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1/*
2 * Regulator driver for TPS6524x PMIC
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation version 2.
9 *
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
11 * whether express or implied; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/err.h>
19#include <linux/errno.h>
20#include <linux/slab.h>
21#include <linux/spi/spi.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
24
25#define REG_LDO_SET 0x0
26#define LDO_ILIM_MASK 1 /* 0 = 400-800, 1 = 900-1500 */
27#define LDO_VSEL_MASK 0x0f
28#define LDO2_ILIM_SHIFT 12
29#define LDO2_VSEL_SHIFT 4
30#define LDO1_ILIM_SHIFT 8
31#define LDO1_VSEL_SHIFT 0
32
33#define REG_BLOCK_EN 0x1
34#define BLOCK_MASK 1
35#define BLOCK_LDO1_SHIFT 0
36#define BLOCK_LDO2_SHIFT 1
37#define BLOCK_LCD_SHIFT 2
38#define BLOCK_USB_SHIFT 3
39
40#define REG_DCDC_SET 0x2
41#define DCDC_VDCDC_MASK 0x1f
42#define DCDC_VDCDC1_SHIFT 0
43#define DCDC_VDCDC2_SHIFT 5
44#define DCDC_VDCDC3_SHIFT 10
45
46#define REG_DCDC_EN 0x3
47#define DCDCDCDC_EN_MASK 0x1
48#define DCDCDCDC1_EN_SHIFT 0
49#define DCDCDCDC1_PG_MSK BIT(1)
50#define DCDCDCDC2_EN_SHIFT 2
51#define DCDCDCDC2_PG_MSK BIT(3)
52#define DCDCDCDC3_EN_SHIFT 4
53#define DCDCDCDC3_PG_MSK BIT(5)
54
55#define REG_USB 0x4
56#define USB_ILIM_SHIFT 0
57#define USB_ILIM_MASK 0x3
58#define USB_TSD_SHIFT 2
59#define USB_TSD_MASK 0x3
60#define USB_TWARN_SHIFT 4
61#define USB_TWARN_MASK 0x3
62#define USB_IWARN_SD BIT(6)
63#define USB_FAST_LOOP BIT(7)
64
65#define REG_ALARM 0x5
66#define ALARM_LDO1 BIT(0)
67#define ALARM_DCDC1 BIT(1)
68#define ALARM_DCDC2 BIT(2)
69#define ALARM_DCDC3 BIT(3)
70#define ALARM_LDO2 BIT(4)
71#define ALARM_USB_WARN BIT(5)
72#define ALARM_USB_ALARM BIT(6)
73#define ALARM_LCD BIT(9)
74#define ALARM_TEMP_WARM BIT(10)
75#define ALARM_TEMP_HOT BIT(11)
76#define ALARM_NRST BIT(14)
77#define ALARM_POWERUP BIT(15)
78
79#define REG_INT_ENABLE 0x6
80#define INT_LDO1 BIT(0)
81#define INT_DCDC1 BIT(1)
82#define INT_DCDC2 BIT(2)
83#define INT_DCDC3 BIT(3)
84#define INT_LDO2 BIT(4)
85#define INT_USB_WARN BIT(5)
86#define INT_USB_ALARM BIT(6)
87#define INT_LCD BIT(9)
88#define INT_TEMP_WARM BIT(10)
89#define INT_TEMP_HOT BIT(11)
90#define INT_GLOBAL_EN BIT(15)
91
92#define REG_INT_STATUS 0x7
93#define STATUS_LDO1 BIT(0)
94#define STATUS_DCDC1 BIT(1)
95#define STATUS_DCDC2 BIT(2)
96#define STATUS_DCDC3 BIT(3)
97#define STATUS_LDO2 BIT(4)
98#define STATUS_USB_WARN BIT(5)
99#define STATUS_USB_ALARM BIT(6)
100#define STATUS_LCD BIT(9)
101#define STATUS_TEMP_WARM BIT(10)
102#define STATUS_TEMP_HOT BIT(11)
103
104#define REG_SOFTWARE_RESET 0xb
105#define REG_WRITE_ENABLE 0xd
106#define REG_REV_ID 0xf
107
108#define N_DCDC 3
109#define N_LDO 2
110#define N_SWITCH 2
111#define N_REGULATORS (N_DCDC + N_LDO + N_SWITCH)
112
113#define CMD_READ(reg) ((reg) << 6)
114#define CMD_WRITE(reg) (BIT(5) | (reg) << 6)
115#define STAT_CLK BIT(3)
116#define STAT_WRITE BIT(2)
117#define STAT_INVALID BIT(1)
118#define STAT_WP BIT(0)
119
120struct field {
121 int reg;
122 int shift;
123 int mask;
124};
125
126struct supply_info {
127 const char *name;
128 int n_voltages;
129 const unsigned int *voltages;
130 int n_ilimsels;
131 const unsigned int *ilimsels;
132 struct field enable, voltage, ilimsel;
133};
134
135struct tps6524x {
136 struct device *dev;
137 struct spi_device *spi;
138 struct mutex lock;
139 struct regulator_desc desc[N_REGULATORS];
140};
141
142static int __read_reg(struct tps6524x *hw, int reg)
143{
144 int error = 0;
145 u16 cmd = CMD_READ(reg), in;
146 u8 status;
147 struct spi_message m;
148 struct spi_transfer t[3];
149
150 spi_message_init(&m);
151 memset(t, 0, sizeof(t));
152
153 t[0].tx_buf = &cmd;
154 t[0].len = 2;
155 t[0].bits_per_word = 12;
156 spi_message_add_tail(&t[0], &m);
157
158 t[1].rx_buf = ∈
159 t[1].len = 2;
160 t[1].bits_per_word = 16;
161 spi_message_add_tail(&t[1], &m);
162
163 t[2].rx_buf = &status;
164 t[2].len = 1;
165 t[2].bits_per_word = 4;
166 spi_message_add_tail(&t[2], &m);
167
168 error = spi_sync(hw->spi, &m);
169 if (error < 0)
