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abd46274 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
90e7d526 K |
2 | /* |
3 | * tps65218-regulator.c | |
4 | * | |
5 | * Regulator driver for TPS65218 PMIC | |
6 | * | |
2ca76b3e | 7 | * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/ |
90e7d526 K |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/of_device.h> | |
0aced355 | 17 | #include <linux/regmap.h> |
90e7d526 K |
18 | #include <linux/regulator/of_regulator.h> |
19 | #include <linux/regulator/driver.h> | |
20 | #include <linux/regulator/machine.h> | |
21 | #include <linux/mfd/tps65218.h> | |
22 | ||
2dc49403 | 23 | #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ |
7cfcecfb AL |
24 | _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \ |
25 | _ct, _ncl) \ | |
90e7d526 K |
26 | { \ |
27 | .name = _name, \ | |
2dc49403 | 28 | .of_match = _of, \ |
90e7d526 K |
29 | .id = _id, \ |
30 | .ops = &_ops, \ | |
31 | .n_voltages = _n, \ | |
c0ea88b8 | 32 | .type = _type, \ |
90e7d526 K |
33 | .owner = THIS_MODULE, \ |
34 | .vsel_reg = _vr, \ | |
35 | .vsel_mask = _vm, \ | |
c0ea88b8 NK |
36 | .csel_reg = _cr, \ |
37 | .csel_mask = _cm, \ | |
7cfcecfb AL |
38 | .curr_table = _ct, \ |
39 | .n_current_limits = _ncl, \ | |
90e7d526 K |
40 | .enable_reg = _er, \ |
41 | .enable_mask = _em, \ | |
dd648ef2 | 42 | .volt_table = NULL, \ |
90e7d526 K |
43 | .linear_ranges = _lr, \ |
44 | .n_linear_ranges = _nlr, \ | |
5ab9be42 | 45 | .ramp_delay = _delay, \ |
b9a0d359 TK |
46 | .fixed_uV = _fuv, \ |
47 | .bypass_reg = _sr, \ | |
48 | .bypass_mask = _sm, \ | |
90e7d526 K |
49 | } \ |
50 | ||
60ab7f41 | 51 | static const struct linear_range dcdc1_dcdc2_ranges[] = { |
90e7d526 K |
52 | REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), |
53 | REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), | |
54 | }; | |
55 | ||
60ab7f41 | 56 | static const struct linear_range ldo1_dcdc3_ranges[] = { |
90e7d526 K |
57 | REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), |
58 | REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), | |
59 | }; | |
60 | ||
60ab7f41 | 61 | static const struct linear_range dcdc4_ranges[] = { |
90e7d526 | 62 | REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), |
42ab0f39 | 63 | REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), |
90e7d526 K |
64 | }; |
65 | ||
90e7d526 K |
66 | static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, |
67 | unsigned selector) | |
68 | { | |
69 | int ret; | |
70 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
71 | unsigned int rid = rdev_get_id(dev); | |
72 | ||
73 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
74 | ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, | |
75 | selector, TPS65218_PROTECT_L1); | |
76 | ||
77 | /* Set GO bit for DCDC1/2 to initiate voltage transistion */ | |
78 | switch (rid) { | |
79 | case TPS65218_DCDC_1: | |
80 | case TPS65218_DCDC_2: | |
81 | ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, | |
82 | TPS65218_SLEW_RATE_GO, | |
83 | TPS65218_SLEW_RATE_GO, | |
84 | TPS65218_PROTECT_L1); | |
85 | break; | |
86 | } | |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
91 | static int tps65218_pmic_enable(struct regulator_dev *dev) | |
92 | { | |
93 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
5f986f7c | 94 | int rid = rdev_get_id(dev); |
90e7d526 K |
95 | |
96 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
97 | return -EINVAL; | |
98 | ||
99 | /* Enable the regulator and password protection is level 1 */ | |
100 | return tps65218_set_bits(tps, dev->desc->enable_reg, | |
101 | dev->desc->enable_mask, dev->desc->enable_mask, | |
102 | TPS65218_PROTECT_L1); | |
103 | } | |
104 | ||
105 | static int tps65218_pmic_disable(struct regulator_dev *dev) | |
106 | { | |
107 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
5f986f7c | 108 | int rid = rdev_get_id(dev); |
