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Maxime Riparda2ed00d2012-12-07 12:30:38 -08001/*
Masanari Iidaa895d572013-04-09 02:06:50 +09002 * Driver for the Solomon SSD1307 OLED controller
Maxime Riparda2ed00d2012-12-07 12:30:38 -08003 *
4 * Copyright 2012 Free Electrons
5 *
6 * Licensed under the GPLv2 or later.
7 */
8
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/i2c.h>
12#include <linux/fb.h>
13#include <linux/uaccess.h>
14#include <linux/of_device.h>
15#include <linux/of_gpio.h>
16#include <linux/pwm.h>
17#include <linux/delay.h>
18
Maxime Riparda2ed00d2012-12-07 12:30:38 -080019#define SSD1307FB_DATA 0x40
20#define SSD1307FB_COMMAND 0x80
21
Maxime Ripard301bc062013-04-22 12:02:25 +020022#define SSD1307FB_SET_ADDRESS_MODE 0x20
23#define SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL (0x00)
24#define SSD1307FB_SET_ADDRESS_MODE_VERTICAL (0x01)
25#define SSD1307FB_SET_ADDRESS_MODE_PAGE (0x02)
26#define SSD1307FB_SET_COL_RANGE 0x21
27#define SSD1307FB_SET_PAGE_RANGE 0x22
Maxime Riparda2ed00d2012-12-07 12:30:38 -080028#define SSD1307FB_CONTRAST 0x81
Maxime Ripardbbc79082013-04-22 11:55:54 +020029#define SSD1307FB_CHARGE_PUMP 0x8d
Maxime Riparda2ed00d2012-12-07 12:30:38 -080030#define SSD1307FB_SEG_REMAP_ON 0xa1
31#define SSD1307FB_DISPLAY_OFF 0xae
Maxime Ripardbbc79082013-04-22 11:55:54 +020032#define SSD1307FB_SET_MULTIPLEX_RATIO 0xa8
Maxime Riparda2ed00d2012-12-07 12:30:38 -080033#define SSD1307FB_DISPLAY_ON 0xaf
34#define SSD1307FB_START_PAGE_ADDRESS 0xb0
Maxime Ripardbbc79082013-04-22 11:55:54 +020035#define SSD1307FB_SET_DISPLAY_OFFSET 0xd3
36#define SSD1307FB_SET_CLOCK_FREQ 0xd5
37#define SSD1307FB_SET_PRECHARGE_PERIOD 0xd9
38#define SSD1307FB_SET_COM_PINS_CONFIG 0xda
39#define SSD1307FB_SET_VCOMH 0xdb
40
41struct ssd1307fb_par;
42
43struct ssd1307fb_ops {
44 int (*init)(struct ssd1307fb_par *);
45 int (*remove)(struct ssd1307fb_par *);
46};
Maxime Riparda2ed00d2012-12-07 12:30:38 -080047
48struct ssd1307fb_par {
49 struct i2c_client *client;
Maxime Ripardbbc79082013-04-22 11:55:54 +020050 u32 height;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080051 struct fb_info *info;
Maxime Ripardbbc79082013-04-22 11:55:54 +020052 struct ssd1307fb_ops *ops;
53 u32 page_offset;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080054 struct pwm_device *pwm;
55 u32 pwm_period;
56 int reset;
Maxime Ripardbbc79082013-04-22 11:55:54 +020057 u32 width;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080058};
59
Maxime Ripard9f7714d2013-04-22 12:02:23 +020060struct ssd1307fb_array {
61 u8 type;
62 u8 data[0];
63};
64
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -080065static struct fb_fix_screeninfo ssd1307fb_fix = {
Maxime Riparda2ed00d2012-12-07 12:30:38 -080066 .id = "Solomon SSD1307",
67 .type = FB_TYPE_PACKED_PIXELS,
68 .visual = FB_VISUAL_MONO10,
69 .xpanstep = 0,
70 .ypanstep = 0,
71 .ywrapstep = 0,
Maxime Riparda2ed00d2012-12-07 12:30:38 -080072 .accel = FB_ACCEL_NONE,
73};
74
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -080075static struct fb_var_screeninfo ssd1307fb_var = {
Maxime Riparda2ed00d2012-12-07 12:30:38 -080076 .bits_per_pixel = 1,
77};
78
