4 * Supports TPS65023 Regulator
6 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation version 2.
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
13 * whether express or implied; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/err.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/machine.h>
25 #include <linux/i2c.h>
26 #include <linux/slab.h>
27 #include <linux/regmap.h>
29 /* Register definitions */
30 #define TPS65023_REG_VERSION 0
31 #define TPS65023_REG_PGOODZ 1
32 #define TPS65023_REG_MASK 2
33 #define TPS65023_REG_REG_CTRL 3
34 #define TPS65023_REG_CON_CTRL 4
35 #define TPS65023_REG_CON_CTRL2 5
36 #define TPS65023_REG_DEF_CORE 6
37 #define TPS65023_REG_DEFSLEW 7
38 #define TPS65023_REG_LDO_CTRL 8
40 /* PGOODZ bitfields */
41 #define TPS65023_PGOODZ_PWRFAILZ BIT(7)
42 #define TPS65023_PGOODZ_LOWBATTZ BIT(6)
43 #define TPS65023_PGOODZ_VDCDC1 BIT(5)
44 #define TPS65023_PGOODZ_VDCDC2 BIT(4)
45 #define TPS65023_PGOODZ_VDCDC3 BIT(3)
46 #define TPS65023_PGOODZ_LDO2 BIT(2)
47 #define TPS65023_PGOODZ_LDO1 BIT(1)
50 #define TPS65023_MASK_PWRFAILZ BIT(7)
51 #define TPS65023_MASK_LOWBATTZ BIT(6)
52 #define TPS65023_MASK_VDCDC1 BIT(5)
53 #define TPS65023_MASK_VDCDC2 BIT(4)
54 #define TPS65023_MASK_VDCDC3 BIT(3)
55 #define TPS65023_MASK_LDO2 BIT(2)
56 #define TPS65023_MASK_LDO1 BIT(1)
58 /* REG_CTRL bitfields */
59 #define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
60 #define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
61 #define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
62 #define TPS65023_REG_CTRL_LDO2_EN BIT(2)
63 #define TPS65023_REG_CTRL_LDO1_EN BIT(1)
65 /* REG_CTRL2 bitfields */
66 #define TPS65023_REG_CTRL2_GO BIT(7)
67 #define TPS65023_REG_CTRL2_CORE_ADJ BIT(6)
68 #define TPS65023_REG_CTRL2_DCDC2 BIT(2)
69 #define TPS65023_REG_CTRL2_DCDC1 BIT(1)
70 #define TPS65023_REG_CTRL2_DCDC3 BIT(0)
72 /* LDO_CTRL bitfields */
73 #define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id) ((ldo_id)*4)
74 #define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id) (0x0F << ((ldo_id)*4))
76 /* Number of step-down converters available */
77 #define TPS65023_NUM_DCDC 3
78 /* Number of LDO voltage regulators available */
79 #define TPS65023_NUM_LDO 2
80 /* Number of total regulators available */
81 #define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
84 #define TPS65023_DCDC_1 0
85 #define TPS65023_DCDC_2 1
86 #define TPS65023_DCDC_3 2
88 #define TPS65023_LDO_1 3
89 #define TPS65023_LDO_2 4
91 #define TPS65023_MAX_REG_ID TPS65023_LDO_2
93 /* Supported voltage values for regulators */
94 static const u16 VCORE_VSEL_table[] = {
97 1000, 1025, 1050, 1075,
98 1100, 1125, 1150, 1175,
99 1200, 1225, 1250, 1275,
100 1300, 1325, 1350, 1375,
101 1400, 1425, 1450, 1475,
102 1500, 1525, 1550, 1600,
105 /* Supported voltage values for LDO regulators for tps65020 */
106 static const u16 TPS65020_LDO1_VSEL_table[] = {
107 1000, 1050, 1100, 1300,
108 1800, 2500, 3000, 3300,
111 static const u16 TPS65020_LDO2_VSEL_table[] = {
112 1000, 1050, 1100, 1300,
113 1800, 2500, 3000, 3300,
116 /* Supported voltage values for LDO regulators
117 * for tps65021 and tps65023 */
118 static const u16 TPS65023_LDO1_VSEL_table[] = {
119 1000, 1100, 1300, 1800,
120 2200, 2600, 2800, 3150,
123 static const u16 TPS65023_LDO2_VSEL_table[] = {
124 1050, 1200, 1300, 1800,
125 2500, 2800, 3000, 3300,
128 /* Regulator specific details */
140 struct regulator_desc desc[TPS65023_NUM_REGULATOR];
141 struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
142 const struct tps_info *info[TPS65023_NUM_REGULATOR];
143 struct regmap *regmap;
147 /* Struct passed as driver data */
148 struct tps_driver_data {
149 const struct tps_info *info;
