Commit | Line | Data |
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b0902bbe | 1 | /* |
8a82b408 | 2 | * max14577.c - Regulator driver for the Maxim 14577/77836 |
b0902bbe | 3 | * |
4d047d6c | 4 | * Copyright (C) 2013,2014 Samsung Electronics |
b0902bbe KK |
5 | * Krzysztof Kozlowski <k.kozlowski@samsung.com> |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/mfd/max14577.h> | |
22 | #include <linux/mfd/max14577-private.h> | |
23 | #include <linux/regulator/of_regulator.h> | |
24 | ||
b0902bbe KK |
25 | static int max14577_reg_is_enabled(struct regulator_dev *rdev) |
26 | { | |
27 | int rid = rdev_get_id(rdev); | |
28 | struct regmap *rmap = rdev->regmap; | |
29 | u8 reg_data; | |
30 | ||
31 | switch (rid) { | |
32 | case MAX14577_CHARGER: | |
33 | max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, ®_data); | |
34 | if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) | |
35 | return 0; | |
36 | max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data); | |
37 | if ((reg_data & STATUS3_CGMBC_MASK) == 0) | |
38 | return 0; | |
39 | /* MBCHOSTEN and CGMBC are on */ | |
40 | return 1; | |
41 | default: | |
42 | return -EINVAL; | |
43 | } | |
44 | } | |
45 | ||
46 | static int max14577_reg_get_current_limit(struct regulator_dev *rdev) | |
47 | { | |
48 | u8 reg_data; | |
49 | struct regmap *rmap = rdev->regmap; | |
8a82b408 KK |
50 | struct max14577 *max14577 = rdev_get_drvdata(rdev); |
51 | const struct maxim_charger_current *limits = | |
52 | &maxim_charger_currents[max14577->dev_type]; | |
b0902bbe KK |
53 | |
54 | if (rdev_get_id(rdev) != MAX14577_CHARGER) | |
55 | return -EINVAL; | |
56 | ||
57 | max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, ®_data); | |
58 | ||
59 | if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0) | |
8a82b408 | 60 | return limits->min; |
b0902bbe KK |
61 | |
62 | reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >> | |
63 | CHGCTRL4_MBCICHWRCH_SHIFT); | |
8a82b408 | 64 | return limits->high_start + reg_data * limits->high_step; |
b0902bbe KK |
65 | } |
66 | ||
67 | static int max14577_reg_set_current_limit(struct regulator_dev *rdev, | |
68 | int min_uA, int max_uA) | |
69 | { | |
b0902bbe | 70 | u8 reg_data; |
b8f139f6 | 71 | int ret; |
8a82b408 KK |
72 | struct max14577 *max14577 = rdev_get_drvdata(rdev); |
73 | const struct maxim_charger_current *limits = | |
74 | &maxim_charger_currents[max14577->dev_type]; | |
b0902bbe KK |
75 | |
76 | if (rdev_get_id(rdev) != MAX14577_CHARGER) | |
77 | return -EINVAL; | |
78 | ||
b8f139f6 KK |
79 | ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, ®_data); |
80 | if (ret) | |
81 | return ret; | |
b0902bbe KK |
82 | |
83 | return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4, | |
84 | CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK, | |
85 | reg_data); | |
86 | } | |
87 | ||
88 | static struct regulator_ops max14577_safeout_ops = { | |
89 | .is_enabled = regulator_is_enabled_regmap, | |
90 | .enable = regulator_enable_regmap, | |
91 | .disable = regulator_disable_regmap, | |
92 | .list_voltage = regulator_list_voltage_linear, | |
93 | }; | |
94 | ||
95 | static struct regulator_ops max14577_charger_ops = { | |
96 | .is_enabled = max14577_reg_is_enabled, | |
97 | .enable = regulator_enable_regmap, | |
98 | .disable = regulator_disable_regmap, | |
99 | .get_current_limit = max14577_reg_get_current_limit, | |
100 | .set_current_limit = max14577_reg_set_current_limit, | |
101 | }; | |
102 | ||
8a82b408 | 103 | static const struct regulator_desc max14577_supported_regulators[] = { |
b0902bbe KK |
