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1// SPDX-License-Identifier: GPL-2.0-only
2//
3// Copyright (C) 2020 MediaTek Inc.
4//
5// Author: Gene Chen <gene_chen@richtek.com>
6
7#include <linux/init.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13#include <linux/regulator/driver.h>
14#include <linux/regulator/machine.h>
15
16#include <dt-bindings/regulator/mediatek,mt6360-regulator.h>
17
18enum {
19 MT6360_REGULATOR_BUCK1 = 0,
20 MT6360_REGULATOR_BUCK2,
21 MT6360_REGULATOR_LDO6,
22 MT6360_REGULATOR_LDO7,
23 MT6360_REGULATOR_LDO1,
24 MT6360_REGULATOR_LDO2,
25 MT6360_REGULATOR_LDO3,
26 MT6360_REGULATOR_LDO5,
27 MT6360_REGULATOR_MAX,
28};
29
30struct mt6360_irq_mapping {
31 const char *name;
32 irq_handler_t handler;
33};
34
35struct mt6360_regulator_desc {
36 const struct regulator_desc desc;
37 unsigned int mode_reg;
38 unsigned int mode_mask;
39 unsigned int state_reg;
40 unsigned int state_mask;
41 const struct mt6360_irq_mapping *irq_tables;
42 int irq_table_size;
43};
44
45struct mt6360_regulator_data {
46 struct device *dev;
47 struct regmap *regmap;
48};
49
50static irqreturn_t mt6360_pgb_event_handler(int irq, void *data)
51{
52 struct regulator_dev *rdev = data;
53
54 regulator_notifier_call_chain(rdev, REGULATOR_EVENT_FAIL, NULL);
55 return IRQ_HANDLED;
56}
57
58static irqreturn_t mt6360_oc_event_handler(int irq, void *data)
59{
60 struct regulator_dev *rdev = data;
61
62 regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_CURRENT, NULL);
63 return IRQ_HANDLED;
64}
65
66static irqreturn_t mt6360_ov_event_handler(int irq, void *data)
67{
68 struct regulator_dev *rdev = data;
69
70 regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL);
71 return IRQ_HANDLED;
72}
73
74static irqreturn_t mt6360_uv_event_handler(int irq, void *data)
75{
76 struct regulator_dev *rdev = data;
77
78 regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL);
79 return IRQ_HANDLED;
80}
81
82static const struct mt6360_irq_mapping buck1_irq_tbls[] = {
83 { "buck1_pgb_evt", mt6360_pgb_event_handler },
84 { "buck1_oc_evt", mt6360_oc_event_handler },
85 { "buck1_ov_evt", mt6360_ov_event_handler },
86 { "buck1_uv_evt", mt6360_uv_event_handler },
87};
88
89static const struct mt6360_irq_mapping buck2_irq_tbls[] = {
90 { "buck2_pgb_evt", mt6360_pgb_event_handler },
91 { "buck2_oc_evt", mt6360_oc_event_handler },
92 { "buck2_ov_evt", mt6360_ov_event_handler },
93 { "buck2_uv_evt", mt6360_uv_event_handler },
94};
95
96static const struct mt6360_irq_mapping ldo6_irq_tbls[] = {
97 { "ldo6_pgb_evt", mt6360_pgb_event_handler },
98 { "ldo6_oc_evt", mt6360_oc_event_handler },
99};
100
101static const struct mt6360_irq_mapping ldo7_irq_tbls[] = {
102 { "ldo7_pgb_evt", mt6360_pgb_event_handler },
103 { "ldo7_oc_evt", mt6360_oc_event_handler },
104};
105
106static const struct mt6360_irq_mapping ldo1_irq_tbls[] = {
107 { "ldo1_pgb_evt", mt6360_pgb_event_handler },
108 { "ldo1_oc_evt", mt6360_oc_event_handler },
109};
110
111static const struct mt6360_irq_mapping ldo2_irq_tbls[] = {
112 { "ldo2_pgb_evt", mt6360_pgb_event_handler },