170 return error;
171
172 dev_dbg(hw->dev, "read reg %d, data %x, status %x\n",
173 reg, in, status);
174
175 if (!(status & STAT_CLK) || (status & STAT_WRITE))
176 return -EIO;
177
178 if (status & STAT_INVALID)
179 return -EINVAL;
180
181 return in;
182}
183
184static int read_reg(struct tps6524x *hw, int reg)
185{
186 int ret;
187
188 mutex_lock(&hw->lock);
189 ret = __read_reg(hw, reg);
190 mutex_unlock(&hw->lock);
191
192 return ret;
193}
194
195static int __write_reg(struct tps6524x *hw, int reg, int val)
196{
197 int error = 0;
198 u16 cmd = CMD_WRITE(reg), out = val;
199 u8 status;
200 struct spi_message m;
201 struct spi_transfer t[3];
202
203 spi_message_init(&m);
204 memset(t, 0, sizeof(t));
205
206 t[0].tx_buf = &cmd;
207 t[0].len = 2;
208 t[0].bits_per_word = 12;
209 spi_message_add_tail(&t[0], &m);
210
211 t[1].tx_buf = &out;
212 t[1].len = 2;
213 t[1].bits_per_word = 16;
214 spi_message_add_tail(&t[1], &m);
215
216 t[2].rx_buf = &status;
217 t[2].len = 1;
218 t[2].bits_per_word = 4;
219 spi_message_add_tail(&t[2], &m);
220
221 error = spi_sync(hw->spi, &m);
222 if (error < 0)
223 return error;
224
225 dev_dbg(hw->dev, "wrote reg %d, data %x, status %x\n",
226 reg, out, status);
227
228 if (!(status & STAT_CLK) || !(status & STAT_WRITE))
229 return -EIO;
230
231 if (status & (STAT_INVALID | STAT_WP))
232 return -EINVAL;
233
234 return error;
235}
236
237static int __rmw_reg(struct tps6524x *hw, int reg, int mask, int val)
238{
239 int ret;
240
241 ret = __read_reg(hw, reg);
242 if (ret < 0)
243 return ret;
244
245 ret &= ~mask;
246 ret |= val;
247
248 ret = __write_reg(hw, reg, ret);
249
250 return (ret < 0) ? ret : 0;
251}
252
253static int rmw_protect(struct tps6524x *hw, int reg, int mask, int val)
254{
255 int ret;
256
257 mutex_lock(&hw->lock);
258
259 ret = __write_reg(hw, REG_WRITE_ENABLE, 1);
260 if (ret) {
261 dev_err(hw->dev, "failed to set write enable\n");
262 goto error;
263 }
264
265 ret = __rmw_reg(hw, reg, mask, val);
266 if (ret)
267 dev_err(hw->dev, "failed to rmw register %d\n", reg);
268
269 ret = __write_reg(hw, REG_WRITE_ENABLE, 0);
270 if (ret) {
271 dev_err(hw->dev, "failed to clear write enable\n");
272 goto error;
273 }
274
275error:
276 mutex_unlock(&hw->lock);
277
278 return ret;
279}
280
281static int read_field(struct tps6524x *hw, const struct field *field)
282{
283 int tmp;
284
285 tmp = read_reg(hw, field->reg);
286 if (tmp < 0)
287 return tmp;
288
289 return (tmp >> field->shift) & field->mask;
290}
291
292static int write_field(struct tps6524x *hw, const struct field *field,
293 int val)
294{
295 if (val & ~field->mask)
296 return -EOVERFLOW;
297
298 return rmw_protect(hw, field->reg,
299 field->mask << field->shift,
300 val << field->shift);
301}
302
303static const unsigned int dcdc1_voltages[] = {
304 800000, 825000, 850000, 875000,
305 900000, 925000, 950000, 975000,
306 1000000, 1025000, 1050000, 1075000,
307 1100000, 1125000, 1150000, 1175000,
308 1200000, 1225000, 1250000, 1275000,
309 1300000, 1325000, 1350000, 1375000,
310 1400000, 1425000, 1450000, 1475000,
311 1500000, 1525000, 1550000, 1575000,
312};
313
314static const unsigned int dcdc2_voltages[] = {
315 1400000, 1450000, 1500000, 1550000,
316 1600000, 1650000, 1700000, 1750000,
317 1800000, 1850000, 1900000, 1950000,
318 2000000, 2050000, 2100000, 2150000,
319 2200000, 2250000, 2300000, 2350000,
320 2400000, 2450000, 2500000, 2550000,
321 2600000, 2650000, 2700000, 2750000,
322 2800000, 2850000, 2900000, 2950000,
323};
324
325static const unsigned int dcdc3_voltages[] = {
326 2400000, 2450000, 2500000, 2550000, 2600000,
327 2650000, 2700000, 2750000, 2800000, 2850000,
328 2900000, 2950000, 3000000, 3050000, 3100000,
329 3150000, 3200000, 3250000, 3300000, 3350000,
330 3400000, 3450000, 3500000, 3550000, 3600000,
331};
332
333static const unsigned int ldo1_voltages[] = {
334 4300000, 4350000, 4400000, 4450000,
335 4500000, 4550000, 4600000, 4650000,
336 4700000, 4750000, 4800000, 4850000,
337 4900000, 4950000, 5000000, 5050000,
338};
339
340static const unsigned int ldo2_voltages[] = {
