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gre: don't allow to add the same tunnel twice
[linux/fpc-iii.git] / drivers / regulator / s2mpa01.c
blob808b3aa7a42cc15ac6373fe4daa9f796d544113f
1 /*
2 * Copyright (c) 2013 Samsung Electronics Co., Ltd
3 * http://www.samsung.com
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 */
11
12 #include <linux/bug.h>
13 #include <linux/err.h>
14 #include <linux/gpio.h>
15 #include <linux/slab.h>
16 #include <linux/module.h>
17 #include <linux/of.h>
18 #include <linux/regmap.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/regulator/of_regulator.h>
23 #include <linux/mfd/samsung/core.h>
24 #include <linux/mfd/samsung/s2mpa01.h>
25
26 #define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)
27
28 struct s2mpa01_info {
29 int ramp_delay24;
30 int ramp_delay3;
31 int ramp_delay5;
32 int ramp_delay16;
33 int ramp_delay7;
34 int ramp_delay8910;
35 };
36
37 static int get_ramp_delay(int ramp_delay)
38 {
39 unsigned char cnt = 0;
40
41 ramp_delay /= 6250;
42
43 while (true) {
44 ramp_delay = ramp_delay >> 1;
45 if (ramp_delay == 0)
46 break;
47 cnt++;
48 }
49
50 if (cnt > 3)
51 cnt = 3;
52
53 return cnt;
54 }
55
56 static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
57 unsigned int old_selector,
58 unsigned int new_selector)
59 {
60 struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
61 unsigned int ramp_delay = 0;
62 int old_volt, new_volt;
63
64 switch (rdev->desc->id) {
65 case S2MPA01_BUCK2:
66 case S2MPA01_BUCK4:
67 ramp_delay = s2mpa01->ramp_delay24;
68 break;
69 case S2MPA01_BUCK3:
70 ramp_delay = s2mpa01->ramp_delay3;
71 break;
72 case S2MPA01_BUCK5:
73 ramp_delay = s2mpa01->ramp_delay5;
74 break;
75 case S2MPA01_BUCK1:
76 case S2MPA01_BUCK6:
77 ramp_delay = s2mpa01->ramp_delay16;
78 break;
79 case S2MPA01_BUCK7:
80 ramp_delay = s2mpa01->ramp_delay7;
81 break;
82 case S2MPA01_BUCK8:
83 case S2MPA01_BUCK9:
84 case S2MPA01_BUCK10:
85 ramp_delay = s2mpa01->ramp_delay8910;
86 break;
87 }
88
89 if (ramp_delay == 0)
90 ramp_delay = rdev->desc->ramp_delay;
91
92 old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
93 new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
94
95 return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
96 }
97
98 static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
99 {
100 struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
101 unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
102 unsigned int ramp_enable = 1, enable_shift = 0;
103 int ret;
104
105 switch (rdev->desc->id) {
106 case S2MPA01_BUCK1:
107 enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
108 if (!ramp_delay) {
109 ramp_enable = 0;
110 break;
111 }
112
113 if (ramp_delay > s2mpa01->ramp_delay16)
114 s2mpa01->ramp_delay16 = ramp_delay;
115 else
116 ramp_delay = s2mpa01->ramp_delay16;
117
118 ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
119 ramp_reg = S2MPA01_REG_RAMP1;
120 break;
121 case S2MPA01_BUCK2:
122 enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
123 if (!ramp_delay) {
124 ramp_enable = 0;
125 break;
126 }
127
128 if (ramp_delay > s2mpa01->ramp_delay24)
129 s2mpa01->ramp_delay24 = ramp_delay;
130 else
131 ramp_delay = s2mpa01->ramp_delay24;
132
133 ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
134 ramp_reg = S2MPA01_REG_RAMP1;
135 break;
136 case S2MPA01_BUCK3:
137 enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
138 if (!ramp_delay) {
139 ramp_enable = 0;
140 break;
141 }
142
143 s2mpa01->ramp_delay3 = ramp_delay;
