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 #include <linux/mfd/twl.h>
35 
36 /* Register descriptions for audio */
37 #include <linux/mfd/twl4030-audio.h>
38 
39 #include "twl-core.h"
40 
41 /*
42  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
43  * Management and System Companion Device" chips originally designed for
44  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
45  * often at around 3 Mbit/sec, including for interrupt handling.
46  *
47  * This driver core provides genirq support for the interrupts emitted,
48  * by the various modules, and exports register access primitives.
49  *
50  * FIXME this driver currently requires use of the first interrupt line
51  * (and associated registers).
52  */
53 
54 #define DRIVER_NAME			"twl"
55 
56 /* Triton Core internal information (BEGIN) */
57 
58 /* Base Address defns for twl4030_map[] */
59 
60 /* subchip/slave 0 - USB ID */
61 #define TWL4030_BASEADD_USB		0x0000
62 
63 /* subchip/slave 1 - AUD ID */
64 #define TWL4030_BASEADD_AUDIO_VOICE	0x0000
65 #define TWL4030_BASEADD_GPIO		0x0098
66 #define TWL4030_BASEADD_INTBR		0x0085
67 #define TWL4030_BASEADD_PIH		0x0080
68 #define TWL4030_BASEADD_TEST		0x004C
69 
70 /* subchip/slave 2 - AUX ID */
71 #define TWL4030_BASEADD_INTERRUPTS	0x00B9
72 #define TWL4030_BASEADD_LED		0x00EE
73 #define TWL4030_BASEADD_MADC		0x0000
74 #define TWL4030_BASEADD_MAIN_CHARGE	0x0074
75 #define TWL4030_BASEADD_PRECHARGE	0x00AA
76 #define TWL4030_BASEADD_PWM		0x00F8
77 #define TWL4030_BASEADD_KEYPAD		0x00D2
78 
79 #define TWL5031_BASEADD_ACCESSORY	0x0074 /* Replaces Main Charge */
80 #define TWL5031_BASEADD_INTERRUPTS	0x00B9 /* Different than TWL4030's
81 						  one */
82 
83 /* subchip/slave 3 - POWER ID */
84 #define TWL4030_BASEADD_BACKUP		0x0014
85 #define TWL4030_BASEADD_INT		0x002E
86 #define TWL4030_BASEADD_PM_MASTER	0x0036
87 
88 #define TWL4030_BASEADD_PM_RECEIVER	0x005B
89 #define TWL4030_DCDC_GLOBAL_CFG		0x06
90 #define SMARTREFLEX_ENABLE		BIT(3)
91 
92 #define TWL4030_BASEADD_RTC		0x001C
93 #define TWL4030_BASEADD_SECURED_REG	0x0000
94 
95 /* Triton Core internal information (END) */
96 
97 
98 /* subchip/slave 0 0x48 - POWER */
99 #define TWL6030_BASEADD_RTC		0x0000
100 #define TWL6030_BASEADD_SECURED_REG	0x0017
101 #define TWL6030_BASEADD_PM_MASTER	0x001F
102 #define TWL6030_BASEADD_PM_SLAVE_MISC	0x0030 /* PM_RECEIVER */
103 #define TWL6030_BASEADD_PM_MISC		0x00E2
104 #define TWL6030_BASEADD_PM_PUPD		0x00F0
105 
106 /* subchip/slave 1 0x49 - FEATURE */
107 #define TWL6030_BASEADD_USB		0x0000
108 #define TWL6030_BASEADD_GPADC_CTRL	0x002E
109 #define TWL6030_BASEADD_AUX		0x0090
110 #define TWL6030_BASEADD_PWM		0x00BA
111 #define TWL6030_BASEADD_GASGAUGE	0x00C0
112 #define TWL6030_BASEADD_PIH		0x00D0
113 #define TWL6030_BASEADD_CHARGER		0x00E0
114 #define TWL6032_BASEADD_CHARGER		0x00DA
115 #define TWL6030_BASEADD_LED		0x00F4
116 
117 /* subchip/slave 2 0x4A - DFT */
118 #define TWL6030_BASEADD_DIEID		0x00C0
119 
120 /* subchip/slave 3 0x4B - AUDIO */
121 #define TWL6030_BASEADD_AUDIO		0x0000
122 #define TWL6030_BASEADD_RSV		0x0000
123 #define TWL6030_BASEADD_ZERO		0x0000
124 
125 /* Few power values */
126 #define R_CFG_BOOT			0x05
127 
128 /* some fields in R_CFG_BOOT */
129 #define HFCLK_FREQ_19p2_MHZ		(1 << 0)
130 #define HFCLK_FREQ_26_MHZ		(2 << 0)
131 #define HFCLK_FREQ_38p4_MHZ		(3 << 0)
132 #define HIGH_PERF_SQ			(1 << 3)
133 #define CK32K_LOWPWR_EN			(1 << 7)
134 
135 /*----------------------------------------------------------------------*/
136 
137 /* Structure for each TWL4030/TWL6030 Slave */
138 struct twl_client {
139 	struct i2c_client *client;
140 	struct regmap *regmap;
141 };
142 
143 /* mapping the module id to slave id and base address */
144 struct twl_mapping {
145 	unsigned char sid;	/* Slave ID */
146 	unsigned char base;	/* base address */
147 };
148 
149 struct twl_private {
150 	bool ready; /* The core driver is ready to be used */
151 	u32 twl_idcode; /* TWL IDCODE Register value */
152 	unsigned int twl_id;
153 
154 	struct twl_mapping *twl_map;
155 	struct twl_client *twl_modules;
156 };
157 
158 static struct twl_private *twl_priv;
159 
160 static struct twl_mapping twl4030_map[] = {
161 	/*
162 	 * NOTE:  don't change this table without updating the
163 	 * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
164 	 * so they continue to match the order in this table.