341 1100000, 1150000, 1200000, 1250000,
342 1300000, 1700000, 1750000, 1800000,
343 1850000, 1900000, 3150000, 3200000,
344 3250000, 3300000, 3350000, 3400000,
345};
346
347static const unsigned int fixed_5000000_voltage[] = {
348 5000000
349};
350
351static const unsigned int ldo_ilimsel[] = {
352 400000, 1500000
353};
354
355static const unsigned int usb_ilimsel[] = {
356 200000, 400000, 800000, 1000000
357};
358
359static const unsigned int fixed_2400000_ilimsel[] = {
360 2400000
361};
362
363static const unsigned int fixed_1200000_ilimsel[] = {
364 1200000
365};
366
367static const unsigned int fixed_400000_ilimsel[] = {
368 400000
369};
370
371#define __MK_FIELD(_reg, _mask, _shift) \
372 { .reg = (_reg), .mask = (_mask), .shift = (_shift), }
373
374static const struct supply_info supply_info[N_REGULATORS] = {
375 {
376 .name = "DCDC1",
377 .n_voltages = ARRAY_SIZE(dcdc1_voltages),
378 .voltages = dcdc1_voltages,
379 .n_ilimsels = ARRAY_SIZE(fixed_2400000_ilimsel),
380 .ilimsels = fixed_2400000_ilimsel,
381 .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
382 DCDCDCDC1_EN_SHIFT),
383 .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
384 DCDC_VDCDC1_SHIFT),
385 },
386 {
387 .name = "DCDC2",
388 .n_voltages = ARRAY_SIZE(dcdc2_voltages),
389 .voltages = dcdc2_voltages,
390 .n_ilimsels = ARRAY_SIZE(fixed_1200000_ilimsel),
391 .ilimsels = fixed_1200000_ilimsel,
392 .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
393 DCDCDCDC2_EN_SHIFT),
394 .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
395 DCDC_VDCDC2_SHIFT),
396 },
397 {
398 .name = "DCDC3",
399 .n_voltages = ARRAY_SIZE(dcdc3_voltages),
400 .voltages = dcdc3_voltages,
401 .n_ilimsels = ARRAY_SIZE(fixed_1200000_ilimsel),
402 .ilimsels = fixed_1200000_ilimsel,
403 .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
404 DCDCDCDC3_EN_SHIFT),
405 .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
406 DCDC_VDCDC3_SHIFT),
407 },
408 {
409 .name = "LDO1",
410 .n_voltages = ARRAY_SIZE(ldo1_voltages),
411 .voltages = ldo1_voltages,
412 .n_ilimsels = ARRAY_SIZE(ldo_ilimsel),
413 .ilimsels = ldo_ilimsel,
414 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
415 BLOCK_LDO1_SHIFT),
416 .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK,
417 LDO1_VSEL_SHIFT),
418 .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK,
419 LDO1_ILIM_SHIFT),
420 },
421 {
422 .name = "LDO2",
423 .n_voltages = ARRAY_SIZE(ldo2_voltages),
424 .voltages = ldo2_voltages,
425 .n_ilimsels = ARRAY_SIZE(ldo_ilimsel),
426 .ilimsels = ldo_ilimsel,
427 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
428 BLOCK_LDO2_SHIFT),
429 .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK,
430 LDO2_VSEL_SHIFT),
431 .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK,
432 LDO2_ILIM_SHIFT),
433 },
434 {
435 .name = "USB",
436 .n_voltages = ARRAY_SIZE(fixed_5000000_voltage),
437 .voltages = fixed_5000000_voltage,
438 .n_ilimsels = ARRAY_SIZE(usb_ilimsel),
439 .ilimsels = usb_ilimsel,
440 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
441 BLOCK_USB_SHIFT),
442 .ilimsel = __MK_FIELD(REG_USB, USB_ILIM_MASK,
443 USB_ILIM_SHIFT),
444 },
445 {
446 .name = "LCD",
447 .n_voltages = ARRAY_SIZE(fixed_5000000_voltage),
448 .voltages = fixed_5000000_voltage,
449 .n_ilimsels = ARRAY_SIZE(fixed_400000_ilimsel),
450 .ilimsels = fixed_400000_ilimsel,
451 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
452 BLOCK_LCD_SHIFT),
453 },
454};
455
456static int set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
457{
458 const struct supply_info *info;
459 struct tps6524x *hw;
460
461 hw = rdev_get_drvdata(rdev);
462 info = &supply_info[rdev_get_id(rdev)];
463
464 if (rdev->desc->n_voltages == 1)
465 return -EINVAL;
466
467 return write_field(hw, &info->voltage, selector);
468}
469
470static int get_voltage_sel(struct regulator_dev *rdev)
471{
472 const struct supply_info *info;
473 struct tps6524x *hw;
474 int ret;
475
476 hw = rdev_get_drvdata(rdev);
477 info = &supply_info[rdev_get_id(rdev)];
478
479 if (rdev->desc->n_voltages == 1)
