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Linux 4.19.133
[linux/fpc-iii.git] / drivers / mfd / tps80031.c
blob608c7f77830eea1d79a85c5a6abd6ef85bb23987
1 /*
2 * tps80031.c -- TI TPS80031/TPS80032 mfd core driver.
3 *
4 * MFD core driver for TI TPS80031/TPS80032 Fully Integrated
5 * Power Management with Power Path and Battery Charger
6 *
7 * Copyright (c) 2012, NVIDIA Corporation.
8 *
9 * Author: Laxman Dewangan <ldewangan@nvidia.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation version 2.
14 *
15 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
16 * whether express or implied; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 * 02111-1307, USA
24 */
25
26 #include <linux/err.h>
27 #include <linux/i2c.h>
28 #include <linux/init.h>
29 #include <linux/interrupt.h>
30 #include <linux/irq.h>
31 #include <linux/mfd/core.h>
32 #include <linux/mfd/tps80031.h>
33 #include <linux/module.h>
34 #include <linux/pm.h>
35 #include <linux/regmap.h>
36 #include <linux/slab.h>
37
38 static struct resource tps80031_rtc_resources[] = {
39 {
40 .start = TPS80031_INT_RTC_ALARM,
41 .end = TPS80031_INT_RTC_ALARM,
42 .flags = IORESOURCE_IRQ,
43 },
44 };
45
46 /* TPS80031 sub mfd devices */
47 static const struct mfd_cell tps80031_cell[] = {
48 {
49 .name = "tps80031-pmic",
50 },
51 {
52 .name = "tps80031-clock",
53 },
54 {
55 .name = "tps80031-rtc",
56 .num_resources = ARRAY_SIZE(tps80031_rtc_resources),
57 .resources = tps80031_rtc_resources,
58 },
59 {
60 .name = "tps80031-gpadc",
61 },
62 {
63 .name = "tps80031-fuel-gauge",
64 },
65 {
66 .name = "tps80031-charger",
67 },
68 };
69
70 static int tps80031_slave_address[TPS80031_NUM_SLAVES] = {
71 TPS80031_I2C_ID0_ADDR,
72 TPS80031_I2C_ID1_ADDR,
73 TPS80031_I2C_ID2_ADDR,
74 TPS80031_I2C_ID3_ADDR,
75 };
76
77 struct tps80031_pupd_data {
78 u8 reg;
79 u8 pullup_bit;
80 u8 pulldown_bit;
81 };
82
83 #define TPS80031_IRQ(_reg, _mask) \
84 { \
85 .reg_offset = (TPS80031_INT_MSK_LINE_##_reg) - \
86 TPS80031_INT_MSK_LINE_A, \
87 .mask = BIT(_mask), \
88 }
89
90 static const struct regmap_irq tps80031_main_irqs[] = {
91 [TPS80031_INT_PWRON] = TPS80031_IRQ(A, 0),
92 [TPS80031_INT_RPWRON] = TPS80031_IRQ(A, 1),
93 [TPS80031_INT_SYS_VLOW] = TPS80031_IRQ(A, 2),
94 [TPS80031_INT_RTC_ALARM] = TPS80031_IRQ(A, 3),
95 [TPS80031_INT_RTC_PERIOD] = TPS80031_IRQ(A, 4),
96 [TPS80031_INT_HOT_DIE] = TPS80031_IRQ(A, 5),
97 [TPS80031_INT_VXX_SHORT] = TPS80031_IRQ(A, 6),
98 [TPS80031_INT_SPDURATION] = TPS80031_IRQ(A, 7),
99 [TPS80031_INT_WATCHDOG] = TPS80031_IRQ(B, 0),
100 [TPS80031_INT_BAT] = TPS80031_IRQ(B, 1),
101 [TPS80031_INT_SIM] = TPS80031_IRQ(B, 2),
102 [TPS80031_INT_MMC] = TPS80031_IRQ(B, 3),
103 [TPS80031_INT_RES] = TPS80031_IRQ(B, 4),
104 [TPS80031_INT_GPADC_RT] = TPS80031_IRQ(B, 5),
105 [TPS80031_INT_GPADC_SW2_EOC] = TPS80031_IRQ(B, 6),
106 [TPS80031_INT_CC_AUTOCAL] = TPS80031_IRQ(B, 7),
107 [TPS80031_INT_ID_WKUP] = TPS80031_IRQ(C, 0),
108 [TPS80031_INT_VBUSS_WKUP] = TPS80031_IRQ(C, 1),
