ALSA: hda_intel: add position_fix quirk for Asus K53E
[deliverable/linux.git] / drivers / regulator / tps6586x-regulator.c
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/module.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/slab.h>
21 #include <linux/platform_device.h>
22 #include <linux/regulator/driver.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/mfd/tps6586x.h>
25
26 /* supply control and voltage setting */
27 #define TPS6586X_SUPPLYENA 0x10
28 #define TPS6586X_SUPPLYENB 0x11
29 #define TPS6586X_SUPPLYENC 0x12
30 #define TPS6586X_SUPPLYEND 0x13
31 #define TPS6586X_SUPPLYENE 0x14
32 #define TPS6586X_VCC1 0x20
33 #define TPS6586X_VCC2 0x21
34 #define TPS6586X_SM1V1 0x23
35 #define TPS6586X_SM1V2 0x24
36 #define TPS6586X_SM1SL 0x25
37 #define TPS6586X_SM0V1 0x26
38 #define TPS6586X_SM0V2 0x27
39 #define TPS6586X_SM0SL 0x28
40 #define TPS6586X_LDO2AV1 0x29
41 #define TPS6586X_LDO2AV2 0x2A
42 #define TPS6586X_LDO2BV1 0x2F
43 #define TPS6586X_LDO2BV2 0x30
44 #define TPS6586X_LDO4V1 0x32
45 #define TPS6586X_LDO4V2 0x33
46
47 /* converter settings */
48 #define TPS6586X_SUPPLYV1 0x41
49 #define TPS6586X_SUPPLYV2 0x42
50 #define TPS6586X_SUPPLYV3 0x43
51 #define TPS6586X_SUPPLYV4 0x44
52 #define TPS6586X_SUPPLYV5 0x45
53 #define TPS6586X_SUPPLYV6 0x46
54 #define TPS6586X_SMODE1 0x47
55 #define TPS6586X_SMODE2 0x48
56
57 struct tps6586x_regulator {
58 struct regulator_desc desc;
59
60 int volt_reg;
61 int volt_shift;
62 int volt_nbits;
63 int enable_bit[2];
64 int enable_reg[2];
65
66 /* for DVM regulators */
67 int go_reg;
68 int go_bit;
69 };
70
71 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
72 {
73 return rdev_get_dev(rdev)->parent;
74 }
75
76 static int tps6586x_set_voltage_sel(struct regulator_dev *rdev,
77 unsigned selector)
78 {
79 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
80 struct device *parent = to_tps6586x_dev(rdev);
81 int ret, val, rid = rdev_get_id(rdev);
82 uint8_t mask;
83
84 val = selector << ri->volt_shift;
85 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
86
87 ret = tps6586x_update(parent, ri->volt_reg, val, mask);
88 if (ret)
89 return ret;
90
91 /* Update go bit for DVM regulators */
92 switch (rid) {
93 case TPS6586X_ID_LDO_2:
94 case TPS6586X_ID_LDO_4:
95 case TPS6586X_ID_SM_0:
96 case TPS6586X_ID_SM_1:
97 ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
98 break;
99 }
100 return ret;
101 }
102
103 static int tps6586x_get_voltage_sel(struct regulator_dev *rdev)
104 {
105 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
106 struct device *parent = to_tps6586x_dev(rdev);
107 uint8_t val, mask;
108 int ret;
109
110 ret = tps6586x_read(parent, ri->volt_reg, &val);
111 if (ret)
112 return ret;
113
114 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
115 val = (val & mask) >> ri->volt_shift;
116
117 if (val >= ri->desc.n_voltages)
118 BUG();
119
120 return val;
121 }
122
123 static int tps6586x_regulator_enable(struct regulator_dev *rdev)
124 {
125 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
126 struct device *parent = to_tps6586x_dev(rdev);
127
128 return tps6586x_set_bits(parent, ri->enable_reg[0],
129 1 << ri->enable_bit[0]);
130 }
131
132 static int tps6586x_regulator_disable(struct regulator_dev *rdev)
133 {
134 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
135 struct device *parent = to_tps6586x_dev(rdev);
136
137 return tps6586x_clr_bits(parent, ri->enable_reg[0],
138 1 << ri->enable_bit[0]);
139 }
140
141 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
142 {
143 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
144 struct device *parent = to_tps6586x_dev(rdev);
145 uint8_t reg_val;
146 int ret;
147
148 ret = tps6586x_read(parent, ri->enable_reg[0], &reg_val);
149 if (ret)
150 return ret;
151
152 return !!(reg_val & (1 << ri->enable_bit[0]));
153 }
154
155 static struct regulator_ops tps6586x_regulator_ops = {
156 .list_voltage = regulator_list_voltage_table,