Maxime Ripard9f7714d2013-04-22 12:02:23 +020079static struct ssd1307fb_array *ssd1307fb_alloc_array(u32 len, u8 type)
Maxime Riparda2ed00d2012-12-07 12:30:38 -080080{
Maxime Ripard9f7714d2013-04-22 12:02:23 +020081 struct ssd1307fb_array *array;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080082
Maxime Ripard9f7714d2013-04-22 12:02:23 +020083 array = kzalloc(sizeof(struct ssd1307fb_array) + len, GFP_KERNEL);
84 if (!array)
85 return NULL;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080086
Maxime Ripard9f7714d2013-04-22 12:02:23 +020087 array->type = type;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080088
Maxime Ripard9f7714d2013-04-22 12:02:23 +020089 return array;
Maxime Riparda2ed00d2012-12-07 12:30:38 -080090}
91
Maxime Ripard9f7714d2013-04-22 12:02:23 +020092static int ssd1307fb_write_array(struct i2c_client *client,
93 struct ssd1307fb_array *array, u32 len)
Maxime Riparda2ed00d2012-12-07 12:30:38 -080094{
Maxime Ripard9f7714d2013-04-22 12:02:23 +020095 int ret;
96
97 len += sizeof(struct ssd1307fb_array);
98
99 ret = i2c_master_send(client, (u8 *)array, len);
100 if (ret != len) {
101 dev_err(&client->dev, "Couldn't send I2C command.\n");
102 return ret;
103 }
104
105 return 0;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800106}
107
108static inline int ssd1307fb_write_cmd(struct i2c_client *client, u8 cmd)
109{
Maxime Ripard9f7714d2013-04-22 12:02:23 +0200110 struct ssd1307fb_array *array;
111 int ret;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800112
Maxime Ripard9f7714d2013-04-22 12:02:23 +0200113 array = ssd1307fb_alloc_array(1, SSD1307FB_COMMAND);
114 if (!array)
115 return -ENOMEM;
116
117 array->data[0] = cmd;
118
119 ret = ssd1307fb_write_array(client, array, 1);
120 kfree(array);
121
122 return ret;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800123}
124
125static inline int ssd1307fb_write_data(struct i2c_client *client, u8 data)
126{
Maxime Ripard9f7714d2013-04-22 12:02:23 +0200127 struct ssd1307fb_array *array;
128 int ret;
129
130 array = ssd1307fb_alloc_array(1, SSD1307FB_DATA);
131 if (!array)
132 return -ENOMEM;
133
134 array->data[0] = data;
135
136 ret = ssd1307fb_write_array(client, array, 1);
137 kfree(array);
138
139 return ret;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800140}
141
142static void ssd1307fb_update_display(struct ssd1307fb_par *par)
143{
Maxime Ripard301bc062013-04-22 12:02:25 +0200144 struct ssd1307fb_array *array;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800145 u8 *vmem = par->info->screen_base;
146 int i, j, k;
147
Maxime Ripard301bc062013-04-22 12:02:25 +0200148 array = ssd1307fb_alloc_array(par->width * par->height / 8,
149 SSD1307FB_DATA);
150 if (!array)
151 return;
152
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800153 /*
154 * The screen is divided in pages, each having a height of 8
155 * pixels, and the width of the screen. When sending a byte of
156 * data to the controller, it gives the 8 bits for the current
157 * column. I.e, the first byte are the 8 bits of the first
158 * column, then the 8 bits for the second column, etc.
159 *
160 *
161 * Representation of the screen, assuming it is 5 bits
162 * wide. Each letter-number combination is a bit that controls
163 * one pixel.
