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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> | |
b59320cc DJ |
22 | #include <linux/uaccess.h> |
23 | #include <linux/regulator/driver.h> | |
24 | #include <linux/regulator/machine.h> | |
25 | #include <linux/platform_data/lp8755.h> | |
26 | ||
27 | #define LP8755_REG_BUCK0 0x00 | |
28 | #define LP8755_REG_BUCK1 0x03 | |
29 | #define LP8755_REG_BUCK2 0x04 | |
30 | #define LP8755_REG_BUCK3 0x01 | |
31 | #define LP8755_REG_BUCK4 0x05 | |
32 | #define LP8755_REG_BUCK5 0x02 | |
33 | #define LP8755_REG_MAX 0xFF | |
34 | ||
35 | #define LP8755_BUCK_EN_M BIT(7) | |
36 | #define LP8755_BUCK_LINEAR_OUT_MAX 0x76 | |
37 | #define LP8755_BUCK_VOUT_M 0x7F | |
38 | ||
b59320cc DJ |
39 | struct lp8755_mphase { |
40 | int nreg; | |
41 | int buck_num[LP8755_BUCK_MAX]; | |
42 | }; | |
43 | ||
44 | struct lp8755_chip { | |
45 | struct device *dev; | |
46 | struct regmap *regmap; | |
47 | struct lp8755_platform_data *pdata; | |
48 | ||
49 | int irq; | |
50 | unsigned int irqmask; | |
51 | ||
52 | int mphase; | |
53 | struct regulator_dev *rdev[LP8755_BUCK_MAX]; | |
54 | }; | |
55 | ||
56 | /** | |
57 | *lp8755_read : read a single register value from lp8755. | |
58 | *@pchip : device to read from | |
59 | *@reg : register to read from | |
60 | *@val : pointer to store read value | |
61 | */ | |
62 | static int lp8755_read(struct lp8755_chip *pchip, unsigned int reg, | |
63 | unsigned int *val) | |
64 | { | |
65 | return regmap_read(pchip->regmap, reg, val); | |
66 | } | |
67 | ||
68 | /** | |
69 | *lp8755_write : write a single register value to lp8755. | |
70 | *@pchip : device to write to | |
71 | *@reg : register to write to | |
72 | *@val : value to be written | |
73 | */ | |
74 | static int lp8755_write(struct lp8755_chip *pchip, unsigned int reg, | |
75 | unsigned int val) | |
76 | { | |
77 | return regmap_write(pchip->regmap, reg, val); | |
78 | } | |
79 | ||
80 | /** | |
81 | *lp8755_update_bits : set the values of bit fields in lp8755 register. | |
82 | *@pchip : device to read from | |
83 | *@reg : register to update | |
84 | *@mask : bitmask to be changed | |
85 | *@val : value for bitmask | |
86 | */ | |
87 | static int lp8755_update_bits(struct lp8755_chip *pchip, unsigned int reg, | |
88 | unsigned int mask, unsigned int val) | |
89 | { | |
90 | return regmap_update_bits(pchip->regmap, reg, mask, val); | |
91 | } | |
92 | ||
93 | static int lp8755_buck_enable_time(struct regulator_dev *rdev) | |
94 | { | |
95 | int ret; | |
96 | unsigned int regval; | |
97 | enum lp8755_bucks id = rdev_get_id(rdev); | |
98 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
99 | ||
100 | ret = lp8755_read(pchip, 0x12 + id, ®val); | |
101 | if (ret < 0) { | |
102 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
103 | return ret; | |
104 | } | |
105 | return (regval & 0xff) * 100; | |
106 | } | |
107 | ||
108 | static int lp8755_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
109 | { | |
110 | int ret; | |