157 .get_voltage_sel = tps6586x_get_voltage_sel,
158 .set_voltage_sel = tps6586x_set_voltage_sel,
159
160 .is_enabled = tps6586x_regulator_is_enabled,
161 .enable = tps6586x_regulator_enable,
162 .disable = tps6586x_regulator_disable,
163 };
164
165 static const unsigned int tps6586x_ldo0_voltages[] = {
166 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
167 };
168
169 static const unsigned int tps6586x_ldo4_voltages[] = {
170 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000,
171 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000,
172 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000,
173 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000,
174 };
175
176 static const unsigned int tps6586x_ldo_voltages[] = {
177 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
178 };
179
180 static const unsigned int tps6586x_sm2_voltages[] = {
181 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
182 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
183 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
184 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
185 };
186
187 static const unsigned int tps6586x_dvm_voltages[] = {
188 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
189 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
190 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
191 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
192 };
193
194 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
195 ereg0, ebit0, ereg1, ebit1) \
196 .desc = { \
197 .supply_name = _pin_name, \
198 .name = "REG-" #_id, \
199 .ops = &tps6586x_regulator_ops, \
200 .type = REGULATOR_VOLTAGE, \
201 .id = TPS6586X_ID_##_id, \
202 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
203 .volt_table = tps6586x_##vdata##_voltages, \
204 .owner = THIS_MODULE, \
205 }, \
206 .volt_reg = TPS6586X_##vreg, \
207 .volt_shift = (shift), \
208 .volt_nbits = (nbits), \
209 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
210 .enable_bit[0] = (ebit0), \
211 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
212 .enable_bit[1] = (ebit1),
213
214 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
215 .go_reg = TPS6586X_##goreg, \
216 .go_bit = (gobit),
217
218 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
219 ereg0, ebit0, ereg1, ebit1) \
220 { \
221 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
222 ereg0, ebit0, ereg1, ebit1) \
223 }
224
225 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
226 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
227 { \
228 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
229 ereg0, ebit0, ereg1, ebit1) \
230 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
231 }
232
233 static struct tps6586x_regulator tps6586x_regulator[] = {
234 TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
235 TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
236 TPS6586X_LDO(LDO_5, NULL, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
237 TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
238 TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
239 TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
240 TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
241 TPS6586X_LDO(LDO_RTC, NULL, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
242 TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
243 TPS6586X_LDO(SM_2, "sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
244
245 TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
246 ENB, 3, VCC2, 6),
247 TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
248 END, 3, VCC1, 6),
249 TPS6586X_DVM(SM_0, "sm0", dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2),
250 TPS6586X_DVM(SM_1, "sm1", dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0),
251 };
252
253 /*
254 * TPS6586X has 2 enable bits that are OR'ed to determine the actual
255 * regulator state. Clearing one of this bits allows switching
256 * regulator on and of with single register write.