90e7d526 K |
109 | |
110 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) | |
111 | return -EINVAL; | |
112 | ||
113 | /* Disable the regulator and password protection is level 1 */ | |
114 | return tps65218_clear_bits(tps, dev->desc->enable_reg, | |
115 | dev->desc->enable_mask, TPS65218_PROTECT_L1); | |
116 | } | |
117 | ||
b9a0d359 TK |
118 | static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) |
119 | { | |
120 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
121 | unsigned int rid = rdev_get_id(dev); | |
122 | ||
02d88863 | 123 | if (rid > TPS65218_LDO_1) |
b9a0d359 TK |
124 | return -EINVAL; |
125 | ||
126 | return tps65218_clear_bits(tps, dev->desc->bypass_reg, | |
127 | dev->desc->bypass_mask, | |
128 | TPS65218_PROTECT_L1); | |
129 | } | |
130 | ||
131 | static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) | |
132 | { | |
133 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
134 | unsigned int rid = rdev_get_id(dev); | |
135 | ||
02d88863 | 136 | if (rid > TPS65218_LDO_1) |
b9a0d359 TK |
137 | return -EINVAL; |
138 | ||
23a34f9d TK |
139 | /* |
140 | * Certain revisions of TPS65218 will need to have DCDC3 regulator | |
141 | * enabled always, otherwise an immediate system reboot will occur | |
142 | * during poweroff. | |
143 | */ | |
144 | if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) | |
145 | return 0; | |
146 | ||
2dc49403 | 147 | if (!tps->strobes[rid]) { |
3fb2ef11 | 148 | if (rid == TPS65218_DCDC_3) |
efeb88c6 | 149 | tps->strobes[rid] = 3; |
3fb2ef11 TK |
150 | else |
151 | return -EINVAL; | |
152 | } | |
b9a0d359 TK |
153 | |
154 | return tps65218_set_bits(tps, dev->desc->bypass_reg, | |
155 | dev->desc->bypass_mask, | |
2dc49403 | 156 | tps->strobes[rid], TPS65218_PROTECT_L1); |
b9a0d359 TK |
157 | } |
158 | ||
90e7d526 | 159 | /* Operations permitted on DCDC1, DCDC2 */ |
d1030b43 | 160 | static const struct regulator_ops tps65218_dcdc12_ops = { |
90e7d526 K |
161 | .is_enabled = regulator_is_enabled_regmap, |
162 | .enable = tps65218_pmic_enable, | |
163 | .disable = tps65218_pmic_disable, | |
164 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
165 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, | |
166 | .list_voltage = regulator_list_voltage_linear_range, | |
167 | .map_voltage = regulator_map_voltage_linear_range, | |
5ab9be42 | 168 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
b9a0d359 TK |
169 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
170 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, | |
90e7d526 K |
171 | }; |
172 | ||
173 | /* Operations permitted on DCDC3, DCDC4 and LDO1 */ | |
d1030b43 | 174 | static const struct regulator_ops tps65218_ldo1_dcdc34_ops = { |
90e7d526 K |
175 | .is_enabled = regulator_is_enabled_regmap, |
176 | .enable = tps65218_pmic_enable, | |
177 | .disable = tps65218_pmic_disable, | |
178 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
179 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, | |
180 | .list_voltage = regulator_list_voltage_linear_range, | |
181 | .map_voltage = regulator_map_voltage_linear_range, | |
b9a0d359 TK |
182 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
183 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, | |
90e7d526 K |
184 | }; |
185 | ||
7cfcecfb | 186 | static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 }; |
c0ea88b8 NK |
187 | |
188 | static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, | |
189 | int lim_uA) | |
190 | { | |
191 | unsigned int index = 0; | |
192 | unsigned int num_currents = ARRAY_SIZE(ls3_currents); | |
193 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
194 | ||
195 | while (index < num_currents && ls3_currents[index] != lim_uA) | |
196 | index++; | |
197 | ||
198 | if (index == num_currents) | |
199 | return -EINVAL; | |
200 | ||
201 | return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, | |
e5c8ba06 CH |
