drivers/video/backlight/corgi_lcd.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  LCD/Backlight Driver for Sharp Zaurus Handhelds (various models)
   4  *
   5  *  Copyright (c) 2004-2006 Richard Purdie
   6  *
   7  *  Based on Sharp's 2.4 Backlight Driver
   8  *
   9  *  Copyright (c) 2008 Marvell International Ltd.
  10  *      Converted to SPI device based LCD/Backlight device driver
  11  *      by Eric Miao <eric.miao@marvell.com>
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/gpio/consumer.h>
  19 #include <linux/fb.h>
  20 #include <linux/lcd.h>
  21 #include <linux/spi/spi.h>
  22 #include <linux/spi/corgi_lcd.h>
  23 #include <linux/slab.h>
  24 #include <asm/mach/sharpsl_param.h>
  25
  26 #define POWER_IS_ON(pwr)        ((pwr) <= FB_BLANK_NORMAL)
  27
  28 /* Register Addresses */
  29 #define RESCTL_ADRS     0x00
  30 #define PHACTRL_ADRS    0x01
  31 #define DUTYCTRL_ADRS   0x02
  32 #define POWERREG0_ADRS  0x03
  33 #define POWERREG1_ADRS  0x04
  34 #define GPOR3_ADRS      0x05
  35 #define PICTRL_ADRS     0x06
  36 #define POLCTRL_ADRS    0x07
  37
  38 /* Register Bit Definitions */
  39 #define RESCTL_QVGA     0x01
  40 #define RESCTL_VGA      0x00
  41
  42 #define POWER1_VW_ON    0x01  /* VW Supply FET ON */
  43 #define POWER1_GVSS_ON  0x02  /* GVSS(-8V) Power Supply ON */
  44 #define POWER1_VDD_ON   0x04  /* VDD(8V),SVSS(-4V) Power Supply ON */
  45
  46 #define POWER1_VW_OFF   0x00  /* VW Supply FET OFF */
  47 #define POWER1_GVSS_OFF 0x00  /* GVSS(-8V) Power Supply OFF */
  48 #define POWER1_VDD_OFF  0x00  /* VDD(8V),SVSS(-4V) Power Supply OFF */
  49
  50 #define POWER0_COM_DCLK 0x01  /* COM Voltage DC Bias DAC Serial Data Clock */
  51 #define POWER0_COM_DOUT 0x02  /* COM Voltage DC Bias DAC Serial Data Out */
  52 #define POWER0_DAC_ON   0x04  /* DAC Power Supply ON */
  53 #define POWER0_COM_ON   0x08  /* COM Power Supply ON */
  54 #define POWER0_VCC5_ON  0x10  /* VCC5 Power Supply ON */
  55
  56 #define POWER0_DAC_OFF  0x00  /* DAC Power Supply OFF */
  57 #define POWER0_COM_OFF  0x00  /* COM Power Supply OFF */
  58 #define POWER0_VCC5_OFF 0x00  /* VCC5 Power Supply OFF */
  59
  60 #define PICTRL_INIT_STATE      0x01
  61 #define PICTRL_INIOFF          0x02
  62 #define PICTRL_POWER_DOWN      0x04
  63 #define PICTRL_COM_SIGNAL_OFF  0x08
  64 #define PICTRL_DAC_SIGNAL_OFF  0x10
  65
  66 #define POLCTRL_SYNC_POL_FALL  0x01
  67 #define POLCTRL_EN_POL_FALL    0x02
  68 #define POLCTRL_DATA_POL_FALL  0x04
  69 #define POLCTRL_SYNC_ACT_H     0x08
  70 #define POLCTRL_EN_ACT_L       0x10
  71
  72 #define POLCTRL_SYNC_POL_RISE  0x00
  73 #define POLCTRL_EN_POL_RISE    0x00
  74 #define POLCTRL_DATA_POL_RISE  0x00
  75 #define POLCTRL_SYNC_ACT_L     0x00
  76 #define POLCTRL_EN_ACT_H       0x00
  77
  78 #define PHACTRL_PHASE_MANUAL   0x01
  79 #define DEFAULT_PHAD_QVGA     (9)
  80 #define DEFAULT_COMADJ        (125)
  81
  82 struct corgi_lcd {
  83         struct spi_device       *spi_dev;
  84         struct lcd_device       *lcd_dev;
  85         struct backlight_device *bl_dev;
  86
  87         int     limit_mask;
  88         int     intensity;
  89         int     power;
  90         int     mode;
  91         char    buf[2];
  92
  93         struct gpio_desc *backlight_on;
  94         struct gpio_desc *backlight_cont;
  95
  96         void (*kick_battery)(void);
  97 };
  98
  99 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val);
 100
 101 static struct corgi_lcd *the_corgi_lcd;
 102 static unsigned long corgibl_flags;
 103 #define CORGIBL_SUSPENDED     0x01
 104 #define CORGIBL_BATTLOW       0x02
 105
 106 /*
 107  * This is only a pseudo I2C interface. We can't use the standard kernel
 108  * routines as the interface is write only. We just assume the data is acked...
