Commit | Line | Data |
---|---|---|
a493077f AC |
1 | /* |
2 | * tps65217-regulator.c | |
3 | * | |
4 | * Regulator driver for TPS65217 PMIC | |
5 | * | |
6 | * Copyright (C) 2011 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 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/driver.h> | |
26 | #include <linux/regulator/machine.h> | |
27 | #include <linux/mfd/tps65217.h> | |
28 | ||
29 | #define TPS65217_REGULATOR(_name, _id, _ops, _n) \ | |
30 | { \ | |
31 | .name = _name, \ | |
32 | .id = _id, \ | |
33 | .ops = &_ops, \ | |
34 | .n_voltages = _n, \ | |
35 | .type = REGULATOR_VOLTAGE, \ | |
36 | .owner = THIS_MODULE, \ | |
37 | } \ | |
38 | ||
39 | #define TPS65217_INFO(_nm, _min, _max, _f1, _f2, _t, _n, _em, _vr, _vm) \ | |
40 | { \ | |
41 | .name = _nm, \ | |
42 | .min_uV = _min, \ | |
43 | .max_uV = _max, \ | |
44 | .vsel_to_uv = _f1, \ | |
45 | .uv_to_vsel = _f2, \ | |
46 | .table = _t, \ | |
47 | .table_len = _n, \ | |
48 | .enable_mask = _em, \ | |
49 | .set_vout_reg = _vr, \ | |
50 | .set_vout_mask = _vm, \ | |
51 | } | |
52 | ||
53 | static const int LDO1_VSEL_table[] = { | |
54 | 1000000, 1100000, 1200000, 1250000, | |
55 | 1300000, 1350000, 1400000, 1500000, | |
56 | 1600000, 1800000, 2500000, 2750000, | |
57 | 2800000, 3000000, 3100000, 3300000, | |
58 | }; | |
59 | ||
60 | static int tps65217_vsel_to_uv1(unsigned int vsel) | |
61 | { | |
62 | int uV = 0; | |
63 | ||
64 | if (vsel > 63) | |
65 | return -EINVAL; | |
66 | ||
67 | if (vsel <= 24) | |
68 | uV = vsel * 25000 + 900000; | |
69 | else if (vsel <= 52) | |
70 | uV = (vsel - 24) * 50000 + 1500000; | |
71 | else if (vsel < 56) | |
72 | uV = (vsel - 52) * 100000 + 2900000; | |
73 | else | |
74 | uV = 3300000; | |
75 | ||
76 | return uV; | |
77 | } | |
78 | ||
79 | static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) | |
80 | { | |
81 | if ((uV < 0) && (uV > 3300000)) | |
82 | return -EINVAL; | |
83 | ||
84 | if (uV <= 1500000) | |
2fe4e025 | 85 | *vsel = DIV_ROUND_UP(uV - 900000, 25000); |
a493077f | 86 | else if (uV <= 2900000) |
2fe4e025 | 87 | *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000); |
a493077f | 88 | else if (uV < 3300000) |
2fe4e025 | 89 | *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000); |
a493077f AC |
90 | else |
91 | *vsel = 56; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int tps65217_vsel_to_uv2(unsigned int vsel) | |
97 | { | |
98 | int uV = 0; | |
99 | ||
100 | if (vsel > 31) | |
101 | return -EINVAL; | |
102 | ||
103 | if (vsel <= 8) | |
104 | uV = vsel * 50000 + 1500000; | |
105 | else if (vsel <= 13) | |
106 | uV = (vsel - 8) * 100000 + 1900000; | |
107 | else | |
108 | uV = (vsel - 13) * 50000 + 2400000; | |
109 | ||
110 | return uV; | |
111 | } | |
112 | ||
113 | static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) | |
114 | { | |
115 | if ((uV < 0) && (uV > 3300000)) | |
116 | return -EINVAL; | |
117 | ||
118 | if (uV <= 1900000) | |
2fe4e025 | 119 | *vsel = DIV_ROUND_UP(uV - 1500000, 50000); |
a493077f | 120 | else if (uV <= 2400000) |
2fe4e025 | 121 | *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000); |
a493077f | 122 | else |
2fe4e025 | 123 | *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000); |
a493077f AC |
124 | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static struct tps_info tps65217_pmic_regs[] = { | |
129 | TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, | |
130 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC1_EN, | |
131 | TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK), | |
132 | TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, | |
133 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC2_EN, | |
134 | TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK), | |
135 | TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, | |
136 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC3_EN, | |
137 | TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK), | |
138 | TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL, LDO1_VSEL_table, | |
139 | 16, TPS65217_ENABLE_LDO1_EN, TPS65217_REG_DEFLDO1, | |
140 | TPS65217_DEFLDO1_LDO1_MASK), | |
141 | TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, | |
142 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_LDO2_EN, | |
143 | TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK), | |
144 | TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, | |
145 | tps65217_uv_to_vsel2, NULL, 32, | |
146 | TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, | |
147 | TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK), | |
