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gerrit-public.fairphone.software / kernel / msm-4.19 / e3fb7d4cc0ef05e9894e717dedb154edb1021b1a / . / drivers / regulator / s2mpa01.c
blob: f19a30f0fb42d8928735c2fd319b5ad45490b341 [file] [log] [blame]
Sachin Kamatf1879272014-03-14 17:21:58 +0530[diff] [blame]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
28struct 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
37static 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
56static 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
98static 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
Axel Linf7b1a8d2014-03-21 16:15:20 +0800[diff] [blame]195 ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
196 1 << enable_shift, 1 << enable_shift);
197 if (ret) {
198 dev_err(&rdev->dev, "failed to enable ramp rate\n");
199 return ret;
Sachin Kamatf1879272014-03-14 17:21:58 +0530[diff] [blame]200 }
201
202 ramp_val = get_ramp_delay(ramp_delay);
203
204 return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
205 ramp_val << ramp_shift);
206
207ramp_disable:
208 return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
209 1 << enable_shift, 0);
210}
211
212static struct regulator_ops s2mpa01_ldo_ops = {
213 .list_voltage = regulator_list_voltage_linear,
214 .map_voltage = regulator_map_voltage_linear,
215 .is_enabled = regulator_is_enabled_regmap,
216 .enable = regulator_enable_regmap,
217 .disable = regulator_disable_regmap,
218 .get_voltage_sel = regulator_get_voltage_sel_regmap,
219 .set_voltage_sel = regulator_set_voltage_sel_regmap,
220 .set_voltage_time_sel = regulator_set_voltage_time_sel,
221};
222
223static struct regulator_ops s2mpa01_buck_ops = {
224 .list_voltage = regulator_list_voltage_linear,
225 .map_voltage = regulator_map_voltage_linear,
226 .is_enabled = regulator_is_enabled_regmap,
227 .enable = regulator_enable_regmap,
228 .disable = regulator_disable_regmap,
229 .get_voltage_sel = regulator_get_voltage_sel_regmap,
230 .set_voltage_sel = regulator_set_voltage_sel_regmap,
231 .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel,
232 .set_ramp_delay = s2mpa01_set_ramp_delay,
233};
234
235#define regulator_desc_ldo1(num) { \
236 .name = "LDO"#num, \
237 .id = S2MPA01_LDO##num, \
238 .ops = &s2mpa01_ldo_ops, \
239 .type = REGULATOR_VOLTAGE, \
240 .owner = THIS_MODULE, \
241 .min_uV = S2MPA01_LDO_MIN, \
242 .uV_step = S2MPA01_LDO_STEP1, \
243 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
244 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
245 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
246 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
247 .enable_mask = S2MPA01_ENABLE_MASK \
248}
249#define regulator_desc_ldo2(num) { \
250 .name = "LDO"#num, \
251 .id = S2MPA01_LDO##num, \
252 .ops = &s2mpa01_ldo_ops, \
253 .type = REGULATOR_VOLTAGE, \
254 .owner = THIS_MODULE, \
255 .min_uV = S2MPA01_LDO_MIN, \
256 .uV_step = S2MPA01_LDO_STEP2, \
257 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
258 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
259 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
260 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
261 .enable_mask = S2MPA01_ENABLE_MASK \
262}
263
264#define regulator_desc_buck1_4(num) { \
265 .name = "BUCK"#num, \
266 .id = S2MPA01_BUCK##num, \
267 .ops = &s2mpa01_buck_ops, \
268 .type = REGULATOR_VOLTAGE, \
269 .owner = THIS_MODULE, \
270 .min_uV = S2MPA01_BUCK_MIN1, \
271 .uV_step = S2MPA01_BUCK_STEP1, \
272 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
273 .ramp_delay = S2MPA01_RAMP_DELAY, \
274 .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
275 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
276 .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
277 .enable_mask = S2MPA01_ENABLE_MASK \
278}
279
280#define regulator_desc_buck5 { \
281 .name = "BUCK5", \
282 .id = S2MPA01_BUCK5, \
283 .ops = &s2mpa01_buck_ops, \
284 .type = REGULATOR_VOLTAGE, \
285 .owner = THIS_MODULE, \
286 .min_uV = S2MPA01_BUCK_MIN2, \
287 .uV_step = S2MPA01_BUCK_STEP1, \
288 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
289 .ramp_delay = S2MPA01_RAMP_DELAY, \
290 .vsel_reg = S2MPA01_REG_B5CTRL2, \
291 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
292 .enable_reg = S2MPA01_REG_B5CTRL1, \
293 .enable_mask = S2MPA01_ENABLE_MASK \
294}
295
296#define regulator_desc_buck6_7(num) { \
297 .name = "BUCK"#num, \
298 .id = S2MPA01_BUCK##num, \
299 .ops = &s2mpa01_buck_ops, \
300 .type = REGULATOR_VOLTAGE, \
301 .owner = THIS_MODULE, \
302 .min_uV = S2MPA01_BUCK_MIN1, \
303 .uV_step = S2MPA01_BUCK_STEP1, \
304 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
305 .ramp_delay = S2MPA01_RAMP_DELAY, \
306 .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
307 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
308 .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
309 .enable_mask = S2MPA01_ENABLE_MASK \
310}
311
