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1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | // | |
3 | // Copyright 2014 Embest Technology Co. Ltd. Inc. | |
4 | // bd71815-regulator.c ROHM BD71815 regulator driver | |
5 | // | |
6 | // Author: Tony Luo <luofc@embedinfo.com> | |
7 | // | |
8 | // Partially rewritten at 2021 by | |
9 | // Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com> | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/platform_device.h> | |
3799fa23 AL |
16 | #include <linux/of.h> |
17 | #include <linux/gpio/consumer.h> | |
1aad3900 MV |
18 | #include <linux/regulator/driver.h> |
19 | #include <linux/delay.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/gpio.h> | |
22 | #include <linux/mfd/rohm-generic.h> | |
23 | #include <linux/mfd/rohm-bd71815.h> | |
24 | #include <linux/regulator/of_regulator.h> | |
25 | ||
26 | struct bd71815_regulator { | |
27 | struct regulator_desc desc; | |
28 | const struct rohm_dvs_config *dvs; | |
29 | }; | |
30 | ||
1aad3900 MV |
31 | static const int bd7181x_wled_currents[] = { |
32 | 10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000, | |
33 | 5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, | |
34 | 16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000, | |
35 | }; | |
36 | ||
37 | static const struct rohm_dvs_config buck1_dvs = { | |
38 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
39 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
40 | .run_reg = BD71815_REG_BUCK1_VOLT_H, | |
41 | .run_mask = BD71815_VOLT_MASK, | |
42 | .run_on_mask = BD71815_BUCK_RUN_ON, | |
43 | .snvs_on_mask = BD71815_BUCK_SNVS_ON, | |
44 | .suspend_reg = BD71815_REG_BUCK1_VOLT_L, | |
45 | .suspend_mask = BD71815_VOLT_MASK, | |
46 | .suspend_on_mask = BD71815_BUCK_SUSP_ON, | |
47 | .lpsr_reg = BD71815_REG_BUCK1_VOLT_L, | |
48 | .lpsr_mask = BD71815_VOLT_MASK, | |
49 | .lpsr_on_mask = BD71815_BUCK_LPSR_ON, | |
50 | }; | |
51 | ||
52 | static const struct rohm_dvs_config buck2_dvs = { | |
53 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
54 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
55 | .run_reg = BD71815_REG_BUCK2_VOLT_H, | |
56 | .run_mask = BD71815_VOLT_MASK, | |
57 | .run_on_mask = BD71815_BUCK_RUN_ON, | |
58 | .snvs_on_mask = BD71815_BUCK_SNVS_ON, | |
59 | .suspend_reg = BD71815_REG_BUCK2_VOLT_L, | |
60 | .suspend_mask = BD71815_VOLT_MASK, | |
61 | .suspend_on_mask = BD71815_BUCK_SUSP_ON, | |
62 | .lpsr_reg = BD71815_REG_BUCK2_VOLT_L, | |
63 | .lpsr_mask = BD71815_VOLT_MASK, | |
64 | .lpsr_on_mask = BD71815_BUCK_LPSR_ON, | |
65 | }; | |
66 | ||
67 | static const struct rohm_dvs_config buck3_dvs = { | |
68 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
69 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
70 | .run_reg = BD71815_REG_BUCK3_VOLT, | |
71 | .run_mask = BD71815_VOLT_MASK, | |
72 | .run_on_mask = BD71815_BUCK_RUN_ON, | |
73 | .snvs_on_mask = BD71815_BUCK_SNVS_ON, | |
74 | .suspend_on_mask = BD71815_BUCK_SUSP_ON, | |
75 | .lpsr_on_mask = BD71815_BUCK_LPSR_ON, | |
76 | }; | |
77 | ||
78 | static const struct rohm_dvs_config buck4_dvs = { | |
79 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
80 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
81 | .run_reg = BD71815_REG_BUCK4_VOLT, | |
82 | .run_mask = BD71815_VOLT_MASK, | |
83 | .run_on_mask = BD71815_BUCK_RUN_ON, | |
84 | .snvs_on_mask = BD71815_BUCK_SNVS_ON, | |
85 | .suspend_on_mask = BD71815_BUCK_SUSP_ON, | |
86 | .lpsr_on_mask = BD71815_BUCK_LPSR_ON, | |
87 | }; | |
88 | ||
