aboutsummaryrefslogtreecommitdiff
path: root/drivers/regulator/mt6360-regulator.c
blob: 4d34be94d166359341a581ba60a1a1693dbf4940 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright (C) 2020 MediaTek Inc.
//
// Author: Gene Chen <gene_chen@richtek.com>

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>

#include <dt-bindings/regulator/mediatek,mt6360-regulator.h>

enum {
	MT6360_REGULATOR_BUCK1 = 0,
	MT6360_REGULATOR_BUCK2,
	MT6360_REGULATOR_LDO6,
	MT6360_REGULATOR_LDO7,
	MT6360_REGULATOR_LDO1,
	MT6360_REGULATOR_LDO2,
	MT6360_REGULATOR_LDO3,
	MT6360_REGULATOR_LDO5,
	MT6360_REGULATOR_MAX,
};

struct mt6360_irq_mapping {
	const char *name;
	irq_handler_t handler;
};

struct mt6360_regulator_desc {
	const struct regulator_desc desc;
	unsigned int mode_reg;
	unsigned int mode_mask;
	unsigned int state_reg;
	unsigned int state_mask;
	const struct mt6360_irq_mapping *irq_tables;
	int irq_table_size;
};

struct mt6360_regulator_data {
	struct device *dev;
	struct regmap *regmap;
};

static irqreturn_t mt6360_pgb_event_handler(int irq, void *data)
{
	struct regulator_dev *rdev = data;

	regulator_notifier_call_chain(rdev, REGULATOR_EVENT_FAIL, NULL);
	return IRQ_HANDLED;
}

static irqreturn_t mt6360_oc_event_handler(int irq, void *data)
{
	struct regulator_dev *rdev = data;

	regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_CURRENT, NULL);
	return IRQ_HANDLED;
}

static irqreturn_t mt6360_ov_event_handler(int irq, void *data)
{
	struct regulator_dev *rdev = data;

	regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL);
	return IRQ_HANDLED;
}

static irqreturn_t mt6360_uv_event_handler(int irq, void *data)
{
	struct regulator_dev *rdev = data;

	regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL);
	return IRQ_HANDLED;
}

static const struct mt6360_irq_mapping buck1_irq_tbls[] = {
	{ "buck1_pgb_evt", mt6360_pgb_event_handler },
	{ "buck1_oc_evt", mt6360_oc_event_handler },
	{ "buck1_ov_evt", mt6360_ov_event_handler },
	{ "buck1_uv_evt", mt6360_uv_event_handler },
};

static const struct mt6360_irq_mapping buck2_irq_tbls[] = {
	{ "buck2_pgb_evt", mt6360_pgb_event_handler },
	{ "buck2_oc_evt", mt6360_oc_event_handler },
	{ "buck2_ov_evt", mt6360_ov_event_handler },
	{ "buck2_uv_evt", mt6360_uv_event_handler },
};

static const struct mt6360_irq_mapping ldo6_irq_tbls[] = {
	{ "ldo6_pgb_evt", mt6360_pgb_event_handler },
	{ "ldo6_oc_evt", mt6360_oc_event_handler },
};

static const struct mt6360_irq_mapping ldo7_irq_tbls[] = {
	{ "ldo7_pgb_evt", mt6360_pgb_event_handler },
	{ "ldo7_oc_evt", mt6360_oc_event_handler },
};

static const struct mt6360_irq_mapping ldo1_irq_tbls[] = {
	{ "ldo1_pgb_evt", mt6360_pgb_event_handler },
	{ "ldo1_oc_evt", mt6360_oc_event_handler },
};

static const struct mt6360_irq_mapping ldo2_irq_tbls[] = {
	{ "ldo2_pgb_evt", mt6360_pgb_event_handler },
	{ "ldo2_oc_evt", mt6360_oc_event_handler },
};

static const struct mt6360_irq_mapping ldo3_irq_tbls[] = {
	{ "ldo3_pgb_evt", mt6360_pgb_event_handler },
	{ "ldo3_oc_evt", mt6360_oc_event_handler },
};

static const struct mt6360_irq_mapping ldo5_irq_tbls[] = {
	{ "ldo5_pgb_evt", mt6360_pgb_event_handler },
	{ "ldo5_oc_evt", mt6360_oc_event_handler },
};

