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irqchip: crossbar: Introduce centralized check for crossbar write
[linux/fpc-iii.git] / drivers / regulator / s2mps11.c
blob02e2fb2fca66fcf692d35ed0b1294274f8ce4ae5
1 /*
2 * s2mps11.c
3 *
4 * Copyright (c) 2012-2014 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 */
18
19 #include <linux/bug.h>
20 #include <linux/err.h>
21 #include <linux/gpio.h>
22 #include <linux/slab.h>
23 #include <linux/module.h>
24 #include <linux/of.h>
25 #include <linux/regmap.h>
26 #include <linux/platform_device.h>
27 #include <linux/regulator/driver.h>
28 #include <linux/regulator/machine.h>
29 #include <linux/regulator/of_regulator.h>
30 #include <linux/of_gpio.h>
31 #include <linux/mfd/samsung/core.h>
32 #include <linux/mfd/samsung/s2mps11.h>
33 #include <linux/mfd/samsung/s2mps14.h>
34
35 struct s2mps11_info {
36 unsigned int rdev_num;
37 int ramp_delay2;
38 int ramp_delay34;
39 int ramp_delay5;
40 int ramp_delay16;
41 int ramp_delay7810;
42 int ramp_delay9;
43 /*
44 * One bit for each S2MPS14 regulator whether the suspend mode
45 * was enabled.
46 */
47 unsigned int s2mps14_suspend_state:30;
48 /* Array of size rdev_num with GPIO-s for external sleep control */
49 int *ext_control_gpio;
50 };
51
52 static int get_ramp_delay(int ramp_delay)
53 {
54 unsigned char cnt = 0;
55
56 ramp_delay /= 6250;
57
58 while (true) {
59 ramp_delay = ramp_delay >> 1;
60 if (ramp_delay == 0)
61 break;
62 cnt++;
63 }
64
65 if (cnt > 3)
66 cnt = 3;
67
68 return cnt;
69 }
70
71 static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
72 unsigned int old_selector,
73 unsigned int new_selector)
74 {
75 struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
76 unsigned int ramp_delay = 0;
77 int old_volt, new_volt;
78
79 switch (rdev_get_id(rdev)) {
80 case S2MPS11_BUCK2:
81 ramp_delay = s2mps11->ramp_delay2;
82 break;
83 case S2MPS11_BUCK3:
84 case S2MPS11_BUCK4:
85 ramp_delay = s2mps11->ramp_delay34;
86 break;
87 case S2MPS11_BUCK5:
88 ramp_delay = s2mps11->ramp_delay5;
89 break;
90 case S2MPS11_BUCK6:
91 case S2MPS11_BUCK1:
92 ramp_delay = s2mps11->ramp_delay16;
93 break;
94 case S2MPS11_BUCK7:
95 case S2MPS11_BUCK8:
96 case S2MPS11_BUCK10:
97 ramp_delay = s2mps11->ramp_delay7810;
98 break;
99 case S2MPS11_BUCK9:
100 ramp_delay = s2mps11->ramp_delay9;
101 }
102
103 if (ramp_delay == 0)
104 ramp_delay = rdev->desc->ramp_delay;
105
106 old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
107 new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
108
109 return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
110 }
111
112 static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
113 {
114 struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
115 unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
116 unsigned int ramp_enable = 1, enable_shift = 0;
117 int ret;
118
119 switch (rdev_get_id(rdev)) {
120 case S2MPS11_BUCK1:
121 if (ramp_delay > s2mps11->ramp_delay16)
122 s2mps11->ramp_delay16 = ramp_delay;
123 else
124 ramp_delay = s2mps11->ramp_delay16;
125