480 return 0;
481
482 ret = read_field(hw, &info->voltage);
483 if (ret < 0)
484 return ret;
485 if (WARN_ON(ret >= info->n_voltages))
486 return -EIO;
487
488 return ret;
489}
490
491static int set_current_limit(struct regulator_dev *rdev, int min_uA,
492 int max_uA)
493{
494 const struct supply_info *info;
495 struct tps6524x *hw;
496 int i;
497
498 hw = rdev_get_drvdata(rdev);
499 info = &supply_info[rdev_get_id(rdev)];
500
501 if (info->n_ilimsels == 1)
502 return -EINVAL;
503
504 for (i = info->n_ilimsels - 1; i >= 0; i--) {
505 if (min_uA <= info->ilimsels[i] &&
506 max_uA >= info->ilimsels[i])
507 return write_field(hw, &info->ilimsel, i);
508 }
509
510 return -EINVAL;
511}
512
513static int get_current_limit(struct regulator_dev *rdev)
514{
515 const struct supply_info *info;
516 struct tps6524x *hw;
517 int ret;
518
519 hw = rdev_get_drvdata(rdev);
520 info = &supply_info[rdev_get_id(rdev)];
521
522 if (info->n_ilimsels == 1)
523 return info->ilimsels[0];
524
525 ret = read_field(hw, &info->ilimsel);
526 if (ret < 0)
527 return ret;
528 if (WARN_ON(ret >= info->n_ilimsels))
529 return -EIO;
530
531 return info->ilimsels[ret];
532}
533
534static int enable_supply(struct regulator_dev *rdev)
535{
536 const struct supply_info *info;
537 struct tps6524x *hw;
538
539 hw = rdev_get_drvdata(rdev);
540 info = &supply_info[rdev_get_id(rdev)];
541
542 return write_field(hw, &info->enable, 1);
543}
544
545static int disable_supply(struct regulator_dev *rdev)
546{
547 const struct supply_info *info;
548 struct tps6524x *hw;
549
550 hw = rdev_get_drvdata(rdev);
551 info = &supply_info[rdev_get_id(rdev)];
552
553 return write_field(hw, &info->enable, 0);
554}
555
556static int is_supply_enabled(struct regulator_dev *rdev)
557{
558 const struct supply_info *info;
559 struct tps6524x *hw;
560
561 hw = rdev_get_drvdata(rdev);
562 info = &supply_info[rdev_get_id(rdev)];
563
564 return read_field(hw, &info->enable);
565}
566
567static const struct regulator_ops regulator_ops = {
568 .is_enabled = is_supply_enabled,
569 .enable = enable_supply,
570 .disable = disable_supply,
571 .get_voltage_sel = get_voltage_sel,
572 .set_voltage_sel = set_voltage_sel,
573 .list_voltage = regulator_list_voltage_table,
574 .map_voltage = regulator_map_voltage_ascend,
575 .set_current_limit = set_current_limit,
576 .get_current_limit = get_current_limit,
577};
578
579static int pmic_probe(struct spi_device *spi)
580{
581 struct tps6524x *hw;
582 struct device *dev = &spi->dev;
583 const struct supply_info *info = supply_info;
584 struct regulator_init_data *init_data;
585 struct regulator_config config = { };
586 struct regulator_dev *rdev;
587 int i;
588
589 init_data = dev_get_platdata(dev);
590 if (!init_data) {
591 dev_err(dev, "could not find regulator platform data\n");
592 return -EINVAL;
593 }
594
595 hw = devm_kzalloc(&spi->dev, sizeof(struct tps6524x), GFP_KERNEL);
596 if (!hw)
597 return -ENOMEM;
598
599 spi_set_drvdata(spi, hw);
600
601 memset(hw, 0, sizeof(struct tps6524x));
602 hw->dev = dev;
603 hw->spi = spi;
604 mutex_init(&hw->lock);
605
606 for (i = 0; i < N_REGULATORS; i++, info++, init_data++) {
607 hw->desc[i].name = info->name;
608 hw->desc[i].id = i;
609 hw->desc[i].n_voltages = info->n_voltages;
610 hw->desc[i].volt_table = info->voltages;
611 hw->desc[i].ops = ®ulator_ops;
612 hw->desc[i].type = REGULATOR_VOLTAGE;
613 hw->desc[i].owner = THIS_MODULE;
614
615 config.dev = dev;
616 config.init_data = init_data;
617 config.driver_data = hw;
618
619 rdev = devm_regulator_register(dev, &hw->desc[i], &config);
620 if (IS_ERR(rdev))
621 return PTR_ERR(rdev);
622 }
623
624 return 0;
625}
626
627static struct spi_driver pmic_driver = {
628 .probe = pmic_probe,
629 .driver = {
630 .name = "tps6524x",
631 },
632};
633
634module_spi_driver(pmic_driver);
635
636MODULE_DESCRIPTION("TPS6524X PMIC Driver");
637MODULE_AUTHOR("Cyril Chemparathy");
638MODULE_LICENSE("GPL");
639MODULE_ALIAS("spi:tps6524x");
1/*
2 * Regulator driver for TPS6524x PMIC
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation version 2.
