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b59320cc DJ |
1 | /* |
2 | * LP8755 High Performance Power Management Unit : System Interface Driver | |
3 | * (based on rev. 0.26) | |
4 | * Copyright 2012 Texas Instruments | |
5 | * | |
6 | * Author: Daniel(Geon Si) Jeong <daniel.jeong@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/irq.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/gpio.h> | |
21 | #include <linux/regmap.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/uaccess.h> | |
24 | #include <linux/regulator/driver.h> | |
25 | #include <linux/regulator/machine.h> | |
26 | #include <linux/platform_data/lp8755.h> | |
27 | ||
28 | #define LP8755_REG_BUCK0 0x00 | |
29 | #define LP8755_REG_BUCK1 0x03 | |
30 | #define LP8755_REG_BUCK2 0x04 | |
31 | #define LP8755_REG_BUCK3 0x01 | |
32 | #define LP8755_REG_BUCK4 0x05 | |
33 | #define LP8755_REG_BUCK5 0x02 | |
34 | #define LP8755_REG_MAX 0xFF | |
35 | ||
36 | #define LP8755_BUCK_EN_M BIT(7) | |
37 | #define LP8755_BUCK_LINEAR_OUT_MAX 0x76 | |
38 | #define LP8755_BUCK_VOUT_M 0x7F | |
39 | ||
40 | enum bucks { | |
41 | BUCK0 = 0, | |
42 | BUCK1, | |
43 | BUCK2, | |
44 | BUCK3, | |
45 | BUCK4, | |
46 | BUCK5, | |
47 | }; | |
48 | ||
49 | struct lp8755_mphase { | |
50 | int nreg; | |
51 | int buck_num[LP8755_BUCK_MAX]; | |
52 | }; | |
53 | ||
54 | struct lp8755_chip { | |
55 | struct device *dev; | |
56 | struct regmap *regmap; | |
57 | struct lp8755_platform_data *pdata; | |
58 | ||
59 | int irq; | |
60 | unsigned int irqmask; | |
61 | ||
62 | int mphase; | |
63 | struct regulator_dev *rdev[LP8755_BUCK_MAX]; | |
64 | }; | |
65 | ||
66 | /** | |
67 | *lp8755_read : read a single register value from lp8755. | |
68 | *@pchip : device to read from | |
69 | *@reg : register to read from | |
70 | *@val : pointer to store read value | |
71 | */ | |
72 | static int lp8755_read(struct lp8755_chip *pchip, unsigned int reg, | |
73 | unsigned int *val) | |
74 | { | |
75 | return regmap_read(pchip->regmap, reg, val); | |
76 | } | |
77 | ||
78 | /** | |
79 | *lp8755_write : write a single register value to lp8755. | |
80 | *@pchip : device to write to | |
81 | *@reg : register to write to | |
82 | *@val : value to be written | |
83 | */ | |
84 | static int lp8755_write(struct lp8755_chip *pchip, unsigned int reg, | |
85 | unsigned int val) | |
86 | { | |
87 | return regmap_write(pchip->regmap, reg, val); | |
88 | } | |
89 | ||
90 | /** | |
91 | *lp8755_update_bits : set the values of bit fields in lp8755 register. | |
92 | *@pchip : device to read from | |
93 | *@reg : register to update | |
94 | *@mask : bitmask to be changed | |
95 | *@val : value for bitmask | |
96 | */ | |
97 | static int lp8755_update_bits(struct lp8755_chip *pchip, unsigned int reg, | |
98 | unsigned int mask, unsigned int val) | |
99 | { | |
100 | return regmap_update_bits(pchip->regmap, reg, mask, val); | |
101 | } | |
102 | ||
103 | static int lp8755_buck_enable_time(struct regulator_dev *rdev) | |
104 | { | |
105 | int ret; | |
106 | unsigned int regval; | |