113 { "ldo2_oc_evt", mt6360_oc_event_handler },
114};
115
116static const struct mt6360_irq_mapping ldo3_irq_tbls[] = {
117 { "ldo3_pgb_evt", mt6360_pgb_event_handler },
118 { "ldo3_oc_evt", mt6360_oc_event_handler },
119};
120
121static const struct mt6360_irq_mapping ldo5_irq_tbls[] = {
122 { "ldo5_pgb_evt", mt6360_pgb_event_handler },
123 { "ldo5_oc_evt", mt6360_oc_event_handler },
124};
125
126static const struct linear_range buck_vout_ranges[] = {
127 REGULATOR_LINEAR_RANGE(300000, 0x00, 0xc7, 5000),
128 REGULATOR_LINEAR_RANGE(1300000, 0xc8, 0xff, 0),
129};
130
131static const struct linear_range ldo_vout_ranges1[] = {
132 REGULATOR_LINEAR_RANGE(500000, 0x00, 0x09, 10000),
133 REGULATOR_LINEAR_RANGE(600000, 0x0a, 0x10, 0),
134 REGULATOR_LINEAR_RANGE(610000, 0x11, 0x19, 10000),
135 REGULATOR_LINEAR_RANGE(700000, 0x1a, 0x20, 0),
136 REGULATOR_LINEAR_RANGE(710000, 0x21, 0x29, 10000),
137 REGULATOR_LINEAR_RANGE(800000, 0x2a, 0x30, 0),
138 REGULATOR_LINEAR_RANGE(810000, 0x31, 0x39, 10000),
139 REGULATOR_LINEAR_RANGE(900000, 0x3a, 0x40, 0),
140 REGULATOR_LINEAR_RANGE(910000, 0x41, 0x49, 10000),
141 REGULATOR_LINEAR_RANGE(1000000, 0x4a, 0x50, 0),
142 REGULATOR_LINEAR_RANGE(1010000, 0x51, 0x59, 10000),
143 REGULATOR_LINEAR_RANGE(1100000, 0x5a, 0x60, 0),
144 REGULATOR_LINEAR_RANGE(1110000, 0x61, 0x69, 10000),
145 REGULATOR_LINEAR_RANGE(1200000, 0x6a, 0x70, 0),
146 REGULATOR_LINEAR_RANGE(1210000, 0x71, 0x79, 10000),
147 REGULATOR_LINEAR_RANGE(1300000, 0x7a, 0x80, 0),
148 REGULATOR_LINEAR_RANGE(1310000, 0x81, 0x89, 10000),
149 REGULATOR_LINEAR_RANGE(1400000, 0x8a, 0x90, 0),
150 REGULATOR_LINEAR_RANGE(1410000, 0x91, 0x99, 10000),
151 REGULATOR_LINEAR_RANGE(1500000, 0x9a, 0xa0, 0),
152 REGULATOR_LINEAR_RANGE(1510000, 0xa1, 0xa9, 10000),
153 REGULATOR_LINEAR_RANGE(1600000, 0xaa, 0xb0, 0),
154 REGULATOR_LINEAR_RANGE(1610000, 0xb1, 0xb9, 10000),
155 REGULATOR_LINEAR_RANGE(1700000, 0xba, 0xc0, 0),
156 REGULATOR_LINEAR_RANGE(1710000, 0xc1, 0xc9, 10000),
157 REGULATOR_LINEAR_RANGE(1800000, 0xca, 0xd0, 0),
158 REGULATOR_LINEAR_RANGE(1810000, 0xd1, 0xd9, 10000),
159 REGULATOR_LINEAR_RANGE(1900000, 0xda, 0xe0, 0),
160 REGULATOR_LINEAR_RANGE(1910000, 0xe1, 0xe9, 10000),
161 REGULATOR_LINEAR_RANGE(2000000, 0xea, 0xf0, 0),
162 REGULATOR_LINEAR_RANGE(2010000, 0xf1, 0xf9, 10000),
163 REGULATOR_LINEAR_RANGE(2100000, 0xfa, 0xff, 0),
164};
165
166static const struct linear_range ldo_vout_ranges2[] = {
167 REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x09, 10000),
168 REGULATOR_LINEAR_RANGE(1300000, 0x0a, 0x10, 0),
169 REGULATOR_LINEAR_RANGE(1310000, 0x11, 0x19, 10000),
170 REGULATOR_LINEAR_RANGE(1400000, 0x1a, 0x1f, 0),
171 REGULATOR_LINEAR_RANGE(1500000, 0x20, 0x29, 10000),
172 REGULATOR_LINEAR_RANGE(1600000, 0x2a, 0x2f, 0),
173 REGULATOR_LINEAR_RANGE(1700000, 0x30, 0x39, 10000),
174 REGULATOR_LINEAR_RANGE(1800000, 0x3a, 0x40, 0),
175 REGULATOR_LINEAR_RANGE(1810000, 0x41, 0x49, 10000),
176 REGULATOR_LINEAR_RANGE(1900000, 0x4a, 0x4f, 0),
177 REGULATOR_LINEAR_RANGE(2000000, 0x50, 0x59, 10000),
178 REGULATOR_LINEAR_RANGE(2100000, 0x5a, 0x60, 0),
179 REGULATOR_LINEAR_RANGE(2110000, 0x61, 0x69, 10000),
