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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 | |
4d984d1c | 111 | #define N_REGULATORS (N_DCDC + N_LDO + N_SWITCH) |
1394fd28 CC |
112 | |
113 | #define FIXED_ILIMSEL BIT(0) | |
114 | #define FIXED_VOLTAGE BIT(1) | |
115 | ||
116 | #define CMD_READ(reg) ((reg) << 6) | |
117 | #define CMD_WRITE(reg) (BIT(5) | (reg) << 6) | |
118 | #define STAT_CLK BIT(3) | |
119 | #define STAT_WRITE BIT(2) | |
120 | #define STAT_INVALID BIT(1) | |
121 | #define STAT_WP BIT(0) | |
122 | ||
123 | struct field { | |
124 | int reg; | |
125 | int shift; | |
126 | int mask; | |
127 | }; | |
128 | ||
129 | struct supply_info { | |
130 | const char *name; | |
131 | int n_voltages; | |
132 | const int *voltages; | |
133 | int fixed_voltage; | |
134 | int n_ilimsels; | |
135 | const int *ilimsels; | |
136 | int fixed_ilimsel; | |
137 | int flags; | |
138 | struct field enable, voltage, ilimsel; | |
139 | }; | |
140 | ||
141 | struct tps6524x { | |
142 | struct device *dev; | |
143 | struct spi_device *spi; | |
144 | struct mutex lock; | |
145 | struct regulator_desc desc[N_REGULATORS]; | |
146 | struct regulator_dev *rdev[N_REGULATORS]; | |
147 | }; | |
148 | ||
149 | static int __read_reg(struct tps6524x *hw, int reg) | |
150 | { | |
151 | int error = 0; | |
152 | u16 cmd = CMD_READ(reg), in; | |
153 | u8 status; | |
154 | struct spi_message m; | |
155 | struct spi_transfer t[3]; | |
156 | ||
157 | spi_message_init(&m); | |
158 | memset(t, 0, sizeof(t)); | |
159 | ||
160 | t[0].tx_buf = &cmd; | |
161 | t[0].len = 2; | |
162 | t[0].bits_per_word = 12; | |
163 | spi_message_add_tail(&t[0], &m); | |
164 | ||
165 | t[1].rx_buf = ∈ | |
166 | t[1].len = 2; | |
167 | t[1].bits_per_word = 16; | |
168 | spi_message_add_tail(&t[1], &m); | |
169 | ||
170 | t[2].rx_buf = &status; | |
171 | t[2].len = 1; | |
172 | t[2].bits_per_word = 4; | |
173 | spi_message_add_tail(&t[2], &m); | |
174 | ||
175 | error = spi_sync(hw->spi, &m); | |
176 | if (error < 0) | |
177 | return error; | |
178 | ||
179 | dev_dbg(hw->dev, "read reg %d, data %x, status %x\n", | |
180 | reg, in, status); | |
181 | ||
182 | if (!(status & STAT_CLK) || (status & STAT_WRITE)) | |
183 | return -EIO; | |
184 | ||
185 | if (status & STAT_INVALID) | |
186 | return -EINVAL; | |
187 | ||
188 | return in; | |
189 | } | |
190 | ||
191 | static int read_reg(struct tps6524x *hw, int reg) | |
192 | { | |
193 | int ret; | |
194 | ||
195 | mutex_lock(&hw->lock); | |
196 | ret = __read_reg(hw, reg); | |
197 | mutex_unlock(&hw->lock); | |
198 | ||
199 | return ret; | |
200 | } | |
201 | ||
202 | static int __write_reg(struct tps6524x *hw, int reg, int val) | |
203 | { | |
204 | int error = 0; | |
205 | u16 cmd = CMD_WRITE(reg), out = val; | |
206 | u8 status; | |
207 | struct spi_message m; | |
208 | struct spi_transfer t[3]; | |
209 | ||
210 | spi_message_init(&m); | |
211 | memset(t, 0, sizeof(t)); | |
212 | ||
