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Merge tag 'pstore-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees...
[deliverable/linux.git] / drivers / mfd / twl-core.c
1 /*
2 * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
3 * and audio CODEC devices
4 *
5 * Copyright (C) 2005-2006 Texas Instruments, Inc.
6 *
7 * Modifications to defer interrupt handling to a kernel thread:
8 * Copyright (C) 2006 MontaVista Software, Inc.
9 *
10 * Based on tlv320aic23.c:
11 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
12 *
13 * Code cleanup and modifications to IRQ handler.
14 * by syed khasim <x0khasim@ti.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31 #include <linux/init.h>
32 #include <linux/mutex.h>
33 #include <linux/module.h>
34 #include <linux/platform_device.h>
35 #include <linux/regmap.h>
36 #include <linux/clk.h>
37 #include <linux/err.h>
38 #include <linux/device.h>
39 #include <linux/of.h>
40 #include <linux/of_irq.h>
41 #include <linux/of_platform.h>
42 #include <linux/irq.h>
43 #include <linux/irqdomain.h>
44
45 #include <linux/regulator/machine.h>
46
47 #include <linux/i2c.h>
48 #include <linux/i2c/twl.h>
49
50 /* Register descriptions for audio */
51 #include <linux/mfd/twl4030-audio.h>
52
53 #include "twl-core.h"
54
55 /*
56 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
57 * Management and System Companion Device" chips originally designed for
58 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
59 * often at around 3 Mbit/sec, including for interrupt handling.
60 *
61 * This driver core provides genirq support for the interrupts emitted,
62 * by the various modules, and exports register access primitives.
63 *
64 * FIXME this driver currently requires use of the first interrupt line
65 * (and associated registers).
66 */
67
68 #define DRIVER_NAME "twl"
69
70 /* Triton Core internal information (BEGIN) */
71
72 /* Base Address defns for twl4030_map[] */
73
74 /* subchip/slave 0 - USB ID */
75 #define TWL4030_BASEADD_USB 0x0000
76
77 /* subchip/slave 1 - AUD ID */
78 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000
79 #define TWL4030_BASEADD_GPIO 0x0098
80 #define TWL4030_BASEADD_INTBR 0x0085
81 #define TWL4030_BASEADD_PIH 0x0080
82 #define TWL4030_BASEADD_TEST 0x004C
83
84 /* subchip/slave 2 - AUX ID */
85 #define TWL4030_BASEADD_INTERRUPTS 0x00B9
86 #define TWL4030_BASEADD_LED 0x00EE
87 #define TWL4030_BASEADD_MADC 0x0000
88 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074
89 #define TWL4030_BASEADD_PRECHARGE 0x00AA
90 #define TWL4030_BASEADD_PWM 0x00F8
91 #define TWL4030_BASEADD_KEYPAD 0x00D2
92
93 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
94 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
95 one */
96
97 /* subchip/slave 3 - POWER ID */
98 #define TWL4030_BASEADD_BACKUP 0x0014
99 #define TWL4030_BASEADD_INT 0x002E
100 #define TWL4030_BASEADD_PM_MASTER 0x0036
101
102 #define TWL4030_BASEADD_PM_RECEIVER 0x005B
103 #define TWL4030_DCDC_GLOBAL_CFG 0x06
104 #define SMARTREFLEX_ENABLE BIT(3)
105
106 #define TWL4030_BASEADD_RTC 0x001C
107 #define TWL4030_BASEADD_SECURED_REG 0x0000
108
109 /* Triton Core internal information (END) */
110
111
112 /* subchip/slave 0 0x48 - POWER */
113 #define TWL6030_BASEADD_RTC 0x0000
114 #define TWL6030_BASEADD_SECURED_REG 0x0017
115 #define TWL6030_BASEADD_PM_MASTER 0x001F
116 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
117 #define TWL6030_BASEADD_PM_MISC 0x00E2
118 #define TWL6030_BASEADD_PM_PUPD 0x00F0
119
120 /* subchip/slave 1 0x49 - FEATURE */
121 #define TWL6030_BASEADD_USB 0x0000
122 #define TWL6030_BASEADD_GPADC_CTRL 0x002E
123 #define TWL6030_BASEADD_AUX 0x0090
124 #define TWL6030_BASEADD_PWM 0x00BA
125 #define TWL6030_BASEADD_GASGAUGE 0x00C0
126 #define TWL6030_BASEADD_PIH 0x00D0
127 #define TWL6030_BASEADD_CHARGER 0x00E0
128 #define TWL6032_BASEADD_CHARGER 0x00DA
129 #define TWL6030_BASEADD_LED 0x00F4
130
131 /* subchip/slave 2 0x4A - DFT */
132 #define TWL6030_BASEADD_DIEID 0x00C0
133
134 /* subchip/slave 3 0x4B - AUDIO */
135 #define TWL6030_BASEADD_AUDIO 0x0000
136 #define TWL6030_BASEADD_RSV 0x0000
137 #define TWL6030_BASEADD_ZERO 0x0000
138
139 /* Few power values */
140 #define R_CFG_BOOT 0x05
141
142 /* some fields in R_CFG_BOOT */
143 #define HFCLK_FREQ_19p2_MHZ (1 << 0)
144 #define HFCLK_FREQ_26_MHZ (2 << 0)
145 #define HFCLK_FREQ_38p4_MHZ (3 << 0)
146 #define HIGH_PERF_SQ (1 << 3)
147 #define CK32K_LOWPWR_EN (1 << 7)
148
149 /*----------------------------------------------------------------------*/
150
151 /* Structure for each TWL4030/TWL6030 Slave */
152 struct twl_client {
153 struct i2c_client *client;
154 struct regmap *regmap;
155 };
156
157 /* mapping the module id to slave id and base address */
158 struct twl_mapping {
159 unsigned char sid; /* Slave ID */
160 unsigned char base; /* base address */
161 };
162
163 struct twl_private {
164 bool ready; /* The core driver is ready to be used */
165 u32 twl_idcode; /* TWL IDCODE Register value */
166 unsigned int twl_id;
167
168 struct twl_mapping *twl_map;
169 struct twl_client *twl_modules;
170 };
171
172 static struct twl_private *twl_priv;
173
174 static struct twl_mapping twl4030_map[] = {
175 /*
176 * NOTE: don't change this table without updating the
177 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
178 * so they continue to match the order in this table.