 109  */
 110 static void lcdtg_ssp_i2c_send(struct corgi_lcd *lcd, uint8_t data)
 111 {
 112         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, data);
 113         udelay(10);
 114 }
 115
 116 static void lcdtg_i2c_send_bit(struct corgi_lcd *lcd, uint8_t data)
 117 {
 118         lcdtg_ssp_i2c_send(lcd, data);
 119         lcdtg_ssp_i2c_send(lcd, data | POWER0_COM_DCLK);
 120         lcdtg_ssp_i2c_send(lcd, data);
 121 }
 122
 123 static void lcdtg_i2c_send_start(struct corgi_lcd *lcd, uint8_t base)
 124 {
 125         lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);
 126         lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);
 127         lcdtg_ssp_i2c_send(lcd, base);
 128 }
 129
 130 static void lcdtg_i2c_send_stop(struct corgi_lcd *lcd, uint8_t base)
 131 {
 132         lcdtg_ssp_i2c_send(lcd, base);
 133         lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);
 134         lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);
 135 }
 136
 137 static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd,
 138                                 uint8_t base, uint8_t data)
 139 {
 140         int i;
 141
 142         for (i = 0; i < 8; i++) {
 143                 if (data & 0x80)
 144                         lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT);
 145                 else
 146                         lcdtg_i2c_send_bit(lcd, base);
 147                 data <<= 1;
 148         }
 149 }
 150
 151 static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base)
 152 {
 153         lcdtg_i2c_send_bit(lcd, base);
 154 }
 155
 156 static void lcdtg_set_common_voltage(struct corgi_lcd *lcd,
 157                                      uint8_t base_data, uint8_t data)
 158 {
 159         /* Set Common Voltage to M62332FP via I2C */
 160         lcdtg_i2c_send_start(lcd, base_data);
 161         lcdtg_i2c_send_byte(lcd, base_data, 0x9c);
 162         lcdtg_i2c_wait_ack(lcd, base_data);
 163         lcdtg_i2c_send_byte(lcd, base_data, 0x00);
 164         lcdtg_i2c_wait_ack(lcd, base_data);
 165         lcdtg_i2c_send_byte(lcd, base_data, data);
 166         lcdtg_i2c_wait_ack(lcd, base_data);
 167         lcdtg_i2c_send_stop(lcd, base_data);
 168 }
 169
 170 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data)
 171 {
 172         struct spi_message msg;
 173         struct spi_transfer xfer = {
 174                 .len            = 1,
 175                 .cs_change      = 0,
 176                 .tx_buf         = lcd->buf,
 177         };
 178
 179         lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);
 180         spi_message_init(&msg);
 181         spi_message_add_tail(&xfer, &msg);
 182
 183         return spi_sync(lcd->spi_dev, &msg);
 184 }
 185
 186 /* Set Phase Adjust */
 187 static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode)
 188 {
 189         int adj;
 190
 191         switch (mode) {
 192         case CORGI_LCD_MODE_VGA:
 193                 /* Setting for VGA */
 194                 adj = sharpsl_param.phadadj;
 195                 adj = (adj < 0) ? PHACTRL_PHASE_MANUAL :
 196                                   PHACTRL_PHASE_MANUAL | ((adj & 0xf) << 1);
 197                 break;
 198         case CORGI_LCD_MODE_QVGA:
 199         default:
 200                 /* Setting for QVGA */
 201                 adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL;
 202                 break;
 203         }
 204
 205         corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj);
 206 }
 207
 208 static void corgi_lcd_power_on(struct corgi_lcd *lcd)
 209 {
 210         int comadj;
 211
 212         /* Initialize Internal Logic & Port */
 213         corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,
 214                         PICTRL_POWER_DOWN | PICTRL_INIOFF |
 215                         PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF |
 216                         PICTRL_DAC_SIGNAL_OFF);
 217
 218         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 219                         POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF |
 220                         POWER0_COM_OFF | POWER0_VCC5_OFF);
 221
 222         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 223                         POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
