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ffee1909 GY |
1 | /* |
2 | * max8907-regulator.c -- support regulators in max8907 | |
3 | * | |
4 | * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com> | |
5 | * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved. | |
6 | * | |
7 | * Portions based on drivers/regulator/tps65910-regulator.c, | |
8 | * Copyright 2010 Texas Instruments Inc. | |
9 | * Author: Graeme Gregory <gg@slimlogic.co.uk> | |
10 | * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/err.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/mfd/core.h> | |
20 | #include <linux/mfd/max8907.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/of.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/regulator/driver.h> | |
25 | #include <linux/regulator/machine.h> | |
26 | #include <linux/regulator/of_regulator.h> | |
27 | #include <linux/regmap.h> | |
28 | #include <linux/slab.h> | |
29 | ||
30 | #define MAX8907_II2RR_VERSION_MASK 0xF0 | |
31 | #define MAX8907_II2RR_VERSION_REV_A 0x00 | |
32 | #define MAX8907_II2RR_VERSION_REV_B 0x10 | |
33 | #define MAX8907_II2RR_VERSION_REV_C 0x30 | |
34 | ||
35 | struct max8907_regulator { | |
36 | struct regulator_desc desc[MAX8907_NUM_REGULATORS]; | |
37 | struct regulator_dev *rdev[MAX8907_NUM_REGULATORS]; | |
38 | }; | |
39 | ||
40 | #define REG_MBATT() \ | |
41 | [MAX8907_MBATT] = { \ | |
42 | .name = "MBATT", \ | |
43 | .supply_name = "mbatt", \ | |
44 | .id = MAX8907_MBATT, \ | |
45 | .ops = &max8907_mbatt_ops, \ | |
46 | .type = REGULATOR_VOLTAGE, \ | |
47 | .owner = THIS_MODULE, \ | |
48 | } | |
49 | ||
50 | #define REG_LDO(ids, supply, base, min, max, step) \ | |
51 | [MAX8907_##ids] = { \ | |
52 | .name = #ids, \ | |
53 | .supply_name = supply, \ | |
54 | .id = MAX8907_##ids, \ | |
55 | .n_voltages = ((max) - (min)) / (step) + 1, \ | |
56 | .ops = &max8907_ldo_ops, \ | |
57 | .type = REGULATOR_VOLTAGE, \ | |
58 | .owner = THIS_MODULE, \ | |
59 | .min_uV = (min), \ | |
60 | .uV_step = (step), \ | |
61 | .vsel_reg = (base) + MAX8907_VOUT, \ | |
62 | .vsel_mask = 0x3f, \ | |
63 | .enable_reg = (base) + MAX8907_CTL, \ | |
64 | .enable_mask = MAX8907_MASK_LDO_EN, \ | |
65 | } | |
66 | ||
67 | #define REG_FIXED(ids, supply, voltage) \ | |
68 | [MAX8907_##ids] = { \ | |
69 | .name = #ids, \ | |
70 | .supply_name = supply, \ | |
71 | .id = MAX8907_##ids, \ | |
72 | .n_voltages = 1, \ | |
73 | .ops = &max8907_fixed_ops, \ | |
74 | .type = REGULATOR_VOLTAGE, \ | |
75 | .owner = THIS_MODULE, \ | |
76 | .min_uV = (voltage), \ | |
77 | } | |
78 | ||
79 | #define REG_OUT5V(ids, supply, base, voltage) \ | |
80 | [MAX8907_##ids] = { \ | |
81 | .name = #ids, \ | |
82 | .supply_name = supply, \ | |
83 | .id = MAX8907_##ids, \ | |
84 | .n_voltages = 1, \ | |
85 | .ops = &max8907_out5v_ops, \ | |
86 | .type = REGULATOR_VOLTAGE, \ | |
87 | .owner = THIS_MODULE, \ | |
88 | .min_uV = (voltage), \ | |
89 | .enable_reg = (base), \ | |
90 | .enable_mask = MAX8907_MASK_OUT5V_EN, \ | |
91 | } | |
92 | ||
93 | #define REG_BBAT(ids, supply, base, min, max, step) \ | |
94 | [MAX8907_##ids] = { \ | |
95 | .name = #ids, \ | |
96 | .supply_name = supply, \ | |
97 | .id = MAX8907_##ids, \ | |
98 | .n_voltages = ((max) - (min)) / (step) + 1, \ | |
99 | .ops = &max8907_bbat_ops, \ | |
100 | .type = REGULATOR_VOLTAGE, \ | |
101 | .owner = THIS_MODULE, \ | |
102 | .min_uV = (min), \ | |
103 | .uV_step = (step), \ | |
104 | .vsel_reg = (base), \ | |
105 | .vsel_mask = MAX8907_MASK_VBBATTCV, \ | |
106 | } | |
107 | ||
108 | #define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \ | |
109 | 750000, 3900000, 50000) | |
110 | #define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \ | |
111 | 650000, 2225000, 25000) | |
