GNU Linux-libre 6.7.9-gnu
[releases.git] / drivers / mfd / twl-core.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
4  * and audio CODEC devices
5  *
6  * Copyright (C) 2005-2006 Texas Instruments, Inc.
7  *
8  * Modifications to defer interrupt handling to a kernel thread:
9  * Copyright (C) 2006 MontaVista Software, Inc.
10  *
11  * Based on tlv320aic23.c:
12  * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
13  *
14  * Code cleanup and modifications to IRQ handler.
15  * by syed khasim <x0khasim@ti.com>
16  */
17
18 #include <linux/init.h>
19 #include <linux/mutex.h>
20 #include <linux/platform_device.h>
21 #include <linux/regmap.h>
22 #include <linux/clk.h>
23 #include <linux/err.h>
24 #include <linux/device.h>
25 #include <linux/of.h>
26 #include <linux/of_irq.h>
27 #include <linux/of_platform.h>
28 #include <linux/irq.h>
29 #include <linux/irqdomain.h>
30
31 #include <linux/regulator/machine.h>
32
33 #include <linux/i2c.h>
34
35 #include <linux/mfd/core.h>
36 #include <linux/mfd/twl.h>
37
38 /* Register descriptions for audio */
39 #include <linux/mfd/twl4030-audio.h>
40
41 #include "twl-core.h"
42
43 /*
44  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
45  * Management and System Companion Device" chips originally designed for
46  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
47  * often at around 3 Mbit/sec, including for interrupt handling.
48  *
49  * This driver core provides genirq support for the interrupts emitted,
50  * by the various modules, and exports register access primitives.
51  *
52  * FIXME this driver currently requires use of the first interrupt line
53  * (and associated registers).
54  */
55
56 #define DRIVER_NAME                     "twl"
57
58 /* Triton Core internal information (BEGIN) */
59
60 /* Base Address defns for twl4030_map[] */
61
62 /* subchip/slave 0 - USB ID */
63 #define TWL4030_BASEADD_USB             0x0000
64
65 /* subchip/slave 1 - AUD ID */
66 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
67 #define TWL4030_BASEADD_GPIO            0x0098
68 #define TWL4030_BASEADD_INTBR           0x0085
69 #define TWL4030_BASEADD_PIH             0x0080
70 #define TWL4030_BASEADD_TEST            0x004C
71
72 /* subchip/slave 2 - AUX ID */
73 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
74 #define TWL4030_BASEADD_LED             0x00EE
75 #define TWL4030_BASEADD_MADC            0x0000
76 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
77 #define TWL4030_BASEADD_PRECHARGE       0x00AA
78 #define TWL4030_BASEADD_PWM             0x00F8
79 #define TWL4030_BASEADD_KEYPAD          0x00D2
80
81 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
82 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
83                                                   one */
84
85 /* subchip/slave 3 - POWER ID */
86 #define TWL4030_BASEADD_BACKUP          0x0014
87 #define TWL4030_BASEADD_INT             0x002E
88 #define TWL4030_BASEADD_PM_MASTER       0x0036
89
90 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
91 #define TWL4030_DCDC_GLOBAL_CFG         0x06
92 #define SMARTREFLEX_ENABLE              BIT(3)
93
94 #define TWL4030_BASEADD_RTC             0x001C
95 #define TWL4030_BASEADD_SECURED_REG     0x0000
96
97 /* Triton Core internal information (END) */
98
99
100 /* subchip/slave 0 0x48 - POWER */
101 #define TWL6030_BASEADD_RTC             0x0000
102 #define TWL6030_BASEADD_SECURED_REG     0x0017
103 #define TWL6030_BASEADD_PM_MASTER       0x001F
104 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
105 #define TWL6030_BASEADD_PM_MISC         0x00E2
106 #define TWL6030_BASEADD_PM_PUPD         0x00F0
107
108 /* subchip/slave 1 0x49 - FEATURE */
109 #define TWL6030_BASEADD_USB             0x0000
110 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
111 #define TWL6030_BASEADD_AUX             0x0090
112 #define TWL6030_BASEADD_PWM             0x00BA
113 #define TWL6030_BASEADD_GASGAUGE        0x00C0
114 #define TWL6030_BASEADD_PIH             0x00D0
115 #define TWL6032_BASEADD_CHARGER         0x00DA
116 #define TWL6030_BASEADD_CHARGER         0x00E0
117 #define TWL6030_BASEADD_LED             0x00F4
118
119 /* subchip/slave 2 0x4A - DFT */
