2 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/err.h>
23 #include <linux/of_device.h>
24 #include <linux/regulator/of_regulator.h>
25 #include <linux/platform_device.h>
26 #include <linux/regulator/driver.h>
27 #include <linux/regulator/machine.h>
28 #include <linux/regulator/pfuze100.h>
29 #include <linux/i2c.h>
30 #include <linux/slab.h>
31 #include <linux/regmap.h>
33 #define PFUZE_NUMREGS 128
34 #define PFUZE100_VOL_OFFSET 0
35 #define PFUZE100_STANDBY_OFFSET 1
36 #define PFUZE100_MODE_OFFSET 3
37 #define PFUZE100_CONF_OFFSET 4
39 #define PFUZE100_DEVICEID 0x0
40 #define PFUZE100_REVID 0x3
41 #define PFUZE100_FABID 0x4
43 #define PFUZE100_SW1ABVOL 0x20
44 #define PFUZE100_SW1CVOL 0x2e
45 #define PFUZE100_SW2VOL 0x35
46 #define PFUZE100_SW3AVOL 0x3c
47 #define PFUZE100_SW3BVOL 0x43
48 #define PFUZE100_SW4VOL 0x4a
49 #define PFUZE100_SWBSTCON1 0x66
50 #define PFUZE100_VREFDDRCON 0x6a
51 #define PFUZE100_VSNVSVOL 0x6b
52 #define PFUZE100_VGEN1VOL 0x6c
53 #define PFUZE100_VGEN2VOL 0x6d
54 #define PFUZE100_VGEN3VOL 0x6e
55 #define PFUZE100_VGEN4VOL 0x6f
56 #define PFUZE100_VGEN5VOL 0x70
57 #define PFUZE100_VGEN6VOL 0x71
59 enum chips {PFUZE100, PFUZE200, PFUZE_NUM};
61 struct pfuze_regulator {
62 struct regulator_desc desc;
63 unsigned char stby_reg;
64 unsigned char stby_mask;
69 struct regmap *regmap;
71 struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
72 struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
75 static const int pfuze100_swbst[] = {
76 5000000, 5050000, 5100000, 5150000,
79 static const int pfuze100_vsnvs[] = {
80 1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
83 static const struct i2c_device_id pfuze_device_id[PFUZE_NUM] = {
84 {.name = "pfuze100", .driver_data = PFUZE100},
85 {.name = "pfuze200", .driver_data = PFUZE200},
87 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
89 static const struct of_device_id pfuze_dt_ids[PFUZE_NUM] = {
90 { .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
91 { .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
93 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
95 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
97 struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
98 int id = rdev->desc->id;
99 unsigned int ramp_bits;
102 if (id < PFUZE100_SWBST) {
103 ramp_delay = 12500 / ramp_delay;
104 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
105 ret = regmap_update_bits(pfuze100->regmap,
106 rdev->desc->vsel_reg + 4,
107 0xc0, ramp_bits << 6);
109 dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
116 static struct regulator_ops pfuze100_ldo_regulator_ops = {
117 .enable = regulator_enable_regmap,
118 .disable = regulator_disable_regmap,
119 .is_enabled = regulator_is_enabled_regmap,
120 .list_voltage = regulator_list_voltage_linear,
121 .set_voltage_sel = regulator_set_voltage_sel_regmap,
122 .get_voltage_sel = regulator_get_voltage_sel_regmap,
125 static struct regulator_ops pfuze100_fixed_regulator_ops = {
126 .list_voltage = regulator_list_voltage_linear,
129 static struct regulator_ops pfuze100_sw_regulator_ops = {
130 .list_voltage = regulator_list_voltage_linear,
131 .set_voltage_sel = regulator_set_voltage_sel_regmap,
132 .get_voltage_sel = regulator_get_voltage_sel_regmap,
133 .set_voltage_time_sel = regulator_set_voltage_time_sel,
134 .set_ramp_delay = pfuze100_set_ramp_delay,
137 static struct regulator_ops pfuze100_swb_regulator_ops = {
138 .list_voltage = regulator_list_voltage_table,
139 .map_voltage = regulator_map_voltage_ascend,
140 .set_voltage_sel = regulator_set_voltage_sel_regmap,
141 .get_voltage_sel = regulator_get_voltage_sel_regmap,
145 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
146 [_chip ## _ ## _name] = { \
150 .ops = &pfuze100_fixed_regulator_ops, \
151 .type = REGULATOR_VOLTAGE, \
152 .id = _chip ## _ ## _name, \
153 .owner = THIS_MODULE, \
154 .min_uV = (voltage), \
155 .enable_reg = (base), \
156 .enable_mask = 0x10, \
160 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step) \
161 [_chip ## _ ## _name] = { \
164 .n_voltages = ((max) - (min)) / (step) + 1, \
165 .ops = &pfuze100_sw_regulator_ops, \
166 .type = REGULATOR_VOLTAGE, \
167 .id = _chip ## _ ## _name, \
168 .owner = THIS_MODULE, \