179 */
180
181 /* Common IPs */
182 { 0, TWL4030_BASEADD_USB },
183 { 1, TWL4030_BASEADD_PIH },
184 { 2, TWL4030_BASEADD_MAIN_CHARGE },
185 { 3, TWL4030_BASEADD_PM_MASTER },
186 { 3, TWL4030_BASEADD_PM_RECEIVER },
187
188 { 3, TWL4030_BASEADD_RTC },
189 { 2, TWL4030_BASEADD_PWM },
190 { 2, TWL4030_BASEADD_LED },
191 { 3, TWL4030_BASEADD_SECURED_REG },
192
193 /* TWL4030 specific IPs */
194 { 1, TWL4030_BASEADD_AUDIO_VOICE },
195 { 1, TWL4030_BASEADD_GPIO },
196 { 1, TWL4030_BASEADD_INTBR },
197 { 1, TWL4030_BASEADD_TEST },
198 { 2, TWL4030_BASEADD_KEYPAD },
199
200 { 2, TWL4030_BASEADD_MADC },
201 { 2, TWL4030_BASEADD_INTERRUPTS },
202 { 2, TWL4030_BASEADD_PRECHARGE },
203 { 3, TWL4030_BASEADD_BACKUP },
204 { 3, TWL4030_BASEADD_INT },
205
206 { 2, TWL5031_BASEADD_ACCESSORY },
207 { 2, TWL5031_BASEADD_INTERRUPTS },
208 };
209
210 static const struct reg_default twl4030_49_defaults[] = {
211 /* Audio Registers */
212 { 0x01, 0x00}, /* CODEC_MODE */
213 { 0x02, 0x00}, /* OPTION */
214 /* 0x03 Unused */
215 { 0x04, 0x00}, /* MICBIAS_CTL */
216 { 0x05, 0x00}, /* ANAMICL */
217 { 0x06, 0x00}, /* ANAMICR */
218 { 0x07, 0x00}, /* AVADC_CTL */
219 { 0x08, 0x00}, /* ADCMICSEL */
220 { 0x09, 0x00}, /* DIGMIXING */
221 { 0x0a, 0x0f}, /* ATXL1PGA */
222 { 0x0b, 0x0f}, /* ATXR1PGA */
223 { 0x0c, 0x0f}, /* AVTXL2PGA */
224 { 0x0d, 0x0f}, /* AVTXR2PGA */
225 { 0x0e, 0x00}, /* AUDIO_IF */
226 { 0x0f, 0x00}, /* VOICE_IF */
227 { 0x10, 0x3f}, /* ARXR1PGA */
228 { 0x11, 0x3f}, /* ARXL1PGA */
229 { 0x12, 0x3f}, /* ARXR2PGA */
230 { 0x13, 0x3f}, /* ARXL2PGA */
231 { 0x14, 0x25}, /* VRXPGA */
232 { 0x15, 0x00}, /* VSTPGA */
233 { 0x16, 0x00}, /* VRX2ARXPGA */
234 { 0x17, 0x00}, /* AVDAC_CTL */
235 { 0x18, 0x00}, /* ARX2VTXPGA */
236 { 0x19, 0x32}, /* ARXL1_APGA_CTL*/
237 { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
238 { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
239 { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
240 { 0x1d, 0x00}, /* ATX2ARXPGA */
241 { 0x1e, 0x00}, /* BT_IF */
242 { 0x1f, 0x55}, /* BTPGA */
243 { 0x20, 0x00}, /* BTSTPGA */
244 { 0x21, 0x00}, /* EAR_CTL */
245 { 0x22, 0x00}, /* HS_SEL */
246 { 0x23, 0x00}, /* HS_GAIN_SET */
247 { 0x24, 0x00}, /* HS_POPN_SET */
248 { 0x25, 0x00}, /* PREDL_CTL */
249 { 0x26, 0x00}, /* PREDR_CTL */
250 { 0x27, 0x00}, /* PRECKL_CTL */
251 { 0x28, 0x00}, /* PRECKR_CTL */
252 { 0x29, 0x00}, /* HFL_CTL */
253 { 0x2a, 0x00}, /* HFR_CTL */
254 { 0x2b, 0x05}, /* ALC_CTL */
255 { 0x2c, 0x00}, /* ALC_SET1 */
256 { 0x2d, 0x00}, /* ALC_SET2 */
257 { 0x2e, 0x00}, /* BOOST_CTL */
258 { 0x2f, 0x00}, /* SOFTVOL_CTL */
259 { 0x30, 0x13}, /* DTMF_FREQSEL */
260 { 0x31, 0x00}, /* DTMF_TONEXT1H */
261 { 0x32, 0x00}, /* DTMF_TONEXT1L */
262 { 0x33, 0x00}, /* DTMF_TONEXT2H */
263 { 0x34, 0x00}, /* DTMF_TONEXT2L */
264 { 0x35, 0x79}, /* DTMF_TONOFF */
265 { 0x36, 0x11}, /* DTMF_WANONOFF */
266 { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
267 { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
268 { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
269 { 0x3a, 0x06}, /* APLL_CTL */
270 { 0x3b, 0x00}, /* DTMF_CTL */
271 { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
272 { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
273 { 0x3e, 0x00}, /* MISC_SET_1 */
274 { 0x3f, 0x00}, /* PCMBTMUX */
275 /* 0x40 - 0x42 Unused */
276 { 0x43, 0x00}, /* RX_PATH_SEL */
277 { 0x44, 0x32}, /* VDL_APGA_CTL */
278 { 0x45, 0x00}, /* VIBRA_CTL */
279 { 0x46, 0x00}, /* VIBRA_SET */