165 	 */
166 
167 	/* Common IPs */
168 	{ 0, TWL4030_BASEADD_USB },
169 	{ 1, TWL4030_BASEADD_PIH },
170 	{ 2, TWL4030_BASEADD_MAIN_CHARGE },
171 	{ 3, TWL4030_BASEADD_PM_MASTER },
172 	{ 3, TWL4030_BASEADD_PM_RECEIVER },
173 
174 	{ 3, TWL4030_BASEADD_RTC },
175 	{ 2, TWL4030_BASEADD_PWM },
176 	{ 2, TWL4030_BASEADD_LED },
177 	{ 3, TWL4030_BASEADD_SECURED_REG },
178 
179 	/* TWL4030 specific IPs */
180 	{ 1, TWL4030_BASEADD_AUDIO_VOICE },
181 	{ 1, TWL4030_BASEADD_GPIO },
182 	{ 1, TWL4030_BASEADD_INTBR },
183 	{ 1, TWL4030_BASEADD_TEST },
184 	{ 2, TWL4030_BASEADD_KEYPAD },
185 
186 	{ 2, TWL4030_BASEADD_MADC },
187 	{ 2, TWL4030_BASEADD_INTERRUPTS },
188 	{ 2, TWL4030_BASEADD_PRECHARGE },
189 	{ 3, TWL4030_BASEADD_BACKUP },
190 	{ 3, TWL4030_BASEADD_INT },
191 
192 	{ 2, TWL5031_BASEADD_ACCESSORY },
193 	{ 2, TWL5031_BASEADD_INTERRUPTS },
194 };
195 
196 static const struct reg_default twl4030_49_defaults[] = {
197 	/* Audio Registers */
198 	{ 0x01, 0x00}, /* CODEC_MODE	*/
199 	{ 0x02, 0x00}, /* OPTION	*/
200 	/* 0x03  Unused	*/
201 	{ 0x04, 0x00}, /* MICBIAS_CTL	*/
202 	{ 0x05, 0x00}, /* ANAMICL	*/
203 	{ 0x06, 0x00}, /* ANAMICR	*/
204 	{ 0x07, 0x00}, /* AVADC_CTL	*/
205 	{ 0x08, 0x00}, /* ADCMICSEL	*/
206 	{ 0x09, 0x00}, /* DIGMIXING	*/
207 	{ 0x0a, 0x0f}, /* ATXL1PGA	*/
208 	{ 0x0b, 0x0f}, /* ATXR1PGA	*/
209 	{ 0x0c, 0x0f}, /* AVTXL2PGA	*/
210 	{ 0x0d, 0x0f}, /* AVTXR2PGA	*/
211 	{ 0x0e, 0x00}, /* AUDIO_IF	*/
212 	{ 0x0f, 0x00}, /* VOICE_IF	*/
213 	{ 0x10, 0x3f}, /* ARXR1PGA	*/
214 	{ 0x11, 0x3f}, /* ARXL1PGA	*/
215 	{ 0x12, 0x3f}, /* ARXR2PGA	*/
216 	{ 0x13, 0x3f}, /* ARXL2PGA	*/
217 	{ 0x14, 0x25}, /* VRXPGA	*/
218 	{ 0x15, 0x00}, /* VSTPGA	*/
219 	{ 0x16, 0x00}, /* VRX2ARXPGA	*/
220 	{ 0x17, 0x00}, /* AVDAC_CTL	*/
221 	{ 0x18, 0x00}, /* ARX2VTXPGA	*/
222 	{ 0x19, 0x32}, /* ARXL1_APGA_CTL*/
223 	{ 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
224 	{ 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
225 	{ 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
226 	{ 0x1d, 0x00}, /* ATX2ARXPGA	*/
227 	{ 0x1e, 0x00}, /* BT_IF		*/
228 	{ 0x1f, 0x55}, /* BTPGA		*/
229 	{ 0x20, 0x00}, /* BTSTPGA	*/
230 	{ 0x21, 0x00}, /* EAR_CTL	*/
231 	{ 0x22, 0x00}, /* HS_SEL	*/
232 	{ 0x23, 0x00}, /* HS_GAIN_SET	*/
233 	{ 0x24, 0x00}, /* HS_POPN_SET	*/
234 	{ 0x25, 0x00}, /* PREDL_CTL	*/
235 	{ 0x26, 0x00}, /* PREDR_CTL	*/
236 	{ 0x27, 0x00}, /* PRECKL_CTL	*/
237 	{ 0x28, 0x00}, /* PRECKR_CTL	*/
238 	{ 0x29, 0x00}, /* HFL_CTL	*/
239 	{ 0x2a, 0x00}, /* HFR_CTL	*/
240 	{ 0x2b, 0x05}, /* ALC_CTL	*/
241 	{ 0x2c, 0x00}, /* ALC_SET1	*/
242 	{ 0x2d, 0x00}, /* ALC_SET2	*/
243 	{ 0x2e, 0x00}, /* BOOST_CTL	*/
244 	{ 0x2f, 0x00}, /* SOFTVOL_CTL	*/
245 	{ 0x30, 0x13}, /* DTMF_FREQSEL	*/
246 	{ 0x31, 0x00}, /* DTMF_TONEXT1H	*/
247 	{ 0x32, 0x00}, /* DTMF_TONEXT1L	*/
248 	{ 0x33, 0x00}, /* DTMF_TONEXT2H	*/
249 	{ 0x34, 0x00}, /* DTMF_TONEXT2L	*/
250 	{ 0x35, 0x79}, /* DTMF_TONOFF	*/
251 	{ 0x36, 0x11}, /* DTMF_WANONOFF	*/
252 	{ 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
253 	{ 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
254 	{ 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
255 	{ 0x3a, 0x06}, /* APLL_CTL */
256 	{ 0x3b, 0x00}, /* DTMF_CTL */
257 	{ 0x3c, 0x44}, /* DTMF_PGA_CTL2	(0x3C) */
258 	{ 0x3d, 0x69}, /* DTMF_PGA_CTL1	(0x3D) */
259 	{ 0x3e, 0x00}, /* MISC_SET_1 */
260 	{ 0x3f, 0x00}, /* PCMBTMUX */
261 	/* 0x40 - 0x42  Unused */
262 	{ 0x43, 0x00}, /* RX_PATH_SEL */
263 	{ 0x44, 0x32}, /* VDL_APGA_CTL */
264 	{ 0x45, 0x00}, /* VIBRA_CTL */
265 	{ 0x46, 0x00}, /* VIBRA_SET */
266 	{ 0x47, 0x00}, /* VIBRA_PWM_SET	*/
267 	{ 0x48, 0x00}, /* ANAMIC_GAIN	*/
