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mfd: twl-core: Move 'inuse' check early at probe time
[GitHub/mt8127/android_kernel_alcatel_ttab.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 #include "twl-core.h"
51
52 /*
53 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
54 * Management and System Companion Device" chips originally designed for
55 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
56 * often at around 3 Mbit/sec, including for interrupt handling.
57 *
58 * This driver core provides genirq support for the interrupts emitted,
59 * by the various modules, and exports register access primitives.
60 *
61 * FIXME this driver currently requires use of the first interrupt line
62 * (and associated registers).
63 */
64
65 #define DRIVER_NAME "twl"
66
67 /* Triton Core internal information (BEGIN) */
68
69 /* Base Address defns for twl4030_map[] */
70
71 /* subchip/slave 0 - USB ID */
72 #define TWL4030_BASEADD_USB 0x0000
73
74 /* subchip/slave 1 - AUD ID */
75 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000
76 #define TWL4030_BASEADD_GPIO 0x0098
77 #define TWL4030_BASEADD_INTBR 0x0085
78 #define TWL4030_BASEADD_PIH 0x0080
79 #define TWL4030_BASEADD_TEST 0x004C
80
81 /* subchip/slave 2 - AUX ID */
82 #define TWL4030_BASEADD_INTERRUPTS 0x00B9
83 #define TWL4030_BASEADD_LED 0x00EE
84 #define TWL4030_BASEADD_MADC 0x0000
85 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074
86 #define TWL4030_BASEADD_PRECHARGE 0x00AA
87 #define TWL4030_BASEADD_PWM 0x00F8
88 #define TWL4030_BASEADD_KEYPAD 0x00D2
89
90 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
91 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
92 one */
93
94 /* subchip/slave 3 - POWER ID */
95 #define TWL4030_BASEADD_BACKUP 0x0014
96 #define TWL4030_BASEADD_INT 0x002E
97 #define TWL4030_BASEADD_PM_MASTER 0x0036
98 #define TWL4030_BASEADD_PM_RECEIVER 0x005B
99 #define TWL4030_BASEADD_RTC 0x001C
100 #define TWL4030_BASEADD_SECURED_REG 0x0000
101
102 /* Triton Core internal information (END) */
103
104
105 /* subchip/slave 0 0x48 - POWER */
106 #define TWL6030_BASEADD_RTC 0x0000
107 #define TWL6030_BASEADD_SECURED_REG 0x0017
108 #define TWL6030_BASEADD_PM_MASTER 0x001F
109 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
110 #define TWL6030_BASEADD_PM_MISC 0x00E2
111 #define TWL6030_BASEADD_PM_PUPD 0x00F0
112
113 /* subchip/slave 1 0x49 - FEATURE */
114 #define TWL6030_BASEADD_USB 0x0000
115 #define TWL6030_BASEADD_GPADC_CTRL 0x002E
116 #define TWL6030_BASEADD_AUX 0x0090
117 #define TWL6030_BASEADD_PWM 0x00BA
118 #define TWL6030_BASEADD_GASGAUGE 0x00C0
119 #define TWL6030_BASEADD_PIH 0x00D0
120 #define TWL6030_BASEADD_CHARGER 0x00E0
121 #define TWL6025_BASEADD_CHARGER 0x00DA
122 #define TWL6030_BASEADD_LED 0x00F4
123
124 /* subchip/slave 2 0x4A - DFT */
125 #define TWL6030_BASEADD_DIEID 0x00C0
126
127 /* subchip/slave 3 0x4B - AUDIO */
128 #define TWL6030_BASEADD_AUDIO 0x0000
129 #define TWL6030_BASEADD_RSV 0x0000
130 #define TWL6030_BASEADD_ZERO 0x0000
131
132 /* Few power values */
133 #define R_CFG_BOOT 0x05
134
135 /* some fields in R_CFG_BOOT */
136 #define HFCLK_FREQ_19p2_MHZ (1 << 0)
137 #define HFCLK_FREQ_26_MHZ (2 << 0)
138 #define HFCLK_FREQ_38p4_MHZ (3 << 0)
139 #define HIGH_PERF_SQ (1 << 3)
140 #define CK32K_LOWPWR_EN (1 << 7)
141
142 /*----------------------------------------------------------------------*/
143
144 /* is driver active, bound to a chip? */
145 static bool inuse;
146
147 /* TWL IDCODE Register value */
148 static u32 twl_idcode;
149
150 static unsigned int twl_id;
151 unsigned int twl_rev(void)
152 {
153 return twl_id;
154 }
155 EXPORT_SYMBOL(twl_rev);
156
157 /* Structure for each TWL4030/TWL6030 Slave */
158 struct twl_client {
159 struct i2c_client *client;
160 struct regmap *regmap;
161 };
162
163 static struct twl_client *twl_modules;
164
165 /* mapping the module id to slave id and base address */
166 struct twl_mapping {
167 unsigned char sid; /* Slave ID */
168 unsigned char base; /* base address */
169 };
170 static struct twl_mapping *twl_map;
171
172 static struct twl_mapping twl4030_map[] = {
173 /*
174 * NOTE: don't change this table without updating the
175 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
176 * so they continue to match the order in this table.
