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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/platform_device.h>
34#include <linux/clk.h>
35#include <linux/err.h>
36
37#include <linux/regulator/machine.h>
38
39#include <linux/i2c.h>
40#include <linux/i2c/twl.h>
41
42#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
43#include <plat/cpu.h>
44#endif
45
46/*
47 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
48 * Management and System Companion Device" chips originally designed for
49 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
50 * often at around 3 Mbit/sec, including for interrupt handling.
51 *
52 * This driver core provides genirq support for the interrupts emitted,
53 * by the various modules, and exports register access primitives.
54 *
55 * FIXME this driver currently requires use of the first interrupt line
56 * (and associated registers).
57 */
58
59#define DRIVER_NAME "twl"
60
61#if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
62#define twl_has_keypad() true
63#else
64#define twl_has_keypad() false
65#endif
66
67#if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
68#define twl_has_gpio() true
69#else
70#define twl_has_gpio() false
71#endif
72
73#if defined(CONFIG_REGULATOR_TWL4030) \
74 || defined(CONFIG_REGULATOR_TWL4030_MODULE)
75#define twl_has_regulator() true
76#else
77#define twl_has_regulator() false
78#endif
79
80#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
81#define twl_has_madc() true
82#else
83#define twl_has_madc() false
84#endif
85
86#ifdef CONFIG_TWL4030_POWER
87#define twl_has_power() true
88#else
89#define twl_has_power() false
90#endif
91
92#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
93#define twl_has_rtc() true
94#else
95#define twl_has_rtc() false
96#endif
97
98#if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
99 defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
100#define twl_has_usb() true
101#else
102#define twl_has_usb() false
103#endif
104
105#if defined(CONFIG_TWL4030_WATCHDOG) || \
106 defined(CONFIG_TWL4030_WATCHDOG_MODULE)
107#define twl_has_watchdog() true
108#else
109#define twl_has_watchdog() false
110#endif
111
112#if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) ||\
113 defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
114#define twl_has_codec() true
115#else
116#define twl_has_codec() false
117#endif
118
119#if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
120#define twl_has_bci() true
121#else
122#define twl_has_bci() false
123#endif
124
125/* Triton Core internal information (BEGIN) */
126
127/* Last - for index max*/
128#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
129
130#define TWL_NUM_SLAVES 4
131
132#if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
133 || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
134#define twl_has_pwrbutton() true
135#else
136#define twl_has_pwrbutton() false
137#endif
138
139#define SUB_CHIP_ID0 0
140#define SUB_CHIP_ID1 1
141#define SUB_CHIP_ID2 2
142#define SUB_CHIP_ID3 3
143
144#define TWL_MODULE_LAST TWL4030_MODULE_LAST
145
146/* Base Address defns for twl4030_map[] */
147
148/* subchip/slave 0 - USB ID */
149#define TWL4030_BASEADD_USB 0x0000
150
151/* subchip/slave 1 - AUD ID */
152#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
153#define TWL4030_BASEADD_GPIO 0x0098
154#define TWL4030_BASEADD_INTBR 0x0085
155#define TWL4030_BASEADD_PIH 0x0080
156#define TWL4030_BASEADD_TEST 0x004C
157
158/* subchip/slave 2 - AUX ID */
159#define TWL4030_BASEADD_INTERRUPTS 0x00B9
160#define TWL4030_BASEADD_LED 0x00EE
161#define TWL4030_BASEADD_MADC 0x0000
162#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
163#define TWL4030_BASEADD_PRECHARGE 0x00AA
164#define TWL4030_BASEADD_PWM0 0x00F8
165#define TWL4030_BASEADD_PWM1 0x00FB
166#define TWL4030_BASEADD_PWMA 0x00EF
167#define TWL4030_BASEADD_PWMB 0x00F1
168#define TWL4030_BASEADD_KEYPAD 0x00D2
169
170#define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
171#define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
172 one */
173
174/* subchip/slave 3 - POWER ID */
175#define TWL4030_BASEADD_BACKUP 0x0014
176#define TWL4030_BASEADD_INT 0x002E
177#define TWL4030_BASEADD_PM_MASTER 0x0036
178#define TWL4030_BASEADD_PM_RECEIVER 0x005B
179#define TWL4030_BASEADD_RTC 0x001C
180#define TWL4030_BASEADD_SECURED_REG 0x0000
181
182/* Triton Core internal information (END) */
183
184
185/* subchip/slave 0 0x48 - POWER */
186#define TWL6030_BASEADD_RTC 0x0000
187#define TWL6030_BASEADD_MEM 0x0017
188#define TWL6030_BASEADD_PM_MASTER 0x001F
189#define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
190#define TWL6030_BASEADD_PM_MISC 0x00E2
191#define TWL6030_BASEADD_PM_PUPD 0x00F0
192
193/* subchip/slave 1 0x49 - FEATURE */
194#define TWL6030_BASEADD_USB 0x0000
195#define TWL6030_BASEADD_GPADC_CTRL 0x002E
196#define TWL6030_BASEADD_AUX 0x0090
197#define TWL6030_BASEADD_PWM 0x00BA
198#define TWL6030_BASEADD_GASGAUGE 0x00C0
199#define TWL6030_BASEADD_PIH 0x00D0
200#define TWL6030_BASEADD_CHARGER 0x00E0
201#define TWL6025_BASEADD_CHARGER 0x00DA
202
203/* subchip/slave 2 0x4A - DFT */
204#define TWL6030_BASEADD_DIEID 0x00C0
205
206/* subchip/slave 3 0x4B - AUDIO */
207#define TWL6030_BASEADD_AUDIO 0x0000
208#define TWL6030_BASEADD_RSV 0x0000
209#define TWL6030_BASEADD_ZERO 0x0000
210
211/* Few power values */
212#define R_CFG_BOOT 0x05
213
214/* some fields in R_CFG_BOOT */
215#define HFCLK_FREQ_19p2_MHZ (1 << 0)
216#define HFCLK_FREQ_26_MHZ (2 << 0)
217#define HFCLK_FREQ_38p4_MHZ (3 << 0)
218#define HIGH_PERF_SQ (1 << 3)
219#define CK32K_LOWPWR_EN (1 << 7)
220
221
222/* chip-specific feature flags, for i2c_device_id.driver_data */
223#define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */
224#define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */
225#define TWL5031 BIT(2) /* twl5031 has different registers */
226#define TWL6030_CLASS BIT(3) /* TWL6030 class */
227
228/*----------------------------------------------------------------------*/
229
230/* is driver active, bound to a chip? */
231static bool inuse;
232
233/* TWL IDCODE Register value */
234static u32 twl_idcode;
235
236static unsigned int twl_id;
237unsigned int twl_rev(void)
238{
239 return twl_id;
240}
241EXPORT_SYMBOL(twl_rev);
242
243/* Structure for each TWL4030/TWL6030 Slave */
244struct twl_client {
245 struct i2c_client *client;
246 u8 address;
247
248 /* max numb of i2c_msg required is for read =2 */
249 struct i2c_msg xfer_msg[2];
250
251 /* To lock access to xfer_msg */
252 struct mutex xfer_lock;
253};
254
255static struct twl_client twl_modules[TWL_NUM_SLAVES];
256
257
258/* mapping the module id to slave id and base address */
259struct twl_mapping {
260 unsigned char sid; /* Slave ID */
261 unsigned char base; /* base address */
262};
263static struct twl_mapping *twl_map;
264
265static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
266 /*
267 * NOTE: don't change this table without updating the
268 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
269 * so they continue to match the order in this table.
