forked from ~ljy/RK356X_SDK_RELEASE

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hc
2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f 
 kernel/drivers/misc/lt7911d-fb-notifier.c
....@@ -5,19 +5,457 @@
55 
66 #include <linux/kernel.h>
77 #include <linux/delay.h>
8
+#include <linux/i2c.h>
89 #include <linux/platform_device.h>
10
+#include <linux/regulator/consumer.h>
911 #include <linux/gpio/consumer.h>
1012 #include <linux/module.h>
1113 #include <linux/of.h>
1214 #include <linux/of_gpio.h>
1315 #include <linux/notifier.h>
1416 #include <linux/fb.h>
17
+#include <linux/regmap.h>
18
+#include <linux/clk.h>
19
+#include "lt7911d-fw.h"
1520 
1621 struct lt7911d {
1722 	struct device *dev;
18
-	struct gpio_descs *gpios;
23
+	struct regmap *regmap;
24
+	struct serdes_init_seq *serdes_init_seq;
25
+	struct gpio_desc *reset_gpio;
26
+	struct gpio_desc *enable_gpio;
1927 	struct notifier_block fb_notif;
2028 	int fb_blank;
29
+};
30
+
31
+static int Datalen = 17594;
32
+/*to save hdcp key */
33
+static unsigned char HdcpKey[286];
34
+/*the buffer to read flash, its size should be equal the size of bin, max size is 24KB*/
35
+static unsigned char ReadFirmware[17594];
36
+/*The buffer to read flash, hex->bin->txt*/
37
+//static unsigned char FirmwareData[17594];
38
+
39
+static int I2C_Write_Byte(struct lt7911d *lt7911d, unsigned char reg, unsigned char val)
40
+{
41
+	int ret;
42
+
43
+	ret = regmap_write(lt7911d->regmap, reg, val);
44
+	if (ret < 0) {
45
+		pr_info("failed to write lt7911d register 0x%x: %d\n", reg, ret);
46
+		return ret;
47
+	}
48
+	return 0;
49
+}
50
+
51
+static unsigned char I2C_Read_Byte(struct lt7911d *lt7911d, unsigned char reg)
52
+{
53
+	int ret;
54
+	unsigned int val;
55
+
56
+	ret = regmap_read(lt7911d->regmap, reg, &val);
57
+	if (ret < 0) {
58
+		pr_info("failed to read lt7911d register 0x%x: %d\n", reg, ret);
59
+		return ret;
60
+	}
61
+
62
+	return (unsigned char)val;
63
+}
64
+
65
+static bool lt7911d_check_chip_id(struct lt7911d *lt7911d)
66
+{
67
+	unsigned char id_h, id_l;
68
+
69
+	/*0x80ee=0x01 to enable i2c interface*/
70
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
71
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
72
+	/*write bank 0xa0, read 0xa000 and 0xa001*/
73
+	I2C_Write_Byte(lt7911d, 0xFF, 0xA0);
74
+	id_h = I2C_Read_Byte(lt7911d, 0x00);
75
+	id_l = I2C_Read_Byte(lt7911d, 0x01);
76
+
77
+	/*chip id=0x1605*/
78
+	if ((id_h == 0x16) && (id_l == 0x05)) {
79
+		pr_info("%s chip id =0x1605\n", __func__);
80
+		/*0x80ee=0x00 to disable i2c*/
81
+		I2C_Write_Byte(lt7911d, 0xFF, 0x80);
82
+		I2C_Write_Byte(lt7911d, 0xEE, 0x00);
83
+		return true;
84
+	} else {
85
+		pr_info("%s chip id 0x%x is not 0x1605\n", __func__, (id_h << 8) | id_l);
86
+		/*0x80ee=0x00 to disable i2c*/
87
+		I2C_Write_Byte(lt7911d, 0xFF, 0x80);
88
+		I2C_Write_Byte(lt7911d, 0xEE, 0x00);
89
+		return false;
90
+	}
91
+}
92
+
93
+static int lt7911d_check_fw_version(struct lt7911d *lt7911d)