111 | unsigned int regbval = 0x0; | |
112 | enum lp8755_bucks id = rdev_get_id(rdev); | |
113 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
114 | ||
115 | switch (mode) { | |
116 | case REGULATOR_MODE_FAST: | |
117 | /* forced pwm mode */ | |
118 | regbval = (0x01 << id); | |
119 | break; | |
120 | case REGULATOR_MODE_NORMAL: | |
121 | /* enable automatic pwm/pfm mode */ | |
122 | ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x00); | |
123 | if (ret < 0) | |
124 | goto err_i2c; | |
125 | break; | |
126 | case REGULATOR_MODE_IDLE: | |
127 | /* enable automatic pwm/pfm/lppfm mode */ | |
128 | ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x20); | |
129 | if (ret < 0) | |
130 | goto err_i2c; | |
131 | ||
132 | ret = lp8755_update_bits(pchip, 0x10, 0x01, 0x01); | |
133 | if (ret < 0) | |
134 | goto err_i2c; | |
135 | break; | |
136 | default: | |
137 | dev_err(pchip->dev, "Not supported buck mode %s\n", __func__); | |
138 | /* forced pwm mode */ | |
139 | regbval = (0x01 << id); | |
140 | } | |
141 | ||
142 | ret = lp8755_update_bits(pchip, 0x06, 0x01 << id, regbval); | |
143 | if (ret < 0) | |
144 | goto err_i2c; | |
145 | return ret; | |
146 | err_i2c: | |
147 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
148 | return ret; | |
149 | } | |
150 | ||
151 | static unsigned int lp8755_buck_get_mode(struct regulator_dev *rdev) | |
152 | { | |
153 | int ret; | |
154 | unsigned int regval; | |
155 | enum lp8755_bucks id = rdev_get_id(rdev); | |
156 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
157 | ||
158 | ret = lp8755_read(pchip, 0x06, ®val); | |
159 | if (ret < 0) | |
160 | goto err_i2c; | |
161 | ||
162 | /* mode fast means forced pwm mode */ | |
163 | if (regval & (0x01 << id)) | |
164 | return REGULATOR_MODE_FAST; | |
165 | ||
166 | ret = lp8755_read(pchip, 0x08 + id, ®val); | |
167 | if (ret < 0) | |
168 | goto err_i2c; | |
169 | ||
170 | /* mode idle means automatic pwm/pfm/lppfm mode */ | |
171 | if (regval & 0x20) | |
172 | return REGULATOR_MODE_IDLE; | |
173 | ||
174 | /* mode normal means automatic pwm/pfm mode */ | |
175 | return REGULATOR_MODE_NORMAL; | |
176 | ||
177 | err_i2c: | |
178 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int lp8755_buck_set_ramp(struct regulator_dev *rdev, int ramp) | |
183 | { | |
184 | int ret; | |
185 | unsigned int regval = 0x00; | |
186 | enum lp8755_bucks id = rdev_get_id(rdev); | |
187 | struct lp8755_chip *pchip = rdev_get_drvdata(rdev); | |
188 | ||
189 | /* uV/us */ | |
190 | switch (ramp) { | |
191 | case 0 ... 230: | |
192 | regval = 0x07; | |
193 | break; | |
194 | case 231 ... 470: | |
195 | regval = 0x06; | |
196 | break; | |
197 | case 471 ... 940: | |
198 | regval = 0x05; | |
199 | break; | |
200 | case 941 ... 1900: | |
201 | regval = 0x04; | |
202 | break; | |
203 | case 1901 ... 3800: | |
204 | regval = 0x03; | |
205 | break; | |
206 | case 3801 ... 7500: | |
207 | regval = 0x02; | |
208 | break; | |
209 | case 7501 ... 15000: | |