270 */
271
272 { 0, TWL4030_BASEADD_USB },
273
274 { 1, TWL4030_BASEADD_AUDIO_VOICE },
275 { 1, TWL4030_BASEADD_GPIO },
276 { 1, TWL4030_BASEADD_INTBR },
277 { 1, TWL4030_BASEADD_PIH },
278 { 1, TWL4030_BASEADD_TEST },
279
280 { 2, TWL4030_BASEADD_KEYPAD },
281 { 2, TWL4030_BASEADD_MADC },
282 { 2, TWL4030_BASEADD_INTERRUPTS },
283 { 2, TWL4030_BASEADD_LED },
284 { 2, TWL4030_BASEADD_MAIN_CHARGE },
285 { 2, TWL4030_BASEADD_PRECHARGE },
286 { 2, TWL4030_BASEADD_PWM0 },
287 { 2, TWL4030_BASEADD_PWM1 },
288 { 2, TWL4030_BASEADD_PWMA },
289 { 2, TWL4030_BASEADD_PWMB },
290 { 2, TWL5031_BASEADD_ACCESSORY },
291 { 2, TWL5031_BASEADD_INTERRUPTS },
292
293 { 3, TWL4030_BASEADD_BACKUP },
294 { 3, TWL4030_BASEADD_INT },
295 { 3, TWL4030_BASEADD_PM_MASTER },
296 { 3, TWL4030_BASEADD_PM_RECEIVER },
297 { 3, TWL4030_BASEADD_RTC },
298 { 3, TWL4030_BASEADD_SECURED_REG },
299};
300
301static struct twl_mapping twl6030_map[] = {
302 /*
303 * NOTE: don't change this table without updating the
304 * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
305 * so they continue to match the order in this table.
306 */
307 { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
308 { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
309 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
310 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
311 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
312
313 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
314 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
315 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
316 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
317 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
318
319 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
320 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
321 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
322 { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
323 { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
324
325 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
326 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
327 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
328 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
329 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
330 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
331 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
332
333 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
334 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
335 { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
336};
337
338/*----------------------------------------------------------------------*/
339
340/* Exported Functions */
341
342/**
343 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
344 * @mod_no: module number
345 * @value: an array of num_bytes+1 containing data to write
346 * @reg: register address (just offset will do)
347 * @num_bytes: number of bytes to transfer
348 *
349 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
350 * valid data starts at Offset 1.
351 *
352 * Returns the result of operation - 0 is success
353 */
354int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
355{
356 int ret;
357 int sid;
358 struct twl_client *twl;
359 struct i2c_msg *msg;
360
361 if (unlikely(mod_no > TWL_MODULE_LAST)) {
362 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
363 return -EPERM;
364 }
365 sid = twl_map[mod_no].sid;
366 twl = &twl_modules[sid];
367
368 if (unlikely(!inuse)) {
369 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
370 return -EPERM;
371 }
372 mutex_lock(&twl->xfer_lock);
373 /*
374 * [MSG1]: fill the register address data
375 * fill the data Tx buffer
376 */
377 msg = &twl->xfer_msg[0];
378 msg->addr = twl->address;
379 msg->len = num_bytes + 1;
380 msg->flags = 0;
381 msg->buf = value;
382 /* over write the first byte of buffer with the register address */
383 *value = twl_map[mod_no].base + reg;
384 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
385 mutex_unlock(&twl->xfer_lock);
386
387 /* i2c_transfer returns number of messages transferred */
388 if (ret != 1) {
389 pr_err("%s: i2c_write failed to transfer all messages\n",
390 DRIVER_NAME);
391 if (ret < 0)
392 return ret;
393 else
394 return -EIO;
395 } else {
396 return 0;
397 }
398}
399EXPORT_SYMBOL(twl_i2c_write);
400
401/**
402 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
403 * @mod_no: module number
404 * @value: an array of num_bytes containing data to be read
405 * @reg: register address (just offset will do)
406 * @num_bytes: number of bytes to transfer
407 *
408 * Returns result of operation - num_bytes is success else failure.
409 */
410int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
411{
412 int ret;
413 u8 val;
414 int sid;
415 struct twl_client *twl;
416 struct i2c_msg *msg;
417
418 if (unlikely(mod_no > TWL_MODULE_LAST)) {
419 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
420 return -EPERM;
421 }
422 sid = twl_map[mod_no].sid;
423 twl = &twl_modules[sid];
424
425 if (unlikely(!inuse)) {
426 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
427 return -EPERM;
428 }
429 mutex_lock(&twl->xfer_lock);
430 /* [MSG1] fill the register address data */
431 msg = &twl->xfer_msg[0];
432 msg->addr = twl->address;
433 msg->len = 1;
434 msg->flags = 0; /* Read the register value */
435 val = twl_map[mod_no].base + reg;
436 msg->buf = &val;
437 /* [MSG2] fill the data rx buffer */
438 msg = &twl->xfer_msg[1];
439 msg->addr = twl->address;
440 msg->flags = I2C_M_RD; /* Read the register value */
441 msg->len = num_bytes; /* only n bytes */
442 msg->buf = value;
443 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
444 mutex_unlock(&twl->xfer_lock);
445
446 /* i2c_transfer returns number of messages transferred */
447 if (ret != 2) {
448 pr_err("%s: i2c_read failed to transfer all messages\n",
449 DRIVER_NAME);
450 if (ret < 0)
451 return ret;
452 else
453 return -EIO;
454 } else {
455 return 0;
456 }
457}
458EXPORT_SYMBOL(twl_i2c_read);
459
460/**
461 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
462 * @mod_no: module number
463 * @value: the value to be written 8 bit
464 * @reg: register address (just offset will do)
465 *
466 * Returns result of operation - 0 is success
467 */
468int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
469{
470
471 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
472 u8 temp_buffer[2] = { 0 };
473 /* offset 1 contains the data */
474 temp_buffer[1] = value;
475 return twl_i2c_write(mod_no, temp_buffer, reg, 1);
476}
477EXPORT_SYMBOL(twl_i2c_write_u8);
478
479/**
480 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
481 * @mod_no: module number
482 * @value: the value read 8 bit
483 * @reg: register address (just offset will do)
484 *
485 * Returns result of operation - 0 is success
486 */
487int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
488{
489 return twl_i2c_read(mod_no, value, reg, 1);
490}
491EXPORT_SYMBOL(twl_i2c_read_u8);
492
493/*----------------------------------------------------------------------*/
494
495/**
496 * twl_read_idcode_register - API to read the IDCODE register.
497 *
498 * Unlocks the IDCODE register and read the 32 bit value.
499 */
500static int twl_read_idcode_register(void)
501{
502 int err;
503
504 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
505 REG_UNLOCK_TEST_REG);
506 if (err) {
507 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
508 goto fail;
509 }
510
511 err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
512 REG_IDCODE_7_0, 4);
513 if (err) {
514 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
515 goto fail;
516 }
517
518 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
519 if (err)
520 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
521fail:
522 return err;
523}
524
525/**
526 * twl_get_type - API to get TWL Si type.
