diff options
Diffstat (limited to 'drivers/regulator/tps6586x-regulator.c')
-rw-r--r-- | drivers/regulator/tps6586x-regulator.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c new file mode 100644 index 00000000000..8cff1413a14 --- /dev/null +++ b/drivers/regulator/tps6586x-regulator.c | |||
@@ -0,0 +1,396 @@ | |||
1 | /* | ||
2 | * Regulator driver for TI TPS6586x | ||
3 | * | ||
4 | * Copyright (C) 2010 Compulab Ltd. | ||
5 | * Author: Mike Rapoport <mike@compulab.co.il> | ||
6 | * | ||
7 | * Based on da903x | ||
8 | * Copyright (C) 2006-2008 Marvell International Ltd. | ||
9 | * Copyright (C) 2008 Compulab Ltd. | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or modify | ||
12 | * it under the terms of the GNU General Public License version 2 as | ||
13 | * published by the Free Software Foundation. | ||
14 | */ | ||
15 | |||
16 | #include <linux/kernel.h> | ||
17 | #include <linux/init.h> | ||
18 | #include <linux/err.h> | ||
19 | #include <linux/slab.h> | ||
20 | #include <linux/platform_device.h> | ||
21 | #include <linux/regulator/driver.h> | ||
22 | #include <linux/regulator/machine.h> | ||
23 | #include <linux/mfd/tps6586x.h> | ||
24 | |||
25 | /* supply control and voltage setting */ | ||
26 | #define TPS6586X_SUPPLYENA 0x10 | ||
27 | #define TPS6586X_SUPPLYENB 0x11 | ||
28 | #define TPS6586X_SUPPLYENC 0x12 | ||
29 | #define TPS6586X_SUPPLYEND 0x13 | ||
30 | #define TPS6586X_SUPPLYENE 0x14 | ||
31 | #define TPS6586X_VCC1 0x20 | ||
32 | #define TPS6586X_VCC2 0x21 | ||
33 | #define TPS6586X_SM1V1 0x23 | ||
34 | #define TPS6586X_SM1V2 0x24 | ||
35 | #define TPS6586X_SM1SL 0x25 | ||
36 | #define TPS6586X_SM0V1 0x26 | ||
37 | #define TPS6586X_SM0V2 0x27 | ||
38 | #define TPS6586X_SM0SL 0x28 | ||
39 | #define TPS6586X_LDO2AV1 0x29 | ||
40 | #define TPS6586X_LDO2AV2 0x2A | ||
41 | #define TPS6586X_LDO2BV1 0x2F | ||
42 | #define TPS6586X_LDO2BV2 0x30 | ||
43 | #define TPS6586X_LDO4V1 0x32 | ||
44 | #define TPS6586X_LDO4V2 0x33 | ||
45 | |||
46 | /* converter settings */ | ||
47 | #define TPS6586X_SUPPLYV1 0x41 | ||
48 | #define TPS6586X_SUPPLYV2 0x42 | ||
49 | #define TPS6586X_SUPPLYV3 0x43 | ||
50 | #define TPS6586X_SUPPLYV4 0x44 | ||
51 | #define TPS6586X_SUPPLYV5 0x45 | ||
52 | #define TPS6586X_SUPPLYV6 0x46 | ||
53 | #define TPS6586X_SMODE1 0x47 | ||
54 | #define TPS6586X_SMODE2 0x48 | ||
55 | |||
56 | struct tps6586x_regulator { | ||
57 | struct regulator_desc desc; | ||
58 | |||
59 | int volt_reg; | ||
60 | int volt_shift; | ||
61 | int volt_nbits; | ||
62 | int enable_bit[2]; | ||
63 | int enable_reg[2]; | ||
64 | |||
65 | int *voltages; | ||
66 | |||
67 | /* for DVM regulators */ | ||
68 | int go_reg; | ||
69 | int go_bit; | ||
70 | }; | ||
71 | |||
72 | static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) | ||
73 | { | ||
74 | return rdev_get_dev(rdev)->parent->parent; | ||
75 | } | ||
76 | |||
77 | static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev, | ||
78 | unsigned selector) | ||
79 | { | ||
80 | struct tps6586x_regulator *info = rdev_get_drvdata(rdev); | ||
81 | |||
82 | return info->voltages[selector] * 1000; | ||
83 | } | ||
84 | |||
85 | |||
86 | static int __tps6586x_ldo_set_voltage(struct device *parent, | ||
87 | struct tps6586x_regulator *ri, | ||
88 | int min_uV, int max_uV) | ||
89 | { | ||
90 | int val, uV; | ||
91 | uint8_t mask; | ||
92 | |||
93 | for (val = 0; val < ri->desc.n_voltages; val++) { | ||
94 | uV = ri->voltages[val] * 1000; | ||
95 | |||
96 | /* LDO0 has minimal voltage 1.2 rather than 1.25 */ | ||
97 | if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0) | ||
98 | uV -= 50 * 1000; | ||
99 | |||
100 | /* use the first in-range value */ | ||
101 | if (min_uV <= uV && uV <= max_uV) { | ||
