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1 | /* |
2 | * tps65218-regulator.c | |
3 | * | |
4 | * Regulator driver for TPS65218 PMIC | |
5 | * | |
6 | * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether expressed or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License version 2 for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/of_device.h> | |
25 | #include <linux/regulator/of_regulator.h> | |
26 | #include <linux/regulator/driver.h> | |
27 | #include <linux/regulator/machine.h> | |
28 | #include <linux/mfd/tps65218.h> | |
29 | ||
30 | static unsigned int tps65218_ramp_delay = 4000; | |
31 | ||
32 | enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 }; | |
33 | ||
34 | #define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t, \ | |
35 | _lr, _nlr) \ | |
36 | { \ | |
37 | .name = _name, \ | |
38 | .id = _id, \ | |
39 | .ops = &_ops, \ | |
40 | .n_voltages = _n, \ | |
41 | .type = REGULATOR_VOLTAGE, \ | |
42 | .owner = THIS_MODULE, \ | |
43 | .vsel_reg = _vr, \ | |
44 | .vsel_mask = _vm, \ | |
45 | .enable_reg = _er, \ | |
46 | .enable_mask = _em, \ | |
47 | .volt_table = _t, \ | |
48 | .linear_ranges = _lr, \ | |
49 | .n_linear_ranges = _nlr, \ | |
50 | } \ | |
51 | ||
52 | #define TPS65218_INFO(_id, _nm, _min, _max) \ | |
53 | { \ | |
54 | .id = _id, \ | |
55 | .name = _nm, \ | |
56 | .min_uV = _min, \ | |
57 | .max_uV = _max, \ | |
58 | } | |
59 | ||
60 | static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { | |
61 | REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), | |
62 | REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), | |
63 | }; | |
64 | ||
65 | static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { | |
66 | REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), | |
67 | REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), | |
68 | }; | |
69 | ||
70 | static const struct regulator_linear_range dcdc4_ranges[] = { | |
71 | REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), | |
72 | REGULATOR_LINEAR_RANGE(1550000, 0x10, 0x34, 50000), | |
73 | }; | |
74 | ||
75 | static struct tps_info tps65218_pmic_regs[] = { | |
76 | TPS65218_INFO(0, "DCDC1", 850000, 167500), | |
77 | TPS65218_INFO(1, "DCDC2", 850000, 1675000), | |
78 | TPS65218_INFO(2, "DCDC3", 900000, 3400000), | |
79 | TPS65218_INFO(3, "DCDC4", 1175000, 3400000), | |
80 | TPS65218_INFO(4, "DCDC5", 1000000, 1000000), | |
81 | TPS65218_INFO(5, "DCDC6", 1800000, 1800000), | |
82 | TPS65218_INFO(6, "LDO1", 900000, 3400000), | |
83 | }; | |
84 | ||
85 | #define TPS65218_OF_MATCH(comp, label) \ | |
86 | { \ | |
87 | .compatible = comp, \ | |
88 | .data = &label, \ | |
89 | } | |
90 | ||
91 | static const struct of_device_id tps65218_of_match[] = { | |
92 | TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]), | |
93 | TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]), | |
94 | TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]), | |
95 | TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]), | |
96 | TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]), | |
97 | TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]), | |
98 | TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]), | |
c46b5295 | 99 | { } |
90e7d526 K |
100 | }; |
101 | MODULE_DEVICE_TABLE(of, tps65218_of_match); | |
102 | ||
103 | static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, | |
104 | unsigned selector) | |
105 | { | |
106 | int ret; | |
107 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
108 | unsigned int rid = rdev_get_id(dev); | |
109 | ||
110 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
111 | ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, | |
112 | selector, TPS65218_PROTECT_L1); | |
113 | ||
114 | /* Set GO bit for DCDC1/2 to initiate voltage transistion */ | |
115 | switch (rid) { | |
116 | case TPS65218_DCDC_1: | |
117 | case TPS65218_DCDC_2: | |
118 | ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, | |
119 | TPS65218_SLEW_RATE_GO, | |
120 | TPS65218_SLEW_RATE_GO, | |
121 | TPS65218_PROTECT_L1); | |
122 | break; | |
123 | } | |
124 | ||
125 | return ret; | |
126 | } | |
127 | ||
128 | static int tps65218_pmic_enable(struct regulator_dev *dev) | |
129 | { | |
130 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
131 | unsigned int rid = rdev_get_id(dev); | |
132 | ||
133 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
134 | return -EINVAL; | |
135 | ||
136 | /* Enable the regulator and password protection is level 1 */ | |
137 | return tps65218_set_bits(tps, dev->desc->enable_reg, | |
138 | dev->desc->enable_mask, dev->desc->enable_mask, | |
139 | TPS65218_PROTECT_L1); | |
140 | } | |
141 | ||
142 | static int tps65218_pmic_disable(struct regulator_dev *dev) | |
143 | { | |
144 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
145 | unsigned int rid = rdev_get_id(dev); | |
146 | ||
147 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
148 | return -EINVAL; | |
149 | ||
150 | /* Disable the regulator and password protection is level 1 */ | |
151 | return tps65218_clear_bits(tps, dev->desc->enable_reg, | |
152 | dev->desc->enable_mask, TPS65218_PROTECT_L1); | |
153 | } | |
154 | ||
155 | static int tps65218_set_voltage_time_sel(struct regulator_dev *rdev, | |
156 | unsigned int old_selector, unsigned int new_selector) | |