527 *
528 * Api to get the TWL Si type from IDCODE value.
529 */
530int twl_get_type(void)
531{
532 return TWL_SIL_TYPE(twl_idcode);
533}
534EXPORT_SYMBOL_GPL(twl_get_type);
535
536/**
537 * twl_get_version - API to get TWL Si version.
538 *
539 * Api to get the TWL Si version from IDCODE value.
540 */
541int twl_get_version(void)
542{
543 return TWL_SIL_REV(twl_idcode);
544}
545EXPORT_SYMBOL_GPL(twl_get_version);
546
547static struct device *
548add_numbered_child(unsigned chip, const char *name, int num,
549 void *pdata, unsigned pdata_len,
550 bool can_wakeup, int irq0, int irq1)
551{
552 struct platform_device *pdev;
553 struct twl_client *twl = &twl_modules[chip];
554 int status;
555
556 pdev = platform_device_alloc(name, num);
557 if (!pdev) {
558 dev_dbg(&twl->client->dev, "can't alloc dev\n");
559 status = -ENOMEM;
560 goto err;
561 }
562
563 device_init_wakeup(&pdev->dev, can_wakeup);
564 pdev->dev.parent = &twl->client->dev;
565
566 if (pdata) {
567 status = platform_device_add_data(pdev, pdata, pdata_len);
568 if (status < 0) {
569 dev_dbg(&pdev->dev, "can't add platform_data\n");
570 goto err;
571 }
572 }
573
574 if (irq0) {
575 struct resource r[2] = {
576 { .start = irq0, .flags = IORESOURCE_IRQ, },
577 { .start = irq1, .flags = IORESOURCE_IRQ, },
578 };
579
580 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
581 if (status < 0) {
582 dev_dbg(&pdev->dev, "can't add irqs\n");
583 goto err;
584 }
585 }
586
587 status = platform_device_add(pdev);
588
589err:
590 if (status < 0) {
591 platform_device_put(pdev);
592 dev_err(&twl->client->dev, "can't add %s dev\n", name);
593 return ERR_PTR(status);
594 }
595 return &pdev->dev;
596}
597
598static inline struct device *add_child(unsigned chip, const char *name,
599 void *pdata, unsigned pdata_len,
600 bool can_wakeup, int irq0, int irq1)
601{
602 return add_numbered_child(chip, name, -1, pdata, pdata_len,
603 can_wakeup, irq0, irq1);
604}
605
606static struct device *
607add_regulator_linked(int num, struct regulator_init_data *pdata,
608 struct regulator_consumer_supply *consumers,
609 unsigned num_consumers, unsigned long features)
610{
611 unsigned sub_chip_id;
612 /* regulator framework demands init_data ... */
613 if (!pdata)
614 return NULL;
615
616 if (consumers) {
617 pdata->consumer_supplies = consumers;
618 pdata->num_consumer_supplies = num_consumers;
619 }
620
621 pdata->driver_data = (void *)features;
622
623 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
624 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
625 return add_numbered_child(sub_chip_id, "twl_reg", num,
626 pdata, sizeof(*pdata), false, 0, 0);
627}
628
629static struct device *
630add_regulator(int num, struct regulator_init_data *pdata,
631 unsigned long features)
632{
633 return add_regulator_linked(num, pdata, NULL, 0, features);
634}
635
636/*
637 * NOTE: We know the first 8 IRQs after pdata->base_irq are
638 * for the PIH, and the next are for the PWR_INT SIH, since
639 * that's how twl_init_irq() sets things up.
640 */
641
642static int
643add_children(struct twl4030_platform_data *pdata, unsigned long features)
644{
645 struct device *child;
646 unsigned sub_chip_id;
647
648 if (twl_has_gpio() && pdata->gpio) {
649 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
650 pdata->gpio, sizeof(*pdata->gpio),
651 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
652 if (IS_ERR(child))
653 return PTR_ERR(child);
654 }
655
656 if (twl_has_keypad() && pdata->keypad) {
657 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
658 pdata->keypad, sizeof(*pdata->keypad),
659 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
660 if (IS_ERR(child))
661 return PTR_ERR(child);
662 }
663
664 if (twl_has_madc() && pdata->madc) {
665 child = add_child(2, "twl4030_madc",
666 pdata->madc, sizeof(*pdata->madc),
667 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
668 if (IS_ERR(child))
669 return PTR_ERR(child);
670 }
671
672 if (twl_has_rtc()) {
673 /*
674 * REVISIT platform_data here currently might expose the
675 * "msecure" line ... but for now we just expect board
676 * setup to tell the chip "it's always ok to SET_TIME".
677 * Eventually, Linux might become more aware of such
678 * HW security concerns, and "least privilege".
679 */
680 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
681 child = add_child(sub_chip_id, "twl_rtc",
682 NULL, 0,
683 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
684 if (IS_ERR(child))
685 return PTR_ERR(child);
686 }
687
688 if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
689
690 static struct regulator_consumer_supply usb1v5 = {
691 .supply = "usb1v5",
692 };
693 static struct regulator_consumer_supply usb1v8 = {
694 .supply = "usb1v8",
695 };
696 static struct regulator_consumer_supply usb3v1 = {
697 .supply = "usb3v1",
698 };
699
700 /* First add the regulators so that they can be used by transceiver */
701 if (twl_has_regulator()) {
702 /* this is a template that gets copied */
703 struct regulator_init_data usb_fixed = {
704 .constraints.valid_modes_mask =
705 REGULATOR_MODE_NORMAL
706 | REGULATOR_MODE_STANDBY,
707 .constraints.valid_ops_mask =
708 REGULATOR_CHANGE_MODE
709 | REGULATOR_CHANGE_STATUS,
710 };
711
712 child = add_regulator_linked(TWL4030_REG_VUSB1V5,
713 &usb_fixed, &usb1v5, 1,
714 features);
715 if (IS_ERR(child))
716 return PTR_ERR(child);
717
718 child = add_regulator_linked(TWL4030_REG_VUSB1V8,
719 &usb_fixed, &usb1v8, 1,
720 features);
721 if (IS_ERR(child))
722 return PTR_ERR(child);
723
724 child = add_regulator_linked(TWL4030_REG_VUSB3V1,
725 &usb_fixed, &usb3v1, 1,
726 features);
727 if (IS_ERR(child))
728 return PTR_ERR(child);
729
730 }
731
732 child = add_child(0, "twl4030_usb",
733 pdata->usb, sizeof(*pdata->usb),
734 true,
735 /* irq0 = USB_PRES, irq1 = USB */
736 pdata->irq_base + USB_PRES_INTR_OFFSET,
737 pdata->irq_base + USB_INTR_OFFSET);
738
739 if (IS_ERR(child))
740 return PTR_ERR(child);
741
742 /* we need to connect regulators to this transceiver */
743 if (twl_has_regulator() && child) {
744 usb1v5.dev = child;
745 usb1v8.dev = child;
746 usb3v1.dev = child;
747 }
748 }
749 if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
750
751 static struct regulator_consumer_supply usb3v3;
752 int regulator;
753
754 if (twl_has_regulator()) {
755 /* this is a template that gets copied */
756 struct regulator_init_data usb_fixed = {
757 .constraints.valid_modes_mask =
758 REGULATOR_MODE_NORMAL
759 | REGULATOR_MODE_STANDBY,
760 .constraints.valid_ops_mask =
761 REGULATOR_CHANGE_MODE
762 | REGULATOR_CHANGE_STATUS,
763 };
764
765 if (features & TWL6025_SUBCLASS) {
766 usb3v3.supply = "ldousb";
767 regulator = TWL6025_REG_LDOUSB;
768 } else {
769 usb3v3.supply = "vusb";
770 regulator = TWL6030_REG_VUSB;
771 }
772 child = add_regulator_linked(regulator, &usb_fixed,
773 &usb3v3, 1,
774 features);
775 if (IS_ERR(child))
776 return PTR_ERR(child);
777 }
778
779 pdata->usb->features = features;
780
781 child = add_child(0, "twl6030_usb",
782 pdata->usb, sizeof(*pdata->usb),
783 true,
784 /* irq1 = VBUS_PRES, irq0 = USB ID */
785 pdata->irq_base + USBOTG_INTR_OFFSET,
786 pdata->irq_base + USB_PRES_INTR_OFFSET);
787
788 if (IS_ERR(child))
789 return PTR_ERR(child);
790 /* we need to connect regulators to this transceiver */
791 if (twl_has_regulator() && child)
