blob: 9eec453b745d87facf2bb339194f0b6f32d80feb [file] [log] [blame]
Wenyou Yang33036f42013-12-24 10:34:28 +08001/*
Beniamino Galvani50a03e32014-07-05 15:20:54 +02002 * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
3 *
4 * http://www.active-semi.com/products/power-management-units/act88xx/
Wenyou Yang33036f42013-12-24 10:34:28 +08005 *
6 * Copyright (C) 2013 Atmel Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/i2c.h>
22#include <linux/err.h>
23#include <linux/platform_device.h>
24#include <linux/regulator/driver.h>
25#include <linux/regulator/act8865.h>
26#include <linux/of.h>
27#include <linux/of_device.h>
28#include <linux/regulator/of_regulator.h>
29#include <linux/regmap.h>
30
31/*
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +020032 * ACT8846 Global Register Map.
33 */
34#define ACT8846_SYS0 0x00
35#define ACT8846_SYS1 0x01
36#define ACT8846_REG1_VSET 0x10
37#define ACT8846_REG1_CTRL 0x12
38#define ACT8846_REG2_VSET0 0x20
39#define ACT8846_REG2_VSET1 0x21
40#define ACT8846_REG2_CTRL 0x22
41#define ACT8846_REG3_VSET0 0x30
42#define ACT8846_REG3_VSET1 0x31
43#define ACT8846_REG3_CTRL 0x32
44#define ACT8846_REG4_VSET0 0x40
45#define ACT8846_REG4_VSET1 0x41
46#define ACT8846_REG4_CTRL 0x42
47#define ACT8846_REG5_VSET 0x50
48#define ACT8846_REG5_CTRL 0x51
49#define ACT8846_REG6_VSET 0x58
50#define ACT8846_REG6_CTRL 0x59
51#define ACT8846_REG7_VSET 0x60
52#define ACT8846_REG7_CTRL 0x61
53#define ACT8846_REG8_VSET 0x68
54#define ACT8846_REG8_CTRL 0x69
55#define ACT8846_REG9_VSET 0x70
56#define ACT8846_REG9_CTRL 0x71
57#define ACT8846_REG10_VSET 0x80
58#define ACT8846_REG10_CTRL 0x81
59#define ACT8846_REG11_VSET 0x90
60#define ACT8846_REG11_CTRL 0x91
61#define ACT8846_REG12_VSET 0xa0
62#define ACT8846_REG12_CTRL 0xa1
63#define ACT8846_REG13_CTRL 0xb1
Romain Perier2b17fa22014-10-14 06:31:10 +000064#define ACT8846_GLB_OFF_CTRL 0xc3
65#define ACT8846_OFF_SYSMASK 0x18
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +020066
67/*
Wenyou Yang33036f42013-12-24 10:34:28 +080068 * ACT8865 Global Register Map.
69 */
70#define ACT8865_SYS_MODE 0x00
71#define ACT8865_SYS_CTRL 0x01
72#define ACT8865_DCDC1_VSET1 0x20
73#define ACT8865_DCDC1_VSET2 0x21
74#define ACT8865_DCDC1_CTRL 0x22
75#define ACT8865_DCDC2_VSET1 0x30
76#define ACT8865_DCDC2_VSET2 0x31
77#define ACT8865_DCDC2_CTRL 0x32
78#define ACT8865_DCDC3_VSET1 0x40
79#define ACT8865_DCDC3_VSET2 0x41
80#define ACT8865_DCDC3_CTRL 0x42
81#define ACT8865_LDO1_VSET 0x50
82#define ACT8865_LDO1_CTRL 0x51
83#define ACT8865_LDO2_VSET 0x54
84#define ACT8865_LDO2_CTRL 0x55
85#define ACT8865_LDO3_VSET 0x60
86#define ACT8865_LDO3_CTRL 0x61
87#define ACT8865_LDO4_VSET 0x64
88#define ACT8865_LDO4_CTRL 0x65
Romain Perier2b17fa22014-10-14 06:31:10 +000089#define ACT8865_MSTROFF 0x20
Wenyou Yang33036f42013-12-24 10:34:28 +080090
91/*
92 * Field Definitions.