280 { 0x47, 0x00}, /* VIBRA_PWM_SET */
281 { 0x48, 0x00}, /* ANAMIC_GAIN */
282 { 0x49, 0x00}, /* MISC_SET_2 */
283 /* End of Audio Registers */
284 };
285
286 static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
287 {
288 switch (reg) {
289 case 0x00:
290 case 0x03:
291 case 0x40:
292 case 0x41:
293 case 0x42:
294 return false;
295 default:
296 return true;
297 }
298 }
299
300 static const struct regmap_range twl4030_49_volatile_ranges[] = {
301 regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
302 };
303
304 static const struct regmap_access_table twl4030_49_volatile_table = {
305 .yes_ranges = twl4030_49_volatile_ranges,
306 .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
307 };
308
309 static const struct regmap_config twl4030_regmap_config[4] = {
310 {
311 /* Address 0x48 */
312 .reg_bits = 8,
313 .val_bits = 8,
314 .max_register = 0xff,
315 },
316 {
317 /* Address 0x49 */
318 .reg_bits = 8,
319 .val_bits = 8,
320 .max_register = 0xff,
321
322 .readable_reg = twl4030_49_nop_reg,
323 .writeable_reg = twl4030_49_nop_reg,
324
325 .volatile_table = &twl4030_49_volatile_table,
326
327 .reg_defaults = twl4030_49_defaults,
328 .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
329 .cache_type = REGCACHE_RBTREE,
330 },
331 {
332 /* Address 0x4a */
333 .reg_bits = 8,
334 .val_bits = 8,
335 .max_register = 0xff,
336 },
337 {
338 /* Address 0x4b */
339 .reg_bits = 8,
340 .val_bits = 8,
341 .max_register = 0xff,
342 },
343 };
344
345 static struct twl_mapping twl6030_map[] = {
346 /*
347 * NOTE: don't change this table without updating the
348 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
349 * so they continue to match the order in this table.
350 */
351
352 /* Common IPs */
353 { 1, TWL6030_BASEADD_USB },
354 { 1, TWL6030_BASEADD_PIH },
355 { 1, TWL6030_BASEADD_CHARGER },
356 { 0, TWL6030_BASEADD_PM_MASTER },
357 { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
358
359 { 0, TWL6030_BASEADD_RTC },
360 { 1, TWL6030_BASEADD_PWM },
361 { 1, TWL6030_BASEADD_LED },
362 { 0, TWL6030_BASEADD_SECURED_REG },
363
364 /* TWL6030 specific IPs */
365 { 0, TWL6030_BASEADD_ZERO },
366 { 1, TWL6030_BASEADD_ZERO },
367 { 2, TWL6030_BASEADD_ZERO },
368 { 1, TWL6030_BASEADD_GPADC_CTRL },
369 { 1, TWL6030_BASEADD_GASGAUGE },
370 };
371
372 static const struct regmap_config twl6030_regmap_config[3] = {
373 {
374 /* Address 0x48 */
375 .reg_bits = 8,
376 .val_bits = 8,
377 .max_register = 0xff,
378 },
379 {
380 /* Address 0x49 */
381 .reg_bits = 8,
382 .val_bits = 8,
383 .max_register = 0xff,
384 },
385 {
386 /* Address 0x4a */
387 .reg_bits = 8,
388 .val_bits = 8,
389 .max_register = 0xff,
390 },
391 };
392
393 /*----------------------------------------------------------------------*/
394
395 static inline int twl_get_num_slaves(void)
396 {
397 if (twl_class_is_4030())
398 return 4; /* TWL4030 class have four slave address */
399 else
400 return 3; /* TWL6030 class have three slave address */
401 }
402
403 static inline int twl_get_last_module(void)
404 {
405 if (twl_class_is_4030())
406 return TWL4030_MODULE_LAST;
407 else
408 return TWL6030_MODULE_LAST;
409 }
410
411 /* Exported Functions */
412
413 unsigned int twl_rev(void)
414 {
415 return twl_priv ? twl_priv->twl_id : 0;
416 }
417 EXPORT_SYMBOL(twl_rev);
418
419 /**
420 * twl_get_regmap - Get the regmap associated with the given module
421 * @mod_no: module number
422 *
423 * Returns the regmap pointer or NULL in case of failure.
