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f1879271 SK |
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 { | |
33f0698a | 29 | struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX]; |
f1879271 SK |
30 | int ramp_delay24; |
31 | int ramp_delay3; | |
32 | int ramp_delay5; | |
33 | int ramp_delay16; | |
34 | int ramp_delay7; | |
35 | int ramp_delay8910; | |
36 | }; | |
37 | ||
38 | static int get_ramp_delay(int ramp_delay) | |
39 | { | |
40 | unsigned char cnt = 0; | |
41 | ||
42 | ramp_delay /= 6250; | |
43 | ||
44 | while (true) { | |
45 | ramp_delay = ramp_delay >> 1; | |
46 | if (ramp_delay == 0) | |
47 | break; | |
48 | cnt++; | |
49 | } | |
50 | ||
51 | if (cnt > 3) | |
52 | cnt = 3; | |
53 | ||
54 | return cnt; | |
55 | } | |
56 | ||
57 | static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev, | |
58 | unsigned int old_selector, | |
59 | unsigned int new_selector) | |
60 | { | |
61 | struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); | |
62 | unsigned int ramp_delay = 0; | |
63 | int old_volt, new_volt; | |
64 | ||
0608032a | 65 | switch (rdev_get_id(rdev)) { |
f1879271 SK |
66 | case S2MPA01_BUCK2: |
67 | case S2MPA01_BUCK4: | |
68 | ramp_delay = s2mpa01->ramp_delay24; | |
69 | break; | |
70 | case S2MPA01_BUCK3: | |
71 | ramp_delay = s2mpa01->ramp_delay3; | |
72 | break; | |
73 | case S2MPA01_BUCK5: | |
74 | ramp_delay = s2mpa01->ramp_delay5; | |
75 | break; | |
76 | case S2MPA01_BUCK1: | |
77 | case S2MPA01_BUCK6: | |
78 | ramp_delay = s2mpa01->ramp_delay16; | |
79 | break; | |
80 | case S2MPA01_BUCK7: | |
81 | ramp_delay = s2mpa01->ramp_delay7; | |
82 | break; | |
83 | case S2MPA01_BUCK8: | |
84 | case S2MPA01_BUCK9: | |
85 | case S2MPA01_BUCK10: | |
86 | ramp_delay = s2mpa01->ramp_delay8910; | |
87 | break; | |
88 | } | |
89 | ||
90 | if (ramp_delay == 0) | |
91 | ramp_delay = rdev->desc->ramp_delay; | |
92 | ||
93 | old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector); | |
94 | new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector); | |
95 | ||
96 | return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); | |
97 | } | |
98 | ||
99 | static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) | |
100 | { | |
101 | struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); | |
102 | unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2; | |
103 | unsigned int ramp_enable = 1, enable_shift = 0; | |
104 | int ret; | |
105 | ||
0608032a | 106 | switch (rdev_get_id(rdev)) { |
f1879271 SK |
107 | case S2MPA01_BUCK1: |
108 | enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT; | |
109 | if (!ramp_delay) { | |
110 | ramp_enable = 0; | |
111 | break; | |
112 | } | |
113 | ||
114 | if (ramp_delay > s2mpa01->ramp_delay16) | |
115 | s2mpa01->ramp_delay16 = ramp_delay; | |
116 | else | |
117 | ramp_delay = s2mpa01->ramp_delay16; | |
118 | ||
119 | ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; | |
f1879271 SK |
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 | ||
51e2fc0a KK |
195 | /* Ramp delay can be enabled/disabled only for buck[1234] */ |
196 | if (rdev_get_id(rdev) >= S2MPA01_BUCK1 && | |
197 | rdev_get_id(rdev) <= S2MPA01_BUCK4) { | |
198 | ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, | |
199 | 1 << enable_shift, 1 << enable_shift); | |
200 | if (ret) { | |
201 | dev_err(&rdev->dev, "failed to enable ramp rate\n"); | |
202 | return ret; | |
203 | } | |
f1879271 SK |
204 | } |
205 | ||
206 | ramp_val = get_ramp_delay(ramp_delay); | |
207 | ||
208 | return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift, | |
209 | ramp_val << ramp_shift); | |
210 | ||
211 | ramp_disable: | |
212 | return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, | |
213 | 1 << enable_shift, 0); | |
214 | } | |
215 | ||
f465bf9b | 216 | static const struct regulator_ops s2mpa01_ldo_ops = { |
f1879271 SK |
217 | .list_voltage = regulator_list_voltage_linear, |
218 | .map_voltage = regulator_map_voltage_linear, | |
219 | .is_enabled = regulator_is_enabled_regmap, | |
220 | .enable = regulator_enable_regmap, | |
221 | .disable = regulator_disable_regmap, | |