177 */
178
179 /* Common IPs */
180 { 0, TWL4030_BASEADD_USB },
181 { 1, TWL4030_BASEADD_PIH },
182 { 2, TWL4030_BASEADD_MAIN_CHARGE },
183 { 3, TWL4030_BASEADD_PM_MASTER },
184 { 3, TWL4030_BASEADD_PM_RECEIVER },
185
186 { 3, TWL4030_BASEADD_RTC },
187 { 2, TWL4030_BASEADD_PWM },
188 { 2, TWL4030_BASEADD_LED },
189 { 3, TWL4030_BASEADD_SECURED_REG },
190
191 /* TWL4030 specific IPs */
192 { 1, TWL4030_BASEADD_AUDIO_VOICE },
193 { 1, TWL4030_BASEADD_GPIO },
194 { 1, TWL4030_BASEADD_INTBR },
195 { 1, TWL4030_BASEADD_TEST },
196 { 2, TWL4030_BASEADD_KEYPAD },
197
198 { 2, TWL4030_BASEADD_MADC },
199 { 2, TWL4030_BASEADD_INTERRUPTS },
200 { 2, TWL4030_BASEADD_PRECHARGE },
201 { 3, TWL4030_BASEADD_BACKUP },
202 { 3, TWL4030_BASEADD_INT },
203
204 { 2, TWL5031_BASEADD_ACCESSORY },
205 { 2, TWL5031_BASEADD_INTERRUPTS },
206 };
207
208 static struct regmap_config twl4030_regmap_config[4] = {
209 {
210 /* Address 0x48 */
211 .reg_bits = 8,
212 .val_bits = 8,
213 .max_register = 0xff,
214 },
215 {
216 /* Address 0x49 */
217 .reg_bits = 8,
218 .val_bits = 8,
219 .max_register = 0xff,
220 },
221 {
222 /* Address 0x4a */
223 .reg_bits = 8,
224 .val_bits = 8,
225 .max_register = 0xff,
226 },
227 {
228 /* Address 0x4b */
229 .reg_bits = 8,
230 .val_bits = 8,
231 .max_register = 0xff,
232 },
233 };
234
235 static struct twl_mapping twl6030_map[] = {
236 /*
237 * NOTE: don't change this table without updating the
238 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
239 * so they continue to match the order in this table.
240 */
241
242 /* Common IPs */
243 { 1, TWL6030_BASEADD_USB },
244 { 1, TWL6030_BASEADD_PIH },
245 { 1, TWL6030_BASEADD_CHARGER },
246 { 0, TWL6030_BASEADD_PM_MASTER },
247 { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
248
249 { 0, TWL6030_BASEADD_RTC },
250 { 1, TWL6030_BASEADD_PWM },
251 { 1, TWL6030_BASEADD_LED },
252 { 0, TWL6030_BASEADD_SECURED_REG },
253
254 /* TWL6030 specific IPs */
255 { 0, TWL6030_BASEADD_ZERO },
256 { 1, TWL6030_BASEADD_ZERO },
257 { 2, TWL6030_BASEADD_ZERO },
258 { 1, TWL6030_BASEADD_GPADC_CTRL },
259 { 1, TWL6030_BASEADD_GASGAUGE },
260 };
261
262 static struct regmap_config twl6030_regmap_config[3] = {
263 {
264 /* Address 0x48 */
265 .reg_bits = 8,
266 .val_bits = 8,
267 .max_register = 0xff,
268 },
269 {
270 /* Address 0x49 */
271 .reg_bits = 8,
272 .val_bits = 8,
273 .max_register = 0xff,
274 },
275 {
276 /* Address 0x4a */
277 .reg_bits = 8,
278 .val_bits = 8,
279 .max_register = 0xff,
280 },
281 };
282
283 /*----------------------------------------------------------------------*/
284
285 static inline int twl_get_num_slaves(void)
286 {
287 if (twl_class_is_4030())
288 return 4; /* TWL4030 class have four slave address */
289 else
290 return 3; /* TWL6030 class have three slave address */
291 }
292
293 static inline int twl_get_last_module(void)
294 {
295 if (twl_class_is_4030())
296 return TWL4030_MODULE_LAST;
297 else
298 return TWL6030_MODULE_LAST;
299 }
300
301 /* Exported Functions */
302
303 /**
304 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
305 * @mod_no: module number
306 * @value: an array of num_bytes+1 containing data to write
307 * @reg: register address (just offset will do)
308 * @num_bytes: number of bytes to transfer
309 *
310 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
311 * valid data starts at Offset 1.
