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Mike Rapoport49610232010-07-27 14:03:01 +03001/*
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#define DEBUG
17#include <linux/kernel.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
57struct 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 int *voltages;
67
68 /* for DVM regulators */
69 int go_reg;
70 int go_bit;
71};
72
73static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
74{
75 return rdev_get_dev(rdev)->parent->parent;
76}
77
78static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev,
79 unsigned selector)
80{
81 struct tps6586x_regulator *info = rdev_get_drvdata(rdev);
82
Gary King4cc2e392010-07-30 22:58:58 +030083 return info->voltages[selector] * 1000;
Mike Rapoport49610232010-07-27 14:03:01 +030084}
85
86
87static int __tps6586x_ldo_set_voltage(struct device *parent,
88 struct tps6586x_regulator *ri,
89 int min_uV, int max_uV)
90{
91 int val, uV;
92 uint8_t mask;
93
94 for (val = 0; val < ri->desc.n_voltages; val++) {
95 uV = ri->voltages[val] * 1000;
96
97 /* LDO0 has minimal voltage 1.2 rather than 1.25 */
98 if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0)
99 uV -= 50 * 1000;
100
101 /* use the first in-range value */
102 if (min_uV <= uV && uV <= max_uV) {
103
104 val <<= ri->volt_shift;
105 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
106
107 return tps6586x_update(parent, ri->volt_reg, val, mask);
108 }
109 }
110
111 return -EINVAL;
112}
113
114static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev,
115 int min_uV, int max_uV)
116{
117 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
118 struct device *parent = to_tps6586x_dev(rdev);
119
120 return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV);
121}
122
123static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev)
124{
125 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
126 struct device *parent = to_tps6586x_dev(rdev);
127 uint8_t val, mask;
128 int ret;
129
130 ret = tps6586x_read(parent, ri->volt_reg, &val);
131 if (ret)
132 return ret;
133
134 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
135 val = (val & mask) >> ri->volt_shift;
136
137 if (val > ri->desc.n_voltages)
138 BUG();
139
Gary King4cc2e392010-07-30 22:58:58 +0300140 return ri->voltages[val] * 1000;
Mike Rapoport49610232010-07-27 14:03:01 +0300141}
142
143static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev,
144 int min_uV, int max_uV)
145{
146 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
147 struct device *parent = to_tps6586x_dev(rdev);
148 int ret;
149
150 ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV);
151 if (ret)
152 return ret;
153
154 return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit);
155}
156
157static int tps6586x_regulator_enable(struct regulator_dev *rdev)
158{
159 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
160 struct device *parent = to_tps6586x_dev(rdev);
161
162 return tps6586x_set_bits(parent, ri->enable_reg[0],
163 1 << ri->enable_bit[0]);
164}
165
166static int tps6586x_regulator_disable(struct regulator_dev *rdev)
167{
168 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
169 struct device *parent = to_tps6586x_dev(rdev);
170
171 return tps6586x_clr_bits(parent, ri->enable_reg[0],
172 1 << ri->enable_bit[0]);
173}
174
175static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
176{
177 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
178 struct device *parent = to_tps6586x_dev(rdev);
179 uint8_t reg_val;
180 int ret;
181
182 ret = tps6586x_read(parent, ri->enable_reg[0], &reg_val);
183 if (ret)
184 return ret;
185
186 return !!(reg_val & (1 << ri->enable_bit[0]));
187}
188
189static struct regulator_ops tps6586x_regulator_ldo_ops = {
190 .list_voltage = tps6586x_ldo_list_voltage,
191 .get_voltage = tps6586x_ldo_get_voltage,
192 .set_voltage = tps6586x_ldo_set_voltage,
193
194 .is_enabled = tps6586x_regulator_is_enabled,
195 .enable = tps6586x_regulator_enable,
196 .disable = tps6586x_regulator_disable,
197};
198
199static struct regulator_ops tps6586x_regulator_dvm_ops = {
200 .list_voltage = tps6586x_ldo_list_voltage,
201 .get_voltage = tps6586x_ldo_get_voltage,
202 .set_voltage = tps6586x_dvm_set_voltage,
203
204 .is_enabled = tps6586x_regulator_is_enabled,
205 .enable = tps6586x_regulator_enable,
206 .disable = tps6586x_regulator_disable,
207};
208
209static int tps6586x_ldo_voltages[] = {
210 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300,
211};
212
213static int tps6586x_ldo4_voltages[] = {
214 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
215 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075,
216 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275,
217 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475,
218};
219
Gary King4cc2e392010-07-30 22:58:58 +0300220static int tps6586x_sm2_voltages[] = {
221 3000, 3050, 3100, 3150, 3200, 3250, 3300, 3350,
222 3400, 3450, 3500, 3550, 3600, 3650, 3700, 3750,
223 3800, 3850, 3900, 3950, 4000, 4050, 4100, 4150,
224 4200, 4250, 4300, 4350, 4400, 4450, 4500, 4550,
225};
226
Mike Rapoport49610232010-07-27 14:03:01 +0300227static int tps6586x_dvm_voltages[] = {
228 725, 750, 775, 800, 825, 850, 875, 900,
