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 | |
120 | struct field { |
121 | int reg; |
122 | int shift; |
123 | int mask; |
124 | }; |
125 | |
126 | struct 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 | |
135 | struct tps6524x { |
136 | struct device *dev; |
137 | struct spi_device *spi; |
138 | struct mutex lock; |
139 | struct regulator_desc desc[N_REGULATORS]; |
140 | }; |
141 | |
142 | static 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: &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: &t[0], m: &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: &t[1], m: &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: &t[2], m: &m); |
167 | |
168 | error = spi_sync(spi: hw->spi, message: &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 | |
184 | static 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(lock: &hw->lock); |
191 | |
192 | return ret; |
193 | } |
194 | |
195 | static 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: &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: &t[0], m: &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: &t[1], m: &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: &t[2], m: &m); |
220 | |
221 | error = spi_sync(spi: hw->spi, message: &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 | |
237 | static 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, val: ret); |
249 | |
250 | return (ret < 0) ? ret : 0; |
251 | } |
252 | |
253 | static 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, val: 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, val: 0); |
270 | if (ret) { |
271 | dev_err(hw->dev, "failed to clear write enable\n" ); |
272 | goto error; |
273 | } |
274 | |
275 | error: |
276 | mutex_unlock(lock: &hw->lock); |
277 | |
278 | return ret; |
279 | } |
280 | |
281 | static int read_field(struct tps6524x *hw, const struct field *field) |
282 | { |
283 | int tmp; |
284 | |
285 | tmp = read_reg(hw, reg: field->reg); |
286 | if (tmp < 0) |
287 | return tmp; |
288 | |
289 | return (tmp >> field->shift) & field->mask; |
290 | } |
291 | |
292 | static 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, reg: field->reg, |
299 | mask: field->mask << field->shift, |
300 | val: val << field->shift); |
301 | } |
302 | |
303 | static 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 | |
314 | static 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 | |
325 | static 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 | |
333 | static 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 | |
340 | static 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 | |
347 | static const unsigned int fixed_5000000_voltage[] = { |
348 | 5000000 |
349 | }; |
350 | |
351 | static const unsigned int ldo_ilimsel[] = { |
352 | 400000, 1500000 |
353 | }; |
354 | |
355 | static const unsigned int usb_ilimsel[] = { |
356 | 200000, 400000, 800000, 1000000 |
357 | }; |
358 | |
359 | static const unsigned int fixed_2400000_ilimsel[] = { |
360 | 2400000 |
361 | }; |
362 | |
363 | static const unsigned int fixed_1200000_ilimsel[] = { |
364 | 1200000 |
365 | }; |
366 | |
367 | static 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 | |
374 | static 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 | |
456 | static 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, field: &info->voltage, val: selector); |
468 | } |
469 | |
470 | static 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, field: &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 | |
491 | static 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, field: &info->ilimsel, val: i); |
508 | } |
509 | |
510 | return -EINVAL; |
511 | } |
512 | |
513 | static 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, field: &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 | |
534 | static 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, field: &info->enable, val: 1); |
543 | } |
544 | |
545 | static 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, field: &info->enable, val: 0); |
554 | } |
555 | |
556 | static 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, field: &info->enable); |
565 | } |
566 | |
567 | static 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 | |
579 | static 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(dev: &spi->dev, size: sizeof(struct tps6524x), GFP_KERNEL); |
596 | if (!hw) |
597 | return -ENOMEM; |
598 | |
599 | spi_set_drvdata(spi, data: 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, regulator_desc: &hw->desc[i], config: &config); |
620 | if (IS_ERR(ptr: rdev)) |
621 | return PTR_ERR(ptr: rdev); |
622 | } |
623 | |
624 | return 0; |
625 | } |
626 | |
627 | static struct spi_driver pmic_driver = { |
628 | .probe = pmic_probe, |
629 | .driver = { |
630 | .name = "tps6524x" , |
631 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
632 | }, |
633 | }; |
634 | |
635 | module_spi_driver(pmic_driver); |
636 | |
637 | MODULE_DESCRIPTION("TPS6524X PMIC Driver" ); |
638 | MODULE_AUTHOR("Cyril Chemparathy" ); |
639 | MODULE_LICENSE("GPL" ); |
640 | MODULE_ALIAS("spi:tps6524x" ); |
641 | |