tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ld9040 AMOLED LCD panel driver.
3 *
4 * Copyright (c) 2011 Samsung Electronics
5 * Author: Donghwa Lee <dh09.lee@samsung.com>
6 * Derived from drivers/video/backlight/s6e63m0.c
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 */
22
23#include <linux/wait.h>
24#include <linux/fb.h>
25#include <linux/delay.h>
26#include <linux/gpio.h>
27#include <linux/spi/spi.h>
28#include <linux/irq.h>
29#include <linux/interrupt.h>
30#include <linux/kernel.h>
31#include <linux/lcd.h>
32#include <linux/backlight.h>
33
34#include "ld9040_gamma.h"
35
36#define SLEEPMSEC 0x1000
37#define ENDDEF 0x2000
38#define DEFMASK 0xFF00
39#define COMMAND_ONLY 0xFE
40#define DATA_ONLY 0xFF
41
42#define MIN_BRIGHTNESS 0
43#define MAX_BRIGHTNESS 24
44#define power_is_on(pwr) ((pwr) <= FB_BLANK_NORMAL)
45
46struct ld9040 {
47 struct device *dev;
48 struct spi_device *spi;
49 unsigned int power;
50 unsigned int current_brightness;
51
52 struct lcd_device *ld;
53 struct backlight_device *bd;
54 struct lcd_platform_data *lcd_pd;
55};
56
57static const unsigned short seq_swreset[] = {
58 0x01, COMMAND_ONLY,
59 ENDDEF, 0x00
60};
61
62static const unsigned short seq_user_setting[] = {
63 0xF0, 0x5A,
64
65 DATA_ONLY, 0x5A,
66 ENDDEF, 0x00
67};
68
69static const unsigned short seq_elvss_on[] = {
70 0xB1, 0x0D,
71
72 DATA_ONLY, 0x00,
73 DATA_ONLY, 0x16,
74 ENDDEF, 0x00
75};
76
77static const unsigned short seq_gtcon[] = {
78 0xF7, 0x09,
79
80 DATA_ONLY, 0x00,
81 DATA_ONLY, 0x00,
82 ENDDEF, 0x00
83};
84
85static const unsigned short seq_panel_condition[] = {
86 0xF8, 0x05,
87
88 DATA_ONLY, 0x65,
89 DATA_ONLY, 0x96,
90 DATA_ONLY, 0x71,
91 DATA_ONLY, 0x7D,
92 DATA_ONLY, 0x19,
93 DATA_ONLY, 0x3B,
94 DATA_ONLY, 0x0D,
95 DATA_ONLY, 0x19,
96 DATA_ONLY, 0x7E,
97 DATA_ONLY, 0x0D,
98 DATA_ONLY, 0xE2,
99 DATA_ONLY, 0x00,
100 DATA_ONLY, 0x00,
101 DATA_ONLY, 0x7E,
102 DATA_ONLY, 0x7D,
103 DATA_ONLY, 0x07,
104 DATA_ONLY, 0x07,
105 DATA_ONLY, 0x20,
106 DATA_ONLY, 0x20,
107 DATA_ONLY, 0x20,
108 DATA_ONLY, 0x02,
109 DATA_ONLY, 0x02,
110 ENDDEF, 0x00
111};
112
113static const unsigned short seq_gamma_set1[] = {
114 0xF9, 0x00,
115
116 DATA_ONLY, 0xA7,
117 DATA_ONLY, 0xB4,
118 DATA_ONLY, 0xAE,
119 DATA_ONLY, 0xBF,
120 DATA_ONLY, 0x00,
121 DATA_ONLY, 0x91,
122 DATA_ONLY, 0x00,
123 DATA_ONLY, 0xB2,
124 DATA_ONLY, 0xB4,
125 DATA_ONLY, 0xAA,
126 DATA_ONLY, 0xBB,
127 DATA_ONLY, 0x00,
128 DATA_ONLY, 0xAC,
129 DATA_ONLY, 0x00,
130 DATA_ONLY, 0xB3,
131 DATA_ONLY, 0xB1,
132 DATA_ONLY, 0xAA,
133 DATA_ONLY, 0xBC,
134 DATA_ONLY, 0x00,
135 DATA_ONLY, 0xB3,
136 ENDDEF, 0x00
137};
138
139static const unsigned short seq_gamma_ctrl[] = {
140 0xFB, 0x02,
141
142 DATA_ONLY, 0x5A,
143 ENDDEF, 0x00
144};
145
146static const unsigned short seq_gamma_start[] = {
147 0xF9, COMMAND_ONLY,
148
149 ENDDEF, 0x00
150};
151
152static const unsigned short seq_apon[] = {
153 0xF3, 0x00,
154
155 DATA_ONLY, 0x00,
156 DATA_ONLY, 0x00,
157 DATA_ONLY, 0x0A,
158 DATA_ONLY, 0x02,
159 ENDDEF, 0x00
160};
161