107 | enum lp8755_bucks id = rdev_get_id(rdev); | |
108 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
109 | ||
110 | ret = lp8755_read(pchip, 0x12 + id, ®val); | |
111 | if (ret < 0) { | |
112 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
113 | return ret; | |
114 | } | |
115 | return (regval & 0xff) * 100; | |
116 | } | |
117 | ||
118 | static int lp8755_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
119 | { | |
120 | int ret; | |
121 | unsigned int regbval = 0x0; | |
122 | enum lp8755_bucks id = rdev_get_id(rdev); | |
123 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
124 | ||
125 | switch (mode) { | |
126 | case REGULATOR_MODE_FAST: | |
127 | /* forced pwm mode */ | |
128 | regbval = (0x01 << id); | |
129 | break; | |
130 | case REGULATOR_MODE_NORMAL: | |
131 | /* enable automatic pwm/pfm mode */ | |
132 | ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x00); | |
133 | if (ret < 0) | |
134 | goto err_i2c; | |
135 | break; | |
136 | case REGULATOR_MODE_IDLE: | |
137 | /* enable automatic pwm/pfm/lppfm mode */ | |
138 | ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x20); | |
139 | if (ret < 0) | |
140 | goto err_i2c; | |
141 | ||
142 | ret = lp8755_update_bits(pchip, 0x10, 0x01, 0x01); | |
143 | if (ret < 0) | |
144 | goto err_i2c; | |
145 | break; | |
146 | default: | |
147 | dev_err(pchip->dev, "Not supported buck mode %s\n", __func__); | |
148 | /* forced pwm mode */ | |
149 | regbval = (0x01 << id); | |
150 | } | |
151 | ||
152 | ret = lp8755_update_bits(pchip, 0x06, 0x01 << id, regbval); | |
153 | if (ret < 0) | |
154 | goto err_i2c; | |
155 | return ret; | |
156 | err_i2c: | |
157 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
158 | return ret; | |
159 | } | |
160 | ||
161 | static unsigned int lp8755_buck_get_mode(struct regulator_dev *rdev) | |
162 | { | |
163 | int ret; | |
164 | unsigned int regval; | |
165 | enum lp8755_bucks id = rdev_get_id(rdev); | |
166 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
167 | ||
168 | ret = lp8755_read(pchip, 0x06, ®val); | |
169 | if (ret < 0) | |
170 | goto err_i2c; | |
171 | ||
172 | /* mode fast means forced pwm mode */ | |
173 | if (regval & (0x01 << id)) | |
174 | return REGULATOR_MODE_FAST; | |
175 | ||
176 | ret = lp8755_read(pchip, 0x08 + id, ®val); | |
177 | if (ret < 0) | |
178 | goto err_i2c; | |
179 | ||
180 | /* mode idle means automatic pwm/pfm/lppfm mode */ | |
181 | if (regval & 0x20) | |
182 | return REGULATOR_MODE_IDLE; | |
183 | ||
184 | /* mode normal means automatic pwm/pfm mode */ | |
185 | return REGULATOR_MODE_NORMAL; | |
186 | ||
187 | err_i2c: | |
188 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static int lp8755_buck_set_ramp(struct regulator_dev *rdev, int ramp) | |
193 | { | |
194 | int ret; | |
195 | unsigned int regval = 0x00; | |
196 | enum lp8755_bucks id = rdev_get_id(rdev); | |
197 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
198 | ||
199 | /* uV/us */ | |
200 | switch (ramp) { | |
201 | case 0 ... 230: | |
202 | regval = 0x07; | |