153 static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
155 struct tps_pmic *tps = rdev_get_drvdata(dev);
157 int data, dcdc = rdev_get_id(dev);
159 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
162 if (dcdc == tps->core_regulator) {
163 ret = regmap_read(tps->regmap, TPS65023_REG_DEF_CORE, &data);
166 data &= (tps->info[dcdc]->table_len - 1);
167 return tps->info[dcdc]->table[data] * 1000;
169 return tps->info[dcdc]->min_uV;
172 static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
175 struct tps_pmic *tps = rdev_get_drvdata(dev);
176 int dcdc = rdev_get_id(dev);
179 if (dcdc != tps->core_regulator)
182 ret = regmap_write(tps->regmap, TPS65023_REG_DEF_CORE, selector);
186 /* Tell the chip that we have changed the value in DEFCORE
187 * and its time to update the core voltage
189 ret = regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
190 TPS65023_REG_CTRL2_GO, TPS65023_REG_CTRL2_GO);
196 static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
198 struct tps_pmic *tps = rdev_get_drvdata(dev);
199 int data, ldo = rdev_get_id(dev);
202 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
205 ret = regmap_read(tps->regmap, TPS65023_REG_LDO_CTRL, &data);
209 data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
210 data &= (tps->info[ldo]->table_len - 1);
211 return tps->info[ldo]->table[data] * 1000;
214 static int tps65023_ldo_set_voltage_sel(struct regulator_dev *dev,
217 struct tps_pmic *tps = rdev_get_drvdata(dev);
218 int ldo_index = rdev_get_id(dev) - TPS65023_LDO_1;
220 return regmap_update_bits(tps->regmap, TPS65023_REG_LDO_CTRL,
221 TPS65023_LDO_CTRL_LDOx_MASK(ldo_index),
222 selector << TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_index));
225 static int tps65023_dcdc_list_voltage(struct regulator_dev *dev,
228 struct tps_pmic *tps = rdev_get_drvdata(dev);
229 int dcdc = rdev_get_id(dev);
231 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
234 if (dcdc == tps->core_regulator) {
235 if (selector >= tps->info[dcdc]->table_len)
238 return tps->info[dcdc]->table[selector] * 1000;
240 return tps->info[dcdc]->min_uV;
243 static int tps65023_ldo_list_voltage(struct regulator_dev *dev,
246 struct tps_pmic *tps = rdev_get_drvdata(dev);
247 int ldo = rdev_get_id(dev);
249 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
252 if (selector >= tps->info[ldo]->table_len)
255 return tps->info[ldo]->table[selector] * 1000;
258 /* Operations permitted on VDCDCx */
259 static struct regulator_ops tps65023_dcdc_ops = {
260 .is_enabled = regulator_is_enabled_regmap,
261 .enable = regulator_enable_regmap,
262 .disable = regulator_disable_regmap,
263 .get_voltage = tps65023_dcdc_get_voltage,
264 .set_voltage_sel = tps65023_dcdc_set_voltage_sel,
265 .list_voltage = tps65023_dcdc_list_voltage,
268 /* Operations permitted on LDOx */
269 static struct regulator_ops tps65023_ldo_ops = {
270 .is_enabled = regulator_is_enabled_regmap,
271 .enable = regulator_enable_regmap,
272 .disable = regulator_disable_regmap,
273 .get_voltage = tps65023_ldo_get_voltage,
274 .set_voltage_sel = tps65023_ldo_set_voltage_sel,
275 .list_voltage = tps65023_ldo_list_voltage,
278 static struct regmap_config tps65023_regmap_config = {
283 static int __devinit tps_65023_probe(struct i2c_client *client,
284 const struct i2c_device_id *id)
286 const struct tps_driver_data *drv_data = (void *)id->driver_data;
287 const struct tps_info *info = drv_data->info;
288 struct regulator_config config = { };
289 struct regulator_init_data *init_data;
290 struct regulator_dev *rdev;
291 struct tps_pmic *tps;
295 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
299 * init_data points to array of regulator_init structures
300 * coming from the board-evm file.