312 *
313 * Returns the result of operation - 0 is success
314 */
315 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
316 {
317 int ret;
318 int sid;
319 struct twl_client *twl;
320
321 if (unlikely(mod_no >= twl_get_last_module())) {
322 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
323 return -EPERM;
324 }
325 if (unlikely(!inuse)) {
326 pr_err("%s: not initialized\n", DRIVER_NAME);
327 return -EPERM;
328 }
329
330 sid = twl_map[mod_no].sid;
331 twl = &twl_modules[sid];
332
333 ret = regmap_bulk_write(twl->regmap, twl_map[mod_no].base + reg,
334 value, num_bytes);
335
336 if (ret)
337 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
338 DRIVER_NAME, mod_no, reg, num_bytes);
339
340 return ret;
341 }
342 EXPORT_SYMBOL(twl_i2c_write);
343
344 /**
345 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
346 * @mod_no: module number
347 * @value: an array of num_bytes containing data to be read
348 * @reg: register address (just offset will do)
349 * @num_bytes: number of bytes to transfer
350 *
351 * Returns result of operation - num_bytes is success else failure.
352 */
353 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
354 {
355 int ret;
356 int sid;
357 struct twl_client *twl;
358
359 if (unlikely(mod_no >= twl_get_last_module())) {
360 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
361 return -EPERM;
362 }
363 if (unlikely(!inuse)) {
364 pr_err("%s: not initialized\n", DRIVER_NAME);
365 return -EPERM;
366 }
367
368 sid = twl_map[mod_no].sid;
369 twl = &twl_modules[sid];
370
371 ret = regmap_bulk_read(twl->regmap, twl_map[mod_no].base + reg,
372 value, num_bytes);
373
374 if (ret)
375 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
376 DRIVER_NAME, mod_no, reg, num_bytes);
377
378 return ret;
379 }
380 EXPORT_SYMBOL(twl_i2c_read);
381
382 /**
383 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
384 * @mod_no: module number
385 * @value: the value to be written 8 bit
386 * @reg: register address (just offset will do)
387 *
388 * Returns result of operation - 0 is success
389 */
390 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
391 {
392 return twl_i2c_write(mod_no, &value, reg, 1);
393 }
394 EXPORT_SYMBOL(twl_i2c_write_u8);
395
396 /**
397 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
398 * @mod_no: module number
399 * @value: the value read 8 bit
400 * @reg: register address (just offset will do)
401 *
402 * Returns result of operation - 0 is success
403 */
404 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
405 {
406 return twl_i2c_read(mod_no, value, reg, 1);
407 }
408 EXPORT_SYMBOL(twl_i2c_read_u8);
409
410 /*----------------------------------------------------------------------*/
411
412 /**
413 * twl_read_idcode_register - API to read the IDCODE register.
414 *
415 * Unlocks the IDCODE register and read the 32 bit value.
416 */
417 static int twl_read_idcode_register(void)
418 {
419 int err;
420
421 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
422 REG_UNLOCK_TEST_REG);
423 if (err) {
424 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
425 goto fail;
426 }
427
428 err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
429 REG_IDCODE_7_0, 4);
430 if (err) {
431 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
432 goto fail;
433 }
434
435 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
436 if (err)
437 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
438 fail:
439 return err;
440 }
441
442 /**
443 * twl_get_type - API to get TWL Si type.
444 *
445 * Api to get the TWL Si type from IDCODE value.
446 */
447 int twl_get_type(void)
448 {
449 return TWL_SIL_TYPE(twl_idcode);
450 }
451 EXPORT_SYMBOL_GPL(twl_get_type);
452
453 /**
454 * twl_get_version - API to get TWL Si version.
455 *
456 * Api to get the TWL Si version from IDCODE value.
457 */
458 int twl_get_version(void)
459 {
460 return TWL_SIL_REV(twl_idcode);
461 }
462 EXPORT_SYMBOL_GPL(twl_get_version);
463
464 /**
465 * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
466 *
467 * Api to get the TWL HFCLK rate based on BOOT_CFG register.