203 | break; | |
204 | case 231 ... 470: | |
205 | regval = 0x06; | |
206 | break; | |
207 | case 471 ... 940: | |
208 | regval = 0x05; | |
209 | break; | |
210 | case 941 ... 1900: | |
211 | regval = 0x04; | |
212 | break; | |
213 | case 1901 ... 3800: | |
214 | regval = 0x03; | |
215 | break; | |
216 | case 3801 ... 7500: | |
217 | regval = 0x02; | |
218 | break; | |
219 | case 7501 ... 15000: | |
220 | regval = 0x01; | |
221 | break; | |
222 | case 15001 ... 30000: | |
223 | regval = 0x00; | |
224 | break; | |
225 | default: | |
226 | dev_err(pchip->dev, | |
227 | "Not supported ramp value %d %s\n", ramp, __func__); | |
228 | return -EINVAL; | |
229 | } | |
230 | ||
231 | ret = lp8755_update_bits(pchip, 0x07 + id, 0x07, regval); | |
232 | if (ret < 0) | |
233 | goto err_i2c; | |
234 | return ret; | |
235 | err_i2c: | |
236 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | static struct regulator_ops lp8755_buck_ops = { | |
241 | .list_voltage = regulator_list_voltage_linear, | |
242 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
243 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
244 | .enable = regulator_enable_regmap, | |
245 | .disable = regulator_disable_regmap, | |
246 | .is_enabled = regulator_is_enabled_regmap, | |
247 | .enable_time = lp8755_buck_enable_time, | |
248 | .set_mode = lp8755_buck_set_mode, | |
249 | .get_mode = lp8755_buck_get_mode, | |
250 | .set_ramp_delay = lp8755_buck_set_ramp, | |
251 | }; | |
252 | ||
253 | #define lp8755_rail(_id) "lp8755_buck"#_id | |
254 | #define lp8755_buck_init(_id)\ | |
255 | {\ | |
256 | .constraints = {\ | |
257 | .name = lp8755_rail(_id),\ | |
258 | .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,\ | |
259 | .min_uV = 500000,\ | |
260 | .max_uV = 1675000,\ | |
261 | },\ | |
262 | } | |
263 | ||
264 | static struct regulator_init_data lp8755_reg_default[LP8755_BUCK_MAX] = { | |
265 | [BUCK0] = lp8755_buck_init(0), | |
266 | [BUCK1] = lp8755_buck_init(1), | |
267 | [BUCK2] = lp8755_buck_init(2), | |
268 | [BUCK3] = lp8755_buck_init(3), | |
269 | [BUCK4] = lp8755_buck_init(4), | |
270 | [BUCK5] = lp8755_buck_init(5), | |
271 | }; | |
272 | ||
273 | static const struct lp8755_mphase mphase_buck[MPHASE_CONF_MAX] = { | |
274 | {3, {BUCK0, BUCK3, BUCK5} | |
275 | }, | |
276 | {6, {BUCK0, BUCK1, BUCK2, BUCK3, BUCK4, BUCK5} | |
277 | }, | |
278 | {5, {BUCK0, BUCK2, BUCK3, BUCK4, BUCK5} | |
279 | }, | |
280 | {4, {BUCK0, BUCK3, BUCK4, BUCK5} | |
281 | }, | |
282 | {3, {BUCK0, BUCK4, BUCK5} | |
283 | }, | |
284 | {2, {BUCK0, BUCK5} | |
285 | }, | |
286 | {1, {BUCK0} | |
287 | }, | |
288 | {2, {BUCK0, BUCK3} | |
289 | }, | |
290 | {4, {BUCK0, BUCK2, BUCK3, BUCK5} | |
291 | }, | |
292 | }; | |
293 | ||
294 | static int lp8755_init_data(struct lp8755_chip *pchip) | |
295 | { | |
296 | unsigned int regval; | |
297 | int ret, icnt, buck_num; | |
298 | struct lp8755_platform_data *pdata = pchip->pdata; | |
299 | ||
300 | /* read back muti-phase configuration */ | |
301 | ret = lp8755_read(pchip, 0x3D, ®val); | |
302 | if (ret < 0) | |