112 | ||
113 | static struct regulator_ops max8907_mbatt_ops = { | |
114 | }; | |
115 | ||
116 | static struct regulator_ops max8907_ldo_ops = { | |
117 | .list_voltage = regulator_list_voltage_linear, | |
118 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
119 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
120 | .enable = regulator_enable_regmap, | |
121 | .disable = regulator_disable_regmap, | |
122 | .is_enabled = regulator_is_enabled_regmap, | |
123 | }; | |
124 | ||
125 | static struct regulator_ops max8907_ldo_hwctl_ops = { | |
126 | .list_voltage = regulator_list_voltage_linear, | |
127 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
128 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
129 | }; | |
130 | ||
131 | static struct regulator_ops max8907_fixed_ops = { | |
132 | .list_voltage = regulator_list_voltage_linear, | |
133 | }; | |
134 | ||
135 | static struct regulator_ops max8907_out5v_ops = { | |
136 | .list_voltage = regulator_list_voltage_linear, | |
137 | .enable = regulator_enable_regmap, | |
138 | .disable = regulator_disable_regmap, | |
139 | .is_enabled = regulator_is_enabled_regmap, | |
140 | }; | |
141 | ||
142 | static struct regulator_ops max8907_out5v_hwctl_ops = { | |
143 | .list_voltage = regulator_list_voltage_linear, | |
144 | }; | |
145 | ||
146 | static struct regulator_ops max8907_bbat_ops = { | |
147 | .list_voltage = regulator_list_voltage_linear, | |
148 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
149 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
150 | }; | |
151 | ||
152 | static struct regulator_desc max8907_regulators[] = { | |
153 | REG_MBATT(), | |
154 | REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000), | |
155 | REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500), | |
156 | REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000), | |
157 | LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1), | |
158 | LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2), | |
159 | LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3), | |
160 | LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4), | |
161 | LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5), | |
162 | LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6), | |
163 | LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7), | |
164 | LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8), | |
165 | LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9), | |
166 | LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10), | |
167 | LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11), | |
168 | LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12), | |
169 | LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13), | |
170 | LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14), | |
171 | LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15), | |
172 | LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16), | |
173 | LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17), | |
174 | LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18), | |
175 | LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19), | |
176 | LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20), | |
177 | REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000), | |
178 | REG_OUT5V(OUT33V, "mbatt", MAX8907_REG_OUT33VEN, 3300000), | |
179 | REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG, | |
180 | 2400000, 3000000, 200000), | |
181 | REG_FIXED(SDBY, "MBATT", 1200000), | |
182 | REG_FIXED(VRTC, "MBATT", 3300000), | |
183 | }; | |
184 | ||
185 | #ifdef CONFIG_OF | |
186 | ||
187 | #define MATCH(_name, _id) \ | |
188 | [MAX8907_##_id] = { \ | |
189 | .name = #_name, \ | |