89 | static const struct rohm_dvs_config ldo1_dvs = { | |
90 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
91 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
92 | .run_reg = BD71815_REG_LDO_MODE1, | |
93 | .run_mask = BD71815_VOLT_MASK, | |
94 | .run_on_mask = LDO1_RUN_ON, | |
95 | .snvs_on_mask = LDO1_SNVS_ON, | |
96 | .suspend_on_mask = LDO1_SUSP_ON, | |
97 | .lpsr_on_mask = LDO1_LPSR_ON, | |
98 | }; | |
99 | ||
100 | static const struct rohm_dvs_config ldo2_dvs = { | |
101 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
102 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
103 | .run_reg = BD71815_REG_LDO_MODE2, | |
104 | .run_mask = BD71815_VOLT_MASK, | |
105 | .run_on_mask = LDO2_RUN_ON, | |
106 | .snvs_on_mask = LDO2_SNVS_ON, | |
107 | .suspend_on_mask = LDO2_SUSP_ON, | |
108 | .lpsr_on_mask = LDO2_LPSR_ON, | |
109 | }; | |
110 | ||
111 | static const struct rohm_dvs_config ldo3_dvs = { | |
112 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
113 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
114 | .run_reg = BD71815_REG_LDO_MODE2, | |
115 | .run_mask = BD71815_VOLT_MASK, | |
116 | .run_on_mask = LDO3_RUN_ON, | |
117 | .snvs_on_mask = LDO3_SNVS_ON, | |
118 | .suspend_on_mask = LDO3_SUSP_ON, | |
119 | .lpsr_on_mask = LDO3_LPSR_ON, | |
120 | }; | |
121 | ||
122 | static const struct rohm_dvs_config ldo4_dvs = { | |
123 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
124 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
125 | .run_reg = BD71815_REG_LDO_MODE3, | |
126 | .run_mask = BD71815_VOLT_MASK, | |
127 | .run_on_mask = LDO4_RUN_ON, | |
128 | .snvs_on_mask = LDO4_SNVS_ON, | |
129 | .suspend_on_mask = LDO4_SUSP_ON, | |
130 | .lpsr_on_mask = LDO4_LPSR_ON, | |
131 | }; | |
132 | ||
133 | static const struct rohm_dvs_config ldo5_dvs = { | |
134 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
135 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
136 | .run_reg = BD71815_REG_LDO_MODE3, | |
137 | .run_mask = BD71815_VOLT_MASK, | |
138 | .run_on_mask = LDO5_RUN_ON, | |
139 | .snvs_on_mask = LDO5_SNVS_ON, | |
140 | .suspend_on_mask = LDO5_SUSP_ON, | |
141 | .lpsr_on_mask = LDO5_LPSR_ON, | |
142 | }; | |
143 | ||
144 | static const struct rohm_dvs_config dvref_dvs = { | |
145 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
146 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
147 | .run_on_mask = DVREF_RUN_ON, | |
148 | .snvs_on_mask = DVREF_SNVS_ON, | |
149 | .suspend_on_mask = DVREF_SUSP_ON, | |
150 | .lpsr_on_mask = DVREF_LPSR_ON, | |
151 | }; | |
152 | ||
153 | static const struct rohm_dvs_config ldolpsr_dvs = { | |
154 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
155 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
156 | .run_on_mask = DVREF_RUN_ON, | |
157 | .snvs_on_mask = DVREF_SNVS_ON, | |
158 | .suspend_on_mask = DVREF_SUSP_ON, | |
159 | .lpsr_on_mask = DVREF_LPSR_ON, | |
160 | }; | |
161 | ||
162 | static const struct rohm_dvs_config buck5_dvs = { | |
163 | .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | | |
164 | ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, | |
165 | .run_reg = BD71815_REG_BUCK5_VOLT, | |
166 | .run_mask = BD71815_VOLT_MASK, | |
167 | .run_on_mask = BD71815_BUCK_RUN_ON, | |
168 | .snvs_on_mask = BD71815_BUCK_SNVS_ON, | |
169 | .suspend_on_mask = BD71815_BUCK_SUSP_ON, | |
170 | .lpsr_on_mask = BD71815_BUCK_LPSR_ON, | |
171 | }; | |
172 | ||
173 | static int set_hw_dvs_levels(struct device_node *np, | |
174 | const struct regulator_desc *desc, | |
175 | struct regulator_config *cfg) | |
