1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Split TWL6030 logic from twl-regulator.c:
4  * Copyright (C) 2008 David Brownell
5  *
6  * Copyright (C) 2016 Nicolae Rosia <nicolae.rosia@gmail.com>
7  */
8 
9 #include <linux/module.h>
10 #include <linux/string.h>
11 #include <linux/slab.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/platform_device.h>
15 #include <linux/of.h>
16 #include <linux/regulator/driver.h>
17 #include <linux/regulator/machine.h>
18 #include <linux/regulator/of_regulator.h>
19 #include <linux/mfd/twl.h>
20 #include <linux/delay.h>
21 
22 struct twlreg_info {
23 	/* start of regulator's PM_RECEIVER control register bank */
24 	u8			base;
25 
26 	/* twl resource ID, for resource control state machine */
27 	u8			id;
28 
29 	u8			flags;
30 
31 	/* used by regulator core */
32 	struct regulator_desc	desc;
33 
34 	/* chip specific features */
35 	unsigned long		features;
36 
37 	/* data passed from board for external get/set voltage */
38 	void			*data;
39 };
40 
41 
42 /* LDO control registers ... offset is from the base of its register bank.
43  * The first three registers of all power resource banks help hardware to
44  * manage the various resource groups.
45  */
46 /* Common offset in TWL4030/6030 */
47 #define VREG_GRP		0
48 /* TWL6030 register offsets */
49 #define VREG_TRANS		1
50 #define VREG_STATE		2
51 #define VREG_VOLTAGE		3
52 #define VREG_VOLTAGE_SMPS	4
53 /* TWL6030 Misc register offsets */
54 #define VREG_BC_ALL		1
55 #define VREG_BC_REF		2
56 #define VREG_BC_PROC		3
57 #define VREG_BC_CLK_RST		4
58 
59 /* TWL6030 LDO register values for VREG_VOLTAGE */
60 #define TWL6030_VREG_VOLTAGE_WR_S   BIT(7)
61 
62 /* TWL6030 LDO register values for CFG_STATE */
63 #define TWL6030_CFG_STATE_OFF	0x00
64 #define TWL6030_CFG_STATE_ON	0x01
65 #define TWL6030_CFG_STATE_OFF2	0x02
66 #define TWL6030_CFG_STATE_SLEEP	0x03
67 #define TWL6030_CFG_STATE_GRP_SHIFT	5
68 #define TWL6030_CFG_STATE_APP_SHIFT	2
69 #define TWL6030_CFG_STATE_MASK		0x03
70 #define TWL6030_CFG_STATE_APP_MASK	(0x03 << TWL6030_CFG_STATE_APP_SHIFT)
71 #define TWL6030_CFG_STATE_APP(v)	(((v) & TWL6030_CFG_STATE_APP_MASK) >>\
72 						TWL6030_CFG_STATE_APP_SHIFT)
73 
74 /* Flags for SMPS Voltage reading and LDO reading*/
75 #define SMPS_OFFSET_EN		BIT(0)
76 #define SMPS_EXTENDED_EN	BIT(1)
77 #define TWL_6030_WARM_RESET	BIT(3)
78 
79 /* twl6032 SMPS EPROM values */
80 #define TWL6030_SMPS_OFFSET		0xB0
81 #define TWL6030_SMPS_MULT		0xB3
82 #define SMPS_MULTOFFSET_SMPS4	BIT(0)
83 #define SMPS_MULTOFFSET_VIO	BIT(1)
84 #define SMPS_MULTOFFSET_SMPS3	BIT(6)
85 
86 static inline int
87 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
88 {
89 	u8 value;
90 	int status;
91 
92 	status = twl_i2c_read_u8(slave_subgp,
93 			&value, info->base + offset);
94 	return (status < 0) ? status : value;
95 }
96 
97 static inline int
98 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
99 						 u8 value)
100 {
101 	return twl_i2c_write_u8(slave_subgp,
102 			value, info->base + offset);
103 }
104 
105 /* generic power resource operations, which work on all regulators */
106 static int twlreg_grp(struct regulator_dev *rdev)
107 {
108 	return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
109 								 VREG_GRP);
110 }
111 
112 /*
113  * Enable/disable regulators by joining/leaving the P1 (processor) group.