180 REGULATOR_LINEAR_RANGE(2200000, 0x6a, 0x6f, 0),
181 REGULATOR_LINEAR_RANGE(2500000, 0x70, 0x79, 10000),
182 REGULATOR_LINEAR_RANGE(2600000, 0x7a, 0x7f, 0),
183 REGULATOR_LINEAR_RANGE(2700000, 0x80, 0x89, 10000),
184 REGULATOR_LINEAR_RANGE(2800000, 0x8a, 0x90, 0),
185 REGULATOR_LINEAR_RANGE(2810000, 0x91, 0x99, 10000),
186 REGULATOR_LINEAR_RANGE(2900000, 0x9a, 0xa0, 0),
187 REGULATOR_LINEAR_RANGE(2910000, 0xa1, 0xa9, 10000),
188 REGULATOR_LINEAR_RANGE(3000000, 0xaa, 0xb0, 0),
189 REGULATOR_LINEAR_RANGE(3010000, 0xb1, 0xb9, 10000),
190 REGULATOR_LINEAR_RANGE(3100000, 0xba, 0xc0, 0),
191 REGULATOR_LINEAR_RANGE(3110000, 0xc1, 0xc9, 10000),
192 REGULATOR_LINEAR_RANGE(3200000, 0xca, 0xcf, 0),
193 REGULATOR_LINEAR_RANGE(3300000, 0xd0, 0xd9, 10000),
194 REGULATOR_LINEAR_RANGE(3400000, 0xda, 0xe0, 0),
195 REGULATOR_LINEAR_RANGE(3410000, 0xe1, 0xe9, 10000),
196 REGULATOR_LINEAR_RANGE(3500000, 0xea, 0xf0, 0),
197 REGULATOR_LINEAR_RANGE(3510000, 0xf1, 0xf9, 10000),
198 REGULATOR_LINEAR_RANGE(3600000, 0xfa, 0xff, 0),
199};
200
201static const struct linear_range ldo_vout_ranges3[] = {
202 REGULATOR_LINEAR_RANGE(2700000, 0x00, 0x09, 10000),
203 REGULATOR_LINEAR_RANGE(2800000, 0x0a, 0x10, 0),
204 REGULATOR_LINEAR_RANGE(2810000, 0x11, 0x19, 10000),
205 REGULATOR_LINEAR_RANGE(2900000, 0x1a, 0x20, 0),
206 REGULATOR_LINEAR_RANGE(2910000, 0x21, 0x29, 10000),
207 REGULATOR_LINEAR_RANGE(3000000, 0x2a, 0x30, 0),
208 REGULATOR_LINEAR_RANGE(3010000, 0x31, 0x39, 10000),
209 REGULATOR_LINEAR_RANGE(3100000, 0x3a, 0x40, 0),
210 REGULATOR_LINEAR_RANGE(3110000, 0x41, 0x49, 10000),
211 REGULATOR_LINEAR_RANGE(3200000, 0x4a, 0x4f, 0),
212 REGULATOR_LINEAR_RANGE(3300000, 0x50, 0x59, 10000),
213 REGULATOR_LINEAR_RANGE(3400000, 0x5a, 0x60, 0),
214 REGULATOR_LINEAR_RANGE(3410000, 0x61, 0x69, 10000),
215 REGULATOR_LINEAR_RANGE(3500000, 0x6a, 0x70, 0),
216 REGULATOR_LINEAR_RANGE(3510000, 0x71, 0x79, 10000),
217 REGULATOR_LINEAR_RANGE(3600000, 0x7a, 0x7f, 0),
218};
219
220static int mt6360_regulator_set_mode(struct regulator_dev *rdev,
221 unsigned int mode)
222{
223 const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
224 struct regmap *regmap = rdev_get_regmap(rdev);
225 int shift = ffs(rdesc->mode_mask) - 1;
226 unsigned int val;
227 int ret;
228
229 switch (mode) {
230 case REGULATOR_MODE_NORMAL:
231 val = MT6360_OPMODE_NORMAL;
232 break;
233 case REGULATOR_MODE_STANDBY:
234 val = MT6360_OPMODE_ULP;
235 break;
236 case REGULATOR_MODE_IDLE:
237 val = MT6360_OPMODE_LP;
238 break;
239 default:
240 return -EINVAL;
241 }
242
243 ret = regmap_update_bits(regmap, rdesc->mode_reg, rdesc->mode_mask, val << shift);
244 if (ret) {
245 dev_err(&rdev->dev, "%s: fail (%d)\n", __func__, ret);
246 return ret;
247 }
248
249 return 0;
250}
251
252static unsigned int mt6360_regulator_get_mode(struct regulator_dev *rdev)
253{
254 const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
255 struct regmap *regmap = rdev_get_regmap(rdev);
256 int shift = ffs(rdesc->mode_mask) - 1;
257 unsigned int val;
258 int ret;
259
260 ret = regmap_read(regmap, rdesc->mode_reg, &val);
