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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 | ||
1922b0f2 | 25 | #include <linux/regulator/of_regulator.h> |
a493077f AC |
26 | #include <linux/regulator/driver.h> |
27 | #include <linux/regulator/machine.h> | |
28 | #include <linux/mfd/tps65217.h> | |
29 | ||
d172f319 | 30 | #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \ |
a493077f AC |
31 | { \ |
32 | .name = _name, \ | |
33 | .id = _id, \ | |
34 | .ops = &_ops, \ | |
35 | .n_voltages = _n, \ | |
36 | .type = REGULATOR_VOLTAGE, \ | |
37 | .owner = THIS_MODULE, \ | |
b4bc9ef6 AL |
38 | .vsel_reg = _vr, \ |
39 | .vsel_mask = _vm, \ | |
40 | .enable_reg = TPS65217_REG_ENABLE, \ | |
41 | .enable_mask = _em, \ | |
d172f319 | 42 | .volt_table = _t, \ |
a493077f AC |
43 | } \ |
44 | ||
d172f319 | 45 | #define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \ |
a493077f AC |
46 | { \ |
47 | .name = _nm, \ | |
48 | .min_uV = _min, \ | |
49 | .max_uV = _max, \ | |
50 | .vsel_to_uv = _f1, \ | |
51 | .uv_to_vsel = _f2, \ | |
a493077f AC |
52 | } |
53 | ||
d172f319 | 54 | static const unsigned int LDO1_VSEL_table[] = { |
a493077f AC |
55 | 1000000, 1100000, 1200000, 1250000, |
56 | 1300000, 1350000, 1400000, 1500000, | |
57 | 1600000, 1800000, 2500000, 2750000, | |
58 | 2800000, 3000000, 3100000, 3300000, | |
59 | }; | |
60 | ||
61 | static int tps65217_vsel_to_uv1(unsigned int vsel) | |
62 | { | |
63 | int uV = 0; | |
64 | ||
65 | if (vsel > 63) | |
66 | return -EINVAL; | |
67 | ||
68 | if (vsel <= 24) | |
69 | uV = vsel * 25000 + 900000; | |
70 | else if (vsel <= 52) | |
71 | uV = (vsel - 24) * 50000 + 1500000; | |
72 | else if (vsel < 56) | |
73 | uV = (vsel - 52) * 100000 + 2900000; | |
74 | else | |
75 | uV = 3300000; | |
76 | ||
77 | return uV; | |
78 | } | |
79 | ||
80 | static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) | |
81 | { | |
1a5d39d0 | 82 | if (uV < 0 || uV > 3300000) |
a493077f AC |
83 | return -EINVAL; |
84 | ||
85 | if (uV <= 1500000) | |
2fe4e025 | 86 | *vsel = DIV_ROUND_UP(uV - 900000, 25000); |
a493077f | 87 | else if (uV <= 2900000) |
2fe4e025 | 88 | *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000); |
a493077f | 89 | else if (uV < 3300000) |
2fe4e025 | 90 | *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000); |
a493077f AC |
91 | else |
92 | *vsel = 56; | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static int tps65217_vsel_to_uv2(unsigned int vsel) | |
98 | { | |
99 | int uV = 0; | |
100 | ||
101 | if (vsel > 31) | |
102 | return -EINVAL; | |
103 | ||
104 | if (vsel <= 8) | |
105 | uV = vsel * 50000 + 1500000; | |
106 | else if (vsel <= 13) | |
107 | uV = (vsel - 8) * 100000 + 1900000; | |
108 | else | |
109 | uV = (vsel - 13) * 50000 + 2400000; | |
110 | ||
111 | return uV; | |
112 | } | |
113 | ||
114 | static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) | |
115 | { | |
1a5d39d0 | 116 | if (uV < 0 || uV > 3300000) |
a493077f AC |
117 | return -EINVAL; |
118 | ||
119 | if (uV <= 1900000) | |
2fe4e025 | 120 | *vsel = DIV_ROUND_UP(uV - 1500000, 50000); |
a493077f | 121 | else if (uV <= 2400000) |
2fe4e025 | 122 | *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000); |
a493077f | 123 | else |
2fe4e025 | 124 | *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000); |
a493077f AC |
125 | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static struct tps_info tps65217_pmic_regs[] = { | |
130 | TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, | |
d172f319 | 131 | tps65217_uv_to_vsel1), |
a493077f | 132 | TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, |
d172f319 | 133 | tps65217_uv_to_vsel1), |
a493077f | 134 | TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, |
d172f319 AL |
135 | tps65217_uv_to_vsel1), |
136 | TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL), | |
a493077f | 137 | TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, |
d172f319 | 138 | tps65217_uv_to_vsel1), |
a493077f | 139 | TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, |
