1 /* 2 * LCD/Backlight Driver for Sharp Zaurus Handhelds (various models) 3 * 4 * Copyright (c) 2004-2006 Richard Purdie 5 * 6 * Based on Sharp's 2.4 Backlight Driver 7 * 8 * Copyright (c) 2008 Marvell International Ltd. 9 * Converted to SPI device based LCD/Backlight device driver 10 * by Eric Miao <eric.miao@marvell.com> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include <linux/kernel.h> 20 #include <linux/init.h> 21 #include <linux/delay.h> 22 #include <linux/gpio.h> 23 #include <linux/fb.h> 24 #include <linux/lcd.h> 25 #include <linux/spi/spi.h> 26 #include <linux/spi/corgi_lcd.h> 27 #include <linux/slab.h> 28 #include <asm/mach/sharpsl_param.h> 29 30 #define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) 31 32 /* Register Addresses */ 33 #define RESCTL_ADRS 0x00 34 #define PHACTRL_ADRS 0x01 35 #define DUTYCTRL_ADRS 0x02 36 #define POWERREG0_ADRS 0x03 37 #define POWERREG1_ADRS 0x04 38 #define GPOR3_ADRS 0x05 39 #define PICTRL_ADRS 0x06 40 #define POLCTRL_ADRS 0x07 41 42 /* Register Bit Definitions */ 43 #define RESCTL_QVGA 0x01 44 #define RESCTL_VGA 0x00 45 46 #define POWER1_VW_ON 0x01 /* VW Supply FET ON */ 47 #define POWER1_GVSS_ON 0x02 /* GVSS(-8V) Power Supply ON */ 48 #define POWER1_VDD_ON 0x04 /* VDD(8V),SVSS(-4V) Power Supply ON */ 49 50 #define POWER1_VW_OFF 0x00 /* VW Supply FET OFF */ 51 #define POWER1_GVSS_OFF 0x00 /* GVSS(-8V) Power Supply OFF */ 52 #define POWER1_VDD_OFF 0x00 /* VDD(8V),SVSS(-4V) Power Supply OFF */ 53 54 #define POWER0_COM_DCLK 0x01 /* COM Voltage DC Bias DAC Serial Data Clock */ 55 #define POWER0_COM_DOUT 0x02 /* COM Voltage DC Bias DAC Serial Data Out */ 56 #define POWER0_DAC_ON 0x04 /* DAC Power Supply ON */ 57 #define POWER0_COM_ON 0x08 /* COM Power Supply ON */ 58 #define POWER0_VCC5_ON 0x10 /* VCC5 Power Supply ON */ 59 60 #define POWER0_DAC_OFF 0x00 /* DAC Power Supply OFF */ 61 #define POWER0_COM_OFF 0x00 /* COM Power Supply OFF */ 62 #define POWER0_VCC5_OFF 0x00 /* VCC5 Power Supply OFF */ 63 64 #define PICTRL_INIT_STATE 0x01 65 #define PICTRL_INIOFF 0x02 66 #define PICTRL_POWER_DOWN 0x04 67 #define PICTRL_COM_SIGNAL_OFF 0x08 68 #define PICTRL_DAC_SIGNAL_OFF 0x10 69 70 #define POLCTRL_SYNC_POL_FALL 0x01 71 #define POLCTRL_EN_POL_FALL 0x02 72 #define POLCTRL_DATA_POL_FALL 0x04 73 #define POLCTRL_SYNC_ACT_H 0x08 74 #define POLCTRL_EN_ACT_L 0x10 75 76 #define POLCTRL_SYNC_POL_RISE 0x00 77 #define POLCTRL_EN_POL_RISE 0x00 78 #define POLCTRL_DATA_POL_RISE 0x00 79 #define POLCTRL_SYNC_ACT_L 0x00 80 #define POLCTRL_EN_ACT_H 0x00 81 82 #define PHACTRL_PHASE_MANUAL 0x01 83 #define DEFAULT_PHAD_QVGA (9) 84 #define DEFAULT_COMADJ (125) 85 86 struct corgi_lcd { 87 struct spi_device *spi_dev; 88 struct lcd_device *lcd_dev; 89 struct backlight_device *bl_dev; 90 91 int limit_mask; 92 int intensity; 93 int power; 94 int mode; 95 char buf[2]; 96 97 int gpio_backlight_on; 98 int gpio_backlight_cont; 99 int gpio_backlight_cont_inverted; 100 101 void (*kick_battery)(void); 102 }; 103 104 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val); 105 106 static struct corgi_lcd *the_corgi_lcd; 107 static unsigned long corgibl_flags; 108 #define CORGIBL_SUSPENDED 0x01 109 #define CORGIBL_BATTLOW 0x02 110 111 /* 112 * This is only a pseudo I2C interface. We can't use the standard kernel 113 * routines as the interface is write only. We just assume the data is acked... 