tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
3 *
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.
8 *
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.
13 *
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
17 */
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/err.h>
22#include <linux/of.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>
32
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
38
39#define PFUZE100_DEVICEID 0x0
40#define PFUZE100_REVID 0x3
41#define PFUZE100_FABID 0x3
42
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
58
59struct pfuze_regulator {
60 struct regulator_desc desc;
61 unsigned char stby_reg;
62 unsigned char stby_mask;
63};
64
65struct pfuze_chip {
66 struct regmap *regmap;
67 struct device *dev;
68 struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
69 struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
70};
71
72static const int pfuze100_swbst[] = {
73 5000000, 5050000, 5100000, 5150000,
74};
75
76static const int pfuze100_vsnvs[] = {
77 1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
78};
79
80static const struct i2c_device_id pfuze_device_id[] = {
81 {.name = "pfuze100"},
82 {},
83};
84MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
85
86static const struct of_device_id pfuze_dt_ids[] = {
87 { .compatible = "fsl,pfuze100" },
88 {},
89};
90MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
91
92static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
93{
94 struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
95 int id = rdev->desc->id;
96 unsigned int ramp_bits;
97 int ret;
98
99 if (id < PFUZE100_SWBST) {
100 ramp_delay = 12500 / ramp_delay;
101 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
102 ret = regmap_update_bits(pfuze100->regmap,
103 rdev->desc->vsel_reg + 4,
104 0xc0, ramp_bits << 6);
105 if (ret < 0)
106 dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
107 } else
108 ret = -EACCES;
109
110 return ret;
111}
112
113static struct regulator_ops pfuze100_ldo_regulator_ops = {
114 .enable = regulator_enable_regmap,
115 .disable = regulator_disable_regmap,
116 .is_enabled = regulator_is_enabled_regmap,
117 .list_voltage = regulator_list_voltage_linear,
118 .set_voltage_sel = regulator_set_voltage_sel_regmap,
119 .get_voltage_sel = regulator_get_voltage_sel_regmap,
120};
121
122static struct regulator_ops pfuze100_fixed_regulator_ops = {
123 .list_voltage = regulator_list_voltage_linear,
124};
125
126static struct regulator_ops pfuze100_sw_regulator_ops = {
127 .list_voltage = regulator_list_voltage_linear,
128 .set_voltage_sel = regulator_set_voltage_sel_regmap,
129 .get_voltage_sel = regulator_get_voltage_sel_regmap,
130 .set_voltage_time_sel = regulator_set_voltage_time_sel,
131 .set_ramp_delay = pfuze100_set_ramp_delay,
132};
133
134static struct regulator_ops pfuze100_swb_regulator_ops = {
135 .list_voltage = regulator_list_voltage_table,
136 .map_voltage = regulator_map_voltage_ascend,
137 .set_voltage_sel = regulator_set_voltage_sel_regmap,
138 .get_voltage_sel = regulator_get_voltage_sel_regmap,
139
140};
141
142#define PFUZE100_FIXED_REG(_name, base, voltage) \
143 [PFUZE100_ ## _name] = { \
144 .desc = { \
145 .name = #_name, \
146 .n_voltages = 1, \
147 .ops = &pfuze100_fixed_regulator_ops, \
148 .type = REGULATOR_VOLTAGE, \
149 .id = PFUZE100_ ## _name, \
150 .owner = THIS_MODULE, \
151 .min_uV = (voltage), \
152 .enable_reg = (base), \
153 .enable_mask = 0x10, \
154 }, \
155 }
156
157#define PFUZE100_SW_REG(_name, base, min, max, step) \
158 [PFUZE100_ ## _name] = { \
159 .desc = { \
160 .name = #_name,\
161 .n_voltages = ((max) - (min)) / (step) + 1, \
162 .ops = &pfuze100_sw_regulator_ops, \
163 .type = REGULATOR_VOLTAGE, \
164 .id = PFUZE100_ ## _name, \
165 .owner = THIS_MODULE, \
166 .min_uV = (min), \
167 .uV_step = (step), \
168 .vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
169 .vsel_mask = 0x3f, \