792 usb3v3.dev = child;
793 } else if (twl_has_regulator() && twl_class_is_6030()) {
794 if (features & TWL6025_SUBCLASS)
795 child = add_regulator(TWL6025_REG_LDOUSB,
796 pdata->ldousb, features);
797 else
798 child = add_regulator(TWL6030_REG_VUSB,
799 pdata->vusb, features);
800
801 if (IS_ERR(child))
802 return PTR_ERR(child);
803 }
804
805 if (twl_has_watchdog() && twl_class_is_4030()) {
806 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
807 if (IS_ERR(child))
808 return PTR_ERR(child);
809 }
810
811 if (twl_has_pwrbutton() && twl_class_is_4030()) {
812 child = add_child(1, "twl4030_pwrbutton",
813 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
814 if (IS_ERR(child))
815 return PTR_ERR(child);
816 }
817
818 if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
819 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
820 child = add_child(sub_chip_id, "twl4030-audio",
821 pdata->audio, sizeof(*pdata->audio),
822 false, 0, 0);
823 if (IS_ERR(child))
824 return PTR_ERR(child);
825 }
826
827 if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
828 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
829 child = add_child(sub_chip_id, "twl6040",
830 pdata->audio, sizeof(*pdata->audio),
831 false, 0, 0);
832 if (IS_ERR(child))
833 return PTR_ERR(child);
834 }
835
836 /* twl4030 regulators */
837 if (twl_has_regulator() && twl_class_is_4030()) {
838 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
839 features);
840 if (IS_ERR(child))
841 return PTR_ERR(child);
842
843 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
844 features);
845 if (IS_ERR(child))
846 return PTR_ERR(child);
847
848 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
849 features);
850 if (IS_ERR(child))
851 return PTR_ERR(child);
852
853 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
854 features);
855 if (IS_ERR(child))
856 return PTR_ERR(child);
857
858 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
859 features);
860 if (IS_ERR(child))
861 return PTR_ERR(child);
862
863 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
864 features);
865 if (IS_ERR(child))
866 return PTR_ERR(child);
867
868 child = add_regulator((features & TWL4030_VAUX2)
869 ? TWL4030_REG_VAUX2_4030
870 : TWL4030_REG_VAUX2,
871 pdata->vaux2, features);
872 if (IS_ERR(child))
873 return PTR_ERR(child);
874
875 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
876 features);
877 if (IS_ERR(child))
878 return PTR_ERR(child);
879
880 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
881 features);
882 if (IS_ERR(child))
883 return PTR_ERR(child);
884
885 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
886 features);
887 if (IS_ERR(child))
888 return PTR_ERR(child);
889 }
890
891 /* maybe add LDOs that are omitted on cost-reduced parts */
892 if (twl_has_regulator() && !(features & TPS_SUBSET)
893 && twl_class_is_4030()) {
894 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
895 features);
896 if (IS_ERR(child))
897 return PTR_ERR(child);
898
899 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
900 features);
901 if (IS_ERR(child))
902 return PTR_ERR(child);
903
904 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
905 features);
906 if (IS_ERR(child))
907 return PTR_ERR(child);
908
909 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
910 features);
911 if (IS_ERR(child))
912 return PTR_ERR(child);
913
914 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
915 features);
916 if (IS_ERR(child))
917 return PTR_ERR(child);
918
919 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
920 features);
921 if (IS_ERR(child))
922 return PTR_ERR(child);
923 }
924
925 /* twl6030 regulators */
926 if (twl_has_regulator() && twl_class_is_6030() &&
927 !(features & TWL6025_SUBCLASS)) {
928 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
929 features);
930 if (IS_ERR(child))
931 return PTR_ERR(child);
932
933 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
934 features);
935 if (IS_ERR(child))
936 return PTR_ERR(child);
937
938 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
939 features);
940 if (IS_ERR(child))
941 return PTR_ERR(child);
942
943 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
944 features);
945 if (IS_ERR(child))
946 return PTR_ERR(child);
947
948 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
949 features);
950 if (IS_ERR(child))
951 return PTR_ERR(child);
952
953 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
954 features);
955 if (IS_ERR(child))
956 return PTR_ERR(child);
957
958 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
959 features);
960 if (IS_ERR(child))
961 return PTR_ERR(child);
962
963 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
964 features);
965 if (IS_ERR(child))
966 return PTR_ERR(child);
967
968 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
969 features);
970 if (IS_ERR(child))
971 return PTR_ERR(child);
972 }
973
974 /* 6030 and 6025 share this regulator */
975 if (twl_has_regulator() && twl_class_is_6030()) {
976 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
977 features);
978 if (IS_ERR(child))
979 return PTR_ERR(child);
980 }
981
982 /* twl6025 regulators */
983 if (twl_has_regulator() && twl_class_is_6030() &&
984 (features & TWL6025_SUBCLASS)) {
985 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
986 features);
987 if (IS_ERR(child))
988 return PTR_ERR(child);
989
990 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
991 features);
992 if (IS_ERR(child))
993 return PTR_ERR(child);
994
995 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
996 features);
997 if (IS_ERR(child))
998 return PTR_ERR(child);
999
1000 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1001 features);
1002 if (IS_ERR(child))
1003 return PTR_ERR(child);
1004
1005 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1006 features);
1007 if (IS_ERR(child))
1008 return PTR_ERR(child);
1009
1010 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1011 features);
1012 if (IS_ERR(child))
1013 return PTR_ERR(child);
1014
1015 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1016 features);
1017 if (IS_ERR(child))
1018 return PTR_ERR(child);
1019
1020 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1021 features);
1022 if (IS_ERR(child))
1023 return PTR_ERR(child);
1024
1025 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1026 features);
1027 if (IS_ERR(child))
1028 return PTR_ERR(child);
1029
1030 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1031 features);
1032 if (IS_ERR(child))
1033 return PTR_ERR(child);
1034
1035 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1036 features);
1037 if (IS_ERR(child))
1038 return PTR_ERR(child);
1039
1040 }
1041
1042 if (twl_has_bci() && pdata->bci &&
1043 !(features & (TPS_SUBSET | TWL5031))) {
1044 child = add_child(3, "twl4030_bci",
1045 pdata->bci, sizeof(*pdata->bci), false,
1046 /* irq0 = CHG_PRES, irq1 = BCI */
1047 pdata->irq_base + BCI_PRES_INTR_OFFSET,
1048 pdata->irq_base + BCI_INTR_OFFSET);
1049 if (IS_ERR(child))
1050 return PTR_ERR(child);
1051 }
1052
1053 return 0;
1054}
1055
1056/*----------------------------------------------------------------------*/
1057
1058/*
1059 * These three functions initialize the on-chip clock framework,
1060 * letting it generate the right frequencies for USB, MADC, and
1061 * other purposes.