120 #define TWL6030_BASEADD_DIEID           0x00C0
121
122 /* subchip/slave 3 0x4B - AUDIO */
123 #define TWL6030_BASEADD_AUDIO           0x0000
124 #define TWL6030_BASEADD_RSV             0x0000
125 #define TWL6030_BASEADD_ZERO            0x0000
126
127 /* Few power values */
128 #define R_CFG_BOOT                      0x05
129
130 /* some fields in R_CFG_BOOT */
131 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
132 #define HFCLK_FREQ_26_MHZ               (2 << 0)
133 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
134 #define HIGH_PERF_SQ                    (1 << 3)
135 #define CK32K_LOWPWR_EN                 (1 << 7)
136
137 /*----------------------------------------------------------------------*/
138
139 /* Structure for each TWL4030/TWL6030 Slave */
140 struct twl_client {
141         struct i2c_client *client;
142         struct regmap *regmap;
143 };
144
145 /* mapping the module id to slave id and base address */
146 struct twl_mapping {
147         unsigned char sid;      /* Slave ID */
148         unsigned char base;     /* base address */
149 };
150
151 struct twl_private {
152         bool ready; /* The core driver is ready to be used */
153         u32 twl_idcode; /* TWL IDCODE Register value */
154         unsigned int twl_id;
155
156         struct twl_mapping *twl_map;
157         struct twl_client *twl_modules;
158 };
159
160 static struct twl_private *twl_priv;
161
162 static struct twl_mapping twl4030_map[] = {
163         /*
164          * NOTE:  don't change this table without updating the
165          * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
166          * so they continue to match the order in this table.
167          */
168
169         /* Common IPs */
170         { 0, TWL4030_BASEADD_USB },
171         { 1, TWL4030_BASEADD_PIH },
172         { 2, TWL4030_BASEADD_MAIN_CHARGE },
173         { 3, TWL4030_BASEADD_PM_MASTER },
174         { 3, TWL4030_BASEADD_PM_RECEIVER },
175
176         { 3, TWL4030_BASEADD_RTC },
177         { 2, TWL4030_BASEADD_PWM },
178         { 2, TWL4030_BASEADD_LED },
179         { 3, TWL4030_BASEADD_SECURED_REG },
180
181         /* TWL4030 specific IPs */
182         { 1, TWL4030_BASEADD_AUDIO_VOICE },
183         { 1, TWL4030_BASEADD_GPIO },
184         { 1, TWL4030_BASEADD_INTBR },
185         { 1, TWL4030_BASEADD_TEST },
186         { 2, TWL4030_BASEADD_KEYPAD },
187
188         { 2, TWL4030_BASEADD_MADC },
189         { 2, TWL4030_BASEADD_INTERRUPTS },
190         { 2, TWL4030_BASEADD_PRECHARGE },
191         { 3, TWL4030_BASEADD_BACKUP },
192         { 3, TWL4030_BASEADD_INT },
193
194         { 2, TWL5031_BASEADD_ACCESSORY },
195         { 2, TWL5031_BASEADD_INTERRUPTS },
196 };
197
198 static const struct reg_default twl4030_49_defaults[] = {
199         /* Audio Registers */
200         { 0x01, 0x00}, /* CODEC_MODE    */
201         { 0x02, 0x00}, /* OPTION        */
202         /* 0x03  Unused */
203         { 0x04, 0x00}, /* MICBIAS_CTL   */
204         { 0x05, 0x00}, /* ANAMICL       */
205         { 0x06, 0x00}, /* ANAMICR       */
206         { 0x07, 0x00}, /* AVADC_CTL     */
207         { 0x08, 0x00}, /* ADCMICSEL     */
208         { 0x09, 0x00}, /* DIGMIXING     */
209         { 0x0a, 0x0f}, /* ATXL1PGA      */
210         { 0x0b, 0x0f}, /* ATXR1PGA      */
211         { 0x0c, 0x0f}, /* AVTXL2PGA     */
212         { 0x0d, 0x0f}, /* AVTXR2PGA     */
213         { 0x0e, 0x00}, /* AUDIO_IF      */
214         { 0x0f, 0x00}, /* VOICE_IF      */
215         { 0x10, 0x3f}, /* ARXR1PGA      */
216         { 0x11, 0x3f}, /* ARXL1PGA      */
217         { 0x12, 0x3f}, /* ARXR2PGA      */
218         { 0x13, 0x3f}, /* ARXL2PGA      */
219         { 0x14, 0x25}, /* VRXPGA        */
220         { 0x15, 0x00}, /* VSTPGA        */
221         { 0x16, 0x00}, /* VRX2ARXPGA    */
222         { 0x17, 0x00}, /* AVDAC_CTL     */
223         { 0x18, 0x00}, /* ARX2VTXPGA    */
224         { 0x19, 0x32}, /* ARXL1_APGA_CTL*/
225         { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
226         { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
227         { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
228         { 0x1d, 0x00}, /* ATX2ARXPGA    */