170 }, \
171 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
172 .stby_mask = 0x3f, \
173 }
174
175#define PFUZE100_SWB_REG(_name, base, mask, voltages) \
176 [PFUZE100_ ## _name] = { \
177 .desc = { \
178 .name = #_name, \
179 .n_voltages = ARRAY_SIZE(voltages), \
180 .ops = &pfuze100_swb_regulator_ops, \
181 .type = REGULATOR_VOLTAGE, \
182 .id = PFUZE100_ ## _name, \
183 .owner = THIS_MODULE, \
184 .volt_table = voltages, \
185 .vsel_reg = (base), \
186 .vsel_mask = (mask), \
187 }, \
188 }
189
190#define PFUZE100_VGEN_REG(_name, base, min, max, step) \
191 [PFUZE100_ ## _name] = { \
192 .desc = { \
193 .name = #_name, \
194 .n_voltages = ((max) - (min)) / (step) + 1, \
195 .ops = &pfuze100_ldo_regulator_ops, \
196 .type = REGULATOR_VOLTAGE, \
197 .id = PFUZE100_ ## _name, \
198 .owner = THIS_MODULE, \
199 .min_uV = (min), \
200 .uV_step = (step), \
201 .vsel_reg = (base), \
202 .vsel_mask = 0xf, \
203 .enable_reg = (base), \
204 .enable_mask = 0x10, \
205 }, \
206 .stby_reg = (base), \
207 .stby_mask = 0x20, \
208 }
209
210static struct pfuze_regulator pfuze100_regulators[] = {
211 PFUZE100_SW_REG(SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
212 PFUZE100_SW_REG(SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
213 PFUZE100_SW_REG(SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
214 PFUZE100_SW_REG(SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
215 PFUZE100_SW_REG(SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
216 PFUZE100_SW_REG(SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
217 PFUZE100_SWB_REG(SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
218 PFUZE100_SWB_REG(VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
219 PFUZE100_FIXED_REG(VREFDDR, PFUZE100_VREFDDRCON, 750000),
220 PFUZE100_VGEN_REG(VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
221 PFUZE100_VGEN_REG(VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
222 PFUZE100_VGEN_REG(VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
223 PFUZE100_VGEN_REG(VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
224 PFUZE100_VGEN_REG(VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
225 PFUZE100_VGEN_REG(VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
226};
227
228#ifdef CONFIG_OF
229static struct of_regulator_match pfuze100_matches[] = {
230 { .name = "sw1ab", },
231 { .name = "sw1c", },
232 { .name = "sw2", },
233 { .name = "sw3a", },
234 { .name = "sw3b", },
235 { .name = "sw4", },
236 { .name = "swbst", },
237 { .name = "vsnvs", },
238 { .name = "vrefddr", },
239 { .name = "vgen1", },
240 { .name = "vgen2", },
241 { .name = "vgen3", },
242 { .name = "vgen4", },
243 { .name = "vgen5", },
244 { .name = "vgen6", },
245};
246
247static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
248{
249 struct device *dev = chip->dev;
250 struct device_node *np, *parent;
251 int ret;
252
253 np = of_node_get(dev->parent->of_node);
254 if (!np)
255 return 0;
256
257 parent = of_find_node_by_name(np, "regulators");
258 if (!parent) {
259 dev_err(dev, "regulators node not found\n");
260 return -EINVAL;
261 }
262
263 ret = of_regulator_match(dev, parent, pfuze100_matches,
264 ARRAY_SIZE(pfuze100_matches));
265
266 of_node_put(parent);
267 if (ret < 0) {
268 dev_err(dev, "Error parsing regulator init data: %d\n",
269 ret);
270 return ret;
271 }
272
273 return 0;
274}
275
276static inline struct regulator_init_data *match_init_data(int index)
277{
278 return pfuze100_matches[index].init_data;
279}
280
281static inline struct device_node *match_of_node(int index)
282{
283 return pfuze100_matches[index].of_node;
284}
285#else
286static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
287{
288 return 0;
289}
290
291static inline struct regulator_init_data *match_init_data(int index)
292{
293 return NULL;
294}
295
296static inline struct device_node *match_of_node(int index)
297{
298 return NULL;
299}