424 */
425 static struct regmap *twl_get_regmap(u8 mod_no)
426 {
427 int sid;
428 struct twl_client *twl;
429
430 if (unlikely(!twl_priv || !twl_priv->ready)) {
431 pr_err("%s: not initialized\n", DRIVER_NAME);
432 return NULL;
433 }
434 if (unlikely(mod_no >= twl_get_last_module())) {
435 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
436 return NULL;
437 }
438
439 sid = twl_priv->twl_map[mod_no].sid;
440 twl = &twl_priv->twl_modules[sid];
441
442 return twl->regmap;
443 }
444
445 /**
446 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
447 * @mod_no: module number
448 * @value: an array of num_bytes+1 containing data to write
449 * @reg: register address (just offset will do)
450 * @num_bytes: number of bytes to transfer
451 *
452 * Returns the result of operation - 0 is success
453 */
454 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
455 {
456 struct regmap *regmap = twl_get_regmap(mod_no);
457 int ret;
458
459 if (!regmap)
460 return -EPERM;
461
462 ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
463 value, num_bytes);
464
465 if (ret)
466 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
467 DRIVER_NAME, mod_no, reg, num_bytes);
468
469 return ret;
470 }
471 EXPORT_SYMBOL(twl_i2c_write);
472
473 /**
474 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
475 * @mod_no: module number
476 * @value: an array of num_bytes containing data to be read
477 * @reg: register address (just offset will do)
478 * @num_bytes: number of bytes to transfer
479 *
480 * Returns result of operation - num_bytes is success else failure.
481 */
482 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
483 {
484 struct regmap *regmap = twl_get_regmap(mod_no);
485 int ret;
486
487 if (!regmap)
488 return -EPERM;
489
490 ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
491 value, num_bytes);
492
493 if (ret)
494 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
495 DRIVER_NAME, mod_no, reg, num_bytes);
496
497 return ret;
498 }
499 EXPORT_SYMBOL(twl_i2c_read);
500
501 /**
502 * twl_regcache_bypass - Configure the regcache bypass for the regmap associated
503 * with the module
504 * @mod_no: module number
505 * @enable: Regcache bypass state
506 *
507 * Returns 0 else failure.
508 */
509 int twl_set_regcache_bypass(u8 mod_no, bool enable)
510 {
511 struct regmap *regmap = twl_get_regmap(mod_no);
512
513 if (!regmap)
514 return -EPERM;
515
516 regcache_cache_bypass(regmap, enable);
517
518 return 0;
519 }
520 EXPORT_SYMBOL(twl_set_regcache_bypass);
521
522 /*----------------------------------------------------------------------*/
523
524 /**
525 * twl_read_idcode_register - API to read the IDCODE register.
526 *
527 * Unlocks the IDCODE register and read the 32 bit value.
528 */
529 static int twl_read_idcode_register(void)
530 {
531 int err;
532
533 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
534 REG_UNLOCK_TEST_REG);
535 if (err) {
536 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
537 goto fail;
538 }
539
540 err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
541 REG_IDCODE_7_0, 4);
542 if (err) {
543 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
544 goto fail;
545 }
546
547 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
548 if (err)
549 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
550 fail:
551 return err;
552 }
553
554 /**
555 * twl_get_type - API to get TWL Si type.
556 *
557 * Api to get the TWL Si type from IDCODE value.
558 */
559 int twl_get_type(void)
560 {
561 return TWL_SIL_TYPE(twl_priv->twl_idcode);
562 }
563 EXPORT_SYMBOL_GPL(twl_get_type);
564
565 /**
566 * twl_get_version - API to get TWL Si version.
567 *
568 * Api to get the TWL Si version from IDCODE value.
569 */
570 int twl_get_version(void)
571 {
572 return TWL_SIL_REV(twl_priv->twl_idcode);
573 }
574 EXPORT_SYMBOL_GPL(twl_get_version);
575
576 /**
577 * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
578 *
579 * Api to get the TWL HFCLK rate based on BOOT_CFG register.