229         { 0x1e, 0x00}, /* BT_IF         */
230         { 0x1f, 0x55}, /* BTPGA         */
231         { 0x20, 0x00}, /* BTSTPGA       */
232         { 0x21, 0x00}, /* EAR_CTL       */
233         { 0x22, 0x00}, /* HS_SEL        */
234         { 0x23, 0x00}, /* HS_GAIN_SET   */
235         { 0x24, 0x00}, /* HS_POPN_SET   */
236         { 0x25, 0x00}, /* PREDL_CTL     */
237         { 0x26, 0x00}, /* PREDR_CTL     */
238         { 0x27, 0x00}, /* PRECKL_CTL    */
239         { 0x28, 0x00}, /* PRECKR_CTL    */
240         { 0x29, 0x00}, /* HFL_CTL       */
241         { 0x2a, 0x00}, /* HFR_CTL       */
242         { 0x2b, 0x05}, /* ALC_CTL       */
243         { 0x2c, 0x00}, /* ALC_SET1      */
244         { 0x2d, 0x00}, /* ALC_SET2      */
245         { 0x2e, 0x00}, /* BOOST_CTL     */
246         { 0x2f, 0x00}, /* SOFTVOL_CTL   */
247         { 0x30, 0x13}, /* DTMF_FREQSEL  */
248         { 0x31, 0x00}, /* DTMF_TONEXT1H */
249         { 0x32, 0x00}, /* DTMF_TONEXT1L */
250         { 0x33, 0x00}, /* DTMF_TONEXT2H */
251         { 0x34, 0x00}, /* DTMF_TONEXT2L */
252         { 0x35, 0x79}, /* DTMF_TONOFF   */
253         { 0x36, 0x11}, /* DTMF_WANONOFF */
254         { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
255         { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
256         { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
257         { 0x3a, 0x06}, /* APLL_CTL */
258         { 0x3b, 0x00}, /* DTMF_CTL */
259         { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
260         { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
261         { 0x3e, 0x00}, /* MISC_SET_1 */
262         { 0x3f, 0x00}, /* PCMBTMUX */
263         /* 0x40 - 0x42  Unused */
264         { 0x43, 0x00}, /* RX_PATH_SEL */
265         { 0x44, 0x32}, /* VDL_APGA_CTL */
266         { 0x45, 0x00}, /* VIBRA_CTL */
267         { 0x46, 0x00}, /* VIBRA_SET */
268         { 0x47, 0x00}, /* VIBRA_PWM_SET */
269         { 0x48, 0x00}, /* ANAMIC_GAIN   */
270         { 0x49, 0x00}, /* MISC_SET_2    */
271         /* End of Audio Registers */
272 };
273
274 static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
275 {
276         switch (reg) {
277         case 0x00:
278         case 0x03:
279         case 0x40:
280         case 0x41:
281         case 0x42:
282                 return false;
283         default:
284                 return true;
285         }
286 }
287
288 static const struct regmap_range twl4030_49_volatile_ranges[] = {
289         regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
290 };
291
292 static const struct regmap_access_table twl4030_49_volatile_table = {
293         .yes_ranges = twl4030_49_volatile_ranges,
294         .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
295 };
296
297 static const struct regmap_config twl4030_regmap_config[4] = {
298         {
299                 /* Address 0x48 */
300                 .reg_bits = 8,
301                 .val_bits = 8,
302                 .max_register = 0xff,
303         },
304         {
305                 /* Address 0x49 */
306                 .reg_bits = 8,
307                 .val_bits = 8,
308                 .max_register = 0xff,
309
310                 .readable_reg = twl4030_49_nop_reg,
311                 .writeable_reg = twl4030_49_nop_reg,
312
313                 .volatile_table = &twl4030_49_volatile_table,
314
315                 .reg_defaults = twl4030_49_defaults,
316                 .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
317                 .cache_type = REGCACHE_MAPLE,
318         },
319         {
320                 /* Address 0x4a */
321                 .reg_bits = 8,
322                 .val_bits = 8,
323                 .max_register = 0xff,
324         },
325         {
326                 /* Address 0x4b */
327                 .reg_bits = 8,
328                 .val_bits = 8,
329                 .max_register = 0xff,
330         },
331 };
332
333 static struct twl_mapping twl6030_map[] = {
334         /*
335          * NOTE:  don't change this table without updating the
336          * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
337          * so they continue to match the order in this table.