114  * We assume nobody else is updating the DEV_GRP registers.
115  */
116 /* definition for 6030 family */
117 #define P3_GRP_6030	BIT(2)		/* secondary processor, modem, etc */
118 #define P2_GRP_6030	BIT(1)		/* "peripherals" */
119 #define P1_GRP_6030	BIT(0)		/* CPU/Linux */
120 
121 static int twl6030reg_is_enabled(struct regulator_dev *rdev)
122 {
123 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
124 	int			grp = 0, val;
125 
126 	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS))) {
127 		grp = twlreg_grp(rdev);
128 		if (grp < 0)
129 			return grp;
130 		grp &= P1_GRP_6030;
131 		val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
132 		val = TWL6030_CFG_STATE_APP(val);
133 	} else {
134 		val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
135 		val &= TWL6030_CFG_STATE_MASK;
136 		grp = 1;
137 	}
138 
139 	return grp && (val == TWL6030_CFG_STATE_ON);
140 }
141 
142 #define PB_I2C_BUSY	BIT(0)
143 #define PB_I2C_BWEN	BIT(1)
144 
145 
146 static int twl6030reg_enable(struct regulator_dev *rdev)
147 {
148 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
149 	int			grp = 0;
150 	int			ret;
151 
152 	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
153 		grp = twlreg_grp(rdev);
154 	if (grp < 0)
155 		return grp;
156 
157 	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
158 			grp << TWL6030_CFG_STATE_GRP_SHIFT |
159 			TWL6030_CFG_STATE_ON);
160 	return ret;
161 }
162 
163 static int twl6030reg_disable(struct regulator_dev *rdev)
164 {
165 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
166 	int			grp = 0;
167 	int			ret;
168 
169 	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
170 		grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
171 
172 	/* For 6030, set the off state for all grps enabled */
173 	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
174 			(grp) << TWL6030_CFG_STATE_GRP_SHIFT |
175 			TWL6030_CFG_STATE_OFF);
176 
177 	return ret;
178 }
179 
180 static int twl6030reg_get_status(struct regulator_dev *rdev)
181 {
182 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
183 	int			val;
184 
185 	val = twlreg_grp(rdev);
186 	if (val < 0)
187 		return val;
188 
189 	val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
190 
191 	if (info->features & TWL6032_SUBCLASS)
192 		val &= TWL6030_CFG_STATE_MASK;
193 	else
194 		val = TWL6030_CFG_STATE_APP(val);
195 
196 	switch (val) {
197 	case TWL6030_CFG_STATE_ON:
198 		return REGULATOR_STATUS_NORMAL;
199 
200 	case TWL6030_CFG_STATE_SLEEP:
201 		return REGULATOR_STATUS_STANDBY;
202 
203 	case TWL6030_CFG_STATE_OFF:
204 	case TWL6030_CFG_STATE_OFF2:
205 	default:
206 		break;
207 	}
208 
209 	return REGULATOR_STATUS_OFF;
210 }
211 
212 static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
213 {
214 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
215 	int grp = 0;
216 	int val;
217 
218 	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
219 		grp = twlreg_grp(rdev);
220 
221 	if (grp < 0)
222 		return grp;
223 
224 	/* Compose the state register settings */
225 	val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
226 	/* We can only set the mode through state machine commands... */
227 	switch (mode) {
228 	case REGULATOR_MODE_NORMAL:
229 		val |= TWL6030_CFG_STATE_ON;
230 		break;
231 	case REGULATOR_MODE_STANDBY:
232 		val |= TWL6030_CFG_STATE_SLEEP;
233 		break;
234 
235 	default:
236 		return -EINVAL;
237 	}
238 
239 	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
240 }
241 
242 static int twl6030coresmps_set_voltage(struct regulator_dev *rdev, int min_uV,
243 	int max_uV, unsigned *selector)
244 {
245 	return -ENODEV;
246 }
247 
248 static int twl6030coresmps_get_voltage(struct regulator_dev *rdev)
249 {
250 	return -ENODEV;
251 }
252 
253 static const struct regulator_ops twl6030coresmps_ops = {
254 	.set_voltage	= twl6030coresmps_set_voltage,
