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80b022e2 | 1 | /* |
9e9a08e8 | 2 | * max77693.c - Regulator driver for the Maxim 77693 and 77843 |
80b022e2 | 3 | * |
9e9a08e8 | 4 | * Copyright (C) 2013-2015 Samsung Electronics |
80b022e2 | 5 | * Jonghwa Lee <jonghwa3.lee@samsung.com> |
9e9a08e8 | 6 | * Krzysztof Kozlowski <k.kozlowski.k@gmail.com> |
80b022e2 JL |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | * This driver is based on max77686.c | |
23 | */ | |
24 | ||
25 | #include <linux/err.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/export.h> | |
30 | #include <linux/regulator/driver.h> | |
31 | #include <linux/regulator/machine.h> | |
32 | #include <linux/mfd/max77693.h> | |
61b305cd | 33 | #include <linux/mfd/max77693-common.h> |
80b022e2 | 34 | #include <linux/mfd/max77693-private.h> |
9e9a08e8 | 35 | #include <linux/mfd/max77843-private.h> |
80b022e2 | 36 | #include <linux/regulator/of_regulator.h> |
d0540f91 | 37 | #include <linux/regmap.h> |
80b022e2 | 38 | |
9e9a08e8 KK |
39 | /* |
40 | * ID for MAX77843 regulators. | |
41 | * There is no need for such for MAX77693. | |
42 | */ | |
43 | enum max77843_regulator_type { | |
44 | MAX77843_SAFEOUT1 = 0, | |
45 | MAX77843_SAFEOUT2, | |
46 | MAX77843_CHARGER, | |
47 | ||
48 | MAX77843_NUM, | |
49 | }; | |
50 | ||
51 | /* Register differences between chargers: MAX77693 and MAX77843 */ | |
5b5e771f KK |
52 | struct chg_reg_data { |
53 | unsigned int linear_reg; | |
54 | unsigned int linear_mask; | |
55 | unsigned int uA_step; | |
56 | unsigned int min_sel; | |
57 | }; | |
80b022e2 | 58 | |
80b022e2 | 59 | /* |
9e9a08e8 | 60 | * MAX77693 CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA |
80b022e2 JL |
61 | * 0x00, 0x01, 0x2, 0x03 = 60 mA |
62 | * 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA | |
9e9a08e8 KK |
63 | * Actually for MAX77693 the driver manipulates the maximum input current, |
64 | * not the fast charge current (output). This should be fixed. | |
65 | * | |
66 | * On MAX77843 the calculation formula is the same (except values). | |
67 | * Fortunately it properly manipulates the fast charge current. | |
80b022e2 JL |
68 | */ |
69 | static int max77693_chg_get_current_limit(struct regulator_dev *rdev) | |
70 | { | |
5b5e771f | 71 | const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev); |
80b022e2 JL |
72 | unsigned int chg_min_uA = rdev->constraints->min_uA; |
73 | unsigned int chg_max_uA = rdev->constraints->max_uA; | |
d0540f91 | 74 | unsigned int reg, sel; |
80b022e2 JL |
75 | unsigned int val; |
76 | int ret; | |
77 | ||
5b5e771f | 78 | ret = regmap_read(rdev->regmap, reg_data->linear_reg, ®); |
80b022e2 JL |
79 | if (ret < 0) |
80 | return ret; | |
81 | ||
5b5e771f | 82 | sel = reg & reg_data->linear_mask; |
80b022e2 JL |
83 | |
84 | /* the first four codes for charger current are all 60mA */ | |
5b5e771f | 85 | if (sel <= reg_data->min_sel) |
80b022e2 JL |
86 | sel = 0; |
87 | else | |
5b5e771f | 88 | sel -= reg_data->min_sel; |
80b022e2 | 89 | |
5b5e771f | 90 | val = chg_min_uA + reg_data->uA_step * sel; |