176 | { | |
177 | struct bd71815_regulator *data; | |
178 | ||
179 | data = container_of(desc, struct bd71815_regulator, desc); | |
180 | return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Bucks 1 and 2 have two voltage selection registers where selected | |
185 | * voltage can be set. Which of the registers is used can be either controlled | |
186 | * by a control bit in register - or by HW state. If HW state specific voltages | |
187 | * are given - then we assume HW state based control should be used. | |
188 | * | |
189 | * If volatge value is updated to currently selected register - then output | |
190 | * voltage is immediately changed no matter what is set as ramp rate. Thus we | |
191 | * default changing voltage by writing new value to inactive register and | |
192 | * then updating the 'register selection' bit. This naturally only works when | |
193 | * HW state machine is not used to select the voltage. | |
194 | */ | |
195 | static int buck12_set_hw_dvs_levels(struct device_node *np, | |
196 | const struct regulator_desc *desc, | |
197 | struct regulator_config *cfg) | |
198 | { | |
199 | struct bd71815_regulator *data; | |
200 | int ret = 0, val; | |
201 | ||
202 | data = container_of(desc, struct bd71815_regulator, desc); | |
203 | ||
204 | if (of_find_property(np, "rohm,dvs-run-voltage", NULL) || | |
205 | of_find_property(np, "rohm,dvs-suspend-voltage", NULL) || | |
206 | of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) || | |
207 | of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) { | |
208 | ret = regmap_read(cfg->regmap, desc->vsel_reg, &val); | |
209 | if (ret) | |
210 | return ret; | |
211 | ||
212 | if (!(BD71815_BUCK_STBY_DVS & val) && | |
213 | !(BD71815_BUCK_DVSSEL & val)) { | |
214 | int val2; | |
215 | ||
216 | /* | |
217 | * We are currently using voltage from _L. | |
218 | * We'd better copy it to _H and switch to it to | |
219 | * avoid shutting us down if LPSR or SUSPEND is set to | |
220 | * disabled. _L value is at reg _H + 1 | |
221 | */ | |
222 | ret = regmap_read(cfg->regmap, desc->vsel_reg + 1, | |
223 | &val2); | |
224 | if (ret) | |
225 | return ret; | |
226 | ||
227 | ret = regmap_update_bits(cfg->regmap, desc->vsel_reg, | |
228 | BD71815_VOLT_MASK | | |
229 | BD71815_BUCK_DVSSEL, | |
230 | val2 | BD71815_BUCK_DVSSEL); | |
231 | if (ret) | |
232 | return ret; | |
233 | } | |
234 | ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc, | |
235 | cfg->regmap); | |
236 | if (ret) | |
237 | return ret; | |
238 | /* | |
239 | * DVS levels were given => use HW-state machine for voltage | |
240 | * controls. NOTE: AFAIK, This means that if voltage is changed | |
241 | * by SW the ramp-rate is not respected. Should we disable | |
242 | * SW voltage control when the HW state machine is used? | |
243 | */ | |
244 | ret = regmap_update_bits(cfg->regmap, desc->vsel_reg, | |
245 | BD71815_BUCK_STBY_DVS, | |
246 | BD71815_BUCK_STBY_DVS); | |
247 | } | |
248 | ||
249 | return ret; | |
250 | } | |
251 | ||
252 | /* | |
253 | * BUCK1/2 | |
254 | * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting | |
255 | * 00: 10.00mV/usec 10mV 1uS | |
256 | * 01: 5.00mV/usec 10mV 2uS | |
257 | * 10: 2.50mV/usec 10mV 4uS | |
258 | * 11: 1.25mV/usec 10mV 8uS | |
259 | */ | |
260 | static const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 }; | |
261 | ||
262 | static int bd7181x_led_set_current_limit(struct regulator_dev *rdev, | |
263 | int min_uA, int max_uA) | |
264 | { | |
265 | int ret; | |
266 | int onstatus; | |
267 | ||
