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.
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>
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;
66 /* for DVM regulators */
71 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
73 return rdev_get_dev(rdev)->parent;
76 static int tps6586x_set_voltage_sel(struct regulator_dev *rdev,
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);
84 val = selector << ri->volt_shift;
85 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
87 ret = tps6586x_update(parent, ri->volt_reg, val, mask);
91 /* Update go bit for DVM regulators */
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);
103 static int tps6586x_get_voltage_sel(struct regulator_dev *rdev)
105 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
106 struct device *parent = to_tps6586x_dev(rdev);
110 ret = tps6586x_read(parent, ri->volt_reg, &val);
114 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
115 val = (val & mask) >> ri->volt_shift;
117 if (val >= ri->desc.n_voltages)
123 static int tps6586x_regulator_enable(struct regulator_dev *rdev)
125 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
126 struct device *parent = to_tps6586x_dev(rdev);
128 return tps6586x_set_bits(parent, ri->enable_reg[0],
129 1 << ri->enable_bit[0]);
132 static int tps6586x_regulator_disable(struct regulator_dev *rdev)
134 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
135 struct device *parent = to_tps6586x_dev(rdev);
137 return tps6586x_clr_bits(parent, ri->enable_reg[0],
138 1 << ri->enable_bit[0]);
141 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
143 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
144 struct device *parent = to_tps6586x_dev(rdev);
148 ret = tps6586x_read(parent, ri->enable_reg[0], ®_val);
152 return !!(reg_val & (1 << ri->enable_bit[0]));
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,
160 .is_enabled = tps6586x_regulator_is_enabled,
161 .enable = tps6586x_regulator_enable,
162 .disable = tps6586x_regulator_disable,
165 static const unsigned int tps6586x_ldo0_voltages[] = {
166 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
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,
176 static const unsigned int tps6586x_ldo_voltages[] = {
177 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
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,
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,
194 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
195 ereg0, ebit0, ereg1, ebit1) \
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, \
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),
214 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
215 .go_reg = TPS6586X_##goreg, \
218 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
219 ereg0, ebit0, ereg1, ebit1) \
221 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
222 ereg0, ebit0, ereg1, ebit1) \
225 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
226 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
228 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
229 ereg0, ebit0, ereg1, ebit1) \
230 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
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),
245 TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
247 TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
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),
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.
258 static inline int tps6586x_regulator_preinit(struct device *parent,
259 struct tps6586x_regulator *ri)
264 if (ri->enable_reg[0] == ri->enable_reg[1] &&
265 ri->enable_bit[0] == ri->enable_bit[1])
268 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
272 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
276 if (!(val2 & (1 << ri->enable_bit[1])))
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
283 if (!(val1 & (1 << ri->enable_bit[0]))) {
284 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
285 1 << ri->enable_bit[0]);
290 return tps6586x_clr_bits(parent, ri->enable_reg[1],
291 1 << ri->enable_bit[1]);
294 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
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;
304 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
307 /* only SM0 and SM1 can have the slew rate settings */
309 case TPS6586X_ID_SM_0:
310 reg = TPS6586X_SM0SL;
312 case TPS6586X_ID_SM_1:
313 reg = TPS6586X_SM1SL;
316 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
320 return tps6586x_write(parent, reg,
321 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
324 static inline struct tps6586x_regulator *find_regulator_info(int id)
326 struct tps6586x_regulator *ri;
329 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
330 ri = &tps6586x_regulator[i];
331 if (ri->desc.id == id)
337 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
339 struct tps6586x_regulator *ri = NULL;
340 struct regulator_config config = { };
341 struct regulator_dev *rdev;
345 dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
347 ri = find_regulator_info(id);
349 dev_err(&pdev->dev, "invalid regulator ID specified\n");
353 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
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;
362 rdev = regulator_register(&ri->desc, &config);
364 dev_err(&pdev->dev, "failed to register regulator %s\n",
366 return PTR_ERR(rdev);
369 platform_set_drvdata(pdev, rdev);
371 return tps6586x_regulator_set_slew_rate(pdev);
374 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
376 struct regulator_dev *rdev = platform_get_drvdata(pdev);
378 regulator_unregister(rdev);
382 static struct platform_driver tps6586x_regulator_driver = {
384 .name = "tps6586x-regulator",
385 .owner = THIS_MODULE,
387 .probe = tps6586x_regulator_probe,
388 .remove = __devexit_p(tps6586x_regulator_remove),
391 static int __init tps6586x_regulator_init(void)
393 return platform_driver_register(&tps6586x_regulator_driver);
395 subsys_initcall(tps6586x_regulator_init);
397 static void __exit tps6586x_regulator_exit(void)
399 platform_driver_unregister(&tps6586x_regulator_driver);
401 module_exit(tps6586x_regulator_exit);
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");