94
+{
95
+	unsigned char fw;
96
+
97
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
98
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
99
+
100
+	/*read 0xD211*/
101
+	I2C_Write_Byte(lt7911d, 0xFF, 0xD2);
102
+	fw = I2C_Read_Byte(lt7911d, 0x11);
103
+
104
+	/*fw version address is 0x1dfb*/
105
+	if (fw < FirmwareData[0x1dfb]) {
106
+		pr_info("%s fw %d<%d, need to upgrade\n", __func__, fw, FirmwareData[0x1dfb]);
107
+		I2C_Write_Byte(lt7911d, 0xFF, 0x80);
108
+		I2C_Write_Byte(lt7911d, 0xEE, 0x00);
109
+		return 0;
110
+	} else {
111
+		pr_info("%s fw %d>=%d, no need upgrade\n", __func__, fw, FirmwareData[0x1dfb]);
112
+		I2C_Write_Byte(lt7911d, 0xFF, 0x80);
113
+		I2C_Write_Byte(lt7911d, 0xEE, 0x00);
114
+		return -1;
115
+	}
116
+}
117
+
118
+static void lt7911d_config_para(struct lt7911d *lt7911d)
119
+{
120
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
121
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
122
+	I2C_Write_Byte(lt7911d, 0x5A, 0x82);
123
+	I2C_Write_Byte(lt7911d, 0x5E, 0xC0);
124
+	I2C_Write_Byte(lt7911d, 0x58, 0x00);
125
+	I2C_Write_Byte(lt7911d, 0x59, 0x51);
126
+	I2C_Write_Byte(lt7911d, 0x5A, 0x92);
127
+	I2C_Write_Byte(lt7911d, 0x5A, 0x82);
128
+}
129
+
130
+static void lt7911d_block_erase(struct lt7911d *lt7911d)
131
+{
132
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
133
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
134
+	I2C_Write_Byte(lt7911d, 0x5A, 0x86);
135
+	I2C_Write_Byte(lt7911d, 0x5A, 0x82);
136
+	I2C_Write_Byte(lt7911d, 0x5B, 0x00);
137
+	I2C_Write_Byte(lt7911d, 0x5C, 0x00);
138
+	I2C_Write_Byte(lt7911d, 0x5D, 0x00);
139
+	I2C_Write_Byte(lt7911d, 0x5A, 0x83);
140
+	I2C_Write_Byte(lt7911d, 0x5A, 0x82);
141
+
142
+	/*The time to waiting for earse flash*/
143
+	msleep(500);
144
+}
145
+
146
+/*If earse flash will erase the hdcp key, so need to backup firstly*/
147
+static void SaveHdcpKeyFromFlash(struct lt7911d *lt7911d)
148
+{
149
+	unsigned int StartAddr;
150
+	unsigned int npage, i, j;
151
+	unsigned char npagelen = 0;
152
+	unsigned char addr[3] = {0};
153
+
154
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
155
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
156
+	I2C_Write_Byte(lt7911d, 0xFF, 0x90);
157
+	I2C_Write_Byte(lt7911d, 0x02, 0xdf);
158
+	I2C_Write_Byte(lt7911d, 0x02, 0xff);
159
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
160
+	I2C_Write_Byte(lt7911d, 0x5a, 0x86);
161
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
162
+
163
+	/*The first address of HDCP KEY*/
164
+	StartAddr = 0x006000;
165
+	addr[0] = (StartAddr & 0xFF0000) >> 16;
166
+	addr[1] = (StartAddr & 0xFF00) >> 8;
167
+	addr[2] = StartAddr & 0xFF;
168
+
169
+	/*hdcp key size is 286 byte*/
170
+	npage = 18;
171
+	npagelen = 16;
172
+
173
+	for (i = 0; i < npage; i++) {
174
+		I2C_Write_Byte(lt7911d, 0x5E, 0x6f);
175
+		I2C_Write_Byte(lt7911d, 0x5A, 0xA2);
176
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
177