126 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
127 break;
128 case S2MPS11_BUCK2:
129 enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
130 if (!ramp_delay) {
131 ramp_enable = 0;
132 break;
133 }
134
135 s2mps11->ramp_delay2 = ramp_delay;
136 ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
137 ramp_reg = S2MPS11_REG_RAMP;
138 break;
139 case S2MPS11_BUCK3:
140 enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
141 if (!ramp_delay) {
142 ramp_enable = 0;
143 break;
144 }
145
146 if (ramp_delay > s2mps11->ramp_delay34)
147 s2mps11->ramp_delay34 = ramp_delay;
148 else
149 ramp_delay = s2mps11->ramp_delay34;
150
151 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
152 ramp_reg = S2MPS11_REG_RAMP;
153 break;
154 case S2MPS11_BUCK4:
155 enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
156 if (!ramp_delay) {
157 ramp_enable = 0;
158 break;
159 }
160
161 if (ramp_delay > s2mps11->ramp_delay34)
162 s2mps11->ramp_delay34 = ramp_delay;
163 else
164 ramp_delay = s2mps11->ramp_delay34;
165
166 ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
167 ramp_reg = S2MPS11_REG_RAMP;
168 break;
169 case S2MPS11_BUCK5:
170 s2mps11->ramp_delay5 = ramp_delay;
171 ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
172 break;
173 case S2MPS11_BUCK6:
174 enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
175 if (!ramp_delay) {
176 ramp_enable = 0;
177 break;
178 }
179
180 if (ramp_delay > s2mps11->ramp_delay16)
181 s2mps11->ramp_delay16 = ramp_delay;
182 else
183 ramp_delay = s2mps11->ramp_delay16;
184
185 ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
186 break;
187 case S2MPS11_BUCK7:
188 case S2MPS11_BUCK8:
189 case S2MPS11_BUCK10:
190 if (ramp_delay > s2mps11->ramp_delay7810)
191 s2mps11->ramp_delay7810 = ramp_delay;
192 else
193 ramp_delay = s2mps11->ramp_delay7810;
194
195 ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
196 break;
197 case S2MPS11_BUCK9:
198 s2mps11->ramp_delay9 = ramp_delay;
199 ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
200 break;
201 default:
202 return 0;
203 }
204
205 if (!ramp_enable)
206 goto ramp_disable;
207
208 /* Ramp delay can be enabled/disabled only for buck[2346] */
209 if ((rdev_get_id(rdev) >= S2MPS11_BUCK2 &&
210 rdev_get_id(rdev) <= S2MPS11_BUCK4) ||
211 rdev_get_id(rdev) == S2MPS11_BUCK6) {
212 ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
213 1 << enable_shift, 1 << enable_shift);
214 if (ret) {
215 dev_err(&rdev->dev, "failed to enable ramp rate\n");
216 return ret;
217 }
218 }
219
220 ramp_val = get_ramp_delay(ramp_delay);
221
222 return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
223 ramp_val << ramp_shift);
224
225 ramp_disable:
226 return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
227 1 << enable_shift, 0);
228 }
229
230 static struct regulator_ops s2mps11_ldo_ops = {
231 .list_voltage = regulator_list_voltage_linear,
232 .map_voltage = regulator_map_voltage_linear,
233 .is_enabled = regulator_is_enabled_regmap,
234 .enable = regulator_enable_regmap,
235 .disable = regulator_disable_regmap,