102 | |||
103 | val <<= ri->volt_shift; | ||
104 | mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; | ||
105 | |||
106 | return tps6586x_update(parent, ri->volt_reg, val, mask); | ||
107 | } | ||
108 | } | ||
109 | |||
110 | return -EINVAL; | ||
111 | } | ||
112 | |||
113 | static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev, | ||
114 | int min_uV, int max_uV) | ||
115 | { | ||
116 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | ||
117 | struct device *parent = to_tps6586x_dev(rdev); | ||
118 | |||
119 | return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV); | ||
120 | } | ||
121 | |||
122 | static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev) | ||
123 | { | ||
124 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | ||
125 | struct device *parent = to_tps6586x_dev(rdev); | ||
126 | uint8_t val, mask; | ||
127 | int ret; | ||
128 | |||
129 | ret = tps6586x_read(parent, ri->volt_reg, &val); | ||
130 | if (ret) | ||
131 | return ret; | ||
132 | |||
133 | mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; | ||
134 | val = (val & mask) >> ri->volt_shift; | ||
135 | |||
136 | if (val > ri->desc.n_voltages) | ||
137 | BUG(); | ||
138 | |||
139 | return ri->voltages[val] * 1000; | ||
140 | } | ||
141 | |||
142 | static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev, | ||
143 | int min_uV, int max_uV) | ||
144 | { | ||
145 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | ||
146 | struct device *parent = to_tps6586x_dev(rdev); | ||
147 | int ret; | ||
148 | |||
149 | ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV); | ||
150 | if (ret) | ||
151 | return ret; | ||
152 | |||
153 | return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit); | ||
154 | } | ||
155 | |||
156 | static int tps6586x_regulator_enable(struct regulator_dev *rdev) | ||
157 | { | ||
158 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | ||
159 | struct device *parent = to_tps6586x_dev(rdev); | ||
160 | |||
161 | return tps6586x_set_bits(parent, ri->enable_reg[0], | ||
162 | 1 << ri->enable_bit[0]); | ||
163 | } | ||
164 | |||
165 | static int tps6586x_regulator_disable(struct regulator_dev *rdev) | ||
166 | { | ||
167 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | ||
168 | struct device *parent = to_tps6586x_dev(rdev); | ||
169 | |||
170 | return tps6586x_clr_bits(parent, ri->enable_reg[0], | ||
171 | 1 << ri->enable_bit[0]); | ||
172 | } | ||
173 | |||
174 | static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev) | ||
175 | { | ||
176 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | ||
177 | struct device *parent = to_tps6586x_dev(rdev); | ||
178 | uint8_t reg_val; | ||
179 | int ret; | ||
180 | |||
181 | ret = tps6586x_read(parent, ri->enable_reg[0], ®_val); | ||
182 | if (ret) | ||
183 | return ret; | ||
184 | |||
185 | return !!(reg_val & (1 << ri->enable_bit[0])); | ||
186 | } | ||
187 | |||
188 | static struct regulator_ops tps6586x_regulator_ldo_ops = { | ||
189 | .list_voltage = tps6586x_ldo_list_voltage, | ||
190 | .get_voltage = tps6586x_ldo_get_voltage, | ||
191 | .set_voltage = tps6586x_ldo_set_voltage, | ||
192 | |||
193 | .is_enabled = tps6586x_regulator_is_enabled, | ||
194 | .enable = tps6586x_regulator_enable, | ||
195 | .disable = tps6586x_regulator_disable, | ||
196 | }; | ||
197 | |||
198 | static struct regulator_ops tps6586x_regulator_dvm_ops = { | ||
199 | .list_voltage = tps6586x_ldo_list_voltage, | ||
200 | .get_voltage = tps6586x_ldo_get_voltage, | ||
201 | .set_voltage = tps6586x_dvm_set_voltage, | ||
202 | |||
203 | .is_enabled = tps6586x_regulator_is_enabled, | ||
204 | .enable = tps6586x_regulator_enable, | ||
205 | .disable = tps6586x_regulator_disable, | ||