171 .vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
174 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
178 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages) \
179 [_chip ## _ ## _name] = { \
182 .n_voltages = ARRAY_SIZE(voltages), \
183 .ops = &pfuze100_swb_regulator_ops, \
184 .type = REGULATOR_VOLTAGE, \
185 .id = _chip ## _ ## _name, \
186 .owner = THIS_MODULE, \
187 .volt_table = voltages, \
188 .vsel_reg = (base), \
189 .vsel_mask = (mask), \
193 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step) \
194 [_chip ## _ ## _name] = { \
197 .n_voltages = ((max) - (min)) / (step) + 1, \
198 .ops = &pfuze100_ldo_regulator_ops, \
199 .type = REGULATOR_VOLTAGE, \
200 .id = _chip ## _ ## _name, \
201 .owner = THIS_MODULE, \
204 .vsel_reg = (base), \
206 .enable_reg = (base), \
207 .enable_mask = 0x10, \
209 .stby_reg = (base), \
214 static struct pfuze_regulator pfuze100_regulators[] = {
215 PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
216 PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
217 PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
218 PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
219 PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
220 PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
221 PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
222 PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
223 PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
224 PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
225 PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
226 PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
227 PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
228 PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
229 PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
232 static struct pfuze_regulator pfuze200_regulators[] = {
233 PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
234 PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
235 PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
236 PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
237 PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
238 PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
239 PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
240 PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
241 PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
242 PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
243 PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
244 PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
245 PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
248 static struct pfuze_regulator *pfuze_regulators;
252 static struct of_regulator_match pfuze100_matches[] = {
253 { .name = "sw1ab", },
259 { .name = "swbst", },
260 { .name = "vsnvs", },
261 { .name = "vrefddr", },
262 { .name = "vgen1", },
263 { .name = "vgen2", },
264 { .name = "vgen3", },
265 { .name = "vgen4", },
266 { .name = "vgen5", },
267 { .name = "vgen6", },
271 static struct of_regulator_match pfuze200_matches[] = {
273 { .name = "sw1ab", },
277 { .name = "swbst", },
278 { .name = "vsnvs", },
279 { .name = "vrefddr", },
280 { .name = "vgen1", },
281 { .name = "vgen2", },
282 { .name = "vgen3", },
283 { .name = "vgen4", },
284 { .name = "vgen5", },
285 { .name = "vgen6", },
288 static struct of_regulator_match *pfuze_matches;
290 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
292 struct device *dev = chip->dev;
293 struct device_node *np, *parent;
296 np = of_node_get(dev->of_node);
300 parent = of_get_child_by_name(np, "regulators");
302 dev_err(dev, "regulators node not found\n");
306 switch (chip->chip_id) {
308 pfuze_matches = pfuze200_matches;
309 ret = of_regulator_match(dev, parent, pfuze200_matches,
310 ARRAY_SIZE(pfuze200_matches));
315 pfuze_matches = pfuze100_matches;
316 ret = of_regulator_match(dev, parent, pfuze100_matches,
317 ARRAY_SIZE(pfuze100_matches));
323 dev_err(dev, "Error parsing regulator init data: %d\n",
331 static inline struct regulator_init_data *match_init_data(int index)
333 return pfuze_matches[index].init_data;
336 static inline struct device_node *match_of_node(int index)
338 return pfuze_matches[index].of_node;
341 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
