1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
4 *
5 * Copyright (C) 2008 David Brownell
6 */
7
8 #include <linux/module.h>
9 #include <linux/string.h>
10 #include <linux/slab.h>
11 #include <linux/init.h>
12 #include <linux/err.h>
13 #include <linux/platform_device.h>
14 #include <linux/of.h>
15 #include <linux/of_device.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 /*
23 * The TWL4030/TW5030/TPS659x0 family chips include power management, a
24 * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
25 * include an audio codec, battery charger, and more voltage regulators.
26 * These chips are often used in OMAP-based systems.
27 *
28 * This driver implements software-based resource control for various
29 * voltage regulators. This is usually augmented with state machine
30 * based control.
31 */
32
33 struct twlreg_info {
34 /* start of regulator's PM_RECEIVER control register bank */
35 u8 base;
36
37 /* twl resource ID, for resource control state machine */
38 u8 id;
39
40 /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
41 u8 table_len;
42 const u16 *table;
43
44 /* State REMAP default configuration */
45 u8 remap;
46
47 /* used by regulator core */
48 struct regulator_desc desc;
49
50 /* chip specific features */
51 unsigned long features;
52
53 /* data passed from board for external get/set voltage */
54 void *data;
55 };
56
57
58 /* LDO control registers ... offset is from the base of its register bank.
59 * The first three registers of all power resource banks help hardware to
60 * manage the various resource groups.
61 */
62 /* Common offset in TWL4030/6030 */
63 #define VREG_GRP 0
64 /* TWL4030 register offsets */
65 #define VREG_TYPE 1
66 #define VREG_REMAP 2
67 #define VREG_DEDICATED 3 /* LDO control */
68 #define VREG_VOLTAGE_SMPS_4030 9
69 /* TWL6030 register offsets */
70 #define VREG_TRANS 1
71 #define VREG_STATE 2
72 #define VREG_VOLTAGE 3
73 #define VREG_VOLTAGE_SMPS 4
74
75 static inline int
twlreg_read(struct twlreg_info * info,unsigned slave_subgp,unsigned offset)76 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
77 {
78 u8 value;
79 int status;
80
81 status = twl_i2c_read_u8(slave_subgp,
82 &value, info->base + offset);
83 return (status < 0) ? status : value;
84 }
85
86 static inline int
twlreg_write(struct twlreg_info * info,unsigned slave_subgp,unsigned offset,u8 value)87 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
88 u8 value)
89 {
90 return twl_i2c_write_u8(slave_subgp,
91 value, info->base + offset);
92 }
93
94 /*----------------------------------------------------------------------*/
95
96 /* generic power resource operations, which work on all regulators */
97
twlreg_grp(struct regulator_dev * rdev)98 static int twlreg_grp(struct regulator_dev *rdev)
99 {
100 return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
101 VREG_GRP);
102 }
103
104 /*
105 * Enable/disable regulators by joining/leaving the P1 (processor) group.
106 * We assume nobody else is updating the DEV_GRP registers.