255 	.get_voltage	= twl6030coresmps_get_voltage,
256 };
257 
258 static int
259 twl6030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
260 {
261 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
262 
263 	if (info->flags & TWL_6030_WARM_RESET)
264 		selector |= TWL6030_VREG_VOLTAGE_WR_S;
265 
266 	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
267 			    selector);
268 }
269 
270 static int twl6030ldo_get_voltage_sel(struct regulator_dev *rdev)
271 {
272 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
273 	int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
274 
275 	if (info->flags & TWL_6030_WARM_RESET)
276 		vsel &= ~TWL6030_VREG_VOLTAGE_WR_S;
277 
278 	return vsel;
279 }
280 
281 static const struct regulator_ops twl6030ldo_ops = {
282 	.list_voltage	= regulator_list_voltage_linear_range,
283 
284 	.set_voltage_sel = twl6030ldo_set_voltage_sel,
285 	.get_voltage_sel = twl6030ldo_get_voltage_sel,
286 
287 	.enable		= twl6030reg_enable,
288 	.disable	= twl6030reg_disable,
289 	.is_enabled	= twl6030reg_is_enabled,
290 
291 	.set_mode	= twl6030reg_set_mode,
292 
293 	.get_status	= twl6030reg_get_status,
294 };
295 
296 static const struct regulator_ops twl6030fixed_ops = {
297 	.list_voltage	= regulator_list_voltage_linear,
298 
299 	.enable		= twl6030reg_enable,
300 	.disable	= twl6030reg_disable,
301 	.is_enabled	= twl6030reg_is_enabled,
302 
303 	.set_mode	= twl6030reg_set_mode,
304 
305 	.get_status	= twl6030reg_get_status,
306 };
307 
308 /*
309  * SMPS status and control
310  */
311 
312 static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
313 {
314 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
315 
316 	int voltage = 0;
317 
318 	switch (info->flags) {
319 	case SMPS_OFFSET_EN:
320 		voltage = 100000;
321 		fallthrough;
322 	case 0:
323 		switch (index) {
324 		case 0:
325 			voltage = 0;
326 			break;
327 		case 58:
328 			voltage = 1350 * 1000;
329 			break;
330 		case 59:
331 			voltage = 1500 * 1000;
332 			break;
333 		case 60:
334 			voltage = 1800 * 1000;
335 			break;
336 		case 61:
337 			voltage = 1900 * 1000;
338 			break;
339 		case 62:
340 			voltage = 2100 * 1000;
341 			break;
342 		default:
343 			voltage += (600000 + (12500 * (index - 1)));
344 		}
345 		break;
346 	case SMPS_EXTENDED_EN:
347 		switch (index) {
348 		case 0:
349 			voltage = 0;
350 			break;
351 		case 58:
352 			voltage = 2084 * 1000;
353 			break;
354 		case 59:
355 			voltage = 2315 * 1000;
356 			break;
357 		case 60:
358 			voltage = 2778 * 1000;
359 			break;
360 		case 61:
361 			voltage = 2932 * 1000;
362 			break;
363 		case 62:
364 			voltage = 3241 * 1000;
365 			break;
366 		default:
367 			voltage = (1852000 + (38600 * (index - 1)));
368 		}
369 		break;
370 	case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
371 		switch (index) {
372 		case 0:
373 			voltage = 0;
374 			break;
375 		case 58:
376 			voltage = 4167 * 1000;
377 			break;
378 		case 59:
379 			voltage = 2315 * 1000;
380 			break;
381 		case 60:
382 			voltage = 2778 * 1000;
383 			break;
384 		case 61:
385 			voltage = 2932 * 1000;
386 			break;
387 		case 62:
388 			voltage = 3241 * 1000;
389 			break;
390 		default:
391 			voltage = (2161000 + (38600 * (index - 1)));
392 		}
393 		break;
394 	}
395 
396 	return voltage;
397 }
398 
399 static int twl6030smps_map_voltage(struct regulator_dev *rdev, int min_uV,
400 				   int max_uV)
401 {
402 	struct twlreg_info *info = rdev_get_drvdata(rdev);
403 	int vsel = 0;
404 
405 	switch (info->flags) {
406 	case 0:
407 		if (min_uV == 0)
408 			vsel = 0;
409 		else if ((min_uV >= 600000) && (min_uV <= 1300000)) {
410 			vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
411 			vsel++;
412 		}
413 		/* Values 1..57 for vsel are linear and can be calculated
414 		 * values 58..62 are non linear.