static const struct linear_range buck_vout_ranges[] = {
	REGULATOR_LINEAR_RANGE(300000, 0x00, 0xc7, 5000),
	REGULATOR_LINEAR_RANGE(1300000, 0xc8, 0xff, 0),
};

static const struct linear_range ldo_vout_ranges1[] = {
	REGULATOR_LINEAR_RANGE(500000, 0x00, 0x09, 10000),
	REGULATOR_LINEAR_RANGE(600000, 0x0a, 0x10, 0),
	REGULATOR_LINEAR_RANGE(610000, 0x11, 0x19, 10000),
	REGULATOR_LINEAR_RANGE(700000, 0x1a, 0x20, 0),
	REGULATOR_LINEAR_RANGE(710000, 0x21, 0x29, 10000),
	REGULATOR_LINEAR_RANGE(800000, 0x2a, 0x30, 0),
	REGULATOR_LINEAR_RANGE(810000, 0x31, 0x39, 10000),
	REGULATOR_LINEAR_RANGE(900000, 0x3a, 0x40, 0),
	REGULATOR_LINEAR_RANGE(910000, 0x41, 0x49, 10000),
	REGULATOR_LINEAR_RANGE(1000000, 0x4a, 0x50, 0),
	REGULATOR_LINEAR_RANGE(1010000, 0x51, 0x59, 10000),
	REGULATOR_LINEAR_RANGE(1100000, 0x5a, 0x60, 0),
	REGULATOR_LINEAR_RANGE(1110000, 0x61, 0x69, 10000),
	REGULATOR_LINEAR_RANGE(1200000, 0x6a, 0x70, 0),
	REGULATOR_LINEAR_RANGE(1210000, 0x71, 0x79, 10000),
	REGULATOR_LINEAR_RANGE(1300000, 0x7a, 0x80, 0),
	REGULATOR_LINEAR_RANGE(1310000, 0x81, 0x89, 10000),
	REGULATOR_LINEAR_RANGE(1400000, 0x8a, 0x90, 0),
	REGULATOR_LINEAR_RANGE(1410000, 0x91, 0x99, 10000),
	REGULATOR_LINEAR_RANGE(1500000, 0x9a, 0xa0, 0),
	REGULATOR_LINEAR_RANGE(1510000, 0xa1, 0xa9, 10000),
	REGULATOR_LINEAR_RANGE(1600000, 0xaa, 0xb0, 0),
	REGULATOR_LINEAR_RANGE(1610000, 0xb1, 0xb9, 10000),
	REGULATOR_LINEAR_RANGE(1700000, 0xba, 0xc0, 0),
	REGULATOR_LINEAR_RANGE(1710000, 0xc1, 0xc9, 10000),
	REGULATOR_LINEAR_RANGE(1800000, 0xca, 0xd0, 0),
	REGULATOR_LINEAR_RANGE(1810000, 0xd1, 0xd9, 10000),
	REGULATOR_LINEAR_RANGE(1900000, 0xda, 0xe0, 0),
	REGULATOR_LINEAR_RANGE(1910000, 0xe1, 0xe9, 10000),
	REGULATOR_LINEAR_RANGE(2000000, 0xea, 0xf0, 0),
	REGULATOR_LINEAR_RANGE(2010000, 0xf1, 0xf9, 10000),
	REGULATOR_LINEAR_RANGE(2100000, 0xfa, 0xff, 0),
};