580 */
581 int twl_get_hfclk_rate(void)
582 {
583 u8 ctrl;
584 int rate;
585
586 twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
587
588 switch (ctrl & 0x3) {
589 case HFCLK_FREQ_19p2_MHZ:
590 rate = 19200000;
591 break;
592 case HFCLK_FREQ_26_MHZ:
593 rate = 26000000;
594 break;
595 case HFCLK_FREQ_38p4_MHZ:
596 rate = 38400000;
597 break;
598 default:
599 pr_err("TWL4030: HFCLK is not configured\n");
600 rate = -EINVAL;
601 break;
602 }
603
604 return rate;
605 }
606 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
607
608 static struct device *
609 add_numbered_child(unsigned mod_no, const char *name, int num,
610 void *pdata, unsigned pdata_len,
611 bool can_wakeup, int irq0, int irq1)
612 {
613 struct platform_device *pdev;
614 struct twl_client *twl;
615 int status, sid;
616
617 if (unlikely(mod_no >= twl_get_last_module())) {
618 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
619 return ERR_PTR(-EPERM);
620 }
621 sid = twl_priv->twl_map[mod_no].sid;
622 twl = &twl_priv->twl_modules[sid];
623
624 pdev = platform_device_alloc(name, num);
625 if (!pdev)
626 return ERR_PTR(-ENOMEM);
627
628 pdev->dev.parent = &twl->client->dev;
629
630 if (pdata) {
631 status = platform_device_add_data(pdev, pdata, pdata_len);
632 if (status < 0) {
633 dev_dbg(&pdev->dev, "can't add platform_data\n");
634 goto put_device;
635 }
636 }
637
638 if (irq0) {
639 struct resource r[2] = {
640 { .start = irq0, .flags = IORESOURCE_IRQ, },
641 { .start = irq1, .flags = IORESOURCE_IRQ, },
642 };
643
644 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
645 if (status < 0) {
646 dev_dbg(&pdev->dev, "can't add irqs\n");
647 goto put_device;
648 }
649 }
650
651 status = platform_device_add(pdev);
652 if (status)
653 goto put_device;
654
655 device_init_wakeup(&pdev->dev, can_wakeup);
656
657 return &pdev->dev;
658
659 put_device:
660 platform_device_put(pdev);
661 dev_err(&twl->client->dev, "failed to add device %s\n", name);
662 return ERR_PTR(status);
663 }
664
665 static inline struct device *add_child(unsigned mod_no, const char *name,
666 void *pdata, unsigned pdata_len,
667 bool can_wakeup, int irq0, int irq1)
668 {
669 return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
670 can_wakeup, irq0, irq1);
671 }
672
673 static struct device *
674 add_regulator_linked(int num, struct regulator_init_data *pdata,
675 struct regulator_consumer_supply *consumers,
676 unsigned num_consumers, unsigned long features)
677 {
678 struct twl_regulator_driver_data drv_data;
679
680 /* regulator framework demands init_data ... */
681 if (!pdata)
682 return NULL;
683
684 if (consumers) {
685 pdata->consumer_supplies = consumers;
686 pdata->num_consumer_supplies = num_consumers;
687 }
688
689 if (pdata->driver_data) {
690 /* If we have existing drv_data, just add the flags */
691 struct twl_regulator_driver_data *tmp;
692 tmp = pdata->driver_data;
693 tmp->features |= features;
694 } else {
695 /* add new driver data struct, used only during init */
696 drv_data.features = features;
697 drv_data.set_voltage = NULL;
698 drv_data.get_voltage = NULL;
699 drv_data.data = NULL;
700 pdata->driver_data = &drv_data;
701 }
702
703 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
704 return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
705 pdata, sizeof(*pdata), false, 0, 0);
706 }
707
708 static struct device *
709 add_regulator(int num, struct regulator_init_data *pdata,
710 unsigned long features)
711 {
712 return add_regulator_linked(num, pdata, NULL, 0, features);
713 }
714
715 /*
716 * NOTE: We know the first 8 IRQs after pdata->base_irq are
717 * for the PIH, and the next are for the PWR_INT SIH, since
718 * that's how twl_init_irq() sets things up.
719 */
720
721 static int
722 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
723 unsigned long features)
724 {
725 struct device *child;
726
727 if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
728 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
729 pdata->gpio, sizeof(*pdata->gpio),
730 false, irq_base + GPIO_INTR_OFFSET, 0);
731 if (IS_ERR(child))
732 return PTR_ERR(child);
733 }
734
735 if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
736 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
737 pdata->keypad, sizeof(*pdata->keypad),
738 true, irq_base + KEYPAD_INTR_OFFSET, 0);
739 if (IS_ERR(child))
740 return PTR_ERR(child);
741 }
742
743 if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
744 twl_class_is_4030()) {
745 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
746 pdata->madc, sizeof(*pdata->madc),
747 true, irq_base + MADC_INTR_OFFSET, 0);
748 if (IS_ERR(child))
749 return PTR_ERR(child);
750 }
751
752 if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
753 /*
754 * REVISIT platform_data here currently might expose the
755 * "msecure" line ... but for now we just expect board
756 * setup to tell the chip "it's always ok to SET_TIME".
757 * Eventually, Linux might become more aware of such
758 * HW security concerns, and "least privilege".
