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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 { | |
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 | ||
0608032a | 64 | switch (rdev_get_id(rdev)) { |
f1879271 SK |
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 | ||
0608032a | 105 | switch (rdev_get_id(rdev)) { |
f1879271 SK |
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; | |
f1879271 SK |
119 | break; |
120 | case S2MPA01_BUCK2: | |
121 | enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT; | |
122 | if (!ramp_delay) { | |
123 | ramp_enable = 0; | |
124 | break; | |
125 | } | |
126 | ||
127 | if (ramp_delay > s2mpa01->ramp_delay24) | |
128 | s2mpa01->ramp_delay24 = ramp_delay; | |
129 | else | |
130 | ramp_delay = s2mpa01->ramp_delay24; | |
131 | ||
132 | ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; | |
133 | ramp_reg = S2MPA01_REG_RAMP1; | |
134 | break; | |
135 | case S2MPA01_BUCK3: | |
136 | enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT; | |
137 | if (!ramp_delay) { | |
138 | ramp_enable = 0; | |
139 | break; | |
140 | } | |
141 | ||
142 | s2mpa01->ramp_delay3 = ramp_delay; | |
143 | ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT; | |
144 | ramp_reg = S2MPA01_REG_RAMP1; | |
145 | break; | |
146 | case S2MPA01_BUCK4: | |
147 | enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT; | |
148 | if (!ramp_delay) { | |
149 | ramp_enable = 0; | |
150 | break; | |
151 | } | |
152 | ||
153 | if (ramp_delay > s2mpa01->ramp_delay24) | |
154 | s2mpa01->ramp_delay24 = ramp_delay; | |
155 | else | |
156 | ramp_delay = s2mpa01->ramp_delay24; | |
157 | ||
158 | ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; | |
159 | ramp_reg = S2MPA01_REG_RAMP1; | |
160 | break; | |
161 | case S2MPA01_BUCK5: | |
162 | s2mpa01->ramp_delay5 = ramp_delay; | |
163 | ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT; | |
164 | break; | |
165 | case S2MPA01_BUCK6: | |
166 | if (ramp_delay > s2mpa01->ramp_delay16) | |
167 | s2mpa01->ramp_delay16 = ramp_delay; | |
168 | else | |
169 | ramp_delay = s2mpa01->ramp_delay16; | |
170 | ||
171 | ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; | |
172 | break; | |
173 | case S2MPA01_BUCK7: | |
174 | s2mpa01->ramp_delay7 = ramp_delay; | |
175 | ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT; | |
176 | break; | |
177 | case S2MPA01_BUCK8: | |
178 | case S2MPA01_BUCK9: | |
179 | case S2MPA01_BUCK10: | |
180 | if (ramp_delay > s2mpa01->ramp_delay8910) | |
181 | s2mpa01->ramp_delay8910 = ramp_delay; | |
182 | else | |
183 | ramp_delay = s2mpa01->ramp_delay8910; | |
184 | ||
185 | ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT; | |
186 | break; | |
187 | default: | |
188 | return 0; | |
189 | } | |
190 | ||
191 | if (!ramp_enable) | |
192 | goto ramp_disable; | |
193 | ||
51e2fc0a KK |
194 | /* Ramp delay can be enabled/disabled only for buck[1234] */ |
195 | if (rdev_get_id(rdev) >= S2MPA01_BUCK1 && | |
196 | rdev_get_id(rdev) <= S2MPA01_BUCK4) { | |
197 | ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, | |
198 | 1 << enable_shift, 1 << enable_shift); | |
199 | if (ret) { | |
200 | dev_err(&rdev->dev, "failed to enable ramp rate\n"); | |
201 | return ret; | |
202 | } | |
f1879271 SK |
203 | } |
204 | ||
205 | ramp_val = get_ramp_delay(ramp_delay); | |
206 | ||
207 | return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift, | |
208 | ramp_val << ramp_shift); | |
209 | ||
210 | ramp_disable: | |
211 | return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, | |
212 | 1 << enable_shift, 0); | |
213 | } | |
214 | ||
215 | static struct regulator_ops s2mpa01_ldo_ops = { | |
216 | .list_voltage = regulator_list_voltage_linear, | |
217 | .map_voltage = regulator_map_voltage_linear, | |
218 | .is_enabled = regulator_is_enabled_regmap, | |
219 | .enable = regulator_enable_regmap, | |
220 | .disable = regulator_disable_regmap, | |
221 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
222 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
