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 /* Number of step-down converters available */
73 #define TPS65023_NUM_DCDC 3
74 /* Number of LDO voltage regulators available */
75 #define TPS65023_NUM_LDO 2
76 /* Number of total regulators available */
77 #define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
80 #define TPS65023_DCDC_1 0
81 #define TPS65023_DCDC_2 1
82 #define TPS65023_DCDC_3 2
84 #define TPS65023_LDO_1 3
85 #define TPS65023_LDO_2 4
87 #define TPS65023_MAX_REG_ID TPS65023_LDO_2
89 /* Supported voltage values for regulators */
90 static const unsigned int VCORE_VSEL_table[] = {
91 800000, 825000, 850000, 875000,
92 900000, 925000, 950000, 975000,
93 1000000, 1025000, 1050000, 1075000,
94 1100000, 1125000, 1150000, 1175000,
95 1200000, 1225000, 1250000, 1275000,
96 1300000, 1325000, 1350000, 1375000,
97 1400000, 1425000, 1450000, 1475000,
98 1500000, 1525000, 1550000, 1600000,
101 static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
105 static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
109 /* Supported voltage values for LDO regulators for tps65020 */
110 static const unsigned int TPS65020_LDO1_VSEL_table[] = {
111 1000000, 1050000, 1100000, 1300000,
112 1800000, 2500000, 3000000, 3300000,
115 static const unsigned int TPS65020_LDO2_VSEL_table[] = {
116 1000000, 1050000, 1100000, 1300000,
117 1800000, 2500000, 3000000, 3300000,
120 /* Supported voltage values for LDO regulators
121 * for tps65021 and tps65023 */
122 static const unsigned int TPS65023_LDO1_VSEL_table[] = {
123 1000000, 1100000, 1300000, 1800000,
124 2200000, 2600000, 2800000, 3150000,
127 static const unsigned int TPS65023_LDO2_VSEL_table[] = {
128 1050000, 1200000, 1300000, 1800000,
129 2500000, 2800000, 3000000, 3300000,
132 /* Regulator specific details */
136 const unsigned int *table;
141 struct regulator_desc desc[TPS65023_NUM_REGULATOR];
142 struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
143 const struct tps_info *info[TPS65023_NUM_REGULATOR];
144 struct regmap *regmap;
148 /* Struct passed as driver data */
149 struct tps_driver_data {
150 const struct tps_info *info;
154 static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
156 struct tps_pmic *tps = rdev_get_drvdata(dev);
158 int data, dcdc = rdev_get_id(dev);
160 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
163 if (dcdc == tps->core_regulator) {
164 ret = regmap_read(tps->regmap, TPS65023_REG_DEF_CORE, &data);
167 data &= (tps->info[dcdc]->table_len - 1);
173 static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
176 struct tps_pmic *tps = rdev_get_drvdata(dev);
177 int dcdc = rdev_get_id(dev);
180 if (dcdc != tps->core_regulator)
183 ret = regmap_write(tps->regmap, TPS65023_REG_DEF_CORE, selector);
187 /* Tell the chip that we have changed the value in DEFCORE
188 * and its time to update the core voltage
190 ret = regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
191 TPS65023_REG_CTRL2_GO, TPS65023_REG_CTRL2_GO);
197 /* Operations permitted on VDCDCx */
198 static struct regulator_ops tps65023_dcdc_ops = {
199 .is_enabled = regulator_is_enabled_regmap,
200 .enable = regulator_enable_regmap,
201 .disable = regulator_disable_regmap,
202 .get_voltage_sel = tps65023_dcdc_get_voltage_sel,
203 .set_voltage_sel = tps65023_dcdc_set_voltage_sel,
204 .list_voltage = regulator_list_voltage_table,
207 /* Operations permitted on LDOx */
208 static struct regulator_ops tps65023_ldo_ops = {
209 .is_enabled = regulator_is_enabled_regmap,
210 .enable = regulator_enable_regmap,
211 .disable = regulator_disable_regmap,
212 .get_voltage_sel = regulator_get_voltage_sel_regmap,
213 .set_voltage_sel = regulator_set_voltage_sel_regmap,
214 .list_voltage = regulator_list_voltage_table,
217 static struct regmap_config tps65023_regmap_config = {
222 static int __devinit tps_65023_probe(struct i2c_client *client,
223 const struct i2c_device_id *id)
225 const struct tps_driver_data *drv_data = (void *)id->driver_data;
226 const struct tps_info *info = drv_data->info;
227 struct regulator_config config = { };
228 struct regulator_init_data *init_data;
229 struct regulator_dev *rdev;
230 struct tps_pmic *tps;
234 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
238 * init_data points to array of regulator_init structures
239 * coming from the board-evm file.