190 | .driver_data = (void *)&max8907_regulators[MAX8907_##_id], \ | |
191 | } | |
192 | ||
193 | static struct of_regulator_match max8907_matches[] = { | |
194 | MATCH(mbatt, MBATT), | |
195 | MATCH(sd1, SD1), | |
196 | MATCH(sd2, SD2), | |
197 | MATCH(sd3, SD3), | |
198 | MATCH(ldo1, LDO1), | |
199 | MATCH(ldo2, LDO2), | |
200 | MATCH(ldo3, LDO3), | |
201 | MATCH(ldo4, LDO4), | |
202 | MATCH(ldo5, LDO5), | |
203 | MATCH(ldo6, LDO6), | |
204 | MATCH(ldo7, LDO7), | |
205 | MATCH(ldo8, LDO8), | |
206 | MATCH(ldo9, LDO9), | |
207 | MATCH(ldo10, LDO10), | |
208 | MATCH(ldo11, LDO11), | |
209 | MATCH(ldo12, LDO12), | |
210 | MATCH(ldo13, LDO13), | |
211 | MATCH(ldo14, LDO14), | |
212 | MATCH(ldo15, LDO15), | |
213 | MATCH(ldo16, LDO16), | |
214 | MATCH(ldo17, LDO17), | |
215 | MATCH(ldo18, LDO18), | |
216 | MATCH(ldo19, LDO19), | |
217 | MATCH(ldo20, LDO20), | |
218 | MATCH(out5v, OUT5V), | |
219 | MATCH(out33v, OUT33V), | |
220 | MATCH(bbat, BBAT), | |
221 | MATCH(sdby, SDBY), | |
222 | MATCH(vrtc, VRTC), | |
223 | }; | |
224 | ||
225 | static int max8907_regulator_parse_dt(struct platform_device *pdev) | |
226 | { | |
c92f5dd2 | 227 | struct device_node *np, *regulators; |
ffee1909 GY |
228 | int ret; |
229 | ||
c92f5dd2 AL |
230 | np = of_node_get(pdev->dev.parent->of_node); |
231 | if (!np) | |
ffee1909 GY |
232 | return 0; |
233 | ||
234 | regulators = of_find_node_by_name(np, "regulators"); | |
235 | if (!regulators) { | |
236 | dev_err(&pdev->dev, "regulators node not found\n"); | |
237 | return -EINVAL; | |
238 | } | |
239 | ||
f40cbcb9 | 240 | ret = of_regulator_match(&pdev->dev, regulators, max8907_matches, |
ffee1909 | 241 | ARRAY_SIZE(max8907_matches)); |
c92f5dd2 | 242 | of_node_put(regulators); |
ffee1909 GY |
243 | if (ret < 0) { |
244 | dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", | |
245 | ret); | |
246 | return ret; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
db551682 SW |
251 | |
252 | static inline struct regulator_init_data *match_init_data(int index) | |
253 | { | |
254 | return max8907_matches[index].init_data; | |
255 | } | |
256 | ||
257 | static inline struct device_node *match_of_node(int index) | |
258 | { | |
259 | return max8907_matches[index].of_node; | |
260 | } | |
ffee1909 GY |
261 | #else |
262 | static int max8907_regulator_parse_dt(struct platform_device *pdev) | |
263 | { | |
264 | return 0; | |
265 | } | |
db551682 SW |
266 | |
267 | static inline struct regulator_init_data *match_init_data(int index) | |
268 | { | |
269 | return NULL; | |
270 | } | |
271 | ||
272 | static inline struct device_node *match_of_node(int index) | |
273 | { | |
274 | return NULL; | |
275 | } | |
ffee1909 GY |
276 | #endif |
277 | ||
a5023574 | 278 | static int max8907_regulator_probe(struct platform_device *pdev) |
ffee1909 GY |
279 | { |
280 | struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent); | |
281 | struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev); | |
282 | int ret; | |
283 | struct max8907_regulator *pmic; | |
284 | unsigned int val; | |
285 | int i; | |
286 | struct regulator_config config = {}; | |
287 | struct regulator_init_data *idata; | |
288 | const char *mbatt_rail_name = NULL; | |
289 | ||
290 | ret = max8907_regulator_parse_dt(pdev); | |
291 | if (ret) | |
292 | return ret; | |
293 | ||
294 | pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); | |
295 | if (!pmic) { | |
296 | dev_err(&pdev->dev, "Failed to alloc pmic\n"); | |
297 | return -ENOMEM; | |
298 | } | |
299 | platform_set_drvdata(pdev, pmic); | |
300 | ||
301 | memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc)); | |
302 | ||
303 | /* Backwards compatibility with MAX8907B; SD1 uses different voltages */ | |