223 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
224 | }; | |
225 | ||
226 | static struct regulator_ops s2mpa01_buck_ops = { | |
227 | .list_voltage = regulator_list_voltage_linear, | |
228 | .map_voltage = regulator_map_voltage_linear, | |
229 | .is_enabled = regulator_is_enabled_regmap, | |
230 | .enable = regulator_enable_regmap, | |
231 | .disable = regulator_disable_regmap, | |
232 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
233 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
234 | .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel, | |
235 | .set_ramp_delay = s2mpa01_set_ramp_delay, | |
236 | }; | |
237 | ||
d264fd45 | 238 | #define regulator_desc_ldo(num, step) { \ |
f1879271 SK |
239 | .name = "LDO"#num, \ |
240 | .id = S2MPA01_LDO##num, \ | |
241 | .ops = &s2mpa01_ldo_ops, \ | |
242 | .type = REGULATOR_VOLTAGE, \ | |
243 | .owner = THIS_MODULE, \ | |
0e4f4178 | 244 | .min_uV = MIN_800_MV, \ |
d264fd45 | 245 | .uV_step = step, \ |
f1879271 SK |
246 | .n_voltages = S2MPA01_LDO_N_VOLTAGES, \ |
247 | .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \ | |
248 | .vsel_mask = S2MPA01_LDO_VSEL_MASK, \ | |
249 | .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \ | |
250 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
251 | } | |
252 | ||
253 | #define regulator_desc_buck1_4(num) { \ | |
254 | .name = "BUCK"#num, \ | |
255 | .id = S2MPA01_BUCK##num, \ | |
256 | .ops = &s2mpa01_buck_ops, \ | |
257 | .type = REGULATOR_VOLTAGE, \ | |
258 | .owner = THIS_MODULE, \ | |
0e4f4178 ADK |
259 | .min_uV = MIN_600_MV, \ |
260 | .uV_step = STEP_6_25_MV, \ | |
f1879271 SK |
261 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
262 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
263 | .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \ | |
264 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
265 | .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \ | |
266 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
267 | } | |
268 | ||
269 | #define regulator_desc_buck5 { \ | |
270 | .name = "BUCK5", \ | |
271 | .id = S2MPA01_BUCK5, \ | |
272 | .ops = &s2mpa01_buck_ops, \ | |
273 | .type = REGULATOR_VOLTAGE, \ | |
274 | .owner = THIS_MODULE, \ | |
0e4f4178 ADK |
275 | .min_uV = MIN_800_MV, \ |
276 | .uV_step = STEP_6_25_MV, \ | |
f1879271 SK |
277 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
278 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
279 | .vsel_reg = S2MPA01_REG_B5CTRL2, \ | |
280 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
281 | .enable_reg = S2MPA01_REG_B5CTRL1, \ | |
282 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
283 | } | |
284 | ||
d264fd45 | 285 | #define regulator_desc_buck6_10(num, min, step) { \ |
f1879271 SK |
286 | .name = "BUCK"#num, \ |
287 | .id = S2MPA01_BUCK##num, \ | |
288 | .ops = &s2mpa01_buck_ops, \ | |
289 | .type = REGULATOR_VOLTAGE, \ | |
290 | .owner = THIS_MODULE, \ | |
d264fd45 ADK |
291 | .min_uV = min, \ |
292 | .uV_step = step, \ | |
f1879271 SK |
293 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
294 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
295 | .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \ | |
296 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
297 | .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \ | |
298 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
299 | } | |
300 | ||
4b8e43f2 | 301 | static const struct regulator_desc regulators[] = { |
d264fd45 ADK |
302 | regulator_desc_ldo(1, STEP_25_MV), |
303 | regulator_desc_ldo(2, STEP_50_MV), | |
304 | regulator_desc_ldo(3, STEP_50_MV), | |
305 | regulator_desc_ldo(4, STEP_50_MV), | |
306 | regulator_desc_ldo(5, STEP_50_MV), | |
307 | regulator_desc_ldo(6, STEP_25_MV), | |
308 | regulator_desc_ldo(7, STEP_50_MV), | |
309 | regulator_desc_ldo(8, STEP_50_MV), | |
310 | regulator_desc_ldo(9, STEP_50_MV), | |
311 | regulator_desc_ldo(10, STEP_50_MV), | |
312 | regulator_desc_ldo(11, STEP_25_MV), | |