9 *
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
11 * whether express or implied; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/err.h>
19#include <linux/errno.h>
20#include <linux/slab.h>
21#include <linux/spi/spi.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
24
25#define REG_LDO_SET 0x0
26#define LDO_ILIM_MASK 1 /* 0 = 400-800, 1 = 900-1500 */
27#define LDO_VSEL_MASK 0x0f
28#define LDO2_ILIM_SHIFT 12
29#define LDO2_VSEL_SHIFT 4
30#define LDO1_ILIM_SHIFT 8
31#define LDO1_VSEL_SHIFT 0
32
33#define REG_BLOCK_EN 0x1
34#define BLOCK_MASK 1
35#define BLOCK_LDO1_SHIFT 0
36#define BLOCK_LDO2_SHIFT 1
37#define BLOCK_LCD_SHIFT 2
38#define BLOCK_USB_SHIFT 3
39
40#define REG_DCDC_SET 0x2
41#define DCDC_VDCDC_MASK 0x1f
42#define DCDC_VDCDC1_SHIFT 0
43#define DCDC_VDCDC2_SHIFT 5
44#define DCDC_VDCDC3_SHIFT 10
45
46#define REG_DCDC_EN 0x3
47#define DCDCDCDC_EN_MASK 0x1
48#define DCDCDCDC1_EN_SHIFT 0
49#define DCDCDCDC1_PG_MSK BIT(1)
50#define DCDCDCDC2_EN_SHIFT 2
51#define DCDCDCDC2_PG_MSK BIT(3)
52#define DCDCDCDC3_EN_SHIFT 4
53#define DCDCDCDC3_PG_MSK BIT(5)
54
55#define REG_USB 0x4
56#define USB_ILIM_SHIFT 0
57#define USB_ILIM_MASK 0x3
58#define USB_TSD_SHIFT 2
59#define USB_TSD_MASK 0x3
60#define USB_TWARN_SHIFT 4
61#define USB_TWARN_MASK 0x3
62#define USB_IWARN_SD BIT(6)
63#define USB_FAST_LOOP BIT(7)
64
65#define REG_ALARM 0x5
66#define ALARM_LDO1 BIT(0)
67#define ALARM_DCDC1 BIT(1)
68#define ALARM_DCDC2 BIT(2)
69#define ALARM_DCDC3 BIT(3)
70#define ALARM_LDO2 BIT(4)
71#define ALARM_USB_WARN BIT(5)
72#define ALARM_USB_ALARM BIT(6)
73#define ALARM_LCD BIT(9)
74#define ALARM_TEMP_WARM BIT(10)
75#define ALARM_TEMP_HOT BIT(11)
76#define ALARM_NRST BIT(14)
77#define ALARM_POWERUP BIT(15)
78
79#define REG_INT_ENABLE 0x6
80#define INT_LDO1 BIT(0)
81#define INT_DCDC1 BIT(1)
82#define INT_DCDC2 BIT(2)
83#define INT_DCDC3 BIT(3)
84#define INT_LDO2 BIT(4)
85#define INT_USB_WARN BIT(5)
86#define INT_USB_ALARM BIT(6)
87#define INT_LCD BIT(9)
88#define INT_TEMP_WARM BIT(10)
89#define INT_TEMP_HOT BIT(11)
90#define INT_GLOBAL_EN BIT(15)
91
92#define REG_INT_STATUS 0x7
93#define STATUS_LDO1 BIT(0)
94#define STATUS_DCDC1 BIT(1)
95#define STATUS_DCDC2 BIT(2)
96#define STATUS_DCDC3 BIT(3)
97#define STATUS_LDO2 BIT(4)
98#define STATUS_USB_WARN BIT(5)
99#define STATUS_USB_ALARM BIT(6)
100#define STATUS_LCD BIT(9)
101#define STATUS_TEMP_WARM BIT(10)
102#define STATUS_TEMP_HOT BIT(11)
103
104#define REG_SOFTWARE_RESET 0xb
105#define REG_WRITE_ENABLE 0xd
106#define REG_REV_ID 0xf
107
108#define N_DCDC 3
109#define N_LDO 2
110#define N_SWITCH 2
111#define N_REGULATORS (N_DCDC + N_LDO + N_SWITCH)
112
113#define CMD_READ(reg) ((reg) << 6)
114#define CMD_WRITE(reg) (BIT(5) | (reg) << 6)
115#define STAT_CLK BIT(3)
116#define STAT_WRITE BIT(2)
117#define STAT_INVALID BIT(1)
118#define STAT_WP BIT(0)
119
120struct field {
121 int reg;
122 int shift;
123 int mask;
124};
125
126struct supply_info {
127 const char *name;
128 int n_voltages;
129 const unsigned int *voltages;
130 int n_ilimsels;
131 const unsigned int *ilimsels;
132 struct field enable, voltage, ilimsel;
133};
134
135struct tps6524x {
136 struct device *dev;
137 struct spi_device *spi;
138 struct mutex lock;
139 struct regulator_desc desc[N_REGULATORS];
140 struct regulator_dev *rdev[N_REGULATORS];
141};
142
143static int __read_reg(struct tps6524x *hw, int reg)
144{
145 int error = 0;
146 u16 cmd = CMD_READ(reg), in;
147 u8 status;
148 struct spi_message m;
149 struct spi_transfer t[3];
150
151 spi_message_init(&m);
152 memset(t, 0, sizeof(t));
153
154 t[0].tx_buf = &cmd;
155 t[0].len = 2;
156 t[0].bits_per_word = 12;
157 spi_message_add_tail(&t[0], &m);
158
159 t[1].rx_buf = ∈
160 t[1].len = 2;
161 t[1].bits_per_word = 16;
162 spi_message_add_tail(&t[1], &m);
163
164 t[2].rx_buf = &status;
165 t[2].len = 1;
166 t[2].bits_per_word = 4;
167 spi_message_add_tail(&t[2], &m);
168
169 error = spi_sync(hw->spi, &m);
170 if (error < 0)
171 return error;
172
173 dev_dbg(hw->dev, "read reg %d, data %x, status %x\n",