164 *
165 * A0 A1 A2 A3 A4
166 * B0 B1 B2 B3 B4
167 * C0 C1 C2 C3 C4
168 * D0 D1 D2 D3 D4
169 * E0 E1 E2 E3 E4
170 * F0 F1 F2 F3 F4
171 * G0 G1 G2 G3 G4
172 * H0 H1 H2 H3 H4
173 *
174 * If you want to update this screen, you need to send 5 bytes:
175 * (1) A0 B0 C0 D0 E0 F0 G0 H0
176 * (2) A1 B1 C1 D1 E1 F1 G1 H1
177 * (3) A2 B2 C2 D2 E2 F2 G2 H2
178 * (4) A3 B3 C3 D3 E3 F3 G3 H3
179 * (5) A4 B4 C4 D4 E4 F4 G4 H4
180 */
181
Maxime Ripardbbc79082013-04-22 11:55:54 +0200182 for (i = 0; i < (par->height / 8); i++) {
Maxime Ripardbbc79082013-04-22 11:55:54 +0200183 for (j = 0; j < par->width; j++) {
Maxime Ripard301bc062013-04-22 12:02:25 +0200184 u32 array_idx = i * par->width + j;
185 array->data[array_idx] = 0;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800186 for (k = 0; k < 8; k++) {
Maxime Ripardbbc79082013-04-22 11:55:54 +0200187 u32 page_length = par->width * i;
188 u32 index = page_length + (par->width * k + j) / 8;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800189 u8 byte = *(vmem + index);
Maxime Ripard552f0cc2013-01-11 14:31:43 -0800190 u8 bit = byte & (1 << (j % 8));
191 bit = bit >> (j % 8);
Maxime Ripard301bc062013-04-22 12:02:25 +0200192 array->data[array_idx] |= bit << k;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800193 }
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800194 }
195 }
Maxime Ripard301bc062013-04-22 12:02:25 +0200196
197 ssd1307fb_write_array(par->client, array, par->width * par->height / 8);
198 kfree(array);
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800199}
200
201
202static ssize_t ssd1307fb_write(struct fb_info *info, const char __user *buf,
203 size_t count, loff_t *ppos)
204{
205 struct ssd1307fb_par *par = info->par;
206 unsigned long total_size;
207 unsigned long p = *ppos;
208 u8 __iomem *dst;
209
210 total_size = info->fix.smem_len;
211
212 if (p > total_size)
213 return -EINVAL;
214
215 if (count + p > total_size)
216 count = total_size - p;
217
218 if (!count)
219 return -EINVAL;
220
221 dst = (void __force *) (info->screen_base + p);
222
223 if (copy_from_user(dst, buf, count))
224 return -EFAULT;
225
226 ssd1307fb_update_display(par);
227
228 *ppos += count;
229
230 return count;
231}
232
233static void ssd1307fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
234{
235 struct ssd1307fb_par *par = info->par;
236 sys_fillrect(info, rect);
237 ssd1307fb_update_display(par);
238}
239
240static void ssd1307fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
241{
242 struct ssd1307fb_par *par = info->par;
243 sys_copyarea(info, area);
244 ssd1307fb_update_display(par);
245}
246
247static void ssd1307fb_imageblit(struct fb_info *info, const struct fb_image *image)
248{
249 struct ssd1307fb_par *par = info->par;
250 sys_imageblit(info, image);
251 ssd1307fb_update_display(par);
252}
253
254static struct fb_ops ssd1307fb_ops = {
255 .owner = THIS_MODULE,
256 .fb_read = fb_sys_read,
257 .fb_write = ssd1307fb_write,
258 .fb_fillrect = ssd1307fb_fillrect,
259 .fb_copyarea = ssd1307fb_copyarea,
260 .fb_imageblit = ssd1307fb_imageblit,
261};
262
263static void ssd1307fb_deferred_io(struct fb_info *info,
264 struct list_head *pagelist)
265{
266 ssd1307fb_update_display(info->par);
267}
268
269static struct fb_deferred_io ssd1307fb_defio = {
270 .delay = HZ,
271 .deferred_io = ssd1307fb_deferred_io,
272};
273
Maxime Ripardbbc79082013-04-22 11:55:54 +0200274static int ssd1307fb_ssd1307_init(struct ssd1307fb_par *par)