d172f319 | 140 | tps65217_uv_to_vsel2), |
a493077f | 141 | TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, |
d172f319 | 142 | tps65217_uv_to_vsel2), |
a493077f AC |
143 | }; |
144 | ||
fc56911b | 145 | static int tps65217_pmic_enable(struct regulator_dev *dev) |
a493077f | 146 | { |
a493077f | 147 | struct tps65217 *tps = rdev_get_drvdata(dev); |
fc56911b | 148 | unsigned int rid = rdev_get_id(dev); |
a493077f | 149 | |
fc56911b | 150 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
151 | return -EINVAL; |
152 | ||
153 | /* Enable the regulator and password protection is level 1 */ | |
154 | return tps65217_set_bits(tps, TPS65217_REG_ENABLE, | |
b4bc9ef6 AL |
155 | dev->desc->enable_mask, dev->desc->enable_mask, |
156 | TPS65217_PROTECT_L1); | |
a493077f AC |
157 | } |
158 | ||
fc56911b | 159 | static int tps65217_pmic_disable(struct regulator_dev *dev) |
a493077f AC |
160 | { |
161 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 162 | unsigned int rid = rdev_get_id(dev); |
a493077f | 163 | |
fc56911b | 164 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
165 | return -EINVAL; |
166 | ||
167 | /* Disable the regulator and password protection is level 1 */ | |
168 | return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, | |
b4bc9ef6 | 169 | dev->desc->enable_mask, TPS65217_PROTECT_L1); |
a493077f AC |
170 | } |
171 | ||
8b22285f AL |
172 | static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, |
173 | unsigned selector) | |
a493077f | 174 | { |
8b22285f | 175 | int ret; |
a493077f | 176 | struct tps65217 *tps = rdev_get_drvdata(dev); |
8b22285f | 177 | unsigned int rid = rdev_get_id(dev); |
a493077f | 178 | |
8b22285f | 179 | /* Set the voltage based on vsel value and write protect level is 2 */ |
b4bc9ef6 | 180 | ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, |
8b22285f | 181 | selector, TPS65217_PROTECT_L2); |
a493077f | 182 | |
8b22285f AL |
183 | /* Set GO bit for DCDCx to initiate voltage transistion */ |
184 | switch (rid) { | |
185 | case TPS65217_DCDC_1 ... TPS65217_DCDC_3: | |
186 | ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, | |
187 | TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, | |
188 | TPS65217_PROTECT_L2); | |
189 | break; | |
190 | } | |
a493077f | 191 | |
8b22285f | 192 | return ret; |
a493077f AC |
193 | } |
194 | ||
8b22285f AL |
195 | static int tps65217_pmic_map_voltage(struct regulator_dev *dev, |
196 | int min_uV, int max_uV) | |
a493077f | 197 | { |
8b22285f | 198 | |
a493077f | 199 | struct tps65217 *tps = rdev_get_drvdata(dev); |
8b22285f AL |
200 | unsigned int sel, rid = rdev_get_id(dev); |
201 | int ret; | |
a493077f | 202 | |
8b22285f | 203 | /* LDO1 uses regulator_map_voltage_iterate() */ |
fc56911b | 204 | if (rid == TPS65217_LDO_1) |
a493077f AC |
205 | return -EINVAL; |
206 | ||
fc56911b | 207 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
208 | return -EINVAL; |
209 | ||
844e6901 AL |
210 | if (min_uV < tps->info[rid]->min_uV) |
211 | min_uV = tps->info[rid]->min_uV; | |
a493077f | 212 | |
844e6901 | 213 | if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) |
fc56911b AL |
214 | return -EINVAL; |
215 | ||
8b22285f | 216 | ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); |
a493077f AC |
217 | if (ret) |
218 | return ret; | |
219 | ||
8b22285f | 220 | return sel; |
a493077f AC |
221 | } |
222 | ||
fc56911b | 223 | static int tps65217_pmic_list_voltage(struct regulator_dev *dev, |
a493077f AC |
224 | unsigned selector) |
225 | { | |
226 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
fc56911b | 227 | unsigned int rid = rdev_get_id(dev); |
a493077f | 228 | |
fc56911b | 229 | if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) |
a493077f AC |
230 | return -EINVAL; |
231 | ||
d172f319 | 232 | if (selector >= dev->desc->n_voltages) |
a493077f AC |
233 | return -EINVAL; |
234 | ||
fc56911b | 235 | return tps->info[rid]->vsel_to_uv(selector); |
a493077f AC |
236 | } |
237 | ||
fc56911b AL |
