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4f3fb287 KK |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // Copyright (c) 2013 Samsung Electronics Co., Ltd | |
4 | // http://www.samsung.com | |
f1879271 SK |
5 | |
6 | #include <linux/bug.h> | |
7 | #include <linux/err.h> | |
8 | #include <linux/gpio.h> | |
9 | #include <linux/slab.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/of.h> | |
12 | #include <linux/regmap.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/regulator/driver.h> | |
15 | #include <linux/regulator/machine.h> | |
16 | #include <linux/regulator/of_regulator.h> | |
17 | #include <linux/mfd/samsung/core.h> | |
18 | #include <linux/mfd/samsung/s2mpa01.h> | |
19 | ||
f1879271 SK |
20 | struct s2mpa01_info { |
21 | int ramp_delay24; | |
22 | int ramp_delay3; | |
23 | int ramp_delay5; | |
24 | int ramp_delay16; | |
25 | int ramp_delay7; | |
26 | int ramp_delay8910; | |
27 | }; | |
28 | ||
29 | static int get_ramp_delay(int ramp_delay) | |
30 | { | |
31 | unsigned char cnt = 0; | |
32 | ||
33 | ramp_delay /= 6250; | |
34 | ||
35 | while (true) { | |
36 | ramp_delay = ramp_delay >> 1; | |
37 | if (ramp_delay == 0) | |
38 | break; | |
39 | cnt++; | |
40 | } | |
41 | ||
42 | if (cnt > 3) | |
43 | cnt = 3; | |
44 | ||
45 | return cnt; | |
46 | } | |
47 | ||
48 | static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev, | |
49 | unsigned int old_selector, | |
50 | unsigned int new_selector) | |
51 | { | |
52 | struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); | |
53 | unsigned int ramp_delay = 0; | |
54 | int old_volt, new_volt; | |
55 | ||
0608032a | 56 | switch (rdev_get_id(rdev)) { |
f1879271 SK |
57 | case S2MPA01_BUCK2: |
58 | case S2MPA01_BUCK4: | |
59 | ramp_delay = s2mpa01->ramp_delay24; | |
60 | break; | |
61 | case S2MPA01_BUCK3: | |
62 | ramp_delay = s2mpa01->ramp_delay3; | |
63 | break; | |
64 | case S2MPA01_BUCK5: | |
65 | ramp_delay = s2mpa01->ramp_delay5; | |
66 | break; | |
67 | case S2MPA01_BUCK1: | |
68 | case S2MPA01_BUCK6: | |
69 | ramp_delay = s2mpa01->ramp_delay16; | |
70 | break; | |
71 | case S2MPA01_BUCK7: | |
72 | ramp_delay = s2mpa01->ramp_delay7; | |
73 | break; | |
74 | case S2MPA01_BUCK8: | |
75 | case S2MPA01_BUCK9: | |
76 | case S2MPA01_BUCK10: | |
77 | ramp_delay = s2mpa01->ramp_delay8910; | |
78 | break; | |
79 | } | |
80 | ||
81 | if (ramp_delay == 0) | |
82 | ramp_delay = rdev->desc->ramp_delay; | |
83 | ||
84 | old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector); | |
85 | new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector); | |
86 | ||
87 | return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); | |
88 | } | |
89 | ||
90 | static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) | |
91 | { | |
92 | struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); | |
93 | unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2; | |
94 | unsigned int ramp_enable = 1, enable_shift = 0; | |
95 | int ret; | |
96 | ||
0608032a | 97 | switch (rdev_get_id(rdev)) { |
f1879271 SK |
98 | case S2MPA01_BUCK1: |
99 | enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT; | |
100 | if (!ramp_delay) { | |
101 | ramp_enable = 0; | |
102 | break; | |
103 | } | |
104 | ||
105 | if (ramp_delay > s2mpa01->ramp_delay16) | |
106 | s2mpa01->ramp_delay16 = ramp_delay; | |
107 | else | |
108 | ramp_delay = s2mpa01->ramp_delay16; | |
109 | ||
110 | ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; | |
f1879271 SK |
111 | break; |
112 | case S2MPA01_BUCK2: | |
113 | enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT; | |
114 | if (!ramp_delay) { | |
115 | ramp_enable = 0; | |
116 | break; | |
117 | } | |
118 | ||
119 | if (ramp_delay > s2mpa01->ramp_delay24) | |
120 | s2mpa01->ramp_delay24 = ramp_delay; | |
121 | else | |
122 | ramp_delay = s2mpa01->ramp_delay24; | |
123 | ||
124 | ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; | |
125 | ramp_reg = S2MPA01_REG_RAMP1; | |
126 | break; | |
127 | case S2MPA01_BUCK3: | |
128 | enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT; | |
129 | if (!ramp_delay) { | |
130 | ramp_enable = 0; | |
131 | break; | |
132 | } | |
133 | ||
134 | s2mpa01->ramp_delay3 = ramp_delay; | |
135 | ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT; | |