109 [TPS80031_INT_ID] = TPS80031_IRQ(C, 2),
110 [TPS80031_INT_VBUS] = TPS80031_IRQ(C, 3),
111 [TPS80031_INT_CHRG_CTRL] = TPS80031_IRQ(C, 4),
112 [TPS80031_INT_EXT_CHRG] = TPS80031_IRQ(C, 5),
113 [TPS80031_INT_INT_CHRG] = TPS80031_IRQ(C, 6),
114 [TPS80031_INT_RES2] = TPS80031_IRQ(C, 7),
115 };
116
117 static struct regmap_irq_chip tps80031_irq_chip = {
118 .name = "tps80031",
119 .irqs = tps80031_main_irqs,
120 .num_irqs = ARRAY_SIZE(tps80031_main_irqs),
121 .num_regs = 3,
122 .status_base = TPS80031_INT_STS_A,
123 .mask_base = TPS80031_INT_MSK_LINE_A,
124 };
125
126 #define PUPD_DATA(_reg, _pulldown_bit, _pullup_bit) \
127 { \
128 .reg = TPS80031_CFG_INPUT_PUPD##_reg, \
129 .pulldown_bit = _pulldown_bit, \
130 .pullup_bit = _pullup_bit, \
131 }
132
133 static const struct tps80031_pupd_data tps80031_pupds[] = {
134 [TPS80031_PREQ1] = PUPD_DATA(1, BIT(0), BIT(1)),
135 [TPS80031_PREQ2A] = PUPD_DATA(1, BIT(2), BIT(3)),
136 [TPS80031_PREQ2B] = PUPD_DATA(1, BIT(4), BIT(5)),
137 [TPS80031_PREQ2C] = PUPD_DATA(1, BIT(6), BIT(7)),
138 [TPS80031_PREQ3] = PUPD_DATA(2, BIT(0), BIT(1)),
139 [TPS80031_NRES_WARM] = PUPD_DATA(2, 0, BIT(2)),
140 [TPS80031_PWM_FORCE] = PUPD_DATA(2, BIT(5), 0),
141 [TPS80031_CHRG_EXT_CHRG_STATZ] = PUPD_DATA(2, 0, BIT(6)),
142 [TPS80031_SIM] = PUPD_DATA(3, BIT(0), BIT(1)),
143 [TPS80031_MMC] = PUPD_DATA(3, BIT(2), BIT(3)),
144 [TPS80031_GPADC_START] = PUPD_DATA(3, BIT(4), 0),
145 [TPS80031_DVSI2C_SCL] = PUPD_DATA(4, 0, BIT(0)),
146 [TPS80031_DVSI2C_SDA] = PUPD_DATA(4, 0, BIT(1)),
147 [TPS80031_CTLI2C_SCL] = PUPD_DATA(4, 0, BIT(2)),
148 [TPS80031_CTLI2C_SDA] = PUPD_DATA(4, 0, BIT(3)),
149 };
150 static struct tps80031 *tps80031_power_off_dev;
151
152 int tps80031_ext_power_req_config(struct device *dev,
153 unsigned long ext_ctrl_flag, int preq_bit,
154 int state_reg_add, int trans_reg_add)
155 {
156 u8 res_ass_reg = 0;
157 int preq_mask_bit = 0;
158 int ret;
159
160 if (!(ext_ctrl_flag & TPS80031_EXT_PWR_REQ))
161 return 0;
162
163 if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ1) {
164 res_ass_reg = TPS80031_PREQ1_RES_ASS_A + (preq_bit >> 3);
165 preq_mask_bit = 5;
166 } else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ2) {
167 res_ass_reg = TPS80031_PREQ2_RES_ASS_A + (preq_bit >> 3);
168 preq_mask_bit = 6;
169 } else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ3) {
170 res_ass_reg = TPS80031_PREQ3_RES_ASS_A + (preq_bit >> 3);
171 preq_mask_bit = 7;
172 }
173
174 /* Configure REQ_ASS registers */
175 ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1, res_ass_reg,
176 BIT(preq_bit & 0x7));
177 if (ret < 0) {
178 dev_err(dev, "reg 0x%02x setbit failed, err = %d\n",
179 res_ass_reg, ret);
180 return ret;
181 }
182
183 /* Unmask the PREQ */
184 ret = tps80031_clr_bits(dev, TPS80031_SLAVE_ID1,
185 TPS80031_PHOENIX_MSK_TRANSITION, BIT(preq_mask_bit));
186 if (ret < 0) {
187 dev_err(dev, "reg 0x%02x clrbit failed, err = %d\n",
188 TPS80031_PHOENIX_MSK_TRANSITION, ret);