759 */
760 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
761 true, irq_base + RTC_INTR_OFFSET, 0);
762 if (IS_ERR(child))
763 return PTR_ERR(child);
764 }
765
766 if (IS_ENABLED(CONFIG_PWM_TWL)) {
767 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
768 false, 0, 0);
769 if (IS_ERR(child))
770 return PTR_ERR(child);
771 }
772
773 if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
774 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
775 false, 0, 0);
776 if (IS_ERR(child))
777 return PTR_ERR(child);
778 }
779
780 if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
781 twl_class_is_4030()) {
782
783 static struct regulator_consumer_supply usb1v5 = {
784 .supply = "usb1v5",
785 };
786 static struct regulator_consumer_supply usb1v8 = {
787 .supply = "usb1v8",
788 };
789 static struct regulator_consumer_supply usb3v1 = {
790 .supply = "usb3v1",
791 };
792
793 /* First add the regulators so that they can be used by transceiver */
794 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
795 /* this is a template that gets copied */
796 struct regulator_init_data usb_fixed = {
797 .constraints.valid_modes_mask =
798 REGULATOR_MODE_NORMAL
799 | REGULATOR_MODE_STANDBY,
800 .constraints.valid_ops_mask =
801 REGULATOR_CHANGE_MODE
802 | REGULATOR_CHANGE_STATUS,
803 };
804
805 child = add_regulator_linked(TWL4030_REG_VUSB1V5,
806 &usb_fixed, &usb1v5, 1,
807 features);
808 if (IS_ERR(child))
809 return PTR_ERR(child);
810
811 child = add_regulator_linked(TWL4030_REG_VUSB1V8,
812 &usb_fixed, &usb1v8, 1,
813 features);
814 if (IS_ERR(child))
815 return PTR_ERR(child);
816
817 child = add_regulator_linked(TWL4030_REG_VUSB3V1,
818 &usb_fixed, &usb3v1, 1,
819 features);
820 if (IS_ERR(child))
821 return PTR_ERR(child);
822
823 }
824
825 child = add_child(TWL_MODULE_USB, "twl4030_usb",
826 pdata->usb, sizeof(*pdata->usb), true,
827 /* irq0 = USB_PRES, irq1 = USB */
828 irq_base + USB_PRES_INTR_OFFSET,
829 irq_base + USB_INTR_OFFSET);
830
831 if (IS_ERR(child))
832 return PTR_ERR(child);
833
834 /* we need to connect regulators to this transceiver */
835 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
836 usb1v5.dev_name = dev_name(child);
837 usb1v8.dev_name = dev_name(child);
838 usb3v1.dev_name = dev_name(child);
839 }
840 }
841
842 if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
843 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
844 0, false, 0, 0);
845 if (IS_ERR(child))
846 return PTR_ERR(child);
847 }
848
849 if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
850 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
851 NULL, 0, true, irq_base + 8 + 0, 0);
852 if (IS_ERR(child))
853 return PTR_ERR(child);
854 }
855
856 if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
857 twl_class_is_4030()) {
858 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
859 pdata->audio, sizeof(*pdata->audio),
860 false, 0, 0);
861 if (IS_ERR(child))
862 return PTR_ERR(child);
863 }
864
865 /* twl4030 regulators */
866 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
867 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
868 features);
869 if (IS_ERR(child))
870 return PTR_ERR(child);
871
872 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
873 features);
874 if (IS_ERR(child))
875 return PTR_ERR(child);
876
877 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
878 features);
879 if (IS_ERR(child))
880 return PTR_ERR(child);
881
882 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
883 features);
884 if (IS_ERR(child))
885 return PTR_ERR(child);
886
887 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
888 features);
889 if (IS_ERR(child))
890 return PTR_ERR(child);
891
892 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
893 features);
894 if (IS_ERR(child))
895 return PTR_ERR(child);
896
897 child = add_regulator((features & TWL4030_VAUX2)
898 ? TWL4030_REG_VAUX2_4030
899 : TWL4030_REG_VAUX2,
900 pdata->vaux2, features);
901 if (IS_ERR(child))
902 return PTR_ERR(child);
903
904 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
905 features);
906 if (IS_ERR(child))
907 return PTR_ERR(child);
908
909 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
910 features);
911 if (IS_ERR(child))
912 return PTR_ERR(child);
913
914 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
915 features);
916 if (IS_ERR(child))
917 return PTR_ERR(child);
918 }
919
920 /* maybe add LDOs that are omitted on cost-reduced parts */
921 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
922 && twl_class_is_4030()) {
923 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
924 features);
925 if (IS_ERR(child))
926 return PTR_ERR(child);
927
928 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
929 features);
930 if (IS_ERR(child))
931 return PTR_ERR(child);
932
933 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
934 features);
935 if (IS_ERR(child))
936 return PTR_ERR(child);
937
938 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
939 features);
940 if (IS_ERR(child))
941 return PTR_ERR(child);
942
943 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
944 features);
945 if (IS_ERR(child))
946 return PTR_ERR(child);
947
948 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
949 features);
950 if (IS_ERR(child))
951 return PTR_ERR(child);
952 }
953
954 if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
955 !(features & (TPS_SUBSET | TWL5031))) {
956 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
957 pdata->bci, sizeof(*pdata->bci), false,
958 /* irq0 = CHG_PRES, irq1 = BCI */
959 irq_base + BCI_PRES_INTR_OFFSET,
960 irq_base + BCI_INTR_OFFSET);
961 if (IS_ERR(child))
962 return PTR_ERR(child);
963 }
964
965 if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) {
966 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power",
967 pdata->power, sizeof(*pdata->power), false,
968 0, 0);
969 if (IS_ERR(child))
970 return PTR_ERR(child);
971 }
972
973 return 0;
974 }
975
976 /*----------------------------------------------------------------------*/
977
978 /*
979 * These three functions initialize the on-chip clock framework,
980 * letting it generate the right frequencies for USB, MADC, and
981 * other purposes.
