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1394fd28 CC |
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 (3 /* DCDC */ + \ | |
112 | 2 /* LDO */ + \ | |
113 | 2 /* switch */) | |
114 | ||
115 | #define FIXED_ILIMSEL BIT(0) | |
116 | #define FIXED_VOLTAGE BIT(1) | |
117 | ||
118 | #define CMD_READ(reg) ((reg) << 6) | |
119 | #define CMD_WRITE(reg) (BIT(5) | (reg) << 6) | |
120 | #define STAT_CLK BIT(3) | |
121 | #define STAT_WRITE BIT(2) | |
122 | #define STAT_INVALID BIT(1) | |
123 | #define STAT_WP BIT(0) | |
124 | ||
125 | struct field { | |
126 | int reg; | |
127 | int shift; | |
128 | int mask; | |
129 | }; | |
130 | ||
131 | struct supply_info { | |
132 | const char *name; | |
133 | int n_voltages; | |
134 | const int *voltages; | |
135 | int fixed_voltage; | |
136 | int n_ilimsels; | |
137 | const int *ilimsels; | |
138 | int fixed_ilimsel; | |
139 | int flags; | |
140 | struct field enable, voltage, ilimsel; | |
141 | }; | |
142 | ||
143 | struct tps6524x { | |
144 | struct device *dev; | |
145 | struct spi_device *spi; | |
146 | struct mutex lock; | |
147 | struct regulator_desc desc[N_REGULATORS]; | |
148 | struct regulator_dev *rdev[N_REGULATORS]; | |
149 | }; | |
150 | ||
151 | static int __read_reg(struct tps6524x *hw, int reg) | |
152 | { | |
153 | int error = 0; | |
154 | u16 cmd = CMD_READ(reg), in; | |
155 | u8 status; | |
156 | struct spi_message m; | |
157 | struct spi_transfer t[3]; | |
158 | ||
159 | spi_message_init(&m); | |
160 | memset(t, 0, sizeof(t)); | |
161 | ||
162 | t[0].tx_buf = &cmd; | |
163 | t[0].len = 2; | |
164 | t[0].bits_per_word = 12; | |
165 | spi_message_add_tail(&t[0], &m); | |
166 | ||
167 | t[1].rx_buf = ∈ | |
168 | t[1].len = 2; | |
169 | t[1].bits_per_word = 16; | |
170 | spi_message_add_tail(&t[1], &m); | |
171 | ||
172 | t[2].rx_buf = &status; | |
173 | t[2].len = 1; | |
174 | t[2].bits_per_word = 4; | |
175 | spi_message_add_tail(&t[2], &m); | |
176 | ||
177 | error = spi_sync(hw->spi, &m); | |
178 | if (error < 0) | |
179 | return error; | |
180 | ||
181 | dev_dbg(hw->dev, "read reg %d, data %x, status %x\n", | |
182 | reg, in, status); | |
183 | ||
184 | if (!(status & STAT_CLK) || (status & STAT_WRITE)) | |
185 | return -EIO; | |
186 | ||
187 | if (status & STAT_INVALID) | |
188 | return -EINVAL; | |
189 | ||
190 | return in; | |
191 | } | |
192 | ||
193 | static int read_reg(struct tps6524x *hw, int reg) | |
194 | { | |
195 | int ret; | |
196 | ||
197 | mutex_lock(&hw->lock); | |
198 | ret = __read_reg(hw, reg); | |
199 | mutex_unlock(&hw->lock); | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
204 | static int __write_reg(struct tps6524x *hw, int reg, int val) | |
205 | { | |
206 | int error = 0; | |
207 | u16 cmd = CMD_WRITE(reg), out = val; | |
208 | u8 status; | |
209 | struct spi_message m; | |
210 | struct spi_transfer t[3]; | |
211 | ||
212 | spi_message_init(&m); | |
213 | memset(t, 0, sizeof(t)); | |
214 | ||
215 | t[0].tx_buf = &cmd; | |
216 | t[0].len = 2; | |