222 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
223 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
224 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
225 | }; | |
226 | ||
f465bf9b | 227 | static const struct regulator_ops s2mpa01_buck_ops = { |
f1879271 SK |
228 | .list_voltage = regulator_list_voltage_linear, |
229 | .map_voltage = regulator_map_voltage_linear, | |
230 | .is_enabled = regulator_is_enabled_regmap, | |
231 | .enable = regulator_enable_regmap, | |
232 | .disable = regulator_disable_regmap, | |
233 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
234 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
235 | .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel, | |
236 | .set_ramp_delay = s2mpa01_set_ramp_delay, | |
237 | }; | |
238 | ||
d264fd45 | 239 | #define regulator_desc_ldo(num, step) { \ |
f1879271 SK |
240 | .name = "LDO"#num, \ |
241 | .id = S2MPA01_LDO##num, \ | |
242 | .ops = &s2mpa01_ldo_ops, \ | |
243 | .type = REGULATOR_VOLTAGE, \ | |
244 | .owner = THIS_MODULE, \ | |
0e4f4178 | 245 | .min_uV = MIN_800_MV, \ |
d264fd45 | 246 | .uV_step = step, \ |
f1879271 SK |
247 | .n_voltages = S2MPA01_LDO_N_VOLTAGES, \ |
248 | .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \ | |
249 | .vsel_mask = S2MPA01_LDO_VSEL_MASK, \ | |
250 | .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \ | |
251 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
252 | } | |
253 | ||
254 | #define regulator_desc_buck1_4(num) { \ | |
255 | .name = "BUCK"#num, \ | |
256 | .id = S2MPA01_BUCK##num, \ | |
257 | .ops = &s2mpa01_buck_ops, \ | |
258 | .type = REGULATOR_VOLTAGE, \ | |
259 | .owner = THIS_MODULE, \ | |
0e4f4178 ADK |
260 | .min_uV = MIN_600_MV, \ |
261 | .uV_step = STEP_6_25_MV, \ | |
f1879271 SK |
262 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
263 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
264 | .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \ | |
265 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
266 | .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \ | |
267 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
268 | } | |
269 | ||
270 | #define regulator_desc_buck5 { \ | |
271 | .name = "BUCK5", \ | |
272 | .id = S2MPA01_BUCK5, \ | |
273 | .ops = &s2mpa01_buck_ops, \ | |
274 | .type = REGULATOR_VOLTAGE, \ | |
275 | .owner = THIS_MODULE, \ | |
0e4f4178 ADK |
276 | .min_uV = MIN_800_MV, \ |
277 | .uV_step = STEP_6_25_MV, \ | |
f1879271 SK |
278 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
279 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
280 | .vsel_reg = S2MPA01_REG_B5CTRL2, \ | |
281 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
282 | .enable_reg = S2MPA01_REG_B5CTRL1, \ | |
283 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
284 | } | |
285 | ||
d264fd45 | 286 | #define regulator_desc_buck6_10(num, min, step) { \ |
f1879271 SK |
287 | .name = "BUCK"#num, \ |
288 | .id = S2MPA01_BUCK##num, \ | |
289 | .ops = &s2mpa01_buck_ops, \ | |
290 | .type = REGULATOR_VOLTAGE, \ | |
291 | .owner = THIS_MODULE, \ | |
d264fd45 ADK |
292 | .min_uV = min, \ |
293 | .uV_step = step, \ | |
f1879271 SK |
294 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
295 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
296 | .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \ | |
297 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
298 | .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \ | |
299 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
300 | } | |
301 | ||
4b8e43f2 | 302 | static const struct regulator_desc regulators[] = { |
d264fd45 ADK |
303 | regulator_desc_ldo(1, STEP_25_MV), |
304 | regulator_desc_ldo(2, STEP_50_MV), | |
305 | regulator_desc_ldo(3, STEP_50_MV), | |
306 | regulator_desc_ldo(4, STEP_50_MV), | |
307 | regulator_desc_ldo(5, STEP_50_MV), | |
308 | regulator_desc_ldo(6, STEP_25_MV), | |
309 | regulator_desc_ldo(7, STEP_50_MV), | |
310 | regulator_desc_ldo(8, STEP_50_MV), | |
311 | regulator_desc_ldo(9, STEP_50_MV), | |
312 | regulator_desc_ldo(10, STEP_50_MV), | |