104 | [MAX14577_SAFEOUT] = { |
105 | .name = "SAFEOUT", | |
e951ceef BS |
106 | .of_match = of_match_ptr("SAFEOUT"), |
107 | .regulators_node = of_match_ptr("regulators"), | |
b0902bbe KK |
108 | .id = MAX14577_SAFEOUT, |
109 | .ops = &max14577_safeout_ops, | |
110 | .type = REGULATOR_VOLTAGE, | |
111 | .owner = THIS_MODULE, | |
112 | .n_voltages = 1, | |
113 | .min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, | |
114 | .enable_reg = MAX14577_REG_CONTROL2, | |
115 | .enable_mask = CTRL2_SFOUTORD_MASK, | |
116 | }, | |
117 | [MAX14577_CHARGER] = { | |
118 | .name = "CHARGER", | |
e951ceef BS |
119 | .of_match = of_match_ptr("CHARGER"), |
120 | .regulators_node = of_match_ptr("regulators"), | |
b0902bbe KK |
121 | .id = MAX14577_CHARGER, |
122 | .ops = &max14577_charger_ops, | |
123 | .type = REGULATOR_CURRENT, | |
124 | .owner = THIS_MODULE, | |
125 | .enable_reg = MAX14577_CHG_REG_CHG_CTRL2, | |
126 | .enable_mask = CHGCTRL2_MBCHOSTEN_MASK, | |
127 | }, | |
128 | }; | |
129 | ||
8a82b408 KK |
130 | static struct regulator_ops max77836_ldo_ops = { |
131 | .is_enabled = regulator_is_enabled_regmap, | |
132 | .enable = regulator_enable_regmap, | |
133 | .disable = regulator_disable_regmap, | |
134 | .list_voltage = regulator_list_voltage_linear, | |
135 | .map_voltage = regulator_map_voltage_linear, | |
136 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
137 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
138 | /* TODO: add .set_suspend_mode */ | |
139 | }; | |
140 | ||
141 | static const struct regulator_desc max77836_supported_regulators[] = { | |
142 | [MAX14577_SAFEOUT] = { | |
143 | .name = "SAFEOUT", | |
e951ceef BS |
144 | .of_match = of_match_ptr("SAFEOUT"), |
145 | .regulators_node = of_match_ptr("regulators"), | |
8a82b408 KK |
146 | .id = MAX14577_SAFEOUT, |
147 | .ops = &max14577_safeout_ops, | |
148 | .type = REGULATOR_VOLTAGE, | |
149 | .owner = THIS_MODULE, | |
150 | .n_voltages = 1, | |
151 | .min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, | |
152 | .enable_reg = MAX14577_REG_CONTROL2, | |
153 | .enable_mask = CTRL2_SFOUTORD_MASK, | |
154 | }, | |
155 | [MAX14577_CHARGER] = { | |
156 | .name = "CHARGER", | |
e951ceef BS |
157 | .of_match = of_match_ptr("CHARGER"), |
158 | .regulators_node = of_match_ptr("regulators"), | |
8a82b408 KK |
159 | .id = MAX14577_CHARGER, |
160 | .ops = &max14577_charger_ops, | |
161 | .type = REGULATOR_CURRENT, | |
162 | .owner = THIS_MODULE, | |
163 | .enable_reg = MAX14577_CHG_REG_CHG_CTRL2, | |
164 | .enable_mask = CHGCTRL2_MBCHOSTEN_MASK, | |
165 | }, | |
166 | [MAX77836_LDO1] = { | |
167 | .name = "LDO1", | |
e951ceef BS |
168 | .of_match = of_match_ptr("LDO1"), |
169 | .regulators_node = of_match_ptr("regulators"), | |
8a82b408 KK |
170 | .id = MAX77836_LDO1, |
171 | .ops = &max77836_ldo_ops, | |
172 | .type = REGULATOR_VOLTAGE, | |
173 | .owner = THIS_MODULE, | |
174 | .n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, | |
175 | .min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, | |
176 | .uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, | |
177 | .enable_reg = MAX77836_LDO_REG_CNFG1_LDO1, | |
178 | .enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, | |
179 | .vsel_reg = MAX77836_LDO_REG_CNFG1_LDO1, | |
180 | .vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, | |
181 | }, | |
182 | [MAX77836_LDO2] = { | |
183 | .name = "LDO2", | |
e951ceef BS |
184 | .of_match = of_match_ptr("LDO2"), |
185 | .regulators_node = of_match_ptr("regulators"), | |
8a82b408 KK |
186 | .id = MAX77836_LDO2, |
187 | .ops = &max77836_ldo_ops, | |