1062 */
1063static inline int __init protect_pm_master(void)
1064{
1065 int e = 0;
1066
1067 e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1068 TWL4030_PM_MASTER_PROTECT_KEY);
1069 return e;
1070}
1071
1072static inline int __init unprotect_pm_master(void)
1073{
1074 int e = 0;
1075
1076 e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1077 TWL4030_PM_MASTER_KEY_CFG1,
1078 TWL4030_PM_MASTER_PROTECT_KEY);
1079 e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1080 TWL4030_PM_MASTER_KEY_CFG2,
1081 TWL4030_PM_MASTER_PROTECT_KEY);
1082
1083 return e;
1084}
1085
1086static void clocks_init(struct device *dev,
1087 struct twl4030_clock_init_data *clock)
1088{
1089 int e = 0;
1090 struct clk *osc;
1091 u32 rate;
1092 u8 ctrl = HFCLK_FREQ_26_MHZ;
1093
1094#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1095 if (cpu_is_omap2430())
1096 osc = clk_get(dev, "osc_ck");
1097 else
1098 osc = clk_get(dev, "osc_sys_ck");
1099
1100 if (IS_ERR(osc)) {
1101 printk(KERN_WARNING "Skipping twl internal clock init and "
1102 "using bootloader value (unknown osc rate)\n");
1103 return;
1104 }
1105
1106 rate = clk_get_rate(osc);
1107 clk_put(osc);
1108
1109#else
1110 /* REVISIT for non-OMAP systems, pass the clock rate from
1111 * board init code, using platform_data.
1112 */
1113 osc = ERR_PTR(-EIO);
1114
1115 printk(KERN_WARNING "Skipping twl internal clock init and "
1116 "using bootloader value (unknown osc rate)\n");
1117
1118 return;
1119#endif
1120
1121 switch (rate) {
1122 case 19200000:
1123 ctrl = HFCLK_FREQ_19p2_MHZ;
1124 break;
1125 case 26000000:
1126 ctrl = HFCLK_FREQ_26_MHZ;
1127 break;
1128 case 38400000:
1129 ctrl = HFCLK_FREQ_38p4_MHZ;
1130 break;
1131 }
1132
1133 ctrl |= HIGH_PERF_SQ;
1134 if (clock && clock->ck32k_lowpwr_enable)
1135 ctrl |= CK32K_LOWPWR_EN;
1136
1137 e |= unprotect_pm_master();
1138 /* effect->MADC+USB ck en */
1139 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1140 e |= protect_pm_master();
1141
1142 if (e < 0)
1143 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1144}
1145
1146/*----------------------------------------------------------------------*/
1147
1148int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1149int twl4030_exit_irq(void);
1150int twl4030_init_chip_irq(const char *chip);
1151int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1152int twl6030_exit_irq(void);
1153
1154static int twl_remove(struct i2c_client *client)
1155{
1156 unsigned i;
1157 int status;
1158
1159 if (twl_class_is_4030())
1160 status = twl4030_exit_irq();
1161 else
1162 status = twl6030_exit_irq();
1163
1164 if (status < 0)
1165 return status;
1166
1167 for (i = 0; i < TWL_NUM_SLAVES; i++) {
1168 struct twl_client *twl = &twl_modules[i];
1169
1170 if (twl->client && twl->client != client)
1171 i2c_unregister_device(twl->client);
1172 twl_modules[i].client = NULL;
1173 }
1174 inuse = false;
1175 return 0;
1176}
1177
1178/* NOTE: this driver only handles a single twl4030/tps659x0 chip */
1179static int __devinit
1180twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1181{
1182 int status;
1183 unsigned i;
1184 struct twl4030_platform_data *pdata = client->dev.platform_data;
1185 u8 temp;
1186 int ret = 0;
1187
1188 if (!pdata) {
1189 dev_dbg(&client->dev, "no platform data?\n");
1190 return -EINVAL;
1191 }
1192
1193 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1194 dev_dbg(&client->dev, "can't talk I2C?\n");
1195 return -EIO;
1196 }
1197
1198 if (inuse) {
1199 dev_dbg(&client->dev, "driver is already in use\n");
1200 return -EBUSY;
1201 }
1202
1203 for (i = 0; i < TWL_NUM_SLAVES; i++) {
1204 struct twl_client *twl = &twl_modules[i];
1205
1206 twl->address = client->addr + i;
1207 if (i == 0)
1208 twl->client = client;
1209 else {
1210 twl->client = i2c_new_dummy(client->adapter,
1211 twl->address);
1212 if (!twl->client) {
1213 dev_err(&client->dev,
1214 "can't attach client %d\n", i);
1215 status = -ENOMEM;
1216 goto fail;
1217 }
1218 }
1219 mutex_init(&twl->xfer_lock);
1220 }
1221 inuse = true;
1222 if ((id->driver_data) & TWL6030_CLASS) {
1223 twl_id = TWL6030_CLASS_ID;
1224 twl_map = &twl6030_map[0];
1225 } else {
1226 twl_id = TWL4030_CLASS_ID;
1227 twl_map = &twl4030_map[0];
1228 }
1229
1230 /* setup clock framework */
1231 clocks_init(&client->dev, pdata->clock);
1232
1233 /* read TWL IDCODE Register */
1234 if (twl_id == TWL4030_CLASS_ID) {
1235 ret = twl_read_idcode_register();
1236 WARN(ret < 0, "Error: reading twl_idcode register value\n");
1237 }
1238
1239 /* load power event scripts */
1240 if (twl_has_power() && pdata->power)
1241 twl4030_power_init(pdata->power);
1242
1243 /* Maybe init the T2 Interrupt subsystem */
1244 if (client->irq
1245 && pdata->irq_base
1246 && pdata->irq_end > pdata->irq_base) {
1247 if (twl_class_is_4030()) {
1248 twl4030_init_chip_irq(id->name);
1249 status = twl4030_init_irq(client->irq, pdata->irq_base,
1250 pdata->irq_end);
1251 } else {
1252 status = twl6030_init_irq(client->irq, pdata->irq_base,
1253 pdata->irq_end);
1254 }
1255
1256 if (status < 0)
1257 goto fail;
1258 }
1259
1260 /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1261 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1262 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1263 */
1264
1265 if (twl_class_is_4030()) {
1266 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1267 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1268 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1269 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1270 }
1271
1272 status = add_children(pdata, id->driver_data);
1273fail:
1274 if (status < 0)
1275 twl_remove(client);
1276 return status;
1277}
1278
1279static const struct i2c_device_id twl_ids[] = {
1280 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
1281 { "twl5030", 0 }, /* T2 updated */
1282 { "twl5031", TWL5031 }, /* TWL5030 updated */
1283 { "tps65950", 0 }, /* catalog version of twl5030 */
1284 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
1285 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
1286 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED
1287 and vibrator. Charger in USB module*/
1288 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
1289 { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1290 { /* end of list */ },
1291};
1292MODULE_DEVICE_TABLE(i2c, twl_ids);
1293
1294/* One Client Driver , 4 Clients */
1295static struct i2c_driver twl_driver = {
1296 .driver.name = DRIVER_NAME,
1297 .id_table = twl_ids,
1298 .probe = twl_probe,
1299 .remove = twl_remove,
1300};
1301
1302static int __init twl_init(void)
1303{
1304 return i2c_add_driver(&twl_driver);