213 | t[0].tx_buf = &cmd; | |
214 | t[0].len = 2; | |
215 | t[0].bits_per_word = 12; | |
216 | spi_message_add_tail(&t[0], &m); | |
217 | ||
218 | t[1].tx_buf = &out; | |
219 | t[1].len = 2; | |
220 | t[1].bits_per_word = 16; | |
221 | spi_message_add_tail(&t[1], &m); | |
222 | ||
223 | t[2].rx_buf = &status; | |
224 | t[2].len = 1; | |
225 | t[2].bits_per_word = 4; | |
226 | spi_message_add_tail(&t[2], &m); | |
227 | ||
228 | error = spi_sync(hw->spi, &m); | |
229 | if (error < 0) | |
230 | return error; | |
231 | ||
232 | dev_dbg(hw->dev, "wrote reg %d, data %x, status %x\n", | |
233 | reg, out, status); | |
234 | ||
235 | if (!(status & STAT_CLK) || !(status & STAT_WRITE)) | |
236 | return -EIO; | |
237 | ||
238 | if (status & (STAT_INVALID | STAT_WP)) | |
239 | return -EINVAL; | |
240 | ||
241 | return error; | |
242 | } | |
243 | ||
244 | static int __rmw_reg(struct tps6524x *hw, int reg, int mask, int val) | |
245 | { | |
246 | int ret; | |
247 | ||
248 | ret = __read_reg(hw, reg); | |
249 | if (ret < 0) | |
250 | return ret; | |
251 | ||
252 | ret &= ~mask; | |
253 | ret |= val; | |
254 | ||
255 | ret = __write_reg(hw, reg, ret); | |
256 | ||
257 | return (ret < 0) ? ret : 0; | |
258 | } | |
259 | ||
260 | static int rmw_protect(struct tps6524x *hw, int reg, int mask, int val) | |
261 | { | |
262 | int ret; | |
263 | ||
264 | mutex_lock(&hw->lock); | |
265 | ||
266 | ret = __write_reg(hw, REG_WRITE_ENABLE, 1); | |
267 | if (ret) { | |
268 | dev_err(hw->dev, "failed to set write enable\n"); | |
269 | goto error; | |
270 | } | |
271 | ||
272 | ret = __rmw_reg(hw, reg, mask, val); | |
273 | if (ret) | |
274 | dev_err(hw->dev, "failed to rmw register %d\n", reg); | |
275 | ||
276 | ret = __write_reg(hw, REG_WRITE_ENABLE, 0); | |
277 | if (ret) { | |
278 | dev_err(hw->dev, "failed to clear write enable\n"); | |
279 | goto error; | |
280 | } | |
281 | ||
282 | error: | |
283 | mutex_unlock(&hw->lock); | |
284 | ||
285 | return ret; | |
286 | } | |
287 | ||
288 | static int read_field(struct tps6524x *hw, const struct field *field) | |
289 | { | |
290 | int tmp; | |
291 | ||
292 | tmp = read_reg(hw, field->reg); | |
293 | if (tmp < 0) | |
294 | return tmp; | |
295 | ||
296 | return (tmp >> field->shift) & field->mask; | |
297 | } | |
298 | ||
299 | static int write_field(struct tps6524x *hw, const struct field *field, | |
300 | int val) | |
301 | { | |
302 | if (val & ~field->mask) | |
303 | return -EOVERFLOW; | |
304 | ||
305 | return rmw_protect(hw, field->reg, | |
306 | field->mask << field->shift, | |
307 | val << field->shift); | |
308 | } | |
309 | ||
310 | static const int dcdc1_voltages[] = { | |
311 | 800000, 825000, 850000, 875000, | |
312 | 900000, 925000, 950000, 975000, | |
313 | 1000000, 1025000, 1050000, 1075000, | |
314 | 1100000, 1125000, 1150000, 1175000, | |
315 | 1200000, 1225000, 1250000, 1275000, | |
316 | 1300000, 1325000, 1350000, 1375000, | |
317 | 1400000, 1425000, 1450000, 1475000, | |