312#define regulator_desc_buck8 { \
313 .name = "BUCK8", \
314 .id = S2MPA01_BUCK8, \
315 .ops = &s2mpa01_buck_ops, \
316 .type = REGULATOR_VOLTAGE, \
317 .owner = THIS_MODULE, \
318 .min_uV = S2MPA01_BUCK_MIN2, \
319 .uV_step = S2MPA01_BUCK_STEP2, \
320 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
321 .ramp_delay = S2MPA01_RAMP_DELAY, \
322 .vsel_reg = S2MPA01_REG_B8CTRL2, \
323 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
324 .enable_reg = S2MPA01_REG_B8CTRL1, \
325 .enable_mask = S2MPA01_ENABLE_MASK \
326}
327
328#define regulator_desc_buck9 { \
329 .name = "BUCK9", \
330 .id = S2MPA01_BUCK9, \
331 .ops = &s2mpa01_buck_ops, \
332 .type = REGULATOR_VOLTAGE, \
333 .owner = THIS_MODULE, \
334 .min_uV = S2MPA01_BUCK_MIN4, \
335 .uV_step = S2MPA01_BUCK_STEP2, \
336 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
337 .ramp_delay = S2MPA01_RAMP_DELAY, \
338 .vsel_reg = S2MPA01_REG_B9CTRL2, \
339 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
340 .enable_reg = S2MPA01_REG_B9CTRL1, \
341 .enable_mask = S2MPA01_ENABLE_MASK \
342}
343
344#define regulator_desc_buck10 { \
345 .name = "BUCK10", \
346 .id = S2MPA01_BUCK10, \
347 .ops = &s2mpa01_buck_ops, \
348 .type = REGULATOR_VOLTAGE, \
349 .owner = THIS_MODULE, \
350 .min_uV = S2MPA01_BUCK_MIN3, \
351 .uV_step = S2MPA01_BUCK_STEP2, \
352 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
353 .ramp_delay = S2MPA01_RAMP_DELAY, \
354 .vsel_reg = S2MPA01_REG_B10CTRL2, \
355 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
356 .enable_reg = S2MPA01_REG_B10CTRL1, \
357 .enable_mask = S2MPA01_ENABLE_MASK \
358}
359
360static struct regulator_desc regulators[] = {
361 regulator_desc_ldo2(1),
362 regulator_desc_ldo1(2),
363 regulator_desc_ldo1(3),
364 regulator_desc_ldo1(4),
365 regulator_desc_ldo1(5),
366 regulator_desc_ldo2(6),
367 regulator_desc_ldo1(7),
368 regulator_desc_ldo1(8),
369 regulator_desc_ldo1(9),
370 regulator_desc_ldo1(10),
371 regulator_desc_ldo2(11),
372 regulator_desc_ldo1(12),
373 regulator_desc_ldo1(13),
374 regulator_desc_ldo1(14),
375 regulator_desc_ldo1(15),
376 regulator_desc_ldo1(16),
377 regulator_desc_ldo1(17),
378 regulator_desc_ldo1(18),
379 regulator_desc_ldo1(19),
380 regulator_desc_ldo1(20),
381 regulator_desc_ldo1(21),
382 regulator_desc_ldo2(22),
383 regulator_desc_ldo2(23),
384 regulator_desc_ldo1(24),
385 regulator_desc_ldo1(25),
386 regulator_desc_ldo1(26),
387 regulator_desc_buck1_4(1),
388 regulator_desc_buck1_4(2),
389 regulator_desc_buck1_4(3),
390 regulator_desc_buck1_4(4),
391 regulator_desc_buck5,
392 regulator_desc_buck6_7(6),
393 regulator_desc_buck6_7(7),
394 regulator_desc_buck8,
395 regulator_desc_buck9,
396 regulator_desc_buck10,
397};
398
399static int s2mpa01_pmic_probe(struct platform_device *pdev)
400{
401 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
402 struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
403 struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
404 struct device_node *reg_np = NULL;
405 struct regulator_config config = { };
406 struct s2mpa01_info *s2mpa01;
407 int i;
408
409 s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
410 if (!s2mpa01)
411 return -ENOMEM;
412
413 for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
414 rdata[i].name = regulators[i].name;
415
416 if (iodev->dev->of_node) {
417 reg_np = of_get_child_by_name(iodev->dev->of_node,
418 "regulators");
419 if (!reg_np) {
420 dev_err(&pdev->dev,
421 "could not find regulators sub-node\n");
422 return -EINVAL;
423 }
424
425 of_regulator_match(&pdev->dev, reg_np, rdata,
426 S2MPA01_REGULATOR_MAX);
427 of_node_put(reg_np);
428 }
429
430 platform_set_drvdata(pdev, s2mpa01);
431
432 config.dev = &pdev->dev;
433 config.regmap = iodev->regmap_pmic;
434 config.driver_data = s2mpa01;
435
436 for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
437 struct regulator_dev *rdev;
438 if (pdata)
439 config.init_data = pdata->regulators[i].initdata;
440 else
441 config.init_data = rdata[i].init_data;
442
443 if (reg_np)
444 config.of_node = rdata[i].of_node;
445
446 rdev = devm_regulator_register(&pdev->dev,
447 &regulators[i], &config);
448 if (IS_ERR(rdev)) {
449 dev_err(&pdev->dev, "regulator init failed for %d\n",
450 i);
451 return PTR_ERR(rdev);
452 }
453 }
454
455 return 0;
456}
457
458static const struct platform_device_id s2mpa01_pmic_id[] = {
459 { "s2mpa01-pmic", 0},
460 { },
461};
462MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
463
464static struct platform_driver s2mpa01_pmic_driver = {
465 .driver = {
466 .name = "s2mpa01-pmic",
467 .owner = THIS_MODULE,
468 },
469 .probe = s2mpa01_pmic_probe,
470 .id_table = s2mpa01_pmic_id,
471};
472
473module_platform_driver(s2mpa01_pmic_driver);
474
475/* Module information */
476MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
477MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
478MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
479MODULE_LICENSE("GPL");