982 */
983 static inline int __init protect_pm_master(void)
984 {
985 int e = 0;
986
987 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
988 TWL4030_PM_MASTER_PROTECT_KEY);
989 return e;
990 }
991
992 static inline int __init unprotect_pm_master(void)
993 {
994 int e = 0;
995
996 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
997 TWL4030_PM_MASTER_PROTECT_KEY);
998 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
999 TWL4030_PM_MASTER_PROTECT_KEY);
1000
1001 return e;
1002 }
1003
1004 static void clocks_init(struct device *dev,
1005 struct twl4030_clock_init_data *clock)
1006 {
1007 int e = 0;
1008 struct clk *osc;
1009 u32 rate;
1010 u8 ctrl = HFCLK_FREQ_26_MHZ;
1011
1012 osc = clk_get(dev, "fck");
1013 if (IS_ERR(osc)) {
1014 printk(KERN_WARNING "Skipping twl internal clock init and "
1015 "using bootloader value (unknown osc rate)\n");
1016 return;
1017 }
1018
1019 rate = clk_get_rate(osc);
1020 clk_put(osc);
1021
1022 switch (rate) {
1023 case 19200000:
1024 ctrl = HFCLK_FREQ_19p2_MHZ;
1025 break;
1026 case 26000000:
1027 ctrl = HFCLK_FREQ_26_MHZ;
1028 break;
1029 case 38400000:
1030 ctrl = HFCLK_FREQ_38p4_MHZ;
1031 break;
1032 }
1033
1034 ctrl |= HIGH_PERF_SQ;
1035 if (clock && clock->ck32k_lowpwr_enable)
1036 ctrl |= CK32K_LOWPWR_EN;
1037
1038 e |= unprotect_pm_master();
1039 /* effect->MADC+USB ck en */
1040 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1041 e |= protect_pm_master();
1042
1043 if (e < 0)
1044 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1045 }
1046
1047 /*----------------------------------------------------------------------*/
1048
1049
1050 static int twl_remove(struct i2c_client *client)
1051 {
1052 unsigned i, num_slaves;
1053 int status;
1054
1055 if (twl_class_is_4030())
1056 status = twl4030_exit_irq();
1057 else
1058 status = twl6030_exit_irq();
1059
1060 if (status < 0)
1061 return status;
1062
1063 num_slaves = twl_get_num_slaves();
1064 for (i = 0; i < num_slaves; i++) {
1065 struct twl_client *twl = &twl_priv->twl_modules[i];
1066
1067 if (twl->client && twl->client != client)
1068 i2c_unregister_device(twl->client);
1069 twl->client = NULL;
1070 }
1071 twl_priv->ready = false;
1072 return 0;
1073 }
1074
1075 static struct of_dev_auxdata twl_auxdata_lookup[] = {
1076 OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
1077 { /* sentinel */ },
1078 };
1079
1080 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1081 static int
1082 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1083 {
1084 struct twl4030_platform_data *pdata = dev_get_platdata(&client->dev);
1085 struct device_node *node = client->dev.of_node;
1086 struct platform_device *pdev;
1087 const struct regmap_config *twl_regmap_config;
1088 int irq_base = 0;
1089 int status;
1090 unsigned i, num_slaves;
1091
1092 if (!node && !pdata) {
1093 dev_err(&client->dev, "no platform data\n");
1094 return -EINVAL;
1095 }
1096
1097 if (twl_priv) {
1098 dev_dbg(&client->dev, "only one instance of %s allowed\n",
1099 DRIVER_NAME);
1100 return -EBUSY;
1101 }
1102
1103 pdev = platform_device_alloc(DRIVER_NAME, -1);
1104 if (!pdev) {
1105 dev_err(&client->dev, "can't alloc pdev\n");
1106 return -ENOMEM;
1107 }
1108
1109 status = platform_device_add(pdev);
1110 if (status) {
1111 platform_device_put(pdev);
1112 return status;
1113 }
1114
1115 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1116 dev_dbg(&client->dev, "can't talk I2C?\n");
1117 status = -EIO;
1118 goto free;
1119 }
1120
1121 twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
1122 GFP_KERNEL);
1123 if (!twl_priv) {
1124 status = -ENOMEM;
1125 goto free;
1126 }
1127
1128 if ((id->driver_data) & TWL6030_CLASS) {
1129 twl_priv->twl_id = TWL6030_CLASS_ID;
1130 twl_priv->twl_map = &twl6030_map[0];
1131 /* The charger base address is different in twl6032 */
1132 if ((id->driver_data) & TWL6032_SUBCLASS)
1133 twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base =
1134 TWL6032_BASEADD_CHARGER;
1135 twl_regmap_config = twl6030_regmap_config;
1136 } else {
1137 twl_priv->twl_id = TWL4030_CLASS_ID;
1138 twl_priv->twl_map = &twl4030_map[0];
1139 twl_regmap_config = twl4030_regmap_config;
1140 }