210 | regval = 0x01; | |
211 | break; | |
212 | case 15001 ... 30000: | |
213 | regval = 0x00; | |
214 | break; | |
215 | default: | |
216 | dev_err(pchip->dev, | |
217 | "Not supported ramp value %d %s\n", ramp, __func__); | |
218 | return -EINVAL; | |
219 | } | |
220 | ||
221 | ret = lp8755_update_bits(pchip, 0x07 + id, 0x07, regval); | |
222 | if (ret < 0) | |
223 | goto err_i2c; | |
224 | return ret; | |
225 | err_i2c: | |
226 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
227 | return ret; | |
228 | } | |
229 | ||
d42797a4 | 230 | static const struct regulator_ops lp8755_buck_ops = { |
56a942e9 | 231 | .map_voltage = regulator_map_voltage_linear, |
b59320cc DJ |
232 | .list_voltage = regulator_list_voltage_linear, |
233 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
234 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
235 | .enable = regulator_enable_regmap, | |
236 | .disable = regulator_disable_regmap, | |
237 | .is_enabled = regulator_is_enabled_regmap, | |
238 | .enable_time = lp8755_buck_enable_time, | |
239 | .set_mode = lp8755_buck_set_mode, | |
240 | .get_mode = lp8755_buck_get_mode, | |
241 | .set_ramp_delay = lp8755_buck_set_ramp, | |
242 | }; | |
243 | ||
244 | #define lp8755_rail(_id) "lp8755_buck"#_id | |
245 | #define lp8755_buck_init(_id)\ | |
246 | {\ | |
247 | .constraints = {\ | |
248 | .name = lp8755_rail(_id),\ | |
249 | .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,\ | |
250 | .min_uV = 500000,\ | |
251 | .max_uV = 1675000,\ | |
252 | },\ | |
253 | } | |
254 | ||
255 | static struct regulator_init_data lp8755_reg_default[LP8755_BUCK_MAX] = { | |
510799ea AL |
256 | [LP8755_BUCK0] = lp8755_buck_init(0), |
257 | [LP8755_BUCK1] = lp8755_buck_init(1), | |
258 | [LP8755_BUCK2] = lp8755_buck_init(2), | |
259 | [LP8755_BUCK3] = lp8755_buck_init(3), | |
260 | [LP8755_BUCK4] = lp8755_buck_init(4), | |
261 | [LP8755_BUCK5] = lp8755_buck_init(5), | |
b59320cc DJ |
262 | }; |
263 | ||
264 | static const struct lp8755_mphase mphase_buck[MPHASE_CONF_MAX] = { | |
510799ea AL |
265 | { 3, { LP8755_BUCK0, LP8755_BUCK3, LP8755_BUCK5 } }, |
266 | { 6, { LP8755_BUCK0, LP8755_BUCK1, LP8755_BUCK2, LP8755_BUCK3, | |
267 | LP8755_BUCK4, LP8755_BUCK5 } }, | |
268 | { 5, { LP8755_BUCK0, LP8755_BUCK2, LP8755_BUCK3, LP8755_BUCK4, | |
269 | LP8755_BUCK5} }, | |
270 | { 4, { LP8755_BUCK0, LP8755_BUCK3, LP8755_BUCK4, LP8755_BUCK5} }, | |
271 | { 3, { LP8755_BUCK0, LP8755_BUCK4, LP8755_BUCK5} }, | |
272 | { 2, { LP8755_BUCK0, LP8755_BUCK5} }, | |
273 | { 1, { LP8755_BUCK0} }, | |
274 | { 2, { LP8755_BUCK0, LP8755_BUCK3} }, | |
275 | { 4, { LP8755_BUCK0, LP8755_BUCK2, LP8755_BUCK3, LP8755_BUCK5} }, | |
b59320cc DJ |
276 | }; |
277 | ||
278 | static int lp8755_init_data(struct lp8755_chip *pchip) | |
279 | { | |
280 | unsigned int regval; | |
281 | int ret, icnt, buck_num; | |
282 | struct lp8755_platform_data *pdata = pchip->pdata; | |
283 | ||
284 | /* read back muti-phase configuration */ | |
285 | ret = lp8755_read(pchip, 0x3D, ®val); | |