468 */
469 int twl_get_hfclk_rate(void)
470 {
471 u8 ctrl;
472 int rate;
473
474 twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
475
476 switch (ctrl & 0x3) {
477 case HFCLK_FREQ_19p2_MHZ:
478 rate = 19200000;
479 break;
480 case HFCLK_FREQ_26_MHZ:
481 rate = 26000000;
482 break;
483 case HFCLK_FREQ_38p4_MHZ:
484 rate = 38400000;
485 break;
486 default:
487 pr_err("TWL4030: HFCLK is not configured\n");
488 rate = -EINVAL;
489 break;
490 }
491
492 return rate;
493 }
494 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
495
496 static struct device *
497 add_numbered_child(unsigned mod_no, const char *name, int num,
498 void *pdata, unsigned pdata_len,
499 bool can_wakeup, int irq0, int irq1)
500 {
501 struct platform_device *pdev;
502 struct twl_client *twl;
503 int status, sid;
504
505 if (unlikely(mod_no >= twl_get_last_module())) {
506 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
507 return ERR_PTR(-EPERM);
508 }
509 sid = twl_map[mod_no].sid;
510 twl = &twl_modules[sid];
511
512 pdev = platform_device_alloc(name, num);
513 if (!pdev) {
514 dev_dbg(&twl->client->dev, "can't alloc dev\n");
515 status = -ENOMEM;
516 goto err;
517 }
518
519 pdev->dev.parent = &twl->client->dev;
520
521 if (pdata) {
522 status = platform_device_add_data(pdev, pdata, pdata_len);
523 if (status < 0) {
524 dev_dbg(&pdev->dev, "can't add platform_data\n");
525 goto err;
526 }
527 }
528
529 if (irq0) {
530 struct resource r[2] = {
531 { .start = irq0, .flags = IORESOURCE_IRQ, },
532 { .start = irq1, .flags = IORESOURCE_IRQ, },
533 };
534
535 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
536 if (status < 0) {
537 dev_dbg(&pdev->dev, "can't add irqs\n");
538 goto err;
539 }
540 }
541
542 status = platform_device_add(pdev);
543 if (status == 0)
544 device_init_wakeup(&pdev->dev, can_wakeup);
545
546 err:
547 if (status < 0) {
548 platform_device_put(pdev);
549 dev_err(&twl->client->dev, "can't add %s dev\n", name);
550 return ERR_PTR(status);
551 }
552 return &pdev->dev;
553 }
554
555 static inline struct device *add_child(unsigned mod_no, const char *name,
556 void *pdata, unsigned pdata_len,
557 bool can_wakeup, int irq0, int irq1)
558 {
559 return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
560 can_wakeup, irq0, irq1);
561 }
562
563 static struct device *
564 add_regulator_linked(int num, struct regulator_init_data *pdata,
565 struct regulator_consumer_supply *consumers,
566 unsigned num_consumers, unsigned long features)
567 {
568 struct twl_regulator_driver_data drv_data;
569
570 /* regulator framework demands init_data ... */
571 if (!pdata)
572 return NULL;
573
574 if (consumers) {
575 pdata->consumer_supplies = consumers;
576 pdata->num_consumer_supplies = num_consumers;
577 }
578
579 if (pdata->driver_data) {
580 /* If we have existing drv_data, just add the flags */
581 struct twl_regulator_driver_data *tmp;
582 tmp = pdata->driver_data;
583 tmp->features |= features;
584 } else {
585 /* add new driver data struct, used only during init */
586 drv_data.features = features;
587 drv_data.set_voltage = NULL;
588 drv_data.get_voltage = NULL;
589 drv_data.data = NULL;
590 pdata->driver_data = &drv_data;
591 }
592
593 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
594 return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
595 pdata, sizeof(*pdata), false, 0, 0);
596 }
597
598 static struct device *
599 add_regulator(int num, struct regulator_init_data *pdata,
600 unsigned long features)
601 {
602 return add_regulator_linked(num, pdata, NULL, 0, features);
603 }
604
605 /*
606 * NOTE: We know the first 8 IRQs after pdata->base_irq are
607 * for the PIH, and the next are for the PWR_INT SIH, since
608 * that's how twl_init_irq() sets things up.
609 */
610
611 static int
612 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
613 unsigned long features)
614 {
615 struct device *child;
616
617 if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
618 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
619 pdata->gpio, sizeof(*pdata->gpio),
620 false, irq_base + GPIO_INTR_OFFSET, 0);
621 if (IS_ERR(child))
622 return PTR_ERR(child);
623 }
624
625 if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
626 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
627 pdata->keypad, sizeof(*pdata->keypad),
628 true, irq_base + KEYPAD_INTR_OFFSET, 0);
629 if (IS_ERR(child))
630 return PTR_ERR(child);
631 }
632
633 if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
634 twl_class_is_4030()) {
635 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
636 pdata->madc, sizeof(*pdata->madc),
637 true, irq_base + MADC_INTR_OFFSET, 0);
638 if (IS_ERR(child))
639 return PTR_ERR(child);
640 }
641
642 if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
643 /*
644 * REVISIT platform_data here currently might expose the
645 * "msecure" line ... but for now we just expect board
646 * setup to tell the chip "it's always ok to SET_TIME".
647 * Eventually, Linux might become more aware of such
648 * HW security concerns, and "least privilege".