238 | /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ |
239 | static struct regulator_ops tps65217_pmic_ops = { | |
b4bc9ef6 | 240 | .is_enabled = regulator_is_enabled_regmap, |
fc56911b AL |
241 | .enable = tps65217_pmic_enable, |
242 | .disable = tps65217_pmic_disable, | |
b4bc9ef6 | 243 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
8b22285f | 244 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, |
fc56911b | 245 | .list_voltage = tps65217_pmic_list_voltage, |
8b22285f | 246 | .map_voltage = tps65217_pmic_map_voltage, |
a493077f AC |
247 | }; |
248 | ||
249 | /* Operations permitted on LDO1 */ | |
250 | static struct regulator_ops tps65217_pmic_ldo1_ops = { | |
b4bc9ef6 | 251 | .is_enabled = regulator_is_enabled_regmap, |
fc56911b AL |
252 | .enable = tps65217_pmic_enable, |
253 | .disable = tps65217_pmic_disable, | |
b4bc9ef6 | 254 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
8b22285f | 255 | .set_voltage_sel = tps65217_pmic_set_voltage_sel, |
d172f319 | 256 | .list_voltage = regulator_list_voltage_table, |
a493077f AC |
257 | }; |
258 | ||
78637a3d | 259 | static const struct regulator_desc regulators[] = { |
b4bc9ef6 AL |
260 | TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, |
261 | TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, | |
d172f319 | 262 | TPS65217_ENABLE_DC1_EN, NULL), |
b4bc9ef6 AL |
263 | TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, |
264 | TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, | |
d172f319 | 265 | TPS65217_ENABLE_DC2_EN, NULL), |
b4bc9ef6 AL |
266 | TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, |
267 | TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, | |
d172f319 | 268 | TPS65217_ENABLE_DC3_EN, NULL), |
b4bc9ef6 AL |
269 | TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, |
270 | TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, | |
d172f319 | 271 | TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table), |
b4bc9ef6 AL |
272 | TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, |
273 | TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, | |
d172f319 | 274 | TPS65217_ENABLE_LDO2_EN, NULL), |
b4bc9ef6 AL |
275 | TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, |
276 | TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, | |
d172f319 AL |
277 | TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, |
278 | NULL), | |
b4bc9ef6 AL |
279 | TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, |
280 | TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, | |
d172f319 AL |
281 | TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, |
282 | NULL), | |
a493077f AC |
283 | }; |
284 | ||
1922b0f2 AC |
285 | #ifdef CONFIG_OF |
286 | static struct of_regulator_match reg_matches[] = { | |
287 | { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 }, | |
288 | { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 }, | |
289 | { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 }, | |
290 | { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 }, | |
291 | { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 }, | |
292 | { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 }, | |
293 | { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 }, | |
294 | }; | |
295 | ||
296 | static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) | |
297 | { | |
298 | struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); | |
299 | struct device_node *node = tps->dev->of_node; | |
300 | struct tps65217_board *pdata; | |
301 | struct device_node *regs; | |
302 | int i, count; | |
303 | ||
304 | regs = of_find_node_by_name(node, "regulators"); | |
305 | if (!regs) | |
306 | return NULL; | |
307 | ||
308 | count = of_regulator_match(pdev->dev.parent, regs, | |
309 | reg_matches, TPS65217_NUM_REGULATOR); | |
310 | of_node_put(regs); | |
311 | if ((count < 0) || (count > TPS65217_NUM_REGULATOR)) | |
312 | return NULL; | |
313 | ||
314 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
315 | if (!pdata) | |
316 | return NULL; | |
317 | ||
