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 86struct 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 104static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val); 105 106static struct corgi_lcd *the_corgi_lcd; 107static 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 */ 115static 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 121static 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 128static 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 135static 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 142static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd, 143 uint8_t base, uint8_t data) 144{ 145 int i; 146 147 for (i = 0; i < 8; i++) { 148 if (data & 0x80) 149 lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT); 150 else 151 lcdtg_i2c_send_bit(lcd, base); 152 data <<= 1; 153 } 154} 155 156static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base) 157{ 158 lcdtg_i2c_send_bit(lcd, base); 159} 160 161static void lcdtg_set_common_voltage(struct corgi_lcd *lcd, 162 uint8_t base_data, uint8_t data) 163{ 164 /* Set Common Voltage to M62332FP via I2C */ 165 lcdtg_i2c_send_start(lcd, base_data); 166 lcdtg_i2c_send_byte(lcd, base_data, 0x9c); 167 lcdtg_i2c_wait_ack(lcd, base_data); 168 lcdtg_i2c_send_byte(lcd, base_data, 0x00); 169 lcdtg_i2c_wait_ack(lcd, base_data); 170 lcdtg_i2c_send_byte(lcd, base_data, data); 171 lcdtg_i2c_wait_ack(lcd, base_data); 172 lcdtg_i2c_send_stop(lcd, base_data); 173} 174 175static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data) 176{ 177 struct spi_message msg; 178 struct spi_transfer xfer = { 179 .len = 1, 180 .cs_change = 1, 181 .tx_buf = lcd->buf, 182 }; 183 184 lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f); 185 spi_message_init(&msg); 186 spi_message_add_tail(&xfer, &msg); 187 188 return spi_sync(lcd->spi_dev, &msg); 189} 190 191/* Set Phase Adjust */ 192static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode) 193{ 194 int adj; 195 196 switch (mode) { 197 case CORGI_LCD_MODE_VGA: 198 /* Setting for VGA */ 199 adj = sharpsl_param.phadadj; 200 adj = (adj < 0) ? PHACTRL_PHASE_MANUAL : 201 PHACTRL_PHASE_MANUAL | ((adj & 0xf) << 1); 202 break; 203 case CORGI_LCD_MODE_QVGA: 204 default: 205 /* Setting for QVGA */ 206 adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL; 207 break; 208 } 209 210 corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj); 211} 212 213static void corgi_lcd_power_on(struct corgi_lcd *lcd) 214{ 215 int comadj; 216 217 /* Initialize Internal Logic & Port */ 218 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 219 PICTRL_POWER_DOWN | PICTRL_INIOFF | 220 PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF | 221 PICTRL_DAC_SIGNAL_OFF); 222 223 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 224 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF | 225 POWER0_COM_OFF | POWER0_VCC5_OFF); 226 227 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 228 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF); 229 230 /* VDD(+8V), SVSS(-4V) ON */ 231 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 232 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON); 233 mdelay(3); 234 235 /* DAC ON */ 236 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 237 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | 238 POWER0_COM_OFF | POWER0_VCC5_OFF); 239 240 /* INIB = H, INI = L */ 241 /* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */ 242 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 243 PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF); 244 245 /* Set Common Voltage */ 246 comadj = sharpsl_param.comadj; 247 if (comadj < 0) 248 comadj = DEFAULT_COMADJ; 249 250 lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF | 251 POWER0_VCC5_OFF, comadj); 252 253 /* VCC5 ON, DAC ON */ 254 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 255 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | 256 POWER0_COM_OFF | POWER0_VCC5_ON); 257 258 /* GVSS(-8V) ON, VDD ON */ 259 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 260 POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON); 261 mdelay(2); 262 263 /* COM SIGNAL ON (PICTL[3] = L) */ 264 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE); 265 266 /* COM ON, DAC ON, VCC5_ON */ 267 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 268 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | 269 POWER0_COM_ON | POWER0_VCC5_ON); 270 271 /* VW ON, GVSS ON, VDD ON */ 272 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 273 POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON); 274 275 /* Signals output enable */ 276 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0); 277 278 /* Set Phase