313 | regulator_desc_ldo(12, STEP_50_MV), | |
314 | regulator_desc_ldo(13, STEP_50_MV), | |
315 | regulator_desc_ldo(14, STEP_50_MV), | |
316 | regulator_desc_ldo(15, STEP_50_MV), | |
317 | regulator_desc_ldo(16, STEP_50_MV), | |
318 | regulator_desc_ldo(17, STEP_50_MV), | |
319 | regulator_desc_ldo(18, STEP_50_MV), | |
320 | regulator_desc_ldo(19, STEP_50_MV), | |
321 | regulator_desc_ldo(20, STEP_50_MV), | |
322 | regulator_desc_ldo(21, STEP_50_MV), | |
323 | regulator_desc_ldo(22, STEP_25_MV), | |
324 | regulator_desc_ldo(23, STEP_25_MV), | |
325 | regulator_desc_ldo(24, STEP_50_MV), | |
326 | regulator_desc_ldo(25, STEP_50_MV), | |
327 | regulator_desc_ldo(26, STEP_50_MV), | |
f1879271 SK |
328 | regulator_desc_buck1_4(1), |
329 | regulator_desc_buck1_4(2), | |
330 | regulator_desc_buck1_4(3), | |
331 | regulator_desc_buck1_4(4), | |
332 | regulator_desc_buck5, | |
d264fd45 ADK |
333 | regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV), |
334 | regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV), | |
335 | regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV), | |
336 | regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV), | |
337 | regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV), | |
f1879271 SK |
338 | }; |
339 | ||
340 | static int s2mpa01_pmic_probe(struct platform_device *pdev) | |
341 | { | |
342 | struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
343 | struct sec_platform_data *pdata = dev_get_platdata(iodev->dev); | |
28217910 | 344 | struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX] = { }; |
f1879271 SK |
345 | struct device_node *reg_np = NULL; |
346 | struct regulator_config config = { }; | |
347 | struct s2mpa01_info *s2mpa01; | |
348 | int i; | |
349 | ||
350 | s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL); | |
351 | if (!s2mpa01) | |
352 | return -ENOMEM; | |
353 | ||
354 | for (i = 0; i < S2MPA01_REGULATOR_CNT; i++) | |
355 | rdata[i].name = regulators[i].name; | |
356 | ||
357 | if (iodev->dev->of_node) { | |
358 | reg_np = of_get_child_by_name(iodev->dev->of_node, | |
359 | "regulators"); | |
360 | if (!reg_np) { | |
361 | dev_err(&pdev->dev, | |
362 | "could not find regulators sub-node\n"); | |
363 | return -EINVAL; | |
364 | } | |
365 | ||
366 | of_regulator_match(&pdev->dev, reg_np, rdata, | |
367 | S2MPA01_REGULATOR_MAX); | |
368 | of_node_put(reg_np); | |
369 | } | |
370 | ||
371 | platform_set_drvdata(pdev, s2mpa01); | |
372 | ||
373 | config.dev = &pdev->dev; | |
374 | config.regmap = iodev->regmap_pmic; | |
375 | config.driver_data = s2mpa01; | |
376 | ||
377 | for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) { | |
378 | struct regulator_dev *rdev; | |
379 | if (pdata) | |
380 | config.init_data = pdata->regulators[i].initdata; | |
381 | else | |
382 | config.init_data = rdata[i].init_data; | |
383 | ||
384 | if (reg_np) | |
385 | config.of_node = rdata[i].of_node; | |
386 | ||
387 | rdev = devm_regulator_register(&pdev->dev, | |
388 | ®ulators[i], &config); | |
389 | if (IS_ERR(rdev)) { | |
390 | dev_err(&pdev->dev, "regulator init failed for %d\n", | |
391 | i); | |
392 | return PTR_ERR(rdev); | |
393 | } | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | static const struct platform_device_id s2mpa01_pmic_id[] = { | |
400 | { "s2mpa01-pmic", 0}, | |
401 | { }, | |
402 | }; | |
403 | MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id); | |
404 | ||
405 | static struct platform_driver s2mpa01_pmic_driver = { | |
406 | .driver = { | |
407 | .name = "s2mpa01-pmic", | |
f1879271 SK |
408 | }, |
409 | .probe = s2mpa01_pmic_probe, | |
410 | .id_table = s2mpa01_pmic_id, | |
411 | }; | |
412 | ||
413 | module_platform_driver(s2mpa01_pmic_driver); | |
414 | ||
415 | /* Module information */ | |
416 | MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); | |
417 | MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>"); | |
418 | MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver"); | |
419 | MODULE_LICENSE("GPL"); |