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90e7d526 K |
1 | /* |
2 | * tps65218-regulator.c | |
3 | * | |
4 | * Regulator driver for TPS65218 PMIC | |
5 | * | |
6 | * Copyright (C) 2014 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 version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether expressed or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License version 2 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 | #include <linux/of_device.h> | |
0aced355 | 25 | #include <linux/regmap.h> |
90e7d526 K |
26 | #include <linux/regulator/of_regulator.h> |
27 | #include <linux/regulator/driver.h> | |
28 | #include <linux/regulator/machine.h> | |
29 | #include <linux/mfd/tps65218.h> | |
30 | ||
c0ea88b8 NK |
31 | enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, |
32 | DCDC5, DCDC6, LDO1, LS3 }; | |
90e7d526 | 33 | |
2dc49403 K |
34 | #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ |
35 | _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm) \ | |
90e7d526 K |
36 | { \ |
37 | .name = _name, \ | |
2dc49403 | 38 | .of_match = _of, \ |
90e7d526 K |
39 | .id = _id, \ |
40 | .ops = &_ops, \ | |
41 | .n_voltages = _n, \ | |
c0ea88b8 | 42 | .type = _type, \ |
90e7d526 K |
43 | .owner = THIS_MODULE, \ |
44 | .vsel_reg = _vr, \ | |
45 | .vsel_mask = _vm, \ | |
c0ea88b8 NK |
46 | .csel_reg = _cr, \ |
47 | .csel_mask = _cm, \ | |
90e7d526 K |
48 | .enable_reg = _er, \ |
49 | .enable_mask = _em, \ | |
dd648ef2 | 50 | .volt_table = NULL, \ |
90e7d526 K |
51 | .linear_ranges = _lr, \ |
52 | .n_linear_ranges = _nlr, \ | |
5ab9be42 | 53 | .ramp_delay = _delay, \ |
b9a0d359 TK |
54 | .fixed_uV = _fuv, \ |
55 | .bypass_reg = _sr, \ | |
56 | .bypass_mask = _sm, \ | |
90e7d526 K |
57 | } \ |
58 | ||
90e7d526 K |
59 | static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { |
60 | REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), | |
61 | REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), | |
62 | }; | |
63 | ||
64 | static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { | |
65 | REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), | |
66 | REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), | |
67 | }; | |
68 | ||
69 | static const struct regulator_linear_range dcdc4_ranges[] = { | |
70 | REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), | |
42ab0f39 | 71 | REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), |
90e7d526 K |
72 | }; |
73 | ||
90e7d526 K |
74 | static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, |
75 | unsigned selector) | |
76 | { | |
77 | int ret; | |
78 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
79 | unsigned int rid = rdev_get_id(dev); | |
80 | ||
81 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
82 | ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, | |
83 | selector, TPS65218_PROTECT_L1); | |
84 | ||
85 | /* Set GO bit for DCDC1/2 to initiate voltage transistion */ | |
86 | switch (rid) { | |
87 | case TPS65218_DCDC_1: | |
88 | case TPS65218_DCDC_2: | |
89 | ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, | |
90 | TPS65218_SLEW_RATE_GO, | |
91 | TPS65218_SLEW_RATE_GO, | |
92 | TPS65218_PROTECT_L1); | |
93 | break; | |
94 | } | |
95 | ||
96 | return ret; | |
97 | } | |
98 | ||
99 | static int tps65218_pmic_enable(struct regulator_dev *dev) | |
100 | { | |
101 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
5f986f7c | 102 | int rid = rdev_get_id(dev); |
90e7d526 K |
103 | |
104 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
105 | return -EINVAL; | |
106 | ||
107 | /* Enable the regulator and password protection is level 1 */ | |
108 | return tps65218_set_bits(tps, dev->desc->enable_reg, | |
109 | dev->desc->enable_mask, dev->desc->enable_mask, | |
110 | TPS65218_PROTECT_L1); | |
111 | } | |
112 | ||
113 | static int tps65218_pmic_disable(struct regulator_dev *dev) | |
114 | { | |
115 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
5f986f7c | 116 | int rid = rdev_get_id(dev); |
90e7d526 K |
117 | |
118 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
119 | return -EINVAL; | |
120 | ||
121 | /* Disable the regulator and password protection is level 1 */ | |
122 | return tps65218_clear_bits(tps, dev->desc->enable_reg, | |
123 | dev->desc->enable_mask, TPS65218_PROTECT_L1); | |
124 | } | |
125 | ||
b9a0d359 TK |
126 | static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) |
127 | { | |
128 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
129 | unsigned int rid = rdev_get_id(dev); | |
130 | ||
131 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
132 | return -EINVAL; | |
133 | ||
134 | return tps65218_clear_bits(tps, dev->desc->bypass_reg, | |
135 | dev->desc->bypass_mask, | |
136 | TPS65218_PROTECT_L1); | |
137 | } | |
138 | ||
139 | static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) | |
140 | { | |
141 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
142 | unsigned int rid = rdev_get_id(dev); | |
143 | ||
144 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