+		I2C_Write_Byte(lt7911d, 0x5B, addr[0]);
178
+		I2C_Write_Byte(lt7911d, 0x5C, addr[1]);
179
+		I2C_Write_Byte(lt7911d, 0x5D, addr[2]);
180
+		I2C_Write_Byte(lt7911d, 0x5A, 0x92);
181
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
182
+		I2C_Write_Byte(lt7911d, 0x58, 0x01);
183
+
184
+		if (i == 17)
185
+			npagelen = 14;
186
+
187
+		for (j = 0; j < npagelen; j++)
188
+			HdcpKey[i * 16 + j] = I2C_Read_Byte(lt7911d, 0x5F);
189
+
190
+		StartAddr += 16;
191
+		addr[0] = (StartAddr & 0xFF0000) >> 16;
192
+		addr[1] = (StartAddr & 0xFF00) >> 8;
193
+		addr[2] = StartAddr & 0xFF;
194
+	}
195
+
196
+	I2C_Write_Byte(lt7911d, 0x5a, 0x8a);
197
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
198
+}
199
+
200
+static void lt7911d_write_firmware_to_flash(struct lt7911d *lt7911d)
201
+{
202
+	unsigned int StartAddr;
203
+	unsigned int npage, i, j;
204
+	unsigned char npagelen = 0;
205
+	unsigned char addr[3] = {0};
206
+
207
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
208
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
209
+	I2C_Write_Byte(lt7911d, 0xFF, 0x90);
210
+	I2C_Write_Byte(lt7911d, 0x02, 0xdf);
211
+	I2C_Write_Byte(lt7911d, 0x02, 0xff);
212
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
213
+	I2C_Write_Byte(lt7911d, 0x5a, 0x86);
214
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
215
+
216
+	/*The first address of flash£¬Max Size 24K*/
217
+	StartAddr = 0x000000;
218
+	addr[0] = (StartAddr & 0xFF0000) >> 16;
219
+	addr[1] = (StartAddr & 0xFF00) >> 8;
220
+	addr[2] = StartAddr & 0xFF;
221
+
222
+	if (Datalen % 16) {
223
+		/*Datalen is the length of the firmware.*/
224
+		npage = Datalen / 16 + 1;
225
+	} else {
226
+		npage = Datalen / 16;
227
+	}
228
+	npagelen = 16;
229
+
230
+	for (i = 0; i < npage; i++) {
231
+		I2C_Write_Byte(lt7911d, 0x5A, 0x86);
232
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
233
+
234
+		I2C_Write_Byte(lt7911d, 0x5E, 0xef);
235
+		I2C_Write_Byte(lt7911d, 0x5A, 0xA2);
236
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
237
+		I2C_Write_Byte(lt7911d, 0x58, 0x01);
238
+
239
+		if ((Datalen - i * 16) < 16)
240
+			npagelen = Datalen - i*16;
241
+
242
+		for (j = 0; j < npagelen; j++) {
243
+			/*please just continue to write data to 0x59,*/
244
+			/*and lt7911d will increase the address auto use 0xff*/
245
+			/*as insufficient data if datelen%16 is not zero*/
246
+			I2C_Write_Byte(lt7911d, 0x59, FirmwareData[i*16 + j]);
247
+		}
248
+
249
+		/*change the first address*/
250
+		I2C_Write_Byte(lt7911d, 0x5B, addr[0]);
251
+		I2C_Write_Byte(lt7911d, 0x5C, addr[1]);
252
+		I2C_Write_Byte(lt7911d, 0x5D, addr[2]);
253
+		I2C_Write_Byte(lt7911d, 0x5E, 0xE0);
254
+		I2C_Write_Byte(lt7911d, 0x5A, 0x92);
255
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
256
+
257
+		StartAddr += 16;
258
+		addr[0] = (StartAddr & 0xFF0000) >> 16;
259
+		addr[1] = (StartAddr & 0xFF00) >> 8;
260
+		addr[2] = StartAddr & 0xFF;
261
+	}
262
+
263
