summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/bcm590xx-regulator.c
blob: 76b01835dcb44f51e59b8f4986b6fb9874a9a6c3 (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
458
459
460
461
462
463
464
/*
 * Broadcom BCM590xx regulator driver
 *
 * Copyright 2014 Linaro Limited
 * Author: Matt Porter <mporter@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/bcm590xx.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>

/* I2C slave 0 registers */
#define BCM590XX_RFLDOPMCTRL1	0x60
#define BCM590XX_IOSR1PMCTRL1	0x7a
#define BCM590XX_IOSR2PMCTRL1	0x7c
#define BCM590XX_CSRPMCTRL1	0x7e
#define BCM590XX_SDSR1PMCTRL1	0x82
#define BCM590XX_SDSR2PMCTRL1	0x86
#define BCM590XX_MSRPMCTRL1	0x8a
#define BCM590XX_VSRPMCTRL1	0x8e
#define BCM590XX_RFLDOCTRL	0x96
#define BCM590XX_CSRVOUT1	0xc0

/* I2C slave 1 registers */
#define BCM590XX_GPLDO5PMCTRL1	0x16
#define BCM590XX_GPLDO6PMCTRL1	0x18
#define BCM590XX_GPLDO1CTRL	0x1a
#define BCM590XX_GPLDO2CTRL	0x1b
#define BCM590XX_GPLDO3CTRL	0x1c
#define BCM590XX_GPLDO4CTRL	0x1d
#define BCM590XX_GPLDO5CTRL	0x1e
#define BCM590XX_GPLDO6CTRL	0x1f
#define BCM590XX_OTG_CTRL	0x40
#define BCM590XX_GPLDO1PMCTRL1	0x57
#define BCM590XX_GPLDO2PMCTRL1	0x59
#define BCM590XX_GPLDO3PMCTRL1	0x5b
#define BCM590XX_GPLDO4PMCTRL1	0x5d

#define BCM590XX_REG_ENABLE	BIT(7)
#define BCM590XX_VBUS_ENABLE	BIT(2)
#define BCM590XX_LDO_VSEL_MASK	GENMASK(5, 3)
#define BCM590XX_SR_VSEL_MASK	GENMASK(5, 0)

/*
 * RFLDO to VSR regulators are
 * accessed via I2C slave 0
 */

/* LDO regulator IDs */
#define BCM590XX_REG_RFLDO	0
#define BCM590XX_REG_CAMLDO1	1
#define BCM590XX_REG_CAMLDO2	2
#define BCM590XX_REG_SIMLDO1	3
#define BCM590XX_REG_SIMLDO2	4
#define BCM590XX_REG_SDLDO	5
#define BCM590XX_REG_SDXLDO	6
#define BCM590XX_REG_MMCLDO1	7
#define BCM590XX_REG_MMCLDO2	8
#define BCM590XX_REG_AUDLDO	9
#define BCM590XX_REG_MICLDO	10
#define BCM590XX_REG_USBLDO	11
#define BCM590XX_REG_VIBLDO	12

/* DCDC regulator IDs */
#define BCM590XX_REG_CSR	13
#define BCM590XX_REG_IOSR1	14
#define BCM590XX_REG_IOSR2	15
#define BCM590XX_REG_MSR	16
#define BCM590XX_REG_SDSR1	17
#define BCM590XX_REG_SDSR2	18
#define BCM590XX_REG_VSR	19

/*
 * GPLDO1 to VBUS regulators are
 * accessed via I2C slave 1
 */

#define BCM590XX_REG_GPLDO1	20
#define BCM590XX_REG_GPLDO2	21
#define BCM590XX_REG_GPLDO3	22
#define BCM590XX_REG_GPLDO4	23
#define BCM590XX_REG_GPLDO5	24
#define BCM590XX_REG_GPLDO6	25
#define BCM590XX_REG_VBUS	26

#define BCM590XX_NUM_REGS	27

#define BCM590XX_REG_IS_LDO(n)	(n < BCM590XX_REG_CSR)
#define BCM590XX_REG_IS_GPLDO(n) \
	((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))
#define BCM590XX_REG_IS_VBUS(n)	(n == BCM590XX_REG_VBUS)

struct bcm590xx_board {
	struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
};

/* LDO group A: supported voltages in microvolts */
static const unsigned int ldo_a_table[] = {
	1200000, 1800000, 2500000, 2700000, 2800000,
	2900000, 3000000, 3300000,
};

/* LDO group C: supported voltages in microvolts */
static const unsigned int ldo_c_table[] = {
	3100000, 1800000, 2500000, 2700000, 2800000,
	2900000, 3000000, 3300000,
};

static const unsigned int ldo_vbus[] = {
	5000000,
};

/* DCDC group CSR: supported voltages in microvolts */
static const struct regulator_linear_range dcdc_csr_ranges[] = {
	REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
	REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
	REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
};

