1/*
2 * tps65023-regulator.c
3 *
4 * Supports TPS65023 Regulator
5 *
6 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
7 *
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.
11 *
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.
16 */
17
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>
28
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
39
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)
48
49/* MASK bitfields */
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)
57
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)
64
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)
71
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)
78
79/* DCDCs */
80#define TPS65023_DCDC_1 0
81#define TPS65023_DCDC_2 1
82#define TPS65023_DCDC_3 2
83/* LDOs */
84#define TPS65023_LDO_1 3
85#define TPS65023_LDO_2 4
86
87#define TPS65023_MAX_REG_ID TPS65023_LDO_2
88
89#define TPS65023_REGULATOR_DCDC(_num, _t, _em) \
90 { \
91 .name = "VDCDC"#_num, \
92 .of_match = of_match_ptr("VDCDC"#_num), \
93 .regulators_node = of_match_ptr("regulators"), \
94 .id = TPS65023_DCDC_##_num, \
95 .n_voltages = ARRAY_SIZE(_t), \
96 .ops = &tps65023_dcdc_ops, \
97 .type = REGULATOR_VOLTAGE, \
98 .owner = THIS_MODULE, \
99 .volt_table = _t, \
100 .vsel_reg = TPS65023_REG_DEF_CORE, \
101 .vsel_mask = ARRAY_SIZE(_t) - 1, \
102 .enable_mask = _em, \
103 .enable_reg = TPS65023_REG_REG_CTRL, \
104 .apply_reg = TPS65023_REG_CON_CTRL2, \
105 .apply_bit = TPS65023_REG_CTRL2_GO, \
106 } \
107
108#define TPS65023_REGULATOR_LDO(_num, _t, _vm) \
109 { \
110 .name = "LDO"#_num, \
111 .of_match = of_match_ptr("LDO"#_num), \
112 .regulators_node = of_match_ptr("regulators"), \
113 .id = TPS65023_LDO_##_num, \
114 .n_voltages = ARRAY_SIZE(_t), \
115 .ops = &tps65023_ldo_ops, \
116 .type = REGULATOR_VOLTAGE, \
117 .owner = THIS_MODULE, \
118 .volt_table = _t, \
119 .vsel_reg = TPS65023_REG_LDO_CTRL, \
120 .vsel_mask = _vm, \
121 .enable_mask = 1 << (_num), \
122 .enable_reg = TPS65023_REG_REG_CTRL, \
123 } \
124
125/* Supported voltage values for regulators */
126static const unsigned int VCORE_VSEL_table[] = {
127 800000, 825000, 850000, 875000,
128 900000, 925000, 950000, 975000,
129 1000000, 1025000, 1050000, 1075000,
130 1100000, 1125000, 1150000, 1175000,
131 1200000, 1225000, 1250000, 1275000,
132 1300000, 1325000, 1350000, 1375000,
133 1400000, 1425000, 1450000, 1475000,
134 1500000, 1525000, 1550000, 1600000,
135};
136
137static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
138 3300000,
139};
140
141static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
142 1800000,
143};
144
145/* Supported voltage values for LDO regulators for tps65020 */
146static const unsigned int TPS65020_LDO_VSEL_table[] = {
147 1000000, 1050000, 1100000, 1300000,
148 1800000, 2500000, 3000000, 3300000,
149};
150
151/* Supported voltage values for LDO regulators
152 * for tps65021 and tps65023 */
153static const unsigned int TPS65023_LDO1_VSEL_table[] = {
154 1000000, 1100000, 1300000, 1800000,
155 2200000, 2600000, 2800000, 3150000,
156};
157
158static const unsigned int TPS65023_LDO2_VSEL_table[] = {
159 1050000, 1200000, 1300000, 1800000,
160 2500000, 2800000, 3000000, 3300000,
161};
162
163/* PMIC details */
164struct tps_pmic {
165 struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
166 const struct tps_driver_data *driver_data;
167 struct regmap *regmap;
168};
169
170/* Struct passed as driver data */
171struct tps_driver_data {
172 const struct regulator_desc *desc;
173 u8 core_regulator;
174};
175
176static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
177{
178 struct tps_pmic *tps = rdev_get_drvdata(dev);
179 int dcdc = rdev_get_id(dev);
180
181 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
182 return -EINVAL;
183
184 if (dcdc != tps->driver_data->core_regulator)
185 return 0;
186
187 return regulator_get_voltage_sel_regmap(dev);
188}
189
190static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
191 unsigned selector)
192{
193 struct tps_pmic *tps = rdev_get_drvdata(dev);
194 int dcdc = rdev_get_id(dev);
195
196 if (dcdc != tps->driver_data->core_regulator)
197 return -EINVAL;
198
199 return regulator_set_voltage_sel_regmap(dev, selector);
200}
201
202/* Operations permitted on VDCDCx */
203static const struct regulator_ops tps65023_dcdc_ops = {
204 .is_enabled = regulator_is_enabled_regmap,
205 .enable = regulator_enable_regmap,
206 .disable = regulator_disable_regmap,
207 .get_voltage_sel = tps65023_dcdc_get_voltage_sel,
208 .set_voltage_sel = tps65023_dcdc_set_voltage_sel,
209 .list_voltage = regulator_list_voltage_table,
210 .map_voltage = regulator_map_voltage_ascend,
211};
212
213/* Operations permitted on LDOx */
214static const struct regulator_ops tps65023_ldo_ops = {