144 ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
145 ramp_reg = S2MPA01_REG_RAMP1;
146 break;
147 case S2MPA01_BUCK4:
148 enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
149 if (!ramp_delay) {
150 ramp_enable = 0;
151 break;
152 }
153
154 if (ramp_delay > s2mpa01->ramp_delay24)
155 s2mpa01->ramp_delay24 = ramp_delay;
156 else
157 ramp_delay = s2mpa01->ramp_delay24;
158
159 ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
160 ramp_reg = S2MPA01_REG_RAMP1;
161 break;
162 case S2MPA01_BUCK5:
163 s2mpa01->ramp_delay5 = ramp_delay;
164 ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
165 break;
166 case S2MPA01_BUCK6:
167 if (ramp_delay > s2mpa01->ramp_delay16)
168 s2mpa01->ramp_delay16 = ramp_delay;
169 else
170 ramp_delay = s2mpa01->ramp_delay16;
171
172 ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
173 break;
174 case S2MPA01_BUCK7:
175 s2mpa01->ramp_delay7 = ramp_delay;
176 ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
177 break;
178 case S2MPA01_BUCK8:
179 case S2MPA01_BUCK9:
180 case S2MPA01_BUCK10:
181 if (ramp_delay > s2mpa01->ramp_delay8910)
182 s2mpa01->ramp_delay8910 = ramp_delay;
183 else
184 ramp_delay = s2mpa01->ramp_delay8910;
185
186 ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
187 break;
188 default:
189 return 0;
190 }
191
192 if (!ramp_enable)
193 goto ramp_disable;
194
195 if (enable_shift) {
196 ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
197 1 << enable_shift, 1 << enable_shift);
198 if (ret) {
199 dev_err(&rdev->dev, "failed to enable ramp rate\n");
200 return ret;
201 }
202 }
203
204 ramp_val = get_ramp_delay(ramp_delay);
205
206 return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
207 ramp_val << ramp_shift);
208
209 ramp_disable:
210 return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
211 1 << enable_shift, 0);
212 }
213
214 static struct regulator_ops s2mpa01_ldo_ops = {
215 .list_voltage = regulator_list_voltage_linear,
216 .map_voltage = regulator_map_voltage_linear,
217 .is_enabled = regulator_is_enabled_regmap,
218 .enable = regulator_enable_regmap,
219 .disable = regulator_disable_regmap,
220 .get_voltage_sel = regulator_get_voltage_sel_regmap,
221 .set_voltage_sel = regulator_set_voltage_sel_regmap,
222 .set_voltage_time_sel = regulator_set_voltage_time_sel,
223 };
224
225 static struct regulator_ops s2mpa01_buck_ops = {
226 .list_voltage = regulator_list_voltage_linear,
227 .map_voltage = regulator_map_voltage_linear,
228 .is_enabled = regulator_is_enabled_regmap,
229 .enable = regulator_enable_regmap,
230 .disable = regulator_disable_regmap,
231 .get_voltage_sel = regulator_get_voltage_sel_regmap,
232 .set_voltage_sel = regulator_set_voltage_sel_regmap,
233 .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel,
234 .set_ramp_delay = s2mpa01_set_ramp_delay,
235 };
236
237 #define regulator_desc_ldo1(num) { \
238 .name = "LDO"#num, \
239 .id = S2MPA01_LDO##num, \
240 .ops = &s2mpa01_ldo_ops, \
241 .type = REGULATOR_VOLTAGE, \
242 .owner = THIS_MODULE, \
243 .min_uV = S2MPA01_LDO_MIN, \
244 .uV_step = S2MPA01_LDO_STEP1, \
245 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
246 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
247 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
248 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
249 .enable_mask = S2MPA01_ENABLE_MASK \
250 }
251 #define regulator_desc_ldo2(num) { \
252 .name = "LDO"#num, \
253 .id = S2MPA01_LDO##num, \
254 .ops = &s2mpa01_ldo_ops, \
255 .type = REGULATOR_VOLTAGE, \
256 .owner = THIS_MODULE, \