162static const unsigned short seq_display_ctrl[] = {
163 0xF2, 0x02,
164
165 DATA_ONLY, 0x08,
166 DATA_ONLY, 0x08,
167 DATA_ONLY, 0x10,
168 DATA_ONLY, 0x10,
169 ENDDEF, 0x00
170};
171
172static const unsigned short seq_manual_pwr[] = {
173 0xB0, 0x04,
174 ENDDEF, 0x00
175};
176
177static const unsigned short seq_pwr_ctrl[] = {
178 0xF4, 0x0A,
179
180 DATA_ONLY, 0x87,
181 DATA_ONLY, 0x25,
182 DATA_ONLY, 0x6A,
183 DATA_ONLY, 0x44,
184 DATA_ONLY, 0x02,
185 DATA_ONLY, 0x88,
186 ENDDEF, 0x00
187};
188
189static const unsigned short seq_sleep_out[] = {
190 0x11, COMMAND_ONLY,
191 ENDDEF, 0x00
192};
193
194static const unsigned short seq_sleep_in[] = {
195 0x10, COMMAND_ONLY,
196 ENDDEF, 0x00
197};
198
199static const unsigned short seq_display_on[] = {
200 0x29, COMMAND_ONLY,
201 ENDDEF, 0x00
202};
203
204static const unsigned short seq_display_off[] = {
205 0x28, COMMAND_ONLY,
206 ENDDEF, 0x00
207};
208
209static const unsigned short seq_vci1_1st_en[] = {
210 0xF3, 0x10,
211
212 DATA_ONLY, 0x00,
213 DATA_ONLY, 0x00,
214 DATA_ONLY, 0x00,
215 DATA_ONLY, 0x02,
216 ENDDEF, 0x00
217};
218
219static const unsigned short seq_vl1_en[] = {
220 0xF3, 0x11,
221
222 DATA_ONLY, 0x00,
223 DATA_ONLY, 0x00,
224 DATA_ONLY, 0x00,
225 DATA_ONLY, 0x02,
226 ENDDEF, 0x00
227};
228
229static const unsigned short seq_vl2_en[] = {
230 0xF3, 0x13,
231
232 DATA_ONLY, 0x00,
233 DATA_ONLY, 0x00,
234 DATA_ONLY, 0x00,
235 DATA_ONLY, 0x02,
236 ENDDEF, 0x00
237};
238
239static const unsigned short seq_vci1_2nd_en[] = {
240 0xF3, 0x33,
241
242 DATA_ONLY, 0x00,
243 DATA_ONLY, 0x00,
244 DATA_ONLY, 0x00,
245 DATA_ONLY, 0x02,
246 ENDDEF, 0x00
247};
248
249static const unsigned short seq_vl3_en[] = {
250 0xF3, 0x37,
251
252 DATA_ONLY, 0x00,
253 DATA_ONLY, 0x00,
254 DATA_ONLY, 0x00,
255 DATA_ONLY, 0x02,
256 ENDDEF, 0x00
257};
258
259static const unsigned short seq_vreg1_amp_en[] = {
260 0xF3, 0x37,
261
262 DATA_ONLY, 0x01,
263 DATA_ONLY, 0x00,
264 DATA_ONLY, 0x00,
265 DATA_ONLY, 0x02,
266 ENDDEF, 0x00
267};
268
269static const unsigned short seq_vgh_amp_en[] = {
270 0xF3, 0x37,
271
272 DATA_ONLY, 0x11,
273 DATA_ONLY, 0x00,
274 DATA_ONLY, 0x00,
275 DATA_ONLY, 0x02,
276 ENDDEF, 0x00
277};
278
279static const unsigned short seq_vgl_amp_en[] = {
280 0xF3, 0x37,
281
282 DATA_ONLY, 0x31,
283 DATA_ONLY, 0x00,
284 DATA_ONLY, 0x00,
285 DATA_ONLY, 0x02,
286 ENDDEF, 0x00
287};
288
289static const unsigned short seq_vmos_amp_en[] = {
290 0xF3, 0x37,
291
292 DATA_ONLY, 0xB1,
293 DATA_ONLY, 0x00,
294 DATA_ONLY, 0x00,
295 DATA_ONLY, 0x03,
296 ENDDEF, 0x00
297};
298
299static const unsigned short seq_vint_amp_en[] = {
300 0xF3, 0x37,
301
302 DATA_ONLY, 0xF1,
303 /* DATA_ONLY, 0x71, VMOS/VBL/VBH not used */
304 DATA_ONLY, 0x00,
305 DATA_ONLY, 0x00,
306 DATA_ONLY, 0x03,
307 /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */
308 ENDDEF, 0x00
309};
310
311static const unsigned short seq_vbh_amp_en[] = {
312 0xF3, 0x37,
313
314 DATA_ONLY, 0xF9,
315 DATA_ONLY, 0x00,
316 DATA_ONLY, 0x00,
317 DATA_ONLY, 0x03,
318 ENDDEF, 0x00
319};
320
