]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * tps65217-regulator.c | |
3 | * | |
4 | * Regulator driver for TPS65217 PMIC | |
5 | * | |
6 | * Copyright (C) 2011 Texas Instruments Incorporated - https://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 as | |
10 | * published by the Free Software Foundation version 2. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether express or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License 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 | ||
25 | #include <linux/regulator/of_regulator.h> | |
26 | #include <linux/regulator/driver.h> | |
27 | #include <linux/regulator/machine.h> | |
28 | #include <linux/mfd/tps65217.h> | |
29 | ||
30 | #define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \ | |
31 | _t, _lr, _nlr, _sr, _sm) \ | |
32 | { \ | |
33 | .name = _name, \ | |
34 | .id = _id, \ | |
35 | .of_match = of_match_ptr(_of_match), \ | |
36 | .regulators_node= of_match_ptr("regulators"), \ | |
37 | .ops = &_ops, \ | |
38 | .n_voltages = _n, \ | |
39 | .type = REGULATOR_VOLTAGE, \ | |
40 | .owner = THIS_MODULE, \ | |
41 | .vsel_reg = _vr, \ | |
42 | .vsel_mask = _vm, \ | |
43 | .enable_reg = TPS65217_REG_ENABLE, \ | |
44 | .enable_mask = _em, \ | |
45 | .volt_table = _t, \ | |
46 | .linear_ranges = _lr, \ | |
47 | .n_linear_ranges = _nlr, \ | |
48 | .bypass_reg = _sr, \ | |
49 | .bypass_mask = _sm, \ | |
50 | } \ | |
51 | ||
52 | static const unsigned int LDO1_VSEL_table[] = { | |
53 | 1000000, 1100000, 1200000, 1250000, | |
54 | 1300000, 1350000, 1400000, 1500000, | |
55 | 1600000, 1800000, 2500000, 2750000, | |
56 | 2800000, 3000000, 3100000, 3300000, | |
57 | }; | |
58 | ||
59 | static const struct linear_range tps65217_uv1_ranges[] = { | |
60 | REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000), | |
61 | REGULATOR_LINEAR_RANGE(1550000, 25, 52, 50000), | |
62 | REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000), | |
63 | REGULATOR_LINEAR_RANGE(3300000, 56, 63, 0), | |
64 | }; | |
65 | ||
66 | static const struct linear_range tps65217_uv2_ranges[] = { | |
67 | REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000), | |
68 | REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000), | |
69 | REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000), | |
70 | }; | |
71 | ||
72 | static int tps65217_pmic_enable(struct regulator_dev *dev) | |
73 | { | |
74 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
75 | int rid = rdev_get_id(dev); | |
76 | ||
77 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) | |
78 | return -EINVAL; | |
79 | ||
80 | /* Enable the regulator and password protection is level 1 */ | |
81 | return tps65217_set_bits(tps, TPS65217_REG_ENABLE, | |
82 | dev->desc->enable_mask, dev->desc->enable_mask, | |
83 | TPS65217_PROTECT_L1); | |
84 | } | |
85 | ||
86 | static int tps65217_pmic_disable(struct regulator_dev *dev) | |
87 | { | |
88 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
89 | int rid = rdev_get_id(dev); | |
90 | ||
91 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) | |
92 | return -EINVAL; | |
93 | ||
94 | /* Disable the regulator and password protection is level 1 */ | |
95 | return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, | |
96 | dev->desc->enable_mask, TPS65217_PROTECT_L1); | |
97 | } | |
98 | ||
99 | static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, | |
100 | unsigned selector) | |
101 | { | |
102 | int ret; | |
103 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
104 | unsigned int rid = rdev_get_id(dev); | |
105 | ||
106 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
107 | ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, | |
108 | selector, TPS65217_PROTECT_L2); | |
109 | ||
110 | /* Set GO bit for DCDCx to initiate voltage transistion */ | |
111 | switch (rid) { | |
112 | case TPS65217_DCDC_1 ... TPS65217_DCDC_3: | |
113 | ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, | |
114 | TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, | |
115 | TPS65217_PROTECT_L2); | |
116 | break; | |
117 | } | |
118 | ||
119 | return ret; | |
120 | } | |
121 | ||
122 | static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev) | |
123 | { | |
124 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
125 | unsigned int rid = rdev_get_id(dev); | |
126 | ||
127 | if (rid > TPS65217_LDO_4) | |
128 | return -EINVAL; | |
129 | ||
130 | return tps65217_clear_bits(tps, dev->desc->bypass_reg, | |
131 | dev->desc->bypass_mask, | |
132 | TPS65217_PROTECT_L1); | |
133 | } | |
134 | ||
135 | static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev) | |
136 | { | |
137 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
138 | unsigned int rid = rdev_get_id(dev); | |
139 | ||
140 | if (rid > TPS65217_LDO_4) | |
141 | return -EINVAL; | |
142 | ||
143 | if (!tps->strobes[rid]) | |
144 | return -EINVAL; | |
145 | ||
146 | return tps65217_set_bits(tps, dev->desc->bypass_reg, | |
147 | dev->desc->bypass_mask, | |
148 | tps->strobes[rid], TPS65217_PROTECT_L1); | |
149 | } | |
150 | ||
151 | /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ | |
152 | static const struct regulator_ops tps65217_pmic_ops = { | |
153 | .is_enabled = regulator_is_enabled_regmap, | |
154 | .enable = tps65217_pmic_enable, | |
155 | .disable = tps65217_pmic_disable, | |
156 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
157 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, | |
158 | .list_voltage = regulator_list_voltage_linear_range, | |
159 | .map_voltage = regulator_map_voltage_linear_range, | |