1305}
1306subsys_initcall(twl_init);
1307
1308static void __exit twl_exit(void)
1309{
1310 i2c_del_driver(&twl_driver);
1311}
1312module_exit(twl_exit);
1313
1314MODULE_AUTHOR("Texas Instruments, Inc.");
1315MODULE_DESCRIPTION("I2C Core interface for TWL");
1316MODULE_LICENSE("GPL");
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 */
152struct twl_client {
153 struct i2c_client *client;
154 struct regmap *regmap;
155};
156
157/* mapping the module id to slave id and base address */
158struct twl_mapping {
159 unsigned char sid; /* Slave ID */
160 unsigned char base; /* base address */
161};
162
163struct 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
172static struct twl_private *twl_priv;
173
174static 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
210static 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
286static 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
300static const struct regmap_range twl4030_49_volatile_ranges[] = {
301 regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
302};
303
304static 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
309static 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
345static 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
372static 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
395static 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
403static 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
413unsigned int twl_rev(void)
414{
415 return twl_priv ? twl_priv->twl_id : 0;
416}
417EXPORT_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 */
425static 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 */
454int 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}
471EXPORT_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 */
482int 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}
499EXPORT_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 */
509int 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}
520EXPORT_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 */
529static 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);
550fail:
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 */
559int twl_get_type(void)
560{
561 return TWL_SIL_TYPE(twl_priv->twl_idcode);
562}
563EXPORT_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 */
570int twl_get_version(void)
571{
572 return TWL_SIL_REV(twl_priv->twl_idcode);
573}
574EXPORT_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 */
581int 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}
606EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
607
608static struct device *
609add_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 dev_dbg(&twl->client->dev, "can't alloc dev\n");
627 status = -ENOMEM;
628 goto err;
629 }
630
631 pdev->dev.parent = &twl->client->dev;
632
633 if (pdata) {
634 status = platform_device_add_data(pdev, pdata, pdata_len);
635 if (status < 0) {
636 dev_dbg(&pdev->dev, "can't add platform_data\n");
637 goto err;
638 }
639 }
640
641 if (irq0) {
642 struct resource r[2] = {
643 { .start = irq0, .flags = IORESOURCE_IRQ, },
644 { .start = irq1, .flags = IORESOURCE_IRQ, },
645 };
646
647 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
648 if (status < 0) {
649 dev_dbg(&pdev->dev, "can't add irqs\n");
650 goto err;
651 }
652 }
653
654 status = platform_device_add(pdev);
655 if (status == 0)
656 device_init_wakeup(&pdev->dev, can_wakeup);
657
658err:
659 if (status < 0) {
660 platform_device_put(pdev);
661 dev_err(&twl->client->dev, "can't add %s dev\n", name);
662 return ERR_PTR(status);
663 }
664 return &pdev->dev;
665}
666
667static inline struct device *add_child(unsigned mod_no, const char *name,
668 void *pdata, unsigned pdata_len,
669 bool can_wakeup, int irq0, int irq1)
670{
671 return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
672 can_wakeup, irq0, irq1);
673}
674
675static struct device *
676add_regulator_linked(int num, struct regulator_init_data *pdata,
677 struct regulator_consumer_supply *consumers,
678 unsigned num_consumers, unsigned long features)
679{
680 struct twl_regulator_driver_data drv_data;
681
682 /* regulator framework demands init_data ... */
683 if (!pdata)
684 return NULL;
685
686 if (consumers) {
687 pdata->consumer_supplies = consumers;
688 pdata->num_consumer_supplies = num_consumers;
689 }
690
691 if (pdata->driver_data) {
692 /* If we have existing drv_data, just add the flags */
693 struct twl_regulator_driver_data *tmp;
694 tmp = pdata->driver_data;
695 tmp->features |= features;
696 } else {
697 /* add new driver data struct, used only during init */
698 drv_data.features = features;
699 drv_data.set_voltage = NULL;
700 drv_data.get_voltage = NULL;
701 drv_data.data = NULL;
702 pdata->driver_data = &drv_data;
703 }
704
705 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
706 return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
707 pdata, sizeof(*pdata), false, 0, 0);
708}
709
710static struct device *
711add_regulator(int num, struct regulator_init_data *pdata,
712 unsigned long features)
713{
714 return add_regulator_linked(num, pdata, NULL, 0, features);
715}
716
717/*
718 * NOTE: We know the first 8 IRQs after pdata->base_irq are
719 * for the PIH, and the next are for the PWR_INT SIH, since
720 * that's how twl_init_irq() sets things up.
721 */
722
723static int
724add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
725 unsigned long features)
726{
727 struct device *child;
728
729 if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
730 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
731 pdata->gpio, sizeof(*pdata->gpio),
732 false, irq_base + GPIO_INTR_OFFSET, 0);
733 if (IS_ERR(child))
734 return PTR_ERR(child);
735 }
736
737 if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
738 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
739 pdata->keypad, sizeof(*pdata->keypad),
740 true, irq_base + KEYPAD_INTR_OFFSET, 0);
741 if (IS_ERR(child))
742 return PTR_ERR(child);
743 }
744
745 if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
746 twl_class_is_4030()) {
747 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
748 pdata->madc, sizeof(*pdata->madc),
749 true, irq_base + MADC_INTR_OFFSET, 0);
750 if (IS_ERR(child))
751 return PTR_ERR(child);
752 }
753
754 if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
755 /*
756 * REVISIT platform_data here currently might expose the
757 * "msecure" line ... but for now we just expect board
758 * setup to tell the chip "it's always ok to SET_TIME".
759 * Eventually, Linux might become more aware of such
760 * HW security concerns, and "least privilege".
