1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * max8907-regulator.c -- support regulators in max8907 |
4 | * |
5 | * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com> |
6 | * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved. |
7 | * |
8 | * Portions based on drivers/regulator/tps65910-regulator.c, |
9 | * Copyright 2010 Texas Instruments Inc. |
10 | * Author: Graeme Gregory <gg@slimlogic.co.uk> |
11 | * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> |
12 | */ |
13 | |
14 | #include <linux/err.h> |
15 | #include <linux/init.h> |
16 | #include <linux/mfd/core.h> |
17 | #include <linux/mfd/max8907.h> |
18 | #include <linux/module.h> |
19 | #include <linux/of.h> |
20 | #include <linux/platform_device.h> |
21 | #include <linux/regulator/driver.h> |
22 | #include <linux/regulator/machine.h> |
23 | #include <linux/regulator/of_regulator.h> |
24 | #include <linux/regmap.h> |
25 | #include <linux/slab.h> |
26 | |
27 | #define MAX8907_II2RR_VERSION_MASK 0xF0 |
28 | #define MAX8907_II2RR_VERSION_REV_A 0x00 |
29 | #define MAX8907_II2RR_VERSION_REV_B 0x10 |
30 | #define MAX8907_II2RR_VERSION_REV_C 0x30 |
31 | |
32 | struct max8907_regulator { |
33 | struct regulator_desc desc[MAX8907_NUM_REGULATORS]; |
34 | }; |
35 | |
36 | #define REG_MBATT() \ |
37 | [MAX8907_MBATT] = { \ |
38 | .name = "MBATT", \ |
39 | .supply_name = "mbatt", \ |
40 | .id = MAX8907_MBATT, \ |
41 | .ops = &max8907_mbatt_ops, \ |
42 | .type = REGULATOR_VOLTAGE, \ |
43 | .owner = THIS_MODULE, \ |
44 | } |
45 | |
46 | #define REG_LDO(ids, supply, base, min, max, step) \ |
47 | [MAX8907_##ids] = { \ |
48 | .name = #ids, \ |
49 | .supply_name = supply, \ |
50 | .id = MAX8907_##ids, \ |
51 | .n_voltages = ((max) - (min)) / (step) + 1, \ |
52 | .ops = &max8907_ldo_ops, \ |
53 | .type = REGULATOR_VOLTAGE, \ |
54 | .owner = THIS_MODULE, \ |
55 | .min_uV = (min), \ |
56 | .uV_step = (step), \ |
57 | .vsel_reg = (base) + MAX8907_VOUT, \ |
58 | .vsel_mask = 0x3f, \ |
59 | .enable_reg = (base) + MAX8907_CTL, \ |
60 | .enable_mask = MAX8907_MASK_LDO_EN, \ |
61 | } |
62 | |
63 | #define REG_FIXED(ids, supply, voltage) \ |
64 | [MAX8907_##ids] = { \ |
65 | .name = #ids, \ |
66 | .supply_name = supply, \ |
67 | .id = MAX8907_##ids, \ |
68 | .n_voltages = 1, \ |
69 | .ops = &max8907_fixed_ops, \ |
70 | .type = REGULATOR_VOLTAGE, \ |
71 | .owner = THIS_MODULE, \ |
72 | .min_uV = (voltage), \ |
73 | } |
74 | |
75 | #define REG_OUT5V(ids, supply, base, voltage) \ |
76 | [MAX8907_##ids] = { \ |
77 | .name = #ids, \ |
78 | .supply_name = supply, \ |
79 | .id = MAX8907_##ids, \ |
80 | .n_voltages = 1, \ |
81 | .ops = &max8907_out5v_ops, \ |
82 | .type = REGULATOR_VOLTAGE, \ |
83 | .owner = THIS_MODULE, \ |
84 | .min_uV = (voltage), \ |
85 | .enable_reg = (base), \ |
86 | .enable_mask = MAX8907_MASK_OUT5V_EN, \ |
87 | } |
88 | |
89 | #define REG_BBAT(ids, supply, base, min, max, step) \ |
90 | [MAX8907_##ids] = { \ |
91 | .name = #ids, \ |
92 | .supply_name = supply, \ |
93 | .id = MAX8907_##ids, \ |
94 | .n_voltages = ((max) - (min)) / (step) + 1, \ |
95 | .ops = &max8907_bbat_ops, \ |
96 | .type = REGULATOR_VOLTAGE, \ |
97 | .owner = THIS_MODULE, \ |
98 | .min_uV = (min), \ |
99 | .uV_step = (step), \ |
100 | .vsel_reg = (base), \ |
101 | .vsel_mask = MAX8907_MASK_VBBATTCV, \ |
102 | } |
103 | |
