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1 | /* |
2 | * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ | |
3 | * | |
4 | * Author: Andrew F. Davis <afd@ti.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
11 | * kind, whether expressed or implied; without even the implied warranty | |
12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License version 2 for more details. | |
14 | * | |
15 | * Based on the TPS65912 driver | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/of_device.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regulator/driver.h> | |
22 | #include <linux/regulator/of_regulator.h> | |
23 | ||
24 | #include <linux/mfd/tps65086.h> | |
25 | ||
26 | enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1, | |
27 | LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT }; | |
28 | ||
29 | #define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm) \ | |
30 | [_id] = { \ | |
31 | .desc = { \ | |
32 | .name = _name, \ | |
33 | .of_match = of_match_ptr(_of), \ | |
34 | .of_parse_cb = tps65086_of_parse_cb, \ | |
35 | .id = _id, \ | |
36 | .ops = ®_ops, \ | |
37 | .n_voltages = _nv, \ | |
38 | .type = REGULATOR_VOLTAGE, \ | |
39 | .owner = THIS_MODULE, \ | |
40 | .vsel_reg = _vr, \ | |
41 | .vsel_mask = _vm, \ | |
42 | .enable_reg = _er, \ | |
43 | .enable_mask = _em, \ | |
44 | .volt_table = NULL, \ | |
45 | .linear_ranges = _lr, \ | |
46 | .n_linear_ranges = ARRAY_SIZE(_lr), \ | |
47 | }, \ | |
48 | .decay_reg = _dr, \ | |
49 | .decay_mask = _dm, \ | |
50 | } | |
51 | ||
52 | #define TPS65086_SWITCH(_name, _of, _id, _er, _em) \ | |
53 | [_id] = { \ | |
54 | .desc = { \ | |
55 | .name = _name, \ | |
56 | .of_match = of_match_ptr(_of), \ | |
57 | .of_parse_cb = tps65086_of_parse_cb, \ | |
58 | .id = _id, \ | |
59 | .ops = &switch_ops, \ | |
60 | .type = REGULATOR_VOLTAGE, \ | |
61 | .owner = THIS_MODULE, \ | |
62 | .enable_reg = _er, \ | |
63 | .enable_mask = _em, \ | |
64 | }, \ | |
65 | } | |
66 | ||
67 | struct tps65086_regulator { | |
68 | struct regulator_desc desc; | |
69 | unsigned int decay_reg; | |
70 | unsigned int decay_mask; | |
71 | }; | |
72 | ||
73 | static const struct regulator_linear_range tps65086_buck126_10mv_ranges[] = { | |
74 | REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), | |
75 | REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000), | |
76 | }; | |
77 | ||
78 | static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = { | |
79 | REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), | |
80 | REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0), | |
81 | REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000), | |
82 | }; | |
83 | ||
84 | static const struct regulator_linear_range tps65086_buck345_ranges[] = { | |
85 | REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), | |
86 | REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000), | |
87 | }; | |
88 | ||
89 | static const struct regulator_linear_range tps65086_ldoa1_ranges[] = { | |
90 | REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0), | |
91 | REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000), | |
92 | REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xA, 100000), | |
93 | REGULATOR_LINEAR_RANGE(2700000, 0xB, 0xD, 150000), | |
94 | REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0), | |
95 | }; | |
96 | ||
97 | static const struct regulator_linear_range tps65086_ldoa23_ranges[] = { | |
98 | REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000), | |
99 | REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000), | |
100 | }; | |
101 | ||
102 | /* Operations permitted on regulators */ | |
103 | static struct regulator_ops reg_ops = { | |
104 | .enable = regulator_enable_regmap, | |
105 | .disable = regulator_disable_regmap, | |
106 | .is_enabled = regulator_is_enabled_regmap, | |
107 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
108 | .map_voltage = regulator_map_voltage_linear_range, | |
109 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
110 | .list_voltage = regulator_list_voltage_linear_range, | |
111 | }; | |
112 | ||
113 | /* Operations permitted on load switches */ | |
114 | static struct regulator_ops switch_ops = { | |
115 | .enable = regulator_enable_regmap, | |
116 | .disable = regulator_disable_regmap, | |
117 | .is_enabled = regulator_is_enabled_regmap, | |
118 | }; | |
119 | ||
120 | static int tps65086_of_parse_cb(struct device_node *dev, | |
121 | const struct regulator_desc *desc, | |
122 | struct regulator_config *config); | |
123 | ||
124 | static struct tps65086_regulator regulators[] = { | |
125 | TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL, | |
126 | BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0), | |
127 | tps65086_buck126_10mv_ranges, TPS65086_BUCK1CTRL, | |