321static const unsigned short seq_vbl_amp_en[] = {
322 0xF3, 0x37,
323
324 DATA_ONLY, 0xFD,
325 DATA_ONLY, 0x00,
326 DATA_ONLY, 0x00,
327 DATA_ONLY, 0x03,
328 ENDDEF, 0x00
329};
330
331static const unsigned short seq_gam_amp_en[] = {
332 0xF3, 0x37,
333
334 DATA_ONLY, 0xFF,
335 /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */
336 DATA_ONLY, 0x00,
337 DATA_ONLY, 0x00,
338 DATA_ONLY, 0x03,
339 /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */
340 ENDDEF, 0x00
341};
342
343static const unsigned short seq_sd_amp_en[] = {
344 0xF3, 0x37,
345
346 DATA_ONLY, 0xFF,
347 /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */
348 DATA_ONLY, 0x80,
349 DATA_ONLY, 0x00,
350 DATA_ONLY, 0x03,
351 /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */
352 ENDDEF, 0x00
353};
354
355static const unsigned short seq_gls_en[] = {
356 0xF3, 0x37,
357
358 DATA_ONLY, 0xFF,
359 /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */
360 DATA_ONLY, 0x81,
361 DATA_ONLY, 0x00,
362 DATA_ONLY, 0x03,
363 /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */
364 ENDDEF, 0x00
365};
366
367static const unsigned short seq_els_en[] = {
368 0xF3, 0x37,
369
370 DATA_ONLY, 0xFF,
371 /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */
372 DATA_ONLY, 0x83,
373 DATA_ONLY, 0x00,
374 DATA_ONLY, 0x03,
375 /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */
376 ENDDEF, 0x00
377};
378
379static const unsigned short seq_el_on[] = {
380 0xF3, 0x37,
381
382 DATA_ONLY, 0xFF,
383 /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */
384 DATA_ONLY, 0x87,
385 DATA_ONLY, 0x00,
386 DATA_ONLY, 0x03,
387 /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */
388 ENDDEF, 0x00
389};
390
391static int ld9040_spi_write_byte(struct ld9040 *lcd, int addr, int data)
392{
393 u16 buf[1];
394 struct spi_message msg;
395
396 struct spi_transfer xfer = {
397 .len = 2,
398 .tx_buf = buf,
399 };
400
401 buf[0] = (addr << 8) | data;
402
403 spi_message_init(&msg);
404 spi_message_add_tail(&xfer, &msg);
405
406 return spi_sync(lcd->spi, &msg);
407}
408
409static int ld9040_spi_write(struct ld9040 *lcd, unsigned char address,
410 unsigned char command)
411{
412 int ret = 0;
413
414 if (address != DATA_ONLY)
415 ret = ld9040_spi_write_byte(lcd, 0x0, address);
416 if (command != COMMAND_ONLY)
417 ret = ld9040_spi_write_byte(lcd, 0x1, command);
418
419 return ret;
420}
421
422static int ld9040_panel_send_sequence(struct ld9040 *lcd,
423 const unsigned short *wbuf)
424{
425 int ret = 0, i = 0;
426
427 while ((wbuf[i] & DEFMASK) != ENDDEF) {
428 if ((wbuf[i] & DEFMASK) != SLEEPMSEC) {
429 ret = ld9040_spi_write(lcd, wbuf[i], wbuf[i+1]);
430 if (ret)
431 break;
432 } else
433 udelay(wbuf[i+1]*1000);
434 i += 2;
435 }
436
437 return ret;
438}
439
440static int _ld9040_gamma_ctl(struct ld9040 *lcd, const unsigned int *gamma)
441{
442 unsigned int i = 0;
443 int ret = 0;
444
445 /* start gamma table updating. */
446 ret = ld9040_panel_send_sequence(lcd, seq_gamma_start);
447 if (ret) {
448 dev_err(lcd->dev, "failed to disable gamma table updating.\n");
