1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // tps65219-regulator.c
4 //
5 // Regulator driver for TPS65219 PMIC
6 //
7 // Copyright (C) 2022 BayLibre Incorporated - https://www.baylibre.com/
8 //
9 // This implementation derived from tps65218 authored by
10 // "J Keerthy <j-keerthy@ti.com>"
11 //
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/device.h>
16 #include <linux/init.h>
17 #include <linux/err.h>
18 #include <linux/of.h>
19 #include <linux/platform_device.h>
20 #include <linux/regmap.h>
21 #include <linux/regulator/of_regulator.h>
22 #include <linux/regulator/driver.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/mfd/tps65219.h>
25
26 struct tps65219_regulator_irq_type {
27 const char *irq_name;
28 const char *regulator_name;
29 const char *event_name;
30 unsigned long event;
31 };
32
33 static struct tps65219_regulator_irq_type tps65219_regulator_irq_types[] = {
34 { "LDO3_SCG", "LDO3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
35 { "LDO3_OC", "LDO3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
36 { "LDO3_UV", "LDO3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
37 { "LDO4_SCG", "LDO4", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
38 { "LDO4_OC", "LDO4", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
39 { "LDO4_UV", "LDO4", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
40 { "LDO1_SCG", "LDO1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
41 { "LDO1_OC", "LDO1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
42 { "LDO1_UV", "LDO1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
43 { "LDO2_SCG", "LDO2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
44 { "LDO2_OC", "LDO2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
45 { "LDO2_UV", "LDO2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
46 { "BUCK3_SCG", "BUCK3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
47 { "BUCK3_OC", "BUCK3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
48 { "BUCK3_NEG_OC", "BUCK3", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
49 { "BUCK3_UV", "BUCK3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
50 { "BUCK1_SCG", "BUCK1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
51 { "BUCK1_OC", "BUCK1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
52 { "BUCK1_NEG_OC", "BUCK1", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
53 { "BUCK1_UV", "BUCK1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
54 { "BUCK2_SCG", "BUCK2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
55 { "BUCK2_OC", "BUCK2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
56 { "BUCK2_NEG_OC", "BUCK2", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
57 { "BUCK2_UV", "BUCK2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
58 { "BUCK1_RV", "BUCK1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
59 { "BUCK2_RV", "BUCK2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
60 { "BUCK3_RV", "BUCK3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
61 { "LDO1_RV", "LDO1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
62 { "LDO2_RV", "LDO2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
63 { "LDO3_RV", "LDO3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
64 { "LDO4_RV", "LDO4", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
65 { "BUCK1_RV_SD", "BUCK1", "residual voltage on shutdown",
66 REGULATOR_EVENT_OVER_VOLTAGE_WARN },
67 { "BUCK2_RV_SD", "BUCK2", "residual voltage on shutdown",
68 REGULATOR_EVENT_OVER_VOLTAGE_WARN },
69 { "BUCK3_RV_SD", "BUCK3", "residual voltage on shutdown",
70 REGULATOR_EVENT_OVER_VOLTAGE_WARN },
71 { "LDO1_RV_SD", "LDO1", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
72 { "LDO2_RV_SD", "LDO2", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
73 { "LDO3_RV_SD", "LDO3", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