206 | }; | ||
207 | |||
208 | static int tps6586x_ldo_voltages[] = { | ||
209 | 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300, | ||
210 | }; | ||
211 | |||
212 | static int tps6586x_ldo4_voltages[] = { | ||
213 | 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875, | ||
214 | 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075, | ||
215 | 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275, | ||
216 | 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475, | ||
217 | }; | ||
218 | |||
219 | static int tps6586x_sm2_voltages[] = { | ||
220 | 3000, 3050, 3100, 3150, 3200, 3250, 3300, 3350, | ||
221 | 3400, 3450, 3500, 3550, 3600, 3650, 3700, 3750, | ||
222 | 3800, 3850, 3900, 3950, 4000, 4050, 4100, 4150, | ||
223 | 4200, 4250, 4300, 4350, 4400, 4450, 4500, 4550, | ||
224 | }; | ||
225 | |||
226 | static int tps6586x_dvm_voltages[] = { | ||
227 | 725, 750, 775, 800, 825, 850, 875, 900, | ||
228 | 925, 950, 975, 1000, 1025, 1050, 1075, 1100, | ||
229 | 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300, | ||
230 | 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500, | ||
231 | }; | ||
232 | |||
233 | #define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \ | ||
234 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ | ||
235 | { \ | ||
236 | .desc = { \ | ||
237 | .name = "REG-" #_id, \ | ||
238 | .ops = &tps6586x_regulator_##_ops, \ | ||
239 | .type = REGULATOR_VOLTAGE, \ | ||
240 | .id = TPS6586X_ID_##_id, \ | ||
241 | .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ | ||
242 | .owner = THIS_MODULE, \ | ||
243 | }, \ | ||
244 | .volt_reg = TPS6586X_##vreg, \ | ||
245 | .volt_shift = (shift), \ | ||
246 | .volt_nbits = (nbits), \ | ||
247 | .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ | ||
248 | .enable_bit[0] = (ebit0), \ | ||
249 | .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ | ||
250 | .enable_bit[1] = (ebit1), \ | ||
251 | .voltages = tps6586x_##vdata##_voltages, \ | ||
252 | } | ||
253 | |||
254 | #define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \ | ||
255 | ereg0, ebit0, ereg1, ebit1) \ | ||
256 | TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits, \ | ||
257 | ereg0, ebit0, ereg1, ebit1, 0, 0) | ||
258 | |||
259 | #define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \ | ||
260 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ | ||
261 | TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits, \ | ||
262 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) | ||
263 | |||
264 | static struct tps6586x_regulator tps6586x_regulator[] = { | ||
265 | TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0), | ||
266 | TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), | ||
267 | TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), | ||
268 | TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), | ||
269 | TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), | ||
270 | TPS6586X_LDO(LDO_8, ldo, SUPPLYV1, 5, 3, ENC, 6, END, 6), | ||
271 | TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), | ||
272 | TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, ENE, 7, ENE, 7), | ||
273 | TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), | ||
274 | TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 1, END, 1), | ||
275 | |||
276 | TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6), | ||
277 | TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6), | ||
278 | TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2), | ||
279 | TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0), | ||
280 | }; | ||
281 | |||
282 | /* | ||
283 | * TPS6586X has 2 enable bits that are OR'ed to determine the actual | ||
