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 psuedo 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 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 155static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base) 156{ 157 lcdtg_i2c_send_bit(lcd, base); 158} 159 160static 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 174static 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 */ 191static 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 212static 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 298static 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 338static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m) 339{ 340 struct corgi_lcd *lcd = dev_get_drvdata(&ld->dev); 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 365static int corgi_lcd_set_power(struct lcd_device *ld, int power) 366{ 367 struct corgi_lcd *lcd = dev_get_drvdata(&ld->dev); 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 379static int corgi_lcd_get_power(struct lcd_device *ld) 380{ 381 struct corgi_lcd *lcd = dev_get_drvdata(&ld->dev); 382 383 return lcd->power; 384} 385 386static 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 392static int corgi_bl_get_intensity(struct backlight_device *bd) 393{ 394 struct corgi_lcd *lcd = dev_get_drvdata(&bd->dev); 395 396 return lcd->intensity; 397} 398 399static 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(lcd->gpio_backlight_cont, cont); 413 414 if (gpio_is_valid(lcd->gpio_backlight_on)) 415 gpio_set_value(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 424static int corgi_bl_update_status(struct backlight_device *bd) 425{ 426 struct corgi_lcd *lcd = dev_get_drvdata(&bd->dev); 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 444void 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} 453EXPORT_SYMBOL(corgi_lcd_limit_intensity); 454 455static 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 461static int corgi_lcd_suspend(struct spi_device *spi, pm_message_t state) 462{ 463 struct corgi_lcd *lcd = dev_get_drvdata(&spi->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 471static int corgi_lcd_resume(struct spi_device *spi) 472{ 473 struct corgi_lcd *lcd = dev_get_drvdata(&spi->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#else 481#define corgi_lcd_suspend NULL 482#define corgi_lcd_resume NULL 483#endif 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 = gpio_request(pdata->gpio_backlight_on, "BL_ON"); 496 if (err) { 497 dev_err(&spi->dev, "failed to request GPIO%d for " 498 "backlight_on\n", pdata->gpio_backlight_on); 499 return err; 500 } 501 502 lcd->gpio_backlight_on = pdata->gpio_backlight_on; 503 gpio_direction_output(lcd->gpio_backlight_on, 0); 504 } 505 506 if (gpio_is_valid(pdata->gpio_backlight_cont)) { 507 err = gpio_request(pdata->gpio_backlight_cont, "BL_CONT"); 508 if (err) { 509 dev_err(&spi->dev, "failed to request GPIO%d for " 510 "backlight_cont\n", pdata->gpio_backlight_cont); 511 goto err_free_backlight_on; 512 } 513 514 lcd->gpio_backlight_cont = pdata->gpio_backlight_cont; 515 516 /* spitz and akita use both GPIOs for backlight, and 517 * have inverted polarity of GPIO_BACKLIGHT_CONT 518 */ 519 if (gpio_is_valid(lcd->gpio_backlight_on)) { 520 lcd->gpio_backlight_cont_inverted = 1; 521 gpio_direction_output(lcd->gpio_backlight_cont, 1); 522 } else { 523 lcd->gpio_backlight_cont_inverted = 0; 524 gpio_direction_output(lcd->gpio_backlight_cont, 0); 525 } 526 } 527 return 0; 528 529err_free_backlight_on: 530 if (gpio_is_valid(lcd->gpio_backlight_on)) 531 gpio_free(lcd->gpio_backlight_on); 532 return err; 533} 534 535static int __devinit corgi_lcd_probe(struct spi_device *spi) 536{ 537 struct backlight_properties props; 538 struct corgi_lcd_platform_data *pdata = spi->dev.platform_data; 539 struct corgi_lcd *lcd; 540 int ret = 0; 541 542 if (pdata == NULL) { 543 dev_err(&spi->dev, "platform data not available\n"); 544 return -EINVAL; 545 } 546 547 lcd = kzalloc(sizeof(struct corgi_lcd), GFP_KERNEL); 548 if (!lcd) { 549 dev_err(&spi->dev, "failed to allocate memory\n"); 550 return -ENOMEM; 551 } 552 553 lcd->spi_dev = spi; 554 555 lcd->lcd_dev = lcd_device_register("corgi_lcd", &spi->dev, 556 lcd, &corgi_lcd_ops); 557 if (IS_ERR(lcd->lcd_dev)) { 558 ret = PTR_ERR(lcd->lcd_dev); 559 goto err_free_lcd; 560 } 561 lcd->power = FB_BLANK_POWERDOWN; 562 lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA; 563 564 memset(&props, 0, sizeof(struct backlight_properties)); 565 props.max_brightness = pdata->max_intensity; 566 lcd->bl_dev = backlight_device_register("corgi_bl", &spi->dev, lcd, 567 &corgi_bl_ops, &props); 568 if (IS_ERR(lcd->bl_dev)) { 569 ret = PTR_ERR(lcd->bl_dev); 570 goto err_unregister_lcd; 571 } 572 lcd->bl_dev->props.brightness = pdata->default_intensity; 573 lcd->bl_dev->props.power = FB_BLANK_UNBLANK; 574 575 ret = setup_gpio_backlight(lcd, pdata); 576 if (ret) 577 goto err_unregister_bl; 578 579 lcd->kick_battery = pdata->kick_battery; 580 581 dev_set_drvdata(&spi->dev, lcd); 582 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); 583 backlight_update_status(lcd->bl_dev); 584 585 lcd->limit_mask = pdata->limit_mask; 586 the_corgi_lcd = lcd; 587 return 0; 588 589err_unregister_bl: 590 backlight_device_unregister(lcd->bl_dev); 591err_unregister_lcd: 592 lcd_device_unregister(lcd->lcd_dev); 593err_free_lcd: 594 kfree(lcd); 595 return ret; 596} 597 598static int __devexit corgi_lcd_remove(struct spi_device *spi) 599{ 600 struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev); 601 602 lcd->bl_dev->props.power = FB_BLANK_UNBLANK; 603 lcd->bl_dev->props.brightness = 0; 604 backlight_update_status(lcd->bl_dev); 605 backlight_device_unregister(lcd->bl_dev); 606 607 if (gpio_is_valid(lcd->gpio_backlight_on)) 608 gpio_free(lcd->gpio_backlight_on); 609 610 if (gpio_is_valid(lcd->gpio_backlight_cont)) 611 gpio_free(lcd->gpio_backlight_cont); 612 613 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); 614 lcd_device_unregister(lcd->lcd_dev); 615 kfree(lcd); 616 617 return 0; 618} 619 620static struct spi_driver corgi_lcd_driver = { 621 .driver = { 622 .name = "corgi-lcd", 623 .owner = THIS_MODULE, 624 }, 625 .probe = corgi_lcd_probe, 626 .remove = __devexit_p(corgi_lcd_remove), 627 .suspend = corgi_lcd_suspend, 628 .resume = corgi_lcd_resume, 629}; 630 631static int __init corgi_lcd_init(void) 632{ 633 return spi_register_driver(&corgi_lcd_driver); 634} 635module_init(corgi_lcd_init); 636 637static void __exit corgi_lcd_exit(void) 638{ 639 spi_unregister_driver(&corgi_lcd_driver); 640} 641module_exit(corgi_lcd_exit); 642 643MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00"); 644MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); 645MODULE_LICENSE("GPL"); 646MODULE_ALIAS("spi:corgi-lcd"); 647