304 | regmap_read(max8907->regmap_gen, MAX8907_REG_II2RR, &val); | |
305 | if ((val & MAX8907_II2RR_VERSION_MASK) == | |
306 | MAX8907_II2RR_VERSION_REV_B) { | |
307 | pmic->desc[MAX8907_SD1].min_uV = 637500; | |
308 | pmic->desc[MAX8907_SD1].uV_step = 12500; | |
7305608b AL |
309 | pmic->desc[MAX8907_SD1].n_voltages = |
310 | (1425000 - 637500) / 12500 + 1; | |
ffee1909 GY |
311 | } |
312 | ||
313 | for (i = 0; i < MAX8907_NUM_REGULATORS; i++) { | |
314 | config.dev = pdev->dev.parent; | |
315 | if (pdata) | |
316 | idata = pdata->init_data[i]; | |
317 | else | |
db551682 | 318 | idata = match_init_data(i); |
ffee1909 GY |
319 | config.init_data = idata; |
320 | config.driver_data = pmic; | |
321 | config.regmap = max8907->regmap_gen; | |
db551682 | 322 | config.of_node = match_of_node(i); |
ffee1909 GY |
323 | |
324 | switch (pmic->desc[i].id) { | |
325 | case MAX8907_MBATT: | |
5fc72f57 SW |
326 | if (idata && idata->constraints.name) |
327 | mbatt_rail_name = idata->constraints.name; | |
328 | else | |
329 | mbatt_rail_name = pmic->desc[i].name; | |
ffee1909 GY |
330 | break; |
331 | case MAX8907_BBAT: | |
332 | case MAX8907_SDBY: | |
333 | case MAX8907_VRTC: | |
334 | idata->supply_regulator = mbatt_rail_name; | |
335 | break; | |
336 | } | |
337 | ||
338 | if (pmic->desc[i].ops == &max8907_ldo_ops) { | |
339 | regmap_read(config.regmap, pmic->desc[i].enable_reg, | |
340 | &val); | |
341 | if ((val & MAX8907_MASK_LDO_SEQ) != | |
342 | MAX8907_MASK_LDO_SEQ) | |
343 | pmic->desc[i].ops = &max8907_ldo_hwctl_ops; | |
344 | } else if (pmic->desc[i].ops == &max8907_out5v_ops) { | |
345 | regmap_read(config.regmap, pmic->desc[i].enable_reg, | |
346 | &val); | |
347 | if ((val & (MAX8907_MASK_OUT5V_VINEN | | |
348 | MAX8907_MASK_OUT5V_ENSRC)) != | |
349 | MAX8907_MASK_OUT5V_ENSRC) | |
350 | pmic->desc[i].ops = &max8907_out5v_hwctl_ops; | |
351 | } | |
352 | ||
353 | pmic->rdev[i] = regulator_register(&pmic->desc[i], &config); | |
354 | if (IS_ERR(pmic->rdev[i])) { | |
355 | dev_err(&pdev->dev, | |
356 | "failed to register %s regulator\n", | |
357 | pmic->desc[i].name); | |
358 | ret = PTR_ERR(pmic->rdev[i]); | |
359 | goto err_unregister_regulator; | |
360 | } | |
361 | } | |
362 | ||
363 | return 0; | |
364 | ||
365 | err_unregister_regulator: | |
366 | while (--i >= 0) | |
367 | regulator_unregister(pmic->rdev[i]); | |
368 | return ret; | |
369 | } | |
370 | ||
8dc995f5 | 371 | static int max8907_regulator_remove(struct platform_device *pdev) |
ffee1909 | 372 | { |
0764ef59 | 373 | struct max8907_regulator *pmic = platform_get_drvdata(pdev); |
ffee1909 GY |
374 | int i; |
375 | ||
376 | for (i = 0; i < MAX8907_NUM_REGULATORS; i++) | |
377 | regulator_unregister(pmic->rdev[i]); | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static struct platform_driver max8907_regulator_driver = { | |
383 | .driver = { | |
384 | .name = "max8907-regulator", | |
385 | .owner = THIS_MODULE, | |
386 | }, | |
387 | .probe = max8907_regulator_probe, | |
5eb9f2b9 | 388 | .remove = max8907_regulator_remove, |
ffee1909 GY |
389 | }; |
390 | ||
391 | static int __init max8907_regulator_init(void) | |
392 | { | |
393 | return platform_driver_register(&max8907_regulator_driver); | |
394 | } | |
395 | ||
396 | subsys_initcall(max8907_regulator_init); | |
397 | ||
398 | static void __exit max8907_reg_exit(void) | |
399 | { | |
400 | platform_driver_unregister(&max8907_regulator_driver); | |
401 | } | |
402 | ||
403 | module_exit(max8907_reg_exit); | |
404 | ||
405 | MODULE_DESCRIPTION("MAX8907 regulator driver"); | |
406 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>"); | |
407 | MODULE_LICENSE("GPL v2"); | |
d154f0a6 | 408 | MODULE_ALIAS("platform:max8907-regulator"); |