104 | #define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \ |
105 | 750000, 3900000, 50000) |
106 | #define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \ |
107 | 650000, 2225000, 25000) |
108 | |
109 | static const struct regulator_ops max8907_mbatt_ops = { |
110 | }; |
111 | |
112 | static const struct regulator_ops max8907_ldo_ops = { |
113 | .list_voltage = regulator_list_voltage_linear, |
114 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
115 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
116 | .enable = regulator_enable_regmap, |
117 | .disable = regulator_disable_regmap, |
118 | .is_enabled = regulator_is_enabled_regmap, |
119 | }; |
120 | |
121 | static const struct regulator_ops max8907_ldo_hwctl_ops = { |
122 | .list_voltage = regulator_list_voltage_linear, |
123 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
124 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
125 | }; |
126 | |
127 | static const struct regulator_ops max8907_fixed_ops = { |
128 | .list_voltage = regulator_list_voltage_linear, |
129 | }; |
130 | |
131 | static const struct regulator_ops max8907_out5v_ops = { |
132 | .list_voltage = regulator_list_voltage_linear, |
133 | .enable = regulator_enable_regmap, |
134 | .disable = regulator_disable_regmap, |
135 | .is_enabled = regulator_is_enabled_regmap, |
136 | }; |
137 | |
138 | static const struct regulator_ops max8907_out5v_hwctl_ops = { |
139 | .list_voltage = regulator_list_voltage_linear, |
140 | }; |
141 | |
142 | static const struct regulator_ops max8907_bbat_ops = { |
143 | .list_voltage = regulator_list_voltage_linear, |
144 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
145 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
146 | }; |
147 | |
148 | static const struct regulator_desc max8907_regulators[] = { |
149 | REG_MBATT(), |
150 | REG_LDO(SD1, "in-v1" , MAX8907_REG_SDCTL1, 650000, 2225000, 25000), |
151 | REG_LDO(SD2, "in-v2" , MAX8907_REG_SDCTL2, 637500, 1425000, 12500), |
152 | REG_LDO(SD3, "in-v3" , MAX8907_REG_SDCTL3, 750000, 3900000, 50000), |
153 | LDO_750_50(LDO1, "in1" , MAX8907_REG_LDOCTL1), |
154 | LDO_650_25(LDO2, "in2" , MAX8907_REG_LDOCTL2), |
155 | LDO_650_25(LDO3, "in3" , MAX8907_REG_LDOCTL3), |
156 | LDO_750_50(LDO4, "in4" , MAX8907_REG_LDOCTL4), |
157 | LDO_750_50(LDO5, "in5" , MAX8907_REG_LDOCTL5), |
158 | LDO_750_50(LDO6, "in6" , MAX8907_REG_LDOCTL6), |
159 | LDO_750_50(LDO7, "in7" , MAX8907_REG_LDOCTL7), |
160 | LDO_750_50(LDO8, "in8" , MAX8907_REG_LDOCTL8), |
161 | LDO_750_50(LDO9, "in9" , MAX8907_REG_LDOCTL9), |
162 | LDO_750_50(LDO10, "in10" , MAX8907_REG_LDOCTL10), |
163 | LDO_750_50(LDO11, "in11" , MAX8907_REG_LDOCTL11), |
164 | LDO_750_50(LDO12, "in12" , MAX8907_REG_LDOCTL12), |
165 | LDO_750_50(LDO13, "in13" , MAX8907_REG_LDOCTL13), |
166 | LDO_750_50(LDO14, "in14" , MAX8907_REG_LDOCTL14), |
167 | LDO_750_50(LDO15, "in15" , MAX8907_REG_LDOCTL15), |
168 | LDO_750_50(LDO16, "in16" , MAX8907_REG_LDOCTL16), |
169 | LDO_650_25(LDO17, "in17" , MAX8907_REG_LDOCTL17), |
170 | LDO_650_25(LDO18, "in18" , MAX8907_REG_LDOCTL18), |
171 | LDO_750_50(LDO19, "in19" , MAX8907_REG_LDOCTL19), |
172 | LDO_750_50(LDO20, "in20" , MAX8907_REG_LDOCTL20), |
173 | REG_OUT5V(OUT5V, "mbatt" , MAX8907_REG_OUT5VEN, 5000000), |
174 | REG_OUT5V(OUT33V, "mbatt" , MAX8907_REG_OUT33VEN, 3300000), |