268 	{ 0x49, 0x00}, /* MISC_SET_2	*/
269 	/* End of Audio Registers */
270 };
271 
twl4030_49_nop_reg(struct device * dev,unsigned int reg)272 static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
273 {
274 	switch (reg) {
275 	case 0x00:
276 	case 0x03:
277 	case 0x40:
278 	case 0x41:
279 	case 0x42:
280 		return false;
281 	default:
282 		return true;
283 	}
284 }
285 
286 static const struct regmap_range twl4030_49_volatile_ranges[] = {
287 	regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
288 };
289 
290 static const struct regmap_access_table twl4030_49_volatile_table = {
291 	.yes_ranges = twl4030_49_volatile_ranges,
292 	.n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
293 };
294 
295 static const struct regmap_config twl4030_regmap_config[4] = {
296 	{
297 		/* Address 0x48 */
298 		.reg_bits = 8,
299 		.val_bits = 8,
300 		.max_register = 0xff,
301 	},
302 	{
303 		/* Address 0x49 */
304 		.reg_bits = 8,
305 		.val_bits = 8,
306 		.max_register = 0xff,
307 
308 		.readable_reg = twl4030_49_nop_reg,
309 		.writeable_reg = twl4030_49_nop_reg,
310 
311 		.volatile_table = &twl4030_49_volatile_table,
312 
313 		.reg_defaults = twl4030_49_defaults,
314 		.num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
315 		.cache_type = REGCACHE_RBTREE,
316 	},
317 	{
318 		/* Address 0x4a */
319 		.reg_bits = 8,
320 		.val_bits = 8,
321 		.max_register = 0xff,
322 	},
323 	{
324 		/* Address 0x4b */
325 		.reg_bits = 8,
326 		.val_bits = 8,
327 		.max_register = 0xff,
328 	},
329 };
330 
331 static struct twl_mapping twl6030_map[] = {
332 	/*
333 	 * NOTE:  don't change this table without updating the
334 	 * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
335 	 * so they continue to match the order in this table.
336 	 */
337 
338 	/* Common IPs */
339 	{ 1, TWL6030_BASEADD_USB },
340 	{ 1, TWL6030_BASEADD_PIH },
341 	{ 1, TWL6030_BASEADD_CHARGER },
342 	{ 0, TWL6030_BASEADD_PM_MASTER },
343 	{ 0, TWL6030_BASEADD_PM_SLAVE_MISC },
344 
345 	{ 0, TWL6030_BASEADD_RTC },
346 	{ 1, TWL6030_BASEADD_PWM },
347 	{ 1, TWL6030_BASEADD_LED },
348 	{ 0, TWL6030_BASEADD_SECURED_REG },
349 
350 	/* TWL6030 specific IPs */
351 	{ 0, TWL6030_BASEADD_ZERO },
352 	{ 1, TWL6030_BASEADD_ZERO },
353 	{ 2, TWL6030_BASEADD_ZERO },
354 	{ 1, TWL6030_BASEADD_GPADC_CTRL },
355 	{ 1, TWL6030_BASEADD_GASGAUGE },
356 };
357 
358 static const struct regmap_config twl6030_regmap_config[3] = {
359 	{
360 		/* Address 0x48 */
361 		.reg_bits = 8,
362 		.val_bits = 8,
363 		.max_register = 0xff,
364 	},
365 	{
366 		/* Address 0x49 */
367 		.reg_bits = 8,
368 		.val_bits = 8,
369 		.max_register = 0xff,
370 	},
371 	{
372 		/* Address 0x4a */
373 		.reg_bits = 8,
374 		.val_bits = 8,
375 		.max_register = 0xff,
376 	},
377 };
378 
379 /*----------------------------------------------------------------------*/
380 
twl_get_num_slaves(void)381 static inline int twl_get_num_slaves(void)
382 {
383 	if (twl_class_is_4030())
384 		return 4; /* TWL4030 class have four slave address */
385 	else
386 		return 3; /* TWL6030 class have three slave address */
387 }
388 
twl_get_last_module(void)389 static inline int twl_get_last_module(void)
390 {
391 	if (twl_class_is_4030())
392 		return TWL4030_MODULE_LAST;
393 	else
394 		return TWL6030_MODULE_LAST;
395 }
396 
397 /* Exported Functions */
398 
twl_rev(void)399 unsigned int twl_rev(void)
400 {
401 	return twl_priv ? twl_priv->twl_id : 0;
402 }
403 EXPORT_SYMBOL(twl_rev);
404 
405 /**
406  * twl_get_regmap - Get the regmap associated with the given module
407  * @mod_no: module number
408  *
409  * Returns the regmap pointer or NULL in case of failure.