202 | index << __builtin_ctz(dev->desc->csel_mask), |
203 | TPS65218_PROTECT_L1); | |
c0ea88b8 NK |
204 | } |
205 | ||
206 | static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, | |
207 | int min_uA, int max_uA) | |
208 | { | |
209 | int index = 0; | |
210 | unsigned int num_currents = ARRAY_SIZE(ls3_currents); | |
211 | struct tps65218 *tps = rdev_get_drvdata(dev); | |
212 | ||
71a64ba2 | 213 | while (index < num_currents && ls3_currents[index] <= max_uA) |
c0ea88b8 NK |
214 | index++; |
215 | ||
216 | index--; | |
217 | ||
218 | if (index < 0 || ls3_currents[index] < min_uA) | |
219 | return -EINVAL; | |
220 | ||
221 | return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, | |
e5c8ba06 CH |
222 | index << __builtin_ctz(dev->desc->csel_mask), |
223 | TPS65218_PROTECT_L1); | |
c0ea88b8 NK |
224 | } |
225 | ||
d1030b43 | 226 | static const struct regulator_ops tps65218_ls23_ops = { |
c0ea88b8 NK |
227 | .is_enabled = regulator_is_enabled_regmap, |
228 | .enable = tps65218_pmic_enable, | |
229 | .disable = tps65218_pmic_disable, | |
230 | .set_input_current_limit = tps65218_pmic_set_input_current_lim, | |
231 | .set_current_limit = tps65218_pmic_set_current_limit, | |
7cfcecfb | 232 | .get_current_limit = regulator_get_current_limit_regmap, |
c0ea88b8 NK |
233 | }; |
234 | ||
90e7d526 | 235 | /* Operations permitted on DCDC5, DCDC6 */ |
d1030b43 | 236 | static const struct regulator_ops tps65218_dcdc56_pmic_ops = { |
90e7d526 K |
237 | .is_enabled = regulator_is_enabled_regmap, |
238 | .enable = tps65218_pmic_enable, | |
239 | .disable = tps65218_pmic_disable, | |
b9a0d359 TK |
240 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
241 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, | |
90e7d526 K |
242 | }; |
243 | ||
244 | static const struct regulator_desc regulators[] = { | |
2dc49403 K |
245 | TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, |
246 | REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, | |
247 | TPS65218_REG_CONTROL_DCDC1, | |
c0ea88b8 NK |
248 | TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, |
249 | TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, | |
b9a0d359 | 250 | 2, 4000, 0, TPS65218_REG_SEQ3, |
7cfcecfb | 251 | TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0), |
2dc49403 K |
252 | TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, |
253 | REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, | |
254 | TPS65218_REG_CONTROL_DCDC2, | |
c0ea88b8 NK |
255 | TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, |
256 | TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, | |
b9a0d359 | 257 | 2, 4000, 0, TPS65218_REG_SEQ3, |
7cfcecfb | 258 | TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0), |
2dc49403 K |
259 | TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, |
260 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, | |
c0ea88b8 | 261 | TPS65218_REG_CONTROL_DCDC3, |
90e7d526 | 262 | TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, |
c0ea88b8 | 263 | TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, |
7cfcecfb AL |
264 | 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK, |
265 | NULL, 0), | |
2dc49403 K |
266 | TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, |
267 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, | |
c0ea88b8 NK |
268 | TPS65218_REG_CONTROL_DCDC4, |
269 | TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, | |
270 | TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, | |
7cfcecfb AL |
271 | 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK, |
272 | NULL, 0), | |
2dc49403 K |
273 | TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, |
274 | REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, | |
275 | -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, | |
276 | 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, | |