174 reg, in, status);
175
176 if (!(status & STAT_CLK) || (status & STAT_WRITE))
177 return -EIO;
178
179 if (status & STAT_INVALID)
180 return -EINVAL;
181
182 return in;
183}
184
185static int read_reg(struct tps6524x *hw, int reg)
186{
187 int ret;
188
189 mutex_lock(&hw->lock);
190 ret = __read_reg(hw, reg);
191 mutex_unlock(&hw->lock);
192
193 return ret;
194}
195
196static int __write_reg(struct tps6524x *hw, int reg, int val)
197{
198 int error = 0;
199 u16 cmd = CMD_WRITE(reg), out = val;
200 u8 status;
201 struct spi_message m;
202 struct spi_transfer t[3];
203
204 spi_message_init(&m);
205 memset(t, 0, sizeof(t));
206
207 t[0].tx_buf = &cmd;
208 t[0].len = 2;
209 t[0].bits_per_word = 12;
210 spi_message_add_tail(&t[0], &m);
211
212 t[1].tx_buf = &out;
213 t[1].len = 2;
214 t[1].bits_per_word = 16;
215 spi_message_add_tail(&t[1], &m);
216
217 t[2].rx_buf = &status;
218 t[2].len = 1;
219 t[2].bits_per_word = 4;
220 spi_message_add_tail(&t[2], &m);
221
222 error = spi_sync(hw->spi, &m);
223 if (error < 0)
224 return error;
225
226 dev_dbg(hw->dev, "wrote reg %d, data %x, status %x\n",
227 reg, out, status);
228
229 if (!(status & STAT_CLK) || !(status & STAT_WRITE))
230 return -EIO;
231
232 if (status & (STAT_INVALID | STAT_WP))
233 return -EINVAL;
234
235 return error;
236}
237
238static int __rmw_reg(struct tps6524x *hw, int reg, int mask, int val)
239{
240 int ret;
241
242 ret = __read_reg(hw, reg);
243 if (ret < 0)
244 return ret;
245
246 ret &= ~mask;
247 ret |= val;
248
249 ret = __write_reg(hw, reg, ret);
250
251 return (ret < 0) ? ret : 0;
252}
253
254static int rmw_protect(struct tps6524x *hw, int reg, int mask, int val)
255{
256 int ret;
257
258 mutex_lock(&hw->lock);
259
260 ret = __write_reg(hw, REG_WRITE_ENABLE, 1);
261 if (ret) {
262 dev_err(hw->dev, "failed to set write enable\n");
263 goto error;
264 }
265
266 ret = __rmw_reg(hw, reg, mask, val);
267 if (ret)
268 dev_err(hw->dev, "failed to rmw register %d\n", reg);
269
270 ret = __write_reg(hw, REG_WRITE_ENABLE, 0);
271 if (ret) {
272 dev_err(hw->dev, "failed to clear write enable\n");
273 goto error;
274 }
275
276error:
277 mutex_unlock(&hw->lock);
278
279 return ret;
280}
281
282static int read_field(struct tps6524x *hw, const struct field *field)
283{
284 int tmp;
285
286 tmp = read_reg(hw, field->reg);
287 if (tmp < 0)
288 return tmp;
289
290 return (tmp >> field->shift) & field->mask;
291}
292
293static int write_field(struct tps6524x *hw, const struct field *field,
294 int val)
295{
296 if (val & ~field->mask)
297 return -EOVERFLOW;
298
299 return rmw_protect(hw, field->reg,
300 field->mask << field->shift,
301 val << field->shift);
302}
303
304static const unsigned int dcdc1_voltages[] = {
305 800000, 825000, 850000, 875000,
306 900000, 925000, 950000, 975000,
307 1000000, 1025000, 1050000, 1075000,
308 1100000, 1125000, 1150000, 1175000,
309 1200000, 1225000, 1250000, 1275000,
310 1300000, 1325000, 1350000, 1375000,
311 1400000, 1425000, 1450000, 1475000,
312 1500000, 1525000, 1550000, 1575000,
313};
314
315static const unsigned int dcdc2_voltages[] = {
316 1400000, 1450000, 1500000, 1550000,
317 1600000, 1650000, 1700000, 1750000,
318 1800000, 1850000, 1900000, 1950000,
319 2000000, 2050000, 2100000, 2150000,
320 2200000, 2250000, 2300000, 2350000,
321 2400000, 2450000, 2500000, 2550000,
322 2600000, 2650000, 2700000, 2750000,
323 2800000, 2850000, 2900000, 2950000,
324};
325
326static const unsigned int dcdc3_voltages[] = {
327 2400000, 2450000, 2500000, 2550000, 2600000,
328 2650000, 2700000, 2750000, 2800000, 2850000,
329 2900000, 2950000, 3000000, 3050000, 3100000,
330 3150000, 3200000, 3250000, 3300000, 3350000,
331 3400000, 3450000, 3500000, 3550000, 3600000,
332};
333
334static const unsigned int ldo1_voltages[] = {
335 4300000, 4350000, 4400000, 4450000,
336 4500000, 4550000, 4600000, 4650000,
337 4700000, 4750000, 4800000, 4850000,
338 4900000, 4950000, 5000000, 5050000,
339};
340
341static const unsigned int ldo2_voltages[] = {