107 */
108 /* definition for 4030 family */
109 #define P3_GRP_4030 BIT(7) /* "peripherals" */
110 #define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
111 #define P1_GRP_4030 BIT(5) /* CPU/Linux */
112 /* definition for 6030 family */
113 #define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
114 #define P2_GRP_6030 BIT(1) /* "peripherals" */
115 #define P1_GRP_6030 BIT(0) /* CPU/Linux */
116
twl4030reg_is_enabled(struct regulator_dev * rdev)117 static int twl4030reg_is_enabled(struct regulator_dev *rdev)
118 {
119 int state = twlreg_grp(rdev);
120
121 if (state < 0)
122 return state;
123
124 return state & P1_GRP_4030;
125 }
126
127 #define PB_I2C_BUSY BIT(0)
128 #define PB_I2C_BWEN BIT(1)
129
130 /* Wait until buffer empty/ready to send a word on power bus. */
twl4030_wait_pb_ready(void)131 static int twl4030_wait_pb_ready(void)
132 {
133
134 int ret;
135 int timeout = 10;
136 u8 val;
137
138 do {
139 ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
140 TWL4030_PM_MASTER_PB_CFG);
141 if (ret < 0)
142 return ret;
143
144 if (!(val & PB_I2C_BUSY))
145 return 0;
146
147 mdelay(1);
148 timeout--;
149 } while (timeout);
150
151 return -ETIMEDOUT;
152 }
153
154 /* Send a word over the powerbus */
twl4030_send_pb_msg(unsigned msg)155 static int twl4030_send_pb_msg(unsigned msg)
156 {
157 u8 val;
158 int ret;
159
160 /* save powerbus configuration */
161 ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
162 TWL4030_PM_MASTER_PB_CFG);
163 if (ret < 0)
164 return ret;
165
166 /* Enable i2c access to powerbus */
167 ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val | PB_I2C_BWEN,
168 TWL4030_PM_MASTER_PB_CFG);
169 if (ret < 0)
170 return ret;
171
172 ret = twl4030_wait_pb_ready();
173 if (ret < 0)
174 return ret;
175
176 ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg >> 8,
177 TWL4030_PM_MASTER_PB_WORD_MSB);
178 if (ret < 0)
179 return ret;
180
181 ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg & 0xff,
182 TWL4030_PM_MASTER_PB_WORD_LSB);
183 if (ret < 0)
184 return ret;
185
186 ret = twl4030_wait_pb_ready();
187 if (ret < 0)
188 return ret;
189
190 /* Restore powerbus configuration */
191 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
192 TWL4030_PM_MASTER_PB_CFG);
193 }
194
twl4030reg_enable(struct regulator_dev * rdev)195 static int twl4030reg_enable(struct regulator_dev *rdev)
196 {
197 struct twlreg_info *info = rdev_get_drvdata(rdev);
198 int grp;
199
200 grp = twlreg_grp(rdev);
201 if (grp < 0)
202 return grp;
203
204 grp |= P1_GRP_4030;
205
206 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
207 }
208
twl4030reg_disable(struct regulator_dev * rdev)209 static int twl4030reg_disable(struct regulator_dev *rdev)
210 {
211 struct twlreg_info *info = rdev_get_drvdata(rdev);
212 int grp;
213
214 grp = twlreg_grp(rdev);
215 if (grp < 0)
216 return grp;
217
218 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
219
220 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
221 }
222
twl4030reg_get_status(struct regulator_dev * rdev)223 static int twl4030reg_get_status(struct regulator_dev *rdev)
224 {
225 int state = twlreg_grp(rdev);
226
227 if (state < 0)
228 return state;
229 state &= 0x0f;
230
231 /* assume state != WARM_RESET; we'd not be running... */
232 if (!state)
233 return REGULATOR_STATUS_OFF;
234 return (state & BIT(3))
235 ? REGULATOR_STATUS_NORMAL
236 : REGULATOR_STATUS_STANDBY;
237 }
238
twl4030reg_set_mode(struct regulator_dev * rdev,unsigned mode)239 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
240 {
241 struct twlreg_info *info = rdev_get_drvdata(rdev);
242 unsigned message;
243
244 /* We can only set the mode through state machine commands... */
245 switch (mode) {
246 case REGULATOR_MODE_NORMAL:
247 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
248 break;
249 case REGULATOR_MODE_STANDBY:
250 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
251 break;
252 default:
253 return -EINVAL;
254 }
255
256 return twl4030_send_pb_msg(message);
257 }
258
twl4030reg_map_mode(unsigned int mode)259 static inline unsigned int twl4030reg_map_mode(unsigned int mode)
260 {
261 switch (mode) {
262 case RES_STATE_ACTIVE:
263 return REGULATOR_MODE_NORMAL;
264 case RES_STATE_SLEEP:
265 return REGULATOR_MODE_STANDBY;
266 default:
267 return REGULATOR_MODE_INVALID;
268 }
269 }
270
271 /*----------------------------------------------------------------------*/
272
273 /*
274 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
275 * select field in its control register. We use tables indexed by VSEL
276 * to record voltages in milliVolts. (Accuracy is about three percent.)