303 | goto out_i2c_error; | |
cad877ef | 304 | pchip->mphase = regval & 0x0F; |
b59320cc DJ |
305 | |
306 | /* set default data based on multi-phase config */ | |
307 | for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) { | |
308 | buck_num = mphase_buck[pchip->mphase].buck_num[icnt]; | |
309 | pdata->buck_data[buck_num] = &lp8755_reg_default[buck_num]; | |
310 | } | |
311 | return ret; | |
312 | ||
313 | out_i2c_error: | |
314 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | #define lp8755_buck_desc(_id)\ | |
319 | {\ | |
320 | .name = lp8755_rail(_id),\ | |
321 | .id = LP8755_BUCK##_id,\ | |
322 | .ops = &lp8755_buck_ops,\ | |
323 | .n_voltages = LP8755_BUCK_LINEAR_OUT_MAX+1,\ | |
324 | .uV_step = 10000,\ | |
325 | .min_uV = 500000,\ | |
326 | .type = REGULATOR_VOLTAGE,\ | |
327 | .owner = THIS_MODULE,\ | |
328 | .enable_reg = LP8755_REG_BUCK##_id,\ | |
329 | .enable_mask = LP8755_BUCK_EN_M,\ | |
330 | .vsel_reg = LP8755_REG_BUCK##_id,\ | |
331 | .vsel_mask = LP8755_BUCK_VOUT_M,\ | |
332 | } | |
333 | ||
334 | static struct regulator_desc lp8755_regulators[] = { | |
335 | lp8755_buck_desc(0), | |
336 | lp8755_buck_desc(1), | |
337 | lp8755_buck_desc(2), | |
338 | lp8755_buck_desc(3), | |
339 | lp8755_buck_desc(4), | |
340 | lp8755_buck_desc(5), | |
341 | }; | |
342 | ||
343 | static int lp8755_regulator_init(struct lp8755_chip *pchip) | |
344 | { | |
345 | int ret, icnt, buck_num; | |
346 | struct lp8755_platform_data *pdata = pchip->pdata; | |
347 | struct regulator_config rconfig = { }; | |
348 | ||
349 | rconfig.regmap = pchip->regmap; | |
350 | rconfig.dev = pchip->dev; | |
351 | rconfig.driver_data = pchip; | |
352 | ||
353 | for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) { | |
354 | buck_num = mphase_buck[pchip->mphase].buck_num[icnt]; | |
355 | rconfig.init_data = pdata->buck_data[buck_num]; | |
356 | rconfig.of_node = pchip->dev->of_node; | |
357 | pchip->rdev[buck_num] = | |
358 | regulator_register(&lp8755_regulators[buck_num], &rconfig); | |
359 | if (IS_ERR(pchip->rdev[buck_num])) { | |
360 | ret = PTR_ERR(pchip->rdev[buck_num]); | |
a1a41ab4 AL |
361 | pchip->rdev[buck_num] = NULL; |
362 | dev_err(pchip->dev, "regulator init failed: buck %d\n", | |
363 | buck_num); | |
b59320cc DJ |
364 | goto err_buck; |
365 | } | |
366 | } | |
367 | ||
368 | return 0; | |
369 | ||
370 | err_buck: | |
371 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) | |
a1a41ab4 | 372 | regulator_unregister(pchip->rdev[icnt]); |
b59320cc DJ |
373 | return ret; |
374 | } | |
375 | ||
376 | static irqreturn_t lp8755_irq_handler(int irq, void *data) | |
377 | { | |
378 | int ret, icnt; | |
379 | unsigned int flag0, flag1; | |
380 | struct lp8755_chip *pchip = data; | |
381 | ||
382 | /* read flag0 register */ | |
383 | ret = lp8755_read(pchip, 0x0D, &flag0); | |
384 | if (ret < 0) | |
385 | goto err_i2c; | |
386 | /* clear flag register to pull up int. pin */ | |
387 | ret = lp8755_write(pchip, 0x0D, 0x00); | |
388 | if (ret < 0) | |
389 | goto err_i2c; | |
390 | ||