148 | TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, | |
149 | tps65217_uv_to_vsel2, NULL, 32, | |
150 | TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, | |
151 | TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK), | |
152 | }; | |
153 | ||
fc56911b | 154 | static int tps65217_pmic_is_enabled(struct regulator_dev *dev) |
a493077f AC |
155 | { |
156 | int ret; | |
157 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 158 | unsigned int data, rid = rdev_get_id(dev); |
a493077f | 159 | |
fc56911b | 160 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
161 | return -EINVAL; |
162 | ||
163 | ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data); | |
164 | if (ret) | |
165 | return ret; | |
166 | ||
fc56911b | 167 | return (data & tps->info[rid]->enable_mask) ? 1 : 0; |
a493077f AC |
168 | } |
169 | ||
fc56911b | 170 | static int tps65217_pmic_enable(struct regulator_dev *dev) |
a493077f | 171 | { |
a493077f | 172 | struct tps65217 *tps = rdev_get_drvdata(dev); |
fc56911b | 173 | unsigned int rid = rdev_get_id(dev); |
a493077f | 174 | |
fc56911b | 175 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
176 | return -EINVAL; |
177 | ||
178 | /* Enable the regulator and password protection is level 1 */ | |
179 | return tps65217_set_bits(tps, TPS65217_REG_ENABLE, | |
fc56911b AL |
180 | tps->info[rid]->enable_mask, |
181 | tps->info[rid]->enable_mask, | |
a493077f AC |
182 | TPS65217_PROTECT_L1); |
183 | } | |
184 | ||
fc56911b | 185 | static int tps65217_pmic_disable(struct regulator_dev *dev) |
a493077f AC |
186 | { |
187 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 188 | unsigned int rid = rdev_get_id(dev); |
a493077f | 189 | |
fc56911b | 190 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
191 | return -EINVAL; |
192 | ||
193 | /* Disable the regulator and password protection is level 1 */ | |
194 | return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, | |
fc56911b | 195 | tps->info[rid]->enable_mask, TPS65217_PROTECT_L1); |
a493077f AC |
196 | } |
197 | ||
fc56911b | 198 | static int tps65217_pmic_get_voltage_sel(struct regulator_dev *dev) |
a493077f AC |
199 | { |
200 | int ret; | |
201 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 202 | unsigned int selector, rid = rdev_get_id(dev); |
a493077f | 203 | |
fc56911b | 204 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
205 | return -EINVAL; |
206 | ||
fc56911b | 207 | ret = tps65217_reg_read(tps, tps->info[rid]->set_vout_reg, &selector); |
a493077f AC |
208 | if (ret) |
209 | return ret; | |
210 | ||
fc56911b | 211 | selector &= tps->info[rid]->set_vout_mask; |
a493077f AC |
212 | |
213 | return selector; | |
214 | } | |
215 | ||
8b22285f AL |
216 | static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, |
217 | unsigned selector) | |
a493077f | 218 | { |
8b22285f | 219 | int ret; |
a493077f | 220 | struct tps65217 *tps = rdev_get_drvdata(dev); |
8b22285f | 221 | unsigned int rid = rdev_get_id(dev); |
a493077f | 222 | |
8b22285f AL |
223 | /* Set the voltage based on vsel value and write protect level is 2 */ |
224 | ret = tps65217_set_bits(tps, tps->info[rid]->set_vout_reg, | |
225 | tps->info[rid]->set_vout_mask, | |
226 | selector, TPS65217_PROTECT_L2); | |
a493077f | 227 | |
8b22285f AL |
228 | /* Set GO bit for DCDCx to initiate voltage transistion */ |
229 | switch (rid) { | |
230 | case TPS65217_DCDC_1 ... TPS65217_DCDC_3: | |
231 | ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, | |
232 | TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, | |
233 | TPS65217_PROTECT_L2); | |
234 | break; | |
235 | } | |
a493077f | 236 | |
8b22285f | 237 | return ret; |
a493077f AC |
238 | } |
239 | ||
8b22285f AL |
240 | static int tps65217_pmic_map_voltage(struct regulator_dev *dev, |
241 | int min_uV, int max_uV) | |
a493077f | 242 | { |
8b22285f | 243 | |
a493077f | 244 | struct tps65217 *tps = rdev_get_drvdata(dev); |
8b22285f AL |
245 | unsigned int sel, rid = rdev_get_id(dev); |
246 | int ret; | |
a493077f | 247 | |
8b22285f | 248 | /* LDO1 uses regulator_map_voltage_iterate() */ |
fc56911b | 249 | if (rid == TPS65217_LDO_1) |
a493077f AC |
250 | return -EINVAL; |
251 | ||
fc56911b | 252 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
253 | return -EINVAL; |
254 | ||
8b22285f | 255 | if (min_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) |
a493077f AC |
256 | return -EINVAL; |
257 | ||
8b22285f | 258 | if (max_uV < tps->info[rid]->min_uV || max_uV > tps->info[rid]->max_uV) |
fc56911b AL |
259 | return -EINVAL; |
260 | ||