+	I2C_Write_Byte(lt7911d, 0x5a, 0x8a);
264
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
265
+
266
+	/*reset fifo*/
267
+	I2C_Write_Byte(lt7911d, 0xFF, 0x90);
268
+	I2C_Write_Byte(lt7911d, 0x02, 0xDF);
269
+	I2C_Write_Byte(lt7911d, 0x02, 0xFF);
270
+	msleep(20);
271
+}
272
+
273
+static void lt7911d_write_hdcpkey_to_flash(struct lt7911d *lt7911d)
274
+{
275
+	unsigned int StartAddr;
276
+	unsigned int npage, i, j;
277
+	unsigned char npagelen = 0;
278
+	unsigned char addr[3] = {0};
279
+
280
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
281
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
282
+	I2C_Write_Byte(lt7911d, 0xFF, 0x90);
283
+	I2C_Write_Byte(lt7911d, 0x02, 0xdf);
284
+	I2C_Write_Byte(lt7911d, 0x02, 0xff);
285
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
286
+	I2C_Write_Byte(lt7911d, 0x5a, 0x86);
287
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
288
+
289
+	/*hdcp key first address*/
290
+	StartAddr = 0x006000;
291
+	addr[0] = (StartAddr & 0xFF0000) >> 16;
292
+	addr[1] = (StartAddr & 0xFF00) >> 8;
293
+	addr[2] = StartAddr & 0xFF;
294
+
295
+	npage = 18;
296
+	npagelen = 16;
297
+
298
+	for (i = 0; i < npage; i++) {
299
+		I2C_Write_Byte(lt7911d, 0x5A, 0x86);
300
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
301
+
302
+		I2C_Write_Byte(lt7911d, 0x5E, 0xef);
303
+		I2C_Write_Byte(lt7911d, 0x5A, 0xA2);
304
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
305
+		I2C_Write_Byte(lt7911d, 0x58, 0x01);
306
+
307
+		if (i == 17)
308
+			npagelen = 14;
309
+
310
+		for (j = 0; j < npagelen; j++) {
311
+			/*please just continue to write data to 0x59,*/
312
+			/*and lt7911d will increase the address auto use 0xff*/
313
+			/*as insufficient data if datelen%16 is not zero .*/
314
+			I2C_Write_Byte(lt7911d, 0x59, HdcpKey[i*16 + j]);
315
+		}
316
+
317
+		if (npagelen == 14) {
318
+			I2C_Write_Byte(lt7911d, 0x59, 0xFF);
319
+			I2C_Write_Byte(lt7911d, 0x59, 0xFF);
320
+		}
321
+
322
+		/*change the first address*/
323
+		I2C_Write_Byte(lt7911d, 0x5B, addr[0]);
324
+		I2C_Write_Byte(lt7911d, 0x5C, addr[1]);
325
+		I2C_Write_Byte(lt7911d, 0x5D, addr[2]);
326
+		I2C_Write_Byte(lt7911d, 0x5E, 0xE0);
327
+		I2C_Write_Byte(lt7911d, 0x5A, 0x92);
328
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
329
+
330
+		StartAddr += 16;
331
+		addr[0] = (StartAddr & 0xFF0000) >> 16;
332
+		addr[1] = (StartAddr & 0xFF00) >> 8;
333
+		addr[2] = StartAddr & 0xFF;
334
+	}
335
+
336
+	I2C_Write_Byte(lt7911d, 0x5a, 0x8a);
337
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
338
+
339
+	/*reset fifo*/
340
+	I2C_Write_Byte(lt7911d, 0xFF, 0x90);
341
+	I2C_Write_Byte(lt7911d, 0x02, 0xDF);
342
+	I2C_Write_Byte(lt7911d, 0x02, 0xFF);
343
+	msleep(20);
344
+}
345
+
346
+static void lt7911d_read_firmware_from_flash(struct lt7911d *lt7911d)
347
+{
348
+	unsigned int StartAddr;
349
+	unsigned int npage, i, j;
350
+	unsigned char npagelen = 0;
351
+	unsigned char addr[3] = {0};
352
+
353