410  */
twl_get_regmap(u8 mod_no)411 static struct regmap *twl_get_regmap(u8 mod_no)
412 {
413 	int sid;
414 	struct twl_client *twl;
415 
416 	if (unlikely(!twl_priv || !twl_priv->ready)) {
417 		pr_err("%s: not initialized\n", DRIVER_NAME);
418 		return NULL;
419 	}
420 	if (unlikely(mod_no >= twl_get_last_module())) {
421 		pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
422 		return NULL;
423 	}
424 
425 	sid = twl_priv->twl_map[mod_no].sid;
426 	twl = &twl_priv->twl_modules[sid];
427 
428 	return twl->regmap;
429 }
430 
431 /**
432  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
433  * @mod_no: module number
434  * @value: an array of num_bytes+1 containing data to write
435  * @reg: register address (just offset will do)
436  * @num_bytes: number of bytes to transfer
437  *
438  * Returns 0 on success or else a negative error code.
439  */
twl_i2c_write(u8 mod_no,u8 * value,u8 reg,unsigned num_bytes)440 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
441 {
442 	struct regmap *regmap = twl_get_regmap(mod_no);
443 	int ret;
444 
445 	if (!regmap)
446 		return -EPERM;
447 
448 	ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
449 				value, num_bytes);
450 
451 	if (ret)
452 		pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
453 		       DRIVER_NAME, mod_no, reg, num_bytes);
454 
455 	return ret;
456 }
457 EXPORT_SYMBOL(twl_i2c_write);
458 
459 /**
460  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
461  * @mod_no: module number
462  * @value: an array of num_bytes containing data to be read
463  * @reg: register address (just offset will do)
464  * @num_bytes: number of bytes to transfer
465  *
466  * Returns 0 on success or else a negative error code.
467  */
twl_i2c_read(u8 mod_no,u8 * value,u8 reg,unsigned num_bytes)468 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
469 {
470 	struct regmap *regmap = twl_get_regmap(mod_no);
471 	int ret;
472 
473 	if (!regmap)
474 		return -EPERM;
475 
476 	ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
477 			       value, num_bytes);
478 
479 	if (ret)
480 		pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
481 		       DRIVER_NAME, mod_no, reg, num_bytes);
482 
483 	return ret;
484 }
485 EXPORT_SYMBOL(twl_i2c_read);
486 
487 /**
488  * twl_set_regcache_bypass - Configure the regcache bypass for the regmap associated
489  *			 with the module
490  * @mod_no: module number
491  * @enable: Regcache bypass state
492  *
493  * Returns 0 else failure.
494  */
twl_set_regcache_bypass(u8 mod_no,bool enable)495 int twl_set_regcache_bypass(u8 mod_no, bool enable)
496 {
497 	struct regmap *regmap = twl_get_regmap(mod_no);
498 
499 	if (!regmap)
500 		return -EPERM;
501 
502 	regcache_cache_bypass(regmap, enable);
503 
504 	return 0;
505 }
506 EXPORT_SYMBOL(twl_set_regcache_bypass);
507 
508 /*----------------------------------------------------------------------*/
509 
510 /**
511  * twl_read_idcode_register - API to read the IDCODE register.
512  *
513  * Unlocks the IDCODE register and read the 32 bit value.
514  */
twl_read_idcode_register(void)515 static int twl_read_idcode_register(void)
516 {
517 	int err;
518 
519 	err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
520 						REG_UNLOCK_TEST_REG);
521 	if (err) {
522 		pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
523 		goto fail;
524 	}
525 
526 	err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
527 						REG_IDCODE_7_0, 4);
528 	if (err) {
529 		pr_err("TWL4030: unable to read IDCODE -%d\n", err);
530 		goto fail;
531 	}
532 
533 	err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
534 	if (err)
535 		pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
536 fail:
537 	return err;
538 }
539 
540 /**
541  * twl_get_type - API to get TWL Si type.
542  *
543  * Api to get the TWL Si type from IDCODE value.
544  */
twl_get_type(void)545 int twl_get_type(void)
546 {
547 	return TWL_SIL_TYPE(twl_priv->twl_idcode);
548 }
549 EXPORT_SYMBOL_GPL(twl_get_type);
550 
551 /**
552  * twl_get_version - API to get TWL Si version.
553  *
554  * Api to get the TWL Si version from IDCODE value.
