mfd: Fix twl-core oops while calling twl_i2c_* for unbound driver
[linux-2.6.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/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_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_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? */
231 static bool inuse;
232
233 /* TWL IDCODE Register value */
234 static u32 twl_idcode;
235
236 static unsigned int twl_id;
237 unsigned int twl_rev(void)
238 {
239         return twl_id;
240 }
241 EXPORT_SYMBOL(twl_rev);
242
243 /* Structure for each TWL4030/TWL6030 Slave */
244 struct 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
255 static struct twl_client twl_modules[TWL_NUM_SLAVES];
256
257
258 /* mapping the module id to slave id and base address */
259 struct twl_mapping {
260         unsigned char sid;      /* Slave ID */
261         unsigned char base;     /* base address */
262 };
263 static struct twl_mapping *twl_map;
264
265 static 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
301 static 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  */
354 int 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         if (unlikely(!inuse)) {
366                 pr_err("%s: not initialized\n", DRIVER_NAME);
367                 return -EPERM;
368         }
369         sid = twl_map[mod_no].sid;
370         twl = &twl_modules[sid];
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 }
399 EXPORT_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  */
410 int 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         if (unlikely(!inuse)) {
423                 pr_err("%s: not initialized\n", DRIVER_NAME);
424                 return -EPERM;
425         }
426         sid = twl_map[mod_no].sid;
427         twl = &twl_modules[sid];
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 }
458 EXPORT_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  */
468 int 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 }
477 EXPORT_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  */
487 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
488 {
489         return twl_i2c_read(mod_no, value, reg, 1);
490 }
491 EXPORT_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  */
500 static 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);
521 fail:
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  */
530 int twl_get_type(void)
531 {
532         return TWL_SIL_TYPE(twl_idcode);
533 }
534 EXPORT_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  */
541 int twl_get_version(void)
542 {
543         return TWL_SIL_REV(twl_idcode);
544 }
545 EXPORT_SYMBOL_GPL(twl_get_version);
546
547 static struct device *
548 add_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
589 err:
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
598 static 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
606 static struct device *
607 add_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
629 static struct device *
630 add_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
642 static int
643 add_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  */
1063 static 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
1072 static 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
1086 static 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
1148 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1149 int twl4030_exit_irq(void);
1150 int twl4030_init_chip_irq(const char *chip);
1151 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1152 int twl6030_exit_irq(void);
1153
1154 static 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 */
1179 static int __devinit
1180 twl_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);
1273 fail:
1274         if (status < 0)
1275                 twl_remove(client);
1276         return status;
1277 }
1278
1279 static 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 };
1292 MODULE_DEVICE_TABLE(i2c, twl_ids);
1293
1294 /* One Client Driver , 4 Clients */
1295 static 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
1302 static int __init twl_init(void)
1303 {
1304         return i2c_add_driver(&twl_driver);
1305 }
1306 subsys_initcall(twl_init);
1307
1308 static void __exit twl_exit(void)
1309 {
1310         i2c_del_driver(&twl_driver);
1311 }
1312 module_exit(twl_exit);
1313
1314 MODULE_AUTHOR("Texas Instruments, Inc.");
1315 MODULE_DESCRIPTION("I2C Core interface for TWL");
1316 MODULE_LICENSE("GPL");