449 goto gamma_err;
450 }
451
452 for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) {
453 ret = ld9040_spi_write(lcd, DATA_ONLY, gamma[i]);
454 if (ret) {
455 dev_err(lcd->dev, "failed to set gamma table.\n");
456 goto gamma_err;
457 }
458 }
459
460 /* update gamma table. */
461 ret = ld9040_panel_send_sequence(lcd, seq_gamma_ctrl);
462 if (ret)
463 dev_err(lcd->dev, "failed to update gamma table.\n");
464
465gamma_err:
466 return ret;
467}
468
469static int ld9040_gamma_ctl(struct ld9040 *lcd, int gamma)
470{
471 int ret = 0;
472
473 ret = _ld9040_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]);
474
475 return ret;
476}
477
478
479static int ld9040_ldi_init(struct ld9040 *lcd)
480{
481 int ret, i;
482 static const unsigned short *init_seq[] = {
483 seq_user_setting,
484 seq_panel_condition,
485 seq_display_ctrl,
486 seq_manual_pwr,
487 seq_elvss_on,
488 seq_gtcon,
489 seq_gamma_set1,
490 seq_gamma_ctrl,
491 seq_sleep_out,
492 };
493
494 for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
495 ret = ld9040_panel_send_sequence(lcd, init_seq[i]);
496 /* workaround: minimum delay time for transferring CMD */
497 udelay(300);
498 if (ret)
499 break;
500 }
501
502 return ret;
503}
504
505static int ld9040_ldi_enable(struct ld9040 *lcd)
506{
507 int ret = 0;
508
509 ret = ld9040_panel_send_sequence(lcd, seq_display_on);
510
511 return ret;
512}
513
514static int ld9040_ldi_disable(struct ld9040 *lcd)
515{
516 int ret;
517
518 ret = ld9040_panel_send_sequence(lcd, seq_display_off);
519 ret = ld9040_panel_send_sequence(lcd, seq_sleep_in);
520
521 return ret;
522}
523
524static int ld9040_power_on(struct ld9040 *lcd)
525{
526 int ret = 0;
527 struct lcd_platform_data *pd = NULL;
528 pd = lcd->lcd_pd;
529 if (!pd) {
530 dev_err(lcd->dev, "platform data is NULL.\n");
531 return -EFAULT;
532 }
533
534 if (!pd->power_on) {
535 dev_err(lcd->dev, "power_on is NULL.\n");
536 return -EFAULT;
537 } else {
538 pd->power_on(lcd->ld, 1);
539 mdelay(pd->power_on_delay);
540 }
541
542 if (!pd->reset) {
543 dev_err(lcd->dev, "reset is NULL.\n");
544 return -EFAULT;
545 } else {
546 pd->reset(lcd->ld);
547 mdelay(pd->reset_delay);
548 }
549
550 ret = ld9040_ldi_init(lcd);
551 if (ret) {
552 dev_err(lcd->dev, "failed to initialize ldi.\n");
553 return ret;
554 }
555
556 ret = ld9040_ldi_enable(lcd);
557 if (ret) {
558 dev_err(lcd->dev, "failed to enable ldi.\n");
559 return ret;
560 }
561
562 return 0;
563}
564
565static int ld9040_power_off(struct ld9040 *lcd)
566{
567 int ret = 0;
568 struct lcd_platform_data *pd = NULL;
569
570 pd = lcd->lcd_pd;
571 if (!pd) {
572 dev_err(lcd->dev, "platform data is NULL.\n");
573 return -EFAULT;
574 }
575
576 ret = ld9040_ldi_disable(lcd);
577 if (ret) {
578 dev_err(lcd->dev, "lcd setting failed.\n");
579 return -EIO;
580 }
581
582 mdelay(pd->power_off_delay);
583
584 if (!pd->power_on) {
585 dev_err(lcd->dev, "power_on is NULL.\n");
586 return -EFAULT;
587 } else
588 pd->power_on(lcd->ld, 0);
589
590 return 0;