217 | t[0].bits_per_word = 12; | |
218 | spi_message_add_tail(&t[0], &m); | |
219 | ||
220 | t[1].tx_buf = &out; | |
221 | t[1].len = 2; | |
222 | t[1].bits_per_word = 16; | |
223 | spi_message_add_tail(&t[1], &m); | |
224 | ||
225 | t[2].rx_buf = &status; | |
226 | t[2].len = 1; | |
227 | t[2].bits_per_word = 4; | |
228 | spi_message_add_tail(&t[2], &m); | |
229 | ||
230 | error = spi_sync(hw->spi, &m); | |
231 | if (error < 0) | |
232 | return error; | |
233 | ||
234 | dev_dbg(hw->dev, "wrote reg %d, data %x, status %x\n", | |
235 | reg, out, status); | |
236 | ||
237 | if (!(status & STAT_CLK) || !(status & STAT_WRITE)) | |
238 | return -EIO; | |
239 | ||
240 | if (status & (STAT_INVALID | STAT_WP)) | |
241 | return -EINVAL; | |
242 | ||
243 | return error; | |
244 | } | |
245 | ||
246 | static int __rmw_reg(struct tps6524x *hw, int reg, int mask, int val) | |
247 | { | |
248 | int ret; | |
249 | ||
250 | ret = __read_reg(hw, reg); | |
251 | if (ret < 0) | |
252 | return ret; | |
253 | ||
254 | ret &= ~mask; | |
255 | ret |= val; | |
256 | ||
257 | ret = __write_reg(hw, reg, ret); | |
258 | ||
259 | return (ret < 0) ? ret : 0; | |
260 | } | |
261 | ||
262 | static int rmw_protect(struct tps6524x *hw, int reg, int mask, int val) | |
263 | { | |
264 | int ret; | |
265 | ||
266 | mutex_lock(&hw->lock); | |
267 | ||
268 | ret = __write_reg(hw, REG_WRITE_ENABLE, 1); | |
269 | if (ret) { | |
270 | dev_err(hw->dev, "failed to set write enable\n"); | |
271 | goto error; | |
272 | } | |
273 | ||
274 | ret = __rmw_reg(hw, reg, mask, val); | |
275 | if (ret) | |
276 | dev_err(hw->dev, "failed to rmw register %d\n", reg); | |
277 | ||
278 | ret = __write_reg(hw, REG_WRITE_ENABLE, 0); | |
279 | if (ret) { | |
280 | dev_err(hw->dev, "failed to clear write enable\n"); | |
281 | goto error; | |
282 | } | |
283 | ||
284 | error: | |
285 | mutex_unlock(&hw->lock); | |
286 | ||
287 | return ret; | |
288 | } | |
289 | ||
290 | static int read_field(struct tps6524x *hw, const struct field *field) | |
291 | { | |
292 | int tmp; | |
293 | ||
294 | tmp = read_reg(hw, field->reg); | |
295 | if (tmp < 0) | |
296 | return tmp; | |
297 | ||
298 | return (tmp >> field->shift) & field->mask; | |
299 | } | |
300 | ||
301 | static int write_field(struct tps6524x *hw, const struct field *field, | |
302 | int val) | |
303 | { | |
304 | if (val & ~field->mask) | |
305 | return -EOVERFLOW; | |
306 | ||
307 | return rmw_protect(hw, field->reg, | |
308 | field->mask << field->shift, | |
309 | val << field->shift); | |
310 | } | |
311 | ||
312 | static const int dcdc1_voltages[] = { | |
313 | 800000, 825000, 850000, 875000, | |
314 | 900000, 925000, 950000, 975000, | |
315 | 1000000, 1025000, 1050000, 1075000, | |
316 | 1100000, 1125000, 1150000, 1175000, | |
317 | 1200000, 1225000, 1250000, 1275000, | |
318 | 1300000, 1325000, 1350000, 1375000, | |
319 | 1400000, 1425000, 1450000, 1475000, | |
320 | 1500000, 1525000, 1550000, 1575000, | |
321 | }; | |
322 | ||