257 .min_uV = S2MPA01_LDO_MIN, \
258 .uV_step = S2MPA01_LDO_STEP2, \
259 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
260 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
261 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
262 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
263 .enable_mask = S2MPA01_ENABLE_MASK \
264 }
265
266 #define regulator_desc_buck1_4(num) { \
267 .name = "BUCK"#num, \
268 .id = S2MPA01_BUCK##num, \
269 .ops = &s2mpa01_buck_ops, \
270 .type = REGULATOR_VOLTAGE, \
271 .owner = THIS_MODULE, \
272 .min_uV = S2MPA01_BUCK_MIN1, \
273 .uV_step = S2MPA01_BUCK_STEP1, \
274 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
275 .ramp_delay = S2MPA01_RAMP_DELAY, \
276 .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
277 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
278 .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
279 .enable_mask = S2MPA01_ENABLE_MASK \
280 }
281
282 #define regulator_desc_buck5 { \
283 .name = "BUCK5", \
284 .id = S2MPA01_BUCK5, \
285 .ops = &s2mpa01_buck_ops, \
286 .type = REGULATOR_VOLTAGE, \
287 .owner = THIS_MODULE, \
288 .min_uV = S2MPA01_BUCK_MIN2, \
289 .uV_step = S2MPA01_BUCK_STEP1, \
290 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
291 .ramp_delay = S2MPA01_RAMP_DELAY, \
292 .vsel_reg = S2MPA01_REG_B5CTRL2, \
293 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
294 .enable_reg = S2MPA01_REG_B5CTRL1, \
295 .enable_mask = S2MPA01_ENABLE_MASK \
296 }
297
298 #define regulator_desc_buck6_7(num) { \
299 .name = "BUCK"#num, \
300 .id = S2MPA01_BUCK##num, \
301 .ops = &s2mpa01_buck_ops, \
302 .type = REGULATOR_VOLTAGE, \
303 .owner = THIS_MODULE, \
304 .min_uV = S2MPA01_BUCK_MIN1, \
305 .uV_step = S2MPA01_BUCK_STEP1, \
306 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
307 .ramp_delay = S2MPA01_RAMP_DELAY, \
308 .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
309 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
310 .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
311 .enable_mask = S2MPA01_ENABLE_MASK \
312 }
313
314 #define regulator_desc_buck8 { \
315 .name = "BUCK8", \
316 .id = S2MPA01_BUCK8, \
317 .ops = &s2mpa01_buck_ops, \
318 .type = REGULATOR_VOLTAGE, \
319 .owner = THIS_MODULE, \
320 .min_uV = S2MPA01_BUCK_MIN2, \
321 .uV_step = S2MPA01_BUCK_STEP2, \
322 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
323 .ramp_delay = S2MPA01_RAMP_DELAY, \
324 .vsel_reg = S2MPA01_REG_B8CTRL2, \
325 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
326 .enable_reg = S2MPA01_REG_B8CTRL1, \
327 .enable_mask = S2MPA01_ENABLE_MASK \
328 }
329
330 #define regulator_desc_buck9 { \
331 .name = "BUCK9", \
332 .id = S2MPA01_BUCK9, \
333 .ops = &s2mpa01_buck_ops, \
334 .type = REGULATOR_VOLTAGE, \
335 .owner = THIS_MODULE, \
336 .min_uV = S2MPA01_BUCK_MIN4, \
337 .uV_step = S2MPA01_BUCK_STEP2, \
338 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
339 .ramp_delay = S2MPA01_RAMP_DELAY, \
340 .vsel_reg = S2MPA01_REG_B9CTRL2, \
341 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
342 .enable_reg = S2MPA01_REG_B9CTRL1, \
343 .enable_mask = S2MPA01_ENABLE_MASK \
344 }
345
346 #define regulator_desc_buck10 { \
347 .name = "BUCK10", \
348 .id = S2MPA01_BUCK10, \
349 .ops = &s2mpa01_buck_ops, \
350 .type = REGULATOR_VOLTAGE, \
351 .owner = THIS_MODULE, \
352 .min_uV = S2MPA01_BUCK_MIN3, \
353 .uV_step = S2MPA01_BUCK_STEP2, \
354 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
355 .ramp_delay = S2MPA01_RAMP_DELAY, \
356 .vsel_reg = S2MPA01_REG_B10CTRL2, \