268 | onstatus = regulator_is_enabled_regmap(rdev); | |
269 | ||
270 | ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA); | |
271 | if (!ret) { | |
272 | int newstatus; | |
273 | ||
274 | newstatus = regulator_is_enabled_regmap(rdev); | |
275 | if (onstatus != newstatus) { | |
276 | /* | |
277 | * HW FIX: spurious led status change detected. Toggle | |
278 | * state as a workaround | |
279 | */ | |
280 | if (onstatus) | |
281 | ret = regulator_enable_regmap(rdev); | |
282 | else | |
283 | ret = regulator_disable_regmap(rdev); | |
284 | ||
285 | if (ret) | |
286 | dev_err(rdev_get_dev(rdev), | |
287 | "failed to revert the LED state (%d)\n", | |
288 | ret); | |
289 | } | |
290 | } | |
291 | ||
292 | return ret; | |
293 | } | |
294 | ||
295 | static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev) | |
296 | { | |
1aad3900 MV |
297 | int rid = rdev_get_id(rdev); |
298 | int ret, regh, regl, val; | |
299 | ||
300 | regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2; | |
301 | regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2; | |
302 | ||
0ea461b4 | 303 | ret = regmap_read(rdev->regmap, regh, &val); |
1aad3900 MV |
304 | if (ret) |
305 | return ret; | |
306 | ||
307 | /* | |
308 | * If we use HW state machine based voltage reg selection - then we | |
309 | * return BD71815_REG_BUCK1_VOLT_H which is used at RUN. | |
310 | * Else we do return the BD71815_REG_BUCK1_VOLT_H or | |
311 | * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used | |
312 | * by BD71815_BUCK_DVSSEL bit | |
313 | */ | |
314 | if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL))) | |
0ea461b4 | 315 | ret = regmap_read(rdev->regmap, regl, &val); |
1aad3900 MV |
316 | |
317 | if (ret) | |
318 | return ret; | |
319 | ||
320 | return val & BD71815_VOLT_MASK; | |
321 | } | |
322 | ||
323 | /* | |
324 | * For Buck 1/2. | |
325 | */ | |
326 | static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev, | |
327 | unsigned int sel) | |
328 | { | |
1aad3900 MV |
329 | int rid = rdev_get_id(rdev); |
330 | int ret, val, reg, regh, regl; | |
331 | ||
332 | regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2; | |
333 | regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2; | |
334 | ||
0ea461b4 | 335 | ret = regmap_read(rdev->regmap, regh, &val); |
1aad3900 MV |
336 | if (ret) |
337 | return ret; | |
338 | ||
339 | /* | |
340 | * If bucks 1 & 2 are controlled by state machine - then the RUN state | |
341 | * voltage is set to BD71815_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR | |
342 | * voltages at runtime is not supported by this driver. | |
343 | */ | |
344 | if (((val & BD71815_BUCK_STBY_DVS))) { | |
0ea461b4 | 345 | return regmap_update_bits(rdev->regmap, regh, BD71815_VOLT_MASK, |
1aad3900 MV |
346 | sel); |
347 | } | |
348 | /* Update new voltage to the register which is not selected now */ | |
349 | if (val & BD71815_BUCK_DVSSEL) | |
350 | reg = regl; | |
351 | else | |
352 | reg = regh; | |
353 | ||
0ea461b4 | 354 | ret = regmap_update_bits(rdev->regmap, reg, BD71815_VOLT_MASK, sel); |
1aad3900 MV |
355 | if (ret) |
356 | return ret; | |
357 | ||
358 | /* Select the other DVS register to be used */ | |
0ea461b4 AL |
359 | return regmap_update_bits(rdev->regmap, regh, BD71815_BUCK_DVSSEL, |
360 | ~val); | |
1aad3900 MV |
361 | } |
362 | ||
363 | static const struct regulator_ops bd7181x_ldo_regulator_ops = { | |
364 | .enable = regulator_enable_regmap, | |
365 | .disable = regulator_disable_regmap, | |
366 | .is_enabled = regulator_is_enabled_regmap, | |