391 | /* sent power fault detection event to specific regulator */ | |
392 | for (icnt = 0; icnt < 6; icnt++) | |
393 | if ((flag0 & (0x4 << icnt)) | |
394 | && (pchip->irqmask & (0x04 << icnt)) | |
395 | && (pchip->rdev[icnt] != NULL)) | |
396 | regulator_notifier_call_chain(pchip->rdev[icnt], | |
397 | LP8755_EVENT_PWR_FAULT, | |
398 | NULL); | |
399 | ||
400 | /* read flag1 register */ | |
401 | ret = lp8755_read(pchip, 0x0E, &flag1); | |
402 | if (ret < 0) | |
403 | goto err_i2c; | |
404 | /* clear flag register to pull up int. pin */ | |
405 | ret = lp8755_write(pchip, 0x0E, 0x00); | |
406 | if (ret < 0) | |
407 | goto err_i2c; | |
408 | ||
409 | /* send OCP event to all regualtor devices */ | |
410 | if ((flag1 & 0x01) && (pchip->irqmask & 0x01)) | |
411 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) | |
412 | if (pchip->rdev[icnt] != NULL) | |
413 | regulator_notifier_call_chain(pchip->rdev[icnt], | |
414 | LP8755_EVENT_OCP, | |
415 | NULL); | |
416 | ||
417 | /* send OVP event to all regualtor devices */ | |
418 | if ((flag1 & 0x02) && (pchip->irqmask & 0x02)) | |
419 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) | |
420 | if (pchip->rdev[icnt] != NULL) | |
421 | regulator_notifier_call_chain(pchip->rdev[icnt], | |
422 | LP8755_EVENT_OVP, | |
423 | NULL); | |
424 | return IRQ_HANDLED; | |
425 | ||
426 | err_i2c: | |
427 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
428 | return IRQ_NONE; | |
429 | } | |
430 | ||
431 | static int lp8755_int_config(struct lp8755_chip *pchip) | |
432 | { | |
433 | int ret; | |
434 | unsigned int regval; | |
435 | ||
436 | if (pchip->irq == 0) { | |
437 | dev_warn(pchip->dev, "not use interrupt : %s\n", __func__); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | ret = lp8755_read(pchip, 0x0F, ®val); | |
442 | if (ret < 0) | |
443 | goto err_i2c; | |
444 | pchip->irqmask = regval; | |
445 | ret = request_threaded_irq(pchip->irq, NULL, lp8755_irq_handler, | |
446 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
447 | "lp8755-irq", pchip); | |
448 | if (ret) | |
449 | return ret; | |
450 | ||
451 | return ret; | |
452 | ||
453 | err_i2c: | |
454 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
455 | return ret; | |
456 | } | |
457 | ||
458 | static const struct regmap_config lp8755_regmap = { | |
459 | .reg_bits = 8, | |
460 | .val_bits = 8, | |
461 | .max_register = LP8755_REG_MAX, | |
462 | }; | |
463 | ||
464 | static int lp8755_probe(struct i2c_client *client, | |
465 | const struct i2c_device_id *id) | |
466 | { | |
467 | int ret, icnt; | |
468 | struct lp8755_chip *pchip; | |
469 | struct lp8755_platform_data *pdata = client->dev.platform_data; | |
470 | ||
471 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
472 | dev_err(&client->dev, "i2c functionality check fail.\n"); | |
473 | return -EOPNOTSUPP; | |
474 | } | |
475 | ||
476 | pchip = devm_kzalloc(&client->dev, | |
477 | sizeof(struct lp8755_chip), GFP_KERNEL); | |
478 | if (!pchip) | |
479 | return -ENOMEM; | |
480 | ||
481 | pchip->dev = &client->dev; | |