275{
276 int ret;
277
278 par->pwm = pwm_get(&par->client->dev, NULL);
279 if (IS_ERR(par->pwm)) {
280 dev_err(&par->client->dev, "Could not get PWM from device tree!\n");
281 return PTR_ERR(par->pwm);
282 }
283
284 par->pwm_period = pwm_get_period(par->pwm);
285 /* Enable the PWM */
286 pwm_config(par->pwm, par->pwm_period / 2, par->pwm_period);
287 pwm_enable(par->pwm);
288
289 dev_dbg(&par->client->dev, "Using PWM%d with a %dns period.\n",
290 par->pwm->pwm, par->pwm_period);
291
292 /* Map column 127 of the OLED to segment 0 */
293 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON);
294 if (ret < 0)
295 return ret;
296
297 /* Turn on the display */
298 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);
299 if (ret < 0)
300 return ret;
301
302 return 0;
303}
304
305static int ssd1307fb_ssd1307_remove(struct ssd1307fb_par *par)
306{
307 pwm_disable(par->pwm);
308 pwm_put(par->pwm);
309 return 0;
310}
311
312static struct ssd1307fb_ops ssd1307fb_ssd1307_ops = {
313 .init = ssd1307fb_ssd1307_init,
314 .remove = ssd1307fb_ssd1307_remove,
315};
316
317static int ssd1307fb_ssd1306_init(struct ssd1307fb_par *par)
318{
319 int ret;
320
321 /* Set initial contrast */
322 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST);
323 ret = ret & ssd1307fb_write_cmd(par->client, 0x7f);
324 if (ret < 0)
325 return ret;
326
327 /* Set COM direction */
328 ret = ssd1307fb_write_cmd(par->client, 0xc8);
329 if (ret < 0)
330 return ret;
331
332 /* Set segment re-map */
333 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON);
334 if (ret < 0)
335 return ret;
336
337 /* Set multiplex ratio value */
338 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_MULTIPLEX_RATIO);
339 ret = ret & ssd1307fb_write_cmd(par->client, par->height - 1);
340 if (ret < 0)
341 return ret;
342
343 /* set display offset value */
344 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_DISPLAY_OFFSET);
345 ret = ssd1307fb_write_cmd(par->client, 0x20);
346 if (ret < 0)
347 return ret;
348
349 /* Set clock frequency */
350 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_CLOCK_FREQ);
351 ret = ret & ssd1307fb_write_cmd(par->client, 0xf0);
352 if (ret < 0)
353 return ret;
354
355 /* Set precharge period in number of ticks from the internal clock */
356 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PRECHARGE_PERIOD);
357 ret = ret & ssd1307fb_write_cmd(par->client, 0x22);
358 if (ret < 0)
359 return ret;
360
361 /* Set COM pins configuration */
362 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COM_PINS_CONFIG);
363 ret = ret & ssd1307fb_write_cmd(par->client, 0x22);
364 if (ret < 0)
365 return ret;
366
367 /* Set VCOMH */
368 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_VCOMH);
369 ret = ret & ssd1307fb_write_cmd(par->client, 0x49);
370 if (ret < 0)
371 return ret;
372
373 /* Turn on the DC-DC Charge Pump */
374 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CHARGE_PUMP);
375 ret = ret & ssd1307fb_write_cmd(par->client, 0x14);
376 if (ret < 0)
377 return ret;
378
Maxime Ripard301bc062013-04-22 12:02:25 +0200379 /* Switch to horizontal addressing mode */
380 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_ADDRESS_MODE);
381 ret = ret & ssd1307fb_write_cmd(par->client,
382 SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL);
383 if (ret < 0)
384 return ret;
385
386 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE);
387 ret = ret & ssd1307fb_write_cmd(par->client, 0x0);