136 | ramp_reg = S2MPA01_REG_RAMP1; | |
137 | break; | |
138 | case S2MPA01_BUCK4: | |
139 | enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT; | |
140 | if (!ramp_delay) { | |
141 | ramp_enable = 0; | |
142 | break; | |
143 | } | |
144 | ||
145 | if (ramp_delay > s2mpa01->ramp_delay24) | |
146 | s2mpa01->ramp_delay24 = ramp_delay; | |
147 | else | |
148 | ramp_delay = s2mpa01->ramp_delay24; | |
149 | ||
150 | ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; | |
151 | ramp_reg = S2MPA01_REG_RAMP1; | |
152 | break; | |
153 | case S2MPA01_BUCK5: | |
154 | s2mpa01->ramp_delay5 = ramp_delay; | |
155 | ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT; | |
156 | break; | |
157 | case S2MPA01_BUCK6: | |
158 | if (ramp_delay > s2mpa01->ramp_delay16) | |
159 | s2mpa01->ramp_delay16 = ramp_delay; | |
160 | else | |
161 | ramp_delay = s2mpa01->ramp_delay16; | |
162 | ||
163 | ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; | |
164 | break; | |
165 | case S2MPA01_BUCK7: | |
166 | s2mpa01->ramp_delay7 = ramp_delay; | |
167 | ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT; | |
168 | break; | |
169 | case S2MPA01_BUCK8: | |
170 | case S2MPA01_BUCK9: | |
171 | case S2MPA01_BUCK10: | |
172 | if (ramp_delay > s2mpa01->ramp_delay8910) | |
173 | s2mpa01->ramp_delay8910 = ramp_delay; | |
174 | else | |
175 | ramp_delay = s2mpa01->ramp_delay8910; | |
176 | ||
177 | ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT; | |
178 | break; | |
179 | default: | |
180 | return 0; | |
181 | } | |
182 | ||
183 | if (!ramp_enable) | |
184 | goto ramp_disable; | |
185 | ||
51e2fc0a KK |
186 | /* Ramp delay can be enabled/disabled only for buck[1234] */ |
187 | if (rdev_get_id(rdev) >= S2MPA01_BUCK1 && | |
188 | rdev_get_id(rdev) <= S2MPA01_BUCK4) { | |
189 | ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, | |
190 | 1 << enable_shift, 1 << enable_shift); | |
191 | if (ret) { | |
192 | dev_err(&rdev->dev, "failed to enable ramp rate\n"); | |
193 | return ret; | |
194 | } | |
f1879271 SK |
195 | } |
196 | ||
197 | ramp_val = get_ramp_delay(ramp_delay); | |
198 | ||
199 | return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift, | |
200 | ramp_val << ramp_shift); | |
201 | ||
202 | ramp_disable: | |
203 | return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, | |
204 | 1 << enable_shift, 0); | |
205 | } | |
206 | ||
f465bf9b | 207 | static const struct regulator_ops s2mpa01_ldo_ops = { |
f1879271 SK |
208 | .list_voltage = regulator_list_voltage_linear, |
209 | .map_voltage = regulator_map_voltage_linear, | |
210 | .is_enabled = regulator_is_enabled_regmap, | |
211 | .enable = regulator_enable_regmap, | |
212 | .disable = regulator_disable_regmap, | |
213 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
214 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
215 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
216 | }; | |
217 | ||
f465bf9b | 218 | static const struct regulator_ops s2mpa01_buck_ops = { |
f1879271 SK |
219 | .list_voltage = regulator_list_voltage_linear, |
220 | .map_voltage = regulator_map_voltage_linear, | |
221 | .is_enabled = regulator_is_enabled_regmap, | |
222 | .enable = regulator_enable_regmap, | |
223 | .disable = regulator_disable_regmap, | |
224 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
225 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
226 | .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel, | |
227 | .set_ramp_delay = s2mpa01_set_ramp_delay, | |
228 | }; | |
229 | ||
d264fd45 | 230 | #define regulator_desc_ldo(num, step) { \ |
f1879271 | 231 | .name = "LDO"#num, \ |
0677c3ea AL |
232 | .of_match = of_match_ptr("LDO"#num), \ |
233 | .regulators_node = of_match_ptr("regulators"), \ | |
f1879271 SK |
234 | .id = S2MPA01_LDO##num, \ |
235 | .ops = &s2mpa01_ldo_ops, \ | |
236 | .type = REGULATOR_VOLTAGE, \ | |
237 | .owner = THIS_MODULE, \ | |
0e4f4178 | 238 | .min_uV = MIN_800_MV, \ |
d264fd45 | 239 | .uV_step = step, \ |
f1879271 SK |
240 | .n_voltages = S2MPA01_LDO_N_VOLTAGES, \ |
241 | .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \ | |
242 | .vsel_mask = S2MPA01_LDO_VSEL_MASK, \ | |
243 | .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \ | |
244 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
245 | } | |
246 | ||
247 | #define regulator_desc_buck1_4(num) { \ | |
248 | .name = "BUCK"#num, \ | |
0677c3ea AL |
249 | .of_match = of_match_ptr("BUCK"#num), \ |
250 | .regulators_node = of_match_ptr("regulators"), \ | |
f1879271 SK |
251 | .id = S2MPA01_BUCK##num, \ |
252 | .ops = &s2mpa01_buck_ops, \ | |
253 | .type = REGULATOR_VOLTAGE, \ | |
254 | .owner = THIS_MODULE, \ | |
0e4f4178 ADK |
255 | .min_uV = MIN_600_MV, \ |
256 | .uV_step = STEP_6_25_MV, \ | |
f1879271 SK |
257 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
258 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
259 | .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \ | |
260 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
261 | .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \ | |
262 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
263 | } | |
264 | ||
265 | #define regulator_desc_buck5 { \ | |
266 | .name = "BUCK5", \ | |
0677c3ea AL |
267 | .of_match = of_match_ptr("BUCK5"), \ |
268 | .regulators_node = of_match_ptr("regulators"), \ | |
f1879271 SK |
269 | .id = S2MPA01_BUCK5, \ |
270 | .ops = &s2mpa01_buck_ops, \ | |
271 | .type = REGULATOR_VOLTAGE, \ | |
272 | .owner = THIS_MODULE, \ | |
0e4f4178 ADK |
273 | .min_uV = MIN_800_MV, \ |
274 | .uV_step = STEP_6_25_MV, \ | |
f1879271 SK |
275 | .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
276 | .ramp_delay = S2MPA01_RAMP_DELAY, \ | |
277 | .vsel_reg = S2MPA01_REG_B5CTRL2, \ | |
278 | .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ | |
279 | .enable_reg = S2MPA01_REG_B5CTRL1, \ | |
280 | .enable_mask = S2MPA01_ENABLE_MASK \ | |
281 | } | |
282 | ||
d264fd45 | 283 | #define regulator_desc_buck6_10(num, min, step) { \ |
f1879271 | 284 | .name = "BUCK"#num, \ |
0677c3ea AL |
285 | .of_match = of_match_ptr("BUCK"#num), \ |
286 | .regulators_node = of_match_ptr("regulators"), \ | |
f1879271 SK |
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), | |
28c4f730 | 306 | regulator_desc_ldo(5, STEP_25_MV), |
d264fd45 ADK |
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), | |
28c4f730 | 312 | regulator_desc_ldo(11, STEP_50_MV), |
d264fd45 ADK |
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), | |
28c4f730 SM |
323 | regulator_desc_ldo(22, STEP_50_MV), |
324 | regulator_desc_ldo(23, STEP_50_MV), | |
d264fd45 ADK |
325 | regulator_desc_ldo(24, STEP_50_MV), |
326 | regulator_desc_ldo(25, STEP_50_MV), | |
28c4f730 | 327 | regulator_desc_ldo(26, STEP_25_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); | |
f1879271 SK |
343 | struct regulator_config config = { }; |
344 | struct s2mpa01_info *s2mpa01; | |
345 | int i; | |
346 | ||
347 | s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL); | |
348 | if (!s2mpa01) | |
349 | return -ENOMEM; | |
350 | ||
0677c3ea | 351 | config.dev = iodev->dev; |
f1879271 SK |
352 | config.regmap = iodev->regmap_pmic; |
353 | config.driver_data = s2mpa01; | |
354 | ||
355 | for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) { | |
356 | struct regulator_dev *rdev; | |
0677c3ea | 357 | |
f1879271 SK |
358 | rdev = devm_regulator_register(&pdev->dev, |
359 | ®ulators[i], &config); | |
360 | if (IS_ERR(rdev)) { | |
361 | dev_err(&pdev->dev, "regulator init failed for %d\n", | |
362 | i); | |
363 | return PTR_ERR(rdev); | |
364 | } | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | static const struct platform_device_id s2mpa01_pmic_id[] = { | |
371 | { "s2mpa01-pmic", 0}, | |
372 | { }, | |
373 | }; | |
374 | MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id); | |
375 | ||
376 | static struct platform_driver s2mpa01_pmic_driver = { | |
377 | .driver = { | |
378 | .name = "s2mpa01-pmic", | |
259b93b2 | 379 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
f1879271 SK |
380 | }, |
381 | .probe = s2mpa01_pmic_probe, | |
382 | .id_table = s2mpa01_pmic_id, | |
383 | }; | |
384 | ||
385 | module_platform_driver(s2mpa01_pmic_driver); | |
386 | ||
387 | /* Module information */ | |
388 | MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); | |
389 | MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>"); | |
fc2b10d1 | 390 | MODULE_DESCRIPTION("Samsung S2MPA01 Regulator Driver"); |
f1879271 | 391 | MODULE_LICENSE("GPL"); |