static const struct linear_range ldo_vout_ranges2[] = {
	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x09, 10000),
	REGULATOR_LINEAR_RANGE(1300000, 0x0a, 0x10, 0),
	REGULATOR_LINEAR_RANGE(1310000, 0x11, 0x19, 10000),
	REGULATOR_LINEAR_RANGE(1400000, 0x1a, 0x1f, 0),
	REGULATOR_LINEAR_RANGE(1500000, 0x20, 0x29, 10000),
	REGULATOR_LINEAR_RANGE(1600000, 0x2a, 0x2f, 0),
	REGULATOR_LINEAR_RANGE(1700000, 0x30, 0x39, 10000),
	REGULATOR_LINEAR_RANGE(1800000, 0x3a, 0x40, 0),
	REGULATOR_LINEAR_RANGE(1810000, 0x41, 0x49, 10000),
	REGULATOR_LINEAR_RANGE(1900000, 0x4a, 0x4f, 0),
	REGULATOR_LINEAR_RANGE(2000000, 0x50, 0x59, 10000),
	REGULATOR_LINEAR_RANGE(2100000, 0x5a, 0x60, 0),
	REGULATOR_LINEAR_RANGE(2110000, 0x61, 0x69, 10000),
	REGULATOR_LINEAR_RANGE(2200000, 0x6a, 0x6f, 0),
	REGULATOR_LINEAR_RANGE(2500000, 0x70, 0x79, 10000),
	REGULATOR_LINEAR_RANGE(2600000, 0x7a, 0x7f, 0),
	REGULATOR_LINEAR_RANGE(2700000, 0x80, 0x89, 10000),
	REGULATOR_LINEAR_RANGE(2800000, 0x8a, 0x90, 0),
	REGULATOR_LINEAR_RANGE(2810000, 0x91, 0x99, 10000),
	REGULATOR_LINEAR_RANGE(2900000, 0x9a, 0xa0, 0),
	REGULATOR_LINEAR_RANGE(2910000, 0xa1, 0xa9, 10000),
	REGULATOR_LINEAR_RANGE(3000000, 0xaa, 0xb0, 0),
	REGULATOR_LINEAR_RANGE(3010000, 0xb1, 0xb9, 10000),
	REGULATOR_LINEAR_RANGE(3100000, 0xba, 0xc0, 0),
	REGULATOR_LINEAR_RANGE(3110000, 0xc1, 0xc9, 10000),
	REGULATOR_LINEAR_RANGE(3200000, 0xca, 0xcf, 0),
	REGULATOR_LINEAR_RANGE(3300000, 0xd0, 0xd9, 10000),
	REGULATOR_LINEAR_RANGE(3400000, 0xda, 0xe0, 0),
	REGULATOR_LINEAR_RANGE(3410000, 0xe1, 0xe9, 10000),
	REGULATOR_LINEAR_RANGE(3500000, 0xea, 0xf0, 0),
	REGULATOR_LINEAR_RANGE(3510000, 0xf1, 0xf9, 10000),
	REGULATOR_LINEAR_RANGE(3600000, 0xfa, 0xff, 0),
};

static const struct linear_range ldo_vout_ranges3[] = {
	REGULATOR_LINEAR_RANGE(2700000, 0x00, 0x09, 10000),
	REGULATOR_LINEAR_RANGE(2800000, 0x0a, 0x10, 0),
	REGULATOR_LINEAR_RANGE(2810000, 0x11, 0x19, 10000),
	REGULATOR_LINEAR_RANGE(2900000, 0x1a, 0x20, 0),
	REGULATOR_LINEAR_RANGE(2910000, 0x21, 0x29, 10000),
	REGULATOR_LINEAR_RANGE(3000000, 0x2a, 0x30, 0),
	REGULATOR_LINEAR_RANGE(3010000, 0x31, 0x39, 10000),
	REGULATOR_LINEAR_RANGE(3100000, 0x3a, 0x40, 0),
	REGULATOR_LINEAR_RANGE(3110000, 0x41, 0x49, 10000),
	REGULATOR_LINEAR_RANGE(3200000, 0x4a, 0x4f, 0),
	REGULATOR_LINEAR_RANGE(3300000, 0x50, 0x59, 10000),
	REGULATOR_LINEAR_RANGE(3400000, 0x5a, 0x60, 0),
	REGULATOR_LINEAR_RANGE(3410000, 0x61, 0x69, 10000),
	REGULATOR_LINEAR_RANGE(3500000, 0x6a, 0x70, 0),
	REGULATOR_LINEAR_RANGE(3510000, 0x71, 0x79, 10000),
	REGULATOR_LINEAR_RANGE(3600000, 0x7a, 0x7f, 0),
};

static int mt6360_regulator_set_mode(struct regulator_dev *rdev,
				     unsigned int mode)
{
	const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
	struct regmap *regmap = rdev_get_regmap(rdev);
	int shift = ffs(rdesc->mode_mask) - 1;
	unsigned int val;
	int ret;