388 ret = ret & ssd1307fb_write_cmd(par->client, par->width - 1);
389 if (ret < 0)
390 return ret;
391
392 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE);
393 ret = ret & ssd1307fb_write_cmd(par->client, 0x0);
394 ret = ret & ssd1307fb_write_cmd(par->client,
395 par->page_offset + (par->height / 8) - 1);
396 if (ret < 0)
397 return ret;
398
Maxime Ripardbbc79082013-04-22 11:55:54 +0200399 /* Turn on the display */
400 ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);
401 if (ret < 0)
402 return ret;
403
404 return 0;
405}
406
407static struct ssd1307fb_ops ssd1307fb_ssd1306_ops = {
408 .init = ssd1307fb_ssd1306_init,
409};
410
411static const struct of_device_id ssd1307fb_of_match[] = {
412 {
413 .compatible = "solomon,ssd1306fb-i2c",
414 .data = (void *)&ssd1307fb_ssd1306_ops,
415 },
416 {
417 .compatible = "solomon,ssd1307fb-i2c",
418 .data = (void *)&ssd1307fb_ssd1307_ops,
419 },
420 {},
421};
422MODULE_DEVICE_TABLE(of, ssd1307fb_of_match);
423
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -0800424static int ssd1307fb_probe(struct i2c_client *client,
425 const struct i2c_device_id *id)
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800426{
427 struct fb_info *info;
Maxime Ripardbbc79082013-04-22 11:55:54 +0200428 struct device_node *node = client->dev.of_node;
429 u32 vmem_size;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800430 struct ssd1307fb_par *par;
431 u8 *vmem;
432 int ret;
433
Maxime Ripardbbc79082013-04-22 11:55:54 +0200434 if (!node) {
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800435 dev_err(&client->dev, "No device tree data found!\n");
436 return -EINVAL;
437 }
438
439 info = framebuffer_alloc(sizeof(struct ssd1307fb_par), &client->dev);
440 if (!info) {
441 dev_err(&client->dev, "Couldn't allocate framebuffer.\n");
442 return -ENOMEM;
443 }
444
Maxime Ripardbbc79082013-04-22 11:55:54 +0200445 par = info->par;
446 par->info = info;
447 par->client = client;
448
449 par->ops = (struct ssd1307fb_ops *)of_match_device(ssd1307fb_of_match,
450 &client->dev)->data;
451
452 par->reset = of_get_named_gpio(client->dev.of_node,
453 "reset-gpios", 0);
454 if (!gpio_is_valid(par->reset)) {
455 ret = -EINVAL;
456 goto fb_alloc_error;
457 }
458
459 if (of_property_read_u32(node, "solomon,width", &par->width))
460 par->width = 96;
461
462 if (of_property_read_u32(node, "solomon,height", &par->height))
463 par->width = 16;
464
465 if (of_property_read_u32(node, "solomon,page-offset", &par->page_offset))
466 par->page_offset = 1;
467
468 vmem_size = par->width * par->height / 8;
469
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800470 vmem = devm_kzalloc(&client->dev, vmem_size, GFP_KERNEL);
471 if (!vmem) {
472 dev_err(&client->dev, "Couldn't allocate graphical memory.\n");
473 ret = -ENOMEM;
474 goto fb_alloc_error;
475 }
476
477 info->fbops = &ssd1307fb_ops;
478 info->fix = ssd1307fb_fix;
Maxime Ripardbbc79082013-04-22 11:55:54 +0200479 info->fix.line_length = par->width / 8;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800480 info->fbdefio = &ssd1307fb_defio;
481
482 info->var = ssd1307fb_var;
Maxime Ripardbbc79082013-04-22 11:55:54 +0200483 info->var.xres = par->width;
484 info->var.xres_virtual = par->width;
485 info->var.yres = par->height;
486 info->var.yres_virtual = par->height;
487
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800488 info->var.red.length = 1;
489 info->var.red.offset = 0;