236 .get_voltage_sel = regulator_get_voltage_sel_regmap,
237 .set_voltage_sel = regulator_set_voltage_sel_regmap,
238 .set_voltage_time_sel = regulator_set_voltage_time_sel,
239 };
240
241 static struct regulator_ops s2mps11_buck_ops = {
242 .list_voltage = regulator_list_voltage_linear,
243 .map_voltage = regulator_map_voltage_linear,
244 .is_enabled = regulator_is_enabled_regmap,
245 .enable = regulator_enable_regmap,
246 .disable = regulator_disable_regmap,
247 .get_voltage_sel = regulator_get_voltage_sel_regmap,
248 .set_voltage_sel = regulator_set_voltage_sel_regmap,
249 .set_voltage_time_sel = s2mps11_regulator_set_voltage_time_sel,
250 .set_ramp_delay = s2mps11_set_ramp_delay,
251 };
252
253 #define regulator_desc_s2mps11_ldo1(num) { \
254 .name = "LDO"#num, \
255 .id = S2MPS11_LDO##num, \
256 .ops = &s2mps11_ldo_ops, \
257 .type = REGULATOR_VOLTAGE, \
258 .owner = THIS_MODULE, \
259 .min_uV = S2MPS11_LDO_MIN, \
260 .uV_step = S2MPS11_LDO_STEP1, \
261 .n_voltages = S2MPS11_LDO_N_VOLTAGES, \
262 .vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
263 .vsel_mask = S2MPS11_LDO_VSEL_MASK, \
264 .enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
265 .enable_mask = S2MPS11_ENABLE_MASK \
266 }
267 #define regulator_desc_s2mps11_ldo2(num) { \
268 .name = "LDO"#num, \
269 .id = S2MPS11_LDO##num, \
270 .ops = &s2mps11_ldo_ops, \
271 .type = REGULATOR_VOLTAGE, \
272 .owner = THIS_MODULE, \
273 .min_uV = S2MPS11_LDO_MIN, \
274 .uV_step = S2MPS11_LDO_STEP2, \
275 .n_voltages = S2MPS11_LDO_N_VOLTAGES, \
276 .vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
277 .vsel_mask = S2MPS11_LDO_VSEL_MASK, \
278 .enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
279 .enable_mask = S2MPS11_ENABLE_MASK \
280 }
281
282 #define regulator_desc_s2mps11_buck1_4(num) { \
283 .name = "BUCK"#num, \
284 .id = S2MPS11_BUCK##num, \
285 .ops = &s2mps11_buck_ops, \
286 .type = REGULATOR_VOLTAGE, \
287 .owner = THIS_MODULE, \
288 .min_uV = S2MPS11_BUCK_MIN1, \
289 .uV_step = S2MPS11_BUCK_STEP1, \
290 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
291 .ramp_delay = S2MPS11_RAMP_DELAY, \
292 .vsel_reg = S2MPS11_REG_B1CTRL2 + (num - 1) * 2, \
293 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
294 .enable_reg = S2MPS11_REG_B1CTRL1 + (num - 1) * 2, \
295 .enable_mask = S2MPS11_ENABLE_MASK \
296 }
297
298 #define regulator_desc_s2mps11_buck5 { \
299 .name = "BUCK5", \
300 .id = S2MPS11_BUCK5, \
301 .ops = &s2mps11_buck_ops, \
302 .type = REGULATOR_VOLTAGE, \
303 .owner = THIS_MODULE, \
304 .min_uV = S2MPS11_BUCK_MIN1, \
305 .uV_step = S2MPS11_BUCK_STEP1, \
306 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
307 .ramp_delay = S2MPS11_RAMP_DELAY, \
308 .vsel_reg = S2MPS11_REG_B5CTRL2, \
309 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
310 .enable_reg = S2MPS11_REG_B5CTRL1, \
311 .enable_mask = S2MPS11_ENABLE_MASK \
312 }
313
314 #define regulator_desc_s2mps11_buck6_8(num) { \
315 .name = "BUCK"#num, \
316 .id = S2MPS11_BUCK##num, \
317 .ops = &s2mps11_buck_ops, \