74 { "LDO4_RV_SD", "LDO4", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
75 { "SENSOR_3_WARM", "SENSOR3", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN},
76 { "SENSOR_2_WARM", "SENSOR2", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
77 { "SENSOR_1_WARM", "SENSOR1", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
78 { "SENSOR_0_WARM", "SENSOR0", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
79 { "SENSOR_3_HOT", "SENSOR3", "hot temperature", REGULATOR_EVENT_OVER_TEMP},
80 { "SENSOR_2_HOT", "SENSOR2", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
81 { "SENSOR_1_HOT", "SENSOR1", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
82 { "SENSOR_0_HOT", "SENSOR0", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
83 { "TIMEOUT", "", "", REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE },
84 };
85
86 struct tps65219_regulator_irq_data {
87 struct device *dev;
88 struct tps65219_regulator_irq_type *type;
89 struct regulator_dev *rdev;
90 };
91
92 #define TPS65219_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
93 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, \
94 _ct, _ncl, _bpm) \
95 { \
96 .name = _name, \
97 .of_match = _of, \
98 .regulators_node = of_match_ptr("regulators"), \
99 .supply_name = _of, \
100 .id = _id, \
101 .ops = &(_ops), \
102 .n_voltages = _n, \
103 .type = _type, \
104 .owner = THIS_MODULE, \
105 .vsel_reg = _vr, \
106 .vsel_mask = _vm, \
107 .csel_reg = _cr, \
108 .csel_mask = _cm, \
109 .curr_table = _ct, \
110 .n_current_limits = _ncl, \
111 .enable_reg = _er, \
112 .enable_mask = _em, \
113 .volt_table = NULL, \
114 .linear_ranges = _lr, \
115 .n_linear_ranges = _nlr, \
116 .ramp_delay = _delay, \
117 .fixed_uV = _fuv, \
118 .bypass_reg = _vr, \
119 .bypass_mask = _bpm, \
120 } \
121
122 static const struct linear_range bucks_ranges[] = {
123 REGULATOR_LINEAR_RANGE(600000, 0x0, 0x1f, 25000),
124 REGULATOR_LINEAR_RANGE(1400000, 0x20, 0x33, 100000),
125 REGULATOR_LINEAR_RANGE(3400000, 0x34, 0x3f, 0),
126 };
127
128 static const struct linear_range ldos_1_2_ranges[] = {
129 REGULATOR_LINEAR_RANGE(600000, 0x0, 0x37, 50000),
130 REGULATOR_LINEAR_RANGE(3400000, 0x38, 0x3f, 0),
131 };
132
133 static const struct linear_range ldos_3_4_ranges[] = {
134 REGULATOR_LINEAR_RANGE(1200000, 0x0, 0xC, 0),
135 REGULATOR_LINEAR_RANGE(1250000, 0xD, 0x35, 50000),
136 REGULATOR_LINEAR_RANGE(3300000, 0x36, 0x3F, 0),
137 };
138
tps65219_set_mode(struct regulator_dev * dev,unsigned int mode)139 static int tps65219_set_mode(struct regulator_dev *dev, unsigned int mode)
140 {
141 struct tps65219 *tps = rdev_get_drvdata(dev);
142
143 switch (mode) {
144 case REGULATOR_MODE_NORMAL:
145 return regmap_set_bits(tps->regmap, TPS65219_REG_STBY_1_CONFIG,
146 dev->desc->enable_mask);
147
148 case REGULATOR_MODE_STANDBY:
149 return regmap_clear_bits(tps->regmap,
150 TPS65219_REG_STBY_1_CONFIG,
151 dev->desc->enable_mask);
152 default:
153 return -EINVAL;
154 }
155 }
156
tps65219_get_mode(struct regulator_dev * dev)157 static unsigned int tps65219_get_mode(struct regulator_dev *dev)
158 {
159 struct tps65219 *tps = rdev_get_drvdata(dev);
160 unsigned int rid = rdev_get_id(dev);
161 int ret, value = 0;
162
163 ret = regmap_read(tps->regmap, TPS65219_REG_STBY_1_CONFIG, &value);
164 if (ret) {
165 dev_dbg(tps->dev, "%s failed for regulator %s: %d ",
166 __func__, dev->desc->name, ret);
167 return ret;
168 }
169 value = (value & BIT(rid)) >> rid;
170 if (value)
171 return REGULATOR_MODE_STANDBY;
172 else
173 return REGULATOR_MODE_NORMAL;
174 }
175
176 /* Operations permitted on BUCK1/2/3 */
177 static const struct regulator_ops tps65219_bucks_ops = {
178 .is_enabled = regulator_is_enabled_regmap,
179 .enable = regulator_enable_regmap,
180 .disable = regulator_disable_regmap,
181 .set_mode = tps65219_set_mode,
182 .get_mode = tps65219_get_mode,
183 .get_voltage_sel = regulator_get_voltage_sel_regmap,