555  */
twl_get_version(void)556 int twl_get_version(void)
557 {
558 	return TWL_SIL_REV(twl_priv->twl_idcode);
559 }
560 EXPORT_SYMBOL_GPL(twl_get_version);
561 
562 /**
563  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
564  *
565  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
566  */
twl_get_hfclk_rate(void)567 int twl_get_hfclk_rate(void)
568 {
569 	u8 ctrl;
570 	int rate;
571 
572 	twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
573 
574 	switch (ctrl & 0x3) {
575 	case HFCLK_FREQ_19p2_MHZ:
576 		rate = 19200000;
577 		break;
578 	case HFCLK_FREQ_26_MHZ:
579 		rate = 26000000;
580 		break;
581 	case HFCLK_FREQ_38p4_MHZ:
582 		rate = 38400000;
583 		break;
584 	default:
585 		pr_err("TWL4030: HFCLK is not configured\n");
586 		rate = -EINVAL;
587 		break;
588 	}
589 
590 	return rate;
591 }
592 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
593 
594 static struct device *
add_numbered_child(unsigned mod_no,const char * name,int num,void * pdata,unsigned pdata_len,bool can_wakeup,int irq0,int irq1)595 add_numbered_child(unsigned mod_no, const char *name, int num,
596 		void *pdata, unsigned pdata_len,
597 		bool can_wakeup, int irq0, int irq1)
598 {
599 	struct platform_device	*pdev;
600 	struct twl_client	*twl;
601 	int			status, sid;
602 
603 	if (unlikely(mod_no >= twl_get_last_module())) {
604 		pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
605 		return ERR_PTR(-EPERM);
606 	}
607 	sid = twl_priv->twl_map[mod_no].sid;
608 	twl = &twl_priv->twl_modules[sid];
609 
610 	pdev = platform_device_alloc(name, num);
611 	if (!pdev)
612 		return ERR_PTR(-ENOMEM);
613 
614 	pdev->dev.parent = &twl->client->dev;
615 
616 	if (pdata) {
617 		status = platform_device_add_data(pdev, pdata, pdata_len);
618 		if (status < 0) {
619 			dev_dbg(&pdev->dev, "can't add platform_data\n");
620 			goto put_device;
621 		}
622 	}
623 
624 	if (irq0) {
625 		struct resource r[2] = {
626 			{ .start = irq0, .flags = IORESOURCE_IRQ, },
627 			{ .start = irq1, .flags = IORESOURCE_IRQ, },
628 		};
629 
630 		status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
631 		if (status < 0) {
632 			dev_dbg(&pdev->dev, "can't add irqs\n");
633 			goto put_device;
634 		}
635 	}
636 
637 	status = platform_device_add(pdev);
638 	if (status)
639 		goto put_device;
640 
641 	device_init_wakeup(&pdev->dev, can_wakeup);
642 
643 	return &pdev->dev;
644 
645 put_device:
646 	platform_device_put(pdev);
647 	dev_err(&twl->client->dev, "failed to add device %s\n", name);
648 	return ERR_PTR(status);
649 }
650 
add_child(unsigned mod_no,const char * name,void * pdata,unsigned pdata_len,bool can_wakeup,int irq0,int irq1)651 static inline struct device *add_child(unsigned mod_no, const char *name,
652 		void *pdata, unsigned pdata_len,
653 		bool can_wakeup, int irq0, int irq1)
654 {
655 	return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
656 		can_wakeup, irq0, irq1);
657 }
658 
659 static struct device *
add_regulator_linked(int num,struct regulator_init_data * pdata,struct regulator_consumer_supply * consumers,unsigned num_consumers,unsigned long features)660 add_regulator_linked(int num, struct regulator_init_data *pdata,
661 		struct regulator_consumer_supply *consumers,
662 		unsigned num_consumers, unsigned long features)
663 {
664 	struct twl_regulator_driver_data drv_data;
665 
666 	/* regulator framework demands init_data ... */
667 	if (!pdata)
668 		return NULL;
669 
670 	if (consumers) {
671 		pdata->consumer_supplies = consumers;
672 		pdata->num_consumer_supplies = num_consumers;
673 	}
674 
675 	if (pdata->driver_data) {
676 		/* If we have existing drv_data, just add the flags */
677 		struct twl_regulator_driver_data *tmp;
678 		tmp = pdata->driver_data;
679 		tmp->features |= features;
680 	} else {
681 		/* add new driver data struct, used only during init */
682 		drv_data.features = features;
683 		drv_data.set_voltage = NULL;
684 		drv_data.get_voltage = NULL;
685 		drv_data.data = NULL;
686 		pdata->driver_data = &drv_data;
687 	}
688 
689 	/* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
690 	return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
691 		pdata, sizeof(*pdata), false, 0, 0);
692 }
693 
694 static struct device *
add_regulator(int num,struct regulator_init_data * pdata,unsigned long features)695 add_regulator(int num, struct regulator_init_data *pdata,
696 		unsigned long features)
697 {
698 	return add_regulator_linked(num, pdata, NULL, 0, features);
699 }
700 
701 /*
702  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
703  * for the PIH, and the next are for the PWR_INT SIH, since
704  * that's how twl_init_irq() sets things up.
705  */
706 
707 static int
add_children(struct twl4030_platform_data * pdata,unsigned irq_base,unsigned long features)708 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
709 		unsigned long features)
710 {
711 	struct device	*child;
712 
713 	if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
714 		child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
715 				pdata->gpio, sizeof(*pdata->gpio),
716 				false, irq_base + GPIO_INTR_OFFSET, 0);
717 		if (IS_ERR(child))
718 			return PTR_ERR(child);
719 	}
720 
721 	if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
722 		child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
723 				pdata->keypad, sizeof(*pdata->keypad),
724 				true, irq_base + KEYPAD_INTR_OFFSET, 0);
725 		if (IS_ERR(child))
726 			return PTR_ERR(child);
727 	}
728 
729 	if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
730 	    twl_class_is_4030()) {
731 		child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
732 				pdata->madc, sizeof(*pdata->madc),
733 				true, irq_base + MADC_INTR_OFFSET, 0);
734 		if (IS_ERR(child))
735 			return PTR_ERR(child);
736 	}
737 
738 	if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
739 		/*
740 		 * REVISIT platform_data here currently might expose the
741 		 * "msecure" line ... but for now we just expect board
742 		 * setup to tell the chip "it's always ok to SET_TIME".
743 		 * Eventually, Linux might become more aware of such
744 		 * HW security concerns, and "least privilege".