318 | 1500000, 1525000, 1550000, 1575000, | |
319 | }; | |
320 | ||
321 | static const int dcdc2_voltages[] = { | |
322 | 1400000, 1450000, 1500000, 1550000, | |
323 | 1600000, 1650000, 1700000, 1750000, | |
324 | 1800000, 1850000, 1900000, 1950000, | |
325 | 2000000, 2050000, 2100000, 2150000, | |
326 | 2200000, 2250000, 2300000, 2350000, | |
327 | 2400000, 2450000, 2500000, 2550000, | |
328 | 2600000, 2650000, 2700000, 2750000, | |
329 | 2800000, 2850000, 2900000, 2950000, | |
330 | }; | |
331 | ||
332 | static const int dcdc3_voltages[] = { | |
333 | 2400000, 2450000, 2500000, 2550000, 2600000, | |
334 | 2650000, 2700000, 2750000, 2800000, 2850000, | |
335 | 2900000, 2950000, 3000000, 3050000, 3100000, | |
336 | 3150000, 3200000, 3250000, 3300000, 3350000, | |
337 | 3400000, 3450000, 3500000, 3550000, 3600000, | |
338 | }; | |
339 | ||
340 | static const int ldo1_voltages[] = { | |
341 | 4300000, 4350000, 4400000, 4450000, | |
342 | 4500000, 4550000, 4600000, 4650000, | |
343 | 4700000, 4750000, 4800000, 4850000, | |
344 | 4900000, 4950000, 5000000, 5050000, | |
345 | }; | |
346 | ||
347 | static const int ldo2_voltages[] = { | |
348 | 1100000, 1150000, 1200000, 1250000, | |
349 | 1300000, 1700000, 1750000, 1800000, | |
350 | 1850000, 1900000, 3150000, 3200000, | |
351 | 3250000, 3300000, 3350000, 3400000, | |
352 | }; | |
353 | ||
354 | static const int ldo_ilimsel[] = { | |
355 | 400000, 1500000 | |
356 | }; | |
357 | ||
358 | static const int usb_ilimsel[] = { | |
359 | 200000, 400000, 800000, 1000000 | |
360 | }; | |
361 | ||
362 | #define __MK_FIELD(_reg, _mask, _shift) \ | |
363 | { .reg = (_reg), .mask = (_mask), .shift = (_shift), } | |
364 | ||
365 | static const struct supply_info supply_info[N_REGULATORS] = { | |
366 | { | |
367 | .name = "DCDC1", | |
368 | .flags = FIXED_ILIMSEL, | |
369 | .n_voltages = ARRAY_SIZE(dcdc1_voltages), | |
370 | .voltages = dcdc1_voltages, | |
371 | .fixed_ilimsel = 2400000, | |
372 | .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK, | |
373 | DCDCDCDC1_EN_SHIFT), | |
374 | .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK, | |
375 | DCDC_VDCDC1_SHIFT), | |
376 | }, | |
377 | { | |
378 | .name = "DCDC2", | |
379 | .flags = FIXED_ILIMSEL, | |
380 | .n_voltages = ARRAY_SIZE(dcdc2_voltages), | |
381 | .voltages = dcdc2_voltages, | |
382 | .fixed_ilimsel = 1200000, | |
383 | .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK, | |
384 | DCDCDCDC2_EN_SHIFT), | |
385 | .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK, | |
386 | DCDC_VDCDC2_SHIFT), | |
387 | }, | |
388 | { | |
389 | .name = "DCDC3", | |
390 | .flags = FIXED_ILIMSEL, | |
391 | .n_voltages = ARRAY_SIZE(dcdc3_voltages), | |
392 | .voltages = dcdc3_voltages, | |
393 | .fixed_ilimsel = 1200000, | |
394 | .enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK, | |
395 | DCDCDCDC3_EN_SHIFT), | |
396 | .voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK, | |
397 | DCDC_VDCDC3_SHIFT), | |