318 | for (i = 0; i < count; i++) { | |
319 | if (!reg_matches[i].init_data || !reg_matches[i].of_node) | |
320 | continue; | |
321 | ||
322 | pdata->tps65217_init_data[i] = reg_matches[i].init_data; | |
323 | pdata->of_node[i] = reg_matches[i].of_node; | |
324 | } | |
325 | ||
326 | return pdata; | |
327 | } | |
328 | #else | |
329 | static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) | |
330 | { | |
331 | return NULL; | |
332 | } | |
333 | #endif | |
334 | ||
a493077f AC |
335 | static int __devinit tps65217_regulator_probe(struct platform_device *pdev) |
336 | { | |
1922b0f2 AC |
337 | struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); |
338 | struct tps65217_board *pdata = dev_get_platdata(tps->dev); | |
339 | struct regulator_init_data *reg_data; | |
a493077f | 340 | struct regulator_dev *rdev; |
c172708d | 341 | struct regulator_config config = { }; |
1922b0f2 | 342 | int i, ret; |
a493077f | 343 | |
1922b0f2 AC |
344 | if (tps->dev->of_node) |
345 | pdata = tps65217_parse_dt(pdev); | |
a493077f | 346 | |
1922b0f2 AC |
347 | if (!pdata) { |
348 | dev_err(&pdev->dev, "Platform data not found\n"); | |
349 | return -EINVAL; | |
350 | } | |
c172708d | 351 | |
1922b0f2 AC |
352 | if (tps65217_chip_id(tps) != TPS65217) { |
353 | dev_err(&pdev->dev, "Invalid tps chip version\n"); | |
354 | return -ENODEV; | |
355 | } | |
a493077f | 356 | |
1922b0f2 | 357 | platform_set_drvdata(pdev, tps); |
a493077f | 358 | |
1922b0f2 AC |
359 | for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { |
360 | ||
361 | reg_data = pdata->tps65217_init_data[i]; | |
362 | ||
363 | /* | |
364 | * Regulator API handles empty constraints but not NULL | |
365 | * constraints | |
366 | */ | |
367 | if (!reg_data) | |
368 | continue; | |
369 | ||
370 | /* Register the regulators */ | |
371 | tps->info[i] = &tps65217_pmic_regs[i]; | |
372 | ||
373 | config.dev = tps->dev; | |
374 | config.init_data = reg_data; | |
375 | config.driver_data = tps; | |
376 | config.regmap = tps->regmap; | |
377 | if (tps->dev->of_node) | |
378 | config.of_node = pdata->of_node[i]; | |
379 | ||
380 | rdev = regulator_register(®ulators[i], &config); | |
381 | if (IS_ERR(rdev)) { | |
382 | dev_err(tps->dev, "failed to register %s regulator\n", | |
383 | pdev->name); | |
384 | ret = PTR_ERR(rdev); | |
385 | goto err_unregister_regulator; | |
386 | } | |
387 | ||
388 | /* Save regulator for cleanup */ | |
389 | tps->rdev[i] = rdev; | |
390 | } | |
a493077f | 391 | return 0; |
1922b0f2 AC |
392 | |
393 | err_unregister_regulator: | |
394 | while (--i >= 0) | |
395 | regulator_unregister(tps->rdev[i]); | |
396 | ||
397 | return ret; | |
a493077f AC |
398 | } |
399 | ||
400 | static int __devexit tps65217_regulator_remove(struct platform_device *pdev) | |
401 | { | |
1922b0f2 AC |
402 | struct tps65217 *tps = platform_get_drvdata(pdev); |
403 | unsigned int i; | |
404 | ||
405 | for (i = 0; i < TPS65217_NUM_REGULATOR; i++) | |
406 | regulator_unregister(tps->rdev[i]); | |
a493077f AC |
407 | |
408 | platform_set_drvdata(pdev, NULL); | |
a493077f AC |
409 | |
410 | return 0; | |
411 | } | |
412 | ||
413 | static struct platform_driver tps65217_regulator_driver = { | |
414 | .driver = { | |
415 | .name = "tps65217-pmic", | |
416 | }, | |
417 | .probe = tps65217_regulator_probe, | |
5eb9f2b9 | 418 | .remove = tps65217_regulator_remove, |
a493077f AC |
419 | }; |
420 | ||
421 | static int __init tps65217_regulator_init(void) | |
422 | { | |
423 | return platform_driver_register(&tps65217_regulator_driver); | |
424 | } | |
425 | subsys_initcall(tps65217_regulator_init); | |
426 | ||
427 | static void __exit tps65217_regulator_exit(void) | |
428 | { | |
429 | platform_driver_unregister(&tps65217_regulator_driver); | |
430 | } | |
431 | module_exit(tps65217_regulator_exit); | |
432 | ||
a493077f AC |
433 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); |
434 | MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); | |
435 | MODULE_ALIAS("platform:tps65217-pmic"); | |
436 | MODULE_LICENSE("GPL v2"); |