415 		 */
416 		else if ((min_uV > 1900000) && (min_uV <= 2100000))
417 			vsel = 62;
418 		else if ((min_uV > 1800000) && (min_uV <= 1900000))
419 			vsel = 61;
420 		else if ((min_uV > 1500000) && (min_uV <= 1800000))
421 			vsel = 60;
422 		else if ((min_uV > 1350000) && (min_uV <= 1500000))
423 			vsel = 59;
424 		else if ((min_uV > 1300000) && (min_uV <= 1350000))
425 			vsel = 58;
426 		else
427 			return -EINVAL;
428 		break;
429 	case SMPS_OFFSET_EN:
430 		if (min_uV == 0)
431 			vsel = 0;
432 		else if ((min_uV >= 700000) && (min_uV <= 1420000)) {
433 			vsel = DIV_ROUND_UP(min_uV - 700000, 12500);
434 			vsel++;
435 		}
436 		/* Values 1..57 for vsel are linear and can be calculated
437 		 * values 58..62 are non linear.
438 		 */
439 		else if ((min_uV > 1900000) && (min_uV <= 2100000))
440 			vsel = 62;
441 		else if ((min_uV > 1800000) && (min_uV <= 1900000))
442 			vsel = 61;
443 		else if ((min_uV > 1500000) && (min_uV <= 1800000))
444 			vsel = 60;
445 		else if ((min_uV > 1350000) && (min_uV <= 1500000))
446 			vsel = 59;
447 		else
448 			return -EINVAL;
449 		break;
450 	case SMPS_EXTENDED_EN:
451 		if (min_uV == 0) {
452 			vsel = 0;
453 		} else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
454 			vsel = DIV_ROUND_UP(min_uV - 1852000, 38600);
455 			vsel++;
456 		}
457 		break;
458 	case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
459 		if (min_uV == 0) {
460 			vsel = 0;
461 		} else if ((min_uV >= 2161000) && (min_uV <= 4321000)) {
462 			vsel = DIV_ROUND_UP(min_uV - 2161000, 38600);
463 			vsel++;
464 		}
465 		break;
466 	}
467 
468 	return vsel;
469 }
470 
471 static int twl6030smps_set_voltage_sel(struct regulator_dev *rdev,
472 				       unsigned int selector)
473 {
474 	struct twlreg_info *info = rdev_get_drvdata(rdev);
475 
476 	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
477 			    selector);
478 }
479 
480 static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
481 {
482 	struct twlreg_info	*info = rdev_get_drvdata(rdev);
483 
484 	return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
485 }
486 
487 static const struct regulator_ops twlsmps_ops = {
488 	.list_voltage		= twl6030smps_list_voltage,
489 	.map_voltage		= twl6030smps_map_voltage,
490 
491 	.set_voltage_sel	= twl6030smps_set_voltage_sel,
492 	.get_voltage_sel	= twl6030smps_get_voltage_sel,
493 
494 	.enable			= twl6030reg_enable,
495 	.disable		= twl6030reg_disable,
496 	.is_enabled		= twl6030reg_is_enabled,
497 
498 	.set_mode		= twl6030reg_set_mode,
499 
500 	.get_status		= twl6030reg_get_status,
501 };
502 
503 /*----------------------------------------------------------------------*/
504 static const struct linear_range twl6030ldo_linear_range[] = {
505 	REGULATOR_LINEAR_RANGE(0, 0, 0, 0),
506 	REGULATOR_LINEAR_RANGE(1000000, 1, 24, 100000),
507 	REGULATOR_LINEAR_RANGE(2750000, 31, 31, 0),
508 };
509 
510 #define TWL6030_ADJUSTABLE_SMPS(label) \
511 static const struct twlreg_info TWL6030_INFO_##label = { \
512 	.desc = { \
513 		.name = #label, \
514 		.id = TWL6030_REG_##label, \
