aboutsummaryrefslogtreecommitdiff
path: root/drivers/regulator/tps65086-regulator.c
blob: 5a5e9b5bf4bea7c6935cca2423dce30475c4177c (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
/*
 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
 *
 * Author: Andrew F. Davis <afd@ti.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether expressed or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License version 2 for more details.
 *
 * Based on the TPS65912 driver
 */

#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>

#include <linux/mfd/tps65086.h>

enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
	LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };

#define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm)	\
	[_id] = {							\
		.desc = {						\
			.name			= _name,		\
			.of_match		= of_match_ptr(_of),	\
			.regulators_node	= "regulators",		\
			.of_parse_cb		= tps65086_of_parse_cb,	\
			.id			= _id,			\
			.ops			= &reg_ops,		\
			.n_voltages		= _nv,			\
			.type			= REGULATOR_VOLTAGE,	\
			.owner			= THIS_MODULE,		\
			.vsel_reg		= _vr,			\
			.vsel_mask		= _vm,			\
			.enable_reg		= _er,			\
			.enable_mask		= _em,			\
			.volt_table		= NULL,			\
			.linear_ranges		= _lr,			\
			.n_linear_ranges	= ARRAY_SIZE(_lr),	\
		},							\
		.decay_reg = _dr,					\
		.decay_mask = _dm,					\
	}

#define TPS65086_SWITCH(_name, _of, _id, _er, _em)			\
	[_id] = {							\
		.desc = {						\
			.name			= _name,		\
			.of_match		= of_match_ptr(_of),	\
			.regulators_node	= "regulators",		\
			.of_parse_cb		= tps65086_of_parse_cb,	\
			.id			= _id,			\
			.ops			= &switch_ops,		\
			.type			= REGULATOR_VOLTAGE,	\
			.owner			= THIS_MODULE,		\
			.enable_reg		= _er,			\
			.enable_mask		= _em,			\
		},							\
	}

struct tps65086_regulator {
	struct regulator_desc desc;
	unsigned int decay_reg;
	unsigned int decay_mask;
};

static const struct regulator_linear_range tps65086_10mv_ranges[] = {
	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
	REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
};

static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = {
	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
	REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
	REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
};

static const struct regulator_linear_range tps65086_buck345_25mv_ranges[] = {
	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
	REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
};

static const struct regulator_linear_range tps65086_ldoa1_ranges[] = {
	REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
	REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
	REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
	REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
	REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
};

static const struct regulator_linear_range tps65086_ldoa23_ranges[] = {
	REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
	REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
};

/* Operations permitted on regulators */
static struct regulator_ops reg_ops = {
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.map_voltage		= regulator_map_voltage_linear_range,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear_range,
};

/* Operations permitted on load switches */
static struct regulator_ops switch_ops = {
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
};

static int tps65086_of_parse_cb(struct device_node *dev,
				const struct regulator_desc *desc,
				struct regulator_config *config);

static struct tps65086_regulator regulators[] = {
	TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
			   tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
			   BIT(0)),
	TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
			   tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
			   BIT(0)),
	TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
			   tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
			   BIT(0)),
	TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
			   BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
			   tps65086_10mv_ranges, TPS65086_BUCK4VID,
			   BIT(0)),
	TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
			   BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
			   tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
			   BIT(0)),
	TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
			   BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
			   tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
			   BIT(0)),
	TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
			   VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
			   tps65086_ldoa1_ranges, 0, 0),
	TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
			   VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
			   tps65086_ldoa23_ranges, 0, 0),
	TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
			   VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
			   tps65086_ldoa23_ranges, 0, 0),
	TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
	TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
	TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
	TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
};

static int tps65086_of_parse_cb(struct device_node *node,
				const struct regulator_desc *desc,
				struct regulator_config *config)
{
	int ret;

	/* Check for 25mV step mode */
	if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
		switch (desc->id) {
		case BUCK1:
		case BUCK2:
		case BUCK6:
			regulators[desc->id].desc.linear_ranges =
				tps65086_buck126_25mv_ranges;
			regulators[desc->id].desc.n_linear_ranges =
				ARRAY_SIZE(tps65086_buck126_25mv_ranges);
			break;
		case BUCK3:
		case BUCK4:
		case BUCK5:
			regulators[desc->id].desc.linear_ranges =
				tps65086_buck345_25mv_ranges;
			regulators[desc->id].desc.n_linear_ranges =
				ARRAY_SIZE(tps65086_buck345_25mv_ranges);
			break;
		default:
			dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
		}
	}

	/* Check for decay mode */
	if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
		ret = regmap_write_bits(config->regmap,
					regulators[desc->id].decay_reg,
					regulators[desc->id].decay_mask,
					regulators[desc->id].decay_mask);
		if (ret) {
			dev_err(config->dev, "Error setting decay\n");
			return ret;
		}
	}

	return 0;
}

static int tps65086_regulator_probe(struct platform_device *pdev)
{
	struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
	struct regulator_config config = { };
	struct regulator_dev *rdev;
	int i;

	platform_set_drvdata(pdev, tps);

	config.dev = &pdev->dev;
	config.dev->of_node = tps->dev->of_node;
	config.driver_data = tps;
	config.regmap = tps->regmap;

	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
		rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
					       &config);
		if (IS_ERR(rdev)) {
			dev_err(tps->dev, "failed to register %s regulator\n",
				pdev->name);
			return PTR_ERR(rdev);
		}
	}

	return 0;
}

static const struct platform_device_id tps65086_regulator_id_table[] = {
	{ "tps65086-regulator", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);

static struct platform_driver tps65086_regulator_driver = {
	.driver = {
		.name = "tps65086-regulator",
	},
	.probe = tps65086_regulator_probe,
	.id_table = tps65086_regulator_id_table,
};
module_platform_driver(tps65086_regulator_driver);

MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
MODULE_DESCRIPTION("TPS65086 Regulator driver");
MODULE_LICENSE("GPL v2");