Adjust */ 279 lcdtg_set_phadadj(lcd, lcd->mode); 280 281 /* Initialize for Input Signals from ATI */ 282 corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS, 283 POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE | 284 POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L | 285 POLCTRL_EN_ACT_H); 286 udelay(1000); 287 288 switch (lcd->mode) { 289 case CORGI_LCD_MODE_VGA: 290 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA); 291 break; 292 case CORGI_LCD_MODE_QVGA: 293 default: 294 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA); 295 break; 296 } 297} 298 299static void corgi_lcd_power_off(struct corgi_lcd *lcd) 300{ 301 /* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */ 302 msleep(34); 303 304 /* (1)VW OFF */ 305 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 306 POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON); 307 308 /* (2)COM OFF */ 309 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF); 310 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 311 POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON); 312 313 /* (3)Set Common Voltage Bias 0V */ 314 lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF | 315 POWER0_VCC5_ON, 0); 316 317 /* (4)GVSS OFF */ 318 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 319 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON); 320 321 /* (5)VCC5 OFF */ 322 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 323 POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF); 324 325 /* (6)Set PDWN, INIOFF, DACOFF */ 326 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 327 PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF | 328 PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF); 329 330 /* (7)DAC OFF */ 331 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, 332 POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF); 333 334 /* (8)VDD OFF */ 335 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, 336 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF); 337} 338 339static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m) 340{ 341 struct corgi_lcd *lcd = lcd_get_data(ld); 342 int mode = CORGI_LCD_MODE_QVGA; 343 344 if (m->xres == 640 || m->xres == 480) 345 mode = CORGI_LCD_MODE_VGA; 346 347 if (lcd->mode == mode) 348 return 0; 349 350 lcdtg_set_phadadj(lcd, mode); 351 352 switch (mode) { 353 case CORGI_LCD_MODE_VGA: 354 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA); 355 break; 356 case CORGI_LCD_MODE_QVGA: 357 default: 358 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA); 359 break; 360 } 361 362 lcd->mode = mode; 363 return 0; 364} 365 366static int corgi_lcd_set_power(struct lcd_device *ld, int power) 367{ 368 struct corgi_lcd *lcd = lcd_get_data(ld); 369 370 if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) 371 corgi_lcd_power_on(lcd); 372 373 if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) 374 corgi_lcd_power_off(lcd); 375 376 lcd->power = power; 377 return 0; 378} 379 380static int corgi_lcd_get_power(struct lcd_device *ld) 381{ 382 struct corgi_lcd *lcd = lcd_get_data(ld); 383 384 return lcd->power; 385} 386 387static struct lcd_ops corgi_lcd_ops = { 388 .get_power = corgi_lcd_get_power, 389 .set_power = corgi_lcd_set_power, 390 .set_mode = corgi_lcd_set_mode, 391}; 392 393static int corgi_bl_get_intensity(struct backlight_device *bd) 394{ 395 struct corgi_lcd *lcd = bl_get_data(bd); 396 397 return lcd->intensity; 398} 399 400static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity) 401{ 402 int cont; 403 404 if (intensity > 0x10) 405 intensity += 0x10; 406 407 corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity); 408 409 /* Bit 5 via GPIO_BACKLIGHT_CONT */ 410 cont = !!(intensity & 0x20) ^ lcd->gpio_backlight_cont_inverted; 411 412 if (gpio_is_valid(lcd->gpio_backlight_cont)) 413 gpio_set_value_cansleep(lcd->gpio_backlight_cont, cont); 414 415 if (gpio_is_valid(lcd->gpio_backlight_on)) 416 gpio_set_value_cansleep(lcd->gpio_backlight_on, intensity); 417 418 if (lcd->kick_battery) 419 lcd->kick_battery(); 420 421 lcd->intensity = intensity; 422 return 0; 423} 424 425static int corgi_bl_update_status(struct backlight_device *bd) 426{ 427 struct corgi_lcd *lcd = bl_get_data(bd); 428 int intensity = bd->props.brightness; 429 430 if (bd->props.power != FB_BLANK_UNBLANK) 431 intensity = 0; 432 433 if (bd->props.fb_blank != FB_BLANK_UNBLANK) 434 intensity = 0; 435 436 if (corgibl_flags & CORGIBL_SUSPENDED) 437 intensity = 0; 438 439 if ((corgibl_flags & CORGIBL_BATTLOW) && intensity > lcd->limit_mask) 440 intensity = lcd->limit_mask; 441 442 return corgi_bl_set_intensity(lcd, intensity); 443} 444 445void corgi_lcd_limit_intensity(int limit) 446{ 447 if (limit) 448 corgibl_flags |= CORGIBL_BATTLOW; 449 else 450 corgibl_flags &= ~CORGIBL_BATTLOW; 451 452 backlight_update_status(the_corgi_lcd->bl_dev); 453} 454EXPORT_SYMBOL(corgi_lcd_limit_intensity); 455 456static const struct backlight_ops corgi_bl_ops = { 457 .get_brightness = corgi_bl_get_intensity, 458 .update_status = corgi_bl_update_status, 459}; 460 461#ifdef CONFIG_PM_SLEEP 462static int corgi_lcd_suspend(struct device *dev) 463{ 464 struct corgi_lcd *lcd = dev_get_drvdata(dev); 465 466 corgibl_flags |= CORGIBL_SUSPENDED; 467 corgi_bl_set_intensity(lcd, 0); 468 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); 469 return 0; 470} 471 472static int corgi_lcd_resume(struct device *dev) 473{ 474 struct corgi_lcd *lcd = dev_get_drvdata(dev); 475 476 corgibl_flags &= ~CORGIBL_SUSPENDED; 477 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); 478 backlight_update_status(lcd->bl_dev); 479 return 0; 480} 481#endif 482 483static SIMPLE_DEV_PM_OPS(corgi_lcd_pm_ops, corgi_lcd_suspend, corgi_lcd_resume); 484 485static int setup_gpio_backlight(struct corgi_lcd *lcd, 486 struct corgi_lcd_platform_data *pdata) 487{ 488 struct spi_device *spi = lcd->spi_dev; 489 int err; 490 491 lcd->gpio_backlight_on = -1; 492 lcd->gpio_backlight_cont = -1; 493 494 if (gpio_is_valid(pdata->gpio_backlight_on)) { 495 err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_on, 496 "BL_ON"); 497 if (err) { 498 dev_err(&spi->dev, 499 "failed to request GPIO%d for backlight_on\n", 500 pdata->gpio_backlight_on); 501 return err; 502 } 503 504 lcd->gpio_backlight_on = pdata->gpio_backlight_on; 505 gpio_direction_output(lcd->gpio_backlight_on, 0); 506 } 507 508 if (gpio_is_valid(pdata->gpio_backlight_cont)) { 509 err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_cont, 510 "BL_CONT"); 511 if (err) { 512 dev_err(&spi->dev, 513 "failed to request GPIO%d for backlight_cont\n", 514 pdata->gpio_backlight_cont); 515 return err; 516 } 517 518 lcd->gpio_backlight_cont = pdata->gpio_backlight_cont; 519 520 /* spitz and akita use both GPIOs for backlight, and 521 * have inverted polarity of GPIO_BACKLIGHT_CONT 522 */ 523 if (gpio_is_valid(lcd->gpio_backlight_on)) { 524 lcd->gpio_backlight_cont_inverted = 1; 525 gpio_direction_output(lcd->gpio_backlight_cont, 1); 526 } else { 527 lcd->gpio_backlight_cont_inverted = 0; 528 gpio_direction_output(lcd->gpio_backlight_cont, 0); 529 } 530 } 531 return 0; 532} 533 534static int corgi_lcd_probe(struct spi_device *spi) 535{ 536 struct backlight_properties props; 537 struct corgi_lcd_platform_data *pdata = dev_get_platdata(&spi->dev); 538 struct corgi_lcd *lcd; 539 int ret = 0; 540 541 if (pdata == NULL) { 542 dev_err(&spi->dev, "platform data not available\n"); 543 return -EINVAL; 544 } 545 546 lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL); 547 if (!lcd) 548 return -ENOMEM; 549 550 lcd->spi_dev = spi; 551 552 lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "corgi_lcd", 553 &spi->dev, lcd, &corgi_lcd_ops); 554 if (IS_ERR(lcd->lcd_dev)) 555 return PTR_ERR(lcd->lcd_dev); 556 557 lcd->power = FB_BLANK_POWERDOWN; 558 lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA; 559 560 memset(&props, 0, sizeof(struct backlight_properties)); 561 props.type = BACKLIGHT_RAW; 562 props.max_brightness = pdata->max_intensity; 563 lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl", 564 &spi->dev, lcd, &corgi_bl_ops, 565 &props); 566 if (IS_ERR(lcd->bl_dev)) 567 return PTR_ERR(lcd->bl_dev); 568 569 lcd->bl_dev->props.brightness = pdata->default_intensity; 570 lcd->bl_dev->props.power = FB_BLANK_UNBLANK; 571 572 ret = setup_gpio_backlight(lcd, pdata); 573 if (ret) 574 return ret; 575 576 lcd->kick_battery = pdata->kick_battery; 577 578 spi_set_drvdata(spi, lcd); 579 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); 580 backlight_update_status(lcd->bl_dev); 581 582 lcd->limit_mask = pdata->limit_mask; 583 the_corgi_lcd = lcd; 584 return 0; 585} 586 587static int corgi_lcd_remove(struct spi_device *spi) 588{ 589 struct corgi_lcd *lcd = spi_get_drvdata(spi); 590 591 lcd->bl_dev->props.power = FB_BLANK_UNBLANK; 592 lcd->bl_dev->props.brightness = 0; 593 backlight_update_status(lcd->bl_dev); 594 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); 595 return 0; 596} 597 598static struct spi_driver corgi_lcd_driver = { 599 .driver = { 600 .name = "corgi-lcd", 601 .owner = THIS_MODULE, 602 .pm = &corgi_lcd_pm_ops, 603 }, 604 .probe = corgi_lcd_probe, 605 .remove = corgi_lcd_remove, 606}; 607 608module_spi_driver(corgi_lcd_driver); 609 610MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00"); 611MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); 612MODULE_LICENSE("GPL"); 613MODULE_ALIAS("spi:corgi-lcd"); 614