277 *
278 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
279 * currently handled by listing two slightly different VAUX2 regulators,
280 * only one of which will be configured.
281 *
282 * VSEL values documented as "TI cannot support these values" are flagged
283 * in these tables as UNSUP() values; we normally won't assign them.
284 *
285 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
286 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
287 */
288 #define UNSUP_MASK 0x8000
289
290 #define UNSUP(x) (UNSUP_MASK | (x))
291 #define IS_UNSUP(info, x) \
292 ((UNSUP_MASK & (x)) && \
293 !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
294 #define LDO_MV(x) (~UNSUP_MASK & (x))
295
296
297 static const u16 VAUX1_VSEL_table[] = {
298 UNSUP(1500), UNSUP(1800), 2500, 2800,
299 3000, 3000, 3000, 3000,
300 };
301 static const u16 VAUX2_4030_VSEL_table[] = {
302 UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
303 1500, 1800, UNSUP(1850), 2500,
304 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
305 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
306 };
307 static const u16 VAUX2_VSEL_table[] = {
308 1700, 1700, 1900, 1300,
309 1500, 1800, 2000, 2500,
310 2100, 2800, 2200, 2300,
311 2400, 2400, 2400, 2400,
312 };
313 static const u16 VAUX3_VSEL_table[] = {
314 1500, 1800, 2500, 2800,
315 3000, 3000, 3000, 3000,
316 };
317 static const u16 VAUX4_VSEL_table[] = {
318 700, 1000, 1200, UNSUP(1300),
319 1500, 1800, UNSUP(1850), 2500,
320 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
321 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
322 };
323 static const u16 VMMC1_VSEL_table[] = {
324 1850, 2850, 3000, 3150,
325 };
326 static const u16 VMMC2_VSEL_table[] = {
327 UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
328 UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
329 2600, 2800, 2850, 3000,
330 3150, 3150, 3150, 3150,
331 };
332 static const u16 VPLL1_VSEL_table[] = {
333 1000, 1200, 1300, 1800,
334 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
335 };
336 static const u16 VPLL2_VSEL_table[] = {
337 700, 1000, 1200, 1300,
338 UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
339 UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
340 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
341 };
342 static const u16 VSIM_VSEL_table[] = {
343 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
344 2800, 3000, 3000, 3000,
345 };
346 static const u16 VDAC_VSEL_table[] = {
347 1200, 1300, 1800, 1800,
348 };
349 static const u16 VIO_VSEL_table[] = {
350 1800, 1850,
351 };
352 static const u16 VINTANA2_VSEL_table[] = {
353 2500, 2750,
354 };
355
356 /* 600mV to 1450mV in 12.5 mV steps */
357 static const struct linear_range VDD1_ranges[] = {
358 REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500)
359 };
360
361 /* 600mV to 1450mV in 12.5 mV steps, everything above = 1500mV */
362 static const struct linear_range VDD2_ranges[] = {
363 REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500),
364 REGULATOR_LINEAR_RANGE(1500000, 69, 69, 12500)
365 };
366
twl4030ldo_list_voltage(struct regulator_dev * rdev,unsigned index)367 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
368 {
369 struct twlreg_info *info = rdev_get_drvdata(rdev);
370 int mV = info->table[index];
371
372 return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
373 }
374
375 static int
twl4030ldo_set_voltage_sel(struct regulator_dev * rdev,unsigned selector)376 twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
377 {
378 struct twlreg_info *info = rdev_get_drvdata(rdev);
379
380 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
381 selector);
382 }
383
twl4030ldo_get_voltage_sel(struct regulator_dev * rdev)384 static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev)
385 {
386 struct twlreg_info *info = rdev_get_drvdata(rdev);