93 */
94#define ACT8865_ENA 0x80 /* ON - [7] */
95#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
96
97/*
98 * ACT8865 voltage number
99 */
100#define ACT8865_VOLTAGE_NUM 64
101
102struct act8865 {
Wenyou Yang33036f42013-12-24 10:34:28 +0800103 struct regmap *regmap;
Romain Perier2b17fa22014-10-14 06:31:10 +0000104 int off_reg;
105 int off_mask;
Wenyou Yang33036f42013-12-24 10:34:28 +0800106};
107
108static const struct regmap_config act8865_regmap_config = {
109 .reg_bits = 8,
110 .val_bits = 8,
111};
112
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200113static const struct regulator_linear_range act8865_voltage_ranges[] = {
Wenyou Yang33036f42013-12-24 10:34:28 +0800114 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
115 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
116 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
117};
118
119static struct regulator_ops act8865_ops = {
120 .list_voltage = regulator_list_voltage_linear_range,
121 .map_voltage = regulator_map_voltage_linear_range,
122 .get_voltage_sel = regulator_get_voltage_sel_regmap,
123 .set_voltage_sel = regulator_set_voltage_sel_regmap,
124 .enable = regulator_enable_regmap,
125 .disable = regulator_disable_regmap,
126 .is_enabled = regulator_is_enabled_regmap,
Wenyou Yang33036f42013-12-24 10:34:28 +0800127};
128
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200129#define ACT88xx_REG(_name, _family, _id, _vsel_reg) \
130 [_family##_ID_##_id] = { \
131 .name = _name, \
132 .id = _family##_ID_##_id, \
133 .type = REGULATOR_VOLTAGE, \
134 .ops = &act8865_ops, \
135 .n_voltages = ACT8865_VOLTAGE_NUM, \
136 .linear_ranges = act8865_voltage_ranges, \
137 .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \
138 .vsel_reg = _family##_##_id##_##_vsel_reg, \
139 .vsel_mask = ACT8865_VSEL_MASK, \
140 .enable_reg = _family##_##_id##_CTRL, \
141 .enable_mask = ACT8865_ENA, \
142 .owner = THIS_MODULE, \
143 }
144
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200145static const struct regulator_desc act8846_regulators[] = {
146 ACT88xx_REG("REG1", ACT8846, REG1, VSET),
147 ACT88xx_REG("REG2", ACT8846, REG2, VSET0),
148 ACT88xx_REG("REG3", ACT8846, REG3, VSET0),
149 ACT88xx_REG("REG4", ACT8846, REG4, VSET0),
150 ACT88xx_REG("REG5", ACT8846, REG5, VSET),
151 ACT88xx_REG("REG6", ACT8846, REG6, VSET),
152 ACT88xx_REG("REG7", ACT8846, REG7, VSET),
153 ACT88xx_REG("REG8", ACT8846, REG8, VSET),
154 ACT88xx_REG("REG9", ACT8846, REG9, VSET),
155 ACT88xx_REG("REG10", ACT8846, REG10, VSET),
156 ACT88xx_REG("REG11", ACT8846, REG11, VSET),
157 ACT88xx_REG("REG12", ACT8846, REG12, VSET),
158};
159
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200160static const struct regulator_desc act8865_regulators[] = {
161 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1),
162 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1),
163 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1),
164 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET),
165 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET),
166 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET),
167 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET),
Wenyou Yang33036f42013-12-24 10:34:28 +0800168};
169
170#ifdef CONFIG_OF
171static const struct of_device_id act8865_dt_ids[] = {
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200172 { .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200173 { .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
Wenyou Yang33036f42013-12-24 10:34:28 +0800174 { }
175};
176MODULE_DEVICE_TABLE(of, act8865_dt_ids);
177