302 init_data = client->dev.platform_data;
306 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
310 tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
311 if (IS_ERR(tps->regmap)) {
312 error = PTR_ERR(tps->regmap);
313 dev_err(&client->dev, "Failed to allocate register map: %d\n",
318 /* common for all regulators */
319 tps->core_regulator = drv_data->core_regulator;
321 for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
322 /* Store regulator specific information */
325 tps->desc[i].name = info->name;
327 tps->desc[i].n_voltages = info->table_len;
328 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
329 &tps65023_ldo_ops : &tps65023_dcdc_ops);
330 tps->desc[i].type = REGULATOR_VOLTAGE;
331 tps->desc[i].owner = THIS_MODULE;
333 tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
334 if (i == TPS65023_LDO_1)
335 tps->desc[i].enable_mask = 1 << 1;
336 else if (i == TPS65023_LDO_2)
337 tps->desc[i].enable_mask = 1 << 2;
339 tps->desc[i].enable_mask =
340 1 << (TPS65023_NUM_REGULATOR - i);
342 config.dev = &client->dev;
343 config.init_data = init_data;
344 config.driver_data = tps;
345 config.regmap = tps->regmap;
347 /* Register the regulators */
348 rdev = regulator_register(&tps->desc[i], &config);
350 dev_err(&client->dev, "failed to register %s\n",
352 error = PTR_ERR(rdev);
356 /* Save regulator for cleanup */
360 i2c_set_clientdata(client, tps);
362 /* Enable setting output voltage by I2C */
363 regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
364 TPS65023_REG_CTRL2_CORE_ADJ, TPS65023_REG_CTRL2_CORE_ADJ);
370 regulator_unregister(tps->rdev[i]);
374 static int __devexit tps_65023_remove(struct i2c_client *client)
376 struct tps_pmic *tps = i2c_get_clientdata(client);
379 for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
380 regulator_unregister(tps->rdev[i]);
384 static const struct tps_info tps65020_regs[] = {
401 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
402 .table = VCORE_VSEL_table,
409 .table_len = ARRAY_SIZE(TPS65020_LDO1_VSEL_table),
410 .table = TPS65020_LDO1_VSEL_table,
416 .table_len = ARRAY_SIZE(TPS65020_LDO2_VSEL_table),
417 .table = TPS65020_LDO2_VSEL_table,
421 static const struct tps_info tps65021_regs[] = {
438 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
439 .table = VCORE_VSEL_table,
445 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
446 .table = TPS65023_LDO1_VSEL_table,
452 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
453 .table = TPS65023_LDO2_VSEL_table,
457 static const struct tps_info tps65023_regs[] = {
462 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
463 .table = VCORE_VSEL_table,
481 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
482 .table = TPS65023_LDO1_VSEL_table,
488 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
489 .table = TPS65023_LDO2_VSEL_table,
493 static struct tps_driver_data tps65020_drv_data = {
494 .info = tps65020_regs,
495 .core_regulator = TPS65023_DCDC_3,
498 static struct tps_driver_data tps65021_drv_data = {
499 .info = tps65021_regs,
500 .core_regulator = TPS65023_DCDC_3,
503 static struct tps_driver_data tps65023_drv_data = {
504 .info = tps65023_regs,
505 .core_regulator = TPS65023_DCDC_1,
508 static const struct i2c_device_id tps_65023_id[] = {
510 .driver_data = (unsigned long) &tps65023_drv_data},
512 .driver_data = (unsigned long) &tps65021_drv_data,},
514 .driver_data = (unsigned long) &tps65020_drv_data},
518 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
520 static struct i2c_driver tps_65023_i2c_driver = {
523 .owner = THIS_MODULE,
525 .probe = tps_65023_probe,
526 .remove = __devexit_p(tps_65023_remove),
527 .id_table = tps_65023_id,
530 static int __init tps_65023_init(void)
532 return i2c_add_driver(&tps_65023_i2c_driver);
534 subsys_initcall(tps_65023_init);
536 static void __exit tps_65023_cleanup(void)
538 i2c_del_driver(&tps_65023_i2c_driver);
540 module_exit(tps_65023_cleanup);
542 MODULE_AUTHOR("Texas Instruments");
543 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
544 MODULE_LICENSE("GPL v2");