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;
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_list_voltage(struct regulator_dev *rdev, unsigned selector)
80 struct tps6586x_regulator *info = rdev_get_drvdata(rdev);
81 int rid = rdev_get_id(rdev);
83 /* LDO0 has minimal voltage 1.2V rather than 1.25V */
84 if ((rid == TPS6586X_ID_LDO_0) && (selector == 0))
85 return (info->voltages[0] - 50) * 1000;
87 return info->voltages[selector] * 1000;
91 static int tps6586x_set_voltage_sel(struct regulator_dev *rdev,
94 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
95 struct device *parent = to_tps6586x_dev(rdev);
96 int ret, val, rid = rdev_get_id(rdev);
99 val = selector << ri->volt_shift;
100 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
102 ret = tps6586x_update(parent, ri->volt_reg, val, mask);
106 /* Update go bit for DVM regulators */
108 case TPS6586X_ID_LDO_2:
109 case TPS6586X_ID_LDO_4:
110 case TPS6586X_ID_SM_0:
111 case TPS6586X_ID_SM_1:
112 ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
118 static int tps6586x_get_voltage_sel(struct regulator_dev *rdev)
120 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
121 struct device *parent = to_tps6586x_dev(rdev);
125 ret = tps6586x_read(parent, ri->volt_reg, &val);
129 mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
130 val = (val & mask) >> ri->volt_shift;
132 if (val >= ri->desc.n_voltages)
138 static int tps6586x_regulator_enable(struct regulator_dev *rdev)
140 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
141 struct device *parent = to_tps6586x_dev(rdev);
143 return tps6586x_set_bits(parent, ri->enable_reg[0],
144 1 << ri->enable_bit[0]);
147 static int tps6586x_regulator_disable(struct regulator_dev *rdev)
149 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
150 struct device *parent = to_tps6586x_dev(rdev);
152 return tps6586x_clr_bits(parent, ri->enable_reg[0],
153 1 << ri->enable_bit[0]);
156 static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
158 struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
159 struct device *parent = to_tps6586x_dev(rdev);
163 ret = tps6586x_read(parent, ri->enable_reg[0], ®_val);
167 return !!(reg_val & (1 << ri->enable_bit[0]));
170 static struct regulator_ops tps6586x_regulator_ops = {
171 .list_voltage = tps6586x_list_voltage,
172 .get_voltage_sel = tps6586x_get_voltage_sel,
173 .set_voltage_sel = tps6586x_set_voltage_sel,
175 .is_enabled = tps6586x_regulator_is_enabled,
176 .enable = tps6586x_regulator_enable,
177 .disable = tps6586x_regulator_disable,
180 static int tps6586x_ldo_voltages[] = {
181 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300,
184 static int tps6586x_ldo4_voltages[] = {
185 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
186 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075,
187 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275,
188 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475,
191 static int tps6586x_sm2_voltages[] = {
192 3000, 3050, 3100, 3150, 3200, 3250, 3300, 3350,
193 3400, 3450, 3500, 3550, 3600, 3650, 3700, 3750,
194 3800, 3850, 3900, 3950, 4000, 4050, 4100, 4150,
195 4200, 4250, 4300, 4350, 4400, 4450, 4500, 4550,
198 static int tps6586x_dvm_voltages[] = {
199 725, 750, 775, 800, 825, 850, 875, 900,
200 925, 950, 975, 1000, 1025, 1050, 1075, 1100,
201 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
202 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
205 #define TPS6586X_REGULATOR(_id, vdata, vreg, shift, nbits, \
206 ereg0, ebit0, ereg1, ebit1) \
208 .name = "REG-" #_id, \
209 .ops = &tps6586x_regulator_ops, \
210 .type = REGULATOR_VOLTAGE, \
211 .id = TPS6586X_ID_##_id, \
212 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
213 .owner = THIS_MODULE, \
215 .volt_reg = TPS6586X_##vreg, \
216 .volt_shift = (shift), \
217 .volt_nbits = (nbits), \
218 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
219 .enable_bit[0] = (ebit0), \
220 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
221 .enable_bit[1] = (ebit1), \
222 .voltages = tps6586x_##vdata##_voltages,
224 #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
225 .go_reg = TPS6586X_##goreg, \
228 #define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \
229 ereg0, ebit0, ereg1, ebit1) \
231 TPS6586X_REGULATOR(_id, vdata, vreg, shift, nbits, \
232 ereg0, ebit0, ereg1, ebit1) \
235 #define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \
236 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
238 TPS6586X_REGULATOR(_id, vdata, vreg, shift, nbits, \
239 ereg0, ebit0, ereg1, ebit1) \
240 TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
243 static struct tps6586x_regulator tps6586x_regulator[] = {
244 TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0),
245 TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
246 TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
247 TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
248 TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
249 TPS6586X_LDO(LDO_8, ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
250 TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
251 TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
252 TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
253 TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
255 TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6),
256 TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6),
257 TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2),
258 TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0),
262 * TPS6586X has 2 enable bits that are OR'ed to determine the actual
263 * regulator state. Clearing one of this bits allows switching
264 * regulator on and of with single register write.