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200178static struct of_regulator_match act8846_matches[] = {
179 [ACT8846_ID_REG1] = { .name = "REG1" },
180 [ACT8846_ID_REG2] = { .name = "REG2" },
181 [ACT8846_ID_REG3] = { .name = "REG3" },
182 [ACT8846_ID_REG4] = { .name = "REG4" },
183 [ACT8846_ID_REG5] = { .name = "REG5" },
184 [ACT8846_ID_REG6] = { .name = "REG6" },
185 [ACT8846_ID_REG7] = { .name = "REG7" },
186 [ACT8846_ID_REG8] = { .name = "REG8" },
187 [ACT8846_ID_REG9] = { .name = "REG9" },
188 [ACT8846_ID_REG10] = { .name = "REG10" },
189 [ACT8846_ID_REG11] = { .name = "REG11" },
190 [ACT8846_ID_REG12] = { .name = "REG12" },
191};
192
Wenyou Yang33036f42013-12-24 10:34:28 +0800193static struct of_regulator_match act8865_matches[] = {
194 [ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"},
195 [ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"},
196 [ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"},
197 [ACT8865_ID_LDO1] = { .name = "LDO_REG1"},
198 [ACT8865_ID_LDO2] = { .name = "LDO_REG2"},
199 [ACT8865_ID_LDO3] = { .name = "LDO_REG3"},
200 [ACT8865_ID_LDO4] = { .name = "LDO_REG4"},
201};
202
203static int act8865_pdata_from_dt(struct device *dev,
204 struct device_node **of_node,
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200205 struct act8865_platform_data *pdata,
Beniamino Galvani34e02472014-07-07 23:40:47 +0200206 unsigned long type)
Wenyou Yang33036f42013-12-24 10:34:28 +0800207{
Beniamino Galvani34e02472014-07-07 23:40:47 +0200208 int matched, i, num_matches;
Wenyou Yang33036f42013-12-24 10:34:28 +0800209 struct device_node *np;
210 struct act8865_regulator_data *regulator;
Beniamino Galvani34e02472014-07-07 23:40:47 +0200211 struct of_regulator_match *matches;
Wenyou Yang33036f42013-12-24 10:34:28 +0800212
Sachin Kamat6ea970a2014-02-14 17:19:54 +0530213 np = of_get_child_by_name(dev->of_node, "regulators");
Wenyou Yang33036f42013-12-24 10:34:28 +0800214 if (!np) {
215 dev_err(dev, "missing 'regulators' subnode in DT\n");
216 return -EINVAL;
217 }
218
Beniamino Galvani34e02472014-07-07 23:40:47 +0200219 switch (type) {
220 case ACT8846:
221 matches = act8846_matches;
222 num_matches = ARRAY_SIZE(act8846_matches);
223 break;
224 case ACT8865:
225 matches = act8865_matches;
226 num_matches = ARRAY_SIZE(act8865_matches);
227 break;
228 default:
229 dev_err(dev, "invalid device id %lu\n", type);
230 return -EINVAL;
231 }
232
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200233 matched = of_regulator_match(dev, np, matches, num_matches);
Sachin Kamat0079eb52014-02-17 14:33:29 +0530234 of_node_put(np);
Wenyou Yang33036f42013-12-24 10:34:28 +0800235 if (matched <= 0)
236 return matched;
237
238 pdata->regulators = devm_kzalloc(dev,
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200239 sizeof(struct act8865_regulator_data) *
240 num_matches, GFP_KERNEL);
Sachin Kamat5ee77ef2014-02-18 16:11:08 +0530241 if (!pdata->regulators)
Wenyou Yang33036f42013-12-24 10:34:28 +0800242 return -ENOMEM;
Wenyou Yang33036f42013-12-24 10:34:28 +0800243
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200244 pdata->num_regulators = num_matches;
Wenyou Yang33036f42013-12-24 10:34:28 +0800245 regulator = pdata->regulators;
246
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200247 for (i = 0; i < num_matches; i++) {
Wenyou Yang33036f42013-12-24 10:34:28 +0800248 regulator->id = i;
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200249 regulator->name = matches[i].name;
250 regulator->platform_data = matches[i].init_data;
251 of_node[i] = matches[i].of_node;