387 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
388
389 if (vsel < 0)
390 return vsel;
391
392 vsel &= info->table_len - 1;
393 return vsel;
394 }
395
396 static const struct regulator_ops twl4030ldo_ops = {
397 .list_voltage = twl4030ldo_list_voltage,
398
399 .set_voltage_sel = twl4030ldo_set_voltage_sel,
400 .get_voltage_sel = twl4030ldo_get_voltage_sel,
401
402 .enable = twl4030reg_enable,
403 .disable = twl4030reg_disable,
404 .is_enabled = twl4030reg_is_enabled,
405
406 .set_mode = twl4030reg_set_mode,
407
408 .get_status = twl4030reg_get_status,
409 };
410
411 static int
twl4030smps_set_voltage(struct regulator_dev * rdev,int min_uV,int max_uV,unsigned * selector)412 twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
413 unsigned *selector)
414 {
415 struct twlreg_info *info = rdev_get_drvdata(rdev);
416 int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
417
418 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS_4030, vsel);
419
420 return 0;
421 }
422
twl4030smps_get_voltage(struct regulator_dev * rdev)423 static int twl4030smps_get_voltage(struct regulator_dev *rdev)
424 {
425 struct twlreg_info *info = rdev_get_drvdata(rdev);
426 int vsel;
427
428 vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
429 VREG_VOLTAGE_SMPS_4030);
430
431 return vsel * 12500 + 600000;
432 }
433
434 static const struct regulator_ops twl4030smps_ops = {
435 .list_voltage = regulator_list_voltage_linear_range,
436
437 .set_voltage = twl4030smps_set_voltage,
438 .get_voltage = twl4030smps_get_voltage,
439 };
440
441 /*----------------------------------------------------------------------*/
442
443 static const struct regulator_ops twl4030fixed_ops = {
444 .list_voltage = regulator_list_voltage_linear,
445
446 .enable = twl4030reg_enable,
447 .disable = twl4030reg_disable,
448 .is_enabled = twl4030reg_is_enabled,
449
450 .set_mode = twl4030reg_set_mode,
451
452 .get_status = twl4030reg_get_status,
453 };
454
455 /*----------------------------------------------------------------------*/
456
457 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
458 static const struct twlreg_info TWL4030_INFO_##label = { \
459 .base = offset, \
460 .id = num, \
461 .table_len = ARRAY_SIZE(label##_VSEL_table), \
462 .table = label##_VSEL_table, \
463 .remap = remap_conf, \
464 .desc = { \
465 .name = #label, \
466 .id = TWL4030_REG_##label, \
467 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
468 .ops = &twl4030ldo_ops, \
469 .type = REGULATOR_VOLTAGE, \
470 .owner = THIS_MODULE, \
471 .enable_time = turnon_delay, \
472 .of_map_mode = twl4030reg_map_mode, \
473 }, \
474 }
475
476 #define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf, \
477 n_volt) \
478 static const struct twlreg_info TWL4030_INFO_##label = { \
479 .base = offset, \
480 .id = num, \
481 .remap = remap_conf, \
482 .desc = { \
483 .name = #label, \
484 .id = TWL4030_REG_##label, \
485 .ops = &twl4030smps_ops, \
486 .type = REGULATOR_VOLTAGE, \
487 .owner = THIS_MODULE, \
488 .enable_time = turnon_delay, \
489 .of_map_mode = twl4030reg_map_mode, \
490 .n_voltages = n_volt, \
491 .n_linear_ranges = ARRAY_SIZE(label ## _ranges), \
492 .linear_ranges = label ## _ranges, \
493 }, \
494 }
495
496 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
497 remap_conf) \
498 static const struct twlreg_info TWLFIXED_INFO_##label = { \
499 .base = offset, \
500 .id = num, \
501 .remap = remap_conf, \
502 .desc = { \
503 .name = #label, \
504 .id = TWL4030##_REG_##label, \
505 .n_voltages = 1, \
506 .ops = &twl4030fixed_ops, \
507 .type = REGULATOR_VOLTAGE, \
508 .owner = THIS_MODULE, \
509 .min_uV = mVolts * 1000, \
510 .enable_time = turnon_delay, \
511 .of_map_mode = twl4030reg_map_mode, \
512 }, \
513 }
514
515 /*
516 * We list regulators here if systems need some level of
517 * software control over them after boot.