745 		 */
746 		child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
747 				true, irq_base + RTC_INTR_OFFSET, 0);
748 		if (IS_ERR(child))
749 			return PTR_ERR(child);
750 	}
751 
752 	if (IS_ENABLED(CONFIG_PWM_TWL)) {
753 		child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
754 				  false, 0, 0);
755 		if (IS_ERR(child))
756 			return PTR_ERR(child);
757 	}
758 
759 	if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
760 		child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
761 				  false, 0, 0);
762 		if (IS_ERR(child))
763 			return PTR_ERR(child);
764 	}
765 
766 	if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
767 	    twl_class_is_4030()) {
768 
769 		static struct regulator_consumer_supply usb1v5 = {
770 			.supply =	"usb1v5",
771 		};
772 		static struct regulator_consumer_supply usb1v8 = {
773 			.supply =	"usb1v8",
774 		};
775 		static struct regulator_consumer_supply usb3v1 = {
776 			.supply =	"usb3v1",
777 		};
778 
779 	/* First add the regulators so that they can be used by transceiver */
780 		if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
781 			/* this is a template that gets copied */
782 			struct regulator_init_data usb_fixed = {
783 				.constraints.valid_modes_mask =
784 					REGULATOR_MODE_NORMAL
785 					| REGULATOR_MODE_STANDBY,
786 				.constraints.valid_ops_mask =
787 					REGULATOR_CHANGE_MODE
788 					| REGULATOR_CHANGE_STATUS,
789 			};
790 
791 			child = add_regulator_linked(TWL4030_REG_VUSB1V5,
792 						      &usb_fixed, &usb1v5, 1,
793 						      features);
794 			if (IS_ERR(child))
795 				return PTR_ERR(child);
796 
797 			child = add_regulator_linked(TWL4030_REG_VUSB1V8,
798 						      &usb_fixed, &usb1v8, 1,
799 						      features);
800 			if (IS_ERR(child))
801 				return PTR_ERR(child);
802 
803 			child = add_regulator_linked(TWL4030_REG_VUSB3V1,
804 						      &usb_fixed, &usb3v1, 1,
805 						      features);
806 			if (IS_ERR(child))
807 				return PTR_ERR(child);
808 
809 		}
810 
811 		child = add_child(TWL_MODULE_USB, "twl4030_usb",
812 				pdata->usb, sizeof(*pdata->usb), true,
813 				/* irq0 = USB_PRES, irq1 = USB */
814 				irq_base + USB_PRES_INTR_OFFSET,
815 				irq_base + USB_INTR_OFFSET);
816 
817 		if (IS_ERR(child))
818 			return PTR_ERR(child);
819 
820 		/* we need to connect regulators to this transceiver */
821 		if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
822 			usb1v5.dev_name = dev_name(child);
823 			usb1v8.dev_name = dev_name(child);
824 			usb3v1.dev_name = dev_name(child);
825 		}
826 	}
827 
828 	if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
829 		child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
830 				  0, false, 0, 0);
831 		if (IS_ERR(child))
832 			return PTR_ERR(child);
833 	}
834 
835 	if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
836 		child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
837 				  NULL, 0, true, irq_base + 8 + 0, 0);
838 		if (IS_ERR(child))
839 			return PTR_ERR(child);
840 	}
841 
842 	if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
843 	    twl_class_is_4030()) {
844 		child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
845 				pdata->audio, sizeof(*pdata->audio),
846 				false, 0, 0);
847 		if (IS_ERR(child))
848 			return PTR_ERR(child);
849 	}
850 
851 	/* twl4030 regulators */
852 	if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
853 		child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
854 					features);
855 		if (IS_ERR(child))
856 			return PTR_ERR(child);
857 
858 		child = add_regulator(TWL4030_REG_VIO, pdata->vio,
859 					features);
860 		if (IS_ERR(child))
861 			return PTR_ERR(child);
862 
863 		child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
864 					features);
865 		if (IS_ERR(child))
866 			return PTR_ERR(child);
867 
868 		child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
869 					features);
870 		if (IS_ERR(child))
871 			return PTR_ERR(child);
872 
873 		child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
874 					features);
875 		if (IS_ERR(child))
876 			return PTR_ERR(child);
877 
878 		child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
879 					features);
880 		if (IS_ERR(child))
881 			return PTR_ERR(child);
882 
883 		child = add_regulator((features & TWL4030_VAUX2)
884 					? TWL4030_REG_VAUX2_4030
885 					: TWL4030_REG_VAUX2,
886 				pdata->vaux2, features);
887 		if (IS_ERR(child))
888 			return PTR_ERR(child);
889 
890 		child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
891 					features);
892 		if (IS_ERR(child))
893 			return PTR_ERR(child);
894 
895 		child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
896 					features);
897 		if (IS_ERR(child))
898 			return PTR_ERR(child);
899 
900 		child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
901 					features);
902 		if (IS_ERR(child))
903 			return PTR_ERR(child);
904 	}
905 
906 	/* maybe add LDOs that are omitted on cost-reduced parts */
907 	if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
908 	  && twl_class_is_4030()) {
909 		child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
910 					features);
911 		if (IS_ERR(child))
912 			return PTR_ERR(child);
913 
914 		child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
915 					features);
916 		if (IS_ERR(child))
917 			return PTR_ERR(child);
918 
919 		child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
920 					features);
921 		if (IS_ERR(child))
922 			return PTR_ERR(child);
923 
924 		child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
925 					features);
926 		if (IS_ERR(child))
927 			return PTR_ERR(child);
928 
929 		child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
930 					features);
931 		if (IS_ERR(child))
932 			return PTR_ERR(child);
933 
934 		child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
935 					features);
936 		if (IS_ERR(child))
937 			return PTR_ERR(child);
938 	}
939 
940 	if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
941 			!(features & (TPS_SUBSET | TWL5031))) {
942 		child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
943 				pdata->bci, sizeof(*pdata->bci), false,
944 				/* irq0 = CHG_PRES, irq1 = BCI */
945 				irq_base + BCI_PRES_INTR_OFFSET,
946 				irq_base + BCI_INTR_OFFSET);
947 		if (IS_ERR(child))
948 			return PTR_ERR(child);
949 	}
950 
951 	if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) {
952 		child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power",
953 				  pdata->power, sizeof(*pdata->power), false,
954 				  0, 0);
955 		if (IS_ERR(child))
956 			return PTR_ERR(child);
957 	}
958 
959 	return 0;
960 }
961 
962 /*----------------------------------------------------------------------*/
963 
964 /*
965  * These three functions initialize the on-chip clock framework,
966  * letting it generate the right frequencies for USB, MADC, and
967  * other purposes.