300#endif
301
302static int pfuze_identify(struct pfuze_chip *pfuze_chip)
303{
304 unsigned int value;
305 int ret;
306
307 ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
308 if (ret)
309 return ret;
310
311 if (value & 0x0f) {
312 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
313 return -ENODEV;
314 }
315
316 ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
317 if (ret)
318 return ret;
319 dev_info(pfuze_chip->dev,
320 "Full lay: %x, Metal lay: %x\n",
321 (value & 0xf0) >> 4, value & 0x0f);
322
323 ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
324 if (ret)
325 return ret;
326 dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
327 (value & 0xc) >> 2, value & 0x3);
328
329 return 0;
330}
331
332static const struct regmap_config pfuze_regmap_config = {
333 .reg_bits = 8,
334 .val_bits = 8,
335 .max_register = PFUZE_NUMREGS - 1,
336 .cache_type = REGCACHE_RBTREE,
337};
338
339static int pfuze100_regulator_probe(struct i2c_client *client,
340 const struct i2c_device_id *id)
341{
342 struct pfuze_chip *pfuze_chip;
343 struct pfuze_regulator_platform_data *pdata =
344 dev_get_platdata(&client->dev);
345 struct regulator_config config = { };
346 int i, ret;
347
348 pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
349 GFP_KERNEL);
350 if (!pfuze_chip)
351 return -ENOMEM;
352
353 i2c_set_clientdata(client, pfuze_chip);
354
355 memcpy(pfuze_chip->regulator_descs, pfuze100_regulators,
356 sizeof(pfuze_chip->regulator_descs));
357
358 pfuze_chip->dev = &client->dev;
359
360 pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
361 if (IS_ERR(pfuze_chip->regmap)) {
362 ret = PTR_ERR(pfuze_chip->regmap);
363 dev_err(&client->dev,
364 "regmap allocation failed with err %d\n", ret);
365 return ret;
366 }
367
368 ret = pfuze_identify(pfuze_chip);
369 if (ret) {
370 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
371 return ret;
372 }
373
374 ret = pfuze_parse_regulators_dt(pfuze_chip);
375 if (ret)
376 return ret;
377
378 for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) {
379 struct regulator_init_data *init_data;
380 struct regulator_desc *desc;
381 int val;
382
383 desc = &pfuze_chip->regulator_descs[i].desc;
384
385 if (pdata)
386 init_data = pdata->init_data[i];
387 else
388 init_data = match_init_data(i);
389
390 /* SW2~SW4 high bit check and modify the voltage value table */
391 if (i > PFUZE100_SW1C && i < PFUZE100_SWBST) {
392 regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
393 if (val & 0x40) {
394 desc->min_uV = 800000;
395 desc->uV_step = 50000;
396 desc->n_voltages = 51;
397 }
398 }
399
400 config.dev = &client->dev;
401 config.init_data = init_data;
402 config.driver_data = pfuze_chip;
403 config.of_node = match_of_node(i);
404
405 pfuze_chip->regulators[i] = regulator_register(desc, &config);
406 if (IS_ERR(pfuze_chip->regulators[i])) {
407 dev_err(&client->dev, "register regulator%s failed\n",
408 pfuze100_regulators[i].desc.name);
409 ret = PTR_ERR(pfuze_chip->regulators[i]);
410 while (--i >= 0)
411 regulator_unregister(pfuze_chip->regulators[i]);
412 return ret;
413 }
414 }
415
416 return 0;
417}
418
419static int pfuze100_regulator_remove(struct i2c_client *client)
420{
421 int i;
422 struct pfuze_chip *pfuze_chip = i2c_get_clientdata(client);
423
424 for (i = 0; i < PFUZE100_MAX_REGULATOR; i++)
425 regulator_unregister(pfuze_chip->regulators[i]);
426
427 return 0;
428}
429
430static struct i2c_driver pfuze_driver = {
431 .id_table = pfuze_device_id,
432 .driver = {
433 .name = "pfuze100-regulator",
434 .owner = THIS_MODULE,
435 .of_match_table = pfuze_dt_ids,
436 },
437 .probe = pfuze100_regulator_probe,
438 .remove = pfuze100_regulator_remove,
439};
440module_i2c_driver(pfuze_driver);
441
442MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
443MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100 PMIC");
444MODULE_LICENSE("GPL v2");
445MODULE_ALIAS("i2c:pfuze100-regulator");