761 */
762 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
763 true, irq_base + RTC_INTR_OFFSET, 0);
764 if (IS_ERR(child))
765 return PTR_ERR(child);
766 }
767
768 if (IS_ENABLED(CONFIG_PWM_TWL)) {
769 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
770 false, 0, 0);
771 if (IS_ERR(child))
772 return PTR_ERR(child);
773 }
774
775 if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
776 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
777 false, 0, 0);
778 if (IS_ERR(child))
779 return PTR_ERR(child);
780 }
781
782 if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
783 twl_class_is_4030()) {
784
785 static struct regulator_consumer_supply usb1v5 = {
786 .supply = "usb1v5",
787 };
788 static struct regulator_consumer_supply usb1v8 = {
789 .supply = "usb1v8",
790 };
791 static struct regulator_consumer_supply usb3v1 = {
792 .supply = "usb3v1",
793 };
794
795 /* First add the regulators so that they can be used by transceiver */
796 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
797 /* this is a template that gets copied */
798 struct regulator_init_data usb_fixed = {
799 .constraints.valid_modes_mask =
800 REGULATOR_MODE_NORMAL
801 | REGULATOR_MODE_STANDBY,
802 .constraints.valid_ops_mask =
803 REGULATOR_CHANGE_MODE
804 | REGULATOR_CHANGE_STATUS,
805 };
806
807 child = add_regulator_linked(TWL4030_REG_VUSB1V5,
808 &usb_fixed, &usb1v5, 1,
809 features);
810 if (IS_ERR(child))
811 return PTR_ERR(child);
812
813 child = add_regulator_linked(TWL4030_REG_VUSB1V8,
814 &usb_fixed, &usb1v8, 1,
815 features);
816 if (IS_ERR(child))
817 return PTR_ERR(child);
818
819 child = add_regulator_linked(TWL4030_REG_VUSB3V1,
820 &usb_fixed, &usb3v1, 1,
821 features);
822 if (IS_ERR(child))
823 return PTR_ERR(child);
824
825 }
826
827 child = add_child(TWL_MODULE_USB, "twl4030_usb",
828 pdata->usb, sizeof(*pdata->usb), true,
829 /* irq0 = USB_PRES, irq1 = USB */
830 irq_base + USB_PRES_INTR_OFFSET,
831 irq_base + USB_INTR_OFFSET);
832
833 if (IS_ERR(child))
834 return PTR_ERR(child);
835
836 /* we need to connect regulators to this transceiver */
837 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
838 usb1v5.dev_name = dev_name(child);
839 usb1v8.dev_name = dev_name(child);
840 usb3v1.dev_name = dev_name(child);
841 }
842 }
843
844 if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
845 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
846 0, false, 0, 0);
847 if (IS_ERR(child))
848 return PTR_ERR(child);
849 }
850
851 if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
852 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
853 NULL, 0, true, irq_base + 8 + 0, 0);
854 if (IS_ERR(child))
855 return PTR_ERR(child);
856 }
857
858 if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
859 twl_class_is_4030()) {
860 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
861 pdata->audio, sizeof(*pdata->audio),
862 false, 0, 0);
863 if (IS_ERR(child))
864 return PTR_ERR(child);
865 }
866
867 /* twl4030 regulators */
868 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
869 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
870 features);
871 if (IS_ERR(child))
872 return PTR_ERR(child);
873
874 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
875 features);
876 if (IS_ERR(child))
877 return PTR_ERR(child);
878
879 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
880 features);
881 if (IS_ERR(child))
882 return PTR_ERR(child);
883
884 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
885 features);
886 if (IS_ERR(child))
887 return PTR_ERR(child);
888
889 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
890 features);
891 if (IS_ERR(child))
892 return PTR_ERR(child);
893
894 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
895 features);
896 if (IS_ERR(child))
897 return PTR_ERR(child);
898
899 child = add_regulator((features & TWL4030_VAUX2)
900 ? TWL4030_REG_VAUX2_4030
901 : TWL4030_REG_VAUX2,
902 pdata->vaux2, features);
903 if (IS_ERR(child))
904 return PTR_ERR(child);
905
906 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
907 features);
908 if (IS_ERR(child))
909 return PTR_ERR(child);
910
911 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
912 features);
913 if (IS_ERR(child))
914 return PTR_ERR(child);
915
916 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
917 features);
918 if (IS_ERR(child))
919 return PTR_ERR(child);
920 }
921
922 /* maybe add LDOs that are omitted on cost-reduced parts */
923 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
924 && twl_class_is_4030()) {
925 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
926 features);
927 if (IS_ERR(child))
928 return PTR_ERR(child);
929
930 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
931 features);
932 if (IS_ERR(child))
933 return PTR_ERR(child);
934
935 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
936 features);
937 if (IS_ERR(child))
938 return PTR_ERR(child);
939
940 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
941 features);
942 if (IS_ERR(child))
943 return PTR_ERR(child);
944
945 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
946 features);
947 if (IS_ERR(child))
948 return PTR_ERR(child);
949
950 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
951 features);
952 if (IS_ERR(child))
953 return PTR_ERR(child);
954 }
955
956 if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
957 !(features & (TPS_SUBSET | TWL5031))) {
958 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
959 pdata->bci, sizeof(*pdata->bci), false,
960 /* irq0 = CHG_PRES, irq1 = BCI */
961 irq_base + BCI_PRES_INTR_OFFSET,
962 irq_base + BCI_INTR_OFFSET);
963 if (IS_ERR(child))
964 return PTR_ERR(child);
965 }
966
967 if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) {
968 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power",
969 pdata->power, sizeof(*pdata->power), false,
970 0, 0);
971 if (IS_ERR(child))
972 return PTR_ERR(child);
973 }
974
975 return 0;
976}
977
978/*----------------------------------------------------------------------*/
979
980/*
981 * These three functions initialize the on-chip clock framework,
982 * letting it generate the right frequencies for USB, MADC, and
983 * other purposes.