266 static inline int tps6586x_regulator_preinit(struct device *parent,
267 struct tps6586x_regulator *ri)
272 if (ri->enable_reg[0] == ri->enable_reg[1] &&
273 ri->enable_bit[0] == ri->enable_bit[1])
276 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
280 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
284 if (!(val2 & (1 << ri->enable_bit[1])))
288 * The regulator is on, but it's enabled with the bit we don't
289 * want to use, so we switch the enable bits
291 if (!(val1 & (1 << ri->enable_bit[0]))) {
292 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
293 1 << ri->enable_bit[0]);
298 return tps6586x_clr_bits(parent, ri->enable_reg[1],
299 1 << ri->enable_bit[1]);
302 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
304 struct device *parent = pdev->dev.parent;
305 struct regulator_init_data *p = pdev->dev.platform_data;
306 struct tps6586x_settings *setting = p->driver_data;
312 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
315 /* only SM0 and SM1 can have the slew rate settings */
317 case TPS6586X_ID_SM_0:
318 reg = TPS6586X_SM0SL;
320 case TPS6586X_ID_SM_1:
321 reg = TPS6586X_SM1SL;
324 dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
328 return tps6586x_write(parent, reg,
329 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
332 static inline struct tps6586x_regulator *find_regulator_info(int id)
334 struct tps6586x_regulator *ri;
337 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
338 ri = &tps6586x_regulator[i];
339 if (ri->desc.id == id)
345 static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
347 struct tps6586x_regulator *ri = NULL;
348 struct regulator_config config = { };
349 struct regulator_dev *rdev;
353 dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
355 ri = find_regulator_info(id);
357 dev_err(&pdev->dev, "invalid regulator ID specified\n");
361 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
365 config.dev = &pdev->dev;
366 config.of_node = pdev->dev.of_node;
367 config.init_data = pdev->dev.platform_data;
368 config.driver_data = ri;
370 rdev = regulator_register(&ri->desc, &config);
372 dev_err(&pdev->dev, "failed to register regulator %s\n",
374 return PTR_ERR(rdev);
377 platform_set_drvdata(pdev, rdev);
379 return tps6586x_regulator_set_slew_rate(pdev);
382 static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
384 struct regulator_dev *rdev = platform_get_drvdata(pdev);
386 regulator_unregister(rdev);
390 static struct platform_driver tps6586x_regulator_driver = {
392 .name = "tps6586x-regulator",
393 .owner = THIS_MODULE,
395 .probe = tps6586x_regulator_probe,
396 .remove = __devexit_p(tps6586x_regulator_remove),
399 static int __init tps6586x_regulator_init(void)
401 return platform_driver_register(&tps6586x_regulator_driver);
403 subsys_initcall(tps6586x_regulator_init);
405 static void __exit tps6586x_regulator_exit(void)
407 platform_driver_unregister(&tps6586x_regulator_driver);
409 module_exit(tps6586x_regulator_exit);
411 MODULE_LICENSE("GPL");
412 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
413 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
414 MODULE_ALIAS("platform:tps6586x-regulator");