286 | if (ret < 0) | |
287 | goto out_i2c_error; | |
cad877ef | 288 | pchip->mphase = regval & 0x0F; |
b59320cc DJ |
289 | |
290 | /* set default data based on multi-phase config */ | |
291 | for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) { | |
292 | buck_num = mphase_buck[pchip->mphase].buck_num[icnt]; | |
293 | pdata->buck_data[buck_num] = &lp8755_reg_default[buck_num]; | |
294 | } | |
295 | return ret; | |
296 | ||
297 | out_i2c_error: | |
298 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
299 | return ret; | |
300 | } | |
301 | ||
302 | #define lp8755_buck_desc(_id)\ | |
303 | {\ | |
304 | .name = lp8755_rail(_id),\ | |
305 | .id = LP8755_BUCK##_id,\ | |
306 | .ops = &lp8755_buck_ops,\ | |
307 | .n_voltages = LP8755_BUCK_LINEAR_OUT_MAX+1,\ | |
308 | .uV_step = 10000,\ | |
309 | .min_uV = 500000,\ | |
310 | .type = REGULATOR_VOLTAGE,\ | |
311 | .owner = THIS_MODULE,\ | |
312 | .enable_reg = LP8755_REG_BUCK##_id,\ | |
313 | .enable_mask = LP8755_BUCK_EN_M,\ | |
314 | .vsel_reg = LP8755_REG_BUCK##_id,\ | |
315 | .vsel_mask = LP8755_BUCK_VOUT_M,\ | |
316 | } | |
317 | ||
318 | static struct regulator_desc lp8755_regulators[] = { | |
319 | lp8755_buck_desc(0), | |
320 | lp8755_buck_desc(1), | |
321 | lp8755_buck_desc(2), | |
322 | lp8755_buck_desc(3), | |
323 | lp8755_buck_desc(4), | |
324 | lp8755_buck_desc(5), | |
325 | }; | |
326 | ||
327 | static int lp8755_regulator_init(struct lp8755_chip *pchip) | |
328 | { | |
329 | int ret, icnt, buck_num; | |
330 | struct lp8755_platform_data *pdata = pchip->pdata; | |
331 | struct regulator_config rconfig = { }; | |
332 | ||
333 | rconfig.regmap = pchip->regmap; | |
334 | rconfig.dev = pchip->dev; | |
335 | rconfig.driver_data = pchip; | |
336 | ||
337 | for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) { | |
338 | buck_num = mphase_buck[pchip->mphase].buck_num[icnt]; | |
339 | rconfig.init_data = pdata->buck_data[buck_num]; | |
340 | rconfig.of_node = pchip->dev->of_node; | |
341 | pchip->rdev[buck_num] = | |
57135250 HS |
342 | devm_regulator_register(pchip->dev, |
343 | &lp8755_regulators[buck_num], &rconfig); | |
b59320cc DJ |
344 | if (IS_ERR(pchip->rdev[buck_num])) { |
345 | ret = PTR_ERR(pchip->rdev[buck_num]); | |
a1a41ab4 AL |
346 | pchip->rdev[buck_num] = NULL; |
347 | dev_err(pchip->dev, "regulator init failed: buck %d\n", | |
348 | buck_num); | |
57135250 | 349 | return ret; |
b59320cc DJ |
350 | } |
351 | } | |
352 | ||
353 | return 0; | |
b59320cc DJ |
354 | } |
355 | ||
356 | static irqreturn_t lp8755_irq_handler(int irq, void *data) | |
357 | { | |
358 | int ret, icnt; | |
359 | unsigned int flag0, flag1; | |
360 | struct lp8755_chip *pchip = data; | |
361 | ||
362 | /* read flag0 register */ | |
363 | ret = lp8755_read(pchip, 0x0D, &flag0); | |
364 | if (ret < 0) | |
365 | goto err_i2c; | |
366 | /* clear flag register to pull up int. pin */ | |
367 | ret = lp8755_write(pchip, 0x0D, 0x00); | |
368 | if (ret < 0) | |
369 | goto err_i2c; | |
370 | ||