482 | pchip->regmap = devm_regmap_init_i2c(client, &lp8755_regmap); | |
483 | if (IS_ERR(pchip->regmap)) { | |
484 | ret = PTR_ERR(pchip->regmap); | |
485 | dev_err(&client->dev, "fail to allocate regmap %d\n", ret); | |
486 | return ret; | |
487 | } | |
488 | i2c_set_clientdata(client, pchip); | |
489 | ||
490 | if (pdata != NULL) { | |
491 | pchip->pdata = pdata; | |
492 | pchip->mphase = pdata->mphase; | |
493 | } else { | |
494 | pchip->pdata = devm_kzalloc(pchip->dev, | |
495 | sizeof(struct lp8755_platform_data), | |
496 | GFP_KERNEL); | |
497 | if (!pchip->pdata) | |
498 | return -ENOMEM; | |
499 | ret = lp8755_init_data(pchip); | |
500 | if (ret < 0) | |
501 | goto err_chip_init; | |
502 | } | |
503 | ||
504 | ret = lp8755_regulator_init(pchip); | |
505 | if (ret < 0) | |
506 | goto err_regulator; | |
507 | ||
508 | pchip->irq = client->irq; | |
509 | ret = lp8755_int_config(pchip); | |
510 | if (ret < 0) | |
511 | goto err_irq; | |
512 | ||
513 | return ret; | |
514 | ||
515 | err_irq: | |
516 | dev_err(&client->dev, "fail to irq config\n"); | |
517 | ||
518 | for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) | |
519 | regulator_unregister(pchip->rdev[icnt]); | |
520 | ||
521 | err_regulator: | |
522 | dev_err(&client->dev, "fail to initialize regulators\n"); | |
523 | /* output disable */ | |
524 | for (icnt = 0; icnt < 0x06; icnt++) | |
525 | lp8755_write(pchip, icnt, 0x00); | |
526 | ||
527 | err_chip_init: | |
528 | dev_err(&client->dev, "fail to initialize chip\n"); | |
529 | return ret; | |
530 | } | |
531 | ||
532 | static int lp8755_remove(struct i2c_client *client) | |
533 | { | |
534 | int icnt; | |
535 | struct lp8755_chip *pchip = i2c_get_clientdata(client); | |
536 | ||
537 | for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) | |
538 | regulator_unregister(pchip->rdev[icnt]); | |
539 | ||
540 | for (icnt = 0; icnt < 0x06; icnt++) | |
541 | lp8755_write(pchip, icnt, 0x00); | |
542 | ||
543 | if (pchip->irq != 0) | |
544 | free_irq(pchip->irq, pchip); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static const struct i2c_device_id lp8755_id[] = { | |
550 | {LP8755_NAME, 0}, | |
551 | {} | |
552 | }; | |
553 | ||
554 | MODULE_DEVICE_TABLE(i2c, lp8755_id); | |
555 | ||
556 | static struct i2c_driver lp8755_i2c_driver = { | |
557 | .driver = { | |
558 | .name = LP8755_NAME, | |
559 | }, | |
560 | .probe = lp8755_probe, | |
a1a41ab4 | 561 | .remove = lp8755_remove, |
b59320cc DJ |
562 | .id_table = lp8755_id, |
563 | }; | |
564 | ||
565 | static int __init lp8755_init(void) | |
566 | { | |
567 | return i2c_add_driver(&lp8755_i2c_driver); | |
568 | } | |
569 | ||
570 | subsys_initcall(lp8755_init); | |
571 | ||
572 | static void __exit lp8755_exit(void) | |
573 | { | |
574 | i2c_del_driver(&lp8755_i2c_driver); | |
575 | } | |
576 | ||
577 | module_exit(lp8755_exit); | |
578 | ||
579 | MODULE_DESCRIPTION("Texas Instruments lp8755 driver"); | |
580 | MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>"); | |
581 | MODULE_LICENSE("GPL v2"); |