515 		.ops = &twl6030coresmps_ops, \
516 		.type = REGULATOR_VOLTAGE, \
517 		.owner = THIS_MODULE, \
518 		}, \
519 	}
520 
521 #define TWL6030_ADJUSTABLE_LDO(label, offset) \
522 static const struct twlreg_info TWL6030_INFO_##label = { \
523 	.base = offset, \
524 	.desc = { \
525 		.name = #label, \
526 		.id = TWL6030_REG_##label, \
527 		.n_voltages = 32, \
528 		.linear_ranges = twl6030ldo_linear_range, \
529 		.n_linear_ranges = ARRAY_SIZE(twl6030ldo_linear_range), \
530 		.ops = &twl6030ldo_ops, \
531 		.type = REGULATOR_VOLTAGE, \
532 		.owner = THIS_MODULE, \
533 		}, \
534 	}
535 
536 #define TWL6032_ADJUSTABLE_LDO(label, offset) \
537 static const struct twlreg_info TWL6032_INFO_##label = { \
538 	.base = offset, \
539 	.features = TWL6032_SUBCLASS, \
540 	.desc = { \
541 		.name = #label, \
542 		.id = TWL6032_REG_##label, \
543 		.n_voltages = 32, \
544 		.linear_ranges = twl6030ldo_linear_range, \
545 		.n_linear_ranges = ARRAY_SIZE(twl6030ldo_linear_range), \
546 		.ops = &twl6030ldo_ops, \
547 		.type = REGULATOR_VOLTAGE, \
548 		.owner = THIS_MODULE, \
549 		}, \
550 	}
551 
552 #define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
553 static const struct twlreg_info TWLFIXED_INFO_##label = { \
554 	.base = offset, \
555 	.id = 0, \
556 	.desc = { \
557 		.name = #label, \
558 		.id = TWL6030##_REG_##label, \
559 		.n_voltages = 1, \
560 		.ops = &twl6030fixed_ops, \
561 		.type = REGULATOR_VOLTAGE, \
562 		.owner = THIS_MODULE, \
563 		.min_uV = mVolts * 1000, \
564 		.enable_time = turnon_delay, \
565 		.of_map_mode = NULL, \
566 		}, \
567 	}
568 
569 #define TWL6032_ADJUSTABLE_SMPS(label, offset) \
570 static const struct twlreg_info TWLSMPS_INFO_##label = { \
571 	.base = offset, \
572 	.features = TWL6032_SUBCLASS, \
573 	.desc = { \
574 		.name = #label, \
575 		.id = TWL6032_REG_##label, \
576 		.n_voltages = 63, \
577 		.ops = &twlsmps_ops, \
578 		.type = REGULATOR_VOLTAGE, \
579 		.owner = THIS_MODULE, \
580 		}, \
581 	}
582 
583 /* VUSBCP is managed *only* by the USB subchip */
584 /* 6030 REG with base as PMC Slave Misc : 0x0030 */
585 /* Turnon-delay and remap configuration values for 6030 are not
586    verified since the specification is not public */
587 TWL6030_ADJUSTABLE_SMPS(VDD1);
588 TWL6030_ADJUSTABLE_SMPS(VDD2);
589 TWL6030_ADJUSTABLE_SMPS(VDD3);
590 TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54);
591 TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58);
592 TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c);
593 TWL6030_ADJUSTABLE_LDO(VMMC, 0x68);
594 TWL6030_ADJUSTABLE_LDO(VPP, 0x6c);
595 TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74);
596 /* 6025 are renamed compared to 6030 versions */
597 TWL6032_ADJUSTABLE_LDO(LDO2, 0x54);
598 TWL6032_ADJUSTABLE_LDO(LDO4, 0x58);
599 TWL6032_ADJUSTABLE_LDO(LDO3, 0x5c);
600 TWL6032_ADJUSTABLE_LDO(LDO5, 0x68);
601 TWL6032_ADJUSTABLE_LDO(LDO1, 0x6c);
602 TWL6032_ADJUSTABLE_LDO(LDO7, 0x74);
603 TWL6032_ADJUSTABLE_LDO(LDO6, 0x60);
604 TWL6032_ADJUSTABLE_LDO(LDOLN, 0x64);
605 TWL6032_ADJUSTABLE_LDO(LDOUSB, 0x70);