338          */
339
340         /* Common IPs */
341         { 1, TWL6030_BASEADD_USB },
342         { 1, TWL6030_BASEADD_PIH },
343         { 1, TWL6030_BASEADD_CHARGER },
344         { 0, TWL6030_BASEADD_PM_MASTER },
345         { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
346
347         { 0, TWL6030_BASEADD_RTC },
348         { 1, TWL6030_BASEADD_PWM },
349         { 1, TWL6030_BASEADD_LED },
350         { 0, TWL6030_BASEADD_SECURED_REG },
351
352         /* TWL6030 specific IPs */
353         { 0, TWL6030_BASEADD_ZERO },
354         { 1, TWL6030_BASEADD_ZERO },
355         { 2, TWL6030_BASEADD_ZERO },
356         { 1, TWL6030_BASEADD_GPADC_CTRL },
357         { 1, TWL6030_BASEADD_GASGAUGE },
358
359         /* TWL6032 specific charger registers */
360         { 1, TWL6032_BASEADD_CHARGER },
361 };
362
363 static const struct regmap_config twl6030_regmap_config[3] = {
364         {
365                 /* Address 0x48 */
366                 .reg_bits = 8,
367                 .val_bits = 8,
368                 .max_register = 0xff,
369         },
370         {
371                 /* Address 0x49 */
372                 .reg_bits = 8,
373                 .val_bits = 8,
374                 .max_register = 0xff,
375         },
376         {
377                 /* Address 0x4a */
378                 .reg_bits = 8,
379                 .val_bits = 8,
380                 .max_register = 0xff,
381         },
382 };
383
384 /*----------------------------------------------------------------------*/
385
386 static inline int twl_get_num_slaves(void)
387 {
388         if (twl_class_is_4030())
389                 return 4; /* TWL4030 class have four slave address */
390         else
391                 return 3; /* TWL6030 class have three slave address */
392 }
393
394 static inline int twl_get_last_module(void)
395 {
396         if (twl_class_is_4030())
397                 return TWL4030_MODULE_LAST;
398         else
399                 return TWL6030_MODULE_LAST;
400 }
401
402 /* Exported Functions */
403
404 unsigned int twl_rev(void)
405 {
406         return twl_priv ? twl_priv->twl_id : 0;
407 }
408 EXPORT_SYMBOL(twl_rev);
409
410 /**
411  * twl_get_regmap - Get the regmap associated with the given module
412  * @mod_no: module number
413  *
414  * Returns the regmap pointer or NULL in case of failure.
415  */
416 static struct regmap *twl_get_regmap(u8 mod_no)
417 {
418         int sid;
419         struct twl_client *twl;
420
421         if (unlikely(!twl_priv || !twl_priv->ready)) {
422                 pr_err("%s: not initialized\n", DRIVER_NAME);
423                 return NULL;
424         }
425         if (unlikely(mod_no >= twl_get_last_module())) {
426                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
427                 return NULL;
428         }
429
430         sid = twl_priv->twl_map[mod_no].sid;
431         twl = &twl_priv->twl_modules[sid];
432
433         return twl->regmap;
434 }
435
436 /**
437  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
438  * @mod_no: module number
439  * @value: an array of num_bytes+1 containing data to write
440  * @reg: register address (just offset will do)
441  * @num_bytes: number of bytes to transfer
442  *
443  * Returns 0 on success or else a negative error code.
