1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * tps65218-regulator.c
4 *
5 * Regulator driver for TPS65218 PMIC
6 *
7 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/
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/regmap.h>
17 #include <linux/regulator/of_regulator.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/mfd/tps65218.h>
21
22 #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
23 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \
24 _ct, _ncl) \
25 { \
26 .name = _name, \
27 .of_match = _of, \
28 .id = _id, \
29 .ops = &_ops, \
30 .n_voltages = _n, \
31 .type = _type, \
32 .owner = THIS_MODULE, \
33 .vsel_reg = _vr, \
34 .vsel_mask = _vm, \
35 .csel_reg = _cr, \
36 .csel_mask = _cm, \
37 .curr_table = _ct, \
38 .n_current_limits = _ncl, \
39 .enable_reg = _er, \
40 .enable_mask = _em, \
41 .volt_table = NULL, \
42 .linear_ranges = _lr, \
43 .n_linear_ranges = _nlr, \
44 .ramp_delay = _delay, \
45 .fixed_uV = _fuv, \
46 .bypass_reg = _sr, \
47 .bypass_mask = _sm, \
48 } \
49
50 static const struct linear_range dcdc1_dcdc2_ranges[] = {
51 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
52 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
53 };
54
55 static const struct linear_range ldo1_dcdc3_ranges[] = {
56 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
57 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
58 };
59
60 static const struct linear_range dcdc4_ranges[] = {
61 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
62 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
63 };
64
tps65218_pmic_set_voltage_sel(struct regulator_dev * dev,unsigned selector)65 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
66 unsigned selector)
67 {
68 int ret;
69 struct tps65218 *tps = rdev_get_drvdata(dev);
70 unsigned int rid = rdev_get_id(dev);
71
72 /* Set the voltage based on vsel value and write protect level is 2 */
73 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
74 selector, TPS65218_PROTECT_L1);
75
76 /* Set GO bit for DCDC1/2 to initiate voltage transistion */
77 switch (rid) {
78 case TPS65218_DCDC_1:
79 case TPS65218_DCDC_2:
80 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
81 TPS65218_SLEW_RATE_GO,
82 TPS65218_SLEW_RATE_GO,
83 TPS65218_PROTECT_L1);
84 break;
85 }
86
87 return ret;
88 }
89
tps65218_pmic_enable(struct regulator_dev * dev)90 static int tps65218_pmic_enable(struct regulator_dev *dev)
91 {
92 struct tps65218 *tps = rdev_get_drvdata(dev);
93 int rid = rdev_get_id(dev);
94
95 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
96 return -EINVAL;
97
98 /* Enable the regulator and password protection is level 1 */
99 return tps65218_set_bits(tps, dev->desc->enable_reg,
100 dev->desc->enable_mask, dev->desc->enable_mask,
101 TPS65218_PROTECT_L1);
102 }
103
tps65218_pmic_disable(struct regulator_dev * dev)104 static int tps65218_pmic_disable(struct regulator_dev *dev)
105 {
106 struct tps65218 *tps = rdev_get_drvdata(dev);
107 int rid = rdev_get_id(dev);
108
109 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
110 return -EINVAL;
111
112 /* Disable the regulator and password protection is level 1 */
113 return tps65218_clear_bits(tps, dev->desc->enable_reg,
114 dev->desc->enable_mask, TPS65218_PROTECT_L1);
115 }
116
tps65218_pmic_set_suspend_enable(struct regulator_dev * dev)117 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev)
118 {
119 struct tps65218 *tps = rdev_get_drvdata(dev);
120 unsigned int rid = rdev_get_id(dev);
121
122 if (rid > TPS65218_LDO_1)
123 return -EINVAL;
124
125 return tps65218_clear_bits(tps, dev->desc->bypass_reg,
126 dev->desc->bypass_mask,
127 TPS65218_PROTECT_L1);
128 }
129
tps65218_pmic_set_suspend_disable(struct regulator_dev * dev)130 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)
131 {
132 struct tps65218 *tps = rdev_get_drvdata(dev);
133 unsigned int rid = rdev_get_id(dev);
134
135 if (rid > TPS65218_LDO_1)
136 return -EINVAL;
137
138 /*
139 * Certain revisions of TPS65218 will need to have DCDC3 regulator
140 * enabled always, otherwise an immediate system reboot will occur
141 * during poweroff.