606 TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0);
607 TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0);
608 TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0);
609 TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0);
610 TWL6030_FIXED_LDO(V1V8, 0x16, 1800, 0);
611 TWL6030_FIXED_LDO(V2V1, 0x1c, 2100, 0);
612 TWL6032_ADJUSTABLE_SMPS(SMPS3, 0x34);
613 TWL6032_ADJUSTABLE_SMPS(SMPS4, 0x10);
614 TWL6032_ADJUSTABLE_SMPS(VIO, 0x16);
615 
616 static u8 twl_get_smps_offset(void)
617 {
618 	u8 value;
619 
620 	twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
621 			TWL6030_SMPS_OFFSET);
622 	return value;
623 }
624 
625 static u8 twl_get_smps_mult(void)
626 {
627 	u8 value;
628 
629 	twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
630 			TWL6030_SMPS_MULT);
631 	return value;
632 }
633 
634 #define TWL_OF_MATCH(comp, family, label) \
635 	{ \
636 		.compatible = comp, \
637 		.data = &family##_INFO_##label, \
638 	}
639 
640 #define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
641 #define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
642 #define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
643 #define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
644 
645 static const struct of_device_id twl_of_match[] = {
646 	TWL6030_OF_MATCH("ti,twl6030-vdd1", VDD1),
647 	TWL6030_OF_MATCH("ti,twl6030-vdd2", VDD2),
648 	TWL6030_OF_MATCH("ti,twl6030-vdd3", VDD3),
649 	TWL6030_OF_MATCH("ti,twl6030-vaux1", VAUX1_6030),
650 	TWL6030_OF_MATCH("ti,twl6030-vaux2", VAUX2_6030),
651 	TWL6030_OF_MATCH("ti,twl6030-vaux3", VAUX3_6030),
652 	TWL6030_OF_MATCH("ti,twl6030-vmmc", VMMC),
653 	TWL6030_OF_MATCH("ti,twl6030-vpp", VPP),
654 	TWL6030_OF_MATCH("ti,twl6030-vusim", VUSIM),
655 	TWL6032_OF_MATCH("ti,twl6032-ldo2", LDO2),
656 	TWL6032_OF_MATCH("ti,twl6032-ldo4", LDO4),
657 	TWL6032_OF_MATCH("ti,twl6032-ldo3", LDO3),
658 	TWL6032_OF_MATCH("ti,twl6032-ldo5", LDO5),
659 	TWL6032_OF_MATCH("ti,twl6032-ldo1", LDO1),
660 	TWL6032_OF_MATCH("ti,twl6032-ldo7", LDO7),
661 	TWL6032_OF_MATCH("ti,twl6032-ldo6", LDO6),
662 	TWL6032_OF_MATCH("ti,twl6032-ldoln", LDOLN),
663 	TWL6032_OF_MATCH("ti,twl6032-ldousb", LDOUSB),
664 	TWLFIXED_OF_MATCH("ti,twl6030-vana", VANA),
665 	TWLFIXED_OF_MATCH("ti,twl6030-vcxio", VCXIO),
666 	TWLFIXED_OF_MATCH("ti,twl6030-vdac", VDAC),
667 	TWLFIXED_OF_MATCH("ti,twl6030-vusb", VUSB),
668 	TWLFIXED_OF_MATCH("ti,twl6030-v1v8", V1V8),
669 	TWLFIXED_OF_MATCH("ti,twl6030-v2v1", V2V1),
670 	TWLSMPS_OF_MATCH("ti,twl6032-smps3", SMPS3),
671 	TWLSMPS_OF_MATCH("ti,twl6032-smps4", SMPS4),
672 	TWLSMPS_OF_MATCH("ti,twl6032-vio", VIO),
673 	{},
674 };
675 MODULE_DEVICE_TABLE(of, twl_of_match);
676 
677 static int twlreg_probe(struct platform_device *pdev)
678 {
679 	int id;
680 	struct twlreg_info		*info;
681 	const struct twlreg_info	*template;
682 	struct regulator_init_data	*initdata;
683 	struct regulation_constraints	*c;
684 	struct regulator_dev		*rdev;
685 	struct regulator_config		config = { };
686 	struct device_node		*np = pdev->dev.of_node;
687 
688 	template = of_device_get_match_data(&pdev->dev);