114 */ 115 static void lcdtg_ssp_i2c_send(struct corgi_lcd *lcd, uint8_t data) 116 { 117 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, data); 118 udelay(10); 119 } 120 121 static void lcdtg_i2c_send_bit(struct corgi_lcd *lcd, uint8_t data) 122 { 123 lcdtg_ssp_i2c_send(lcd, data); 124 lcdtg_ssp_i2c_send(lcd, data | POWER0_COM_DCLK); 125 lcdtg_ssp_i2c_send(lcd, data); 126 } 127 128 static void lcdtg_i2c_send_start(struct corgi_lcd *lcd, uint8_t base) 129 { 130 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT); 131 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK); 132 lcdtg_ssp_i2c_send(lcd, base); 133 } 134 135 static void lcdtg_i2c_send_stop(struct corgi_lcd *lcd, uint8_t base) 136 { 137 lcdtg_ssp_i2c_send(lcd, base); 138 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK); 139 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT); 140 } 141 142 static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd, 143 uint8_t base, uint8_t data) 144 { 145 int i; 146 for (i = 0; i < 8; i++) { 147 if (data & 0x80) 148 lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT); 149 else 150 lcdtg_i2c_send_bit(lcd, base); 151 data <<= 1; 152 } 153 } 154 155 static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base) 156 { 157 lcdtg_i2c_send_bit(lcd, base); 158 } 159 160 static void lcdtg_set_common_voltage(struct corgi_lcd *lcd, 161 uint8_t base_data, uint8_t data) 162 { 163 /* Set Common Voltage to M62332FP via I2C */ 164 lcdtg_i2c_send_start(lcd, base_data); 165 lcdtg_i2c_send_byte(lcd, base_data, 0x9c); 166 lcdtg_i2c_wait_ack(lcd, base_data); 167 lcdtg_i2c_send_byte(lcd, base_data, 0x00); 168 lcdtg_i2c_wait_ack(lcd, base_data); 169 lcdtg_i2c_send_byte(lcd, base_data, data); 170 lcdtg_i2c_wait_ack(lcd, base_data); 171 lcdtg_i2c_send_stop(lcd, base_data); 172 } 173 174 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data) 175 { 176 struct spi_message msg; 177 struct spi_transfer xfer = { 178 .len = 1, 179 .cs_change = 1, 180 .tx_buf = lcd->buf, 181 }; 182 183 lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f); 184 spi_message_init(&msg); 185 spi_message_add_tail(&xfer, &msg); 186 187 return spi_sync(lcd->spi_dev, &msg); 188 } 189 190 /* Set Phase Adjust */ 191 static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode) 192 { 193 int adj; 194 195 switch (mode) { 196 case CORGI_LCD_MODE_VGA: 197 /* Setting for VGA */ 198 adj = sharpsl_param.phadadj; 199 adj = (adj < 0) ? PHACTRL_PHASE_MANUAL : 200 PHACTRL_PHASE_MANUAL | ((adj & 0xf) << 1); 201 break; 202 case CORGI_LCD_MODE_QVGA: 203 default: 204 /* Setting for QVGA */ 205 adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL; 206 break; 207 } 208 209 corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj); 210 } 211 212 static void corgi_lcd_power_on(struct corgi_lcd *lcd) 213 { 214 int comadj; 215 216 /* Initialize Internal Logic & Port */ 217 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 218 PICTRL_POWER_DOWN | PICTRL_INIOFF | 219 PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF | 220 PICTRL_DAC_SIGNAL_OFF); 221 222 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 223 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF | 224 POWER0_COM_OFF | POWER0_VCC5_OFF); 225 226 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 227 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF); 228 229 /* VDD(+8V), SVSS(-4V) ON */ 230 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 231 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON); 232 mdelay(3); 233 234 /* DAC ON */ 235 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 236 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | 237 POWER0_COM_OFF | POWER0_VCC5_OFF); 238 239 /* INIB = H, INI = L */ 240 /* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */ 241 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 