8b22285f | 261 | ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); |
a493077f AC |
262 | if (ret) |
263 | return ret; | |
264 | ||
8b22285f | 265 | return sel; |
a493077f AC |
266 | } |
267 | ||
fc56911b | 268 | static int tps65217_pmic_list_voltage(struct regulator_dev *dev, |
a493077f AC |
269 | unsigned selector) |
270 | { | |
271 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 272 | unsigned int rid = rdev_get_id(dev); |
a493077f | 273 | |
fc56911b | 274 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
275 | return -EINVAL; |
276 | ||
fc56911b | 277 | if (selector >= tps->info[rid]->table_len) |
a493077f AC |
278 | return -EINVAL; |
279 | ||
fc56911b AL |
280 | if (tps->info[rid]->table) |
281 | return tps->info[rid]->table[selector]; | |
a493077f | 282 | |
fc56911b | 283 | return tps->info[rid]->vsel_to_uv(selector); |
a493077f AC |
284 | } |
285 | ||
fc56911b AL |
286 | /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ |
287 | static struct regulator_ops tps65217_pmic_ops = { | |
288 | .is_enabled = tps65217_pmic_is_enabled, | |
289 | .enable = tps65217_pmic_enable, | |
290 | .disable = tps65217_pmic_disable, | |
291 | .get_voltage_sel = tps65217_pmic_get_voltage_sel, | |
8b22285f | 292 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, |
fc56911b | 293 | .list_voltage = tps65217_pmic_list_voltage, |
8b22285f | 294 | .map_voltage = tps65217_pmic_map_voltage, |
a493077f AC |
295 | }; |
296 | ||
297 | /* Operations permitted on LDO1 */ | |
298 | static struct regulator_ops tps65217_pmic_ldo1_ops = { | |
fc56911b AL |
299 | .is_enabled = tps65217_pmic_is_enabled, |
300 | .enable = tps65217_pmic_enable, | |
301 | .disable = tps65217_pmic_disable, | |
302 | .get_voltage_sel = tps65217_pmic_get_voltage_sel, | |
8b22285f | 303 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, |
fc56911b | 304 | .list_voltage = tps65217_pmic_list_voltage, |
a493077f AC |
305 | }; |
306 | ||
78637a3d | 307 | static const struct regulator_desc regulators[] = { |
fc56911b AL |
308 | TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64), |
309 | TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64), | |
310 | TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64), | |
311 | TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16), | |
312 | TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64), | |
313 | TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32), | |
314 | TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32), | |
a493077f AC |
315 | }; |
316 | ||
317 | static int __devinit tps65217_regulator_probe(struct platform_device *pdev) | |
318 | { | |
319 | struct regulator_dev *rdev; | |
320 | struct tps65217 *tps; | |
321 | struct tps_info *info = &tps65217_pmic_regs[pdev->id]; | |
c172708d | 322 | struct regulator_config config = { }; |
a493077f AC |
323 | |
324 | /* Already set by core driver */ | |
325 | tps = dev_to_tps65217(pdev->dev.parent); | |
326 | tps->info[pdev->id] = info; | |
327 | ||
c172708d MB |
328 | config.dev = &pdev->dev; |
329 | config.init_data = pdev->dev.platform_data; | |
330 | config.driver_data = tps; | |
331 | ||
332 | rdev = regulator_register(®ulators[pdev->id], &config); | |
a493077f AC |
333 | if (IS_ERR(rdev)) |
334 | return PTR_ERR(rdev); | |
335 | ||
336 | platform_set_drvdata(pdev, rdev); | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
341 | static int __devexit tps65217_regulator_remove(struct platform_device *pdev) | |
342 | { | |
343 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
344 | ||
345 | platform_set_drvdata(pdev, NULL); | |
346 | regulator_unregister(rdev); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static struct platform_driver tps65217_regulator_driver = { | |
352 | .driver = { | |
353 | .name = "tps65217-pmic", | |
354 | }, | |
355 | .probe = tps65217_regulator_probe, | |
356 | .remove = __devexit_p(tps65217_regulator_remove), | |
357 | }; | |
358 | ||
359 | static int __init tps65217_regulator_init(void) | |
360 | { | |
361 | return platform_driver_register(&tps65217_regulator_driver); | |
362 | } | |
363 | subsys_initcall(tps65217_regulator_init); | |
364 | ||
365 | static void __exit tps65217_regulator_exit(void) | |
366 | { | |
367 | platform_driver_unregister(&tps65217_regulator_driver); | |
368 | } | |
369 | module_exit(tps65217_regulator_exit); | |
370 | ||
a493077f AC |
371 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); |
372 | MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); | |
373 | MODULE_ALIAS("platform:tps65217-pmic"); | |
374 | MODULE_LICENSE("GPL v2"); |