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		val = MT6360_OPMODE_NORMAL;
		break;
	case REGULATOR_MODE_STANDBY:
		val = MT6360_OPMODE_ULP;
		break;
	case REGULATOR_MODE_IDLE:
		val = MT6360_OPMODE_LP;
		break;
	default:
		return -EINVAL;
	}

	ret = regmap_update_bits(regmap, rdesc->mode_reg, rdesc->mode_mask, val << shift);
	if (ret) {
		dev_err(&rdev->dev, "%s: fail (%d)\n", __func__, ret);
		return ret;
	}

	return 0;
}

static unsigned int mt6360_regulator_get_mode(struct regulator_dev *rdev)
{
	const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
	struct regmap *regmap = rdev_get_regmap(rdev);
	int shift = ffs(rdesc->mode_mask) - 1;
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, rdesc->mode_reg, &val);
	if (ret)
		return ret;

	val &= rdesc->mode_mask;
	val >>= shift;

	switch (val) {
	case MT6360_OPMODE_LP:
		return REGULATOR_MODE_IDLE;
	case MT6360_OPMODE_ULP:
		return REGULATOR_MODE_STANDBY;
	case MT6360_OPMODE_NORMAL:
		return REGULATOR_MODE_NORMAL;
	default:
		return -EINVAL;
	}
}

static int mt6360_regulator_get_status(struct regulator_dev *rdev)
{
	const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc;
	struct regmap *regmap = rdev_get_regmap(rdev);
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, rdesc->state_reg, &val);
	if (ret)
		return ret;

	if (val & rdesc->state_mask)
		return REGULATOR_STATUS_ON;

	return REGULATOR_STATUS_OFF;
}

static const struct regulator_ops mt6360_regulator_ops = {
	.list_voltage = regulator_list_voltage_linear_range,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_mode = mt6360_regulator_set_mode,
	.get_mode = mt6360_regulator_get_mode,
	.get_status = mt6360_regulator_get_status,
};

static unsigned int mt6360_regulator_of_map_mode(unsigned int hw_mode)
{
	switch (hw_mode) {
	case MT6360_OPMODE_NORMAL:
		return REGULATOR_MODE_NORMAL;
	case MT6360_OPMODE_LP:
		return REGULATOR_MODE_IDLE;
	case MT6360_OPMODE_ULP:
		return REGULATOR_MODE_STANDBY;
	default:
		return REGULATOR_MODE_INVALID;
	}
}

#define MT6360_REGULATOR_DESC(_name, _sname, ereg, emask, vreg,	vmask,	\
			      mreg, mmask, streg, stmask, vranges,	\
			      vcnts, offon_delay, irq_tbls)		\
{									\
	.desc = {							\
		.name = #_name,						\
		.supply_name = #_sname,					\
		.id =  MT6360_REGULATOR_##_name,			\
		.of_match = of_match_ptr(#_name),			\
		.regulators_node = of_match_ptr("regulator"),		\
		.of_map_mode = mt6360_regulator_of_map_mode,		\
		.owner = THIS_MODULE,					\
		.ops = &mt6360_regulator_ops,				\
		.type = REGULATOR_VOLTAGE,				\
		.vsel_reg = vreg,					\
		.vsel_mask = vmask,					\
		.enable_reg = ereg,					\
		.enable_mask = emask,					\
		.linear_ranges = vranges,				\
		.n_linear_ranges = ARRAY_SIZE(vranges),			\
		.n_voltages = vcnts,					\
		.off_on_delay = offon_delay,				\
	},								\
	.mode_reg = mreg,						\
	.mode_mask = mmask,						\
	.state_reg = streg,						\
	.state_mask = stmask,						\
	.irq_tables = irq_tbls,						\
	.irq_table_size = ARRAY_SIZE(irq_tbls),				\
}