7cfcecfb | 277 | TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0), |
2dc49403 K |
278 | TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, |
279 | REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, | |
280 | -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, | |
281 | 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, | |
7cfcecfb | 282 | TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0), |
2dc49403 K |
283 | TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, |
284 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, | |
0eada6a1 | 285 | TPS65218_REG_CONTROL_LDO1, |
90e7d526 | 286 | TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, |
c0ea88b8 | 287 | TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, |
b9a0d359 | 288 | 2, 0, 0, TPS65218_REG_SEQ6, |
7cfcecfb | 289 | TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0), |
e5c8ba06 CH |
290 | TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2, |
291 | REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, | |
292 | TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN, | |
293 | TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK, | |
7cfcecfb AL |
294 | NULL, 0, 0, 0, 0, 0, ls3_currents, |
295 | ARRAY_SIZE(ls3_currents)), | |
2dc49403 | 296 | TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, |
e5c8ba06 | 297 | REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, |
2dc49403 K |
298 | TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, |
299 | TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, | |
7cfcecfb AL |
300 | NULL, 0, 0, 0, 0, 0, ls3_currents, |
301 | ARRAY_SIZE(ls3_currents)), | |
90e7d526 K |
302 | }; |
303 | ||
304 | static int tps65218_regulator_probe(struct platform_device *pdev) | |
305 | { | |
306 | struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); | |
90e7d526 | 307 | struct regulator_dev *rdev; |
90e7d526 | 308 | struct regulator_config config = { }; |
2dc49403 | 309 | int i, ret; |
b9a0d359 | 310 | unsigned int val; |
90e7d526 | 311 | |
90e7d526 | 312 | config.dev = &pdev->dev; |
2dc49403 | 313 | config.dev->of_node = tps->dev->of_node; |
90e7d526 K |
314 | config.driver_data = tps; |
315 | config.regmap = tps->regmap; | |
316 | ||
2dc49403 | 317 | /* Allocate memory for strobes */ |
a86854d0 KC |
318 | tps->strobes = devm_kcalloc(&pdev->dev, |
319 | TPS65218_NUM_REGULATOR, sizeof(u8), | |
320 | GFP_KERNEL); | |
5597bfb4 AL |
321 | if (!tps->strobes) |
322 | return -ENOMEM; | |
90e7d526 | 323 | |
2dc49403 K |
324 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
325 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i], | |
326 | &config); | |
327 | if (IS_ERR(rdev)) { | |
328 | dev_err(tps->dev, "failed to register %s regulator\n", | |
329 | pdev->name); | |
330 | return PTR_ERR(rdev); | |
331 | } | |
b9a0d359 | 332 | |
2dc49403 K |
333 | ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); |
334 | if (ret) | |
335 | return ret; | |
336 | ||
337 | tps->strobes[i] = val & regulators[i].bypass_mask; | |
338 | } | |
b9a0d359 | 339 | |
90e7d526 K |
340 | return 0; |
341 | } | |
342 | ||
2dc49403 K |
343 | static const struct platform_device_id tps65218_regulator_id_table[] = { |
344 | { "tps65218-regulator", }, | |
345 | { /* sentinel */ } | |
346 | }; | |
347 | MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); | |
348 | ||
90e7d526 K |
349 | static struct platform_driver tps65218_regulator_driver = { |
350 | .driver = { | |
351 | .name = "tps65218-pmic", | |
90e7d526 K |
352 | }, |
353 | .probe = tps65218_regulator_probe, | |
2dc49403 | 354 | .id_table = tps65218_regulator_id_table, |
90e7d526 K |
355 | }; |
356 | ||
357 | module_platform_driver(tps65218_regulator_driver); | |
358 | ||
359 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
360 | MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); | |
361 | MODULE_ALIAS("platform:tps65218-pmic"); | |
362 | MODULE_LICENSE("GPL v2"); |