398 | }, | |
399 | { | |
400 | .name = "LDO1", | |
401 | .n_voltages = ARRAY_SIZE(ldo1_voltages), | |
402 | .voltages = ldo1_voltages, | |
403 | .n_ilimsels = ARRAY_SIZE(ldo_ilimsel), | |
404 | .ilimsels = ldo_ilimsel, | |
405 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
406 | BLOCK_LDO1_SHIFT), | |
407 | .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK, | |
408 | LDO1_VSEL_SHIFT), | |
409 | .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK, | |
410 | LDO1_ILIM_SHIFT), | |
411 | }, | |
412 | { | |
413 | .name = "LDO2", | |
414 | .n_voltages = ARRAY_SIZE(ldo2_voltages), | |
415 | .voltages = ldo2_voltages, | |
416 | .n_ilimsels = ARRAY_SIZE(ldo_ilimsel), | |
417 | .ilimsels = ldo_ilimsel, | |
418 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
419 | BLOCK_LDO2_SHIFT), | |
420 | .voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK, | |
421 | LDO2_VSEL_SHIFT), | |
422 | .ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK, | |
423 | LDO2_ILIM_SHIFT), | |
424 | }, | |
425 | { | |
426 | .name = "USB", | |
427 | .flags = FIXED_VOLTAGE, | |
428 | .fixed_voltage = 5000000, | |
429 | .n_ilimsels = ARRAY_SIZE(usb_ilimsel), | |
430 | .ilimsels = usb_ilimsel, | |
431 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
432 | BLOCK_USB_SHIFT), | |
433 | .ilimsel = __MK_FIELD(REG_USB, USB_ILIM_MASK, | |
434 | USB_ILIM_SHIFT), | |
435 | }, | |
436 | { | |
437 | .name = "LCD", | |
438 | .flags = FIXED_VOLTAGE | FIXED_ILIMSEL, | |
439 | .fixed_voltage = 5000000, | |
440 | .fixed_ilimsel = 400000, | |
441 | .enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK, | |
442 | BLOCK_LCD_SHIFT), | |
443 | }, | |
444 | }; | |
445 | ||
446 | static int list_voltage(struct regulator_dev *rdev, unsigned selector) | |
447 | { | |
448 | const struct supply_info *info; | |
449 | struct tps6524x *hw; | |
450 | ||
451 | hw = rdev_get_drvdata(rdev); | |
452 | info = &supply_info[rdev_get_id(rdev)]; | |
453 | ||
454 | if (info->flags & FIXED_VOLTAGE) | |
455 | return selector ? -EINVAL : info->fixed_voltage; | |
456 | ||
457 | return ((selector < info->n_voltages) ? | |
458 | info->voltages[selector] : -EINVAL); | |
459 | } | |
460 | ||
f8ee3393 | 461 | static int set_voltage_sel(struct regulator_dev *rdev, unsigned selector) |
1394fd28 CC |
462 | { |
463 | const struct supply_info *info; | |
464 | struct tps6524x *hw; | |
1394fd28 CC |
465 | |
466 | hw = rdev_get_drvdata(rdev); | |
467 | info = &supply_info[rdev_get_id(rdev)]; | |
468 | ||
469 | if (info->flags & FIXED_VOLTAGE) | |
470 | return -EINVAL; | |
471 | ||
f8ee3393 | 472 | return write_field(hw, &info->voltage, selector); |
1394fd28 CC |
473 | } |
474 | ||
4af7c1d3 | 475 | static int get_voltage_sel(struct regulator_dev *rdev) |
1394fd28 CC |
476 | { |
477 | const struct supply_info *info; | |
478 | struct tps6524x *hw; | |
479 | int ret; | |
480 | ||
481 | hw = rdev_get_drvdata(rdev); | |
482 | info = &supply_info[rdev_get_id(rdev)]; | |