80b022e2 JL |
91 | if (val > chg_max_uA) |
92 | return -EINVAL; | |
93 | ||
94 | return val; | |
95 | } | |
96 | ||
97 | static int max77693_chg_set_current_limit(struct regulator_dev *rdev, | |
98 | int min_uA, int max_uA) | |
99 | { | |
5b5e771f | 100 | const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev); |
80b022e2 JL |
101 | unsigned int chg_min_uA = rdev->constraints->min_uA; |
102 | int sel = 0; | |
103 | ||
5b5e771f | 104 | while (chg_min_uA + reg_data->uA_step * sel < min_uA) |
80b022e2 JL |
105 | sel++; |
106 | ||
5b5e771f | 107 | if (chg_min_uA + reg_data->uA_step * sel > max_uA) |
80b022e2 JL |
108 | return -EINVAL; |
109 | ||
110 | /* the first four codes for charger current are all 60mA */ | |
5b5e771f | 111 | sel += reg_data->min_sel; |
80b022e2 | 112 | |
5b5e771f | 113 | return regmap_write(rdev->regmap, reg_data->linear_reg, sel); |
80b022e2 JL |
114 | } |
115 | /* end of CHARGER regulator ops */ | |
116 | ||
9e9a08e8 KK |
117 | /* Returns regmap suitable for given regulator on chosen device */ |
118 | static struct regmap *max77693_get_regmap(enum max77693_types type, | |
119 | struct max77693_dev *max77693, | |
120 | int reg_id) | |
121 | { | |
122 | if (type == TYPE_MAX77693) | |
123 | return max77693->regmap; | |
124 | ||
125 | /* Else: TYPE_MAX77843 */ | |
126 | switch (reg_id) { | |
127 | case MAX77843_SAFEOUT1: | |
128 | case MAX77843_SAFEOUT2: | |
129 | return max77693->regmap; | |
130 | case MAX77843_CHARGER: | |
131 | return max77693->regmap_chg; | |
132 | default: | |
133 | return max77693->regmap; | |
134 | } | |
135 | } | |
136 | ||
80b022e2 JL |
137 | static const unsigned int max77693_safeout_table[] = { |
138 | 4850000, | |
139 | 4900000, | |
140 | 4950000, | |
141 | 3300000, | |
142 | }; | |
143 | ||
144 | static struct regulator_ops max77693_safeout_ops = { | |
145 | .list_voltage = regulator_list_voltage_table, | |
146 | .is_enabled = regulator_is_enabled_regmap, | |
147 | .enable = regulator_enable_regmap, | |
148 | .disable = regulator_disable_regmap, | |
149 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
150 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
151 | }; | |
152 | ||
153 | static struct regulator_ops max77693_charger_ops = { | |
39d23308 | 154 | .is_enabled = regulator_is_enabled_regmap, |
80b022e2 JL |
155 | .enable = regulator_enable_regmap, |
156 | .disable = regulator_disable_regmap, | |
157 | .get_current_limit = max77693_chg_get_current_limit, | |
158 | .set_current_limit = max77693_chg_set_current_limit, | |
159 | }; | |
160 | ||
9e9a08e8 | 161 | #define max77693_regulator_desc_esafeout(_num) { \ |
80b022e2 JL |
162 | .name = "ESAFEOUT"#_num, \ |
163 | .id = MAX77693_ESAFEOUT##_num, \ | |
222d0f04 KK |
164 | .of_match = of_match_ptr("ESAFEOUT"#_num), \ |
165 | .regulators_node = of_match_ptr("regulators"), \ | |
80b022e2 JL |
166 | .n_voltages = 4, \ |
167 | .ops = &max77693_safeout_ops, \ | |
168 | .type = REGULATOR_VOLTAGE, \ | |
52f48bf3 | 169 | .owner = THIS_MODULE, \ |
80b022e2 JL |
170 | .volt_table = max77693_safeout_table, \ |
