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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 | ||
fc56911b | 216 | static int tps65217_pmic_ldo1_set_voltage_sel(struct regulator_dev *dev, |
a493077f AC |
217 | unsigned selector) |
218 | { | |
219 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
220 | int ldo = rdev_get_id(dev); | |
221 | ||
222 | if (ldo != TPS65217_LDO_1) | |
223 | return -EINVAL; | |
224 | ||
225 | if (selector >= tps->info[ldo]->table_len) | |
226 | return -EINVAL; | |
227 | ||
228 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
229 | return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg, | |
230 | tps->info[ldo]->set_vout_mask, | |
231 | selector, TPS65217_PROTECT_L2); | |
232 | } | |
233 | ||
fc56911b | 234 | static int tps65217_pmic_set_voltage(struct regulator_dev *dev, |
a493077f AC |
235 | int min_uV, int max_uV, unsigned *selector) |
236 | { | |
237 | int ret; | |
238 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 239 | unsigned int rid = rdev_get_id(dev); |
a493077f | 240 | |
fc56911b AL |
241 | /* LDO1 implements set_voltage_sel callback */ |
242 | if (rid == TPS65217_LDO_1) | |
a493077f AC |
243 | return -EINVAL; |
244 | ||
fc56911b | 245 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
246 | return -EINVAL; |
247 | ||
fc56911b AL |
248 | if (min_uV < tps->info[rid]->min_uV |
249 | || min_uV > tps->info[rid]->max_uV) | |
a493077f AC |
250 | return -EINVAL; |
251 | ||
fc56911b AL |
252 | if (max_uV < tps->info[rid]->min_uV |
253 | || max_uV > tps->info[rid]->max_uV) | |
254 | return -EINVAL; | |
255 | ||
256 | ret = tps->info[rid]->uv_to_vsel(min_uV, selector); | |
a493077f AC |
257 | if (ret) |
258 | return ret; | |
259 | ||
260 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
fc56911b AL |
261 | ret = tps65217_set_bits(tps, tps->info[rid]->set_vout_reg, |
262 | tps->info[rid]->set_vout_mask, | |
263 | *selector, TPS65217_PROTECT_L2); | |
264 | ||
265 | /* Set GO bit for DCDCx to initiate voltage transistion */ | |
266 | switch (rid) { | |
267 | case TPS65217_DCDC_1 ... TPS65217_DCDC_3: | |
268 | ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, | |
269 | TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, | |
270 | TPS65217_PROTECT_L2); | |
271 | break; | |
272 | } | |
a493077f | 273 | |
fc56911b | 274 | return ret; |
a493077f AC |
275 | } |
276 | ||
fc56911b | 277 | static int tps65217_pmic_list_voltage(struct regulator_dev *dev, |
a493077f AC |
278 | unsigned selector) |
279 | { | |
280 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 281 | unsigned int rid = rdev_get_id(dev); |
a493077f | 282 | |
fc56911b | 283 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
284 | return -EINVAL; |
285 | ||
fc56911b | 286 | if (selector >= tps->info[rid]->table_len) |
a493077f AC |
287 | return -EINVAL; |
288 | ||
fc56911b AL |
289 | if (tps->info[rid]->table) |
290 | return tps->info[rid]->table[selector]; | |
a493077f | 291 | |
fc56911b | 292 | return tps->info[rid]->vsel_to_uv(selector); |
a493077f AC |
293 | } |
294 | ||
fc56911b AL |
295 | /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ |
296 | static struct regulator_ops tps65217_pmic_ops = { | |
297 | .is_enabled = tps65217_pmic_is_enabled, | |
298 | .enable = tps65217_pmic_enable, | |
299 | .disable = tps65217_pmic_disable, | |
300 | .get_voltage_sel = tps65217_pmic_get_voltage_sel, | |
301 | .set_voltage = tps65217_pmic_set_voltage, | |
302 | .list_voltage = tps65217_pmic_list_voltage, | |
a493077f AC |
303 | }; |
304 | ||
305 | /* Operations permitted on LDO1 */ | |
306 | static struct regulator_ops tps65217_pmic_ldo1_ops = { | |
fc56911b AL |
307 | .is_enabled = tps65217_pmic_is_enabled, |
308 | .enable = tps65217_pmic_enable, | |
309 | .disable = tps65217_pmic_disable, | |
310 | .get_voltage_sel = tps65217_pmic_get_voltage_sel, | |
311 | .set_voltage_sel = tps65217_pmic_ldo1_set_voltage_sel, | |
312 | .list_voltage = tps65217_pmic_list_voltage, | |
a493077f AC |
313 | }; |
314 | ||
315 | static struct regulator_desc regulators[] = { | |
fc56911b AL |
316 | TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64), |
317 | TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64), | |
318 | TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64), | |
319 | TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16), | |
320 | TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64), | |
321 | TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32), | |
322 | TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32), | |
a493077f AC |
323 | }; |
324 | ||
325 | static int __devinit tps65217_regulator_probe(struct platform_device *pdev) | |
326 | { | |
327 | struct regulator_dev *rdev; | |
328 | struct tps65217 *tps; | |
329 | struct tps_info *info = &tps65217_pmic_regs[pdev->id]; | |
330 | ||
331 | /* Already set by core driver */ | |
332 | tps = dev_to_tps65217(pdev->dev.parent); | |
333 | tps->info[pdev->id] = info; | |
334 | ||
335 | rdev = regulator_register(®ulators[pdev->id], &pdev->dev, | |
b683d980 | 336 | pdev->dev.platform_data, tps, NULL); |
a493077f AC |
337 | if (IS_ERR(rdev)) |
338 | return PTR_ERR(rdev); | |
339 | ||
340 | platform_set_drvdata(pdev, rdev); | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | static int __devexit tps65217_regulator_remove(struct platform_device *pdev) | |
346 | { | |
347 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
348 | ||
349 | platform_set_drvdata(pdev, NULL); | |
350 | regulator_unregister(rdev); | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | static struct platform_driver tps65217_regulator_driver = { | |
356 | .driver = { | |
357 | .name = "tps65217-pmic", | |
358 | }, | |
359 | .probe = tps65217_regulator_probe, | |
360 | .remove = __devexit_p(tps65217_regulator_remove), | |
361 | }; | |
362 | ||
363 | static int __init tps65217_regulator_init(void) | |
364 | { | |
365 | return platform_driver_register(&tps65217_regulator_driver); | |
366 | } | |
367 | subsys_initcall(tps65217_regulator_init); | |
368 | ||
369 | static void __exit tps65217_regulator_exit(void) | |
370 | { | |
371 | platform_driver_unregister(&tps65217_regulator_driver); | |
372 | } | |
373 | module_exit(tps65217_regulator_exit); | |
374 | ||
a493077f AC |
375 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); |
376 | MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); | |
377 | MODULE_ALIAS("platform:tps65217-pmic"); | |
378 | MODULE_LICENSE("GPL v2"); |