?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
net: move procfs code to net/core/net-procfs.c
[linux/fpc-iii.git] / drivers / regulator / max77686.c
blobcca18a3c0294173293ec0bd6c26b41fbb2b6bb10
1 /*
2 * max77686.c - Regulator driver for the Maxim 77686
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * Chiwoong Byun <woong.byun@smasung.com>
6 * Jonghwa Lee <jonghwa3.lee@samsung.com>
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 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * This driver is based on max8997.c
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/bug.h>
27 #include <linux/delay.h>
28 #include <linux/err.h>
29 #include <linux/gpio.h>
30 #include <linux/slab.h>
31 #include <linux/platform_device.h>
32 #include <linux/regulator/driver.h>
33 #include <linux/regulator/machine.h>
34 #include <linux/regulator/of_regulator.h>
35 #include <linux/mfd/max77686.h>
36 #include <linux/mfd/max77686-private.h>
37
38 #define MAX77686_LDO_MINUV 800000
39 #define MAX77686_LDO_UVSTEP 50000
40 #define MAX77686_LDO_LOW_MINUV 800000
41 #define MAX77686_LDO_LOW_UVSTEP 25000
42 #define MAX77686_BUCK_MINUV 750000
43 #define MAX77686_BUCK_UVSTEP 50000
44 #define MAX77686_RAMP_DELAY 100000 /* uV/us */
45 #define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
46 #define MAX77686_DVS_MINUV 600000
47 #define MAX77686_DVS_UVSTEP 12500
48
49 #define MAX77686_OPMODE_SHIFT 6
50 #define MAX77686_OPMODE_BUCK234_SHIFT 4
51 #define MAX77686_OPMODE_MASK 0x3
52
53 #define MAX77686_VSEL_MASK 0x3F
54 #define MAX77686_DVS_VSEL_MASK 0xFF
55
56 #define MAX77686_RAMP_RATE_MASK 0xC0
57
58 #define MAX77686_REGULATORS MAX77686_REG_MAX
59 #define MAX77686_LDOS 26
60
61 enum max77686_ramp_rate {
62 RAMP_RATE_13P75MV,
63 RAMP_RATE_27P5MV,
64 RAMP_RATE_55MV,
65 RAMP_RATE_NO_CTRL, /* 100mV/us */
66 };
67
68 struct max77686_data {
69 struct regulator_dev *rdev[MAX77686_REGULATORS];
70 unsigned int opmode[MAX77686_REGULATORS];
71 };
72
73 /* Some BUCKS supports Normal[ON/OFF] mode during suspend */
74 static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
75 {
76 unsigned int val;
77 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
78
79 if (rdev->desc->id == MAX77686_BUCK1)
80 val = 0x1;
81 else
82 val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;
83
84 max77686->opmode[rdev->desc->id] = val;
85 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
86 rdev->desc->enable_mask,
87 val);
88 }
89
90 /* Some LDOs supports [LPM/Normal]ON mode during suspend state */
91 static int max77686_set_suspend_mode(struct regulator_dev *rdev,
92 unsigned int mode)
93 {
94 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
95 unsigned int val;
96
97 /* BUCK[5-9] doesn't support this feature */
98 if (rdev->desc->id >= MAX77686_BUCK5)
99 return 0;
100
101 switch (mode) {
102 case REGULATOR_MODE_IDLE: /* ON in LP Mode */
103 val = 0x2 << MAX77686_OPMODE_SHIFT;
104 break;
105 case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
106 val = 0x3 << MAX77686_OPMODE_SHIFT;
107 break;
108 default:
109 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
110 rdev->desc->name, mode);
111 return -EINVAL;
112 }
113
114 max77686->opmode[rdev->desc->id] = val;
115 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
116 rdev->desc->enable_mask,
117 val);