171 | .vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ | |
172 | .vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \ | |
173 | .enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \ | |
174 | .enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \ | |
175 | } | |
176 | ||
9e9a08e8 KK |
177 | static const struct regulator_desc max77693_supported_regulators[] = { |
178 | max77693_regulator_desc_esafeout(1), | |
179 | max77693_regulator_desc_esafeout(2), | |
80b022e2 JL |
180 | { |
181 | .name = "CHARGER", | |
182 | .id = MAX77693_CHARGER, | |
222d0f04 KK |
183 | .of_match = of_match_ptr("CHARGER"), |
184 | .regulators_node = of_match_ptr("regulators"), | |
80b022e2 JL |
185 | .ops = &max77693_charger_ops, |
186 | .type = REGULATOR_CURRENT, | |
187 | .owner = THIS_MODULE, | |
188 | .enable_reg = MAX77693_CHG_REG_CHG_CNFG_00, | |
189 | .enable_mask = CHG_CNFG_00_CHG_MASK | | |
190 | CHG_CNFG_00_BUCK_MASK, | |
39d23308 | 191 | .enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK, |
80b022e2 JL |
192 | }, |
193 | }; | |
194 | ||
5b5e771f KK |
195 | static const struct chg_reg_data max77693_chg_reg_data = { |
196 | .linear_reg = MAX77693_CHG_REG_CHG_CNFG_09, | |
197 | .linear_mask = CHG_CNFG_09_CHGIN_ILIM_MASK, | |
198 | .uA_step = 20000, | |
199 | .min_sel = 3, | |
200 | }; | |
201 | ||
9e9a08e8 KK |
202 | #define max77843_regulator_desc_esafeout(num) { \ |
203 | .name = "SAFEOUT" # num, \ | |
204 | .id = MAX77843_SAFEOUT ## num, \ | |
205 | .ops = &max77693_safeout_ops, \ | |
206 | .of_match = of_match_ptr("SAFEOUT" # num), \ | |
207 | .regulators_node = of_match_ptr("regulators"), \ | |
208 | .type = REGULATOR_VOLTAGE, \ | |
209 | .owner = THIS_MODULE, \ | |
210 | .n_voltages = ARRAY_SIZE(max77693_safeout_table), \ | |
211 | .volt_table = max77693_safeout_table, \ | |
212 | .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \ | |
213 | .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num, \ | |
214 | .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \ | |
215 | .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \ | |
216 | } | |
217 | ||
218 | static const struct regulator_desc max77843_supported_regulators[] = { | |
219 | [MAX77843_SAFEOUT1] = max77843_regulator_desc_esafeout(1), | |
220 | [MAX77843_SAFEOUT2] = max77843_regulator_desc_esafeout(2), | |
221 | [MAX77843_CHARGER] = { | |
222 | .name = "CHARGER", | |
223 | .id = MAX77843_CHARGER, | |
224 | .ops = &max77693_charger_ops, | |
225 | .of_match = of_match_ptr("CHARGER"), | |
226 | .regulators_node = of_match_ptr("regulators"), | |
227 | .type = REGULATOR_CURRENT, | |
228 | .owner = THIS_MODULE, | |
229 | .enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, | |
230 | .enable_mask = MAX77843_CHG_MASK, | |
231 | .enable_val = MAX77843_CHG_MASK, | |
232 | }, | |
233 | }; | |
234 | ||
235 | static const struct chg_reg_data max77843_chg_reg_data = { | |
236 | .linear_reg = MAX77843_CHG_REG_CHG_CNFG_02, | |
237 | .linear_mask = MAX77843_CHG_FAST_CHG_CURRENT_MASK, | |
238 | .uA_step = MAX77843_CHG_FAST_CHG_CURRENT_STEP, | |
239 | .min_sel = 2, | |