242 PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF); 243 244 /* Set Common Voltage */ 245 comadj = sharpsl_param.comadj; 246 if (comadj < 0) 247 comadj = DEFAULT_COMADJ; 248 249 lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF | 250 POWER0_VCC5_OFF, comadj); 251 252 /* VCC5 ON, DAC ON */ 253 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 254 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | 255 POWER0_COM_OFF | POWER0_VCC5_ON); 256 257 /* GVSS(-8V) ON, VDD ON */ 258 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 259 POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON); 260 mdelay(2); 261 262 /* COM SIGNAL ON (PICTL[3] = L) */ 263 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE); 264 265 /* COM ON, DAC ON, VCC5_ON */ 266 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 267 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | 268 POWER0_COM_ON | POWER0_VCC5_ON); 269 270 /* VW ON, GVSS ON, VDD ON */ 271 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 272 POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON); 273 274 /* Signals output enable */ 275 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0); 276 277 /* Set Phase Adjust */ 278 lcdtg_set_phadadj(lcd, lcd->mode); 279 280 /* Initialize for Input Signals from ATI */ 281 corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS, 282 POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE | 283 POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L | 284 POLCTRL_EN_ACT_H); 285 udelay(1000); 286 287 switch (lcd->mode) { 288 case CORGI_LCD_MODE_VGA: 289 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA); 290 break; 291 case CORGI_LCD_MODE_QVGA: 292 default: 293 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA); 294 break; 295 } 296 } 297 298 static void corgi_lcd_power_off(struct corgi_lcd *lcd) 299 { 300 /* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */ 301 msleep(34); 302 303 /* (1)VW OFF */ 304 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 305 POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON); 306 307 /* (2)COM OFF */ 308 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF); 309 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 310 POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON); 311 312 /* (3)Set Common Voltage Bias 0V */ 313 lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF | 314 POWER0_VCC5_ON, 0); 315 316 /* (4)GVSS OFF */ 317 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 318 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON); 319 320 /* (5)VCC5 OFF */ 321 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 322 POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF); 323 324 /* (6)Set PDWN, INIOFF, DACOFF */ 325 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 326 PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF | 327 PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF); 328 329 /* (7)DAC OFF */ 330 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 331 POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF); 332 333 /* (8)VDD OFF */ 334 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 335 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF); 336 } 337 338 static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m) 339 { 340 struct corgi_lcd *lcd = lcd_get_data(ld); 341 int mode = CORGI_LCD_MODE_QVGA; 342 343 if (m->xres == 640 || m->xres == 480) 344 mode = CORGI_LCD_MODE_VGA; 345 346 if (lcd->mode == mode) 347 return 0; 348 349 lcdtg_set_phadadj(lcd, mode); 350 351 switch (mode) { 352 case CORGI_LCD_MODE_VGA: 353 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA); 354 break; 355 case CORGI_LCD_MODE_QVGA: 356 default: 357 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA); 358 break; 359 } 360 361 lcd->mode = mode; 362 return 0; 363 } 364 365 static int corgi_lcd_set_power(struct lcd_device *ld, int power) 366 { 367 struct corgi_lcd *lcd = lcd_get_data(ld); 368 369 if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) 370 corgi_lcd_power_on(lcd); 371 372 if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) 373 corgi_lcd_power_off(lcd); 374 375 lcd->power = power; 376 return 0; 377 } 378 379 static int corgi_lcd_get_power(struct lcd_device *ld) 380 { 381 struct corgi_lcd *lcd = lcd_get_data(ld); 382 383 return lcd->power; 384 } 385 386 static struct lcd_ops corgi_lcd_ops = { 387 .get_power = corgi_lcd_get_power, 388 .set_power = corgi_lcd_set_power, 389 .set_mode = corgi_lcd_set_mode, 390 }; 391 392 static int corgi_bl_get_intensity(struct backlight_device *bd) 393 { 394 struct corgi_lcd *lcd = bl_get_data(bd); 395 396 return lcd->intensity; 397 } 398 399 static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity) 400 { 401 int cont; 402 403 if (intensity > 0x10) 404 intensity += 0x10; 405 406 corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity); 407 408 /* Bit 5 via GPIO_BACKLIGHT_CONT */ 409 cont = !!(intensity & 0x20) ^ lcd->gpio_backlight_cont_inverted; 410 411 if (gpio_is_valid(lcd->gpio_backlight_cont)) 412 gpio_set_value_cansleep(lcd->gpio_backlight_cont, cont); 413 414 if (gpio_is_valid(lcd->gpio_backlight_on)) 415 gpio_set_value_cansleep(lcd->gpio_backlight_on, intensity); 416 417 if (lcd->kick_battery) 418 lcd->kick_battery(); 419 420 lcd->intensity = intensity; 421 return 0; 422 } 423 424 static int corgi_bl_update_status(struct backlight_device *bd) 425 { 426 struct corgi_lcd *lcd = bl_get_data(bd); 427 int intensity = bd->props.brightness; 428 429 if (bd->props.power != FB_BLANK_UNBLANK) 430 intensity = 0; 431 432 if (bd->props.fb_blank != FB_BLANK_UNBLANK) 433 intensity = 0; 434 435 if (corgibl_flags & CORGIBL_SUSPENDED) 436 intensity = 0; 437 438 if ((corgibl_flags & CORGIBL_BATTLOW) && intensity > lcd->limit_mask) 439 intensity = lcd->limit_mask; 440 441 return corgi_bl_set_intensity(lcd, intensity); 442 } 443 444 void corgi_lcd_limit_intensity(int limit) 445 { 446 if (limit) 447 corgibl_flags |= CORGIBL_BATTLOW; 448 else 449 corgibl_flags &= ~CORGIBL_BATTLOW; 450 451 backlight_update_status(the_corgi_lcd->bl_dev); 452 } 453 EXPORT_SYMBOL(corgi_lcd_limit_intensity); 454 455 static const struct backlight_ops corgi_bl_ops = { 456 .get_brightness = corgi_bl_get_intensity, 457 .update_status = corgi_bl_update_status, 458 }; 459 460 #ifdef CONFIG_PM_SLEEP 461 static int corgi_lcd_suspend(struct device *dev) 462 { 463 struct corgi_lcd *lcd = dev_get_drvdata(dev); 464 465 corgibl_flags |= CORGIBL_SUSPENDED; 466 corgi_bl_set_intensity(lcd, 0); 467 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); 468 return 0; 469 } 470 471 static int corgi_lcd_resume(struct device *dev) 472 { 473 struct corgi_lcd *lcd = dev_get_drvdata(dev); 474 475 corgibl_flags &= ~CORGIBL_SUSPENDED; 476 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); 477 backlight_update_status(lcd->bl_dev); 478 return 0; 479 } 480 #endif 481 482 static SIMPLE_DEV_PM_OPS(corgi_lcd_pm_ops, corgi_lcd_suspend, corgi_lcd_resume); 483 484 static int setup_gpio_backlight(struct corgi_lcd *lcd, 485 struct corgi_lcd_platform_data *pdata) 486 { 487 struct spi_device *spi = lcd->spi_dev; 488 int err; 489 490 