229 925, 950, 975, 1000, 1025, 1050, 1075, 1100,
230 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
231 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
232};
233
234#define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \
235 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
236{ \
237 .desc = { \
238 .name = "REG-" #_id, \
239 .ops = &tps6586x_regulator_##_ops, \
240 .type = REGULATOR_VOLTAGE, \
241 .id = TPS6586X_ID_##_id, \
242 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
243 .owner = THIS_MODULE, \
244 }, \
245 .volt_reg = TPS6586X_##vreg, \
246 .volt_shift = (shift), \
247 .volt_nbits = (nbits), \
248 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
249 .enable_bit[0] = (ebit0), \
250 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
251 .enable_bit[1] = (ebit1), \
252 .voltages = tps6586x_##vdata##_voltages, \
253}
254
255#define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \
256 ereg0, ebit0, ereg1, ebit1) \
257 TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits, \
258 ereg0, ebit0, ereg1, ebit1, 0, 0)
259
260#define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \
261 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
262 TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits, \
263 ereg0, ebit0, ereg1, ebit1, goreg, gobit)
264
265static struct tps6586x_regulator tps6586x_regulator[] = {
266 TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0),
267 TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
268 TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
269 TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
270 TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
271 TPS6586X_LDO(LDO_8, ldo, SUPPLYV1, 5, 3, ENC, 6, END, 6),
272 TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
273 TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, ENE, 7, ENE, 7),
274 TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
Gary King4cc2e392010-07-30 22:58:58 +0300275 TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 1, END, 1),
Mike Rapoport49610232010-07-27 14:03:01 +0300276
277 TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6),
278 TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6),
279 TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2),
280 TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0),
281};
282
283/*
284 * TPS6586X has 2 enable bits that are OR'ed to determine the actual
285 * regulator state. Clearing one of this bits allows switching
286 * regulator on and of with single register write.
287 */
288static inline int tps6586x_regulator_preinit(struct device *parent,
289 struct tps6586x_regulator *ri)
290{
291 uint8_t val1, val2;
292 int ret;
293
294 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
295 if (ret)
296 return ret;
297
298 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
299 if (ret)
300 return ret;
301
302 if (!(val2 & ri->enable_bit[1]))
303 return 0;
304
305 /*
306 * The regulator is on, but it's enabled with the bit we don't
307 * want to use, so we switch the enable bits
308 */
309 if (!(val1 & ri->enable_bit[0])) {
310 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
311 1 << ri->enable_bit[0]);
312 if (ret)
313 return ret;
314 }
315
316 return tps6586x_clr_bits(parent, ri->enable_reg[1],
317 1 << ri->enable_bit[1]);
318}
319
320static inline struct tps6586x_regulator *find_regulator_info(int id)
321{
322 struct tps6586x_regulator *ri;
323 int i;
324
325 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
326 ri = &tps6586x_regulator[i];
327 if (ri->desc.id == id)
328 return ri;
329 }
330 return NULL;
331}
332
333static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
334{
335 struct tps6586x_regulator *ri = NULL;
336 struct regulator_dev *rdev;
337 int id = pdev->id;
338 int err;
339
340 dev_dbg(&pdev->dev, "Probing reulator %d\n", id);
341
342 ri = find_regulator_info(id);
343 if (ri == NULL) {
344 dev_err(&pdev->dev, "invalid regulator ID specified\n");
345 return -EINVAL;
346 }
347
348 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
349 if (err)
350 return err;
351
352 rdev = regulator_register(&ri->desc, &pdev->dev,
353 pdev->dev.platform_data, ri);
354 if (IS_ERR(rdev)) {
355 dev_err(&pdev->dev, "failed to register regulator %s\n",
356 ri->desc.name);
357 return PTR_ERR(rdev);
358 }
359
360 platform_set_drvdata(pdev, ri);
361
362 return 0;
363}
364
365static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
366{
367 return 0;
368}
369
370static struct platform_driver tps6586x_regulator_driver = {
371 .driver = {
372 .name = "tps6586x-regulator",
373 .owner = THIS_MODULE,
374 },
375 .probe = tps6586x_regulator_probe,
376 .remove = __devexit_p(tps6586x_regulator_remove),
377};
378
379static int __init tps6586x_regulator_init(void)
380{
381 return platform_driver_register(&tps6586x_regulator_driver);
382}
383subsys_initcall(tps6586x_regulator_init);
384
385static void __exit tps6586x_regulator_exit(void)
386{
387 platform_driver_unregister(&tps6586x_regulator_driver);
388}
389module_exit(tps6586x_regulator_exit);
390
391MODULE_LICENSE("GPL");
392MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
393MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
394MODULE_ALIAS("platform:tps6586x-regulator");