+	memset(ReadFirmware, 0, sizeof(ReadFirmware));
354
+
355
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
356
+	I2C_Write_Byte(lt7911d, 0xEE, 0x01);
357
+	I2C_Write_Byte(lt7911d, 0xFF, 0x90);
358
+	I2C_Write_Byte(lt7911d, 0x02, 0xdf);
359
+	I2C_Write_Byte(lt7911d, 0x02, 0xff);
360
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
361
+	I2C_Write_Byte(lt7911d, 0x5a, 0x86);
362
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
363
+
364
+	/*the first address of firmware*/
365
+	StartAddr = 0x000000;
366
+	addr[0] = (StartAddr & 0xFF0000) >> 16;
367
+	addr[1] = (StartAddr & 0xFF00) >> 8;
368
+	addr[2] = StartAddr & 0xFF;
369
+
370
+	if (Datalen % 16)
371
+		npage = Datalen / 16 + 1;
372
+	else
373
+		npage = Datalen / 16;
374
+
375
+	npagelen = 16;
376
+
377
+	for (i = 0; i < npage; i++) {
378
+		I2C_Write_Byte(lt7911d, 0x5E, 0x6f);
379
+		I2C_Write_Byte(lt7911d, 0x5A, 0xA2);
380
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
381
+		I2C_Write_Byte(lt7911d, 0x5B, addr[0]);
382
+		I2C_Write_Byte(lt7911d, 0x5C, addr[1]);
383
+		I2C_Write_Byte(lt7911d, 0x5D, addr[2]);
384
+		I2C_Write_Byte(lt7911d, 0x5A, 0x92);
385
+		I2C_Write_Byte(lt7911d, 0x5A, 0x82);
386
+		I2C_Write_Byte(lt7911d, 0x58, 0x01);
387
+
388
+		if ((Datalen - i * 16) < 16)
389
+			npagelen = Datalen - i*16;
390
+
391
+		for (j = 0; j < npagelen; j++) {
392
+			/*please just continue to read data from 0x5f*/
393
+			/*lt7911d will increase the address auto*/
394
+			ReadFirmware[i*16 + j] = I2C_Read_Byte(lt7911d, 0x5F);
395
+		}
396
+
397
+		StartAddr += 16;
398
+		/*change the first address*/
399
+		addr[0] = (StartAddr & 0xFF0000) >> 16;
400
+		addr[1] = (StartAddr & 0xFF00) >> 8;
401
+		addr[2] = StartAddr & 0xFF;
402
+	}
403
+
404
+	I2C_Write_Byte(lt7911d, 0x5a, 0x8a);
405
+	I2C_Write_Byte(lt7911d, 0x5a, 0x82);
406
+}
407
+
408
+static int lt7911_compare_firmware(struct lt7911d *lt7911d)
409
+{
410
+	unsigned int len;
411
+
412
+	for (len = 0; len < Datalen; len++) {
413
+		if (ReadFirmware[len] != FirmwareData[len]) {
414
+			pr_info("%s: ReadFirmware[%d] 0x%x !=  0x%x FirmwareData[%d]\n",
415
+					__func__, len, ReadFirmware[len], FirmwareData[len], len);
416
+			return -1;
417
+		}
418
+	}
419
+	return 0;
420
+}
421
+
422
+static int lt7911d_firmware_upgrade(struct lt7911d *lt7911d)
423
+{
424
+	int ret = 0;
425
+
426
+	if (lt7911d_check_chip_id(lt7911d)) {
427
+		if (lt7911d_check_fw_version(lt7911d) == 0) {
428
+			lt7911d_config_para(lt7911d);
429
+			SaveHdcpKeyFromFlash(lt7911d);
430
+			lt7911d_block_erase(lt7911d);
431
+			lt7911d_write_firmware_to_flash(lt7911d);
432
+			lt7911d_write_hdcpkey_to_flash(lt7911d);
433
+			lt7911d_read_firmware_from_flash(lt7911d);
434
+
435
+			if (!lt7911_compare_firmware(lt7911d)) {
436
+				pr_info("%s: upgrade success\n", __func__);
437
+				ret = 0;
438
+			} else {
439
+				pr_info("%s: upgrade Fail\n", __func__);
440
+				ret = -1;
441
+			}
442
+		}
443
+	} else {
444