 224
 225         /* VDD(+8V), SVSS(-4V) ON */
 226         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 227                         POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
 228         mdelay(3);
 229
 230         /* DAC ON */
 231         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 232                         POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
 233                         POWER0_COM_OFF | POWER0_VCC5_OFF);
 234
 235         /* INIB = H, INI = L  */
 236         /* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */
 237         corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,
 238                         PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF);
 239
 240         /* Set Common Voltage */
 241         comadj = sharpsl_param.comadj;
 242         if (comadj < 0)
 243                 comadj = DEFAULT_COMADJ;
 244
 245         lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |
 246                                  POWER0_VCC5_OFF, comadj);
 247
 248         /* VCC5 ON, DAC ON */
 249         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 250                         POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
 251                         POWER0_COM_OFF | POWER0_VCC5_ON);
 252
 253         /* GVSS(-8V) ON, VDD ON */
 254         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 255                         POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
 256         mdelay(2);
 257
 258         /* COM SIGNAL ON (PICTL[3] = L) */
 259         corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE);
 260
 261         /* COM ON, DAC ON, VCC5_ON */
 262         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 263                         POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
 264                         POWER0_COM_ON | POWER0_VCC5_ON);
 265
 266         /* VW ON, GVSS ON, VDD ON */
 267         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 268                         POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON);
 269
 270         /* Signals output enable */
 271         corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0);
 272
 273         /* Set Phase Adjust */
 274         lcdtg_set_phadadj(lcd, lcd->mode);
 275
 276         /* Initialize for Input Signals from ATI */
 277         corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS,
 278                         POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE |
 279                         POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L |
 280                         POLCTRL_EN_ACT_H);
 281         udelay(1000);
 282
 283         switch (lcd->mode) {
 284         case CORGI_LCD_MODE_VGA:
 285                 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);
 286                 break;
 287         case CORGI_LCD_MODE_QVGA:
 288         default:
 289                 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);
 290                 break;
 291         }
 292 }
 293
 294 static void corgi_lcd_power_off(struct corgi_lcd *lcd)
 295 {
 296         /* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */
 297         msleep(34);
 298
 299         /* (1)VW OFF */
 300         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 301                         POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
 302
 303         /* (2)COM OFF */
 304         corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF);
 305         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 306                         POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON);
 307
 308         /* (3)Set Common Voltage Bias 0V */
 309         lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |
 310                         POWER0_VCC5_ON, 0);
 311
 312         /* (4)GVSS OFF */
 313         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 314                         POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
 315
 316         /* (5)VCC5 OFF */
 317         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 318                         POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF);
 319
 320         /* (6)Set PDWN, INIOFF, DACOFF */
 321         corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,
