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/mod_devicetable.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/init.h>
15 #include <linux/err.h>
16 #include <linux/platform_device.h>
17 #include <linux/regmap.h>
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
23 #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
24 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \
25 _ct, _ncl) \
26 { \
27 .name = _name, \
28 .of_match = _of, \
29 .id = _id, \
30 .ops = &_ops, \
31 .n_voltages = _n, \
32 .type = _type, \
33 .owner = THIS_MODULE, \
34 .vsel_reg = _vr, \
35 .vsel_mask = _vm, \
36 .csel_reg = _cr, \
37 .csel_mask = _cm, \
38 .curr_table = _ct, \
39 .n_current_limits = _ncl, \
40 .enable_reg = _er, \
41 .enable_mask = _em, \
42 .volt_table = NULL, \
43 .linear_ranges = _lr, \
44 .n_linear_ranges = _nlr, \
45 .ramp_delay = _delay, \
46 .fixed_uV = _fuv, \
47 .bypass_reg = _sr, \
48 .bypass_mask = _sm, \
49 } \
50
51 static const struct linear_range dcdc1_dcdc2_ranges[] = {
52 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
53 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
54 };
55
56 static const struct linear_range ldo1_dcdc3_ranges[] = {
57 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
58 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
59 };
60
61 static const struct linear_range dcdc4_ranges[] = {
62 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
63 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
64 };
65
tps65218_pmic_set_voltage_sel(struct regulator_dev * dev,unsigned selector)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
tps65218_pmic_enable(struct regulator_dev * dev)91 static int tps65218_pmic_enable(struct regulator_dev *dev)
92 {
93 struct tps65218 *tps = rdev_get_drvdata(dev);
94 int rid = rdev_get_id(dev);
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
tps65218_pmic_disable(struct regulator_dev * dev)105 static int tps65218_pmic_disable(struct regulator_dev *dev)
106 {
107 struct tps65218 *tps = rdev_get_drvdata(dev);
108 int rid = rdev_get_id(dev);
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
tps65218_pmic_set_suspend_enable(struct regulator_dev * dev)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
123 if (rid > TPS65218_LDO_1)
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
tps65218_pmic_set_suspend_disable(struct regulator_dev * dev)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
136 if (rid > TPS65218_LDO_1)
137 return -EINVAL;
138
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
147 if (!tps->strobes[rid]) {
148 if (rid == TPS65218_DCDC_3)
149 tps->strobes[rid] = 3;
150 else
151 return -EINVAL;
152 }
153
154 return tps65218_set_bits(tps, dev->desc->bypass_reg,
155 dev->desc->bypass_mask,
156 tps->strobes[rid], TPS65218_PROTECT_L1);
157 }
158
159 /* Operations permitted on DCDC1, DCDC2 */
160 static const struct regulator_ops tps65218_dcdc12_ops = {
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,
168 .set_voltage_time_sel = regulator_set_voltage_time_sel,
169 .set_suspend_enable = tps65218_pmic_set_suspend_enable,
170 .set_suspend_disable = tps65218_pmic_set_suspend_disable,
171 };
172
173 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
174 static const struct regulator_ops tps65218_ldo1_dcdc34_ops = {
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,
182 .set_suspend_enable = tps65218_pmic_set_suspend_enable,
183 .set_suspend_disable = tps65218_pmic_set_suspend_disable,
184 };
185
186 static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 };
187
tps65218_pmic_set_input_current_lim(struct regulator_dev * dev,int lim_uA)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,
202 index << __builtin_ctz(dev->desc->csel_mask),
203 TPS65218_PROTECT_L1);
204 }
205
tps65218_pmic_set_current_limit(struct regulator_dev * dev,int min_uA,int max_uA)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
213 while (index < num_currents && ls3_currents[index] <= max_uA)
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,
222 index << __builtin_ctz(dev->desc->csel_mask),
223 TPS65218_PROTECT_L1);
224 }
225
226 static const struct regulator_ops tps65218_ls23_ops = {
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,
232 .get_current_limit = regulator_get_current_limit_regmap,
233 };
234
235 /* Operations permitted on DCDC5, DCDC6 */
236 static const struct regulator_ops tps65218_dcdc56_pmic_ops = {
237 .is_enabled = regulator_is_enabled_regmap,
238 .enable = tps65218_pmic_enable,
239 .disable = tps65218_pmic_disable,
240 .set_suspend_enable = tps65218_pmic_set_suspend_enable,
241 .set_suspend_disable = tps65218_pmic_set_suspend_disable,
242 };
243
244 static const struct regulator_desc regulators[] = {
245 TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1,
246 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
247 TPS65218_REG_CONTROL_DCDC1,
248 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
249 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
250 2, 4000, 0, TPS65218_REG_SEQ3,
251 TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0),
252 TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2,
253 REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
254 TPS65218_REG_CONTROL_DCDC2,
255 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
256 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
257 2, 4000, 0, TPS65218_REG_SEQ3,
258 TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0),
259 TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3,
260 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
261 TPS65218_REG_CONTROL_DCDC3,
262 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
263 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
264 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK,
265 NULL, 0),
266 TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4,
267 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53,
268 TPS65218_REG_CONTROL_DCDC4,
269 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
270 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
271 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK,
272 NULL, 0),
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,
277 TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0),
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,
282 TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0),
283 TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1,
284 REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
285 TPS65218_REG_CONTROL_LDO1,
286 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
287 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
288 2, 0, 0, TPS65218_REG_SEQ6,
289 TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0),
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,
294 NULL, 0, 0, 0, 0, 0, ls3_currents,
295 ARRAY_SIZE(ls3_currents)),
296 TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3,
297 REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,
298 TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN,
299 TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK,
300 NULL, 0, 0, 0, 0, 0, ls3_currents,
301 ARRAY_SIZE(ls3_currents)),
302 };
303
tps65218_regulator_probe(struct platform_device * pdev)304 static int tps65218_regulator_probe(struct platform_device *pdev)
305 {
306 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
307 struct regulator_dev *rdev;
308 struct regulator_config config = { };
309 int i, ret;
310 unsigned int val;
311
312 config.dev = &pdev->dev;
313 config.dev->of_node = tps->dev->of_node;
314 config.driver_data = tps;
315 config.regmap = tps->regmap;
316
317 /* Allocate memory for strobes */
318 tps->strobes = devm_kcalloc(&pdev->dev,
319 TPS65218_NUM_REGULATOR, sizeof(u8),
320 GFP_KERNEL);
321 if (!tps->strobes)
322 return -ENOMEM;
323
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 }
332
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 }
339
340 return 0;
341 }
342
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
349 static struct platform_driver tps65218_regulator_driver = {
350 .driver = {
351 .name = "tps65218-pmic",
352 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
353 },
354 .probe = tps65218_regulator_probe,
355 .id_table = tps65218_regulator_id_table,
356 };
357
358 module_platform_driver(tps65218_regulator_driver);
359
360 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
361 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
362 MODULE_ALIAS("platform:tps65218-pmic");
363 MODULE_LICENSE("GPL v2");
364