+		pr_info("the chip lt7911d is offline\n");
445
+		ret = 0;
446
+	}
447
+
448
+	I2C_Write_Byte(lt7911d, 0xFF, 0x80);
449
+	I2C_Write_Byte(lt7911d, 0xEE, 0x00);
450
+
451
+	return ret;
452
+}
453
+
454
+static const struct regmap_config lt7911d_regmap_config = {
455
+	.name = "lt7911d",
456
+	.reg_bits = 8,
457
+	.val_bits = 8,
458
+	.max_register = 0x100,
21459 };
22460 
23461 static int lt7911d_fb_notifier_callback(struct notifier_block *self,
....@@ -26,7 +464,6 @@
26464 	struct lt7911d *lt7911d = container_of(self, struct lt7911d, fb_notif);
27465 	struct fb_event *evdata = data;
28466 	int fb_blank = *(int *)evdata->data;
29
-	int i;
30467 
31468 	if (event != FB_EVENT_BLANK)
32469 		return 0;
....@@ -35,12 +472,12 @@
35472 		return 0;
36473 
37474 	if (fb_blank == FB_BLANK_UNBLANK) {
38
-		for (i = 0; i < lt7911d->gpios->ndescs; i++)
39
-			gpiod_direction_output(lt7911d->gpios->desc[i], 1);
40
-		msleep(20);
41
-		for (i = 0; i < lt7911d->gpios->ndescs; i++)
42
-			gpiod_direction_output(lt7911d->gpios->desc[i], 0);
43
-		msleep(500);
475
+		if (lt7911d->reset_gpio) {
476
+			gpiod_direction_output(lt7911d->reset_gpio, 1);
477
+			msleep(20);
478
+			gpiod_direction_output(lt7911d->reset_gpio, 0);
479
+			msleep(400);
480
+		}
44481 	}
45482 
46483 	lt7911d->fb_blank = fb_blank;
....@@ -48,26 +485,36 @@
48485 	return 0;
49486 }
50487 
51
-static int lt7911d_fb_notifier_probe(struct platform_device *pdev)
488
+static int lt7911d_i2c_probe(struct i2c_client *client,
489
+			      const struct i2c_device_id *id)
52490 {
53
-	struct device *dev = &pdev->dev;
491
+	struct device *dev = &client->dev;
54492 	struct lt7911d *lt7911d;
55
-	int i, ret;
493
+	int ret = 0, i = 0;
56494 
57495 	lt7911d = devm_kzalloc(dev, sizeof(*lt7911d), GFP_KERNEL);
58496 	if (!lt7911d)
59497 		return -ENOMEM;
60498 
61499 	lt7911d->dev = dev;
62
-	platform_set_drvdata(pdev, lt7911d);
500
+	i2c_set_clientdata(client, lt7911d);
63501 
64
-	lt7911d->gpios = devm_gpiod_get_array(dev, "reset", GPIOD_OUT_LOW);
65
-	if (IS_ERR(lt7911d->gpios))
66
-		return dev_err_probe(dev, PTR_ERR(lt7911d->gpios),
502
+	lt7911d->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
503
+	if (IS_ERR(lt7911d->reset_gpio))
504
+		return dev_err_probe(dev, PTR_ERR(lt7911d->reset_gpio),
67505 				     "failed to acquire reset gpio\n");
68506 
69
-	for (i = 0; i < lt7911d->gpios->ndescs; i++)
70
-		gpiod_set_consumer_name(lt7911d->gpios->desc[i], "lt7911d-reset");
507
+	gpiod_set_consumer_name(lt7911d->reset_gpio, "lt7911d-reset");
508
+
509
+	lt7911d->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
510
+	if (IS_ERR(lt7911d->enable_gpio))
511
+		return dev_err_probe(dev, PTR_ERR(lt7911d->enable_gpio),
512
+				     "failed to acquire enable gpio\n");
513
+
514
+	lt7911d->regmap = devm_regmap_init_i2c(client, &lt7911d_regmap_config);
515
+	if (IS_ERR(lt7911d->regmap))
516
+		return dev_err_probe(dev, PTR_ERR(lt7911d->regmap),
517
+				     "failed to initialize regmap\n");