649 */
650 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
651 true, irq_base + RTC_INTR_OFFSET, 0);
652 if (IS_ERR(child))
653 return PTR_ERR(child);
654 }
655
656 if (IS_ENABLED(CONFIG_PWM_TWL)) {
657 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
658 false, 0, 0);
659 if (IS_ERR(child))
660 return PTR_ERR(child);
661 }
662
663 if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
664 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
665 false, 0, 0);
666 if (IS_ERR(child))
667 return PTR_ERR(child);
668 }
669
670 if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
671 twl_class_is_4030()) {
672
673 static struct regulator_consumer_supply usb1v5 = {
674 .supply = "usb1v5",
675 };
676 static struct regulator_consumer_supply usb1v8 = {
677 .supply = "usb1v8",
678 };
679 static struct regulator_consumer_supply usb3v1[] = {
680 { .supply = "usb3v1" },
681 { .supply = "bci3v1" },
682 };
683
684 /* First add the regulators so that they can be used by transceiver */
685 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
686 /* this is a template that gets copied */
687 struct regulator_init_data usb_fixed = {
688 .constraints.valid_modes_mask =
689 REGULATOR_MODE_NORMAL
690 | REGULATOR_MODE_STANDBY,
691 .constraints.valid_ops_mask =
692 REGULATOR_CHANGE_MODE
693 | REGULATOR_CHANGE_STATUS,
694 };
695
696 child = add_regulator_linked(TWL4030_REG_VUSB1V5,
697 &usb_fixed, &usb1v5, 1,
698 features);
699 if (IS_ERR(child))
700 return PTR_ERR(child);
701
702 child = add_regulator_linked(TWL4030_REG_VUSB1V8,
703 &usb_fixed, &usb1v8, 1,
704 features);
705 if (IS_ERR(child))
706 return PTR_ERR(child);
707
708 child = add_regulator_linked(TWL4030_REG_VUSB3V1,
709 &usb_fixed, usb3v1, 2,
710 features);
711 if (IS_ERR(child))
712 return PTR_ERR(child);
713
714 }
715
716 child = add_child(TWL_MODULE_USB, "twl4030_usb",
717 pdata->usb, sizeof(*pdata->usb), true,
718 /* irq0 = USB_PRES, irq1 = USB */
719 irq_base + USB_PRES_INTR_OFFSET,
720 irq_base + USB_INTR_OFFSET);
721
722 if (IS_ERR(child))
723 return PTR_ERR(child);
724
725 /* we need to connect regulators to this transceiver */
726 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
727 usb1v5.dev_name = dev_name(child);
728 usb1v8.dev_name = dev_name(child);
729 usb3v1[0].dev_name = dev_name(child);
730 }
731 }
732 if (IS_ENABLED(CONFIG_TWL6030_USB) && pdata->usb &&
733 twl_class_is_6030()) {
734
735 static struct regulator_consumer_supply usb3v3;
736 int regulator;
737
738 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
739 /* this is a template that gets copied */
740 struct regulator_init_data usb_fixed = {
741 .constraints.valid_modes_mask =
742 REGULATOR_MODE_NORMAL
743 | REGULATOR_MODE_STANDBY,
744 .constraints.valid_ops_mask =
745 REGULATOR_CHANGE_MODE
746 | REGULATOR_CHANGE_STATUS,
747 };
748
749 if (features & TWL6025_SUBCLASS) {
750 usb3v3.supply = "ldousb";
751 regulator = TWL6025_REG_LDOUSB;
752 } else {
753 usb3v3.supply = "vusb";
754 regulator = TWL6030_REG_VUSB;
755 }
756 child = add_regulator_linked(regulator, &usb_fixed,
757 &usb3v3, 1,
758 features);
759 if (IS_ERR(child))
760 return PTR_ERR(child);
761 }
762
763 pdata->usb->features = features;
764
765 child = add_child(TWL_MODULE_USB, "twl6030_usb",
766 pdata->usb, sizeof(*pdata->usb), true,
767 /* irq1 = VBUS_PRES, irq0 = USB ID */
768 irq_base + USBOTG_INTR_OFFSET,
769 irq_base + USB_PRES_INTR_OFFSET);
770
771 if (IS_ERR(child))
772 return PTR_ERR(child);
773 /* we need to connect regulators to this transceiver */
774 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child)
775 usb3v3.dev_name = dev_name(child);
776 } else if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) &&
777 twl_class_is_6030()) {
778 if (features & TWL6025_SUBCLASS)
779 child = add_regulator(TWL6025_REG_LDOUSB,
780 pdata->ldousb, features);
781 else
782 child = add_regulator(TWL6030_REG_VUSB,
783 pdata->vusb, features);
784
785 if (IS_ERR(child))
786 return PTR_ERR(child);
787 }
788
789 if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
790 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
791 0, false, 0, 0);
792 if (IS_ERR(child))
793 return PTR_ERR(child);
794 }
795
796 if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
797 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
798 NULL, 0, true, irq_base + 8 + 0, 0);
799 if (IS_ERR(child))
800 return PTR_ERR(child);
801 }
802
803 if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
804 twl_class_is_4030()) {
805 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
806 pdata->audio, sizeof(*pdata->audio),
807 false, 0, 0);
808 if (IS_ERR(child))
809 return PTR_ERR(child);
810 }
811
812 /* twl4030 regulators */
813 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
814 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
815 features);
816 if (IS_ERR(child))
817 return PTR_ERR(child);
818
819 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
820 features);
821 if (IS_ERR(child))
822 return PTR_ERR(child);
823
824 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
825 features);
826 if (IS_ERR(child))
827 return PTR_ERR(child);
828
829 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
830 features);
831 if (IS_ERR(child))
832 return PTR_ERR(child);
833
834 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
835 features);
836 if (IS_ERR(child))
837 return PTR_ERR(child);
838
839 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
840 features);
841 if (IS_ERR(child))
842 return PTR_ERR(child);
843
844 child = add_regulator((features & TWL4030_VAUX2)
845 ? TWL4030_REG_VAUX2_4030
846 : TWL4030_REG_VAUX2,
847 pdata->vaux2, features);
848 if (IS_ERR(child))
849 return PTR_ERR(child);
850