371 | /* sent power fault detection event to specific regulator */ | |
1200c60b | 372 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) |
b59320cc DJ |
373 | if ((flag0 & (0x4 << icnt)) |
374 | && (pchip->irqmask & (0x04 << icnt)) | |
375 | && (pchip->rdev[icnt] != NULL)) | |
376 | regulator_notifier_call_chain(pchip->rdev[icnt], | |
377 | LP8755_EVENT_PWR_FAULT, | |
378 | NULL); | |
379 | ||
380 | /* read flag1 register */ | |
381 | ret = lp8755_read(pchip, 0x0E, &flag1); | |
382 | if (ret < 0) | |
383 | goto err_i2c; | |
384 | /* clear flag register to pull up int. pin */ | |
385 | ret = lp8755_write(pchip, 0x0E, 0x00); | |
386 | if (ret < 0) | |
387 | goto err_i2c; | |
388 | ||
389 | /* send OCP event to all regualtor devices */ | |
390 | if ((flag1 & 0x01) && (pchip->irqmask & 0x01)) | |
391 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) | |
392 | if (pchip->rdev[icnt] != NULL) | |
393 | regulator_notifier_call_chain(pchip->rdev[icnt], | |
394 | LP8755_EVENT_OCP, | |
395 | NULL); | |
396 | ||
397 | /* send OVP event to all regualtor devices */ | |
398 | if ((flag1 & 0x02) && (pchip->irqmask & 0x02)) | |
399 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) | |
400 | if (pchip->rdev[icnt] != NULL) | |
401 | regulator_notifier_call_chain(pchip->rdev[icnt], | |
402 | LP8755_EVENT_OVP, | |
403 | NULL); | |
404 | return IRQ_HANDLED; | |
405 | ||
406 | err_i2c: | |
407 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
408 | return IRQ_NONE; | |
409 | } | |
410 | ||
411 | static int lp8755_int_config(struct lp8755_chip *pchip) | |
412 | { | |
413 | int ret; | |
414 | unsigned int regval; | |
415 | ||
416 | if (pchip->irq == 0) { | |
417 | dev_warn(pchip->dev, "not use interrupt : %s\n", __func__); | |
418 | return 0; | |
419 | } | |
420 | ||
421 | ret = lp8755_read(pchip, 0x0F, ®val); | |
840499aa AL |
422 | if (ret < 0) { |
423 | dev_err(pchip->dev, "i2c acceess error %s\n", __func__); | |
b59320cc | 424 | return ret; |
840499aa | 425 | } |
b59320cc | 426 | |
840499aa AL |
427 | pchip->irqmask = regval; |
428 | return devm_request_threaded_irq(pchip->dev, pchip->irq, NULL, | |
429 | lp8755_irq_handler, | |
430 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
431 | "lp8755-irq", pchip); | |
b59320cc DJ |
432 | } |
433 | ||
434 | static const struct regmap_config lp8755_regmap = { | |
435 | .reg_bits = 8, | |
436 | .val_bits = 8, | |
437 | .max_register = LP8755_REG_MAX, | |
438 | }; | |
439 | ||
440 | static int lp8755_probe(struct i2c_client *client, | |
441 | const struct i2c_device_id *id) | |
442 | { | |
443 | int ret, icnt; | |
444 | struct lp8755_chip *pchip; | |
dff91d0b | 445 | struct lp8755_platform_data *pdata = dev_get_platdata(&client->dev); |
b59320cc DJ |
446 | |
447 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
448 | dev_err(&client->dev, "i2c functionality check fail.\n"); | |
449 | return -EOPNOTSUPP; | |
450 | } | |
451 | ||
452 | pchip = devm_kzalloc(&client->dev, | |
453 | sizeof(struct lp8755_chip), GFP_KERNEL); | |