318 .type = REGULATOR_VOLTAGE, \
319 .owner = THIS_MODULE, \
320 .min_uV = S2MPS11_BUCK_MIN1, \
321 .uV_step = S2MPS11_BUCK_STEP1, \
322 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
323 .ramp_delay = S2MPS11_RAMP_DELAY, \
324 .vsel_reg = S2MPS11_REG_B6CTRL2 + (num - 6) * 2, \
325 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
326 .enable_reg = S2MPS11_REG_B6CTRL1 + (num - 6) * 2, \
327 .enable_mask = S2MPS11_ENABLE_MASK \
328 }
329
330 #define regulator_desc_s2mps11_buck9 { \
331 .name = "BUCK9", \
332 .id = S2MPS11_BUCK9, \
333 .ops = &s2mps11_buck_ops, \
334 .type = REGULATOR_VOLTAGE, \
335 .owner = THIS_MODULE, \
336 .min_uV = S2MPS11_BUCK_MIN3, \
337 .uV_step = S2MPS11_BUCK_STEP3, \
338 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
339 .ramp_delay = S2MPS11_RAMP_DELAY, \
340 .vsel_reg = S2MPS11_REG_B9CTRL2, \
341 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
342 .enable_reg = S2MPS11_REG_B9CTRL1, \
343 .enable_mask = S2MPS11_ENABLE_MASK \
344 }
345
346 #define regulator_desc_s2mps11_buck10 { \
347 .name = "BUCK10", \
348 .id = S2MPS11_BUCK10, \
349 .ops = &s2mps11_buck_ops, \
350 .type = REGULATOR_VOLTAGE, \
351 .owner = THIS_MODULE, \
352 .min_uV = S2MPS11_BUCK_MIN2, \
353 .uV_step = S2MPS11_BUCK_STEP2, \
354 .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
355 .ramp_delay = S2MPS11_RAMP_DELAY, \
356 .vsel_reg = S2MPS11_REG_B10CTRL2, \
357 .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
358 .enable_reg = S2MPS11_REG_B10CTRL1, \
359 .enable_mask = S2MPS11_ENABLE_MASK \
360 }
361
362 static const struct regulator_desc s2mps11_regulators[] = {
363 regulator_desc_s2mps11_ldo2(1),
364 regulator_desc_s2mps11_ldo1(2),
365 regulator_desc_s2mps11_ldo1(3),
366 regulator_desc_s2mps11_ldo1(4),
367 regulator_desc_s2mps11_ldo1(5),
368 regulator_desc_s2mps11_ldo2(6),
369 regulator_desc_s2mps11_ldo1(7),
370 regulator_desc_s2mps11_ldo1(8),
371 regulator_desc_s2mps11_ldo1(9),
372 regulator_desc_s2mps11_ldo1(10),
373 regulator_desc_s2mps11_ldo2(11),
374 regulator_desc_s2mps11_ldo1(12),
375 regulator_desc_s2mps11_ldo1(13),
376 regulator_desc_s2mps11_ldo1(14),
377 regulator_desc_s2mps11_ldo1(15),
378 regulator_desc_s2mps11_ldo1(16),
379 regulator_desc_s2mps11_ldo1(17),
380 regulator_desc_s2mps11_ldo1(18),
381 regulator_desc_s2mps11_ldo1(19),
382 regulator_desc_s2mps11_ldo1(20),
383 regulator_desc_s2mps11_ldo1(21),
384 regulator_desc_s2mps11_ldo2(22),
385 regulator_desc_s2mps11_ldo2(23),
386 regulator_desc_s2mps11_ldo1(24),
387 regulator_desc_s2mps11_ldo1(25),
388 regulator_desc_s2mps11_ldo1(26),
389 regulator_desc_s2mps11_ldo2(27),
390 regulator_desc_s2mps11_ldo1(28),
391 regulator_desc_s2mps11_ldo1(29),
392 regulator_desc_s2mps11_ldo1(30),
393 regulator_desc_s2mps11_ldo1(31),
394 regulator_desc_s2mps11_ldo1(32),
395 regulator_desc_s2mps11_ldo1(33),
396 regulator_desc_s2mps11_ldo1(34),
397 regulator_desc_s2mps11_ldo1(35),
398 regulator_desc_s2mps11_ldo1(36),
399 regulator_desc_s2mps11_ldo1(37),
400 regulator_desc_s2mps11_ldo1(38),
401 regulator_desc_s2mps11_buck1_4(1),