118 }
119
120 /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
121 static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
122 unsigned int mode)
123 {
124 unsigned int val;
125 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
126
127 switch (mode) {
128 case REGULATOR_MODE_STANDBY: /* switch off */
129 val = 0x1 << MAX77686_OPMODE_SHIFT;
130 break;
131 case REGULATOR_MODE_IDLE: /* ON in LP Mode */
132 val = 0x2 << MAX77686_OPMODE_SHIFT;
133 break;
134 case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
135 val = 0x3 << MAX77686_OPMODE_SHIFT;
136 break;
137 default:
138 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
139 rdev->desc->name, mode);
140 return -EINVAL;
141 }
142
143 max77686->opmode[rdev->desc->id] = val;
144 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
145 rdev->desc->enable_mask,
146 val);
147 }
148
149 static int max77686_enable(struct regulator_dev *rdev)
150 {
151 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
152
153 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
154 rdev->desc->enable_mask,
155 max77686->opmode[rdev->desc->id]);
156 }
157
158 static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
159 {
160 unsigned int ramp_value = RAMP_RATE_NO_CTRL;
161
162 switch (ramp_delay) {
163 case 1 ... 13750:
164 ramp_value = RAMP_RATE_13P75MV;
165 break;
166 case 13751 ... 27500:
167 ramp_value = RAMP_RATE_27P5MV;
168 break;
169 case 27501 ... 55000:
170 ramp_value = RAMP_RATE_55MV;
171 break;
172 case 55001 ... 100000:
173 break;
174 default:
175 pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
176 rdev->desc->name, ramp_delay);
177 }
178
179 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
180 MAX77686_RAMP_RATE_MASK, ramp_value << 6);
181 }
182
183 static struct regulator_ops max77686_ops = {
184 .list_voltage = regulator_list_voltage_linear,
185 .map_voltage = regulator_map_voltage_linear,
186 .is_enabled = regulator_is_enabled_regmap,
187 .enable = max77686_enable,
188 .disable = regulator_disable_regmap,
189 .get_voltage_sel = regulator_get_voltage_sel_regmap,
190 .set_voltage_sel = regulator_set_voltage_sel_regmap,
191 .set_voltage_time_sel = regulator_set_voltage_time_sel,
192 .set_suspend_mode = max77686_set_suspend_mode,
193 };
194
195 static struct regulator_ops max77686_ldo_ops = {
196 .list_voltage = regulator_list_voltage_linear,
197 .map_voltage = regulator_map_voltage_linear,
198 .is_enabled = regulator_is_enabled_regmap,
199 .enable = max77686_enable,
200 .disable = regulator_disable_regmap,
201 .get_voltage_sel = regulator_get_voltage_sel_regmap,
202 .set_voltage_sel = regulator_set_voltage_sel_regmap,
203 .set_voltage_time_sel = regulator_set_voltage_time_sel,
204 .set_suspend_mode = max77686_ldo_set_suspend_mode,
205 };
206
207 static struct regulator_ops max77686_buck1_ops = {
208 .list_voltage = regulator_list_voltage_linear,
209 .map_voltage = regulator_map_voltage_linear,
210 .is_enabled = regulator_is_enabled_regmap,
211 .enable = max77686_enable,
212 .disable = regulator_disable_regmap,
213 .get_voltage_sel = regulator_get_voltage_sel_regmap,
214 .set_voltage_sel = regulator_set_voltage_sel_regmap,
215 .set_voltage_time_sel = regulator_set_voltage_time_sel,
216 .set_suspend_disable = max77686_buck_set_suspend_disable,
217 };
218