284 | * regulator state. Clearing one of this bits allows switching | ||
285 | * regulator on and of with single register write. | ||
286 | */ | ||
287 | static inline int tps6586x_regulator_preinit(struct device *parent, | ||
288 | struct tps6586x_regulator *ri) | ||
289 | { | ||
290 | uint8_t val1, val2; | ||
291 | int ret; | ||
292 | |||
293 | ret = tps6586x_read(parent, ri->enable_reg[0], &val1); | ||
294 | if (ret) | ||
295 | return ret; | ||
296 | |||
297 | ret = tps6586x_read(parent, ri->enable_reg[1], &val2); | ||
298 | if (ret) | ||
299 | return ret; | ||
300 | |||
301 | if (!(val2 & ri->enable_bit[1])) | ||
302 | return 0; | ||
303 | |||
304 | /* | ||
305 | * The regulator is on, but it's enabled with the bit we don't | ||
306 | * want to use, so we switch the enable bits | ||
307 | */ | ||
308 | if (!(val1 & ri->enable_bit[0])) { | ||
309 | ret = tps6586x_set_bits(parent, ri->enable_reg[0], | ||
310 | 1 << ri->enable_bit[0]); | ||
311 | if (ret) | ||
312 | return ret; | ||
313 | } | ||
314 | |||
315 | return tps6586x_clr_bits(parent, ri->enable_reg[1], | ||
316 | 1 << ri->enable_bit[1]); | ||
317 | } | ||
318 | |||
319 | static inline struct tps6586x_regulator *find_regulator_info(int id) | ||
320 | { | ||
321 | struct tps6586x_regulator *ri; | ||
322 | int i; | ||
323 | |||
324 | for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { | ||
325 | ri = &tps6586x_regulator[i]; | ||
326 | if (ri->desc.id == id) | ||
327 | return ri; | ||
328 | } | ||
329 | return NULL; | ||
330 | } | ||
331 | |||
332 | static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) | ||
333 | { | ||
334 | struct tps6586x_regulator *ri = NULL; | ||
335 | struct regulator_dev *rdev; | ||
336 | int id = pdev->id; | ||
337 | int err; | ||
338 | |||
339 | dev_dbg(&pdev->dev, "Probing reulator %d\n", id); | ||
340 | |||
341 | ri = find_regulator_info(id); | ||
342 | if (ri == NULL) { | ||
343 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | ||
344 | return -EINVAL; | ||
345 | } | ||
346 | |||
347 | err = tps6586x_regulator_preinit(pdev->dev.parent, ri); | ||
348 | if (err) | ||
349 | return err; | ||
350 | |||
351 | rdev = regulator_register(&ri->desc, &pdev->dev, | ||
352 | pdev->dev.platform_data, ri); | ||
353 | if (IS_ERR(rdev)) { | ||
354 | dev_err(&pdev->dev, "failed to register regulator %s\n", | ||
355 | ri->desc.name); | ||
356 | return PTR_ERR(rdev); | ||
357 | } | ||
358 | |||
359 | platform_set_drvdata(pdev, rdev); | ||
360 | |||
361 | return 0; | ||
362 | } | ||
363 | |||
364 | static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) | ||
365 | { | ||
366 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | ||
367 | |||
368 | regulator_unregister(rdev); | ||
369 | return 0; | ||
370 | } | ||
371 | |||
372 | static struct platform_driver tps6586x_regulator_driver = { | ||
373 | .driver = { | ||
374 | .name = "tps6586x-regulator", | ||
375 | .owner = THIS_MODULE, | ||
376 | }, | ||
377 | .probe = tps6586x_regulator_probe, | ||
378 | .remove = __devexit_p(tps6586x_regulator_remove), | ||
379 | }; | ||
380 | |||
381 | static int __init tps6586x_regulator_init(void) | ||
382 | { | ||
383 | return platform_driver_register(&tps6586x_regulator_driver); | ||
384 | } | ||
385 | subsys_initcall(tps6586x_regulator_init); | ||
386 | |||
387 | static void __exit tps6586x_regulator_exit(void) | ||
388 | { | ||
389 | platform_driver_unregister(&tps6586x_regulator_driver); | ||
390 | } | ||
391 | module_exit(tps6586x_regulator_exit); | ||
392 | |||
393 | MODULE_LICENSE("GPL"); | ||
394 | MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); | ||
395 | MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); | ||
396 | MODULE_ALIAS("platform:tps6586x-regulator"); | ||