591}
592
593static int ld9040_power(struct ld9040 *lcd, int power)
594{
595 int ret = 0;
596
597 if (power_is_on(power) && !power_is_on(lcd->power))
598 ret = ld9040_power_on(lcd);
599 else if (!power_is_on(power) && power_is_on(lcd->power))
600 ret = ld9040_power_off(lcd);
601
602 if (!ret)
603 lcd->power = power;
604
605 return ret;
606}
607
608static int ld9040_set_power(struct lcd_device *ld, int power)
609{
610 struct ld9040 *lcd = lcd_get_data(ld);
611
612 if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
613 power != FB_BLANK_NORMAL) {
614 dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
615 return -EINVAL;
616 }
617
618 return ld9040_power(lcd, power);
619}
620
621static int ld9040_get_power(struct lcd_device *ld)
622{
623 struct ld9040 *lcd = lcd_get_data(ld);
624
625 return lcd->power;
626}
627
628static int ld9040_get_brightness(struct backlight_device *bd)
629{
630 return bd->props.brightness;
631}
632
633static int ld9040_set_brightness(struct backlight_device *bd)
634{
635 int ret = 0, brightness = bd->props.brightness;
636 struct ld9040 *lcd = bl_get_data(bd);
637
638 if (brightness < MIN_BRIGHTNESS ||
639 brightness > bd->props.max_brightness) {
640 dev_err(&bd->dev, "lcd brightness should be %d to %d.\n",
641 MIN_BRIGHTNESS, MAX_BRIGHTNESS);
642 return -EINVAL;
643 }
644
645 ret = ld9040_gamma_ctl(lcd, bd->props.brightness);
646 if (ret) {
647 dev_err(&bd->dev, "lcd brightness setting failed.\n");
648 return -EIO;
649 }
650
651 return ret;
652}
653
654static struct lcd_ops ld9040_lcd_ops = {
655 .set_power = ld9040_set_power,
656 .get_power = ld9040_get_power,
657};
658
659static const struct backlight_ops ld9040_backlight_ops = {
660 .get_brightness = ld9040_get_brightness,
661 .update_status = ld9040_set_brightness,
662};
663
664
665static int ld9040_probe(struct spi_device *spi)
666{
667 int ret = 0;
668 struct ld9040 *lcd = NULL;
669 struct lcd_device *ld = NULL;
670 struct backlight_device *bd = NULL;
671
672 lcd = kzalloc(sizeof(struct ld9040), GFP_KERNEL);
673 if (!lcd)
674 return -ENOMEM;
675
676 /* ld9040 lcd panel uses 3-wire 9bits SPI Mode. */
677 spi->bits_per_word = 9;
678
679 ret = spi_setup(spi);
680 if (ret < 0) {
681 dev_err(&spi->dev, "spi setup failed.\n");
682 goto out_free_lcd;
683 }
684
685 lcd->spi = spi;
686 lcd->dev = &spi->dev;
687
688 lcd->lcd_pd = spi->dev.platform_data;
689 if (!lcd->lcd_pd) {
690 dev_err(&spi->dev, "platform data is NULL.\n");
691 goto out_free_lcd;
692 }
693
694 ld = lcd_device_register("ld9040", &spi->dev, lcd, &ld9040_lcd_ops);
695 if (IS_ERR(ld)) {
696 ret = PTR_ERR(ld);
697 goto out_free_lcd;
698 }
699
700 lcd->ld = ld;
701
702 bd = backlight_device_register("ld9040-bl", &spi->dev,
703 lcd, &ld9040_backlight_ops, NULL);
704 if (IS_ERR(ld)) {
705 ret = PTR_ERR(ld);
706 goto out_free_lcd;
707 }
708
709 bd->props.max_brightness = MAX_BRIGHTNESS;
710 bd->props.brightness = MAX_BRIGHTNESS;
711 lcd->bd = bd;
712
713 /*
714 * if lcd panel was on from bootloader like u-boot then
715 * do not lcd on.