145 | return -EINVAL; | |
146 | ||
23a34f9d TK |
147 | /* |
148 | * Certain revisions of TPS65218 will need to have DCDC3 regulator | |
149 | * enabled always, otherwise an immediate system reboot will occur | |
150 | * during poweroff. | |
151 | */ | |
152 | if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) | |
153 | return 0; | |
154 | ||
2dc49403 | 155 | if (!tps->strobes[rid]) { |
3fb2ef11 TK |
156 | if (rid == TPS65218_DCDC_3) |
157 | tps->info[rid]->strobe = 3; | |
158 | else | |
159 | return -EINVAL; | |
160 | } | |
b9a0d359 TK |
161 | |
162 | return tps65218_set_bits(tps, dev->desc->bypass_reg, | |
163 | dev->desc->bypass_mask, | |
2dc49403 | 164 | tps->strobes[rid], TPS65218_PROTECT_L1); |
b9a0d359 TK |
165 | } |
166 | ||
90e7d526 K |
167 | /* Operations permitted on DCDC1, DCDC2 */ |
168 | static struct regulator_ops tps65218_dcdc12_ops = { | |
169 | .is_enabled = regulator_is_enabled_regmap, | |
170 | .enable = tps65218_pmic_enable, | |
171 | .disable = tps65218_pmic_disable, | |
172 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
173 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, | |
174 | .list_voltage = regulator_list_voltage_linear_range, | |
175 | .map_voltage = regulator_map_voltage_linear_range, | |
5ab9be42 | 176 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
b9a0d359 TK |
177 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
178 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, | |
90e7d526 K |
179 | }; |
180 | ||
181 | /* Operations permitted on DCDC3, DCDC4 and LDO1 */ | |
182 | static struct regulator_ops tps65218_ldo1_dcdc34_ops = { | |
183 | .is_enabled = regulator_is_enabled_regmap, | |
184 | .enable = tps65218_pmic_enable, | |
185 | .disable = tps65218_pmic_disable, | |
186 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
187 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, | |
188 | .list_voltage = regulator_list_voltage_linear_range, | |
189 | .map_voltage = regulator_map_voltage_linear_range, | |
b9a0d359 TK |
190 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
191 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, | |
90e7d526 K |
192 | }; |
193 | ||
c0ea88b8 NK |
194 | static const int ls3_currents[] = { 100, 200, 500, 1000 }; |
195 | ||
196 | static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, | |
197 | int lim_uA) | |
198 | { | |
199 | unsigned int index = 0; | |
200 | unsigned int num_currents = ARRAY_SIZE(ls3_currents); | |
201 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
202 | ||
203 | while (index < num_currents && ls3_currents[index] != lim_uA) | |
204 | index++; | |
205 | ||
206 | if (index == num_currents) | |
207 | return -EINVAL; | |
208 | ||
209 | return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, | |
210 | index << 2, TPS65218_PROTECT_L1); | |
211 | } | |
212 | ||
213 | static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, | |
214 | int min_uA, int max_uA) | |
215 | { | |
216 | int index = 0; | |
217 | unsigned int num_currents = ARRAY_SIZE(ls3_currents); | |
218 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
219 | ||
220 | while (index < num_currents && ls3_currents[index] < max_uA) | |
221 | index++; | |
222 | ||
223 | index--; | |
224 | ||
225 | if (index < 0 || ls3_currents[index] < min_uA) | |
226 | return -EINVAL; | |
227 | ||
228 | return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, | |
229 | index << 2, TPS65218_PROTECT_L1); | |
230 | } | |
231 | ||
232 | static int tps65218_pmic_get_current_limit(struct regulator_dev *dev) | |
233 | { | |
234 | int retval; | |
235 | unsigned int index; | |
236 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
237 | ||
0aced355 | 238 | retval = regmap_read(tps->regmap, dev->desc->csel_reg, &index); |
c0ea88b8 NK |
239 | if (retval < 0) |
240 | return retval; | |
241 | ||
242 | index = (index & dev->desc->csel_mask) >> 2; | |
243 | ||
244 | return ls3_currents[index]; | |
245 | } | |
246 | ||
247 | static struct regulator_ops tps65218_ls3_ops = { | |
248 | .is_enabled = regulator_is_enabled_regmap, | |
249 | .enable = tps65218_pmic_enable, | |
250 | .disable = tps65218_pmic_disable, | |
251 | .set_input_current_limit = tps65218_pmic_set_input_current_lim, | |
252 | .set_current_limit = tps65218_pmic_set_current_limit, | |
253 | .get_current_limit = tps65218_pmic_get_current_limit, | |
254 | }; | |
255 | ||
90e7d526 K |
256 | /* Operations permitted on DCDC5, DCDC6 */ |
257 | static struct regulator_ops tps65218_dcdc56_pmic_ops = { | |
258 | .is_enabled = regulator_is_enabled_regmap, | |
259 | .enable = tps65218_pmic_enable, | |
260 | .disable = tps65218_pmic_disable, | |
b9a0d359 TK |
261 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
262 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, | |
90e7d526 K |
263 | }; |
264 | ||
265 | static const struct regulator_desc regulators[] = { | |
2dc49403 K |
266 | TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, |
267 | REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, | |
268 | TPS65218_REG_CONTROL_DCDC1, | |