175 | REG_BBAT(BBAT, "MBATT" , MAX8907_REG_BBAT_CNFG, |
176 | 2400000, 3000000, 200000), |
177 | REG_FIXED(SDBY, "MBATT" , 1200000), |
178 | REG_FIXED(VRTC, "MBATT" , 3300000), |
179 | }; |
180 | |
181 | #ifdef CONFIG_OF |
182 | |
183 | #define MATCH(_name, _id) \ |
184 | [MAX8907_##_id] = { \ |
185 | .name = #_name, \ |
186 | .driver_data = (void *)&max8907_regulators[MAX8907_##_id], \ |
187 | } |
188 | |
189 | static struct of_regulator_match max8907_matches[] = { |
190 | MATCH(mbatt, MBATT), |
191 | MATCH(sd1, SD1), |
192 | MATCH(sd2, SD2), |
193 | MATCH(sd3, SD3), |
194 | MATCH(ldo1, LDO1), |
195 | MATCH(ldo2, LDO2), |
196 | MATCH(ldo3, LDO3), |
197 | MATCH(ldo4, LDO4), |
198 | MATCH(ldo5, LDO5), |
199 | MATCH(ldo6, LDO6), |
200 | MATCH(ldo7, LDO7), |
201 | MATCH(ldo8, LDO8), |
202 | MATCH(ldo9, LDO9), |
203 | MATCH(ldo10, LDO10), |
204 | MATCH(ldo11, LDO11), |
205 | MATCH(ldo12, LDO12), |
206 | MATCH(ldo13, LDO13), |
207 | MATCH(ldo14, LDO14), |
208 | MATCH(ldo15, LDO15), |
209 | MATCH(ldo16, LDO16), |
210 | MATCH(ldo17, LDO17), |
211 | MATCH(ldo18, LDO18), |
212 | MATCH(ldo19, LDO19), |
213 | MATCH(ldo20, LDO20), |
214 | MATCH(out5v, OUT5V), |
215 | MATCH(out33v, OUT33V), |
216 | MATCH(bbat, BBAT), |
217 | MATCH(sdby, SDBY), |
218 | MATCH(vrtc, VRTC), |
219 | }; |
220 | |
221 | static int max8907_regulator_parse_dt(struct platform_device *pdev) |
222 | { |
223 | struct device_node *np, *regulators; |
224 | int ret; |
225 | |
226 | np = pdev->dev.parent->of_node; |
227 | if (!np) |
228 | return 0; |
229 | |
230 | regulators = of_get_child_by_name(node: np, name: "regulators" ); |
231 | if (!regulators) { |
232 | dev_err(&pdev->dev, "regulators node not found\n" ); |
233 | return -EINVAL; |
234 | } |
235 | |
236 | ret = of_regulator_match(dev: &pdev->dev, node: regulators, matches: max8907_matches, |
237 | ARRAY_SIZE(max8907_matches)); |
238 | of_node_put(node: regulators); |
239 | if (ret < 0) { |
240 | dev_err(&pdev->dev, "Error parsing regulator init data: %d\n" , |
241 | ret); |
242 | return ret; |
243 | } |
244 | |
245 | return 0; |
246 | } |
247 | |
248 | static inline struct regulator_init_data *match_init_data(int index) |
249 | { |
250 | return max8907_matches[index].init_data; |
251 | } |
252 | |
253 | static inline struct device_node *match_of_node(int index) |
254 | { |
255 | return max8907_matches[index].of_node; |
256 | } |
257 | #else |
258 | static int max8907_regulator_parse_dt(struct platform_device *pdev) |
259 | { |
260 | return 0; |
261 | } |
262 | |
263 | static inline struct regulator_init_data *match_init_data(int index) |
264 | { |
265 | return NULL; |
266 | } |
267 | |
268 | static inline struct device_node *match_of_node(int index) |
269 | { |
270 | return NULL; |
271 | } |
272 | #endif |
273 | |
274 | static int max8907_regulator_probe(struct platform_device *pdev) |
275 | { |
276 | struct max8907 *max8907 = dev_get_drvdata(dev: pdev->dev.parent); |
277 | struct max8907_platform_data *pdata = dev_get_platdata(dev: max8907->dev); |
278 | int ret; |
279 | struct max8907_regulator *pmic; |
280 | unsigned int val; |
281 | int i; |
282 | struct regulator_config config = {}; |
283 | struct regulator_init_data *idata; |
284 | const char *mbatt_rail_name = NULL; |
285 | |
286 | ret = max8907_regulator_parse_dt(pdev); |
287 | if (ret) |
288 | return ret; |
289 | |