 322                         PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF |
 323                         PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF);
 324
 325         /* (7)DAC OFF */
 326         corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
 327                         POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF);
 328
 329         /* (8)VDD OFF */
 330         corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
 331                         POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
 332 }
 333
 334 static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m)
 335 {
 336         struct corgi_lcd *lcd = lcd_get_data(ld);
 337         int mode = CORGI_LCD_MODE_QVGA;
 338
 339         if (m->xres == 640 || m->xres == 480)
 340                 mode = CORGI_LCD_MODE_VGA;
 341
 342         if (lcd->mode == mode)
 343                 return 0;
 344
 345         lcdtg_set_phadadj(lcd, mode);
 346
 347         switch (mode) {
 348         case CORGI_LCD_MODE_VGA:
 349                 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);
 350                 break;
 351         case CORGI_LCD_MODE_QVGA:
 352         default:
 353                 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);
 354                 break;
 355         }
 356
 357         lcd->mode = mode;
 358         return 0;
 359 }
 360
 361 static int corgi_lcd_set_power(struct lcd_device *ld, int power)
 362 {
 363         struct corgi_lcd *lcd = lcd_get_data(ld);
 364
 365         if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
 366                 corgi_lcd_power_on(lcd);
 367
 368         if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
 369                 corgi_lcd_power_off(lcd);
 370
 371         lcd->power = power;
 372         return 0;
 373 }
 374
 375 static int corgi_lcd_get_power(struct lcd_device *ld)
 376 {
 377         struct corgi_lcd *lcd = lcd_get_data(ld);
 378
 379         return lcd->power;
 380 }
 381
 382 static struct lcd_ops corgi_lcd_ops = {
 383         .get_power      = corgi_lcd_get_power,
 384         .set_power      = corgi_lcd_set_power,
 385         .set_mode       = corgi_lcd_set_mode,
 386 };
 387
 388 static int corgi_bl_get_intensity(struct backlight_device *bd)
 389 {
 390         struct corgi_lcd *lcd = bl_get_data(bd);
 391
 392         return lcd->intensity;
 393 }
 394
 395 static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity)
 396 {
 397         int cont;
 398
 399         if (intensity > 0x10)
 400                 intensity += 0x10;
 401
 402         corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity);
 403
 404         /* Bit 5 via GPIO_BACKLIGHT_CONT */
 405         cont = !!(intensity & 0x20);
 406
 407         if (lcd->backlight_cont)
 408                 gpiod_set_value_cansleep(lcd->backlight_cont, cont);
 409
 410         if (lcd->backlight_on)
 411                 gpiod_set_value_cansleep(lcd->backlight_on, intensity);
 412
 413         if (lcd->kick_battery)
 414                 lcd->kick_battery();
 415
 416         lcd->intensity = intensity;
 417         return 0;
 418 }
 419
 420 static int corgi_bl_update_status(struct backlight_device *bd)
 421 {
 422         struct corgi_lcd *lcd = bl_get_data(bd);
 423         int intensity = backlight_get_brightness(bd);
 424
 425         if (corgibl_flags & CORGIBL_SUSPENDED)
 426                 intensity = 0;
 427
 428         if ((corgibl_flags & CORGIBL_BATTLOW) && intensity > lcd->limit_mask)
 429                 intensity = lcd->limit_mask;
 430
 431         return corgi_bl_set_intensity(lcd, intensity);
 432 }
 433
 434 void corgi_lcd_limit_intensity(int limit)
 435 {
 436         if (limit)
 437                 corgibl_flags |= CORGIBL_BATTLOW;
 438         else
 439                 corgibl_flags &= ~CORGIBL_BATTLOW;
 440
 441         backlight_update_status(the_corgi_lcd->bl_dev);
 442 }
 443 EXPORT_SYMBOL(corgi_lcd_limit_intensity);
 444
 445 static const struct backlight_ops corgi_bl_ops = {
 446         .get_brightness = corgi_bl_get_intensity,
 447         .update_status  = corgi_bl_update_status,
 448 };
 449
 450 #ifdef CONFIG_PM_SLEEP
 451 static int corgi_lcd_suspend(struct device *dev)
 452 {
 453         struct corgi_lcd *lcd = dev_get_drvdata(dev);
 454