lcd->gpio_backlight_on = -1; 491 lcd->gpio_backlight_cont = -1; 492 493 if (gpio_is_valid(pdata->gpio_backlight_on)) { 494 err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_on, 495 "BL_ON"); 496 if (err) { 497 dev_err(&spi->dev, 498 "failed to request GPIO%d for backlight_on\n", 499 pdata->gpio_backlight_on); 500 return err; 501 } 502 503 lcd->gpio_backlight_on = pdata->gpio_backlight_on; 504 gpio_direction_output(lcd->gpio_backlight_on, 0); 505 } 506 507 if (gpio_is_valid(pdata->gpio_backlight_cont)) { 508 err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_cont, 509 "BL_CONT"); 510 if (err) { 511 dev_err(&spi->dev, 512 "failed to request GPIO%d for backlight_cont\n", 513 pdata->gpio_backlight_cont); 514 return err; 515 } 516 517 lcd->gpio_backlight_cont = pdata->gpio_backlight_cont; 518 519 /* spitz and akita use both GPIOs for backlight, and 520 * have inverted polarity of GPIO_BACKLIGHT_CONT 521 */ 522 if (gpio_is_valid(lcd->gpio_backlight_on)) { 523 lcd->gpio_backlight_cont_inverted = 1; 524 gpio_direction_output(lcd->gpio_backlight_cont, 1); 525 } else { 526 lcd->gpio_backlight_cont_inverted = 0; 527 gpio_direction_output(lcd->gpio_backlight_cont, 0); 528 } 529 } 530 return 0; 531 } 532 533 static int corgi_lcd_probe(struct spi_device *spi) 534 { 535 struct backlight_properties props; 536 struct corgi_lcd_platform_data *pdata = dev_get_platdata(&spi->dev); 537 struct corgi_lcd *lcd; 538 int ret = 0; 539 540 if (pdata == NULL) { 541 dev_err(&spi->dev, "platform data not available\n"); 542 return -EINVAL; 543 } 544 545 lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL); 546 if (!lcd) { 547 dev_err(&spi->dev, "failed to allocate memory\n"); 548 return -ENOMEM; 549 } 550 551 lcd->spi_dev = spi; 552 553 lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "corgi_lcd", 554 &spi->dev, lcd, &corgi_lcd_ops); 555 if (IS_ERR(lcd->lcd_dev)) 556 return PTR_ERR(lcd->lcd_dev); 557 558 lcd->power = FB_BLANK_POWERDOWN; 559 lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA; 560 561 memset(&props, 0, sizeof(struct backlight_properties)); 562 props.type = BACKLIGHT_RAW; 563 props.max_brightness = pdata->max_intensity; 564 lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl", 565 &spi->dev, lcd, &corgi_bl_ops, 566 &props); 567 if (IS_ERR(lcd->bl_dev)) 568 return PTR_ERR(lcd->bl_dev); 569 570 lcd->bl_dev->props.brightness = pdata->default_intensity; 571 lcd->bl_dev->props.power = FB_BLANK_UNBLANK; 572 573 ret = setup_gpio_backlight(lcd, pdata); 574 if (ret) 575 return ret; 576 577 lcd->kick_battery = pdata->kick_battery; 578 579 spi_set_drvdata(spi, lcd); 580 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); 581 backlight_update_status(lcd->bl_dev); 582 583 lcd->limit_mask = pdata->limit_mask; 584 the_corgi_lcd = lcd; 585 return 0; 586 } 587 588 static int corgi_lcd_remove(struct spi_device *spi) 589 { 590 struct corgi_lcd *lcd = spi_get_drvdata(spi); 591 592 lcd->bl_dev->props.power = FB_BLANK_UNBLANK; 593 lcd->bl_dev->props.brightness = 0; 594 backlight_update_status(lcd->bl_dev); 595 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); 596 return 0; 597 } 598 599 static struct spi_driver corgi_lcd_driver = { 600 .driver = { 601 .name = "corgi-lcd", 602 .owner = THIS_MODULE, 603 .pm = &corgi_lcd_pm_ops, 604 }, 605 .probe = corgi_lcd_probe, 606 .remove = corgi_lcd_remove, 607 }; 608 609 module_spi_driver(corgi_lcd_driver); 610 611 MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00"); 612 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); 613 MODULE_LICENSE("GPL"); 614 MODULE_ALIAS("spi:corgi-lcd"); 615