346 static inline struct regulator_init_data *match_init_data(int index)
351 static inline struct device_node *match_of_node(int index)
357 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
362 ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
366 if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
368 * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
369 * as ID=8 in PFUZE100
371 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
372 } else if ((value & 0x0f) != pfuze_chip->chip_id) {
373 /* device id NOT match with your setting */
374 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
378 ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
381 dev_info(pfuze_chip->dev,
382 "Full layer: %x, Metal layer: %x\n",
383 (value & 0xf0) >> 4, value & 0x0f);
385 ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
388 dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
389 (value & 0xc) >> 2, value & 0x3);
394 static const struct regmap_config pfuze_regmap_config = {
397 .max_register = PFUZE_NUMREGS - 1,
398 .cache_type = REGCACHE_RBTREE,
401 static int pfuze100_regulator_probe(struct i2c_client *client,
402 const struct i2c_device_id *id)
404 struct pfuze_chip *pfuze_chip;
405 struct pfuze_regulator_platform_data *pdata =
406 dev_get_platdata(&client->dev);
407 struct regulator_config config = { };
409 const struct of_device_id *match;
411 u32 sw_check_start, sw_check_end;
413 pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
418 if (client->dev.of_node) {
419 match = of_match_device(of_match_ptr(pfuze_dt_ids),
422 dev_err(&client->dev, "Error: No device match found\n");
425 pfuze_chip->chip_id = (int)(long)match->data;
427 pfuze_chip->chip_id = id->driver_data;
429 dev_err(&client->dev, "No dts match or id table match found\n");
433 i2c_set_clientdata(client, pfuze_chip);
434 pfuze_chip->dev = &client->dev;
436 pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
437 if (IS_ERR(pfuze_chip->regmap)) {
438 ret = PTR_ERR(pfuze_chip->regmap);
439 dev_err(&client->dev,
440 "regmap allocation failed with err %d\n", ret);
444 ret = pfuze_identify(pfuze_chip);
446 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
450 /* use the right regulators after identify the right device */
451 switch (pfuze_chip->chip_id) {
453 pfuze_regulators = pfuze200_regulators;
454 regulator_num = ARRAY_SIZE(pfuze200_regulators);
455 sw_check_start = PFUZE200_SW2;
456 sw_check_end = PFUZE200_SW3B;
461 pfuze_regulators = pfuze100_regulators;
462 regulator_num = ARRAY_SIZE(pfuze100_regulators);
463 sw_check_start = PFUZE100_SW2;
464 sw_check_end = PFUZE100_SW4;
467 dev_info(&client->dev, "pfuze%s found.\n",
468 (pfuze_chip->chip_id == PFUZE100) ? "100" : "200");
470 memcpy(pfuze_chip->regulator_descs, pfuze_regulators,
471 sizeof(pfuze_chip->regulator_descs));
473 ret = pfuze_parse_regulators_dt(pfuze_chip);
477 for (i = 0; i < regulator_num; i++) {
478 struct regulator_init_data *init_data;
479 struct regulator_desc *desc;
482 desc = &pfuze_chip->regulator_descs[i].desc;
485 init_data = pdata->init_data[i];
487 init_data = match_init_data(i);
489 /* SW2~SW4 high bit check and modify the voltage value table */
490 if (i >= sw_check_start && i <= sw_check_end) {
491 regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
493 desc->min_uV = 800000;
494 desc->uV_step = 50000;
495 desc->n_voltages = 51;
499 config.dev = &client->dev;
500 config.init_data = init_data;
501 config.driver_data = pfuze_chip;
502 config.of_node = match_of_node(i);
504 pfuze_chip->regulators[i] =
505 devm_regulator_register(&client->dev, desc, &config);
506 if (IS_ERR(pfuze_chip->regulators[i])) {
507 dev_err(&client->dev, "register regulator%s failed\n",
508 pfuze_regulators[i].desc.name);
509 return PTR_ERR(pfuze_chip->regulators[i]);
516 static struct i2c_driver pfuze_driver = {
517 .id_table = pfuze_device_id,
519 .name = "pfuze100-regulator",
520 .owner = THIS_MODULE,
521 .of_match_table = pfuze_dt_ids,
523 .probe = pfuze100_regulator_probe,
525 module_i2c_driver(pfuze_driver);
527 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
528 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100 PMIC");
529 MODULE_LICENSE("GPL v2");
530 MODULE_ALIAS("i2c:pfuze100-regulator");