984 */
985static inline int __init protect_pm_master(void)
986{
987 int e = 0;
988
989 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
990 TWL4030_PM_MASTER_PROTECT_KEY);
991 return e;
992}
993
994static inline int __init unprotect_pm_master(void)
995{
996 int e = 0;
997
998 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
999 TWL4030_PM_MASTER_PROTECT_KEY);
1000 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
1001 TWL4030_PM_MASTER_PROTECT_KEY);
1002
1003 return e;
1004}
1005
1006static void clocks_init(struct device *dev,
1007 struct twl4030_clock_init_data *clock)
1008{
1009 int e = 0;
1010 struct clk *osc;
1011 u32 rate;
1012 u8 ctrl = HFCLK_FREQ_26_MHZ;
1013
1014 osc = clk_get(dev, "fck");
1015 if (IS_ERR(osc)) {
1016 printk(KERN_WARNING "Skipping twl internal clock init and "
1017 "using bootloader value (unknown osc rate)\n");
1018 return;
1019 }
1020
1021 rate = clk_get_rate(osc);
1022 clk_put(osc);
1023
1024 switch (rate) {
1025 case 19200000:
1026 ctrl = HFCLK_FREQ_19p2_MHZ;
1027 break;
1028 case 26000000:
1029 ctrl = HFCLK_FREQ_26_MHZ;
1030 break;
1031 case 38400000:
1032 ctrl = HFCLK_FREQ_38p4_MHZ;
1033 break;
1034 }
1035
1036 ctrl |= HIGH_PERF_SQ;
1037 if (clock && clock->ck32k_lowpwr_enable)
1038 ctrl |= CK32K_LOWPWR_EN;
1039
1040 e |= unprotect_pm_master();
1041 /* effect->MADC+USB ck en */
1042 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1043 e |= protect_pm_master();
1044
1045 if (e < 0)
1046 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1047}
1048
1049/*----------------------------------------------------------------------*/
1050
1051
1052static int twl_remove(struct i2c_client *client)
1053{
1054 unsigned i, num_slaves;
1055 int status;
1056
1057 if (twl_class_is_4030())
1058 status = twl4030_exit_irq();
1059 else
1060 status = twl6030_exit_irq();
1061
1062 if (status < 0)
1063 return status;
1064
1065 num_slaves = twl_get_num_slaves();
1066 for (i = 0; i < num_slaves; i++) {
1067 struct twl_client *twl = &twl_priv->twl_modules[i];
1068
1069 if (twl->client && twl->client != client)
1070 i2c_unregister_device(twl->client);
1071 twl->client = NULL;
1072 }
1073 twl_priv->ready = false;
1074 return 0;
1075}
1076
1077static struct of_dev_auxdata twl_auxdata_lookup[] = {
1078 OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
1079 { /* sentinel */ },
1080};
1081
1082/* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1083static int
1084twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1085{
1086 struct twl4030_platform_data *pdata = dev_get_platdata(&client->dev);
1087 struct device_node *node = client->dev.of_node;
1088 struct platform_device *pdev;
1089 const struct regmap_config *twl_regmap_config;
1090 int irq_base = 0;
1091 int status;
1092 unsigned i, num_slaves;
1093
1094 if (!node && !pdata) {
1095 dev_err(&client->dev, "no platform data\n");
1096 return -EINVAL;
1097 }
1098
1099 if (twl_priv) {
1100 dev_dbg(&client->dev, "only one instance of %s allowed\n",
1101 DRIVER_NAME);
1102 return -EBUSY;
1103 }
1104
1105 pdev = platform_device_alloc(DRIVER_NAME, -1);
1106 if (!pdev) {
1107 dev_err(&client->dev, "can't alloc pdev\n");
1108 return -ENOMEM;
1109 }
1110
1111 status = platform_device_add(pdev);
1112 if (status) {
1113 platform_device_put(pdev);
1114 return status;
1115 }
1116
1117 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1118 dev_dbg(&client->dev, "can't talk I2C?\n");
1119 status = -EIO;
1120 goto free;
1121 }
1122
1123 twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
1124 GFP_KERNEL);
1125 if (!twl_priv) {
1126 status = -ENOMEM;
1127 goto free;
1128 }
1129
1130 if ((id->driver_data) & TWL6030_CLASS) {
1131 twl_priv->twl_id = TWL6030_CLASS_ID;
1132 twl_priv->twl_map = &twl6030_map[0];
1133 /* The charger base address is different in twl6032 */
1134 if ((id->driver_data) & TWL6032_SUBCLASS)
1135 twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base =
1136 TWL6032_BASEADD_CHARGER;
1137 twl_regmap_config = twl6030_regmap_config;
1138 } else {
1139 twl_priv->twl_id = TWL4030_CLASS_ID;
1140 twl_priv->twl_map = &twl4030_map[0];
1141 twl_regmap_config = twl4030_regmap_config;
1142 }
1143
1144 num_slaves = twl_get_num_slaves();
1145 twl_priv->twl_modules = devm_kzalloc(&client->dev,
1146 sizeof(struct twl_client) * num_slaves,
1147 GFP_KERNEL);
1148 if (!twl_priv->twl_modules) {
1149 status = -ENOMEM;
1150 goto free;
1151 }
1152
1153 for (i = 0; i < num_slaves; i++) {
1154 struct twl_client *twl = &twl_priv->twl_modules[i];
1155
1156 if (i == 0) {
1157 twl->client = client;
1158 } else {
1159 twl->client = i2c_new_dummy(client->adapter,
1160 client->addr + i);
1161 if (!twl->client) {
1162 dev_err(&client->dev,
1163 "can't attach client %d\n", i);
1164 status = -ENOMEM;
1165 goto fail;
1166 }
1167 }
1168
1169 twl->regmap = devm_regmap_init_i2c(twl->client,
1170 &twl_regmap_config[i]);
1171 if (IS_ERR(twl->regmap)) {
1172 status = PTR_ERR(twl->regmap);
1173 dev_err(&client->dev,
1174 "Failed to allocate regmap %d, err: %d\n", i,
1175 status);
1176 goto fail;
1177 }
1178 }
1179
1180 twl_priv->ready = true;
1181
1182 /* setup clock framework */
1183 clocks_init(&pdev->dev, pdata ? pdata->clock : NULL);
1184
1185 /* read TWL IDCODE Register */
1186 if (twl_class_is_4030()) {
1187 status = twl_read_idcode_register();
1188 WARN(status < 0, "Error: reading twl_idcode register value\n");
1189 }
1190
1191 /* Maybe init the T2 Interrupt subsystem */
1192 if (client->irq) {
1193 if (twl_class_is_4030()) {
1194 twl4030_init_chip_irq(id->name);
1195 irq_base = twl4030_init_irq(&client->dev, client->irq);
1196 } else {
1197 irq_base = twl6030_init_irq(&client->dev, client->irq);
1198 }
1199
1200 if (irq_base < 0) {
1201 status = irq_base;
1202 goto fail;
1203 }
1204 }
1205
1206 /*
1207 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1208 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1209 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1210 *
1211 * Also, always enable SmartReflex bit as that's needed for omaps to
1212 * to do anything over I2C4 for voltage scaling even if SmartReflex
1213 * is disabled. Without the SmartReflex bit omap sys_clkreq idle
1214 * signal will never trigger for retention idle.
1215 */
1216 if (twl_class_is_4030()) {
1217 u8 temp;
1218
1219 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1220 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1221 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1222 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1223
1224 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
1225 TWL4030_DCDC_GLOBAL_CFG);
1226 temp |= SMARTREFLEX_ENABLE;
1227 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
1228 TWL4030_DCDC_GLOBAL_CFG);
1229 }
1230
1231 if (node) {
1232 if (pdata)
1233 twl_auxdata_lookup[0].platform_data = pdata->gpio;
1234 status = of_platform_populate(node, NULL, twl_auxdata_lookup,
1235 &client->dev);
1236 } else {
1237 status = add_children(pdata, irq_base, id->driver_data);
1238 }
1239
1240fail:
1241 if (status < 0)
1242 twl_remove(client);
1243free:
1244 if (status < 0)
1245 platform_device_unregister(pdev);
1246
1247 return status;
1248}
1249
1250static const struct i2c_device_id twl_ids[] = {
1251 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
1252 { "twl5030", 0 }, /* T2 updated */
1253 { "twl5031", TWL5031 }, /* TWL5030 updated */
1254 { "tps65950", 0 }, /* catalog version of twl5030 */
1255 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
1256 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
1257 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED
1258 and vibrator. Charger in USB module*/
1259 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
1260 { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
1261 { /* end of list */ },
1262};
1263MODULE_DEVICE_TABLE(i2c, twl_ids);
1264
1265/* One Client Driver , 4 Clients */
1266static struct i2c_driver twl_driver = {
1267 .driver.name = DRIVER_NAME,
1268 .id_table = twl_ids,
1269 .probe = twl_probe,
1270 .remove = twl_remove,
1271};
1272
1273module_i2c_driver(twl_driver);
1274
1275MODULE_AUTHOR("Texas Instruments, Inc.");
1276MODULE_DESCRIPTION("I2C Core interface for TWL");
1277MODULE_LICENSE("GPL");