342 1100000, 1150000, 1200000, 1250000,
343 1300000, 1700000, 1750000, 1800000,
344 1850000, 1900000, 3150000, 3200000,
345 3250000, 3300000, 3350000, 3400000,
346};
347
348static const unsigned int fixed_5000000_voltage[] = {
349 5000000
350};
351
352static const unsigned int ldo_ilimsel[] = {
353 400000, 1500000
354};
355
356static const unsigned int usb_ilimsel[] = {
357 200000, 400000, 800000, 1000000
358};
359
360static const unsigned int fixed_2400000_ilimsel[] = {
361 2400000
362};
363
364static const unsigned int fixed_1200000_ilimsel[] = {
365 1200000
366};
367
368static const unsigned int fixed_400000_ilimsel[] = {
369 400000
370};
371
372#define __MK_FIELD(_reg, _mask, _shift) \
373 { .reg = (_reg), .mask = (_mask), .shift = (_shift), }
374
375static const struct supply_info supply_info[N_REGULATORS] = {
376 {
377 .name = "DCDC1",
378 .n_voltages = ARRAY_SIZE(dcdc1_voltages),
379 .voltages = dcdc1_voltages,
380 .n_ilimsels = ARRAY_SIZE(fixed_2400000_ilimsel),
381 .ilimsels = fixed_2400000_ilimsel,
382 .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
383 DCDCDCDC1_EN_SHIFT),
384 .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
385 DCDC_VDCDC1_SHIFT),
386 },
387 {
388 .name = "DCDC2",
389 .n_voltages = ARRAY_SIZE(dcdc2_voltages),
390 .voltages = dcdc2_voltages,
391 .n_ilimsels = ARRAY_SIZE(fixed_1200000_ilimsel),
392 .ilimsels = fixed_1200000_ilimsel,
393 .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
394 DCDCDCDC2_EN_SHIFT),
395 .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
396 DCDC_VDCDC2_SHIFT),
397 },
398 {
399 .name = "DCDC3",
400 .n_voltages = ARRAY_SIZE(dcdc3_voltages),
401 .voltages = dcdc3_voltages,
402 .n_ilimsels = ARRAY_SIZE(fixed_1200000_ilimsel),
403 .ilimsels = fixed_1200000_ilimsel,
404 .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
405 DCDCDCDC3_EN_SHIFT),
406 .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
407 DCDC_VDCDC3_SHIFT),
408 },
409 {
410 .name = "LDO1",
411 .n_voltages = ARRAY_SIZE(ldo1_voltages),
412 .voltages = ldo1_voltages,
413 .n_ilimsels = ARRAY_SIZE(ldo_ilimsel),
414 .ilimsels = ldo_ilimsel,
415 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
416 BLOCK_LDO1_SHIFT),
417 .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK,
418 LDO1_VSEL_SHIFT),
419 .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK,
420 LDO1_ILIM_SHIFT),
421 },
422 {
423 .name = "LDO2",
424 .n_voltages = ARRAY_SIZE(ldo2_voltages),
425 .voltages = ldo2_voltages,
426 .n_ilimsels = ARRAY_SIZE(ldo_ilimsel),
427 .ilimsels = ldo_ilimsel,
428 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
429 BLOCK_LDO2_SHIFT),
430 .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK,
431 LDO2_VSEL_SHIFT),
432 .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK,
433 LDO2_ILIM_SHIFT),
434 },
435 {
436 .name = "USB",
437 .n_voltages = ARRAY_SIZE(fixed_5000000_voltage),
438 .voltages = fixed_5000000_voltage,
439 .n_ilimsels = ARRAY_SIZE(usb_ilimsel),
440 .ilimsels = usb_ilimsel,
441 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
442 BLOCK_USB_SHIFT),
443 .ilimsel = __MK_FIELD(REG_USB, USB_ILIM_MASK,
444 USB_ILIM_SHIFT),
445 },
446 {
447 .name = "LCD",
448 .n_voltages = ARRAY_SIZE(fixed_5000000_voltage),
449 .voltages = fixed_5000000_voltage,
450 .n_ilimsels = ARRAY_SIZE(fixed_400000_ilimsel),
451 .ilimsels = fixed_400000_ilimsel,
452 .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
453 BLOCK_LCD_SHIFT),
454 },
455};
456
457static int set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
458{
459 const struct supply_info *info;
460 struct tps6524x *hw;
461
462 hw = rdev_get_drvdata(rdev);
463 info = &supply_info[rdev_get_id(rdev)];
464
465 if (rdev->desc->n_voltages == 1)
466 return -EINVAL;
467
468 return write_field(hw, &info->voltage, selector);
469}
470
471static int get_voltage_sel(struct regulator_dev *rdev)
472{
473 const struct supply_info *info;
474 struct tps6524x *hw;
475 int ret;
476
477 hw = rdev_get_drvdata(rdev);
478 info = &supply_info[rdev_get_id(rdev)];
479