851 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
852 features);
853 if (IS_ERR(child))
854 return PTR_ERR(child);
855
856 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
857 features);
858 if (IS_ERR(child))
859 return PTR_ERR(child);
860
861 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
862 features);
863 if (IS_ERR(child))
864 return PTR_ERR(child);
865 }
866
867 /* maybe add LDOs that are omitted on cost-reduced parts */
868 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
869 && twl_class_is_4030()) {
870 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
871 features);
872 if (IS_ERR(child))
873 return PTR_ERR(child);
874
875 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
876 features);
877 if (IS_ERR(child))
878 return PTR_ERR(child);
879
880 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
881 features);
882 if (IS_ERR(child))
883 return PTR_ERR(child);
884
885 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
886 features);
887 if (IS_ERR(child))
888 return PTR_ERR(child);
889
890 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
891 features);
892 if (IS_ERR(child))
893 return PTR_ERR(child);
894
895 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
896 features);
897 if (IS_ERR(child))
898 return PTR_ERR(child);
899 }
900
901 /* twl6030 regulators */
902 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() &&
903 !(features & TWL6025_SUBCLASS)) {
904 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
905 features);
906 if (IS_ERR(child))
907 return PTR_ERR(child);
908
909 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
910 features);
911 if (IS_ERR(child))
912 return PTR_ERR(child);
913
914 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
915 features);
916 if (IS_ERR(child))
917 return PTR_ERR(child);
918
919 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8,
920 features);
921 if (IS_ERR(child))
922 return PTR_ERR(child);
923
924 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1,
925 features);
926 if (IS_ERR(child))
927 return PTR_ERR(child);
928
929 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
930 features);
931 if (IS_ERR(child))
932 return PTR_ERR(child);
933
934 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
935 features);
936 if (IS_ERR(child))
937 return PTR_ERR(child);
938
939 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
940 features);
941 if (IS_ERR(child))
942 return PTR_ERR(child);
943
944 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
945 features);
946 if (IS_ERR(child))
947 return PTR_ERR(child);
948
949 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
950 features);
951 if (IS_ERR(child))
952 return PTR_ERR(child);
953
954 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
955 features);
956 if (IS_ERR(child))
957 return PTR_ERR(child);
958
959 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
960 features);
961 if (IS_ERR(child))
962 return PTR_ERR(child);
963
964 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
965 features);
966 if (IS_ERR(child))
967 return PTR_ERR(child);
968
969 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
970 features);
971 if (IS_ERR(child))
972 return PTR_ERR(child);
973 }
974
975 /* 6030 and 6025 share this regulator */
976 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030()) {
977 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
978 features);
979 if (IS_ERR(child))
980 return PTR_ERR(child);
981 }
982
983 /* twl6025 regulators */
984 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() &&
985 (features & TWL6025_SUBCLASS)) {
986 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
987 features);
988 if (IS_ERR(child))
989 return PTR_ERR(child);
990
991 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
992 features);
993 if (IS_ERR(child))
994 return PTR_ERR(child);
995
996 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
997 features);
998 if (IS_ERR(child))
999 return PTR_ERR(child);
1000
1001 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1002 features);
1003 if (IS_ERR(child))
1004 return PTR_ERR(child);
1005
1006 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1007 features);
1008 if (IS_ERR(child))
1009 return PTR_ERR(child);
1010
1011 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1012 features);
1013 if (IS_ERR(child))
1014 return PTR_ERR(child);
1015
1016 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1017 features);
1018 if (IS_ERR(child))
1019 return PTR_ERR(child);
1020
1021 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1022 features);
1023 if (IS_ERR(child))
1024 return PTR_ERR(child);
1025
1026 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1027 features);
1028 if (IS_ERR(child))
1029 return PTR_ERR(child);
1030
1031 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1032 features);
1033 if (IS_ERR(child))
1034 return PTR_ERR(child);
1035
1036 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1037 features);
1038 if (IS_ERR(child))
1039 return PTR_ERR(child);
1040
1041 }
1042
1043 if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
1044 !(features & (TPS_SUBSET | TWL5031))) {
1045 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
1046 pdata->bci, sizeof(*pdata->bci), false,
1047 /* irq0 = CHG_PRES, irq1 = BCI */
1048 irq_base + BCI_PRES_INTR_OFFSET,
1049 irq_base + BCI_INTR_OFFSET);
1050 if (IS_ERR(child))
1051 return PTR_ERR(child);
1052 }
1053
1054 return 0;
1055 }
1056
1057 /*----------------------------------------------------------------------*/
1058
1059 /*
1060 * These three functions initialize the on-chip clock framework,
1061 * letting it generate the right frequencies for USB, MADC, and
1062 * other purposes.