189 return ret;
190 }
191
192 /* Switch regulator control to resource now */
193 if (ext_ctrl_flag & (TPS80031_PWR_REQ_INPUT_PREQ2 |
194 TPS80031_PWR_REQ_INPUT_PREQ3)) {
195 ret = tps80031_update(dev, TPS80031_SLAVE_ID1, state_reg_add,
196 0x0, TPS80031_STATE_MASK);
197 if (ret < 0)
198 dev_err(dev, "reg 0x%02x update failed, err = %d\n",
199 state_reg_add, ret);
200 } else {
201 ret = tps80031_update(dev, TPS80031_SLAVE_ID1, trans_reg_add,
202 TPS80031_TRANS_SLEEP_OFF,
203 TPS80031_TRANS_SLEEP_MASK);
204 if (ret < 0)
205 dev_err(dev, "reg 0x%02x update failed, err = %d\n",
206 trans_reg_add, ret);
207 }
208 return ret;
209 }
210 EXPORT_SYMBOL_GPL(tps80031_ext_power_req_config);
211
212 static void tps80031_power_off(void)
213 {
214 dev_info(tps80031_power_off_dev->dev, "switching off PMU\n");
215 tps80031_write(tps80031_power_off_dev->dev, TPS80031_SLAVE_ID1,
216 TPS80031_PHOENIX_DEV_ON, TPS80031_DEVOFF);
217 }
218
219 static void tps80031_pupd_init(struct tps80031 *tps80031,
220 struct tps80031_platform_data *pdata)
221 {
222 struct tps80031_pupd_init_data *pupd_init_data = pdata->pupd_init_data;
223 int data_size = pdata->pupd_init_data_size;
224 int i;
225
226 for (i = 0; i < data_size; ++i) {
227 struct tps80031_pupd_init_data *pupd_init = &pupd_init_data[i];
228 const struct tps80031_pupd_data *pupd =
229 &tps80031_pupds[pupd_init->input_pin];
230 u8 update_value = 0;
231 u8 update_mask = pupd->pulldown_bit | pupd->pullup_bit;
232
233 if (pupd_init->setting == TPS80031_PUPD_PULLDOWN)
234 update_value = pupd->pulldown_bit;
235 else if (pupd_init->setting == TPS80031_PUPD_PULLUP)
236 update_value = pupd->pullup_bit;
237
238 tps80031_update(tps80031->dev, TPS80031_SLAVE_ID1, pupd->reg,
239 update_value, update_mask);
240 }
241 }
242
243 static int tps80031_init_ext_control(struct tps80031 *tps80031,
244 struct tps80031_platform_data *pdata)
245 {
246 struct device *dev = tps80031->dev;
247 int ret;
248 int i;
249
250 /* Clear all external control for this rail */
251 for (i = 0; i < 9; ++i) {
252 ret = tps80031_write(dev, TPS80031_SLAVE_ID1,
253 TPS80031_PREQ1_RES_ASS_A + i, 0);
254 if (ret < 0) {
255 dev_err(dev, "reg 0x%02x write failed, err = %d\n",
256 TPS80031_PREQ1_RES_ASS_A + i, ret);
257 return ret;
258 }
259 }
260
261 /* Mask the PREQ */
262 ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1,
263 TPS80031_PHOENIX_MSK_TRANSITION, 0x7 << 5);
264 if (ret < 0) {
265 dev_err(dev, "reg 0x%02x set_bits failed, err = %d\n",
266 TPS80031_PHOENIX_MSK_TRANSITION, ret);
267 return ret;
268 }
269 return ret;
270 }
271
272 static int tps80031_irq_init(struct tps80031 *tps80031, int irq, int irq_base)
273 {
274 struct device *dev = tps80031->dev;
275 int i, ret;
276
277 /*
278 * The MASK register used for updating status register when
279 * interrupt occurs and LINE register used to pass the status
280 * to actual interrupt line. As per datasheet:
281 * When INT_MSK_LINE [i] is set to 1, the associated interrupt