968  */
protect_pm_master(void)969 static inline int protect_pm_master(void)
970 {
971 	int e = 0;
972 
973 	e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
974 			     TWL4030_PM_MASTER_PROTECT_KEY);
975 	return e;
976 }
977 
unprotect_pm_master(void)978 static inline int unprotect_pm_master(void)
979 {
980 	int e = 0;
981 
982 	e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
983 			      TWL4030_PM_MASTER_PROTECT_KEY);
984 	e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
985 			      TWL4030_PM_MASTER_PROTECT_KEY);
986 
987 	return e;
988 }
989 
clocks_init(struct device * dev,struct twl4030_clock_init_data * clock)990 static void clocks_init(struct device *dev,
991 			struct twl4030_clock_init_data *clock)
992 {
993 	int e = 0;
994 	struct clk *osc;
995 	u32 rate;
996 	u8 ctrl = HFCLK_FREQ_26_MHZ;
997 
998 	osc = clk_get(dev, "fck");
999 	if (IS_ERR(osc)) {
1000 		printk(KERN_WARNING "Skipping twl internal clock init and "
1001 				"using bootloader value (unknown osc rate)\n");
1002 		return;
1003 	}
1004 
1005 	rate = clk_get_rate(osc);
1006 	clk_put(osc);
1007 
1008 	switch (rate) {
1009 	case 19200000:
1010 		ctrl = HFCLK_FREQ_19p2_MHZ;
1011 		break;
1012 	case 26000000:
1013 		ctrl = HFCLK_FREQ_26_MHZ;
1014 		break;
1015 	case 38400000:
1016 		ctrl = HFCLK_FREQ_38p4_MHZ;
1017 		break;
1018 	}
1019 
1020 	ctrl |= HIGH_PERF_SQ;
1021 	if (clock && clock->ck32k_lowpwr_enable)
1022 		ctrl |= CK32K_LOWPWR_EN;
1023 
1024 	e |= unprotect_pm_master();
1025 	/* effect->MADC+USB ck en */
1026 	e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1027 	e |= protect_pm_master();
1028 
1029 	if (e < 0)
1030 		pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1031 }
1032 
1033 /*----------------------------------------------------------------------*/
1034 
1035 
twl_remove(struct i2c_client * client)1036 static int twl_remove(struct i2c_client *client)
1037 {
1038 	unsigned i, num_slaves;
1039 
1040 	if (twl_class_is_4030())
1041 		twl4030_exit_irq();
1042 	else
1043 		twl6030_exit_irq();
1044 
1045 	num_slaves = twl_get_num_slaves();
1046 	for (i = 0; i < num_slaves; i++) {
1047 		struct twl_client	*twl = &twl_priv->twl_modules[i];
1048 
1049 		if (twl->client && twl->client != client)
1050 			i2c_unregister_device(twl->client);
1051 		twl->client = NULL;
1052 	}
1053 	twl_priv->ready = false;
1054 	return 0;
1055 }
1056 
1057 static struct of_dev_auxdata twl_auxdata_lookup[] = {
1058 	OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
1059 	{ /* sentinel */ },
1060 };
1061 
1062 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1063 static int
twl_probe(struct i2c_client * client,const struct i2c_device_id * id)1064 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1065 {
1066 	struct twl4030_platform_data	*pdata = dev_get_platdata(&client->dev);
1067 	struct device_node		*node = client->dev.of_node;
1068 	struct platform_device		*pdev;
1069 	const struct regmap_config	*twl_regmap_config;
1070 	int				irq_base = 0;
1071 	int				status;
1072 	unsigned			i, num_slaves;
1073 
1074 	if (!node && !pdata) {
1075 		dev_err(&client->dev, "no platform data\n");
1076 		return -EINVAL;
1077 	}
1078 
1079 	if (twl_priv) {
1080 		dev_dbg(&client->dev, "only one instance of %s allowed\n",
1081 			DRIVER_NAME);
1082 		return -EBUSY;
1083 	}
1084 
1085 	pdev = platform_device_alloc(DRIVER_NAME, -1);
1086 	if (!pdev) {
1087 		dev_err(&client->dev, "can't alloc pdev\n");
1088 		return -ENOMEM;
1089 	}
1090 
1091 	status = platform_device_add(pdev);
1092 	if (status) {
1093 		platform_device_put(pdev);
1094 		return status;
1095 	}
1096 
1097 	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1098 		dev_dbg(&client->dev, "can't talk I2C?\n");
1099 		status = -EIO;
1100 		goto free;
1101 	}
1102 
1103 	twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
1104 				GFP_KERNEL);
1105 	if (!twl_priv) {
1106 		status = -ENOMEM;
1107 		goto free;
1108 	}
1109 
1110 	if ((id->driver_data) & TWL6030_CLASS) {
1111 		twl_priv->twl_id = TWL6030_CLASS_ID;
1112 		twl_priv->twl_map = &twl6030_map[0];
1113 		/* The charger base address is different in twl6032 */
1114 		if ((id->driver_data) & TWL6032_SUBCLASS)
1115 			twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base =
1116 							TWL6032_BASEADD_CHARGER;
1117 		twl_regmap_config = twl6030_regmap_config;
1118 	} else {
1119 		twl_priv->twl_id = TWL4030_CLASS_ID;
1120 		twl_priv->twl_map = &twl4030_map[0];
1121 		twl_regmap_config = twl4030_regmap_config;
1122 	}
1123 
1124 	num_slaves = twl_get_num_slaves();
1125 	twl_priv->twl_modules = devm_kcalloc(&client->dev,
1126 					 num_slaves,
1127 					 sizeof(struct twl_client),