367 | .list_voltage = regulator_list_voltage_linear, | |
368 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
369 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
370 | }; | |
371 | ||
372 | static const struct regulator_ops bd7181x_fixed_regulator_ops = { | |
373 | .enable = regulator_enable_regmap, | |
374 | .disable = regulator_disable_regmap, | |
375 | .is_enabled = regulator_is_enabled_regmap, | |
376 | .list_voltage = regulator_list_voltage_linear, | |
377 | }; | |
378 | ||
379 | static const struct regulator_ops bd7181x_buck_regulator_ops = { | |
380 | .enable = regulator_enable_regmap, | |
381 | .disable = regulator_disable_regmap, | |
382 | .is_enabled = regulator_is_enabled_regmap, | |
383 | .list_voltage = regulator_list_voltage_linear, | |
384 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
385 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
386 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
387 | }; | |
388 | ||
389 | static const struct regulator_ops bd7181x_buck12_regulator_ops = { | |
390 | .enable = regulator_enable_regmap, | |
391 | .disable = regulator_disable_regmap, | |
392 | .is_enabled = regulator_is_enabled_regmap, | |
393 | .list_voltage = regulator_list_voltage_linear, | |
394 | .set_voltage_sel = bd7181x_buck12_set_voltage_sel, | |
395 | .get_voltage_sel = bd7181x_buck12_get_voltage_sel, | |
396 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
397 | .set_ramp_delay = regulator_set_ramp_delay_regmap, | |
398 | }; | |
399 | ||
400 | static const struct regulator_ops bd7181x_led_regulator_ops = { | |
401 | .enable = regulator_enable_regmap, | |
402 | .disable = regulator_disable_regmap, | |
403 | .is_enabled = regulator_is_enabled_regmap, | |
404 | .set_current_limit = bd7181x_led_set_current_limit, | |
405 | .get_current_limit = regulator_get_current_limit_regmap, | |
406 | }; | |
407 | ||
408 | #define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs) \ | |
409 | [(_id)] = { \ | |
410 | .desc = { \ | |
411 | .name = #_name, \ | |
412 | .of_match = of_match_ptr(#_name), \ | |
413 | .regulators_node = of_match_ptr("regulators"), \ | |
414 | .n_voltages = 1, \ | |
415 | .ops = &bd7181x_fixed_regulator_ops, \ | |
416 | .type = REGULATOR_VOLTAGE, \ | |
417 | .id = (_id), \ | |
418 | .owner = THIS_MODULE, \ | |
419 | .min_uV = (voltage), \ | |
420 | .enable_reg = (ereg), \ | |
421 | .enable_mask = (emsk), \ | |
422 | .of_parse_cb = set_hw_dvs_levels, \ | |
423 | }, \ | |
424 | .dvs = (_dvs), \ | |
425 | } | |
426 | ||
427 | #define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs) \ | |
428 | [(_id)] = { \ | |
429 | .desc = { \ | |
430 | .name = #_name, \ | |
431 | .of_match = of_match_ptr(#_name), \ | |
432 | .regulators_node = of_match_ptr("regulators"), \ | |
433 | .n_voltages = ((max) - (min)) / (step) + 1, \ | |
434 | .ops = &bd7181x_buck_regulator_ops, \ | |
435 | .type = REGULATOR_VOLTAGE, \ | |
436 | .id = (_id), \ | |
437 | .owner = THIS_MODULE, \ | |
438 | .min_uV = (min), \ | |
439 | .uV_step = (step), \ | |
440 | .vsel_reg = (vsel), \ | |
441 | .vsel_mask = BD71815_VOLT_MASK, \ | |
442 | .enable_reg = (ereg), \ | |
443 | .enable_mask = BD71815_BUCK_RUN_ON, \ | |
444 | .of_parse_cb = set_hw_dvs_levels, \ | |
445 | }, \ | |
446 | .dvs = (_dvs), \ | |
447 | } | |
448 | ||
449 | #define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step, \ | |
450 | _dvs) \ | |
451 | [(_id)] = { \ | |
452 | .desc = { \ | |
453 | .name = #_name, \ | |
454 | .of_match = of_match_ptr(#_name), \ | |
455 | .regulators_node = of_match_ptr("regulators"), \ | |