282 * number i is INT line masked, which means that no interrupt is
283 * generated on the INT line.
284 * When INT_MSK_LINE [i] is set to 0, the associated interrupt
285 * number i is line enabled: An interrupt is generated on the
286 * INT line.
287 * In any case, the INT_STS [i] status bit may or may not be updated,
288 * only linked to the INT_MSK_STS [i] configuration register bit.
289 *
290 * When INT_MSK_STS [i] is set to 1, the associated interrupt number
291 * i is status masked, which means that no interrupt is stored in
292 * the INT_STS[i] status bit. Note that no interrupt number i is
293 * generated on the INT line, even if the INT_MSK_LINE [i] register
294 * bit is set to 0.
295 * When INT_MSK_STS [i] is set to 0, the associated interrupt number i
296 * is status enabled: An interrupt status is updated in the INT_STS [i]
297 * register. The interrupt may or may not be generated on the INT line,
298 * depending on the INT_MSK_LINE [i] configuration register bit.
299 */
300 for (i = 0; i < 3; i++)
301 tps80031_write(dev, TPS80031_SLAVE_ID2,
302 TPS80031_INT_MSK_STS_A + i, 0x00);
303
304 ret = regmap_add_irq_chip(tps80031->regmap[TPS80031_SLAVE_ID2], irq,
305 IRQF_ONESHOT, irq_base,
306 &tps80031_irq_chip, &tps80031->irq_data);
307 if (ret < 0) {
308 dev_err(dev, "add irq failed, err = %d\n", ret);
309 return ret;
310 }
311 return ret;
312 }
313
314 static bool rd_wr_reg_id0(struct device *dev, unsigned int reg)
315 {
316 switch (reg) {
317 case TPS80031_SMPS1_CFG_FORCE ... TPS80031_SMPS2_CFG_VOLTAGE:
318 return true;
319 default:
320 return false;
321 }
322 }
323
324 static bool rd_wr_reg_id1(struct device *dev, unsigned int reg)
325 {
326 switch (reg) {
327 case TPS80031_SECONDS_REG ... TPS80031_RTC_RESET_STATUS_REG:
328 case TPS80031_VALIDITY0 ... TPS80031_VALIDITY7:
329 case TPS80031_PHOENIX_START_CONDITION ... TPS80031_KEY_PRESS_DUR_CFG:
330 case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
331 case TPS80031_BROADCAST_ADDR_ALL ... TPS80031_BROADCAST_ADDR_CLK_RST:
332 case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
333 case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
334 case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
335 case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
336 case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
337 case TPS80031_BACKUP_REG:
338 return true;
339 default:
340 return false;
341 }
342 }
343
344 static bool is_volatile_reg_id1(struct device *dev, unsigned int reg)
345 {
346 switch (reg) {
347 case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
348 case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
349 case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
350 case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
351 case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
352 case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
353 return true;
354 default:
355 return false;
356 }
357 }