313 | regulator_desc_ldo(11, STEP_25_MV), | |
314 | regulator_desc_ldo(12, STEP_50_MV), | |
315 | regulator_desc_ldo(13, STEP_50_MV), | |
316 | regulator_desc_ldo(14, STEP_50_MV), | |
317 | regulator_desc_ldo(15, STEP_50_MV), | |
318 | regulator_desc_ldo(16, STEP_50_MV), | |
319 | regulator_desc_ldo(17, STEP_50_MV), | |
320 | regulator_desc_ldo(18, STEP_50_MV), | |
321 | regulator_desc_ldo(19, STEP_50_MV), | |
322 | regulator_desc_ldo(20, STEP_50_MV), | |
323 | regulator_desc_ldo(21, STEP_50_MV), | |
324 | regulator_desc_ldo(22, STEP_25_MV), | |
325 | regulator_desc_ldo(23, STEP_25_MV), | |
326 | regulator_desc_ldo(24, STEP_50_MV), | |
327 | regulator_desc_ldo(25, STEP_50_MV), | |
328 | regulator_desc_ldo(26, STEP_50_MV), | |
f1879271 SK |
329 | regulator_desc_buck1_4(1), |
330 | regulator_desc_buck1_4(2), | |
331 | regulator_desc_buck1_4(3), | |
332 | regulator_desc_buck1_4(4), | |
333 | regulator_desc_buck5, | |
d264fd45 ADK |
334 | regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV), |
335 | regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV), | |
336 | regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV), | |
337 | regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV), | |
338 | regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV), | |
f1879271 SK |
339 | }; |
340 | ||
341 | static int s2mpa01_pmic_probe(struct platform_device *pdev) | |
342 | { | |
343 | struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
344 | struct sec_platform_data *pdata = dev_get_platdata(iodev->dev); | |
f1879271 SK |
345 | struct device_node *reg_np = NULL; |
346 | struct regulator_config config = { }; | |
33f0698a | 347 | struct of_regulator_match *rdata; |
f1879271 SK |
348 | struct s2mpa01_info *s2mpa01; |
349 | int i; | |
350 | ||
351 | s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL); | |
352 | if (!s2mpa01) | |
353 | return -ENOMEM; | |
354 | ||
33f0698a | 355 | rdata = s2mpa01->rdata; |
f1879271 SK |
356 | for (i = 0; i < S2MPA01_REGULATOR_CNT; i++) |
357 | rdata[i].name = regulators[i].name; | |
358 | ||
359 | if (iodev->dev->of_node) { | |
360 | reg_np = of_get_child_by_name(iodev->dev->of_node, | |
361 | "regulators"); | |
5339c34f KK |
362 | if (!reg_np) { |
363 | dev_err(&pdev->dev, | |
364 | "could not find regulators sub-node\n"); | |
365 | return -EINVAL; | |
366 | } | |
f1879271 SK |
367 | |
368 | of_regulator_match(&pdev->dev, reg_np, rdata, | |
369 | S2MPA01_REGULATOR_MAX); | |
370 | of_node_put(reg_np); | |
371 | } | |
372 | ||
373 | platform_set_drvdata(pdev, s2mpa01); | |
374 | ||
375 | config.dev = &pdev->dev; | |
376 | config.regmap = iodev->regmap_pmic; | |
377 | config.driver_data = s2mpa01; | |
378 | ||
379 | for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) { | |
380 | struct regulator_dev *rdev; | |
381 | if (pdata) | |
382 | config.init_data = pdata->regulators[i].initdata; | |
383 | else | |
384 | config.init_data = rdata[i].init_data; | |
385 | ||
386 | if (reg_np) | |
387 | config.of_node = rdata[i].of_node; | |
388 | ||
389 | rdev = devm_regulator_register(&pdev->dev, | |
390 | ®ulators[i], &config); | |
391 | if (IS_ERR(rdev)) { | |
392 | dev_err(&pdev->dev, "regulator init failed for %d\n", | |
393 | i); | |
394 | return PTR_ERR(rdev); | |
395 | } | |
396 | } | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | static const struct platform_device_id s2mpa01_pmic_id[] = { | |
402 | { "s2mpa01-pmic", 0}, | |
403 | { }, | |
404 | }; | |
405 | MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id); | |
406 | ||
407 | static struct platform_driver s2mpa01_pmic_driver = { | |
408 | .driver = { | |
409 | .name = "s2mpa01-pmic", | |
f1879271 SK |
410 | }, |
411 | .probe = s2mpa01_pmic_probe, | |
412 | .id_table = s2mpa01_pmic_id, | |
413 | }; | |
414 | ||
415 | module_platform_driver(s2mpa01_pmic_driver); | |
416 | ||
417 | /* Module information */ | |
418 | MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); | |
419 | MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>"); | |
420 | MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver"); | |
421 | MODULE_LICENSE("GPL"); |