71518 
72519 	lt7911d->fb_blank = FB_BLANK_UNBLANK;
73520 	lt7911d->fb_notif.notifier_call = lt7911d_fb_notifier_callback;
....@@ -75,45 +522,69 @@
75522 	if (ret)
76523 		return dev_err_probe(dev, ret, "failed to register fb client\n");
77524 
525
+	for (i = 0; i < 3; i++) {
526
+		if (!lt7911d_firmware_upgrade(lt7911d))
527
+			break;
528
+	}
529
+
530
+	dev_info(dev, "%s end\n", __func__);
531
+
78532 	return 0;
79533 }
80534 
81
-static int lt7911d_fb_notifier_remove(struct platform_device *pdev)
535
+static void lt7911d_i2c_shutdown(struct i2c_client *client)
82536 {
83
-	struct lt7911d *lt7911d = platform_get_drvdata(pdev);
537
+	struct lt7911d *lt7911d = i2c_get_clientdata(client);
538
+
539
+	gpiod_direction_output(lt7911d->reset_gpio, 1);
540
+	msleep(20);
541
+}
542
+
543
+static int lt7911d_i2c_remove(struct i2c_client *client)
544
+{
545
+	struct lt7911d *lt7911d = i2c_get_clientdata(client);
84546 
85547 	fb_unregister_client(&lt7911d->fb_notif);
86548 
87549 	return 0;
88550 }
89551 
90
-static void lt7911d_fb_notifier_shutdown(struct platform_device *pdev)
91
-{
92
-	struct lt7911d *lt7911d = platform_get_drvdata(pdev);
93
-	int i;
552
+static const struct i2c_device_id lt7911d_i2c_table[] = {
553
+	{ "lt7911d", 0 },
554
+	{}
555
+};
556
+MODULE_DEVICE_TABLE(i2c, lt7911d_i2c_table);
94557 
95
-	for (i = 0; i < lt7911d->gpios->ndescs; i++)
96
-		gpiod_direction_output(lt7911d->gpios->desc[i], 1);
97
-	msleep(20);
98
-}
99
-
100
-static const struct of_device_id lt7911d_fb_notifier_of_match[] = {
558
+static const struct of_device_id lt7911d_of_match[] = {
101559 	{ .compatible = "lontium,lt7911d-fb-notifier" },
102560 	{}
103561 };
104
-MODULE_DEVICE_TABLE(of, lt7911d_fb_notifier_of_match);
562
+MODULE_DEVICE_TABLE(of, lt7911d_of_match);
105563 
106
-static struct platform_driver lt7911d_fb_notifier_driver = {
564
+static struct i2c_driver lt7911d_i2c_driver = {
107565 	.driver = {
108
-		.name = "lt7911d-fb-notifier",
109
-		.of_match_table = lt7911d_fb_notifier_of_match,
566
+		.name = "lt7911d",
567
+		.of_match_table = lt7911d_of_match,
110568 	},
111
-	.probe = lt7911d_fb_notifier_probe,
112
-	.remove = lt7911d_fb_notifier_remove,
113
-	.shutdown = lt7911d_fb_notifier_shutdown,
569
+	.probe = lt7911d_i2c_probe,
570
+	.remove = lt7911d_i2c_remove,
571
+	.shutdown = lt7911d_i2c_shutdown,
572
+	.id_table = lt7911d_i2c_table,
114573 };
115574 
116
-module_platform_driver(lt7911d_fb_notifier_driver);
575
+static int __init lt7911d_i2c_driver_init(void)
576
+{
577
+	i2c_add_driver(&lt7911d_i2c_driver);
117578 
118
-MODULE_DESCRIPTION("Lontium LT7911D FB Notifier");
579
+	return 0;
580
+}
581
+subsys_initcall_sync(lt7911d_i2c_driver_init);
582
+
583
+static void __exit lt7911d_i2c_driver_exit(void)
584
+{
585
+	i2c_del_driver(&lt7911d_i2c_driver);
586
+}
587
+module_exit(lt7911d_i2c_driver_exit);
588
+
589
+MODULE_DESCRIPTION("Lontium lt7911dD driver");
119590 MODULE_LICENSE("GPL");