323 | static const int dcdc2_voltages[] = { | |
324 | 1400000, 1450000, 1500000, 1550000, | |
325 | 1600000, 1650000, 1700000, 1750000, | |
326 | 1800000, 1850000, 1900000, 1950000, | |
327 | 2000000, 2050000, 2100000, 2150000, | |
328 | 2200000, 2250000, 2300000, 2350000, | |
329 | 2400000, 2450000, 2500000, 2550000, | |
330 | 2600000, 2650000, 2700000, 2750000, | |
331 | 2800000, 2850000, 2900000, 2950000, | |
332 | }; | |
333 | ||
334 | static const int dcdc3_voltages[] = { | |
335 | 2400000, 2450000, 2500000, 2550000, 2600000, | |
336 | 2650000, 2700000, 2750000, 2800000, 2850000, | |
337 | 2900000, 2950000, 3000000, 3050000, 3100000, | |
338 | 3150000, 3200000, 3250000, 3300000, 3350000, | |
339 | 3400000, 3450000, 3500000, 3550000, 3600000, | |
340 | }; | |
341 | ||
342 | static const int ldo1_voltages[] = { | |
343 | 4300000, 4350000, 4400000, 4450000, | |
344 | 4500000, 4550000, 4600000, 4650000, | |
345 | 4700000, 4750000, 4800000, 4850000, | |
346 | 4900000, 4950000, 5000000, 5050000, | |
347 | }; | |
348 | ||
349 | static const int ldo2_voltages[] = { | |
350 | 1100000, 1150000, 1200000, 1250000, | |
351 | 1300000, 1700000, 1750000, 1800000, | |
352 | 1850000, 1900000, 3150000, 3200000, | |
353 | 3250000, 3300000, 3350000, 3400000, | |
354 | }; | |
355 | ||
356 | static const int ldo_ilimsel[] = { | |
357 | 400000, 1500000 | |
358 | }; | |
359 | ||
360 | static const int usb_ilimsel[] = { | |
361 | 200000, 400000, 800000, 1000000 | |
362 | }; | |
363 | ||
364 | #define __MK_FIELD(_reg, _mask, _shift) \ | |
365 | { .reg = (_reg), .mask = (_mask), .shift = (_shift), } | |
366 | ||
367 | static const struct supply_info supply_info[N_REGULATORS] = { | |
368 | { | |
369 | .name = "DCDC1", | |
370 | .flags = FIXED_ILIMSEL, | |
371 | .n_voltages = ARRAY_SIZE(dcdc1_voltages), | |
372 | .voltages = dcdc1_voltages, | |
373 | .fixed_ilimsel = 2400000, | |
374 | .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK, | |
375 | DCDCDCDC1_EN_SHIFT), | |
376 | .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK, | |
377 | DCDC_VDCDC1_SHIFT), | |
378 | }, | |
379 | { | |
380 | .name = "DCDC2", | |
381 | .flags = FIXED_ILIMSEL, | |
382 | .n_voltages = ARRAY_SIZE(dcdc2_voltages), | |
383 | .voltages = dcdc2_voltages, | |
384 | .fixed_ilimsel = 1200000, | |
385 | .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK, | |
386 | DCDCDCDC2_EN_SHIFT), | |
387 | .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK, | |
388 | DCDC_VDCDC2_SHIFT), | |
389 | }, | |
390 | { | |
391 | .name = "DCDC3", | |
392 | .flags = FIXED_ILIMSEL, | |
393 | .n_voltages = ARRAY_SIZE(dcdc3_voltages), | |
394 | .voltages = dcdc3_voltages, | |
395 | .fixed_ilimsel = 1200000, | |
396 | .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK, | |
397 | DCDCDCDC3_EN_SHIFT), | |
398 | .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK, | |
399 | DCDC_VDCDC3_SHIFT), | |
400 | }, | |
401 | { | |
402 | .name = "LDO1", | |
403 | .n_voltages = ARRAY_SIZE(ldo1_voltages), | |