358
359 static bool rd_wr_reg_id2(struct device *dev, unsigned int reg)
360 {
361 switch (reg) {
362 case TPS80031_USB_VENDOR_ID_LSB ... TPS80031_USB_OTG_REVISION:
363 case TPS80031_GPADC_CTRL ... TPS80031_CTRL_P1:
364 case TPS80031_RTCH0_LSB ... TPS80031_GPCH0_MSB:
365 case TPS80031_TOGGLE1 ... TPS80031_VIBMODE:
366 case TPS80031_PWM1ON ... TPS80031_PWM2OFF:
367 case TPS80031_FG_REG_00 ... TPS80031_FG_REG_11:
368 case TPS80031_INT_STS_A ... TPS80031_INT_MSK_STS_C:
369 case TPS80031_CONTROLLER_CTRL2 ... TPS80031_LED_PWM_CTRL2:
370 return true;
371 default:
372 return false;
373 }
374 }
375
376 static bool rd_wr_reg_id3(struct device *dev, unsigned int reg)
377 {
378 switch (reg) {
379 case TPS80031_GPADC_TRIM0 ... TPS80031_GPADC_TRIM18:
380 return true;
381 default:
382 return false;
383 }
384 }
385
386 static const struct regmap_config tps80031_regmap_configs[] = {
387 {
388 .reg_bits = 8,
389 .val_bits = 8,
390 .writeable_reg = rd_wr_reg_id0,
391 .readable_reg = rd_wr_reg_id0,
392 .max_register = TPS80031_MAX_REGISTER,
393 },
394 {
395 .reg_bits = 8,
396 .val_bits = 8,
397 .writeable_reg = rd_wr_reg_id1,
398 .readable_reg = rd_wr_reg_id1,
399 .volatile_reg = is_volatile_reg_id1,
400 .max_register = TPS80031_MAX_REGISTER,
401 },
402 {
403 .reg_bits = 8,
404 .val_bits = 8,
405 .writeable_reg = rd_wr_reg_id2,
406 .readable_reg = rd_wr_reg_id2,
407 .max_register = TPS80031_MAX_REGISTER,
408 },
409 {
410 .reg_bits = 8,
411 .val_bits = 8,
412 .writeable_reg = rd_wr_reg_id3,
413 .readable_reg = rd_wr_reg_id3,
414 .max_register = TPS80031_MAX_REGISTER,
415 },
416 };
417
418 static int tps80031_probe(struct i2c_client *client,
419 const struct i2c_device_id *id)
420 {
421 struct tps80031_platform_data *pdata = dev_get_platdata(&client->dev);
422 struct tps80031 *tps80031;
423 int ret;
424 uint8_t es_version;
425 uint8_t ep_ver;
426 int i;
427
428 if (!pdata) {
429 dev_err(&client->dev, "tps80031 requires platform data\n");
430 return -EINVAL;
431 }
432
433 tps80031 = devm_kzalloc(&client->dev, sizeof(*tps80031), GFP_KERNEL);
434 if (!tps80031)
435 return -ENOMEM;
436
437 for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
438 if (tps80031_slave_address[i] == client->addr)
439 tps80031->clients[i] = client;
440 else
441 tps80031->clients[i] = i2c_new_dummy(client->adapter,
442 tps80031_slave_address[i]);
443 if (!tps80031->clients[i]) {
444 dev_err(&client->dev, "can't attach client %d\n", i);
445 ret = -ENOMEM;
446 goto fail_client_reg;
447 }
448
449 i2c_set_clientdata(tps80031->clients[i], tps80031);
450 tps80031->regmap[i] = devm_regmap_init_i2c(tps80031->clients[i],
451 &tps80031_regmap_configs[i]);
452 if (IS_ERR(tps80031->regmap[i])) {
453 ret = PTR_ERR(tps80031->regmap[i]);
454 dev_err(&client->dev,
455 "regmap %d init failed, err %d\n", i, ret);
456 goto fail_client_reg;
457 }
458 }
459
460 ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
461 TPS80031_JTAGVERNUM, &es_version);
462 if (ret < 0) {