689 	if (!template)
690 		return -ENODEV;
691 
692 	id = template->desc.id;
693 	initdata = of_get_regulator_init_data(&pdev->dev, np, &template->desc);
694 	if (!initdata)
695 		return -EINVAL;
696 
697 	info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
698 	if (!info)
699 		return -ENOMEM;
700 
701 	/* Constrain board-specific capabilities according to what
702 	 * this driver and the chip itself can actually do.
703 	 */
704 	c = &initdata->constraints;
705 	c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
706 	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
707 				| REGULATOR_CHANGE_MODE
708 				| REGULATOR_CHANGE_STATUS;
709 
710 	switch (id) {
711 	case TWL6032_REG_SMPS3:
712 		if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
713 			info->flags |= SMPS_EXTENDED_EN;
714 		if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
715 			info->flags |= SMPS_OFFSET_EN;
716 		break;
717 	case TWL6032_REG_SMPS4:
718 		if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
719 			info->flags |= SMPS_EXTENDED_EN;
720 		if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
721 			info->flags |= SMPS_OFFSET_EN;
722 		break;
723 	case TWL6032_REG_VIO:
724 		if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
725 			info->flags |= SMPS_EXTENDED_EN;
726 		if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
727 			info->flags |= SMPS_OFFSET_EN;
728 		break;
729 	}
730 
731 	if (of_property_read_bool(np, "ti,retain-on-reset"))
732 		info->flags |= TWL_6030_WARM_RESET;
733 
734 	config.dev = &pdev->dev;
735 	config.init_data = initdata;
736 	config.driver_data = info;
737 	config.of_node = np;
738 
739 	rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
740 	if (IS_ERR(rdev)) {
741 		dev_err(&pdev->dev, "can't register %s, %ld\n",
742 				info->desc.name, PTR_ERR(rdev));
743 		return PTR_ERR(rdev);
744 	}
745 	platform_set_drvdata(pdev, rdev);
746 
747 	/* NOTE:  many regulators support short-circuit IRQs (presentable
748 	 * as REGULATOR_OVER_CURRENT notifications?) configured via:
749 	 *  - SC_CONFIG
750 	 *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
751 	 *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
752 	 *  - IT_CONFIG
753 	 */
754 
755 	return 0;
756 }
757 
758 MODULE_ALIAS("platform:twl6030_reg");
759 
760 static struct platform_driver twlreg_driver = {
761 	.probe		= twlreg_probe,
762 	/* NOTE: short name, to work around driver model truncation of
763 	 * "twl_regulator.12" (and friends) to "twl_regulator.1".
764 	 */
765 	.driver  = {
766 		.name  = "twl6030_reg",
767 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
768 		.of_match_table = of_match_ptr(twl_of_match),
769 	},
770 };
771 
772 static int __init twlreg_init(void)
773 {
774 	return platform_driver_register(&twlreg_driver);
775 }
776 subsys_initcall(twlreg_init);
777 
778 static void __exit twlreg_exit(void)
779 {
780 	platform_driver_unregister(&twlreg_driver);
781 }
782 module_exit(twlreg_exit)
783 
784 MODULE_DESCRIPTION("TWL6030 regulator driver");
785 MODULE_LICENSE("GPL");
786