Wenyou Yang33036f42013-12-24 10:34:28 +0800252 regulator++;
253 }
254
255 return 0;
256}
257#else
258static inline int act8865_pdata_from_dt(struct device *dev,
259 struct device_node **of_node,
Beniamino Galvani34e02472014-07-07 23:40:47 +0200260 struct act8865_platform_data *pdata,
261 unsigned long type)
Wenyou Yang33036f42013-12-24 10:34:28 +0800262{
263 return 0;
264}
265#endif
266
Beniamino Galvani48a1e1b2014-06-22 17:31:41 +0200267static struct regulator_init_data
268*act8865_get_init_data(int id, struct act8865_platform_data *pdata)
269{
270 int i;
271
272 if (!pdata)
273 return NULL;
274
275 for (i = 0; i < pdata->num_regulators; i++) {
276 if (pdata->regulators[i].id == id)
277 return pdata->regulators[i].platform_data;
278 }
279
280 return NULL;
281}
282
Romain Perier2b17fa22014-10-14 06:31:10 +0000283static struct i2c_client *act8865_i2c_client;
284static void act8865_power_off(void)
285{
286 struct act8865 *act8865;
287
288 act8865 = i2c_get_clientdata(act8865_i2c_client);
289 regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
290 while (1);
291}
292
Wenyou Yang33036f42013-12-24 10:34:28 +0800293static int act8865_pmic_probe(struct i2c_client *client,
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200294 const struct i2c_device_id *i2c_id)
Wenyou Yang33036f42013-12-24 10:34:28 +0800295{
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200296 static const struct regulator_desc *regulators;
297 struct act8865_platform_data pdata_of, *pdata;
Wenyou Yang33036f42013-12-24 10:34:28 +0800298 struct device *dev = &client->dev;
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200299 struct device_node **of_node;
300 int i, ret, num_regulators;
Wenyou Yang33036f42013-12-24 10:34:28 +0800301 struct act8865 *act8865;
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200302 unsigned long type;
Romain Perier2b17fa22014-10-14 06:31:10 +0000303 int off_reg, off_mask;
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200304
305 pdata = dev_get_platdata(dev);
Wenyou Yang33036f42013-12-24 10:34:28 +0800306
307 if (dev->of_node && !pdata) {
308 const struct of_device_id *id;
Wenyou Yang33036f42013-12-24 10:34:28 +0800309
310 id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
311 if (!id)
312 return -ENODEV;
313
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200314 type = (unsigned long) id->data;
315 } else {
316 type = i2c_id->driver_data;
317 }
318
319 switch (type) {
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200320 case ACT8846:
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200321 regulators = act8846_regulators;
322 num_regulators = ARRAY_SIZE(act8846_regulators);
Romain Perier2b17fa22014-10-14 06:31:10 +0000323 off_reg = ACT8846_GLB_OFF_CTRL;
324 off_mask = ACT8846_OFF_SYSMASK;
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200325 break;
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200326 case ACT8865:
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200327 regulators = act8865_regulators;
328 num_regulators = ARRAY_SIZE(act8865_regulators);
Romain Perier2b17fa22014-10-14 06:31:10 +0000329 off_reg = ACT8865_SYS_CTRL;
330 off_mask = ACT8865_MSTROFF;
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200331 break;
332 default:
333 dev_err(dev, "invalid device id %lu\n", type);
334 return -EINVAL;
335 }
336
337 of_node = devm_kzalloc(dev, sizeof(struct device_node *) *
338 num_regulators, GFP_KERNEL);
339 if (!of_node)
340 return -ENOMEM;
341
342 if (dev->of_node && !pdata) {
Beniamino Galvani34e02472014-07-07 23:40:47 +0200343 ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type);