188 | .type = REGULATOR_VOLTAGE, | |
189 | .owner = THIS_MODULE, | |
190 | .n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, | |
191 | .min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, | |
192 | .uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, | |
193 | .enable_reg = MAX77836_LDO_REG_CNFG1_LDO2, | |
194 | .enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, | |
195 | .vsel_reg = MAX77836_LDO_REG_CNFG1_LDO2, | |
196 | .vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, | |
197 | }, | |
198 | }; | |
199 | ||
b0902bbe KK |
200 | #ifdef CONFIG_OF |
201 | static struct of_regulator_match max14577_regulator_matches[] = { | |
202 | { .name = "SAFEOUT", }, | |
203 | { .name = "CHARGER", }, | |
204 | }; | |
205 | ||
8a82b408 KK |
206 | static struct of_regulator_match max77836_regulator_matches[] = { |
207 | { .name = "SAFEOUT", }, | |
208 | { .name = "CHARGER", }, | |
209 | { .name = "LDO1", }, | |
210 | { .name = "LDO2", }, | |
211 | }; | |
212 | ||
8a82b408 KK |
213 | static inline struct regulator_init_data *match_init_data(int index, |
214 | enum maxim_device_type dev_type) | |
b0902bbe | 215 | { |
8a82b408 KK |
216 | switch (dev_type) { |
217 | case MAXIM_DEVICE_TYPE_MAX77836: | |
218 | return max77836_regulator_matches[index].init_data; | |
219 | ||
220 | case MAXIM_DEVICE_TYPE_MAX14577: | |
221 | default: | |
222 | return max14577_regulator_matches[index].init_data; | |
223 | } | |
b0902bbe KK |
224 | } |
225 | ||
8a82b408 KK |
226 | static inline struct device_node *match_of_node(int index, |
227 | enum maxim_device_type dev_type) | |
b0902bbe | 228 | { |
8a82b408 KK |
229 | switch (dev_type) { |
230 | case MAXIM_DEVICE_TYPE_MAX77836: | |
231 | return max77836_regulator_matches[index].of_node; | |
232 | ||
233 | case MAXIM_DEVICE_TYPE_MAX14577: | |
234 | default: | |
235 | return max14577_regulator_matches[index].of_node; | |
236 | } | |
b0902bbe KK |
237 | } |
238 | #else /* CONFIG_OF */ | |
8a82b408 KK |
239 | static inline struct regulator_init_data *match_init_data(int index, |
240 | enum maxim_device_type dev_type) | |
b0902bbe KK |
241 | { |
242 | return NULL; | |
243 | } | |
244 | ||
8a82b408 KK |
245 | static inline struct device_node *match_of_node(int index, |
246 | enum maxim_device_type dev_type) | |
b0902bbe KK |
247 | { |
248 | return NULL; | |
249 | } | |
250 | #endif /* CONFIG_OF */ | |
251 | ||
8a82b408 KK |
252 | /** |
253 | * Registers for regulators of max77836 use different I2C slave addresses so | |
254 | * different regmaps must be used for them. | |
255 | * | |
256 | * Returns proper regmap for accessing regulator passed by id. | |
257 | */ | |
258 | static struct regmap *max14577_get_regmap(struct max14577 *max14577, | |
259 | int reg_id) | |
260 | { | |
261 | switch (max14577->dev_type) { | |
262 | case MAXIM_DEVICE_TYPE_MAX77836: | |
263 | switch (reg_id) { | |
264 | case MAX77836_SAFEOUT ... MAX77836_CHARGER: | |
265 | return max14577->regmap; | |
266 | default: | |
267 | /* MAX77836_LDO1 ... MAX77836_LDO2 */ | |
268 | return max14577->regmap_pmic; | |
269 | } | |
270 | ||
271 | case MAXIM_DEVICE_TYPE_MAX14577: | |
272 | default: | |
273 | return max14577->regmap; | |
274 | } | |
275 | } | |
b0902bbe KK |
276 | |
277 | static int max14577_regulator_probe(struct platform_device *pdev) | |
278 | { | |
279 | struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); | |
280 | struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev); | |
e951ceef | 281 | int i, ret = 0; |
b0902bbe | 282 | struct regulator_config config = {}; |
8a82b408 KK |
283 | const struct regulator_desc *supported_regulators; |