456 | .n_voltages = ((max) - (min)) / (step) + 1, \ | |
457 | .ops = &bd7181x_buck12_regulator_ops, \ | |
458 | .type = REGULATOR_VOLTAGE, \ | |
459 | .id = (_id), \ | |
460 | .owner = THIS_MODULE, \ | |
461 | .min_uV = (min), \ | |
462 | .uV_step = (step), \ | |
463 | .vsel_reg = (vsel), \ | |
555767fd | 464 | .vsel_mask = BD71815_VOLT_MASK, \ |
1aad3900 | 465 | .enable_reg = (ereg), \ |
555767fd | 466 | .enable_mask = BD71815_BUCK_RUN_ON, \ |
1aad3900 MV |
467 | .ramp_reg = (ereg), \ |
468 | .ramp_mask = BD71815_BUCK_RAMPRATE_MASK, \ | |
469 | .ramp_delay_table = bd7181x_ramp_table, \ | |
470 | .n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\ | |
471 | .of_parse_cb = buck12_set_hw_dvs_levels, \ | |
472 | }, \ | |
473 | .dvs = (_dvs), \ | |
474 | } | |
475 | ||
476 | #define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents) \ | |
477 | [(_id)] = { \ | |
478 | .desc = { \ | |
479 | .name = #_name, \ | |
480 | .of_match = of_match_ptr(#_name), \ | |
481 | .regulators_node = of_match_ptr("regulators"), \ | |
482 | .n_current_limits = ARRAY_SIZE(currents), \ | |
483 | .ops = &bd7181x_led_regulator_ops, \ | |
484 | .type = REGULATOR_CURRENT, \ | |
485 | .id = (_id), \ | |
486 | .owner = THIS_MODULE, \ | |
487 | .curr_table = currents, \ | |
488 | .csel_reg = (csel), \ | |
489 | .csel_mask = (mask), \ | |
490 | .enable_reg = (ereg), \ | |
491 | .enable_mask = (emsk), \ | |
492 | }, \ | |
493 | } | |
494 | ||
495 | #define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step, \ | |
496 | _dvs) \ | |
497 | [(_id)] = { \ | |
498 | .desc = { \ | |
499 | .name = #_name, \ | |
500 | .of_match = of_match_ptr(#_name), \ | |
501 | .regulators_node = of_match_ptr("regulators"), \ | |
502 | .n_voltages = ((max) - (min)) / (step) + 1, \ | |
503 | .ops = &bd7181x_ldo_regulator_ops, \ | |
504 | .type = REGULATOR_VOLTAGE, \ | |
505 | .id = (_id), \ | |
506 | .owner = THIS_MODULE, \ | |
507 | .min_uV = (min), \ | |
508 | .uV_step = (step), \ | |
509 | .vsel_reg = (vsel), \ | |
510 | .vsel_mask = BD71815_VOLT_MASK, \ | |
511 | .enable_reg = (ereg), \ | |
512 | .enable_mask = (emsk), \ | |
513 | .of_parse_cb = set_hw_dvs_levels, \ | |
514 | }, \ | |
515 | .dvs = (_dvs), \ | |
516 | } | |
517 | ||
0ea461b4 | 518 | static const struct bd71815_regulator bd71815_regulators[] = { |
1aad3900 MV |
519 | BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H, |
520 | BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000, | |
521 | &buck1_dvs), | |
522 | BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H, | |
523 | BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000, | |
524 | &buck2_dvs), | |
525 | BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT, | |
526 | BD71815_REG_BUCK3_MODE, 1200000, 2700000, 50000, | |
527 | &buck3_dvs), | |
528 | BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT, | |
529 | BD71815_REG_BUCK4_MODE, 1100000, 1850000, 25000, | |
530 | &buck4_dvs), | |
531 | BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT, | |
532 | BD71815_REG_BUCK5_MODE, 1800000, 3300000, 50000, | |
533 | &buck5_dvs), | |
534 | BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT, | |
535 | BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000, | |
536 | 50000, &ldo1_dvs), | |
537 | BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT, | |
538 | BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000, | |
539 | 50000, &ldo2_dvs), | |
540 | /* | |
541 | * Let's default LDO3 to be enabled by SW. We can override ops if DT | |