518 */
519 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
520 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
521 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
522 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
523 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
524 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
525 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
526 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
527 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
528 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
529 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
530 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
531 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
532 TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08, 68);
533 TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08, 69);
534 /* VUSBCP is managed *only* by the USB subchip */
535 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
536 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
537 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
538 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
539 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
540
541 #define TWL_OF_MATCH(comp, family, label) \
542 { \
543 .compatible = comp, \
544 .data = &family##_INFO_##label, \
545 }
546
547 #define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
548 #define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
549 #define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
550 #define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
551 #define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
552
553 static const struct of_device_id twl_of_match[] = {
554 TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
555 TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
556 TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
557 TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
558 TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
559 TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
560 TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
561 TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
562 TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
563 TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
564 TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
565 TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
566 TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
567 TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
568 TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
569 TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
570 TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
571 TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
572 TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
573 TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
574 {},
575 };
576 MODULE_DEVICE_TABLE(of, twl_of_match);
577
twlreg_probe(struct platform_device * pdev)578 static int twlreg_probe(struct platform_device *pdev)
579 {
580 int id;
581 struct twlreg_info *info;
582 const struct twlreg_info *template;
583 struct regulator_init_data *initdata;
584 struct regulation_constraints *c;
585 struct regulator_dev *rdev;
586 struct regulator_config config = { };
587
588 template = of_device_get_match_data(&pdev->dev);
589 if (!template)
590 return -ENODEV;
591
592 id = template->desc.id;
593 initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
594 &template->desc);
595 if (!initdata)
596 return -EINVAL;
597
598 info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
599 if (!info)
600 return -ENOMEM;
601
602 /* Constrain board-specific capabilities according to what
603 * this driver and the chip itself can actually do.
604 */
605 c = &initdata->constraints;
606 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
607 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
608 | REGULATOR_CHANGE_MODE
609 | REGULATOR_CHANGE_STATUS;
610 switch (id) {
611 case TWL4030_REG_VIO:
612 case TWL4030_REG_VDD1:
613 case TWL4030_REG_VDD2:
614 case TWL4030_REG_VPLL1:
615 case TWL4030_REG_VINTANA1:
616 case TWL4030_REG_VINTANA2:
617 case TWL4030_REG_VINTDIG:
618 c->always_on = true;
619 break;
620 default:
621 break;
622 }
623
624 config.dev = &pdev->dev;
625 config.init_data = initdata;
626 config.driver_data = info;
627 config.of_node = pdev->dev.of_node;
628
629 rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
630 if (IS_ERR(rdev)) {
631 dev_err(&pdev->dev, "can't register %s, %ld\n",
632 info->desc.name, PTR_ERR(rdev));
633 return PTR_ERR(rdev);
634 }
635 platform_set_drvdata(pdev, rdev);
636
637 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, info->remap);
638
639 /* NOTE: many regulators support short-circuit IRQs (presentable
640 * as REGULATOR_OVER_CURRENT notifications?) configured via:
641 * - SC_CONFIG
642 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
643 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
644 * - IT_CONFIG
645 */
646
647 return 0;
648 }
649
650 MODULE_ALIAS("platform:twl4030_reg");
651
652 static struct platform_driver twlreg_driver = {
653 .probe = twlreg_probe,
654 /* NOTE: short name, to work around driver model truncation of
655 * "twl_regulator.12" (and friends) to "twl_regulator.1".
656 */
657 .driver = {
658 .name = "twl4030_reg",
659 .of_match_table = of_match_ptr(twl_of_match),
660 },
661 };
662
twlreg_init(void)663 static int __init twlreg_init(void)
664 {
665 return platform_driver_register(&twlreg_driver);
666 }
667 subsys_initcall(twlreg_init);
668
twlreg_exit(void)669 static void __exit twlreg_exit(void)
670 {
671 platform_driver_unregister(&twlreg_driver);
672 }
673 module_exit(twlreg_exit)
674
675 MODULE_DESCRIPTION("TWL4030 regulator driver");
676 MODULE_LICENSE("GPL");
677