404 | .voltages = ldo1_voltages, | |
405 | .n_ilimsels = ARRAY_SIZE(ldo_ilimsel), | |
406 | .ilimsels = ldo_ilimsel, | |
407 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
408 | BLOCK_LDO1_SHIFT), | |
409 | .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK, | |
410 | LDO1_VSEL_SHIFT), | |
411 | .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK, | |
412 | LDO1_ILIM_SHIFT), | |
413 | }, | |
414 | { | |
415 | .name = "LDO2", | |
416 | .n_voltages = ARRAY_SIZE(ldo2_voltages), | |
417 | .voltages = ldo2_voltages, | |
418 | .n_ilimsels = ARRAY_SIZE(ldo_ilimsel), | |
419 | .ilimsels = ldo_ilimsel, | |
420 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
421 | BLOCK_LDO2_SHIFT), | |
422 | .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK, | |
423 | LDO2_VSEL_SHIFT), | |
424 | .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK, | |
425 | LDO2_ILIM_SHIFT), | |
426 | }, | |
427 | { | |
428 | .name = "USB", | |
429 | .flags = FIXED_VOLTAGE, | |
430 | .fixed_voltage = 5000000, | |
431 | .n_ilimsels = ARRAY_SIZE(usb_ilimsel), | |
432 | .ilimsels = usb_ilimsel, | |
433 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
434 | BLOCK_USB_SHIFT), | |
435 | .ilimsel = __MK_FIELD(REG_USB, USB_ILIM_MASK, | |
436 | USB_ILIM_SHIFT), | |
437 | }, | |
438 | { | |
439 | .name = "LCD", | |
440 | .flags = FIXED_VOLTAGE | FIXED_ILIMSEL, | |
441 | .fixed_voltage = 5000000, | |
442 | .fixed_ilimsel = 400000, | |
443 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
444 | BLOCK_LCD_SHIFT), | |
445 | }, | |
446 | }; | |
447 | ||
448 | static int list_voltage(struct regulator_dev *rdev, unsigned selector) | |
449 | { | |
450 | const struct supply_info *info; | |
451 | struct tps6524x *hw; | |
452 | ||
453 | hw = rdev_get_drvdata(rdev); | |
454 | info = &supply_info[rdev_get_id(rdev)]; | |
455 | ||
456 | if (info->flags & FIXED_VOLTAGE) | |
457 | return selector ? -EINVAL : info->fixed_voltage; | |
458 | ||
459 | return ((selector < info->n_voltages) ? | |
460 | info->voltages[selector] : -EINVAL); | |
461 | } | |
462 | ||
463 | static int set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, | |
464 | unsigned *selector) | |
465 | { | |
466 | const struct supply_info *info; | |
467 | struct tps6524x *hw; | |
468 | unsigned i; | |
469 | ||
470 | hw = rdev_get_drvdata(rdev); | |
471 | info = &supply_info[rdev_get_id(rdev)]; | |
472 | ||
473 | if (info->flags & FIXED_VOLTAGE) | |
474 | return -EINVAL; | |
475 | ||
476 | for (i = 0; i < info->n_voltages; i++) | |
477 | if (min_uV <= info->voltages[i] && | |
478 | max_uV >= info->voltages[i]) | |
479 | break; | |
480 | ||
481 | if (i >= info->n_voltages) | |
482 | i = info->n_voltages - 1; | |
483 | ||
484 | *selector = info->voltages[i]; | |
485 | ||
486 | return write_field(hw, &info->voltage, i); | |
487 | } | |
488 | ||
489 | static int get_voltage(struct regulator_dev *rdev) | |
490 | { | |
491 | const struct supply_info *info; | |
492 | struct tps6524x *hw; | |
493 | int ret; | |
494 | ||