160 | .set_suspend_enable = tps65217_pmic_set_suspend_enable, | |
161 | .set_suspend_disable = tps65217_pmic_set_suspend_disable, | |
162 | }; | |
163 | ||
164 | /* Operations permitted on LDO1 */ | |
165 | static const struct regulator_ops tps65217_pmic_ldo1_ops = { | |
166 | .is_enabled = regulator_is_enabled_regmap, | |
167 | .enable = tps65217_pmic_enable, | |
168 | .disable = tps65217_pmic_disable, | |
169 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
170 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, | |
171 | .list_voltage = regulator_list_voltage_table, | |
172 | .map_voltage = regulator_map_voltage_ascend, | |
173 | .set_suspend_enable = tps65217_pmic_set_suspend_enable, | |
174 | .set_suspend_disable = tps65217_pmic_set_suspend_disable, | |
175 | }; | |
176 | ||
177 | static const struct regulator_desc regulators[] = { | |
178 | TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1", | |
179 | tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1, | |
180 | TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN, | |
181 | NULL, tps65217_uv1_ranges, | |
182 | ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, | |
183 | TPS65217_SEQ1_DC1_SEQ_MASK), | |
184 | TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2", | |
185 | tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2, | |
186 | TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN, | |
187 | NULL, tps65217_uv1_ranges, | |
188 | ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, | |
189 | TPS65217_SEQ1_DC2_SEQ_MASK), | |
190 | TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3", | |
191 | tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3, | |
192 | TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN, | |
193 | NULL, tps65217_uv1_ranges, | |
194 | ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2, | |
195 | TPS65217_SEQ2_DC3_SEQ_MASK), | |
196 | TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1", | |
197 | tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1, | |
198 | TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN, | |
199 | LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2, | |
200 | TPS65217_SEQ2_LDO1_SEQ_MASK), | |
201 | TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops, | |
202 | 64, TPS65217_REG_DEFLDO2, | |
203 | TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN, | |
204 | NULL, tps65217_uv1_ranges, | |
205 | ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3, | |
206 | TPS65217_SEQ3_LDO2_SEQ_MASK), | |
207 | TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops, | |
208 | 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, | |
209 | TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, | |
210 | NULL, tps65217_uv2_ranges, | |
211 | ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3, | |
212 | TPS65217_SEQ3_LDO3_SEQ_MASK), | |
213 | TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops, | |
214 | 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, | |
215 | TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, | |
216 | NULL, tps65217_uv2_ranges, | |
217 | ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4, | |
218 | TPS65217_SEQ4_LDO4_SEQ_MASK), | |
219 | }; | |
220 | ||
221 | static int tps65217_regulator_probe(struct platform_device *pdev) | |
222 | { | |
223 | struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); | |
224 | struct tps65217_board *pdata = dev_get_platdata(tps->dev); | |
225 | struct regulator_dev *rdev; | |
226 | struct regulator_config config = { }; | |
227 | int i, ret; | |
228 | unsigned int val; | |
229 | ||
230 | /* Allocate memory for strobes */ | |
231 | tps->strobes = devm_kcalloc(&pdev->dev, | |
232 | TPS65217_NUM_REGULATOR, sizeof(u8), | |
233 | GFP_KERNEL); | |
234 | if (!tps->strobes) | |
235 | return -ENOMEM; | |
236 | ||
237 | platform_set_drvdata(pdev, tps); | |
238 | ||
239 | for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { | |
240 | /* Register the regulators */ | |
241 | config.dev = tps->dev; | |
242 | if (pdata) | |
243 | config.init_data = pdata->tps65217_init_data[i]; | |
244 | config.driver_data = tps; | |
245 | config.regmap = tps->regmap; | |
246 | ||
247 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i], | |
248 | &config); | |
249 | if (IS_ERR(rdev)) { | |
250 | dev_err(tps->dev, "failed to register %s regulator\n", | |
251 | pdev->name); | |
252 | return PTR_ERR(rdev); | |
253 | } | |
254 | ||
255 | /* Store default strobe info */ | |
256 | ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val); | |
257 | if (ret) | |
258 | return ret; | |
259 | ||
260 | tps->strobes[i] = val & regulators[i].bypass_mask; | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static struct platform_driver tps65217_regulator_driver = { | |
267 | .driver = { | |
268 | .name = "tps65217-pmic", | |
269 | }, | |
270 | .probe = tps65217_regulator_probe, | |
271 | }; | |
272 | ||
273 | static int __init tps65217_regulator_init(void) | |
274 | { | |
275 | return platform_driver_register(&tps65217_regulator_driver); | |
276 | } | |
277 | subsys_initcall(tps65217_regulator_init); | |
278 | ||
279 | static void __exit tps65217_regulator_exit(void) | |
280 | { | |
281 | platform_driver_unregister(&tps65217_regulator_driver); | |
282 | } | |
283 | module_exit(tps65217_regulator_exit); | |
284 | ||
285 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); | |
286 | MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); | |
287 | MODULE_ALIAS("platform:tps65217-pmic"); | |
288 | MODULE_LICENSE("GPL v2"); |