716 */
717 if (!lcd->lcd_pd->lcd_enabled) {
718 /*
719 * if lcd panel was off from bootloader then
720 * current lcd status is powerdown and then
721 * it enables lcd panel.
722 */
723 lcd->power = FB_BLANK_POWERDOWN;
724
725 ld9040_power(lcd, FB_BLANK_UNBLANK);
726 } else
727 lcd->power = FB_BLANK_UNBLANK;
728
729 dev_set_drvdata(&spi->dev, lcd);
730
731 dev_info(&spi->dev, "ld9040 panel driver has been probed.\n");
732 return 0;
733
734out_free_lcd:
735 kfree(lcd);
736 return ret;
737}
738
739static int __devexit ld9040_remove(struct spi_device *spi)
740{
741 struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
742
743 ld9040_power(lcd, FB_BLANK_POWERDOWN);
744 lcd_device_unregister(lcd->ld);
745 kfree(lcd);
746
747 return 0;
748}
749
750#if defined(CONFIG_PM)
751static int ld9040_suspend(struct spi_device *spi, pm_message_t mesg)
752{
753 int ret = 0;
754 struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
755
756 dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
757
758 /*
759 * when lcd panel is suspend, lcd panel becomes off
760 * regardless of status.
761 */
762 ret = ld9040_power(lcd, FB_BLANK_POWERDOWN);
763
764 return ret;
765}
766
767static int ld9040_resume(struct spi_device *spi)
768{
769 int ret = 0;
770 struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
771
772 lcd->power = FB_BLANK_POWERDOWN;
773
774 ret = ld9040_power(lcd, FB_BLANK_UNBLANK);
775
776 return ret;
777}
778#else
779#define ld9040_suspend NULL
780#define ld9040_resume NULL
781#endif
782
783/* Power down all displays on reboot, poweroff or halt. */
784static void ld9040_shutdown(struct spi_device *spi)
785{
786 struct ld9040 *lcd = dev_get_drvdata(&spi->dev);
787
788 ld9040_power(lcd, FB_BLANK_POWERDOWN);
789}
790
791static struct spi_driver ld9040_driver = {
792 .driver = {
793 .name = "ld9040",
794 .bus = &spi_bus_type,
795 .owner = THIS_MODULE,
796 },
797 .probe = ld9040_probe,
798 .remove = __devexit_p(ld9040_remove),
799 .shutdown = ld9040_shutdown,
800 .suspend = ld9040_suspend,
801 .resume = ld9040_resume,
802};
803
804static int __init ld9040_init(void)
805{
806 return spi_register_driver(&ld9040_driver);
807}
808
809static void __exit ld9040_exit(void)
810{
811 spi_unregister_driver(&ld9040_driver);
812}
813
814module_init(ld9040_init);
815module_exit(ld9040_exit);
816
817MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
818MODULE_DESCRIPTION("ld9040 LCD Driver");
819MODULE_LICENSE("GPL");