495 | hw = rdev_get_drvdata(rdev); | |
496 | info = &supply_info[rdev_get_id(rdev)]; | |
497 | ||
498 | if (info->flags & FIXED_VOLTAGE) | |
499 | return info->fixed_voltage; | |
500 | ||
501 | ret = read_field(hw, &info->voltage); | |
502 | if (ret < 0) | |
503 | return ret; | |
504 | if (WARN_ON(ret >= info->n_voltages)) | |
505 | return -EIO; | |
506 | ||
507 | return info->voltages[ret]; | |
508 | } | |
509 | ||
510 | static int set_current_limit(struct regulator_dev *rdev, int min_uA, | |
511 | int max_uA) | |
512 | { | |
513 | const struct supply_info *info; | |
514 | struct tps6524x *hw; | |
515 | int i; | |
516 | ||
517 | hw = rdev_get_drvdata(rdev); | |
518 | info = &supply_info[rdev_get_id(rdev)]; | |
519 | ||
520 | if (info->flags & FIXED_ILIMSEL) | |
521 | return -EINVAL; | |
522 | ||
523 | for (i = 0; i < info->n_ilimsels; i++) | |
524 | if (min_uA <= info->ilimsels[i] && | |
525 | max_uA >= info->ilimsels[i]) | |
526 | break; | |
527 | ||
528 | if (i >= info->n_ilimsels) | |
529 | return -EINVAL; | |
530 | ||
531 | return write_field(hw, &info->ilimsel, i); | |
532 | } | |
533 | ||
534 | static int get_current_limit(struct regulator_dev *rdev) | |
535 | { | |
536 | const struct supply_info *info; | |
537 | struct tps6524x *hw; | |
538 | int ret; | |
539 | ||
540 | hw = rdev_get_drvdata(rdev); | |
541 | info = &supply_info[rdev_get_id(rdev)]; | |
542 | ||
543 | if (info->flags & FIXED_ILIMSEL) | |
544 | return info->fixed_ilimsel; | |
545 | ||
546 | ret = read_field(hw, &info->ilimsel); | |
547 | if (ret < 0) | |
548 | return ret; | |
549 | if (WARN_ON(ret >= info->n_ilimsels)) | |
550 | return -EIO; | |
551 | ||
552 | return info->ilimsels[ret]; | |
553 | } | |
554 | ||
555 | static int enable_supply(struct regulator_dev *rdev) | |
556 | { | |
557 | const struct supply_info *info; | |
558 | struct tps6524x *hw; | |
559 | ||
560 | hw = rdev_get_drvdata(rdev); | |
561 | info = &supply_info[rdev_get_id(rdev)]; | |
562 | ||
563 | return write_field(hw, &info->enable, 1); | |
564 | } | |
565 | ||
566 | static int disable_supply(struct regulator_dev *rdev) | |
567 | { | |
568 | const struct supply_info *info; | |
569 | struct tps6524x *hw; | |
570 | ||
571 | hw = rdev_get_drvdata(rdev); | |
572 | info = &supply_info[rdev_get_id(rdev)]; | |
573 | ||
574 | return write_field(hw, &info->enable, 0); | |
575 | } | |
576 | ||
577 | static int is_supply_enabled(struct regulator_dev *rdev) | |
578 | { | |
579 | const struct supply_info *info; | |
580 | struct tps6524x *hw; | |
581 | ||
582 | hw = rdev_get_drvdata(rdev); | |
583 | info = &supply_info[rdev_get_id(rdev)]; | |
584 | ||
585 | return read_field(hw, &info->enable); | |
586 | } | |
587 | ||
588 | static struct regulator_ops regulator_ops = { | |
589 | .is_enabled = is_supply_enabled, | |
590 | .enable = enable_supply, | |
591 | .disable = disable_supply, | |
592 | .get_voltage = get_voltage, | |
593 | .set_voltage = set_voltage, | |
594 | .list_voltage = list_voltage, | |