454 | if (!pchip) | |
455 | return -ENOMEM; | |
456 | ||
457 | pchip->dev = &client->dev; | |
458 | pchip->regmap = devm_regmap_init_i2c(client, &lp8755_regmap); | |
459 | if (IS_ERR(pchip->regmap)) { | |
460 | ret = PTR_ERR(pchip->regmap); | |
461 | dev_err(&client->dev, "fail to allocate regmap %d\n", ret); | |
462 | return ret; | |
463 | } | |
464 | i2c_set_clientdata(client, pchip); | |
465 | ||
466 | if (pdata != NULL) { | |
467 | pchip->pdata = pdata; | |
468 | pchip->mphase = pdata->mphase; | |
469 | } else { | |
470 | pchip->pdata = devm_kzalloc(pchip->dev, | |
471 | sizeof(struct lp8755_platform_data), | |
472 | GFP_KERNEL); | |
473 | if (!pchip->pdata) | |
474 | return -ENOMEM; | |
475 | ret = lp8755_init_data(pchip); | |
240a5291 AL |
476 | if (ret < 0) { |
477 | dev_err(&client->dev, "fail to initialize chip\n"); | |
478 | return ret; | |
479 | } | |
b59320cc DJ |
480 | } |
481 | ||
482 | ret = lp8755_regulator_init(pchip); | |
240a5291 AL |
483 | if (ret < 0) { |
484 | dev_err(&client->dev, "fail to initialize regulators\n"); | |
57135250 | 485 | goto err; |
240a5291 | 486 | } |
b59320cc DJ |
487 | |
488 | pchip->irq = client->irq; | |
489 | ret = lp8755_int_config(pchip); | |
240a5291 AL |
490 | if (ret < 0) { |
491 | dev_err(&client->dev, "fail to irq config\n"); | |
57135250 | 492 | goto err; |
240a5291 | 493 | } |
b59320cc DJ |
494 | |
495 | return ret; | |
496 | ||
57135250 | 497 | err: |
b59320cc | 498 | /* output disable */ |
1200c60b | 499 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) |
b59320cc DJ |
500 | lp8755_write(pchip, icnt, 0x00); |
501 | ||
b59320cc DJ |
502 | return ret; |
503 | } | |
504 | ||
505 | static int lp8755_remove(struct i2c_client *client) | |
506 | { | |
507 | int icnt; | |
508 | struct lp8755_chip *pchip = i2c_get_clientdata(client); | |
509 | ||
1200c60b | 510 | for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++) |
b59320cc DJ |
511 | lp8755_write(pchip, icnt, 0x00); |
512 | ||
b59320cc DJ |
513 | return 0; |
514 | } | |
515 | ||
516 | static const struct i2c_device_id lp8755_id[] = { | |
517 | {LP8755_NAME, 0}, | |
518 | {} | |
519 | }; | |
520 | ||
521 | MODULE_DEVICE_TABLE(i2c, lp8755_id); | |
522 | ||
523 | static struct i2c_driver lp8755_i2c_driver = { | |
524 | .driver = { | |
525 | .name = LP8755_NAME, | |
526 | }, | |
527 | .probe = lp8755_probe, | |
a1a41ab4 | 528 | .remove = lp8755_remove, |
b59320cc DJ |
529 | .id_table = lp8755_id, |
530 | }; | |
531 | ||
532 | static int __init lp8755_init(void) | |
533 | { | |
534 | return i2c_add_driver(&lp8755_i2c_driver); | |
535 | } | |
536 | ||
537 | subsys_initcall(lp8755_init); | |
538 | ||
539 | static void __exit lp8755_exit(void) | |
540 | { | |
541 | i2c_del_driver(&lp8755_i2c_driver); | |
542 | } | |
543 | ||
544 | module_exit(lp8755_exit); | |
545 | ||
546 | MODULE_DESCRIPTION("Texas Instruments lp8755 driver"); | |
547 | MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>"); | |
548 | MODULE_LICENSE("GPL v2"); |