444  */
445 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
446 {
447         struct regmap *regmap = twl_get_regmap(mod_no);
448         int ret;
449
450         if (!regmap)
451                 return -EPERM;
452
453         ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
454                                 value, num_bytes);
455
456         if (ret)
457                 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
458                        DRIVER_NAME, mod_no, reg, num_bytes);
459
460         return ret;
461 }
462 EXPORT_SYMBOL(twl_i2c_write);
463
464 /**
465  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
466  * @mod_no: module number
467  * @value: an array of num_bytes containing data to be read
468  * @reg: register address (just offset will do)
469  * @num_bytes: number of bytes to transfer
470  *
471  * Returns 0 on success or else a negative error code.
472  */
473 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
474 {
475         struct regmap *regmap = twl_get_regmap(mod_no);
476         int ret;
477
478         if (!regmap)
479                 return -EPERM;
480
481         ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
482                                value, num_bytes);
483
484         if (ret)
485                 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
486                        DRIVER_NAME, mod_no, reg, num_bytes);
487
488         return ret;
489 }
490 EXPORT_SYMBOL(twl_i2c_read);
491
492 /**
493  * twl_set_regcache_bypass - Configure the regcache bypass for the regmap associated
494  *                       with the module
495  * @mod_no: module number
496  * @enable: Regcache bypass state
497  *
498  * Returns 0 else failure.
499  */
500 int twl_set_regcache_bypass(u8 mod_no, bool enable)
501 {
502         struct regmap *regmap = twl_get_regmap(mod_no);
503
504         if (!regmap)
505                 return -EPERM;
506
507         regcache_cache_bypass(regmap, enable);
508
509         return 0;
510 }
511 EXPORT_SYMBOL(twl_set_regcache_bypass);
512
513 /*----------------------------------------------------------------------*/
514
515 /**
516  * twl_read_idcode_register - API to read the IDCODE register.
517  *
518  * Unlocks the IDCODE register and read the 32 bit value.
519  */
520 static int twl_read_idcode_register(void)
521 {
522         int err;
523
524         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
525                                                 REG_UNLOCK_TEST_REG);
526         if (err) {
527                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
528                 goto fail;
529         }
530
531         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
532                                                 REG_IDCODE_7_0, 4);
533         if (err) {
534                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
535                 goto fail;
536         }
537
538         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
539         if (err)
540                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
541 fail:
542         return err;
543 }
544
545 /**
546  * twl_get_type - API to get TWL Si type.
547  *
548  * Api to get the TWL Si type from IDCODE value.
549  */
550 int twl_get_type(void)
551 {
552         return TWL_SIL_TYPE(twl_priv->twl_idcode);
553 }
554 EXPORT_SYMBOL_GPL(twl_get_type);
555
556 /**
557  * twl_get_version - API to get TWL Si version.
558  *
559  * Api to get the TWL Si version from IDCODE value.
560  */
561 int twl_get_version(void)
562 {
563         return TWL_SIL_REV(twl_priv->twl_idcode);
564 }
565 EXPORT_SYMBOL_GPL(twl_get_version);
566
567 /**
568  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
569  *
570  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
571  */
572 int twl_get_hfclk_rate(void)
573 {
574         u8 ctrl;
575         int rate;
576
577         twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
578
579         switch (ctrl & 0x3) {
580         case HFCLK_FREQ_19p2_MHZ:
581                 rate = 19200000;
582                 break;
583         case HFCLK_FREQ_26_MHZ:
584                 rate = 26000000;
585                 break;
586         case HFCLK_FREQ_38p4_MHZ:
587                 rate = 38400000;
588                 break;
589         default:
590                 pr_err("TWL4030: HFCLK is not configured\n");
591                 rate = -EINVAL;
592                 break;
593         }
594
595         return rate;
596 }
597 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
598
599 /*----------------------------------------------------------------------*/
600
601 /*
602  * These three functions initialize the on-chip clock framework,
603  * letting it generate the right frequencies for USB, MADC, and
604  * other purposes.
