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