402 regulator_desc_s2mps11_buck1_4(2),
403 regulator_desc_s2mps11_buck1_4(3),
404 regulator_desc_s2mps11_buck1_4(4),
405 regulator_desc_s2mps11_buck5,
406 regulator_desc_s2mps11_buck6_8(6),
407 regulator_desc_s2mps11_buck6_8(7),
408 regulator_desc_s2mps11_buck6_8(8),
409 regulator_desc_s2mps11_buck9,
410 regulator_desc_s2mps11_buck10,
411 };
412
413 static int s2mps14_regulator_enable(struct regulator_dev *rdev)
414 {
415 struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
416 unsigned int val;
417
418 if (s2mps11->s2mps14_suspend_state & (1 << rdev_get_id(rdev)))
419 val = S2MPS14_ENABLE_SUSPEND;
420 else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)]))
421 val = S2MPS14_ENABLE_EXT_CONTROL;
422 else
423 val = rdev->desc->enable_mask;
424
425 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
426 rdev->desc->enable_mask, val);
427 }
428
429 static int s2mps14_regulator_set_suspend_disable(struct regulator_dev *rdev)
430 {
431 int ret;
432 unsigned int val;
433 struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
434
435 /* LDO3 should be always on and does not support suspend mode */
436 if (rdev_get_id(rdev) == S2MPS14_LDO3)
437 return 0;
438
439 ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
440 if (ret < 0)
441 return ret;
442
443 s2mps11->s2mps14_suspend_state |= (1 << rdev_get_id(rdev));
444 /*
445 * Don't enable suspend mode if regulator is already disabled because
446 * this would effectively for a short time turn on the regulator after
447 * resuming.
448 * However we still want to toggle the suspend_state bit for regulator
449 * in case if it got enabled before suspending the system.
450 */
451 if (!(val & rdev->desc->enable_mask))
452 return 0;
453
454 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
455 rdev->desc->enable_mask, S2MPS14_ENABLE_SUSPEND);
456 }
457
458 static struct regulator_ops s2mps14_reg_ops = {
459 .list_voltage = regulator_list_voltage_linear,
460 .map_voltage = regulator_map_voltage_linear,
461 .is_enabled = regulator_is_enabled_regmap,
462 .enable = s2mps14_regulator_enable,
463 .disable = regulator_disable_regmap,
464 .get_voltage_sel = regulator_get_voltage_sel_regmap,
465 .set_voltage_sel = regulator_set_voltage_sel_regmap,
466 .set_voltage_time_sel = regulator_set_voltage_time_sel,
467 .set_suspend_disable = s2mps14_regulator_set_suspend_disable,
468 };
469
470 #define regulator_desc_s2mps14_ldo1(num) { \
471 .name = "LDO"#num, \
472 .id = S2MPS14_LDO##num, \
473 .ops = &s2mps14_reg_ops, \
474 .type = REGULATOR_VOLTAGE, \
475 .owner = THIS_MODULE, \
476 .min_uV = S2MPS14_LDO_MIN_800MV, \
477 .uV_step = S2MPS14_LDO_STEP_25MV, \
478 .n_voltages = S2MPS14_LDO_N_VOLTAGES, \
479 .vsel_reg = S2MPS14_REG_L1CTRL + num - 1, \
480 .vsel_mask = S2MPS14_LDO_VSEL_MASK, \
481 .enable_reg = S2MPS14_REG_L1CTRL + num - 1, \
482 .enable_mask = S2MPS14_ENABLE_MASK \
483 }
484 #define regulator_desc_s2mps14_ldo2(num) { \
485 .name = "LDO"#num, \
486 .id = S2MPS14_LDO##num, \
487 .ops = &s2mps14_reg_ops, \
488 .type = REGULATOR_VOLTAGE, \
489 .owner = THIS_MODULE, \