257 */
258 static inline int tps6586x_regulator_preinit(struct device *parent,
259 struct tps6586x_regulator *ri)
260 {
261 uint8_t val1, val2;
262 int ret;
263
264 if (ri->enable_reg[0] == ri->enable_reg[1] &&
265 ri->enable_bit[0] == ri->enable_bit[1])
266 return 0;
267
268 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
269 if (ret)
270 return ret;
271
272 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
273 if (ret)
274 return ret;
275
276 if (!(val2 & (1 << ri->enable_bit[1])))
277 return 0;
278
279 /*
280 * The regulator is on, but it's enabled with the bit we don't
281 * want to use, so we switch the enable bits
282 */
283 if (!(val1 & (1 << ri->enable_bit[0]))) {
284 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
285 1 << ri->enable_bit[0]);
286 if (ret)
287 return ret;
288 }
289
290 return tps6586x_clr_bits(parent, ri->enable_reg[1],
291 1 << ri->enable_bit[1]);
292 }
293
294 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
295 {
296 struct device *parent = pdev->dev.parent;
297 struct regulator_init_data *p = pdev->dev.platform_data;
298 struct tps6586x_settings *setting = p->driver_data;
299 uint8_t reg;
300
301 if (setting == NULL)
302 return 0;
303
304 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
305 return 0;
306
307 /* only SM0 and SM1 can have the slew rate settings */
308 switch (pdev->id) {
309 case TPS6586X_ID_SM_0:
310 reg = TPS6586X_SM0SL;
311 break;
312 case TPS6586X_ID_SM_1:
313 reg = TPS6586X_SM1SL;
314 break;
315 default:
316 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
317 return -EINVAL;
318 }
319
320 return tps6586x_write(parent, reg,
321 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
322 }
323
324 static inline struct tps6586x_regulator *find_regulator_info(int id)
325 {
326 struct tps6586x_regulator *ri;
327 int i;
328
329 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
330 ri = &tps6586x_regulator[i];
331 if (ri->desc.id == id)
332 return ri;
333 }
334 return NULL;
335 }
336
337 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
338 {
339 struct tps6586x_regulator *ri = NULL;
340 struct regulator_config config = { };
341 struct regulator_dev *rdev;
342 int id = pdev->id;
343 int err;
344
345 dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
346
347 ri = find_regulator_info(id);
348 if (ri == NULL) {
349 dev_err(&pdev->dev, "invalid regulator ID specified\n");
350 return -EINVAL;
351 }
352
353 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
354 if (err)
355 return err;
356
357 config.dev = pdev->dev.parent;
358 config.of_node = pdev->dev.of_node;
359 config.init_data = pdev->dev.platform_data;
360 config.driver_data = ri;
361
362 rdev = regulator_register(&ri->desc, &config);
363 if (IS_ERR(rdev)) {
364 dev_err(&pdev->dev, "failed to register regulator %s\n",
365 ri->desc.name);
366 return PTR_ERR(rdev);
367 }
368
369 platform_set_drvdata(pdev, rdev);
370
371 return tps6586x_regulator_set_slew_rate(pdev);
372 }
373
374 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
375 {
376 struct regulator_dev *rdev = platform_get_drvdata(pdev);
377
378 regulator_unregister(rdev);
379 return 0;
380 }
381
382 static struct platform_driver tps6586x_regulator_driver = {
383 .driver = {
384 .name = "tps6586x-regulator",
385 .owner = THIS_MODULE,
386 },
387 .probe = tps6586x_regulator_probe,
388 .remove = __devexit_p(tps6586x_regulator_remove),
389 };
390
391 static int __init tps6586x_regulator_init(void)
392 {
393 return platform_driver_register(&tps6586x_regulator_driver);
394 }
395 subsys_initcall(tps6586x_regulator_init);
396
397 static void __exit tps6586x_regulator_exit(void)
398 {
399 platform_driver_unregister(&tps6586x_regulator_driver);
400 }
401 module_exit(tps6586x_regulator_exit);
402
403 MODULE_LICENSE("GPL");
404 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
405 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
406 MODULE_ALIAS("platform:tps6586x-regulator");
This page took 0.059293 seconds and 5 git commands to generate.