284 | unsigned int supported_regulators_size; | |
285 | enum maxim_device_type dev_type = max14577->dev_type; | |
b0902bbe | 286 | |
8a82b408 KK |
287 | switch (dev_type) { |
288 | case MAXIM_DEVICE_TYPE_MAX77836: | |
289 | supported_regulators = max77836_supported_regulators; | |
290 | supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators); | |
291 | break; | |
292 | case MAXIM_DEVICE_TYPE_MAX14577: | |
293 | default: | |
294 | supported_regulators = max14577_supported_regulators; | |
295 | supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators); | |
296 | } | |
297 | ||
e951ceef | 298 | config.dev = max14577->dev; |
8a82b408 | 299 | config.driver_data = max14577; |
b0902bbe | 300 | |
8a82b408 | 301 | for (i = 0; i < supported_regulators_size; i++) { |
b0902bbe KK |
302 | struct regulator_dev *regulator; |
303 | /* | |
304 | * Index of supported_regulators[] is also the id and must | |
305 | * match index of pdata->regulators[]. | |
306 | */ | |
307 | if (pdata && pdata->regulators) { | |
308 | config.init_data = pdata->regulators[i].initdata; | |
309 | config.of_node = pdata->regulators[i].of_node; | |
310 | } else { | |
8a82b408 KK |
311 | config.init_data = match_init_data(i, dev_type); |
312 | config.of_node = match_of_node(i, dev_type); | |
b0902bbe | 313 | } |
8a82b408 KK |
314 | config.regmap = max14577_get_regmap(max14577, |
315 | supported_regulators[i].id); | |
b0902bbe KK |
316 | |
317 | regulator = devm_regulator_register(&pdev->dev, | |
318 | &supported_regulators[i], &config); | |
319 | if (IS_ERR(regulator)) { | |
320 | ret = PTR_ERR(regulator); | |
321 | dev_err(&pdev->dev, | |
8a82b408 KK |
322 | "Regulator init failed for %d/%s with error: %d\n", |
323 | i, supported_regulators[i].name, ret); | |
b0902bbe KK |
324 | return ret; |
325 | } | |
326 | } | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
8a82b408 KK |
331 | static const struct platform_device_id max14577_regulator_id[] = { |
332 | { "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, }, | |
333 | { "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, }, | |
334 | { } | |
335 | }; | |
336 | MODULE_DEVICE_TABLE(platform, max14577_regulator_id); | |
337 | ||
b0902bbe KK |
338 | static struct platform_driver max14577_regulator_driver = { |
339 | .driver = { | |
b0902bbe KK |
340 | .name = "max14577-regulator", |
341 | }, | |
8a82b408 KK |
342 | .probe = max14577_regulator_probe, |
343 | .id_table = max14577_regulator_id, | |
b0902bbe KK |
344 | }; |
345 | ||
346 | static int __init max14577_regulator_init(void) | |
347 | { | |
8a82b408 KK |
348 | BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM); |
349 | BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM); | |
350 | ||
351 | BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN + | |
352 | (MAX77836_REGULATOR_LDO_VOLTAGE_STEP * | |
353 | (MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) != | |
354 | MAX77836_REGULATOR_LDO_VOLTAGE_MAX); | |
b0902bbe KK |
355 | |
356 | return platform_driver_register(&max14577_regulator_driver); | |
357 | } | |
358 | subsys_initcall(max14577_regulator_init); | |
359 | ||
360 | static void __exit max14577_regulator_exit(void) | |
361 | { | |
362 | platform_driver_unregister(&max14577_regulator_driver); | |
363 | } | |
364 | module_exit(max14577_regulator_exit); | |
365 | ||
366 | MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>"); | |
8a82b408 | 367 | MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver"); |
b0902bbe | 368 | MODULE_LICENSE("GPL"); |
9f45a3dd | 369 | MODULE_ALIAS("platform:max14577-regulator"); |