480 if (rdev->desc->n_voltages == 1)
481 return 0;
482
483 ret = read_field(hw, &info->voltage);
484 if (ret < 0)
485 return ret;
486 if (WARN_ON(ret >= info->n_voltages))
487 return -EIO;
488
489 return ret;
490}
491
492static int set_current_limit(struct regulator_dev *rdev, int min_uA,
493 int max_uA)
494{
495 const struct supply_info *info;
496 struct tps6524x *hw;
497 int i;
498
499 hw = rdev_get_drvdata(rdev);
500 info = &supply_info[rdev_get_id(rdev)];
501
502 if (info->n_ilimsels == 1)
503 return -EINVAL;
504
505 for (i = info->n_ilimsels - 1; i >= 0; i--) {
506 if (min_uA <= info->ilimsels[i] &&
507 max_uA >= info->ilimsels[i])
508 return write_field(hw, &info->ilimsel, i);
509 }
510
511 return -EINVAL;
512}
513
514static int get_current_limit(struct regulator_dev *rdev)
515{
516 const struct supply_info *info;
517 struct tps6524x *hw;
518 int ret;
519
520 hw = rdev_get_drvdata(rdev);
521 info = &supply_info[rdev_get_id(rdev)];
522
523 if (info->n_ilimsels == 1)
524 return info->ilimsels[0];
525
526 ret = read_field(hw, &info->ilimsel);
527 if (ret < 0)
528 return ret;
529 if (WARN_ON(ret >= info->n_ilimsels))
530 return -EIO;
531
532 return info->ilimsels[ret];
533}
534
535static int enable_supply(struct regulator_dev *rdev)
536{
537 const struct supply_info *info;
538 struct tps6524x *hw;
539
540 hw = rdev_get_drvdata(rdev);
541 info = &supply_info[rdev_get_id(rdev)];
542
543 return write_field(hw, &info->enable, 1);
544}
545
546static int disable_supply(struct regulator_dev *rdev)
547{
548 const struct supply_info *info;
549 struct tps6524x *hw;
550
551 hw = rdev_get_drvdata(rdev);
552 info = &supply_info[rdev_get_id(rdev)];
553
554 return write_field(hw, &info->enable, 0);
555}
556
557static int is_supply_enabled(struct regulator_dev *rdev)
558{
559 const struct supply_info *info;
560 struct tps6524x *hw;
561
562 hw = rdev_get_drvdata(rdev);
563 info = &supply_info[rdev_get_id(rdev)];
564
565 return read_field(hw, &info->enable);
566}
567
568static struct regulator_ops regulator_ops = {
569 .is_enabled = is_supply_enabled,
570 .enable = enable_supply,
571 .disable = disable_supply,
572 .get_voltage_sel = get_voltage_sel,
573 .set_voltage_sel = set_voltage_sel,
574 .list_voltage = regulator_list_voltage_table,
575 .map_voltage = regulator_map_voltage_ascend,
576 .set_current_limit = set_current_limit,
577 .get_current_limit = get_current_limit,
578};
579
580static int pmic_probe(struct spi_device *spi)
581{
582 struct tps6524x *hw;
583 struct device *dev = &spi->dev;
584 const struct supply_info *info = supply_info;
585 struct regulator_init_data *init_data;
586 struct regulator_config config = { };
587 int i;
588
589 init_data = dev_get_platdata(dev);
590 if (!init_data) {
591 dev_err(dev, "could not find regulator platform data\n");
592 return -EINVAL;
593 }
594
595 hw = devm_kzalloc(&spi->dev, sizeof(struct tps6524x), GFP_KERNEL);
596 if (!hw)
597 return -ENOMEM;
598
599 spi_set_drvdata(spi, hw);
600
601 memset(hw, 0, sizeof(struct tps6524x));
602 hw->dev = dev;
603 hw->spi = spi_dev_get(spi);
604 mutex_init(&hw->lock);
605
606 for (i = 0; i < N_REGULATORS; i++, info++, init_data++) {
607 hw->desc[i].name = info->name;
608 hw->desc[i].id = i;
609 hw->desc[i].n_voltages = info->n_voltages;
610 hw->desc[i].volt_table = info->voltages;
611 hw->desc[i].ops = ®ulator_ops;
612 hw->desc[i].type = REGULATOR_VOLTAGE;
613 hw->desc[i].owner = THIS_MODULE;
614
615 config.dev = dev;
616 config.init_data = init_data;
617 config.driver_data = hw;
618
619 hw->rdev[i] = devm_regulator_register(dev, &hw->desc[i],
620 &config);
621 if (IS_ERR(hw->rdev[i]))
622 return PTR_ERR(hw->rdev[i]);
623 }
624
625 return 0;
626}
627
628static struct spi_driver pmic_driver = {
629 .probe = pmic_probe,
630 .driver = {
631 .name = "tps6524x",
632 .owner = THIS_MODULE,
633 },
634};
635
636module_spi_driver(pmic_driver);
637
638MODULE_DESCRIPTION("TPS6524X PMIC Driver");
639MODULE_AUTHOR("Cyril Chemparathy");
640MODULE_LICENSE("GPL");
641MODULE_ALIAS("spi:tps6524x");