290 | pmic = devm_kzalloc(dev: &pdev->dev, size: sizeof(*pmic), GFP_KERNEL); |
291 | if (!pmic) |
292 | return -ENOMEM; |
293 | |
294 | platform_set_drvdata(pdev, data: pmic); |
295 | |
296 | memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc)); |
297 | |
298 | /* Backwards compatibility with MAX8907B; SD1 uses different voltages */ |
299 | ret = regmap_read(map: max8907->regmap_gen, MAX8907_REG_II2RR, val: &val); |
300 | if (ret) |
301 | return ret; |
302 | |
303 | if ((val & MAX8907_II2RR_VERSION_MASK) == |
304 | MAX8907_II2RR_VERSION_REV_B) { |
305 | pmic->desc[MAX8907_SD1].min_uV = 637500; |
306 | pmic->desc[MAX8907_SD1].uV_step = 12500; |
307 | pmic->desc[MAX8907_SD1].n_voltages = |
308 | (1425000 - 637500) / 12500 + 1; |
309 | } |
310 | |
311 | for (i = 0; i < MAX8907_NUM_REGULATORS; i++) { |
312 | struct regulator_dev *rdev; |
313 | |
314 | config.dev = pdev->dev.parent; |
315 | if (pdata) |
316 | idata = pdata->init_data[i]; |
317 | else |
318 | idata = match_init_data(index: i); |
319 | config.init_data = idata; |
320 | config.driver_data = pmic; |
321 | config.regmap = max8907->regmap_gen; |
322 | config.of_node = match_of_node(index: i); |
323 | |
324 | switch (pmic->desc[i].id) { |
325 | case MAX8907_MBATT: |
326 | if (idata && idata->constraints.name) |
327 | mbatt_rail_name = idata->constraints.name; |
328 | else |
329 | mbatt_rail_name = pmic->desc[i].name; |
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 | ret = regmap_read(map: config.regmap, reg: pmic->desc[i].enable_reg, |
340 | val: &val); |
341 | if (ret) |
342 | return ret; |
343 | |
344 | if ((val & MAX8907_MASK_LDO_SEQ) != |
345 | MAX8907_MASK_LDO_SEQ) |
346 | pmic->desc[i].ops = &max8907_ldo_hwctl_ops; |
347 | } else if (pmic->desc[i].ops == &max8907_out5v_ops) { |
348 | ret = regmap_read(map: config.regmap, reg: pmic->desc[i].enable_reg, |
349 | val: &val); |
350 | if (ret) |
351 | return ret; |
352 | |
353 | if ((val & (MAX8907_MASK_OUT5V_VINEN | |
354 | MAX8907_MASK_OUT5V_ENSRC)) != |
355 | MAX8907_MASK_OUT5V_ENSRC) |
356 | pmic->desc[i].ops = &max8907_out5v_hwctl_ops; |
357 | } |
358 | |
359 | rdev = devm_regulator_register(dev: &pdev->dev, |
360 | regulator_desc: &pmic->desc[i], config: &config); |
361 | if (IS_ERR(ptr: rdev)) { |
362 | dev_err(&pdev->dev, |
363 | "failed to register %s regulator\n" , |
364 | pmic->desc[i].name); |
365 | return PTR_ERR(ptr: rdev); |
366 | } |
367 | } |
368 | |
369 | return 0; |
370 | } |
371 | |
372 | static struct platform_driver max8907_regulator_driver = { |
373 | .driver = { |
374 | .name = "max8907-regulator" , |
375 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
376 | }, |
377 | .probe = max8907_regulator_probe, |
378 | }; |
379 | |
380 | static int __init max8907_regulator_init(void) |
381 | { |
382 | return platform_driver_register(&max8907_regulator_driver); |
383 | } |
384 | |
385 | subsys_initcall(max8907_regulator_init); |
386 | |
387 | static void __exit max8907_reg_exit(void) |
388 | { |
389 | platform_driver_unregister(&max8907_regulator_driver); |
390 | } |
391 | |
392 | module_exit(max8907_reg_exit); |
393 | |
394 | MODULE_DESCRIPTION("MAX8907 regulator driver" ); |
395 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>" ); |
396 | MODULE_LICENSE("GPL v2" ); |
397 | MODULE_ALIAS("platform:max8907-regulator" ); |
398 | |