463 dev_err(&client->dev,
464 "Silicon version number read failed: %d\n", ret);
465 goto fail_client_reg;
466 }
467
468 ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
469 TPS80031_EPROM_REV, &ep_ver);
470 if (ret < 0) {
471 dev_err(&client->dev,
472 "Silicon eeprom version read failed: %d\n", ret);
473 goto fail_client_reg;
474 }
475
476 dev_info(&client->dev, "ES version 0x%02x and EPROM version 0x%02x\n",
477 es_version, ep_ver);
478 tps80031->es_version = es_version;
479 tps80031->dev = &client->dev;
480 i2c_set_clientdata(client, tps80031);
481 tps80031->chip_info = id->driver_data;
482
483 ret = tps80031_irq_init(tps80031, client->irq, pdata->irq_base);
484 if (ret) {
485 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
486 goto fail_client_reg;
487 }
488
489 tps80031_pupd_init(tps80031, pdata);
490
491 tps80031_init_ext_control(tps80031, pdata);
492
493 ret = mfd_add_devices(tps80031->dev, -1,
494 tps80031_cell, ARRAY_SIZE(tps80031_cell),
495 NULL, 0,
496 regmap_irq_get_domain(tps80031->irq_data));
497 if (ret < 0) {
498 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
499 goto fail_mfd_add;
500 }
501
502 if (pdata->use_power_off && !pm_power_off) {
503 tps80031_power_off_dev = tps80031;
504 pm_power_off = tps80031_power_off;
505 }
506 return 0;
507
508 fail_mfd_add:
509 regmap_del_irq_chip(client->irq, tps80031->irq_data);
510
511 fail_client_reg:
512 for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
513 if (tps80031->clients[i] && (tps80031->clients[i] != client))
514 i2c_unregister_device(tps80031->clients[i]);
515 }
516 return ret;
517 }
518
519 static int tps80031_remove(struct i2c_client *client)
520 {
521 struct tps80031 *tps80031 = i2c_get_clientdata(client);
522 int i;
523
524 if (tps80031_power_off_dev == tps80031) {
525 tps80031_power_off_dev = NULL;
526 pm_power_off = NULL;
527 }
528
529 mfd_remove_devices(tps80031->dev);
530
531 regmap_del_irq_chip(client->irq, tps80031->irq_data);
532
533 for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
534 if (tps80031->clients[i] != client)
535 i2c_unregister_device(tps80031->clients[i]);
536 }
537 return 0;
538 }
539
540 static const struct i2c_device_id tps80031_id_table[] = {
541 { "tps80031", TPS80031 },
542 { "tps80032", TPS80032 },
543 { }
544 };
545 MODULE_DEVICE_TABLE(i2c, tps80031_id_table);
546
547 static struct i2c_driver tps80031_driver = {
548 .driver = {
549 .name = "tps80031",
550 },
551 .probe = tps80031_probe,
552 .remove = tps80031_remove,
553 .id_table = tps80031_id_table,
554 };
555
556 static int __init tps80031_init(void)
557 {
558 return i2c_add_driver(&tps80031_driver);
559 }
560 subsys_initcall(tps80031_init);
561
562 static void __exit tps80031_exit(void)
563 {
564 i2c_del_driver(&tps80031_driver);
565 }
566 module_exit(tps80031_exit);
567
568 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
569 MODULE_DESCRIPTION("TPS80031 core driver");
570 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support