483 | ||
484 | if (info->flags & FIXED_VOLTAGE) | |
485 | return info->fixed_voltage; | |
486 | ||
487 | ret = read_field(hw, &info->voltage); | |
488 | if (ret < 0) | |
489 | return ret; | |
490 | if (WARN_ON(ret >= info->n_voltages)) | |
491 | return -EIO; | |
492 | ||
4af7c1d3 | 493 | return ret; |
1394fd28 CC |
494 | } |
495 | ||
496 | static int set_current_limit(struct regulator_dev *rdev, int min_uA, | |
497 | int max_uA) | |
498 | { | |
499 | const struct supply_info *info; | |
500 | struct tps6524x *hw; | |
501 | int i; | |
502 | ||
503 | hw = rdev_get_drvdata(rdev); | |
504 | info = &supply_info[rdev_get_id(rdev)]; | |
505 | ||
506 | if (info->flags & FIXED_ILIMSEL) | |
507 | return -EINVAL; | |
508 | ||
509 | for (i = 0; i < info->n_ilimsels; i++) | |
510 | if (min_uA <= info->ilimsels[i] && | |
511 | max_uA >= info->ilimsels[i]) | |
512 | break; | |
513 | ||
514 | if (i >= info->n_ilimsels) | |
515 | return -EINVAL; | |
516 | ||
517 | return write_field(hw, &info->ilimsel, i); | |
518 | } | |
519 | ||
520 | static int get_current_limit(struct regulator_dev *rdev) | |
521 | { | |
522 | const struct supply_info *info; | |
523 | struct tps6524x *hw; | |
524 | int ret; | |
525 | ||
526 | hw = rdev_get_drvdata(rdev); | |
527 | info = &supply_info[rdev_get_id(rdev)]; | |
528 | ||
529 | if (info->flags & FIXED_ILIMSEL) | |
530 | return info->fixed_ilimsel; | |
531 | ||
532 | ret = read_field(hw, &info->ilimsel); | |
533 | if (ret < 0) | |
534 | return ret; | |
535 | if (WARN_ON(ret >= info->n_ilimsels)) | |
536 | return -EIO; | |
537 | ||
538 | return info->ilimsels[ret]; | |
539 | } | |
540 | ||
541 | static int enable_supply(struct regulator_dev *rdev) | |
542 | { | |
543 | const struct supply_info *info; | |
544 | struct tps6524x *hw; | |
545 | ||
546 | hw = rdev_get_drvdata(rdev); | |
547 | info = &supply_info[rdev_get_id(rdev)]; | |
548 | ||
549 | return write_field(hw, &info->enable, 1); | |
550 | } | |
551 | ||
552 | static int disable_supply(struct regulator_dev *rdev) | |
553 | { | |
554 | const struct supply_info *info; | |
555 | struct tps6524x *hw; | |
556 | ||
557 | hw = rdev_get_drvdata(rdev); | |
558 | info = &supply_info[rdev_get_id(rdev)]; | |
559 | ||
560 | return write_field(hw, &info->enable, 0); | |
561 | } | |
562 | ||
563 | static int is_supply_enabled(struct regulator_dev *rdev) | |
564 | { | |
565 | const struct supply_info *info; | |
566 | struct tps6524x *hw; | |
567 | ||
568 | hw = rdev_get_drvdata(rdev); | |
569 | info = &supply_info[rdev_get_id(rdev)]; | |
570 | ||
571 | return read_field(hw, &info->enable); | |
572 | } | |
573 | ||
574 | static struct regulator_ops regulator_ops = { | |
575 | .is_enabled = is_supply_enabled, | |
576 | .enable = enable_supply, | |
577 | .disable = disable_supply, | |
4af7c1d3 | 578 | .get_voltage_sel = get_voltage_sel, |
f8ee3393 | 579 | .set_voltage_sel = set_voltage_sel, |
1394fd28 CC |
580 | .list_voltage = list_voltage, |
