2 * Regulator driver for TI TPS6586x
4 * Copyright (C) 2010 Compulab Ltd.
5 * Author: Mike Rapoport <mike@compulab.co.il>
8 * Copyright (C) 2006-2008 Marvell International Ltd.
9 * Copyright (C) 2008 Compulab Ltd.
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.
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>
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
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
57 struct tps6586x_regulator {
58 struct regulator_desc desc;
68 /* for DVM regulators */
73 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
75 return rdev_get_dev(rdev)->parent->parent;
78 static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev,
81 struct tps6586x_regulator *info = rdev_get_drvdata(rdev);
83 return info->voltages[selector] * 1000;
87 static int __tps6586x_ldo_set_voltage(struct device *parent,
88 struct tps6586x_regulator *ri,
89 int min_uV, int max_uV)
94 for (val = 0; val < ri->desc.n_voltages; val++) {
95 uV = ri->voltages[val] * 1000;
97 /* LDO0 has minimal voltage 1.2 rather than 1.25 */
98 if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0)
101 /* use the first in-range value */
102 if (min_uV <= uV && uV <= max_uV) {
104 val <<= ri->volt_shift;
105 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
107 return tps6586x_update(parent, ri->volt_reg, val, mask);
114 static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev,
115 int min_uV, int max_uV)
117 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
118 struct device *parent = to_tps6586x_dev(rdev);
120 return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV);
123 static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev)
125 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
126 struct device *parent = to_tps6586x_dev(rdev);
130 ret = tps6586x_read(parent, ri->volt_reg, &val);
134 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
135 val = (val & mask) >> ri->volt_shift;
137 if (val > ri->desc.n_voltages)
140 return ri->voltages[val] * 1000;
143 static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev,
144 int min_uV, int max_uV)
146 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
147 struct device *parent = to_tps6586x_dev(rdev);
150 ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV);
154 return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit);
157 static int tps6586x_regulator_enable(struct regulator_dev *rdev)
159 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
160 struct device *parent = to_tps6586x_dev(rdev);
162 return tps6586x_set_bits(parent, ri->enable_reg[0],
163 1 << ri->enable_bit[0]);
166 static int tps6586x_regulator_disable(struct regulator_dev *rdev)
168 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
169 struct device *parent = to_tps6586x_dev(rdev);
171 return tps6586x_clr_bits(parent, ri->enable_reg[0],
172 1 << ri->enable_bit[0]);
175 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
177 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
178 struct device *parent = to_tps6586x_dev(rdev);
182 ret = tps6586x_read(parent, ri->enable_reg[0], ®_val);
186 return !!(reg_val & (1 << ri->enable_bit[0]));
189 static 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,
194 .is_enabled = tps6586x_regulator_is_enabled,
195 .enable = tps6586x_regulator_enable,
196 .disable = tps6586x_regulator_disable,
199 static 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,
204 .is_enabled = tps6586x_regulator_is_enabled,
205 .enable = tps6586x_regulator_enable,
206 .disable = tps6586x_regulator_disable,
209 static int tps6586x_ldo_voltages[] = {
210 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300,
213 static 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,
220 static 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,
227 static 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,
234 #define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \
235 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
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, \
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, \
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)
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)
265 static 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),
275 TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 1, END, 1),
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),
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.
288 static inline int tps6586x_regulator_preinit(struct device *parent,
289 struct tps6586x_regulator *ri)
294 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
298 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
302 if (!(val2 & ri->enable_bit[1]))
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
309 if (!(val1 & ri->enable_bit[0])) {
310 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
311 1 << ri->enable_bit[0]);
316 return tps6586x_clr_bits(parent, ri->enable_reg[1],
317 1 << ri->enable_bit[1]);
320 static inline struct tps6586x_regulator *find_regulator_info(int id)
322 struct tps6586x_regulator *ri;
325 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
326 ri = &tps6586x_regulator[i];
327 if (ri->desc.id == id)
333 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
335 struct tps6586x_regulator *ri = NULL;
336 struct regulator_dev *rdev;
340 dev_dbg(&pdev->dev, "Probing reulator %d\n", id);
342 ri = find_regulator_info(id);
344 dev_err(&pdev->dev, "invalid regulator ID specified\n");
348 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
352 rdev = regulator_register(&ri->desc, &pdev->dev,
353 pdev->dev.platform_data, ri);
355 dev_err(&pdev->dev, "failed to register regulator %s\n",
357 return PTR_ERR(rdev);
360 platform_set_drvdata(pdev, rdev);
365 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
367 struct regulator_dev *rdev = platform_get_drvdata(pdev);
369 regulator_unregister(rdev);
373 static struct platform_driver tps6586x_regulator_driver = {
375 .name = "tps6586x-regulator",
376 .owner = THIS_MODULE,
378 .probe = tps6586x_regulator_probe,
379 .remove = __devexit_p(tps6586x_regulator_remove),
382 static int __init tps6586x_regulator_init(void)
384 return platform_driver_register(&tps6586x_regulator_driver);
386 subsys_initcall(tps6586x_regulator_init);
388 static void __exit tps6586x_regulator_exit(void)
390 platform_driver_unregister(&tps6586x_regulator_driver);
392 module_exit(tps6586x_regulator_exit);
394 MODULE_LICENSE("GPL");
395 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
396 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
397 MODULE_ALIAS("platform:tps6586x-regulator");