219 static struct regulator_ops max77686_buck_dvs_ops = {
220 .list_voltage = regulator_list_voltage_linear,
221 .map_voltage = regulator_map_voltage_linear,
222 .is_enabled = regulator_is_enabled_regmap,
223 .enable = max77686_enable,
224 .disable = regulator_disable_regmap,
225 .get_voltage_sel = regulator_get_voltage_sel_regmap,
226 .set_voltage_sel = regulator_set_voltage_sel_regmap,
227 .set_voltage_time_sel = regulator_set_voltage_time_sel,
228 .set_ramp_delay = max77686_set_ramp_delay,
229 .set_suspend_disable = max77686_buck_set_suspend_disable,
230 };
231
232 #define regulator_desc_ldo(num) { \
233 .name = "LDO"#num, \
234 .id = MAX77686_LDO##num, \
235 .ops = &max77686_ops, \
236 .type = REGULATOR_VOLTAGE, \
237 .owner = THIS_MODULE, \
238 .min_uV = MAX77686_LDO_MINUV, \
239 .uV_step = MAX77686_LDO_UVSTEP, \
240 .ramp_delay = MAX77686_RAMP_DELAY, \
241 .n_voltages = MAX77686_VSEL_MASK + 1, \
242 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
243 .vsel_mask = MAX77686_VSEL_MASK, \
244 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
245 .enable_mask = MAX77686_OPMODE_MASK \
246 << MAX77686_OPMODE_SHIFT, \
247 }
248 #define regulator_desc_lpm_ldo(num) { \
249 .name = "LDO"#num, \
250 .id = MAX77686_LDO##num, \
251 .ops = &max77686_ldo_ops, \
252 .type = REGULATOR_VOLTAGE, \
253 .owner = THIS_MODULE, \
254 .min_uV = MAX77686_LDO_MINUV, \
255 .uV_step = MAX77686_LDO_UVSTEP, \
256 .ramp_delay = MAX77686_RAMP_DELAY, \
257 .n_voltages = MAX77686_VSEL_MASK + 1, \
258 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
259 .vsel_mask = MAX77686_VSEL_MASK, \
260 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
261 .enable_mask = MAX77686_OPMODE_MASK \
262 << MAX77686_OPMODE_SHIFT, \
263 }
264 #define regulator_desc_ldo_low(num) { \
265 .name = "LDO"#num, \
266 .id = MAX77686_LDO##num, \
267 .ops = &max77686_ldo_ops, \
268 .type = REGULATOR_VOLTAGE, \
269 .owner = THIS_MODULE, \
270 .min_uV = MAX77686_LDO_LOW_MINUV, \
271 .uV_step = MAX77686_LDO_LOW_UVSTEP, \
272 .ramp_delay = MAX77686_RAMP_DELAY, \
273 .n_voltages = MAX77686_VSEL_MASK + 1, \
274 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
275 .vsel_mask = MAX77686_VSEL_MASK, \
276 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
277 .enable_mask = MAX77686_OPMODE_MASK \
278 << MAX77686_OPMODE_SHIFT, \
279 }
280 #define regulator_desc_ldo1_low(num) { \
281 .name = "LDO"#num, \
282 .id = MAX77686_LDO##num, \
283 .ops = &max77686_ops, \
284 .type = REGULATOR_VOLTAGE, \
285 .owner = THIS_MODULE, \
286 .min_uV = MAX77686_LDO_LOW_MINUV, \
287 .uV_step = MAX77686_LDO_LOW_UVSTEP, \
288 .ramp_delay = MAX77686_RAMP_DELAY, \
289 .n_voltages = MAX77686_VSEL_MASK + 1, \
290 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
291 .vsel_mask = MAX77686_VSEL_MASK, \
292 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
293 .enable_mask = MAX77686_OPMODE_MASK \
294 << MAX77686_OPMODE_SHIFT, \
295 }
296 #define regulator_desc_buck(num) { \
297 .name = "BUCK"#num, \
298 .id = MAX77686_BUCK##num, \
299 .ops = &max77686_ops, \
300 .type = REGULATOR_VOLTAGE, \
301 .owner = THIS_MODULE, \
302 .min_uV = MAX77686_BUCK_MINUV, \
303 .uV_step = MAX77686_BUCK_UVSTEP, \
304 .ramp_delay = MAX77686_RAMP_DELAY, \
305 .n_voltages = MAX77686_VSEL_MASK + 1, \
306 .vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