184 .set_voltage_sel = regulator_set_voltage_sel_regmap,
185 .list_voltage = regulator_list_voltage_linear_range,
186 .map_voltage = regulator_map_voltage_linear_range,
187 .set_voltage_time_sel = regulator_set_voltage_time_sel,
188
189 };
190
191 /* Operations permitted on LDO1/2 */
192 static const struct regulator_ops tps65219_ldos_1_2_ops = {
193 .is_enabled = regulator_is_enabled_regmap,
194 .enable = regulator_enable_regmap,
195 .disable = regulator_disable_regmap,
196 .set_mode = tps65219_set_mode,
197 .get_mode = tps65219_get_mode,
198 .get_voltage_sel = regulator_get_voltage_sel_regmap,
199 .set_voltage_sel = regulator_set_voltage_sel_regmap,
200 .list_voltage = regulator_list_voltage_linear_range,
201 .map_voltage = regulator_map_voltage_linear_range,
202 .set_bypass = regulator_set_bypass_regmap,
203 .get_bypass = regulator_get_bypass_regmap,
204 };
205
206 /* Operations permitted on LDO3/4 */
207 static const struct regulator_ops tps65219_ldos_3_4_ops = {
208 .is_enabled = regulator_is_enabled_regmap,
209 .enable = regulator_enable_regmap,
210 .disable = regulator_disable_regmap,
211 .set_mode = tps65219_set_mode,
212 .get_mode = tps65219_get_mode,
213 .get_voltage_sel = regulator_get_voltage_sel_regmap,
214 .set_voltage_sel = regulator_set_voltage_sel_regmap,
215 .list_voltage = regulator_list_voltage_linear_range,
216 .map_voltage = regulator_map_voltage_linear_range,
217 };
218
219 static const struct regulator_desc regulators[] = {
220 TPS65219_REGULATOR("BUCK1", "buck1", TPS65219_BUCK_1,
221 REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
222 TPS65219_REG_BUCK1_VOUT,
223 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
224 TPS65219_REG_ENABLE_CTRL,
225 TPS65219_ENABLE_BUCK1_EN_MASK, 0, 0, bucks_ranges,
226 3, 4000, 0, NULL, 0, 0),
227 TPS65219_REGULATOR("BUCK2", "buck2", TPS65219_BUCK_2,
228 REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
229 TPS65219_REG_BUCK2_VOUT,
230 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
231 TPS65219_REG_ENABLE_CTRL,
232 TPS65219_ENABLE_BUCK2_EN_MASK, 0, 0, bucks_ranges,
233 3, 4000, 0, NULL, 0, 0),
234 TPS65219_REGULATOR("BUCK3", "buck3", TPS65219_BUCK_3,
235 REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
236 TPS65219_REG_BUCK3_VOUT,
237 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
238 TPS65219_REG_ENABLE_CTRL,
239 TPS65219_ENABLE_BUCK3_EN_MASK, 0, 0, bucks_ranges,
240 3, 0, 0, NULL, 0, 0),
241 TPS65219_REGULATOR("LDO1", "ldo1", TPS65219_LDO_1,
242 REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64,
243 TPS65219_REG_LDO1_VOUT,
244 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
245 TPS65219_REG_ENABLE_CTRL,
246 TPS65219_ENABLE_LDO1_EN_MASK, 0, 0, ldos_1_2_ranges,
247 2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK),
248 TPS65219_REGULATOR("LDO2", "ldo2", TPS65219_LDO_2,
249 REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64,
250 TPS65219_REG_LDO2_VOUT,
251 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
252 TPS65219_REG_ENABLE_CTRL,
253 TPS65219_ENABLE_LDO2_EN_MASK, 0, 0, ldos_1_2_ranges,
254 2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK),
255 TPS65219_REGULATOR("LDO3", "ldo3", TPS65219_LDO_3,
256 REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64,
257 TPS65219_REG_LDO3_VOUT,
258 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
259 TPS65219_REG_ENABLE_CTRL,
260 TPS65219_ENABLE_LDO3_EN_MASK, 0, 0, ldos_3_4_ranges,
261 3, 0, 0, NULL, 0, 0),
262 TPS65219_REGULATOR("LDO4", "ldo4", TPS65219_LDO_4,
263 REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64,
264 TPS65219_REG_LDO4_VOUT,
265 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
266 TPS65219_REG_ENABLE_CTRL,
267 TPS65219_ENABLE_LDO4_EN_MASK, 0, 0, ldos_3_4_ranges,
268 3, 0, 0, NULL, 0, 0),
269 };
270
tps65219_regulator_irq_handler(int irq,void * data)271 static irqreturn_t tps65219_regulator_irq_handler(int irq, void *data)