490 .min_uV = S2MPS14_LDO_MIN_1800MV, \
491 .uV_step = S2MPS14_LDO_STEP_25MV, \
492 .n_voltages = S2MPS14_LDO_N_VOLTAGES, \
493 .vsel_reg = S2MPS14_REG_L1CTRL + num - 1, \
494 .vsel_mask = S2MPS14_LDO_VSEL_MASK, \
495 .enable_reg = S2MPS14_REG_L1CTRL + num - 1, \
496 .enable_mask = S2MPS14_ENABLE_MASK \
497 }
498 #define regulator_desc_s2mps14_ldo3(num) { \
499 .name = "LDO"#num, \
500 .id = S2MPS14_LDO##num, \
501 .ops = &s2mps14_reg_ops, \
502 .type = REGULATOR_VOLTAGE, \
503 .owner = THIS_MODULE, \
504 .min_uV = S2MPS14_LDO_MIN_800MV, \
505 .uV_step = S2MPS14_LDO_STEP_12_5MV, \
506 .n_voltages = S2MPS14_LDO_N_VOLTAGES, \
507 .vsel_reg = S2MPS14_REG_L1CTRL + num - 1, \
508 .vsel_mask = S2MPS14_LDO_VSEL_MASK, \
509 .enable_reg = S2MPS14_REG_L1CTRL + num - 1, \
510 .enable_mask = S2MPS14_ENABLE_MASK \
511 }
512 #define regulator_desc_s2mps14_buck1235(num) { \
513 .name = "BUCK"#num, \
514 .id = S2MPS14_BUCK##num, \
515 .ops = &s2mps14_reg_ops, \
516 .type = REGULATOR_VOLTAGE, \
517 .owner = THIS_MODULE, \
518 .min_uV = S2MPS14_BUCK1235_MIN_600MV, \
519 .uV_step = S2MPS14_BUCK1235_STEP_6_25MV, \
520 .n_voltages = S2MPS14_BUCK_N_VOLTAGES, \
521 .linear_min_sel = S2MPS14_BUCK1235_START_SEL, \
522 .ramp_delay = S2MPS14_BUCK_RAMP_DELAY, \
523 .vsel_reg = S2MPS14_REG_B1CTRL2 + (num - 1) * 2, \
524 .vsel_mask = S2MPS14_BUCK_VSEL_MASK, \
525 .enable_reg = S2MPS14_REG_B1CTRL1 + (num - 1) * 2, \
526 .enable_mask = S2MPS14_ENABLE_MASK \
527 }
528 #define regulator_desc_s2mps14_buck4(num) { \
529 .name = "BUCK"#num, \
530 .id = S2MPS14_BUCK##num, \
531 .ops = &s2mps14_reg_ops, \
532 .type = REGULATOR_VOLTAGE, \
533 .owner = THIS_MODULE, \
534 .min_uV = S2MPS14_BUCK4_MIN_1400MV, \
535 .uV_step = S2MPS14_BUCK4_STEP_12_5MV, \
536 .n_voltages = S2MPS14_BUCK_N_VOLTAGES, \
537 .linear_min_sel = S2MPS14_BUCK4_START_SEL, \
538 .ramp_delay = S2MPS14_BUCK_RAMP_DELAY, \
539 .vsel_reg = S2MPS14_REG_B1CTRL2 + (num - 1) * 2, \
540 .vsel_mask = S2MPS14_BUCK_VSEL_MASK, \
541 .enable_reg = S2MPS14_REG_B1CTRL1 + (num - 1) * 2, \
542 .enable_mask = S2MPS14_ENABLE_MASK \
543 }
544
545 static const struct regulator_desc s2mps14_regulators[] = {
546 regulator_desc_s2mps14_ldo3(1),
547 regulator_desc_s2mps14_ldo3(2),
548 regulator_desc_s2mps14_ldo1(3),
549 regulator_desc_s2mps14_ldo1(4),
550 regulator_desc_s2mps14_ldo3(5),
551 regulator_desc_s2mps14_ldo3(6),
552 regulator_desc_s2mps14_ldo1(7),
553 regulator_desc_s2mps14_ldo2(8),
554 regulator_desc_s2mps14_ldo3(9),
555 regulator_desc_s2mps14_ldo3(10),
556 regulator_desc_s2mps14_ldo1(11),
557 regulator_desc_s2mps14_ldo2(12),
558 regulator_desc_s2mps14_ldo2(13),
559 regulator_desc_s2mps14_ldo2(14),
560 regulator_desc_s2mps14_ldo2(15),
561 regulator_desc_s2mps14_ldo2(16),
562 regulator_desc_s2mps14_ldo2(17),
563 regulator_desc_s2mps14_ldo2(18),
564 regulator_desc_s2mps14_ldo1(19),
565 regulator_desc_s2mps14_ldo1(20),
566 regulator_desc_s2mps14_ldo1(21),
567 regulator_desc_s2mps14_ldo3(22),
568 regulator_desc_s2mps14_ldo1(23),
569 regulator_desc_s2mps14_ldo2(24),
570 regulator_desc_s2mps14_ldo2(25),