307 .vsel_mask = MAX77686_VSEL_MASK, \
308 .enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
309 .enable_mask = MAX77686_OPMODE_MASK, \
310 }
311 #define regulator_desc_buck1(num) { \
312 .name = "BUCK"#num, \
313 .id = MAX77686_BUCK##num, \
314 .ops = &max77686_buck1_ops, \
315 .type = REGULATOR_VOLTAGE, \
316 .owner = THIS_MODULE, \
317 .min_uV = MAX77686_BUCK_MINUV, \
318 .uV_step = MAX77686_BUCK_UVSTEP, \
319 .ramp_delay = MAX77686_RAMP_DELAY, \
320 .n_voltages = MAX77686_VSEL_MASK + 1, \
321 .vsel_reg = MAX77686_REG_BUCK1OUT, \
322 .vsel_mask = MAX77686_VSEL_MASK, \
323 .enable_reg = MAX77686_REG_BUCK1CTRL, \
324 .enable_mask = MAX77686_OPMODE_MASK, \
325 }
326 #define regulator_desc_buck_dvs(num) { \
327 .name = "BUCK"#num, \
328 .id = MAX77686_BUCK##num, \
329 .ops = &max77686_buck_dvs_ops, \
330 .type = REGULATOR_VOLTAGE, \
331 .owner = THIS_MODULE, \
332 .min_uV = MAX77686_DVS_MINUV, \
333 .uV_step = MAX77686_DVS_UVSTEP, \
334 .ramp_delay = MAX77686_DVS_RAMP_DELAY, \
335 .n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
336 .vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
337 .vsel_mask = MAX77686_DVS_VSEL_MASK, \
338 .enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
339 .enable_mask = MAX77686_OPMODE_MASK \
340 << MAX77686_OPMODE_BUCK234_SHIFT, \
341 }
342
343 static struct regulator_desc regulators[] = {
344 regulator_desc_ldo1_low(1),
345 regulator_desc_ldo_low(2),
346 regulator_desc_ldo(3),
347 regulator_desc_ldo(4),
348 regulator_desc_ldo(5),
349 regulator_desc_ldo_low(6),
350 regulator_desc_ldo_low(7),
351 regulator_desc_ldo_low(8),
352 regulator_desc_ldo(9),
353 regulator_desc_lpm_ldo(10),
354 regulator_desc_lpm_ldo(11),
355 regulator_desc_lpm_ldo(12),
356 regulator_desc_ldo(13),
357 regulator_desc_lpm_ldo(14),
358 regulator_desc_ldo_low(15),
359 regulator_desc_lpm_ldo(16),
360 regulator_desc_ldo(17),
361 regulator_desc_ldo(18),
362 regulator_desc_ldo(19),
363 regulator_desc_ldo(20),
364 regulator_desc_ldo(21),
365 regulator_desc_ldo(22),
366 regulator_desc_ldo(23),
367 regulator_desc_ldo(24),
368 regulator_desc_ldo(25),
369 regulator_desc_ldo(26),
370 regulator_desc_buck1(1),
371 regulator_desc_buck_dvs(2),
372 regulator_desc_buck_dvs(3),
373 regulator_desc_buck_dvs(4),
374 regulator_desc_buck(5),
375 regulator_desc_buck(6),
376 regulator_desc_buck(7),
377 regulator_desc_buck(8),
378 regulator_desc_buck(9),
379 };
380
381 #ifdef CONFIG_OF
382 static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
383 struct max77686_platform_data *pdata)
384 {
385 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
386 struct device_node *pmic_np, *regulators_np;
387 struct max77686_regulator_data *rdata;
388 struct of_regulator_match rmatch;
389 unsigned int i;
390
391 pmic_np = iodev->dev->of_node;
392 regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");
393 if (!regulators_np) {
394 dev_err(&pdev->dev, "could not find regulators sub-node\n");
395 return -EINVAL;
396 }
397
398 pdata->num_regulators = ARRAY_SIZE(regulators);
399 rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
400 pdata->num_regulators, GFP_KERNEL);
401 if (!rdata) {
402 dev_err(&pdev->dev,
403 "could not allocate memory for regulator data\n");
404 return -ENOMEM;
405 }
406
407 for (i = 0; i < pdata->num_regulators; i++) {