605  */
606 static inline int protect_pm_master(void)
607 {
608         int e = 0;
609
610         e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
611                              TWL4030_PM_MASTER_PROTECT_KEY);
612         return e;
613 }
614
615 static inline int unprotect_pm_master(void)
616 {
617         int e = 0;
618
619         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
620                               TWL4030_PM_MASTER_PROTECT_KEY);
621         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
622                               TWL4030_PM_MASTER_PROTECT_KEY);
623
624         return e;
625 }
626
627 static void clocks_init(struct device *dev)
628 {
629         int e = 0;
630         struct clk *osc;
631         u32 rate;
632         u8 ctrl = HFCLK_FREQ_26_MHZ;
633
634         osc = clk_get(dev, "fck");
635         if (IS_ERR(osc)) {
636                 printk(KERN_WARNING "Skipping twl internal clock init and "
637                                 "using bootloader value (unknown osc rate)\n");
638                 return;
639         }
640
641         rate = clk_get_rate(osc);
642         clk_put(osc);
643
644         switch (rate) {
645         case 19200000:
646                 ctrl = HFCLK_FREQ_19p2_MHZ;
647                 break;
648         case 26000000:
649                 ctrl = HFCLK_FREQ_26_MHZ;
650                 break;
651         case 38400000:
652                 ctrl = HFCLK_FREQ_38p4_MHZ;
653                 break;
654         }
655
656         ctrl |= HIGH_PERF_SQ;
657
658         e |= unprotect_pm_master();
659         /* effect->MADC+USB ck en */
660         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
661         e |= protect_pm_master();
662
663         if (e < 0)
664                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
665 }
666
667 /*----------------------------------------------------------------------*/
668
669
670 static void twl_remove(struct i2c_client *client)
671 {
672         unsigned i, num_slaves;
673
674         if (twl_class_is_4030())
675                 twl4030_exit_irq();
676         else
677                 twl6030_exit_irq();
678
679         num_slaves = twl_get_num_slaves();
680         for (i = 0; i < num_slaves; i++) {
681                 struct twl_client       *twl = &twl_priv->twl_modules[i];
682
683                 if (twl->client && twl->client != client)
684                         i2c_unregister_device(twl->client);
685                 twl->client = NULL;
686         }
687         twl_priv->ready = false;
688 }
689
690 static struct of_dev_auxdata twl_auxdata_lookup[] = {
691         OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
692         { /* sentinel */ },
693 };
694
695 static const struct mfd_cell twl6032_cells[] = {
696         { .name = "twl6032-clk" },
697 };
698
699 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
700 static int
701 twl_probe(struct i2c_client *client)
702 {
703         const struct i2c_device_id *id = i2c_client_get_device_id(client);
704         struct device_node              *node = client->dev.of_node;
705         struct platform_device          *pdev;
706         const struct regmap_config      *twl_regmap_config;
707         int                             irq_base = 0;
708         int                             status;
709         unsigned                        i, num_slaves;
710
711         if (!node) {
712                 dev_err(&client->dev, "no platform data\n");
713                 return -EINVAL;
714         }
715
716         if (twl_priv) {
717                 dev_dbg(&client->dev, "only one instance of %s allowed\n",
718                         DRIVER_NAME);
719                 return -EBUSY;
720         }
721
722         pdev = platform_device_alloc(DRIVER_NAME, -1);
723         if (!pdev) {
724                 dev_err(&client->dev, "can't alloc pdev\n");
725                 return -ENOMEM;
726         }
727
728         status = platform_device_add(pdev);
729         if (status) {
730                 platform_device_put(pdev);
731                 return status;
732         }
733
734         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
735                 dev_dbg(&client->dev, "can't talk I2C?\n");
736                 status = -EIO;
737                 goto free;
738         }
739
740         twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
741                                 GFP_KERNEL);
742         if (!twl_priv) {
743                 status = -ENOMEM;
744                 goto free;
745         }
746
747         if ((id->driver_data) & TWL6030_CLASS) {
748                 twl_priv->twl_id = TWL6030_CLASS_ID;
749                 twl_priv->twl_map = &twl6030_map[0];
750                 twl_regmap_config = twl6030_regmap_config;
751         } else {
752                 twl_priv->twl_id = TWL4030_CLASS_ID;
753                 twl_priv->twl_map = &twl4030_map[0];
754                 twl_regmap_config = twl4030_regmap_config;
755         }
756
757         num_slaves = twl_get_num_slaves();
758         twl_priv->twl_modules = devm_kcalloc(&client->dev,
759                                          num_slaves,
760                                          sizeof(struct twl_client),
761                                          GFP_KERNEL);
762         if (!twl_priv->twl_modules) {
763                 status = -ENOMEM;
764                 goto free;
765         }
766
767         for (i = 0; i < num_slaves; i++) {
768                 struct twl_client *twl = &twl_priv->twl_modules[i];
769
770                 if (i == 0) {
771                         twl->client = client;
772                 } else {
773                         twl->client = i2c_new_dummy_device(client->adapter,