 455         corgibl_flags |= CORGIBL_SUSPENDED;
 456         corgi_bl_set_intensity(lcd, 0);
 457         corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
 458         return 0;
 459 }
 460
 461 static int corgi_lcd_resume(struct device *dev)
 462 {
 463         struct corgi_lcd *lcd = dev_get_drvdata(dev);
 464
 465         corgibl_flags &= ~CORGIBL_SUSPENDED;
 466         corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
 467         backlight_update_status(lcd->bl_dev);
 468         return 0;
 469 }
 470 #endif
 471
 472 static SIMPLE_DEV_PM_OPS(corgi_lcd_pm_ops, corgi_lcd_suspend, corgi_lcd_resume);
 473
 474 static int setup_gpio_backlight(struct corgi_lcd *lcd,
 475                                 struct corgi_lcd_platform_data *pdata)
 476 {
 477         struct spi_device *spi = lcd->spi_dev;
 478
 479         lcd->backlight_on = devm_gpiod_get_optional(&spi->dev,
 480                                                     "BL_ON", GPIOD_OUT_LOW);
 481         if (IS_ERR(lcd->backlight_on))
 482                 return PTR_ERR(lcd->backlight_on);
 483
 484         lcd->backlight_cont = devm_gpiod_get_optional(&spi->dev, "BL_CONT",
 485                                                       GPIOD_OUT_LOW);
 486         if (IS_ERR(lcd->backlight_cont))
 487                 return PTR_ERR(lcd->backlight_cont);
 488
 489         return 0;
 490 }
 491
 492 static int corgi_lcd_probe(struct spi_device *spi)
 493 {
 494         struct backlight_properties props;
 495         struct corgi_lcd_platform_data *pdata = dev_get_platdata(&spi->dev);
 496         struct corgi_lcd *lcd;
 497         int ret = 0;
 498
 499         if (pdata == NULL) {
 500                 dev_err(&spi->dev, "platform data not available\n");
 501                 return -EINVAL;
 502         }
 503
 504         lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL);
 505         if (!lcd)
 506                 return -ENOMEM;
 507
 508         lcd->spi_dev = spi;
 509
 510         lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "corgi_lcd",
 511                                                 &spi->dev, lcd, &corgi_lcd_ops);
 512         if (IS_ERR(lcd->lcd_dev))
 513                 return PTR_ERR(lcd->lcd_dev);
 514
 515         lcd->power = FB_BLANK_POWERDOWN;
 516         lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;
 517
 518         memset(&props, 0, sizeof(struct backlight_properties));
 519         props.type = BACKLIGHT_RAW;
 520         props.max_brightness = pdata->max_intensity;
 521         lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl",
 522                                                 &spi->dev, lcd, &corgi_bl_ops,
 523                                                 &props);
 524         if (IS_ERR(lcd->bl_dev))
 525                 return PTR_ERR(lcd->bl_dev);
 526
 527         lcd->bl_dev->props.brightness = pdata->default_intensity;
 528         lcd->bl_dev->props.power = FB_BLANK_UNBLANK;
 529
 530         ret = setup_gpio_backlight(lcd, pdata);
 531         if (ret)
 532                 return ret;
 533
 534         lcd->kick_battery = pdata->kick_battery;
 535
 536         spi_set_drvdata(spi, lcd);
 537         corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
 538         backlight_update_status(lcd->bl_dev);
 539
 540         lcd->limit_mask = pdata->limit_mask;
 541         the_corgi_lcd = lcd;
 542         return 0;
 543 }
 544
 545 static int corgi_lcd_remove(struct spi_device *spi)
 546 {
 547         struct corgi_lcd *lcd = spi_get_drvdata(spi);
 548
 549         lcd->bl_dev->props.power = FB_BLANK_UNBLANK;
 550         lcd->bl_dev->props.brightness = 0;
 551         backlight_update_status(lcd->bl_dev);
 552         corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
 553         return 0;
 554 }
 555
 556 static struct spi_driver corgi_lcd_driver = {
 557         .driver         = {
 558                 .name   = "corgi-lcd",
 559                 .pm     = &corgi_lcd_pm_ops,
 560         },
 561         .probe          = corgi_lcd_probe,
 562         .remove         = corgi_lcd_remove,
 563 };
 564
 565 module_spi_driver(corgi_lcd_driver);
 566
 567 MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00");
 568 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
 569 MODULE_LICENSE("GPL");
 570 MODULE_ALIAS("spi:corgi-lcd");