/* DCDC group IOSR1: supported voltages in microvolts */
static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
	REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
	REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
	REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
	REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
};

/* DCDC group SDSR1: supported voltages in microvolts */
static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
	REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
	REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
	REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
};

struct bcm590xx_info {
	const char *name;
	const char *vin_name;
	u8 n_voltages;
	const unsigned int *volt_table;
	u8 n_linear_ranges;
	const struct regulator_linear_range *linear_ranges;
};

#define BCM590XX_REG_TABLE(_name, _table) \
	{ \
		.name = #_name, \
		.n_voltages = ARRAY_SIZE(_table), \
		.volt_table = _table, \
	}

#define BCM590XX_REG_RANGES(_name, _ranges) \
	{ \
		.name = #_name, \
		.n_voltages = 64, \
		.n_linear_ranges = ARRAY_SIZE(_ranges), \
		.linear_ranges = _ranges, \
	}

static struct bcm590xx_info bcm590xx_regs[] = {
	BCM590XX_REG_TABLE(rfldo, ldo_a_table),
	BCM590XX_REG_TABLE(camldo1, ldo_c_table),
	BCM590XX_REG_TABLE(camldo2, ldo_c_table),
	BCM590XX_REG_TABLE(simldo1, ldo_a_table),
	BCM590XX_REG_TABLE(simldo2, ldo_a_table),
	BCM590XX_REG_TABLE(sdldo, ldo_c_table),
	BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
	BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
	BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
	BCM590XX_REG_TABLE(audldo, ldo_a_table),
	BCM590XX_REG_TABLE(micldo, ldo_a_table),
	BCM590XX_REG_TABLE(usbldo, ldo_a_table),
	BCM590XX_REG_TABLE(vibldo, ldo_c_table),
	BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
	BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
	BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
	BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
	BCM590XX_REG_TABLE(vbus, ldo_vbus),
};

struct bcm590xx_reg {
	struct regulator_desc *desc;
	struct bcm590xx *mfd;
};

static int bcm590xx_get_vsel_register(int id)
{
	if (BCM590XX_REG_IS_LDO(id))
		return BCM590XX_RFLDOCTRL + id;
	else if (BCM590XX_REG_IS_GPLDO(id))
		return BCM590XX_GPLDO1CTRL + id;
	else
		return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
}

static int bcm590xx_get_enable_register(int id)
{
	int reg = 0;

	if (BCM590XX_REG_IS_LDO(id))
		reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
	else if (BCM590XX_REG_IS_GPLDO(id))
		reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
	else
		switch (id) {
		case BCM590XX_REG_CSR:
			reg = BCM590XX_CSRPMCTRL1;
			break;
		case BCM590XX_REG_IOSR1:
			reg = BCM590XX_IOSR1PMCTRL1;
			break;
		case BCM590XX_REG_IOSR2:
			reg = BCM590XX_IOSR2PMCTRL1;
			break;
		case BCM590XX_REG_MSR:
			reg = BCM590XX_MSRPMCTRL1;
			break;
		case BCM590XX_REG_SDSR1:
			reg = BCM590XX_SDSR1PMCTRL1;
			break;
		case BCM590XX_REG_SDSR2:
			reg = BCM590XX_SDSR2PMCTRL1;
			break;
		case BCM590XX_REG_VBUS:
			reg = BCM590XX_OTG_CTRL;
		}


	return reg;
}

static struct regulator_ops bcm590xx_ops_ldo = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_table,
	.map_voltage		= regulator_map_voltage_iterate,
};

static struct regulator_ops bcm590xx_ops_dcdc = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
};

static struct regulator_ops bcm590xx_ops_vbus = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
};

#define BCM590XX_MATCH(_name, _id) \
	{ \
		.name = #_name, \
		.driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
	}

static struct of_regulator_match bcm590xx_matches[] = {
	BCM590XX_MATCH(rfldo, RFLDO),
	BCM590XX_MATCH(camldo1, CAMLDO1),
	BCM590XX_MATCH(camldo2, CAMLDO2),
	BCM590XX_MATCH(simldo1, SIMLDO1),
	BCM590XX_MATCH(simldo2, SIMLDO2),
	BCM590XX_MATCH(sdldo, SDLDO),
	BCM590XX_MATCH(sdxldo, SDXLDO),
	BCM590XX_MATCH(mmcldo1, MMCLDO1),
	BCM590XX_MATCH(mmcldo2, MMCLDO2),
	BCM590XX_MATCH(audldo, AUDLDO),
	BCM590XX_MATCH(micldo, MICLDO),
	BCM590XX_MATCH(usbldo, USBLDO),
	BCM590XX_MATCH(vibldo, VIBLDO),
	BCM590XX_MATCH(csr, CSR),
	BCM590XX_MATCH(iosr1, IOSR1),
	BCM590XX_MATCH(iosr2, IOSR2),
	BCM590XX_MATCH(msr, MSR),
	BCM590XX_MATCH(sdsr1, SDSR1),
	BCM590XX_MATCH(sdsr2, SDSR2),
	BCM590XX_MATCH(vsr, VSR),
	BCM590XX_MATCH(gpldo1, GPLDO1),
	BCM590XX_MATCH(gpldo2, GPLDO2),
	BCM590XX_MATCH(gpldo3, GPLDO3),
	BCM590XX_MATCH(gpldo4, GPLDO4),
	BCM590XX_MATCH(gpldo5, GPLDO5),
	BCM590XX_MATCH(gpldo6, GPLDO6),
	BCM590XX_MATCH(vbus, VBUS),
};