357 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
358 .enable_reg = S2MPA01_REG_B10CTRL1, \
359 .enable_mask = S2MPA01_ENABLE_MASK \
360 }
361
362 static struct regulator_desc regulators[] = {
363 regulator_desc_ldo2(1),
364 regulator_desc_ldo1(2),
365 regulator_desc_ldo1(3),
366 regulator_desc_ldo1(4),
367 regulator_desc_ldo1(5),
368 regulator_desc_ldo2(6),
369 regulator_desc_ldo1(7),
370 regulator_desc_ldo1(8),
371 regulator_desc_ldo1(9),
372 regulator_desc_ldo1(10),
373 regulator_desc_ldo2(11),
374 regulator_desc_ldo1(12),
375 regulator_desc_ldo1(13),
376 regulator_desc_ldo1(14),
377 regulator_desc_ldo1(15),
378 regulator_desc_ldo1(16),
379 regulator_desc_ldo1(17),
380 regulator_desc_ldo1(18),
381 regulator_desc_ldo1(19),
382 regulator_desc_ldo1(20),
383 regulator_desc_ldo1(21),
384 regulator_desc_ldo2(22),
385 regulator_desc_ldo2(23),
386 regulator_desc_ldo1(24),
387 regulator_desc_ldo1(25),
388 regulator_desc_ldo1(26),
389 regulator_desc_buck1_4(1),
390 regulator_desc_buck1_4(2),
391 regulator_desc_buck1_4(3),
392 regulator_desc_buck1_4(4),
393 regulator_desc_buck5,
394 regulator_desc_buck6_7(6),
395 regulator_desc_buck6_7(7),
396 regulator_desc_buck8,
397 regulator_desc_buck9,
398 regulator_desc_buck10,
399 };
400
401 static int s2mpa01_pmic_probe(struct platform_device *pdev)
402 {
403 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
404 struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
405 struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
406 struct device_node *reg_np = NULL;
407 struct regulator_config config = { };
408 struct s2mpa01_info *s2mpa01;
409 int i;
410
411 s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
412 if (!s2mpa01)
413 return -ENOMEM;
414
415 for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
416 rdata[i].name = regulators[i].name;
417
418 if (iodev->dev->of_node) {
419 reg_np = of_get_child_by_name(iodev->dev->of_node,
420 "regulators");
421 if (!reg_np) {
422 dev_err(&pdev->dev,
423 "could not find regulators sub-node\n");
424 return -EINVAL;
425 }
426
427 of_regulator_match(&pdev->dev, reg_np, rdata,
428 S2MPA01_REGULATOR_MAX);
429 of_node_put(reg_np);
430 }
431
432 platform_set_drvdata(pdev, s2mpa01);
433
434 config.dev = &pdev->dev;
435 config.regmap = iodev->regmap_pmic;
436 config.driver_data = s2mpa01;
437
438 for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
439 struct regulator_dev *rdev;
440 if (pdata)
441 config.init_data = pdata->regulators[i].initdata;
442 else
443 config.init_data = rdata[i].init_data;
444
445 if (reg_np)
446 config.of_node = rdata[i].of_node;
447
448 rdev = devm_regulator_register(&pdev->dev,
449 &regulators[i], &config);
450 if (IS_ERR(rdev)) {
451 dev_err(&pdev->dev, "regulator init failed for %d\n",
452 i);
453 return PTR_ERR(rdev);
454 }
455 }
456
457 return 0;
458 }
459
460 static const struct platform_device_id s2mpa01_pmic_id[] = {
461 { "s2mpa01-pmic", 0},
462 { },
463 };
464 MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
465
466 static struct platform_driver s2mpa01_pmic_driver = {
467 .driver = {
468 .name = "s2mpa01-pmic",
469 .owner = THIS_MODULE,
470 },
471 .probe = s2mpa01_pmic_probe,
472 .id_table = s2mpa01_pmic_id,
473 };
474
475 module_platform_driver(s2mpa01_pmic_driver);
476
477 /* Module information */
478 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
479 MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
480 MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
481 MODULE_LICENSE("GPL");
Linux with added FPC-III support