571 regulator_desc_s2mps14_buck1235(1),
572 regulator_desc_s2mps14_buck1235(2),
573 regulator_desc_s2mps14_buck1235(3),
574 regulator_desc_s2mps14_buck4(4),
575 regulator_desc_s2mps14_buck1235(5),
576 };
577
578 static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
579 struct regulator_dev *rdev)
580 {
581 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
582 rdev->desc->enable_mask, S2MPS14_ENABLE_EXT_CONTROL);
583 }
584
585 static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
586 struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)
587 {
588 int *gpio = s2mps11->ext_control_gpio;
589 unsigned int i;
590 unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11,
591 S2MPS14_LDO12 };
592
593 for (i = 0; i < ARRAY_SIZE(valid_regulators); i++) {
594 unsigned int reg = valid_regulators[i];
595
596 if (!rdata[reg].init_data || !rdata[reg].of_node)
597 continue;
598
599 gpio[reg] = of_get_named_gpio(rdata[reg].of_node,
600 "samsung,ext-control-gpios", 0);
601 if (gpio_is_valid(gpio[reg]))
602 dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n",
603 gpio[reg], reg, rdata[reg].name);
604 }
605 }
606
607 static int s2mps11_pmic_dt_parse(struct platform_device *pdev,
608 struct of_regulator_match *rdata, struct s2mps11_info *s2mps11,
609 enum sec_device_type dev_type)
610 {
611 struct device_node *reg_np;
612
613 reg_np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
614 if (!reg_np) {
615 dev_err(&pdev->dev, "could not find regulators sub-node\n");
616 return -EINVAL;
617 }
618
619 of_regulator_match(&pdev->dev, reg_np, rdata, s2mps11->rdev_num);
620 if (dev_type == S2MPS14X)
621 s2mps14_pmic_dt_parse_ext_control_gpio(pdev, rdata, s2mps11);
622
623 of_node_put(reg_np);
624
625 return 0;
626 }
627
628 static int s2mps11_pmic_probe(struct platform_device *pdev)
629 {
630 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
631 struct sec_platform_data *pdata = NULL;
632 struct of_regulator_match *rdata = NULL;
633 struct regulator_config config = { };
634 struct s2mps11_info *s2mps11;
635 int i, ret = 0;
636 const struct regulator_desc *regulators;
637 enum sec_device_type dev_type;
638
639 s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
640 GFP_KERNEL);
641 if (!s2mps11)
642 return -ENOMEM;
643
644 dev_type = platform_get_device_id(pdev)->driver_data;
645 switch (dev_type) {
646 case S2MPS11X:
647 s2mps11->rdev_num = ARRAY_SIZE(s2mps11_regulators);
648 regulators = s2mps11_regulators;
649 break;
650 case S2MPS14X:
651 s2mps11->rdev_num = ARRAY_SIZE(s2mps14_regulators);
652 regulators = s2mps14_regulators;
653 break;
654 default:
655 dev_err(&pdev->dev, "Invalid device type: %u\n", dev_type);
656 return -EINVAL;
657 };
658
659 s2mps11->ext_control_gpio = devm_kzalloc(&pdev->dev,
660 sizeof(*s2mps11->ext_control_gpio) * s2mps11->rdev_num,
661 GFP_KERNEL);
662 if (!s2mps11->ext_control_gpio)
663 return -ENOMEM;
664 /*
665 * 0 is a valid GPIO so initialize all GPIO-s to negative value
666 * to indicate that external control won't be used for this regulator.