1141
1142 num_slaves = twl_get_num_slaves();
1143 twl_priv->twl_modules = devm_kzalloc(&client->dev,
1144 sizeof(struct twl_client) * num_slaves,
1145 GFP_KERNEL);
1146 if (!twl_priv->twl_modules) {
1147 status = -ENOMEM;
1148 goto free;
1149 }
1150
1151 for (i = 0; i < num_slaves; i++) {
1152 struct twl_client *twl = &twl_priv->twl_modules[i];
1153
1154 if (i == 0) {
1155 twl->client = client;
1156 } else {
1157 twl->client = i2c_new_dummy(client->adapter,
1158 client->addr + i);
1159 if (!twl->client) {
1160 dev_err(&client->dev,
1161 "can't attach client %d\n", i);
1162 status = -ENOMEM;
1163 goto fail;
1164 }
1165 }
1166
1167 twl->regmap = devm_regmap_init_i2c(twl->client,
1168 &twl_regmap_config[i]);
1169 if (IS_ERR(twl->regmap)) {
1170 status = PTR_ERR(twl->regmap);
1171 dev_err(&client->dev,
1172 "Failed to allocate regmap %d, err: %d\n", i,
1173 status);
1174 goto fail;
1175 }
1176 }
1177
1178 twl_priv->ready = true;
1179
1180 /* setup clock framework */
1181 clocks_init(&pdev->dev, pdata ? pdata->clock : NULL);
1182
1183 /* read TWL IDCODE Register */
1184 if (twl_class_is_4030()) {
1185 status = twl_read_idcode_register();
1186 WARN(status < 0, "Error: reading twl_idcode register value\n");
1187 }
1188
1189 /* Maybe init the T2 Interrupt subsystem */
1190 if (client->irq) {
1191 if (twl_class_is_4030()) {
1192 twl4030_init_chip_irq(id->name);
1193 irq_base = twl4030_init_irq(&client->dev, client->irq);
1194 } else {
1195 irq_base = twl6030_init_irq(&client->dev, client->irq);
1196 }
1197
1198 if (irq_base < 0) {
1199 status = irq_base;
1200 goto fail;
1201 }
1202 }
1203
1204 /*
1205 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1206 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1207 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1208 *
1209 * Also, always enable SmartReflex bit as that's needed for omaps to
1210 * to do anything over I2C4 for voltage scaling even if SmartReflex
1211 * is disabled. Without the SmartReflex bit omap sys_clkreq idle
1212 * signal will never trigger for retention idle.
1213 */
1214 if (twl_class_is_4030()) {
1215 u8 temp;
1216
1217 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1218 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1219 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1220 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1221
1222 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
1223 TWL4030_DCDC_GLOBAL_CFG);
1224 temp |= SMARTREFLEX_ENABLE;
1225 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
1226 TWL4030_DCDC_GLOBAL_CFG);
1227 }
1228
1229 if (node) {
1230 if (pdata)
1231 twl_auxdata_lookup[0].platform_data = pdata->gpio;
1232 status = of_platform_populate(node, NULL, twl_auxdata_lookup,
1233 &client->dev);
1234 } else {
1235 status = add_children(pdata, irq_base, id->driver_data);
1236 }
1237
1238 fail:
1239 if (status < 0)
1240 twl_remove(client);
1241 free:
1242 if (status < 0)
1243 platform_device_unregister(pdev);
1244
1245 return status;
1246 }
1247
1248 static const struct i2c_device_id twl_ids[] = {
1249 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
1250 { "twl5030", 0 }, /* T2 updated */
1251 { "twl5031", TWL5031 }, /* TWL5030 updated */
1252 { "tps65950", 0 }, /* catalog version of twl5030 */
1253 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
1254 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
1255 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED
1256 and vibrator. Charger in USB module*/
1257 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
1258 { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
1259 { /* end of list */ },
1260 };
1261 MODULE_DEVICE_TABLE(i2c, twl_ids);
1262
1263 /* One Client Driver , 4 Clients */
1264 static struct i2c_driver twl_driver = {
1265 .driver.name = DRIVER_NAME,
1266 .id_table = twl_ids,
1267 .probe = twl_probe,
1268 .remove = twl_remove,
1269 };
1270
1271 module_i2c_driver(twl_driver);
1272
1273 MODULE_AUTHOR("Texas Instruments, Inc.");
1274 MODULE_DESCRIPTION("I2C Core interface for TWL");
1275 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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