static const struct mt6360_regulator_desc mt6360_regulator_descs[] =  {
	MT6360_REGULATOR_DESC(BUCK1, BUCK1_VIN, 0x117, 0x40, 0x110, 0xff, 0x117, 0x30, 0x117, 0x04,
			      buck_vout_ranges, 256, 0, buck1_irq_tbls),
	MT6360_REGULATOR_DESC(BUCK2, BUCK2_VIN, 0x127, 0x40, 0x120, 0xff, 0x127, 0x30, 0x127, 0x04,
			      buck_vout_ranges, 256, 0, buck2_irq_tbls),
	MT6360_REGULATOR_DESC(LDO6, LDO_VIN3, 0x137, 0x40, 0x13B, 0xff, 0x137, 0x30, 0x137, 0x04,
			      ldo_vout_ranges1, 256, 0, ldo6_irq_tbls),
	MT6360_REGULATOR_DESC(LDO7, LDO_VIN3, 0x131, 0x40, 0x135, 0xff, 0x131, 0x30, 0x131, 0x04,
			      ldo_vout_ranges1, 256, 0, ldo7_irq_tbls),
	MT6360_REGULATOR_DESC(LDO1, LDO_VIN1, 0x217, 0x40, 0x21B, 0xff, 0x217, 0x30, 0x217, 0x04,
			      ldo_vout_ranges2, 256, 0, ldo1_irq_tbls),
	MT6360_REGULATOR_DESC(LDO2, LDO_VIN1, 0x211, 0x40, 0x215, 0xff, 0x211, 0x30, 0x211, 0x04,
			      ldo_vout_ranges2, 256, 0, ldo2_irq_tbls),
	MT6360_REGULATOR_DESC(LDO3, LDO_VIN1, 0x205, 0x40, 0x209, 0xff, 0x205, 0x30, 0x205, 0x04,
			      ldo_vout_ranges2, 256, 100, ldo3_irq_tbls),
	MT6360_REGULATOR_DESC(LDO5, LDO_VIN2, 0x20B, 0x40, 0x20F, 0x7f, 0x20B, 0x30, 0x20B, 0x04,
			      ldo_vout_ranges3, 128, 100, ldo5_irq_tbls),
};

static int mt6360_regulator_irq_register(struct platform_device *pdev,
					 struct regulator_dev *rdev,
					 const struct mt6360_irq_mapping *tbls,
					 int tbl_size)
{
	int i, irq, ret;

	for (i = 0; i < tbl_size; i++) {
		const struct mt6360_irq_mapping *irq_desc = tbls + i;

		irq = platform_get_irq_byname(pdev, irq_desc->name);
		if (irq < 0)
			return irq;

		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, irq_desc->handler, 0,
						irq_desc->name, rdev);
		if (ret) {
			dev_err(&pdev->dev, "Fail to request %s irq\n", irq_desc->name);
			return ret;
		}
	}

	return 0;
}

static int mt6360_regulator_probe(struct platform_device *pdev)
{
	struct mt6360_regulator_data *mrd;
	struct regulator_config config = {};
	int i, ret;

	mrd = devm_kzalloc(&pdev->dev, sizeof(*mrd), GFP_KERNEL);
	if (!mrd)
		return -ENOMEM;

	mrd->dev = &pdev->dev;

	mrd->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!mrd->regmap) {
		dev_err(&pdev->dev, "Failed to get parent regmap\n");
		return -ENODEV;
	}

	config.dev = pdev->dev.parent;
	config.driver_data = mrd;
	config.regmap = mrd->regmap;

	for (i = 0; i < ARRAY_SIZE(mt6360_regulator_descs); i++) {
		const struct mt6360_regulator_desc *rdesc = mt6360_regulator_descs + i;
		struct regulator_dev *rdev;

		rdev = devm_regulator_register(&pdev->dev, &rdesc->desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev, "Failed to register  %d regulator\n", i);
			return PTR_ERR(rdev);
		}

		ret = mt6360_regulator_irq_register(pdev, rdev, rdesc->irq_tables,
						    rdesc->irq_table_size);
		if (ret) {
			dev_err(&pdev->dev, "Failed to register  %d regulator irqs\n", i);
			return ret;
		}
	}

	return 0;
}

static const struct platform_device_id mt6360_regulator_id_table[] = {
	{ "mt6360-regulator", 0 },
	{},
};
MODULE_DEVICE_TABLE(platform, mt6360_regulator_id_table);

static struct platform_driver mt6360_regulator_driver = {
	.driver = {
		.name = "mt6360-regulator",
	},
	.probe = mt6360_regulator_probe,
	.id_table = mt6360_regulator_id_table,
};
module_platform_driver(mt6360_regulator_driver);

MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
MODULE_DESCRIPTION("MT6360 Regulator Driver");
MODULE_LICENSE("GPL v2");