542 | * says LDO3 should be enabled by HW when DCIN is connected. | |
543 | */ | |
544 | BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT, | |
545 | BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000, | |
546 | 50000, &ldo3_dvs), | |
547 | BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT, | |
548 | BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000, | |
549 | 50000, &ldo4_dvs), | |
550 | BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H, | |
551 | BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000, | |
552 | 50000, &ldo5_dvs), | |
553 | BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4, | |
554 | DVREF_RUN_ON, 3000000, &dvref_dvs), | |
555 | BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4, | |
556 | LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs), | |
557 | BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK, | |
558 | BD71815_REG_LED_CTRL, LED_RUN_ON, | |
559 | bd7181x_wled_currents), | |
560 | }; | |
561 | ||
562 | static int bd7181x_probe(struct platform_device *pdev) | |
563 | { | |
1aad3900 MV |
564 | struct regulator_config config = {}; |
565 | int i, ret; | |
566 | struct gpio_desc *ldo4_en; | |
0ea461b4 | 567 | struct regmap *regmap; |
1aad3900 | 568 | |
0ea461b4 AL |
569 | regmap = dev_get_regmap(pdev->dev.parent, NULL); |
570 | if (!regmap) { | |
571 | dev_err(&pdev->dev, "No parent regmap\n"); | |
1aad3900 MV |
572 | return -ENODEV; |
573 | } | |
1aad3900 | 574 | |
97c9278e DT |
575 | ldo4_en = devm_fwnode_gpiod_get(&pdev->dev, |
576 | dev_fwnode(pdev->dev.parent), | |
577 | "rohm,vsel", GPIOD_ASIS, "ldo4-en"); | |
1aad3900 MV |
578 | if (IS_ERR(ldo4_en)) { |
579 | ret = PTR_ERR(ldo4_en); | |
580 | if (ret != -ENOENT) | |
581 | return ret; | |
582 | ldo4_en = NULL; | |
583 | } | |
584 | ||
585 | /* Disable to go to ship-mode */ | |
0ea461b4 | 586 | ret = regmap_update_bits(regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0); |
1aad3900 MV |
587 | if (ret) |
588 | return ret; | |
589 | ||
590 | config.dev = pdev->dev.parent; | |
0ea461b4 | 591 | config.regmap = regmap; |
1aad3900 MV |
592 | |
593 | for (i = 0; i < BD71815_REGULATOR_CNT; i++) { | |
0ea461b4 | 594 | const struct regulator_desc *desc; |
1aad3900 MV |
595 | struct regulator_dev *rdev; |
596 | ||
0ea461b4 AL |
597 | desc = &bd71815_regulators[i].desc; |
598 | ||
1aad3900 MV |
599 | if (i == BD71815_LDO4) |
600 | config.ena_gpiod = ldo4_en; | |
0ea461b4 AL |
601 | else |
602 | config.ena_gpiod = NULL; | |
1aad3900 MV |
603 | |
604 | rdev = devm_regulator_register(&pdev->dev, desc, &config); | |
605 | if (IS_ERR(rdev)) { | |
606 | dev_err(&pdev->dev, | |
607 | "failed to register %s regulator\n", | |
608 | desc->name); | |
609 | return PTR_ERR(rdev); | |
610 | } | |
1aad3900 MV |
611 | } |
612 | return 0; | |
613 | } | |
614 | ||
615 | static const struct platform_device_id bd7181x_pmic_id[] = { | |
616 | { "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 }, | |
617 | { }, | |
618 | }; | |
619 | MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id); | |
620 | ||
621 | static struct platform_driver bd7181x_regulator = { | |
622 | .driver = { | |
623 | .name = "bd7181x-pmic", | |
1aad3900 MV |
624 | }, |
625 | .probe = bd7181x_probe, | |
626 | .id_table = bd7181x_pmic_id, | |
627 | }; | |
628 | module_platform_driver(bd7181x_regulator); | |
629 | ||
630 | MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>"); | |
631 | MODULE_DESCRIPTION("BD71815 voltage regulator driver"); | |
632 | MODULE_LICENSE("GPL v2"); | |
633 | MODULE_ALIAS("platform:bd7181x-pmic"); |