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
tps65217_vsel_to_uv1(unsigned int vsel)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
tps65217_uv_to_vsel1(int uV,unsigned int * vsel)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)
85 *vsel = DIV_ROUND_UP(uV - 900000, 25000);
86 else if (uV <= 2900000)
87 *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000);
88 else if (uV < 3300000)
89 *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000);
90 else
91 *vsel = 56;
92
93 return 0;
94 }
95
tps65217_vsel_to_uv2(unsigned int vsel)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
tps65217_uv_to_vsel2(int uV,unsigned int * vsel)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)
119 *vsel = DIV_ROUND_UP(uV - 1500000, 50000);
120 else if (uV <= 2400000)
121 *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000);
122 else
123 *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000);
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
tps65217_pmic_is_enabled(struct regulator_dev * dev)154 static int tps65217_pmic_is_enabled(struct regulator_dev *dev)
155 {
156 int ret;
157 struct tps65217 *tps = rdev_get_drvdata(dev);
158 unsigned int data, rid = rdev_get_id(dev);
159
160 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
161 return -EINVAL;
162
163 ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data);
164 if (ret)
165 return ret;
166
167 return (data & tps->info[rid]->enable_mask) ? 1 : 0;
168 }
169
tps65217_pmic_enable(struct regulator_dev * dev)170 static int tps65217_pmic_enable(struct regulator_dev *dev)
171 {
172 struct tps65217 *tps = rdev_get_drvdata(dev);
173 unsigned int rid = rdev_get_id(dev);
174
175 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
176 return -EINVAL;
177
178 /* Enable the regulator and password protection is level 1 */
179 return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
180 tps->info[rid]->enable_mask,
181 tps->info[rid]->enable_mask,
182 TPS65217_PROTECT_L1);
183 }
184
tps65217_pmic_disable(struct regulator_dev * dev)185 static int tps65217_pmic_disable(struct regulator_dev *dev)
186 {
187 struct tps65217 *tps = rdev_get_drvdata(dev);
188 unsigned int rid = rdev_get_id(dev);
189
190 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
191 return -EINVAL;
192
193 /* Disable the regulator and password protection is level 1 */
194 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
195 tps->info[rid]->enable_mask, TPS65217_PROTECT_L1);
196 }
197
tps65217_pmic_get_voltage_sel(struct regulator_dev * dev)198 static int tps65217_pmic_get_voltage_sel(struct regulator_dev *dev)
199 {
200 int ret;
201 struct tps65217 *tps = rdev_get_drvdata(dev);
202 unsigned int selector, rid = rdev_get_id(dev);
203
204 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
205 return -EINVAL;
206
207 ret = tps65217_reg_read(tps, tps->info[rid]->set_vout_reg, &selector);
208 if (ret)
209 return ret;
210
211 selector &= tps->info[rid]->set_vout_mask;
212
213 return selector;
214 }
215
tps65217_pmic_ldo1_set_voltage_sel(struct regulator_dev * dev,unsigned selector)216 static int tps65217_pmic_ldo1_set_voltage_sel(struct regulator_dev *dev,
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
tps65217_pmic_set_voltage(struct regulator_dev * dev,int min_uV,int max_uV,unsigned * selector)234 static int tps65217_pmic_set_voltage(struct regulator_dev *dev,
235 int min_uV, int max_uV, unsigned *selector)
236 {
237 int ret;
238 struct tps65217 *tps = rdev_get_drvdata(dev);
239 unsigned int rid = rdev_get_id(dev);
240
241 /* LDO1 implements set_voltage_sel callback */
242 if (rid == TPS65217_LDO_1)
243 return -EINVAL;
244
245 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
246 return -EINVAL;
247
248 if (min_uV < tps->info[rid]->min_uV
249 || min_uV > tps->info[rid]->max_uV)
250 return -EINVAL;
251
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);
257 if (ret)
258 return ret;
259
260 /* Set the voltage based on vsel value and write protect level is 2 */
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 }
273
274 return ret;
275 }
276
tps65217_pmic_list_voltage(struct regulator_dev * dev,unsigned selector)277 static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
278 unsigned selector)
279 {
280 struct tps65217 *tps = rdev_get_drvdata(dev);
281 unsigned int rid = rdev_get_id(dev);
282
283 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
284 return -EINVAL;
285
286 if (selector >= tps->info[rid]->table_len)
287 return -EINVAL;
288
289 if (tps->info[rid]->table)
290 return tps->info[rid]->table[selector];
291
292 return tps->info[rid]->vsel_to_uv(selector);
293 }
294
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,
303 };
304
305 /* Operations permitted on LDO1 */
306 static struct regulator_ops tps65217_pmic_ldo1_ops = {
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,
313 };
314
315 static struct regulator_desc regulators[] = {
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),
323 };
324
tps65217_regulator_probe(struct platform_device * pdev)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,
336 pdev->dev.platform_data, tps, NULL);
337 if (IS_ERR(rdev))
338 return PTR_ERR(rdev);
339
340 platform_set_drvdata(pdev, rdev);
341
342 return 0;
343 }
344
tps65217_regulator_remove(struct platform_device * pdev)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
tps65217_regulator_init(void)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
tps65217_regulator_exit(void)369 static void __exit tps65217_regulator_exit(void)
370 {
371 platform_driver_unregister(&tps65217_regulator_driver);
372 }
373 module_exit(tps65217_regulator_exit);
374
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");
379