408 rmatch.name = regulators[i].name;
409 rmatch.init_data = NULL;
410 rmatch.of_node = NULL;
411 of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
412 rdata[i].initdata = rmatch.init_data;
413 rdata[i].of_node = rmatch.of_node;
414 }
415
416 pdata->regulators = rdata;
417
418 return 0;
419 }
420 #else
421 static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
422 struct max77686_platform_data *pdata)
423 {
424 return 0;
425 }
426 #endif /* CONFIG_OF */
427
428 static int max77686_pmic_probe(struct platform_device *pdev)
429 {
430 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
431 struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
432 struct max77686_data *max77686;
433 int i, ret = 0;
434 struct regulator_config config = { };
435
436 dev_dbg(&pdev->dev, "%s\n", __func__);
437
438 if (!pdata) {
439 dev_err(&pdev->dev, "no platform data found for regulator\n");
440 return -ENODEV;
441 }
442
443 if (iodev->dev->of_node) {
444 ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
445 if (ret)
446 return ret;
447 }
448
449 if (pdata->num_regulators != MAX77686_REGULATORS) {
450 dev_err(&pdev->dev,
451 "Invalid initial data for regulator's initialiation\n");
452 return -EINVAL;
453 }
454
455 max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
456 GFP_KERNEL);
457 if (!max77686)
458 return -ENOMEM;
459
460 config.dev = &pdev->dev;
461 config.regmap = iodev->regmap;
462 config.driver_data = max77686;
463 platform_set_drvdata(pdev, max77686);
464
465 for (i = 0; i < MAX77686_REGULATORS; i++) {
466 config.init_data = pdata->regulators[i].initdata;
467 config.of_node = pdata->regulators[i].of_node;
468
469 max77686->opmode[i] = regulators[i].enable_mask;
470 max77686->rdev[i] = regulator_register(&regulators[i], &config);
471 if (IS_ERR(max77686->rdev[i])) {
472 ret = PTR_ERR(max77686->rdev[i]);
473 dev_err(&pdev->dev,
474 "regulator init failed for %d\n", i);
475 max77686->rdev[i] = NULL;
476 goto err;
477 }
478 }
479
480 return 0;
481 err:
482 while (--i >= 0)
483 regulator_unregister(max77686->rdev[i]);
484 return ret;
485 }
486
487 static int max77686_pmic_remove(struct platform_device *pdev)
488 {
489 struct max77686_data *max77686 = platform_get_drvdata(pdev);
490 int i;
491
492 for (i = 0; i < MAX77686_REGULATORS; i++)
493 regulator_unregister(max77686->rdev[i]);
494
495 return 0;
496 }
497
498 static const struct platform_device_id max77686_pmic_id[] = {
499 {"max77686-pmic", 0},
500 { },
501 };
502 MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
503
504 static struct platform_driver max77686_pmic_driver = {
505 .driver = {
506 .name = "max77686-pmic",
507 .owner = THIS_MODULE,
508 },
509 .probe = max77686_pmic_probe,
510 .remove = max77686_pmic_remove,
511 .id_table = max77686_pmic_id,
512 };
513
514 static int __init max77686_pmic_init(void)
515 {
516 return platform_driver_register(&max77686_pmic_driver);
517 }
518 subsys_initcall(max77686_pmic_init);
519
520 static void __exit max77686_pmic_cleanup(void)
521 {
522 platform_driver_unregister(&max77686_pmic_driver);
523 }
524 module_exit(max77686_pmic_cleanup);
525
526 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
527 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
528 MODULE_LICENSE("GPL");
Linux with added FPC-III support