ili9341_probe(struct spi_device *spi) 536 { 537 struct device *dev = &spi->dev; 538 struct gpio_desc *dc; 539 struct gpio_desc *reset; 540 541 reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 542 if (IS_ERR(reset)) 543 return dev_err_probe(dev, PTR_ERR(reset), "Failed to get gpio 'reset'\n"); 544 545 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); 546 if (IS_ERR(dc)) 547 return dev_err_probe(dev, PTR_ERR(dc), "Failed to get gpio 'dc'\n"); 548 549 return ili9341_dpi_probe(spi, dc, reset); 550 } 551 552 static void ili9341_remove(struct spi_device *spi) 553 { 554 struct ili9341 *ili = spi_get_drvdata(spi); 555 556 ili9341_dpi_power_off(ili); 557 drm_panel_remove(&ili->panel); 558 } 559 560 static const struct of_device_id ili9341_of_match[] = { 561 { 562 .compatible = "st,sf-tc240t-9370-t", 563 .data = &ili9341_stm32f429_disco_data, 564 }, 565 { } 566 }; 567 MODULE_DEVICE_TABLE(of, ili9341_of_match); 568 569 static const struct spi_device_id ili9341_id[] = { 570 { "sf-tc240t-9370-t", 0 }, 571 { } 572 }; 573 MODULE_DEVICE_TABLE(spi, ili9341_id); 574 575 static struct spi_driver ili9341_driver = { 576 .probe = ili9341_probe, 577 .remove = ili9341_remove, 578 .id_table = ili9341_id, 579 .driver = { 580 .name = "panel-ilitek-ili9341", 581 .of_match_table = ili9341_of_match, 582 }, 583 }; 584 module_spi_driver(ili9341_driver); 585 586 MODULE_AUTHOR("Dillon Min <dillon.minfei@gmail.com>"); 587 MODULE_DESCRIPTION("ILI9341 LCD panel driver"); 588 MODULE_LICENSE("GPL v2"); 589