157 | { | |
158 | int old_uv, new_uv; | |
159 | ||
160 | old_uv = regulator_list_voltage_linear_range(rdev, old_selector); | |
161 | if (old_uv < 0) | |
162 | return old_uv; | |
163 | ||
164 | new_uv = regulator_list_voltage_linear_range(rdev, new_selector); | |
165 | if (new_uv < 0) | |
166 | return new_uv; | |
167 | ||
168 | return DIV_ROUND_UP(abs(old_uv - new_uv), tps65218_ramp_delay); | |
169 | } | |
170 | ||
171 | /* Operations permitted on DCDC1, DCDC2 */ | |
172 | static struct regulator_ops tps65218_dcdc12_ops = { | |
173 | .is_enabled = regulator_is_enabled_regmap, | |
174 | .enable = tps65218_pmic_enable, | |
175 | .disable = tps65218_pmic_disable, | |
176 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
177 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, | |
178 | .list_voltage = regulator_list_voltage_linear_range, | |
179 | .map_voltage = regulator_map_voltage_linear_range, | |
180 | .set_voltage_time_sel = tps65218_set_voltage_time_sel, | |
181 | }; | |
182 | ||
183 | /* Operations permitted on DCDC3, DCDC4 and LDO1 */ | |
184 | static struct regulator_ops tps65218_ldo1_dcdc34_ops = { | |
185 | .is_enabled = regulator_is_enabled_regmap, | |
186 | .enable = tps65218_pmic_enable, | |
187 | .disable = tps65218_pmic_disable, | |
188 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
189 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, | |
190 | .list_voltage = regulator_list_voltage_linear_range, | |
191 | .map_voltage = regulator_map_voltage_linear_range, | |
192 | }; | |
193 | ||
194 | /* Operations permitted on DCDC5, DCDC6 */ | |
195 | static struct regulator_ops tps65218_dcdc56_pmic_ops = { | |
196 | .is_enabled = regulator_is_enabled_regmap, | |
197 | .enable = tps65218_pmic_enable, | |
198 | .disable = tps65218_pmic_disable, | |
199 | }; | |
200 | ||
201 | static const struct regulator_desc regulators[] = { | |
202 | TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64, | |
203 | TPS65218_REG_CONTROL_DCDC1, | |
204 | TPS65218_CONTROL_DCDC1_MASK, | |
205 | TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL, | |
206 | dcdc1_dcdc2_ranges, 2), | |
207 | TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64, | |
208 | TPS65218_REG_CONTROL_DCDC2, | |
209 | TPS65218_CONTROL_DCDC2_MASK, | |
210 | TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL, | |
211 | dcdc1_dcdc2_ranges, 2), | |
212 | TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops, | |
213 | 64, TPS65218_REG_CONTROL_DCDC3, | |
214 | TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, | |
215 | TPS65218_ENABLE1_DC3_EN, NULL, | |
216 | ldo1_dcdc3_ranges, 2), | |
217 | TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops, | |
218 | 53, TPS65218_REG_CONTROL_DCDC4, | |
219 | TPS65218_CONTROL_DCDC4_MASK, | |
220 | TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL, | |
221 | dcdc4_ranges, 2), | |
222 | TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops, | |
223 | 1, -1, -1, TPS65218_REG_ENABLE1, | |
224 | TPS65218_ENABLE1_DC5_EN, NULL, NULL, 0), | |
225 | TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops, | |
226 | 1, -1, -1, TPS65218_REG_ENABLE1, | |
227 | TPS65218_ENABLE1_DC6_EN, NULL, NULL, 0), | |
228 | TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64, | |
229 | TPS65218_REG_CONTROL_DCDC4, | |
230 | TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, | |
231 | TPS65218_ENABLE2_LDO1_EN, NULL, ldo1_dcdc3_ranges, | |
232 | 2), | |
233 | }; | |
234 | ||
235 | static int tps65218_regulator_probe(struct platform_device *pdev) | |
236 | { | |
237 | struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); | |
238 | struct regulator_init_data *init_data; | |
239 | const struct tps_info *template; | |
240 | struct regulator_dev *rdev; | |
241 | const struct of_device_id *match; | |
242 | struct regulator_config config = { }; | |
243 | int id; | |
244 | ||
245 | match = of_match_device(tps65218_of_match, &pdev->dev); | |
948838a1 | 246 | if (!match) |
90e7d526 | 247 | return -ENODEV; |
948838a1 AL |
248 | |
249 | template = match->data; | |
250 | id = template->id; | |
251 | init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node); | |
90e7d526 K |
252 | |
253 | platform_set_drvdata(pdev, tps); | |
254 | ||
255 | tps->info[id] = &tps65218_pmic_regs[id]; | |
256 | config.dev = &pdev->dev; | |
257 | config.init_data = init_data; | |
258 | config.driver_data = tps; | |
259 | config.regmap = tps->regmap; | |
260 | ||
261 | rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); | |
262 | if (IS_ERR(rdev)) { | |
263 | dev_err(tps->dev, "failed to register %s regulator\n", | |
264 | pdev->name); | |
265 | return PTR_ERR(rdev); | |
266 | } | |
267 | ||
90e7d526 K |
268 | return 0; |
269 | } | |
270 | ||
271 | static struct platform_driver tps65218_regulator_driver = { | |
272 | .driver = { | |
273 | .name = "tps65218-pmic", | |
274 | .owner = THIS_MODULE, | |
948838a1 | 275 | .of_match_table = tps65218_of_match, |
90e7d526 K |
276 | }, |
277 | .probe = tps65218_regulator_probe, | |
90e7d526 K |
278 | }; |
279 | ||
280 | module_platform_driver(tps65218_regulator_driver); | |
281 | ||
282 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
283 | MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); | |
284 | MODULE_ALIAS("platform:tps65218-pmic"); | |
285 | MODULE_LICENSE("GPL v2"); |