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;
63 /* for DVM regulators */
68 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
70 return rdev_get_dev(rdev)->parent;
73 static int tps6586x_set_voltage_sel(struct regulator_dev *rdev,
76 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
77 struct device *parent = to_tps6586x_dev(rdev);
78 int ret, val, rid = rdev_get_id(rdev);
81 val = selector << (ffs(rdev->desc->vsel_mask) - 1);
82 mask = rdev->desc->vsel_mask;
84 ret = tps6586x_update(parent, rdev->desc->vsel_reg, val, mask);
88 /* Update go bit for DVM regulators */
90 case TPS6586X_ID_LDO_2:
91 case TPS6586X_ID_LDO_4:
92 case TPS6586X_ID_SM_0:
93 case TPS6586X_ID_SM_1:
94 ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
100 static struct regulator_ops tps6586x_regulator_ops = {
101 .list_voltage = regulator_list_voltage_table,
102 .get_voltage_sel = regulator_get_voltage_sel_regmap,
103 .set_voltage_sel = tps6586x_set_voltage_sel,
105 .is_enabled = regulator_is_enabled_regmap,
106 .enable = regulator_enable_regmap,
107 .disable = regulator_disable_regmap,
110 static struct regulator_ops tps6586x_sys_regulator_ops = {
113 static const unsigned int tps6586x_ldo0_voltages[] = {
114 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
117 static const unsigned int tps6586x_ldo4_voltages[] = {
118 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000,
119 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000,
120 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000,
121 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000,
124 static const unsigned int tps6586x_ldo_voltages[] = {
125 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
128 static const unsigned int tps6586x_sm2_voltages[] = {
129 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
130 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
131 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
132 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
135 static const unsigned int tps6586x_dvm_voltages[] = {
136 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
137 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
138 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
139 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
142 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
143 ereg0, ebit0, ereg1, ebit1) \
145 .supply_name = _pin_name, \
146 .name = "REG-" #_id, \
147 .ops = &tps6586x_regulator_ops, \
148 .type = REGULATOR_VOLTAGE, \
149 .id = TPS6586X_ID_##_id, \
150 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
151 .volt_table = tps6586x_##vdata##_voltages, \
152 .owner = THIS_MODULE, \
153 .enable_reg = TPS6586X_SUPPLY##ereg0, \
154 .enable_mask = 1 << (ebit0), \
155 .vsel_reg = TPS6586X_##vreg, \
156 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \
158 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
159 .enable_bit[0] = (ebit0), \
160 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
161 .enable_bit[1] = (ebit1),
163 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
164 .go_reg = TPS6586X_##goreg, \
167 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
168 ereg0, ebit0, ereg1, ebit1) \
170 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
171 ereg0, ebit0, ereg1, ebit1) \
174 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
175 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
177 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
178 ereg0, ebit0, ereg1, ebit1) \
179 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
182 #define TPS6586X_SYS_REGULATOR() \
185 .supply_name = "sys", \
187 .ops = &tps6586x_sys_regulator_ops, \
188 .type = REGULATOR_VOLTAGE, \
189 .id = TPS6586X_ID_SYS, \
190 .owner = THIS_MODULE, \
194 static struct tps6586x_regulator tps6586x_regulator[] = {
195 TPS6586X_SYS_REGULATOR(),
196 TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
197 TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
198 TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
199 TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
200 TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
201 TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
202 TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
203 TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
204 TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
205 TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
207 TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
209 TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
211 TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1,
213 TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0,
218 * TPS6586X has 2 enable bits that are OR'ed to determine the actual
219 * regulator state. Clearing one of this bits allows switching
220 * regulator on and of with single register write.
222 static inline int tps6586x_regulator_preinit(struct device *parent,
223 struct tps6586x_regulator *ri)
228 if (ri->enable_reg[0] == ri->enable_reg[1] &&
229 ri->enable_bit[0] == ri->enable_bit[1])
232 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
236 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
240 if (!(val2 & (1 << ri->enable_bit[1])))
244 * The regulator is on, but it's enabled with the bit we don't
245 * want to use, so we switch the enable bits
247 if (!(val1 & (1 << ri->enable_bit[0]))) {
248 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
249 1 << ri->enable_bit[0]);
254 return tps6586x_clr_bits(parent, ri->enable_reg[1],
255 1 << ri->enable_bit[1]);
258 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
260 struct device *parent = pdev->dev.parent;
261 struct regulator_init_data *p = pdev->dev.platform_data;
262 struct tps6586x_settings *setting = p->driver_data;
268 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
271 /* only SM0 and SM1 can have the slew rate settings */
273 case TPS6586X_ID_SM_0:
274 reg = TPS6586X_SM0SL;
276 case TPS6586X_ID_SM_1:
277 reg = TPS6586X_SM1SL;
280 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
284 return tps6586x_write(parent, reg,
285 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
288 static inline struct tps6586x_regulator *find_regulator_info(int id)
290 struct tps6586x_regulator *ri;
293 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
294 ri = &tps6586x_regulator[i];
295 if (ri->desc.id == id)
301 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
303 struct tps6586x_regulator *ri = NULL;
304 struct regulator_config config = { };
305 struct regulator_dev *rdev;
309 dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
311 ri = find_regulator_info(id);
313 dev_err(&pdev->dev, "invalid regulator ID specified\n");
317 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
321 config.dev = pdev->dev.parent;
322 config.of_node = pdev->dev.of_node;
323 config.init_data = pdev->dev.platform_data;
324 config.driver_data = ri;
326 rdev = regulator_register(&ri->desc, &config);
328 dev_err(&pdev->dev, "failed to register regulator %s\n",
330 return PTR_ERR(rdev);
333 platform_set_drvdata(pdev, rdev);
335 return tps6586x_regulator_set_slew_rate(pdev);
338 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
340 struct regulator_dev *rdev = platform_get_drvdata(pdev);
342 regulator_unregister(rdev);
346 static struct platform_driver tps6586x_regulator_driver = {
348 .name = "tps6586x-regulator",
349 .owner = THIS_MODULE,
351 .probe = tps6586x_regulator_probe,
352 .remove = __devexit_p(tps6586x_regulator_remove),
355 static int __init tps6586x_regulator_init(void)
357 return platform_driver_register(&tps6586x_regulator_driver);
359 subsys_initcall(tps6586x_regulator_init);
361 static void __exit tps6586x_regulator_exit(void)
363 platform_driver_unregister(&tps6586x_regulator_driver);
365 module_exit(tps6586x_regulator_exit);
367 MODULE_LICENSE("GPL");
368 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
369 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
370 MODULE_ALIAS("platform:tps6586x-regulator");