1063 */
1064 static inline int __init protect_pm_master(void)
1065 {
1066 int e = 0;
1067
1068 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
1069 TWL4030_PM_MASTER_PROTECT_KEY);
1070 return e;
1071 }
1072
1073 static inline int __init unprotect_pm_master(void)
1074 {
1075 int e = 0;
1076
1077 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
1078 TWL4030_PM_MASTER_PROTECT_KEY);
1079 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
1080 TWL4030_PM_MASTER_PROTECT_KEY);
1081
1082 return e;
1083 }
1084
1085 static void clocks_init(struct device *dev,
1086 struct twl4030_clock_init_data *clock)
1087 {
1088 int e = 0;
1089 struct clk *osc;
1090 u32 rate;
1091 u8 ctrl = HFCLK_FREQ_26_MHZ;
1092
1093 osc = clk_get(dev, "fck");
1094 if (IS_ERR(osc)) {
1095 printk(KERN_WARNING "Skipping twl internal clock init and "
1096 "using bootloader value (unknown osc rate)\n");
1097 return;
1098 }
1099
1100 rate = clk_get_rate(osc);
1101 clk_put(osc);
1102
1103 switch (rate) {
1104 case 19200000:
1105 ctrl = HFCLK_FREQ_19p2_MHZ;
1106 break;
1107 case 26000000:
1108 ctrl = HFCLK_FREQ_26_MHZ;
1109 break;
1110 case 38400000:
1111 ctrl = HFCLK_FREQ_38p4_MHZ;
1112 break;
1113 }
1114
1115 ctrl |= HIGH_PERF_SQ;
1116 if (clock && clock->ck32k_lowpwr_enable)
1117 ctrl |= CK32K_LOWPWR_EN;
1118
1119 e |= unprotect_pm_master();
1120 /* effect->MADC+USB ck en */
1121 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1122 e |= protect_pm_master();
1123
1124 if (e < 0)
1125 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1126 }
1127
1128 /*----------------------------------------------------------------------*/
1129
1130
1131 static int twl_remove(struct i2c_client *client)
1132 {
1133 unsigned i, num_slaves;
1134 int status;
1135
1136 if (twl_class_is_4030())
1137 status = twl4030_exit_irq();
1138 else
1139 status = twl6030_exit_irq();
1140
1141 if (status < 0)
1142 return status;
1143
1144 num_slaves = twl_get_num_slaves();
1145 for (i = 0; i < num_slaves; i++) {
1146 struct twl_client *twl = &twl_modules[i];
1147
1148 if (twl->client && twl->client != client)
1149 i2c_unregister_device(twl->client);
1150 twl_modules[i].client = NULL;
1151 }
1152 inuse = false;
1153 return 0;
1154 }
1155
1156 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1157 static int
1158 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1159 {
1160 struct twl4030_platform_data *pdata = client->dev.platform_data;
1161 struct device_node *node = client->dev.of_node;
1162 struct platform_device *pdev;
1163 struct regmap_config *twl_regmap_config;
1164 int irq_base = 0;
1165 int status;
1166 unsigned i, num_slaves;
1167
1168 if (!node && !pdata) {
1169 dev_err(&client->dev, "no platform data\n");
1170 return -EINVAL;
1171 }
1172
1173 if (inuse) {
1174 dev_dbg(&client->dev, "only one instance of %s allowed\n",
1175 DRIVER_NAME);
1176 return -EBUSY;
1177 }
1178
1179 pdev = platform_device_alloc(DRIVER_NAME, -1);
1180 if (!pdev) {
1181 dev_err(&client->dev, "can't alloc pdev\n");
1182 return -ENOMEM;
1183 }
1184
1185 status = platform_device_add(pdev);
1186 if (status) {
1187 platform_device_put(pdev);
1188 return status;
1189 }
1190
1191 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1192 dev_dbg(&client->dev, "can't talk I2C?\n");
1193 status = -EIO;
1194 goto free;
1195 }
1196
1197 if ((id->driver_data) & TWL6030_CLASS) {
1198 twl_id = TWL6030_CLASS_ID;
1199 twl_map = &twl6030_map[0];
1200 /* The charger base address is different in twl6025 */
1201 if ((id->driver_data) & TWL6025_SUBCLASS)
1202 twl_map[TWL_MODULE_MAIN_CHARGE].base =
1203 TWL6025_BASEADD_CHARGER;
1204 twl_regmap_config = twl6030_regmap_config;
1205 } else {
1206 twl_id = TWL4030_CLASS_ID;
1207 twl_map = &twl4030_map[0];
1208 twl_regmap_config = twl4030_regmap_config;
1209 }
1210
1211 num_slaves = twl_get_num_slaves();