774                                                     client->addr + i);
775                         if (IS_ERR(twl->client)) {
776                                 dev_err(&client->dev,
777                                         "can't attach client %d\n", i);
778                                 status = PTR_ERR(twl->client);
779                                 goto fail;
780                         }
781                 }
782
783                 twl->regmap = devm_regmap_init_i2c(twl->client,
784                                                    &twl_regmap_config[i]);
785                 if (IS_ERR(twl->regmap)) {
786                         status = PTR_ERR(twl->regmap);
787                         dev_err(&client->dev,
788                                 "Failed to allocate regmap %d, err: %d\n", i,
789                                 status);
790                         goto fail;
791                 }
792         }
793
794         twl_priv->ready = true;
795
796         /* setup clock framework */
797         clocks_init(&client->dev);
798
799         /* read TWL IDCODE Register */
800         if (twl_class_is_4030()) {
801                 status = twl_read_idcode_register();
802                 WARN(status < 0, "Error: reading twl_idcode register value\n");
803         }
804
805         /* Maybe init the T2 Interrupt subsystem */
806         if (client->irq) {
807                 if (twl_class_is_4030()) {
808                         twl4030_init_chip_irq(id->name);
809                         irq_base = twl4030_init_irq(&client->dev, client->irq);
810                 } else {
811                         irq_base = twl6030_init_irq(&client->dev, client->irq);
812                 }
813
814                 if (irq_base < 0) {
815                         status = irq_base;
816                         goto fail;
817                 }
818         }
819
820         /*
821          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
822          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
823          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
824          *
825          * Also, always enable SmartReflex bit as that's needed for omaps to
826          * do anything over I2C4 for voltage scaling even if SmartReflex
827          * is disabled. Without the SmartReflex bit omap sys_clkreq idle
828          * signal will never trigger for retention idle.
829          */
830         if (twl_class_is_4030()) {
831                 u8 temp;
832
833                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
834                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
835                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
836                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
837
838                 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
839                                 TWL4030_DCDC_GLOBAL_CFG);
840                 temp |= SMARTREFLEX_ENABLE;
841                 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
842                                  TWL4030_DCDC_GLOBAL_CFG);
843         }
844
845         if (id->driver_data == (TWL6030_CLASS | TWL6032_SUBCLASS)) {
846                 status = devm_mfd_add_devices(&client->dev,
847                                               PLATFORM_DEVID_NONE,
848                                               twl6032_cells,
849                                               ARRAY_SIZE(twl6032_cells),
850                                               NULL, 0, NULL);
851                 if (status < 0)
852                         goto free;
853         }
854
855         status = of_platform_populate(node, NULL, twl_auxdata_lookup,
856                                       &client->dev);
857
858 fail:
859         if (status < 0)
860                 twl_remove(client);
861 free:
862         if (status < 0)
863                 platform_device_unregister(pdev);
864
865         return status;
866 }
867
868 static int __maybe_unused twl_suspend(struct device *dev)
869 {
870         struct i2c_client *client = to_i2c_client(dev);
871
872         if (client->irq)
873                 disable_irq(client->irq);
874
875         return 0;
876 }
877
878 static int __maybe_unused twl_resume(struct device *dev)
879 {
880         struct i2c_client *client = to_i2c_client(dev);
881
882         if (client->irq)
883                 enable_irq(client->irq);
884
885         return 0;
886 }
887
888 static SIMPLE_DEV_PM_OPS(twl_dev_pm_ops, twl_suspend, twl_resume);
889
890 static const struct i2c_device_id twl_ids[] = {
891         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
892         { "twl5030", 0 },               /* T2 updated */
893         { "twl5031", TWL5031 },         /* TWL5030 updated */
894         { "tps65950", 0 },              /* catalog version of twl5030 */
895         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
896         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
897         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
898                                            and vibrator. Charger in USB module*/
899         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
900         { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
901         { /* end of list */ },
902 };
903
904 /* One Client Driver , 4 Clients */
905 static struct i2c_driver twl_driver = {
906         .driver.name    = DRIVER_NAME,
907         .driver.pm      = &twl_dev_pm_ops,
908         .id_table       = twl_ids,
909         .probe          = twl_probe,
910         .remove         = twl_remove,
911 };
912 builtin_i2c_driver(twl_driver);