142 */
143 if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1)
144 return 0;
145
146 if (!tps->strobes[rid]) {
147 if (rid == TPS65218_DCDC_3)
148 tps->strobes[rid] = 3;
149 else
150 return -EINVAL;
151 }
152
153 return tps65218_set_bits(tps, dev->desc->bypass_reg,
154 dev->desc->bypass_mask,
155 tps->strobes[rid], TPS65218_PROTECT_L1);
156 }
157
158 /* Operations permitted on DCDC1, DCDC2 */
159 static const struct regulator_ops tps65218_dcdc12_ops = {
160 .is_enabled = regulator_is_enabled_regmap,
161 .enable = tps65218_pmic_enable,
162 .disable = tps65218_pmic_disable,
163 .get_voltage_sel = regulator_get_voltage_sel_regmap,
164 .set_voltage_sel = tps65218_pmic_set_voltage_sel,
165 .list_voltage = regulator_list_voltage_linear_range,
166 .map_voltage = regulator_map_voltage_linear_range,
167 .set_voltage_time_sel = regulator_set_voltage_time_sel,
168 .set_suspend_enable = tps65218_pmic_set_suspend_enable,
169 .set_suspend_disable = tps65218_pmic_set_suspend_disable,
170 };
171
172 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
173 static const struct regulator_ops tps65218_ldo1_dcdc34_ops = {
174 .is_enabled = regulator_is_enabled_regmap,
175 .enable = tps65218_pmic_enable,
176 .disable = tps65218_pmic_disable,
177 .get_voltage_sel = regulator_get_voltage_sel_regmap,
178 .set_voltage_sel = tps65218_pmic_set_voltage_sel,
179 .list_voltage = regulator_list_voltage_linear_range,
180 .map_voltage = regulator_map_voltage_linear_range,
181 .set_suspend_enable = tps65218_pmic_set_suspend_enable,
182 .set_suspend_disable = tps65218_pmic_set_suspend_disable,
183 };
184
185 static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 };
186
tps65218_pmic_set_input_current_lim(struct regulator_dev * dev,int lim_uA)187 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
188 int lim_uA)
189 {
190 unsigned int index = 0;
191 unsigned int num_currents = ARRAY_SIZE(ls3_currents);
192 struct tps65218 *tps = rdev_get_drvdata(dev);
193
194 while (index < num_currents && ls3_currents[index] != lim_uA)
195 index++;
196
197 if (index == num_currents)
198 return -EINVAL;
199
200 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
201 index << __builtin_ctz(dev->desc->csel_mask),
202 TPS65218_PROTECT_L1);
203 }
204
tps65218_pmic_set_current_limit(struct regulator_dev * dev,int min_uA,int max_uA)205 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
206 int min_uA, int max_uA)
207 {
208 int index = 0;
209 unsigned int num_currents = ARRAY_SIZE(ls3_currents);
210 struct tps65218 *tps = rdev_get_drvdata(dev);
211
212 while (index < num_currents && ls3_currents[index] <= max_uA)
213 index++;
214
215 index--;
216
217 if (index < 0 || ls3_currents[index] < min_uA)
218 return -EINVAL;
219
220 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
221 index << __builtin_ctz(dev->desc->csel_mask),
222 TPS65218_PROTECT_L1);
223 }
224
225 static const struct regulator_ops tps65218_ls23_ops = {
226 .is_enabled = regulator_is_enabled_regmap,
227 .enable = tps65218_pmic_enable,
228 .disable = tps65218_pmic_disable,
229 .set_input_current_limit = tps65218_pmic_set_input_current_lim,
230 .set_current_limit = tps65218_pmic_set_current_limit,
231 .get_current_limit = regulator_get_current_limit_regmap,
232 };
233
234 /* Operations permitted on DCDC5, DCDC6 */
235 static const struct regulator_ops tps65218_dcdc56_pmic_ops = {
236 .is_enabled = regulator_is_enabled_regmap,
237 .enable = tps65218_pmic_enable,
238 .disable = tps65218_pmic_disable,
239 .set_suspend_enable = tps65218_pmic_set_suspend_enable,
240 .set_suspend_disable = tps65218_pmic_set_suspend_disable,
241 };
242
243 static const struct regulator_desc regulators[] = {
244 TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1,
245 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
246 TPS65218_REG_CONTROL_DCDC1,
247 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
248 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
249 2, 4000, 0, TPS65218_REG_SEQ3,
250 TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0),
251 TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2,
252 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
253 TPS65218_REG_CONTROL_DCDC2,
254 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
255 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
256 2, 4000, 0, TPS65218_REG_SEQ3,
257 TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0),
258 TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3,
259 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
260 TPS65218_REG_CONTROL_DCDC3,
261 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
262 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
263 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK,
264 NULL, 0),
265 TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4,
266 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53,
267 TPS65218_REG_CONTROL_DCDC4,
268 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
269 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
270 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK,
271 NULL, 0),
272 TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5,
273 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,
274 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0,
275 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5,
276 TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0),
277 TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6,
278 REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,
279 -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0,
280 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5,
281 TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0),
282 TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1,
283 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
284 TPS65218_REG_CONTROL_LDO1,
285 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
286 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
287 2, 0, 0, TPS65218_REG_SEQ6,
288 TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0),
289 TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2,
290 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,
291 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN,
292 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK,
293 NULL, 0, 0, 0, 0, 0, ls3_currents,
294 ARRAY_SIZE(ls3_currents)),
295 TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3,
296 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,
297 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN,
298 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK,
299 NULL, 0, 0, 0, 0, 0, ls3_currents,
300 ARRAY_SIZE(ls3_currents)),
301 };
302
tps65218_regulator_probe(struct platform_device * pdev)303 static int tps65218_regulator_probe(struct platform_device *pdev)
304 {
305 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
306 struct regulator_dev *rdev;
307 struct regulator_config config = { };
308 int i, ret;
309 unsigned int val;
310
311 config.dev = &pdev->dev;
312 config.dev->of_node = tps->dev->of_node;
313 config.driver_data = tps;
314 config.regmap = tps->regmap;
315
316 /* Allocate memory for strobes */
317 tps->strobes = devm_kcalloc(&pdev->dev,
318 TPS65218_NUM_REGULATOR, sizeof(u8),
319 GFP_KERNEL);
320 if (!tps->strobes)
321 return -ENOMEM;
322
323 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
324 rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
325 &config);
326 if (IS_ERR(rdev)) {
327 dev_err(tps->dev, "failed to register %s regulator\n",
328 pdev->name);
329 return PTR_ERR(rdev);
330 }
331
332 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val);
333 if (ret)
334 return ret;
335
336 tps->strobes[i] = val & regulators[i].bypass_mask;
337 }
338
339 return 0;
340 }
341
342 static const struct platform_device_id tps65218_regulator_id_table[] = {
343 { .name = "tps65218-regulator" },
344 { /* sentinel */ }
345 };
346 MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table);
347
348 static struct platform_driver tps65218_regulator_driver = {
349 .driver = {
350 .name = "tps65218-pmic",
351 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
352 },
353 .probe = tps65218_regulator_probe,
354 .id_table = tps65218_regulator_id_table,
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");
363