581 | .set_current_limit = set_current_limit, | |
582 | .get_current_limit = get_current_limit, | |
583 | }; | |
584 | ||
5362b098 | 585 | static int pmic_remove(struct spi_device *spi) |
1394fd28 CC |
586 | { |
587 | struct tps6524x *hw = spi_get_drvdata(spi); | |
588 | int i; | |
589 | ||
590 | if (!hw) | |
591 | return 0; | |
592 | for (i = 0; i < N_REGULATORS; i++) { | |
593 | if (hw->rdev[i]) | |
594 | regulator_unregister(hw->rdev[i]); | |
595 | hw->rdev[i] = NULL; | |
596 | } | |
597 | spi_set_drvdata(spi, NULL); | |
1394fd28 CC |
598 | return 0; |
599 | } | |
600 | ||
601 | static int __devinit pmic_probe(struct spi_device *spi) | |
602 | { | |
603 | struct tps6524x *hw; | |
604 | struct device *dev = &spi->dev; | |
605 | const struct supply_info *info = supply_info; | |
606 | struct regulator_init_data *init_data; | |
c172708d | 607 | struct regulator_config config = { }; |
1394fd28 CC |
608 | int ret = 0, i; |
609 | ||
610 | init_data = dev->platform_data; | |
611 | if (!init_data) { | |
612 | dev_err(dev, "could not find regulator platform data\n"); | |
613 | return -EINVAL; | |
614 | } | |
615 | ||
9eb0c421 | 616 | hw = devm_kzalloc(&spi->dev, sizeof(struct tps6524x), GFP_KERNEL); |
1394fd28 CC |
617 | if (!hw) { |
618 | dev_err(dev, "cannot allocate regulator private data\n"); | |
619 | return -ENOMEM; | |
620 | } | |
621 | spi_set_drvdata(spi, hw); | |
622 | ||
623 | memset(hw, 0, sizeof(struct tps6524x)); | |
624 | hw->dev = dev; | |
625 | hw->spi = spi_dev_get(spi); | |
626 | mutex_init(&hw->lock); | |
627 | ||
628 | for (i = 0; i < N_REGULATORS; i++, info++, init_data++) { | |
629 | hw->desc[i].name = info->name; | |
630 | hw->desc[i].id = i; | |
631 | hw->desc[i].n_voltages = info->n_voltages; | |
632 | hw->desc[i].ops = ®ulator_ops; | |
633 | hw->desc[i].type = REGULATOR_VOLTAGE; | |
634 | hw->desc[i].owner = THIS_MODULE; | |
635 | ||
636 | if (info->flags & FIXED_VOLTAGE) | |
637 | hw->desc[i].n_voltages = 1; | |
638 | ||
c172708d MB |
639 | config.dev = dev; |
640 | config.init_data = init_data; | |
641 | config.driver_data = hw; | |
642 | ||
643 | hw->rdev[i] = regulator_register(&hw->desc[i], &config); | |
1394fd28 CC |
644 | if (IS_ERR(hw->rdev[i])) { |
645 | ret = PTR_ERR(hw->rdev[i]); | |
646 | hw->rdev[i] = NULL; | |
647 | goto fail; | |
648 | } | |
649 | } | |
650 | ||
651 | return 0; | |
652 | ||
653 | fail: | |
654 | pmic_remove(spi); | |
655 | return ret; | |
656 | } | |
657 | ||
658 | static struct spi_driver pmic_driver = { | |
659 | .probe = pmic_probe, | |
660 | .remove = __devexit_p(pmic_remove), | |
661 | .driver = { | |
662 | .name = "tps6524x", | |
663 | .owner = THIS_MODULE, | |
664 | }, | |
665 | }; | |
666 | ||
173f24d1 | 667 | module_spi_driver(pmic_driver); |
1394fd28 CC |
668 | |
669 | MODULE_DESCRIPTION("TPS6524X PMIC Driver"); | |
670 | MODULE_AUTHOR("Cyril Chemparathy"); | |
671 | MODULE_LICENSE("GPL"); | |
672 | MODULE_ALIAS("spi:tps6524x"); |