Wenyou Yang33036f42013-12-24 10:34:28 +0800344 if (ret < 0)
345 return ret;
346
347 pdata = &pdata_of;
348 }
349
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200350 if (pdata->num_regulators > num_regulators) {
351 dev_err(dev, "too many regulators: %d\n",
352 pdata->num_regulators);
Wenyou Yang33036f42013-12-24 10:34:28 +0800353 return -EINVAL;
354 }
355
Wenyou Yangf1de2c22013-12-26 14:52:43 +0800356 act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
Wenyou Yang33036f42013-12-24 10:34:28 +0800357 if (!act8865)
358 return -ENOMEM;
359
Wenyou Yang33036f42013-12-24 10:34:28 +0800360 act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
361 if (IS_ERR(act8865->regmap)) {
Axel Lin40d3bc12014-06-30 15:32:09 +0800362 ret = PTR_ERR(act8865->regmap);
Wenyou Yang33036f42013-12-24 10:34:28 +0800363 dev_err(&client->dev, "Failed to allocate register map: %d\n",
Axel Lin40d3bc12014-06-30 15:32:09 +0800364 ret);
365 return ret;
Wenyou Yang33036f42013-12-24 10:34:28 +0800366 }
367
Romain Perier8f731102014-11-25 12:28:25 +0000368 if (of_device_is_system_power_controller(dev->of_node)) {
Romain Perier2b17fa22014-10-14 06:31:10 +0000369 if (!pm_power_off) {
370 act8865_i2c_client = client;
371 act8865->off_reg = off_reg;
372 act8865->off_mask = off_mask;
373 pm_power_off = act8865_power_off;
374 } else {
375 dev_err(dev, "Failed to set poweroff capability, already defined\n");
376 }
377 }
378
Wenyou Yang33036f42013-12-24 10:34:28 +0800379 /* Finally register devices */
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200380 for (i = 0; i < num_regulators; i++) {
381 const struct regulator_desc *desc = &regulators[i];
382 struct regulator_config config = { };
383 struct regulator_dev *rdev;
Wenyou Yang33036f42013-12-24 10:34:28 +0800384
385 config.dev = dev;
Beniamino Galvani48a1e1b2014-06-22 17:31:41 +0200386 config.init_data = act8865_get_init_data(desc->id, pdata);
Wenyou Yang33036f42013-12-24 10:34:28 +0800387 config.of_node = of_node[i];
388 config.driver_data = act8865;
389 config.regmap = act8865->regmap;
390
Beniamino Galvani48a1e1b2014-06-22 17:31:41 +0200391 rdev = devm_regulator_register(&client->dev, desc, &config);
Axel Linfb8eb452014-03-08 21:19:07 +0800392 if (IS_ERR(rdev)) {
Beniamino Galvani48a1e1b2014-06-22 17:31:41 +0200393 dev_err(dev, "failed to register %s\n", desc->name);
Axel Linfb8eb452014-03-08 21:19:07 +0800394 return PTR_ERR(rdev);
Wenyou Yang33036f42013-12-24 10:34:28 +0800395 }
396 }
397
398 i2c_set_clientdata(client, act8865);
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200399 devm_kfree(dev, of_node);
Wenyou Yang33036f42013-12-24 10:34:28 +0800400
401 return 0;
402}
403
Wenyou Yang33036f42013-12-24 10:34:28 +0800404static const struct i2c_device_id act8865_ids[] = {
Beniamino Galvaniac0c0ea2014-07-05 15:20:55 +0200405 { .name = "act8846", .driver_data = ACT8846 },
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200406 { .name = "act8865", .driver_data = ACT8865 },
Wenyou Yang33036f42013-12-24 10:34:28 +0800407 { },
408};
409MODULE_DEVICE_TABLE(i2c, act8865_ids);
410
411static struct i2c_driver act8865_pmic_driver = {
412 .driver = {
413 .name = "act8865",
414 .owner = THIS_MODULE,
415 },
416 .probe = act8865_pmic_probe,
Wenyou Yang33036f42013-12-24 10:34:28 +0800417 .id_table = act8865_ids,
418};
419
420module_i2c_driver(act8865_pmic_driver);
421
Beniamino Galvani50a03e32014-07-05 15:20:54 +0200422MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
Wenyou Yang33036f42013-12-24 10:34:28 +0800423MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
424MODULE_LICENSE("GPL v2");