667 */
668 for (i = 0; i < s2mps11->rdev_num; i++)
669 s2mps11->ext_control_gpio[i] = -EINVAL;
670
671 if (!iodev->dev->of_node) {
672 if (iodev->pdata) {
673 pdata = iodev->pdata;
674 goto common_reg;
675 } else {
676 dev_err(pdev->dev.parent,
677 "Platform data or DT node not supplied\n");
678 return -ENODEV;
679 }
680 }
681
682 rdata = kzalloc(sizeof(*rdata) * s2mps11->rdev_num, GFP_KERNEL);
683 if (!rdata)
684 return -ENOMEM;
685
686 for (i = 0; i < s2mps11->rdev_num; i++)
687 rdata[i].name = regulators[i].name;
688
689 ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11, dev_type);
690 if (ret)
691 goto out;
692
693 common_reg:
694 platform_set_drvdata(pdev, s2mps11);
695
696 config.dev = &pdev->dev;
697 config.regmap = iodev->regmap_pmic;
698 config.driver_data = s2mps11;
699 config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
700 for (i = 0; i < s2mps11->rdev_num; i++) {
701 struct regulator_dev *regulator;
702
703 if (pdata) {
704 config.init_data = pdata->regulators[i].initdata;
705 config.of_node = pdata->regulators[i].reg_node;
706 } else {
707 config.init_data = rdata[i].init_data;
708 config.of_node = rdata[i].of_node;
709 }
710 config.ena_gpio = s2mps11->ext_control_gpio[i];
711
712 regulator = devm_regulator_register(&pdev->dev,
713 &regulators[i], &config);
714 if (IS_ERR(regulator)) {
715 ret = PTR_ERR(regulator);
716 dev_err(&pdev->dev, "regulator init failed for %d\n",
717 i);
718 goto out;
719 }
720
721 if (gpio_is_valid(s2mps11->ext_control_gpio[i])) {
722 ret = s2mps14_pmic_enable_ext_control(s2mps11,
723 regulator);
724 if (ret < 0) {
725 dev_err(&pdev->dev,
726 "failed to enable GPIO control over %s: %d\n",
727 regulator->desc->name, ret);
728 goto out;
729 }
730 }
731 }
732
733 out:
734 kfree(rdata);
735
736 return ret;
737 }
738
739 static const struct platform_device_id s2mps11_pmic_id[] = {
740 { "s2mps11-pmic", S2MPS11X},
741 { "s2mps14-pmic", S2MPS14X},
742 { },
743 };
744 MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
745
746 static struct platform_driver s2mps11_pmic_driver = {
747 .driver = {
748 .name = "s2mps11-pmic",
749 .owner = THIS_MODULE,
750 },
751 .probe = s2mps11_pmic_probe,
752 .id_table = s2mps11_pmic_id,
753 };
754
755 static int __init s2mps11_pmic_init(void)
756 {
757 return platform_driver_register(&s2mps11_pmic_driver);
758 }
759 subsys_initcall(s2mps11_pmic_init);
760
761 static void __exit s2mps11_pmic_exit(void)
762 {
763 platform_driver_unregister(&s2mps11_pmic_driver);
764 }
765 module_exit(s2mps11_pmic_exit);
766
767 /* Module information */
768 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
769 MODULE_DESCRIPTION("SAMSUNG S2MPS11/S2MPS14 Regulator Driver");
770 MODULE_LICENSE("GPL");
Linux with added FPC-III support