241 init_data = client->dev.platform_data;
245 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
249 tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
250 if (IS_ERR(tps->regmap)) {
251 error = PTR_ERR(tps->regmap);
252 dev_err(&client->dev, "Failed to allocate register map: %d\n",
257 /* common for all regulators */
258 tps->core_regulator = drv_data->core_regulator;
260 for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
261 /* Store regulator specific information */
264 tps->desc[i].name = info->name;
266 tps->desc[i].n_voltages = info->table_len;
267 tps->desc[i].volt_table = info->table;
268 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
269 &tps65023_ldo_ops : &tps65023_dcdc_ops);
270 tps->desc[i].type = REGULATOR_VOLTAGE;
271 tps->desc[i].owner = THIS_MODULE;
273 tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
276 tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
277 tps->desc[i].vsel_mask = 0x07;
278 tps->desc[i].enable_mask = 1 << 1;
281 tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
282 tps->desc[i].vsel_mask = 0x70;
283 tps->desc[i].enable_mask = 1 << 2;
286 tps->desc[i].enable_mask =
287 1 << (TPS65023_NUM_REGULATOR - i);
290 config.dev = &client->dev;
291 config.init_data = init_data;
292 config.driver_data = tps;
293 config.regmap = tps->regmap;
295 /* Register the regulators */
296 rdev = regulator_register(&tps->desc[i], &config);
298 dev_err(&client->dev, "failed to register %s\n",
300 error = PTR_ERR(rdev);
304 /* Save regulator for cleanup */
308 i2c_set_clientdata(client, tps);
310 /* Enable setting output voltage by I2C */
311 regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
312 TPS65023_REG_CTRL2_CORE_ADJ, TPS65023_REG_CTRL2_CORE_ADJ);
318 regulator_unregister(tps->rdev[i]);
322 static int __devexit tps_65023_remove(struct i2c_client *client)
324 struct tps_pmic *tps = i2c_get_clientdata(client);
327 for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
328 regulator_unregister(tps->rdev[i]);
332 static const struct tps_info tps65020_regs[] = {
335 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
336 .table = DCDC_FIXED_3300000_VSEL_table,
340 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
341 .table = DCDC_FIXED_1800000_VSEL_table,
345 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
346 .table = VCORE_VSEL_table,
350 .table_len = ARRAY_SIZE(TPS65020_LDO1_VSEL_table),
351 .table = TPS65020_LDO1_VSEL_table,
355 .table_len = ARRAY_SIZE(TPS65020_LDO2_VSEL_table),
356 .table = TPS65020_LDO2_VSEL_table,
360 static const struct tps_info tps65021_regs[] = {
363 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
364 .table = DCDC_FIXED_3300000_VSEL_table,
368 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
369 .table = DCDC_FIXED_1800000_VSEL_table,
373 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
374 .table = VCORE_VSEL_table,
378 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
379 .table = TPS65023_LDO1_VSEL_table,
383 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
384 .table = TPS65023_LDO2_VSEL_table,
388 static const struct tps_info tps65023_regs[] = {
391 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
392 .table = VCORE_VSEL_table,
396 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
397 .table = DCDC_FIXED_3300000_VSEL_table,
401 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
402 .table = DCDC_FIXED_1800000_VSEL_table,
406 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
407 .table = TPS65023_LDO1_VSEL_table,
411 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
412 .table = TPS65023_LDO2_VSEL_table,
416 static struct tps_driver_data tps65020_drv_data = {
417 .info = tps65020_regs,
418 .core_regulator = TPS65023_DCDC_3,
421 static struct tps_driver_data tps65021_drv_data = {
422 .info = tps65021_regs,
423 .core_regulator = TPS65023_DCDC_3,
426 static struct tps_driver_data tps65023_drv_data = {
427 .info = tps65023_regs,
428 .core_regulator = TPS65023_DCDC_1,
431 static const struct i2c_device_id tps_65023_id[] = {
433 .driver_data = (unsigned long) &tps65023_drv_data},
435 .driver_data = (unsigned long) &tps65021_drv_data,},
437 .driver_data = (unsigned long) &tps65020_drv_data},
441 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
443 static struct i2c_driver tps_65023_i2c_driver = {
446 .owner = THIS_MODULE,
448 .probe = tps_65023_probe,
449 .remove = __devexit_p(tps_65023_remove),
450 .id_table = tps_65023_id,
453 static int __init tps_65023_init(void)
455 return i2c_add_driver(&tps_65023_i2c_driver);
457 subsys_initcall(tps_65023_init);
459 static void __exit tps_65023_cleanup(void)
461 i2c_del_driver(&tps_65023_i2c_driver);
463 module_exit(tps_65023_cleanup);
465 MODULE_AUTHOR("Texas Instruments");
466 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
467 MODULE_LICENSE("GPL v2");