1128 					 GFP_KERNEL);
1129 	if (!twl_priv->twl_modules) {
1130 		status = -ENOMEM;
1131 		goto free;
1132 	}
1133 
1134 	for (i = 0; i < num_slaves; i++) {
1135 		struct twl_client *twl = &twl_priv->twl_modules[i];
1136 
1137 		if (i == 0) {
1138 			twl->client = client;
1139 		} else {
1140 			twl->client = i2c_new_dummy_device(client->adapter,
1141 						    client->addr + i);
1142 			if (IS_ERR(twl->client)) {
1143 				dev_err(&client->dev,
1144 					"can't attach client %d\n", i);
1145 				status = PTR_ERR(twl->client);
1146 				goto fail;
1147 			}
1148 		}
1149 
1150 		twl->regmap = devm_regmap_init_i2c(twl->client,
1151 						   &twl_regmap_config[i]);
1152 		if (IS_ERR(twl->regmap)) {
1153 			status = PTR_ERR(twl->regmap);
1154 			dev_err(&client->dev,
1155 				"Failed to allocate regmap %d, err: %d\n", i,
1156 				status);
1157 			goto fail;
1158 		}
1159 	}
1160 
1161 	twl_priv->ready = true;
1162 
1163 	/* setup clock framework */
1164 	clocks_init(&client->dev, pdata ? pdata->clock : NULL);
1165 
1166 	/* read TWL IDCODE Register */
1167 	if (twl_class_is_4030()) {
1168 		status = twl_read_idcode_register();
1169 		WARN(status < 0, "Error: reading twl_idcode register value\n");
1170 	}
1171 
1172 	/* Maybe init the T2 Interrupt subsystem */
1173 	if (client->irq) {
1174 		if (twl_class_is_4030()) {
1175 			twl4030_init_chip_irq(id->name);
1176 			irq_base = twl4030_init_irq(&client->dev, client->irq);
1177 		} else {
1178 			irq_base = twl6030_init_irq(&client->dev, client->irq);
1179 		}
1180 
1181 		if (irq_base < 0) {
1182 			status = irq_base;
1183 			goto fail;
1184 		}
1185 	}
1186 
1187 	/*
1188 	 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1189 	 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1190 	 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1191 	 *
1192 	 * Also, always enable SmartReflex bit as that's needed for omaps to
1193 	 * to do anything over I2C4 for voltage scaling even if SmartReflex
1194 	 * is disabled. Without the SmartReflex bit omap sys_clkreq idle
1195 	 * signal will never trigger for retention idle.
1196 	 */
1197 	if (twl_class_is_4030()) {
1198 		u8 temp;
1199 
1200 		twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1201 		temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1202 			I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1203 		twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1204 
1205 		twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
1206 				TWL4030_DCDC_GLOBAL_CFG);
1207 		temp |= SMARTREFLEX_ENABLE;
1208 		twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
1209 				 TWL4030_DCDC_GLOBAL_CFG);
1210 	}
1211 
1212 	if (node) {
1213 		if (pdata)
1214 			twl_auxdata_lookup[0].platform_data = pdata->gpio;
1215 		status = of_platform_populate(node, NULL, twl_auxdata_lookup,
1216 					      &client->dev);
1217 	} else {
1218 		status = add_children(pdata, irq_base, id->driver_data);
1219 	}
1220 
1221 fail:
1222 	if (status < 0)
1223 		twl_remove(client);
1224 free:
1225 	if (status < 0)
1226 		platform_device_unregister(pdev);
1227 
1228 	return status;
1229 }
1230 
twl_suspend(struct device * dev)1231 static int __maybe_unused twl_suspend(struct device *dev)
1232 {
1233 	struct i2c_client *client = to_i2c_client(dev);
1234 
1235 	if (client->irq)
1236 		disable_irq(client->irq);
1237 
1238 	return 0;
1239 }
1240 
twl_resume(struct device * dev)1241 static int __maybe_unused twl_resume(struct device *dev)
1242 {
1243 	struct i2c_client *client = to_i2c_client(dev);
1244 
1245 	if (client->irq)
1246 		enable_irq(client->irq);
1247 
1248 	return 0;
1249 }
1250 
1251 static SIMPLE_DEV_PM_OPS(twl_dev_pm_ops, twl_suspend, twl_resume);
1252 
1253 static const struct i2c_device_id twl_ids[] = {
1254 	{ "twl4030", TWL4030_VAUX2 },	/* "Triton 2" */
1255 	{ "twl5030", 0 },		/* T2 updated */
1256 	{ "twl5031", TWL5031 },		/* TWL5030 updated */
1257 	{ "tps65950", 0 },		/* catalog version of twl5030 */
1258 	{ "tps65930", TPS_SUBSET },	/* fewer LDOs and DACs; no charger */
1259 	{ "tps65920", TPS_SUBSET },	/* fewer LDOs; no codec or charger */
1260 	{ "tps65921", TPS_SUBSET },	/* fewer LDOs; no codec, no LED
1261 					   and vibrator. Charger in USB module*/
1262 	{ "twl6030", TWL6030_CLASS },	/* "Phoenix power chip" */
1263 	{ "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
1264 	{ /* end of list */ },
1265 };
1266 
1267 /* One Client Driver , 4 Clients */
1268 static struct i2c_driver twl_driver = {
1269 	.driver.name	= DRIVER_NAME,
1270 	.driver.pm	= &twl_dev_pm_ops,
1271 	.id_table	= twl_ids,
1272 	.probe		= twl_probe,
1273 	.remove		= twl_remove,
1274 };
1275 builtin_i2c_driver(twl_driver);
1276