c0ea88b8 NK |
269 | TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, |
270 | TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, | |
b9a0d359 TK |
271 | 2, 4000, 0, TPS65218_REG_SEQ3, |
272 | TPS65218_SEQ3_DC1_SEQ_MASK), | |
2dc49403 K |
273 | TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, |
274 | REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, | |
275 | TPS65218_REG_CONTROL_DCDC2, | |
c0ea88b8 NK |
276 | TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, |
277 | TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, | |
b9a0d359 TK |
278 | 2, 4000, 0, TPS65218_REG_SEQ3, |
279 | TPS65218_SEQ3_DC2_SEQ_MASK), | |
2dc49403 K |
280 | TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, |
281 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, | |
c0ea88b8 | 282 | TPS65218_REG_CONTROL_DCDC3, |
90e7d526 | 283 | TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, |
c0ea88b8 | 284 | TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, |
b9a0d359 | 285 | 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK), |
2dc49403 K |
286 | TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, |
287 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, | |
c0ea88b8 NK |
288 | TPS65218_REG_CONTROL_DCDC4, |
289 | TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, | |
290 | TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, | |
b9a0d359 | 291 | 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK), |
2dc49403 K |
292 | TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, |
293 | REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, | |
294 | -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, | |
295 | 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, | |
b9a0d359 | 296 | TPS65218_SEQ5_DC5_SEQ_MASK), |
2dc49403 K |
297 | TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, |
298 | REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, | |
299 | -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, | |
300 | 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, | |
b9a0d359 | 301 | TPS65218_SEQ5_DC6_SEQ_MASK), |
2dc49403 K |
302 | TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, |
303 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, | |
0eada6a1 | 304 | TPS65218_REG_CONTROL_LDO1, |
90e7d526 | 305 | TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, |
c0ea88b8 | 306 | TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, |
b9a0d359 TK |
307 | 2, 0, 0, TPS65218_REG_SEQ6, |
308 | TPS65218_SEQ6_LDO1_SEQ_MASK), | |
2dc49403 K |
309 | TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, |
310 | REGULATOR_CURRENT, tps65218_ls3_ops, 0, 0, 0, | |
311 | TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, | |
312 | TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, | |
313 | NULL, 0, 0, 0, 0, 0), | |
90e7d526 K |
314 | }; |
315 | ||
316 | static int tps65218_regulator_probe(struct platform_device *pdev) | |
317 | { | |
318 | struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); | |
90e7d526 | 319 | struct regulator_dev *rdev; |
90e7d526 | 320 | struct regulator_config config = { }; |
2dc49403 | 321 | int i, ret; |
b9a0d359 | 322 | unsigned int val; |
90e7d526 | 323 | |
90e7d526 | 324 | config.dev = &pdev->dev; |
2dc49403 | 325 | config.dev->of_node = tps->dev->of_node; |
90e7d526 K |
326 | config.driver_data = tps; |
327 | config.regmap = tps->regmap; | |
328 | ||
2dc49403 K |
329 | /* Allocate memory for strobes */ |
330 | tps->strobes = devm_kzalloc(&pdev->dev, sizeof(u8) * | |
331 | TPS65218_NUM_REGULATOR, GFP_KERNEL); | |
90e7d526 | 332 | |
2dc49403 K |
333 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
334 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i], | |
335 | &config); | |
336 | if (IS_ERR(rdev)) { | |
337 | dev_err(tps->dev, "failed to register %s regulator\n", | |
338 | pdev->name); | |
339 | return PTR_ERR(rdev); | |
340 | } | |
b9a0d359 | 341 | |
2dc49403 K |
342 | ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); |
343 | if (ret) | |
344 | return ret; | |
345 | ||
346 | tps->strobes[i] = val & regulators[i].bypass_mask; | |
347 | } | |
b9a0d359 | 348 | |
90e7d526 K |
349 | return 0; |
350 | } | |
351 | ||
2dc49403 K |
352 | static const struct platform_device_id tps65218_regulator_id_table[] = { |
353 | { "tps65218-regulator", }, | |
354 | { /* sentinel */ } | |
355 | }; | |
356 | MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); | |
357 | ||
90e7d526 K |
358 | static struct platform_driver tps65218_regulator_driver = { |
359 | .driver = { | |
360 | .name = "tps65218-pmic", | |
90e7d526 K |
361 | }, |
362 | .probe = tps65218_regulator_probe, | |
2dc49403 | 363 | .id_table = tps65218_regulator_id_table, |
90e7d526 K |
364 | }; |
365 | ||
366 | module_platform_driver(tps65218_regulator_driver); | |
367 | ||
368 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
369 | MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); | |
370 | MODULE_ALIAS("platform:tps65218-pmic"); | |
371 | MODULE_LICENSE("GPL v2"); |