240 | }; | |
241 | ||
80b022e2 JL |
242 | static int max77693_pmic_probe(struct platform_device *pdev) |
243 | { | |
9e9a08e8 | 244 | enum max77693_types type = platform_get_device_id(pdev)->driver_data; |
80b022e2 | 245 | struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
9e9a08e8 KK |
246 | const struct regulator_desc *regulators; |
247 | unsigned int regulators_size; | |
222d0f04 | 248 | int i; |
ca0c37a0 | 249 | struct regulator_config config = { }; |
80b022e2 | 250 | |
222d0f04 | 251 | config.dev = iodev->dev; |
80b022e2 | 252 | |
9e9a08e8 KK |
253 | switch (type) { |
254 | case TYPE_MAX77693: | |
255 | regulators = max77693_supported_regulators; | |
256 | regulators_size = ARRAY_SIZE(max77693_supported_regulators); | |
257 | config.driver_data = (void *)&max77693_chg_reg_data; | |
258 | break; | |
259 | case TYPE_MAX77843: | |
260 | regulators = max77843_supported_regulators; | |
261 | regulators_size = ARRAY_SIZE(max77843_supported_regulators); | |
262 | config.driver_data = (void *)&max77843_chg_reg_data; | |
263 | break; | |
264 | default: | |
265 | dev_err(&pdev->dev, "Unsupported device type: %u\n", type); | |
266 | return -ENODEV; | |
267 | } | |
268 | ||
269 | for (i = 0; i < regulators_size; i++) { | |
640c24a7 | 270 | struct regulator_dev *rdev; |
80b022e2 | 271 | |
9e9a08e8 KK |
272 | config.regmap = max77693_get_regmap(type, iodev, |
273 | regulators[i].id); | |
274 | ||
640c24a7 | 275 | rdev = devm_regulator_register(&pdev->dev, |
222d0f04 | 276 | ®ulators[i], &config); |
640c24a7 KK |
277 | if (IS_ERR(rdev)) { |
278 | dev_err(&pdev->dev, | |
222d0f04 | 279 | "Failed to initialize regulator-%d\n", i); |
640c24a7 | 280 | return PTR_ERR(rdev); |
80b022e2 JL |
281 | } |
282 | } | |
283 | ||
80b022e2 JL |
284 | return 0; |
285 | } | |
286 | ||
287 | static const struct platform_device_id max77693_pmic_id[] = { | |
5b5e771f | 288 | { "max77693-pmic", TYPE_MAX77693 }, |
9e9a08e8 | 289 | { "max77843-regulator", TYPE_MAX77843 }, |
80b022e2 JL |
290 | {}, |
291 | }; | |
292 | ||
293 | MODULE_DEVICE_TABLE(platform, max77693_pmic_id); | |
294 | ||
295 | static struct platform_driver max77693_pmic_driver = { | |
296 | .driver = { | |
297 | .name = "max77693-pmic", | |
80b022e2 JL |
298 | }, |
299 | .probe = max77693_pmic_probe, | |
80b022e2 JL |
300 | .id_table = max77693_pmic_id, |
301 | }; | |
302 | ||
ee3010d0 MS |
303 | static int __init max77693_pmic_init(void) |
304 | { | |
305 | return platform_driver_register(&max77693_pmic_driver); | |
306 | } | |
307 | subsys_initcall(max77693_pmic_init); | |
308 | ||
309 | static void __exit max77693_pmic_cleanup(void) | |
310 | { | |
311 | platform_driver_unregister(&max77693_pmic_driver); | |
312 | } | |
313 | module_exit(max77693_pmic_cleanup); | |
80b022e2 | 314 | |
9e9a08e8 | 315 | MODULE_DESCRIPTION("MAXIM 77693/77843 regulator driver"); |
80b022e2 | 316 | MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>"); |
9e9a08e8 | 317 | MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski.k@gmail.com>"); |
80b022e2 | 318 | MODULE_LICENSE("GPL"); |