272 {
273 struct tps65219_regulator_irq_data *irq_data = data;
274
275 if (irq_data->type->event_name[0] == '\0') {
276 /* This is the timeout interrupt no specific regulator */
277 dev_err(irq_data->dev,
278 "System was put in shutdown due to timeout during an active or standby transition.\n");
279 return IRQ_HANDLED;
280 }
281
282 regulator_notifier_call_chain(irq_data->rdev,
283 irq_data->type->event, NULL);
284
285 dev_err(irq_data->dev, "Error IRQ trap %s for %s\n",
286 irq_data->type->event_name, irq_data->type->regulator_name);
287 return IRQ_HANDLED;
288 }
289
tps65219_get_rdev_by_name(const char * regulator_name,struct regulator_dev * rdevtbl[7],struct regulator_dev ** dev)290 static int tps65219_get_rdev_by_name(const char *regulator_name,
291 struct regulator_dev *rdevtbl[7],
292 struct regulator_dev **dev)
293 {
294 int i;
295
296 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
297 if (strcmp(regulator_name, regulators[i].name) == 0) {
298 *dev = rdevtbl[i];
299 return 0;
300 }
301 }
302 return -EINVAL;
303 }
304
tps65219_regulator_probe(struct platform_device * pdev)305 static int tps65219_regulator_probe(struct platform_device *pdev)
306 {
307 struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent);
308 struct regulator_dev *rdev;
309 struct regulator_config config = { };
310 int i;
311 int error;
312 int irq;
313 struct tps65219_regulator_irq_data *irq_data;
314 struct tps65219_regulator_irq_type *irq_type;
315 struct regulator_dev *rdevtbl[7];
316
317 config.dev = tps->dev;
318 config.driver_data = tps;
319 config.regmap = tps->regmap;
320
321 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
322 dev_dbg(tps->dev, "%s regul i= %d START", __func__, i);
323 rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
324 &config);
325 if (IS_ERR(rdev)) {
326 dev_err(tps->dev, "failed to register %s regulator\n",
327 regulators[i].name);
328 return PTR_ERR(rdev);
329 }
330 rdevtbl[i] = rdev;
331 dev_dbg(tps->dev, "%s regul i= %d COMPLETED", __func__, i);
332 }
333
334 irq_data = devm_kmalloc(tps->dev,
335 ARRAY_SIZE(tps65219_regulator_irq_types) *
336 sizeof(struct tps65219_regulator_irq_data),
337 GFP_KERNEL);
338 if (!irq_data)
339 return -ENOMEM;
340
341 for (i = 0; i < ARRAY_SIZE(tps65219_regulator_irq_types); ++i) {
342 irq_type = &tps65219_regulator_irq_types[i];
343
344 irq = platform_get_irq_byname(pdev, irq_type->irq_name);
345 if (irq < 0)
346 return -EINVAL;
347
348 irq_data[i].dev = tps->dev;
349 irq_data[i].type = irq_type;
350
351 tps65219_get_rdev_by_name(irq_type->regulator_name, rdevtbl, &rdev);
352 if (IS_ERR(rdev)) {
353 dev_err(tps->dev, "Failed to get rdev for %s\n",
354 irq_type->regulator_name);
355 return -EINVAL;
356 }
357 irq_data[i].rdev = rdev;
358
359 error = devm_request_threaded_irq(tps->dev, irq, NULL,
360 tps65219_regulator_irq_handler,
361 IRQF_ONESHOT,
362 irq_type->irq_name,
363 &irq_data[i]);
364 if (error) {
365 dev_err(tps->dev, "failed to request %s IRQ %d: %d\n",
366 irq_type->irq_name, irq, error);
367 return error;
368 }
369 }
370
371 return 0;
372 }
373
374 static const struct platform_device_id tps65219_regulator_id_table[] = {
375 { "tps65219-regulator", },
376 { /* sentinel */ }
377 };
378 MODULE_DEVICE_TABLE(platform, tps65219_regulator_id_table);
379
380 static struct platform_driver tps65219_regulator_driver = {
381 .driver = {
382 .name = "tps65219-pmic",
383 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
384 },
385 .probe = tps65219_regulator_probe,
386 .id_table = tps65219_regulator_id_table,
387 };
388
389 module_platform_driver(tps65219_regulator_driver);
390
391 MODULE_AUTHOR("Jerome Neanne <j-neanne@baylibre.com>");
392 MODULE_DESCRIPTION("TPS65219 voltage regulator driver");
393 MODULE_ALIAS("platform:tps65219-pmic");
394 MODULE_LICENSE("GPL");
395