1212 twl_modules = devm_kzalloc(&client->dev,
1213 sizeof(struct twl_client) * num_slaves,
1214 GFP_KERNEL);
1215 if (!twl_modules) {
1216 status = -ENOMEM;
1217 goto free;
1218 }
1219
1220 for (i = 0; i < num_slaves; i++) {
1221 struct twl_client *twl = &twl_modules[i];
1222
1223 if (i == 0) {
1224 twl->client = client;
1225 } else {
1226 twl->client = i2c_new_dummy(client->adapter,
1227 client->addr + i);
1228 if (!twl->client) {
1229 dev_err(&client->dev,
1230 "can't attach client %d\n", i);
1231 status = -ENOMEM;
1232 goto fail;
1233 }
1234 }
1235
1236 twl->regmap = devm_regmap_init_i2c(twl->client,
1237 &twl_regmap_config[i]);
1238 if (IS_ERR(twl->regmap)) {
1239 status = PTR_ERR(twl->regmap);
1240 dev_err(&client->dev,
1241 "Failed to allocate regmap %d, err: %d\n", i,
1242 status);
1243 goto fail;
1244 }
1245 }
1246
1247 inuse = true;
1248
1249 /* setup clock framework */
1250 clocks_init(&pdev->dev, pdata ? pdata->clock : NULL);
1251
1252 /* read TWL IDCODE Register */
1253 if (twl_id == TWL4030_CLASS_ID) {
1254 status = twl_read_idcode_register();
1255 WARN(status < 0, "Error: reading twl_idcode register value\n");
1256 }
1257
1258 /* load power event scripts */
1259 if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata && pdata->power)
1260 twl4030_power_init(pdata->power);
1261
1262 /* Maybe init the T2 Interrupt subsystem */
1263 if (client->irq) {
1264 if (twl_class_is_4030()) {
1265 twl4030_init_chip_irq(id->name);
1266 irq_base = twl4030_init_irq(&client->dev, client->irq);
1267 } else {
1268 irq_base = twl6030_init_irq(&client->dev, client->irq);
1269 }
1270
1271 if (irq_base < 0) {
1272 status = irq_base;
1273 goto fail;
1274 }
1275 }
1276
1277 /*
1278 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1279 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1280 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1281 */
1282 if (twl_class_is_4030()) {
1283 u8 temp;
1284
1285 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1286 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1287 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1288 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1289 }
1290
1291 if (node)
1292 status = of_platform_populate(node, NULL, NULL, &client->dev);
1293 else
1294 status = add_children(pdata, irq_base, id->driver_data);
1295
1296 fail:
1297 if (status < 0)
1298 twl_remove(client);
1299 free:
1300 if (status < 0)
1301 platform_device_unregister(pdev);
1302
1303 return status;
1304 }
1305
1306 static const struct i2c_device_id twl_ids[] = {
1307 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
1308 { "twl5030", 0 }, /* T2 updated */
1309 { "twl5031", TWL5031 }, /* TWL5030 updated */
1310 { "tps65950", 0 }, /* catalog version of twl5030 */
1311 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
1312 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
1313 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED
1314 and vibrator. Charger in USB module*/
1315 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
1316 { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1317 { /* end of list */ },
1318 };
1319 MODULE_DEVICE_TABLE(i2c, twl_ids);
1320
1321 /* One Client Driver , 4 Clients */
1322 static struct i2c_driver twl_driver = {
1323 .driver.name = DRIVER_NAME,
1324 .id_table = twl_ids,
1325 .probe = twl_probe,
1326 .remove = twl_remove,
1327 };
1328
1329 static int __init twl_init(void)
1330 {
1331 return i2c_add_driver(&twl_driver);
1332 }
1333 subsys_initcall(twl_init);
1334
1335 static void __exit twl_exit(void)
1336 {
1337 i2c_del_driver(&twl_driver);
1338 }
1339 module_exit(twl_exit);
1340
1341 MODULE_AUTHOR("Texas Instruments, Inc.");
1342 MODULE_DESCRIPTION("I2C Core interface for TWL");
1343 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)