261 if (ret)
262 return ret;
263
264 val &= rdesc->mode_mask;
265 val >>= shift;
266
267 switch (val) {
268 case MT6360_OPMODE_LP:
269 return REGULATOR_MODE_IDLE;
270 case MT6360_OPMODE_ULP:
271 return REGULATOR_MODE_STANDBY;
272 case MT6360_OPMODE_NORMAL:
273 return REGULATOR_MODE_NORMAL;
274 default:
275 return -EINVAL;
276 }
277}
278
279static int mt6360_regulator_get_status(struct regulator_dev *rdev)
280{
281 const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
282 struct regmap *regmap = rdev_get_regmap(rdev);
283 unsigned int val;
284 int ret;
285
286 ret = regmap_read(regmap, rdesc->state_reg, &val);
287 if (ret)
288 return ret;
289
290 if (val & rdesc->state_mask)
291 return REGULATOR_STATUS_ON;
292
293 return REGULATOR_STATUS_OFF;
294}
295
296static const struct regulator_ops mt6360_regulator_ops = {
297 .list_voltage = regulator_list_voltage_linear_range,
298 .enable = regulator_enable_regmap,
299 .disable = regulator_disable_regmap,
300 .is_enabled = regulator_is_enabled_regmap,
301 .set_voltage_sel = regulator_set_voltage_sel_regmap,
302 .get_voltage_sel = regulator_get_voltage_sel_regmap,
303 .set_mode = mt6360_regulator_set_mode,
304 .get_mode = mt6360_regulator_get_mode,
305 .get_status = mt6360_regulator_get_status,
306};
307
308static unsigned int mt6360_regulator_of_map_mode(unsigned int hw_mode)
309{
310 switch (hw_mode) {
311 case MT6360_OPMODE_NORMAL:
312 return REGULATOR_MODE_NORMAL;
313 case MT6360_OPMODE_LP:
314 return REGULATOR_MODE_IDLE;
315 case MT6360_OPMODE_ULP:
316 return REGULATOR_MODE_STANDBY;
317 default:
318 return REGULATOR_MODE_INVALID;
319 }
320}
321
322#define MT6360_REGULATOR_DESC(_name, _sname, ereg, emask, vreg, vmask, \
323 mreg, mmask, streg, stmask, vranges, \
324 vcnts, offon_delay, irq_tbls) \
325{ \
326 .desc = { \
327 .name = #_name, \
328 .supply_name = #_sname, \
329 .id = MT6360_REGULATOR_##_name, \
330 .of_match = of_match_ptr(#_name), \
331 .regulators_node = of_match_ptr("regulator"), \
332 .of_map_mode = mt6360_regulator_of_map_mode, \
333 .owner = THIS_MODULE, \
334 .ops = &mt6360_regulator_ops, \
335 .type = REGULATOR_VOLTAGE, \
336 .vsel_reg = vreg, \
337 .vsel_mask = vmask, \
338 .enable_reg = ereg, \
339 .enable_mask = emask, \
340 .linear_ranges = vranges, \
341 .n_linear_ranges = ARRAY_SIZE(vranges), \
342 .n_voltages = vcnts, \
343 .off_on_delay = offon_delay, \
344 }, \
345 .mode_reg = mreg, \
346 .mode_mask = mmask, \
347 .state_reg = streg, \
348 .state_mask = stmask, \
349 .irq_tables = irq_tbls, \
350 .irq_table_size = ARRAY_SIZE(irq_tbls), \
351}
352
353static const struct mt6360_regulator_desc mt6360_regulator_descs[] = {
354 MT6360_REGULATOR_DESC(BUCK1, BUCK1_VIN, 0x117, 0x40, 0x110, 0xff, 0x117, 0x30, 0x117, 0x04,
355 buck_vout_ranges, 256, 0, buck1_irq_tbls),
356 MT6360_REGULATOR_DESC(BUCK2, BUCK2_VIN, 0x127, 0x40, 0x120, 0xff, 0x127, 0x30, 0x127, 0x04,
357 buck_vout_ranges, 256, 0, buck2_irq_tbls),
358 MT6360_REGULATOR_DESC(LDO6, LDO_VIN3, 0x137, 0x40, 0x13B, 0xff, 0x137, 0x30, 0x137, 0x04,
359 ldo_vout_ranges1, 256, 0, ldo6_irq_tbls),