595 | .set_current_limit = set_current_limit, | |
596 | .get_current_limit = get_current_limit, | |
597 | }; | |
598 | ||
5362b098 | 599 | static int pmic_remove(struct spi_device *spi) |
1394fd28 CC |
600 | { |
601 | struct tps6524x *hw = spi_get_drvdata(spi); | |
602 | int i; | |
603 | ||
604 | if (!hw) | |
605 | return 0; | |
606 | for (i = 0; i < N_REGULATORS; i++) { | |
607 | if (hw->rdev[i]) | |
608 | regulator_unregister(hw->rdev[i]); | |
609 | hw->rdev[i] = NULL; | |
610 | } | |
611 | spi_set_drvdata(spi, NULL); | |
612 | kfree(hw); | |
613 | return 0; | |
614 | } | |
615 | ||
616 | static int __devinit pmic_probe(struct spi_device *spi) | |
617 | { | |
618 | struct tps6524x *hw; | |
619 | struct device *dev = &spi->dev; | |
620 | const struct supply_info *info = supply_info; | |
621 | struct regulator_init_data *init_data; | |
622 | int ret = 0, i; | |
623 | ||
624 | init_data = dev->platform_data; | |
625 | if (!init_data) { | |
626 | dev_err(dev, "could not find regulator platform data\n"); | |
627 | return -EINVAL; | |
628 | } | |
629 | ||
630 | hw = kzalloc(sizeof(struct tps6524x), GFP_KERNEL); | |
631 | if (!hw) { | |
632 | dev_err(dev, "cannot allocate regulator private data\n"); | |
633 | return -ENOMEM; | |
634 | } | |
635 | spi_set_drvdata(spi, hw); | |
636 | ||
637 | memset(hw, 0, sizeof(struct tps6524x)); | |
638 | hw->dev = dev; | |
639 | hw->spi = spi_dev_get(spi); | |
640 | mutex_init(&hw->lock); | |
641 | ||
642 | for (i = 0; i < N_REGULATORS; i++, info++, init_data++) { | |
643 | hw->desc[i].name = info->name; | |
644 | hw->desc[i].id = i; | |
645 | hw->desc[i].n_voltages = info->n_voltages; | |
646 | hw->desc[i].ops = ®ulator_ops; | |
647 | hw->desc[i].type = REGULATOR_VOLTAGE; | |
648 | hw->desc[i].owner = THIS_MODULE; | |
649 | ||
650 | if (info->flags & FIXED_VOLTAGE) | |
651 | hw->desc[i].n_voltages = 1; | |
652 | ||
653 | hw->rdev[i] = regulator_register(&hw->desc[i], dev, | |
654 | init_data, hw); | |
655 | if (IS_ERR(hw->rdev[i])) { | |
656 | ret = PTR_ERR(hw->rdev[i]); | |
657 | hw->rdev[i] = NULL; | |
658 | goto fail; | |
659 | } | |
660 | } | |
661 | ||
662 | return 0; | |
663 | ||
664 | fail: | |
665 | pmic_remove(spi); | |
666 | return ret; | |
667 | } | |
668 | ||
669 | static struct spi_driver pmic_driver = { | |
670 | .probe = pmic_probe, | |
671 | .remove = __devexit_p(pmic_remove), | |
672 | .driver = { | |
673 | .name = "tps6524x", | |
674 | .owner = THIS_MODULE, | |
675 | }, | |
676 | }; | |
677 | ||
678 | static int __init pmic_driver_init(void) | |
679 | { | |
680 | return spi_register_driver(&pmic_driver); | |
681 | } | |
682 | module_init(pmic_driver_init); | |
683 | ||
684 | static void __exit pmic_driver_exit(void) | |
685 | { | |
686 | spi_unregister_driver(&pmic_driver); | |
687 | } | |
688 | module_exit(pmic_driver_exit); | |
689 | ||
690 | MODULE_DESCRIPTION("TPS6524X PMIC Driver"); | |
691 | MODULE_AUTHOR("Cyril Chemparathy"); | |
692 | MODULE_LICENSE("GPL"); | |
693 | MODULE_ALIAS("spi:tps6524x"); |