215 .is_enabled = regulator_is_enabled_regmap,
216 .enable = regulator_enable_regmap,
217 .disable = regulator_disable_regmap,
218 .get_voltage_sel = regulator_get_voltage_sel_regmap,
219 .set_voltage_sel = regulator_set_voltage_sel_regmap,
220 .list_voltage = regulator_list_voltage_table,
221 .map_voltage = regulator_map_voltage_ascend,
222};
223
224static const struct regmap_config tps65023_regmap_config = {
225 .reg_bits = 8,
226 .val_bits = 8,
227};
228
229static const struct regulator_desc tps65020_regulators[] = {
230 TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20),
231 TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10),
232 TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08),
233 TPS65023_REGULATOR_LDO(1, TPS65020_LDO_VSEL_table, 0x07),
234 TPS65023_REGULATOR_LDO(2, TPS65020_LDO_VSEL_table, 0x70),
235};
236
237static const struct regulator_desc tps65021_regulators[] = {
238 TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20),
239 TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10),
240 TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08),
241 TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07),
242 TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
243};
244
245static const struct regulator_desc tps65023_regulators[] = {
246 TPS65023_REGULATOR_DCDC(1, VCORE_VSEL_table, 0x20),
247 TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_3300000_VSEL_table, 0x10),
248 TPS65023_REGULATOR_DCDC(3, DCDC_FIXED_1800000_VSEL_table, 0x08),
249 TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07),
250 TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
251};
252
253static struct tps_driver_data tps65020_drv_data = {
254 .desc = tps65020_regulators,
255 .core_regulator = TPS65023_DCDC_3,
256};
257
258static struct tps_driver_data tps65021_drv_data = {
259 .desc = tps65021_regulators,
260 .core_regulator = TPS65023_DCDC_3,
261};
262
263static struct tps_driver_data tps65023_drv_data = {
264 .desc = tps65023_regulators,
265 .core_regulator = TPS65023_DCDC_1,
266};
267
268static int tps_65023_probe(struct i2c_client *client,
269 const struct i2c_device_id *id)
270{
271 struct regulator_init_data *init_data = dev_get_platdata(&client->dev);
272 struct regulator_config config = { };
273 struct tps_pmic *tps;
274 int i;
275 int error;
276
277 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
278 if (!tps)
279 return -ENOMEM;
280
281 tps->driver_data = (struct tps_driver_data *)id->driver_data;
282
283 tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
284 if (IS_ERR(tps->regmap)) {
285 error = PTR_ERR(tps->regmap);
286 dev_err(&client->dev, "Failed to allocate register map: %d\n",
287 error);
288 return error;
289 }
290
291 /* common for all regulators */
292 config.dev = &client->dev;
293 config.driver_data = tps;
294 config.regmap = tps->regmap;
295
296 for (i = 0; i < TPS65023_NUM_REGULATOR; i++) {
297 if (init_data)
298 config.init_data = &init_data[i];
299
300 /* Register the regulators */
301 tps->rdev[i] = devm_regulator_register(&client->dev,
302 &tps->driver_data->desc[i], &config);
303 if (IS_ERR(tps->rdev[i])) {
304 dev_err(&client->dev, "failed to register %s\n",
305 id->name);
306 return PTR_ERR(tps->rdev[i]);
307 }
308 }
309
310 i2c_set_clientdata(client, tps);
311
312 /* Enable setting output voltage by I2C */
313 regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
314 TPS65023_REG_CTRL2_CORE_ADJ, 0);
315
316 return 0;
317}
318
319static const struct of_device_id tps65023_of_match[] = {
320 { .compatible = "ti,tps65020", .data = &tps65020_drv_data},
321 { .compatible = "ti,tps65021", .data = &tps65021_drv_data},
322 { .compatible = "ti,tps65023", .data = &tps65023_drv_data},
323 {},
324};
325MODULE_DEVICE_TABLE(of, tps65023_of_match);
326
327static const struct i2c_device_id tps_65023_id[] = {
328 {
329 .name = "tps65023",
330 .driver_data = (kernel_ulong_t)&tps65023_drv_data
331 }, {
332 .name = "tps65021",
333 .driver_data = (kernel_ulong_t)&tps65021_drv_data
334 }, {
335 .name = "tps65020",
336 .driver_data = (kernel_ulong_t)&tps65020_drv_data
337 },
338 { },
339};
340MODULE_DEVICE_TABLE(i2c, tps_65023_id);
341
342static struct i2c_driver tps_65023_i2c_driver = {
343 .driver = {
344 .name = "tps65023",
345 .of_match_table = of_match_ptr(tps65023_of_match),
346 },
347 .probe = tps_65023_probe,
348 .id_table = tps_65023_id,
349};
350
351static int __init tps_65023_init(void)
352{
353 return i2c_add_driver(&tps_65023_i2c_driver);
354}
355subsys_initcall(tps_65023_init);
356
357static void __exit tps_65023_cleanup(void)
358{
359 i2c_del_driver(&tps_65023_i2c_driver);
360}
361module_exit(tps_65023_cleanup);
362
363MODULE_AUTHOR("Texas Instruments");
364MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
365MODULE_LICENSE("GPL v2");
366