128 | BIT(0)), | |
129 | TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL, | |
130 | BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1), | |
131 | tps65086_buck126_10mv_ranges, TPS65086_BUCK2CTRL, | |
132 | BIT(0)), | |
133 | TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID, | |
134 | BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2), | |
135 | tps65086_buck345_ranges, TPS65086_BUCK3DECAY, | |
136 | BIT(0)), | |
137 | TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID, | |
138 | BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0), | |
139 | tps65086_buck345_ranges, TPS65086_BUCK4VID, | |
140 | BIT(0)), | |
141 | TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID, | |
142 | BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0), | |
143 | tps65086_buck345_ranges, TPS65086_BUCK5CTRL, | |
144 | BIT(0)), | |
145 | TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID, | |
146 | BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0), | |
147 | tps65086_buck126_10mv_ranges, TPS65086_BUCK6CTRL, | |
148 | BIT(0)), | |
149 | TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL, | |
150 | VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0), | |
151 | tps65086_ldoa1_ranges, 0, 0), | |
152 | TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID, | |
153 | VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0), | |
154 | tps65086_ldoa23_ranges, 0, 0), | |
155 | TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID, | |
156 | VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0), | |
157 | tps65086_ldoa23_ranges, 0, 0), | |
158 | TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)), | |
159 | TPS65086_SWITCH("SWB1", "swa2", SWB1, TPS65086_SWVTT_EN, BIT(6)), | |
160 | TPS65086_SWITCH("SWB2", "swa3", SWB2, TPS65086_SWVTT_EN, BIT(7)), | |
161 | TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)), | |
162 | }; | |
163 | ||
164 | static inline bool has_25mv_mode(int id) | |
165 | { | |
166 | switch (id) { | |
167 | case BUCK1: | |
168 | case BUCK2: | |
169 | case BUCK6: | |
170 | return true; | |
171 | default: | |
172 | return false; | |
173 | } | |
174 | } | |
175 | ||
176 | static int tps65086_of_parse_cb(struct device_node *dev, | |
177 | const struct regulator_desc *desc, | |
178 | struct regulator_config *config) | |
179 | { | |
180 | int ret; | |
181 | ||
182 | /* Check for 25mV step mode */ | |
183 | if (has_25mv_mode(desc->id) && | |
184 | of_property_read_bool(config->of_node, "ti,regulator-step-size-25mv")) { | |
185 | regulators[desc->id].desc.linear_ranges = | |
186 | tps65086_buck126_25mv_ranges; | |
187 | regulators[desc->id].desc.n_linear_ranges = | |
188 | ARRAY_SIZE(tps65086_buck126_25mv_ranges); | |
189 | } | |
190 | ||
191 | /* Check for decay mode */ | |
192 | if (desc->id <= BUCK6 && of_property_read_bool(config->of_node, "ti,regulator-decay")) { | |
193 | ret = regmap_write_bits(config->regmap, | |
194 | regulators[desc->id].decay_reg, | |
195 | regulators[desc->id].decay_mask, | |
196 | regulators[desc->id].decay_mask); | |
197 | if (ret) { | |
198 | dev_err(config->dev, "Error setting decay\n"); | |
199 | return ret; | |
200 | } | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int tps65086_regulator_probe(struct platform_device *pdev) | |
207 | { | |
208 | struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent); | |
209 | struct regulator_config config = { }; | |
210 | struct regulator_dev *rdev; | |
211 | int i; | |
212 | ||
213 | platform_set_drvdata(pdev, tps); | |
214 | ||
215 | config.dev = &pdev->dev; | |
216 | config.driver_data = tps; | |
217 | config.of_node = pdev->dev.of_node; | |
218 | config.regmap = tps->regmap; | |
219 | ||
220 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { | |
221 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, | |
222 | &config); | |
223 | if (IS_ERR(rdev)) { | |
224 | dev_err(tps->dev, "failed to register %s regulator\n", | |
225 | pdev->name); | |
226 | return PTR_ERR(rdev); | |
227 | } | |
228 | } | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static const struct platform_device_id tps65086_regulator_id_table[] = { | |
234 | { "tps65086-regulator", }, | |
235 | { /* sentinel */ } | |
236 | }; | |
237 | MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table); | |
238 | ||
239 | static struct platform_driver tps65086_regulator_driver = { | |
240 | .driver = { | |
241 | .name = "tps65086-regulator", | |
242 | }, | |
243 | .probe = tps65086_regulator_probe, | |
244 | .id_table = tps65086_regulator_id_table, | |
245 | }; | |
246 | module_platform_driver(tps65086_regulator_driver); | |
247 | ||
248 | MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); | |
249 | MODULE_DESCRIPTION("TPS65086 Regulator driver"); | |
250 | MODULE_LICENSE("GPL v2"); |