490 info->var.green.length = 1;
491 info->var.green.offset = 0;
492 info->var.blue.length = 1;
493 info->var.blue.offset = 0;
494
495 info->screen_base = (u8 __force __iomem *)vmem;
496 info->fix.smem_start = (unsigned long)vmem;
497 info->fix.smem_len = vmem_size;
498
499 fb_deferred_io_init(info);
500
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800501 ret = devm_gpio_request_one(&client->dev, par->reset,
502 GPIOF_OUT_INIT_HIGH,
503 "oled-reset");
504 if (ret) {
505 dev_err(&client->dev,
506 "failed to request gpio %d: %d\n",
507 par->reset, ret);
508 goto reset_oled_error;
509 }
510
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800511 i2c_set_clientdata(client, info);
512
513 /* Reset the screen */
514 gpio_set_value(par->reset, 0);
515 udelay(4);
516 gpio_set_value(par->reset, 1);
517 udelay(4);
518
Maxime Ripardbbc79082013-04-22 11:55:54 +0200519 if (par->ops->init) {
520 ret = par->ops->init(par);
521 if (ret)
522 goto reset_oled_error;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800523 }
524
Maxime Ripardbbc79082013-04-22 11:55:54 +0200525 ret = register_framebuffer(info);
526 if (ret) {
527 dev_err(&client->dev, "Couldn't register the framebuffer\n");
528 goto panel_init_error;
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800529 }
530
531 dev_info(&client->dev, "fb%d: %s framebuffer device registered, using %d bytes of video memory\n", info->node, info->fix.id, vmem_size);
532
533 return 0;
534
Maxime Ripardbbc79082013-04-22 11:55:54 +0200535panel_init_error:
536 if (par->ops->remove)
537 par->ops->remove(par);
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800538reset_oled_error:
539 fb_deferred_io_cleanup(info);
540fb_alloc_error:
541 framebuffer_release(info);
542 return ret;
543}
544
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -0800545static int ssd1307fb_remove(struct i2c_client *client)
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800546{
547 struct fb_info *info = i2c_get_clientdata(client);
548 struct ssd1307fb_par *par = info->par;
549
550 unregister_framebuffer(info);
Maxime Ripardbbc79082013-04-22 11:55:54 +0200551 if (par->ops->remove)
552 par->ops->remove(par);
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800553 fb_deferred_io_cleanup(info);
554 framebuffer_release(info);
555
556 return 0;
557}
558
559static const struct i2c_device_id ssd1307fb_i2c_id[] = {
Maxime Ripardbbc79082013-04-22 11:55:54 +0200560 { "ssd1306fb", 0 },
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800561 { "ssd1307fb", 0 },
562 { }
563};
564MODULE_DEVICE_TABLE(i2c, ssd1307fb_i2c_id);
565
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800566static struct i2c_driver ssd1307fb_driver = {
567 .probe = ssd1307fb_probe,
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -0800568 .remove = ssd1307fb_remove,
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800569 .id_table = ssd1307fb_i2c_id,
570 .driver = {
571 .name = "ssd1307fb",
Sachin Kamatd71f8cd2013-09-30 14:15:31 +0530572 .of_match_table = ssd1307fb_of_match,
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800573 .owner = THIS_MODULE,
574 },
575};
576
577module_i2c_driver(ssd1307fb_driver);
578
Masanari Iidaa895d572013-04-09 02:06:50 +0900579MODULE_DESCRIPTION("FB driver for the Solomon SSD1307 OLED controller");
Maxime Riparda2ed00d2012-12-07 12:30:38 -0800580MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
581MODULE_LICENSE("GPL");