360 MT6360_REGULATOR_DESC(LDO7, LDO_VIN3, 0x131, 0x40, 0x135, 0xff, 0x131, 0x30, 0x131, 0x04,
361 ldo_vout_ranges1, 256, 0, ldo7_irq_tbls),
362 MT6360_REGULATOR_DESC(LDO1, LDO_VIN1, 0x217, 0x40, 0x21B, 0xff, 0x217, 0x30, 0x217, 0x04,
363 ldo_vout_ranges2, 256, 0, ldo1_irq_tbls),
364 MT6360_REGULATOR_DESC(LDO2, LDO_VIN1, 0x211, 0x40, 0x215, 0xff, 0x211, 0x30, 0x211, 0x04,
365 ldo_vout_ranges2, 256, 0, ldo2_irq_tbls),
366 MT6360_REGULATOR_DESC(LDO3, LDO_VIN1, 0x205, 0x40, 0x209, 0xff, 0x205, 0x30, 0x205, 0x04,
367 ldo_vout_ranges2, 256, 100, ldo3_irq_tbls),
368 MT6360_REGULATOR_DESC(LDO5, LDO_VIN2, 0x20B, 0x40, 0x20F, 0x7f, 0x20B, 0x30, 0x20B, 0x04,
369 ldo_vout_ranges3, 128, 100, ldo5_irq_tbls),
370};
371
372static int mt6360_regulator_irq_register(struct platform_device *pdev,
373 struct regulator_dev *rdev,
374 const struct mt6360_irq_mapping *tbls,
375 int tbl_size)
376{
377 int i, irq, ret;
378
379 for (i = 0; i < tbl_size; i++) {
380 const struct mt6360_irq_mapping *irq_desc = tbls + i;
381
382 irq = platform_get_irq_byname(pdev, irq_desc->name);
383 if (irq < 0)
384 return irq;
385
386 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, irq_desc->handler, 0,
387 irq_desc->name, rdev);
388 if (ret) {
389 dev_err(&pdev->dev, "Fail to request %s irq\n", irq_desc->name);
390 return ret;
391 }
392 }
393
394 return 0;
395}
396
397static int mt6360_regulator_probe(struct platform_device *pdev)
398{
399 struct mt6360_regulator_data *mrd;
400 struct regulator_config config = {};
401 int i, ret;
402
403 mrd = devm_kzalloc(&pdev->dev, sizeof(*mrd), GFP_KERNEL);
404 if (!mrd)
405 return -ENOMEM;
406
407 mrd->dev = &pdev->dev;
408
409 mrd->regmap = dev_get_regmap(pdev->dev.parent, NULL);
410 if (!mrd->regmap) {
411 dev_err(&pdev->dev, "Failed to get parent regmap\n");
412 return -ENODEV;
413 }
414
415 config.dev = pdev->dev.parent;
416 config.driver_data = mrd;
417 config.regmap = mrd->regmap;
418
419 for (i = 0; i < ARRAY_SIZE(mt6360_regulator_descs); i++) {
420 const struct mt6360_regulator_desc *rdesc = mt6360_regulator_descs + i;
421 struct regulator_dev *rdev;
422
423 rdev = devm_regulator_register(&pdev->dev, &rdesc->desc, &config);
424 if (IS_ERR(rdev)) {
425 dev_err(&pdev->dev, "Failed to register %d regulator\n", i);
426 return PTR_ERR(rdev);
427 }
428
429 ret = mt6360_regulator_irq_register(pdev, rdev, rdesc->irq_tables,
430 rdesc->irq_table_size);
431 if (ret) {
432 dev_err(&pdev->dev, "Failed to register %d regulator irqs\n", i);
433 return ret;
434 }
435 }
436
437 return 0;
438}
439
440static const struct platform_device_id mt6360_regulator_id_table[] = {
441 { "mt6360-regulator", 0 },
442 {},
443};
444MODULE_DEVICE_TABLE(platform, mt6360_regulator_id_table);
445
446static struct platform_driver mt6360_regulator_driver = {
447 .driver = {
448 .name = "mt6360-regulator",
449 },
450 .probe = mt6360_regulator_probe,
451 .id_table = mt6360_regulator_id_table,
452};
453module_platform_driver(mt6360_regulator_driver);
454
455MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
456MODULE_DESCRIPTION("MT6360 Regulator Driver");
457MODULE_LICENSE("GPL v2");