static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
		struct platform_device *pdev,
		struct of_regulator_match **bcm590xx_reg_matches)
{
	struct bcm590xx_board *data;
	struct device_node *np = pdev->dev.parent->of_node;
	struct device_node *regulators;
	struct of_regulator_match *matches = bcm590xx_matches;
	int count = ARRAY_SIZE(bcm590xx_matches);
	int idx = 0;
	int ret;

	if (!np) {
		dev_err(&pdev->dev, "of node not found\n");
		return NULL;
	}

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

	np = of_node_get(np);
	regulators = of_get_child_by_name(np, "regulators");
	if (!regulators) {
		dev_warn(&pdev->dev, "regulator node not found\n");
		return NULL;
	}

	ret = of_regulator_match(&pdev->dev, regulators, matches, count);
	of_node_put(regulators);
	if (ret < 0) {
		dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
			ret);
		return NULL;
	}

	*bcm590xx_reg_matches = matches;

	for (idx = 0; idx < count; idx++) {
		if (!matches[idx].init_data || !matches[idx].of_node)
			continue;

		data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
	}

	return data;
}

static int bcm590xx_probe(struct platform_device *pdev)
{
	struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
	struct bcm590xx_board *pmu_data = NULL;
	struct bcm590xx_reg *pmu;
	struct regulator_config config = { };
	struct bcm590xx_info *info;
	struct regulator_init_data *reg_data;
	struct regulator_dev *rdev;
	struct of_regulator_match *bcm590xx_reg_matches = NULL;
	int i;

	pmu_data = bcm590xx_parse_dt_reg_data(pdev,
					      &bcm590xx_reg_matches);

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

	pmu->mfd = bcm590xx;

	platform_set_drvdata(pdev, pmu);

	pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
			sizeof(struct regulator_desc), GFP_KERNEL);
	if (!pmu->desc)
		return -ENOMEM;

	info = bcm590xx_regs;

	for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
		if (pmu_data)
			reg_data = pmu_data->bcm590xx_pmu_init_data[i];
		else
			reg_data = NULL;

		/* Register the regulators */
		pmu->desc[i].name = info->name;
		pmu->desc[i].supply_name = info->vin_name;
		pmu->desc[i].id = i;
		pmu->desc[i].volt_table = info->volt_table;
		pmu->desc[i].n_voltages = info->n_voltages;
		pmu->desc[i].linear_ranges = info->linear_ranges;
		pmu->desc[i].n_linear_ranges = info->n_linear_ranges;

		if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
			pmu->desc[i].ops = &bcm590xx_ops_ldo;
			pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
		} else if (BCM590XX_REG_IS_VBUS(i))
			pmu->desc[i].ops = &bcm590xx_ops_vbus;
		else {
			pmu->desc[i].ops = &bcm590xx_ops_dcdc;
			pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
		}

		if (BCM590XX_REG_IS_VBUS(i))
			pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
		else {
			pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
			pmu->desc[i].enable_is_inverted = true;
			pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
		}
		pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
		pmu->desc[i].type = REGULATOR_VOLTAGE;
		pmu->desc[i].owner = THIS_MODULE;

		config.dev = bcm590xx->dev;
		config.init_data = reg_data;
		config.driver_data = pmu;
		if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
			config.regmap = bcm590xx->regmap_sec;
		else
			config.regmap = bcm590xx->regmap_pri;

		if (bcm590xx_reg_matches)
			config.of_node = bcm590xx_reg_matches[i].of_node;

		rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
					       &config);
		if (IS_ERR(rdev)) {
			dev_err(bcm590xx->dev,
				"failed to register %s regulator\n",
				pdev->name);
			return PTR_ERR(rdev);
		}
	}

	return 0;
}

static struct platform_driver bcm590xx_regulator_driver = {
	.driver = {
		.name = "bcm590xx-vregs",
	},
	.probe = bcm590xx_probe,
};
module_platform_driver(bcm590xx_regulator_driver);

MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:bcm590xx-vregs");