aboutsummaryrefslogtreecommitdiff
path: root/drivers/regulator/bd9571mwv-regulator.c
blob: c67a83d53c4cb76bddf0ce04dbb840b6502c06de (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
/*
 * ROHM BD9571MWV-M regulator driver
 *
 * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.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 TPS65086 driver
 *
 * NOTE: VD09 is missing
 */

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

#include <linux/mfd/bd9571mwv.h>

enum bd9571mwv_regulators { VD09, VD18, VD25, VD33, DVFS };

#define BD9571MWV_REG(_name, _of, _id, _ops, _vr, _vm, _nv, _min, _step, _lmin)\
	{							\
		.name			= _name,		\
		.of_match		= of_match_ptr(_of),	\
		.regulators_node	= "regulators",		\
		.id			= _id,			\
		.ops			= &_ops,		\
		.n_voltages		= _nv,			\
		.type			= REGULATOR_VOLTAGE,	\
		.owner			= THIS_MODULE,		\
		.vsel_reg		= _vr,			\
		.vsel_mask		= _vm,			\
		.min_uV			= _min,			\
		.uV_step		= _step,		\
		.linear_min_sel		= _lmin,		\
	}

static int bd9571mwv_avs_get_moni_state(struct regulator_dev *rdev)
{
	unsigned int val;
	int ret;

	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val);
	if (ret != 0)
		return ret;

	return val & BD9571MWV_AVS_SET_MONI_MASK;
}

static int bd9571mwv_avs_set_voltage_sel_regmap(struct regulator_dev *rdev,
						unsigned int sel)
{
	int ret;

	ret = bd9571mwv_avs_get_moni_state(rdev);
	if (ret < 0)
		return ret;

	return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret),
				 rdev->desc->vsel_mask, sel);
}

static int bd9571mwv_avs_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
	unsigned int val;
	int ret;

	ret = bd9571mwv_avs_get_moni_state(rdev);
	if (ret < 0)
		return ret;

	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val);
	if (ret != 0)
		return ret;

	val &= rdev->desc->vsel_mask;
	val >>= ffs(rdev->desc->vsel_mask) - 1;

	return val;
}

static int bd9571mwv_reg_set_voltage_sel_regmap(struct regulator_dev *rdev,
						unsigned int sel)
{
	return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID,
				 rdev->desc->vsel_mask, sel);
}

/* Operations permitted on AVS voltage regulator */
static struct regulator_ops avs_ops = {
	.set_voltage_sel	= bd9571mwv_avs_set_voltage_sel_regmap,
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= bd9571mwv_avs_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

/* Operations permitted on voltage regulators */
static struct regulator_ops reg_ops = {
	.set_voltage_sel	= bd9571mwv_reg_set_voltage_sel_regmap,
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

/* Operations permitted on voltage monitors */
static struct regulator_ops vid_ops = {
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

static struct regulator_desc regulators[] = {
	BD9571MWV_REG("VD09", "vd09", VD09, avs_ops, 0, 0x7f,
		      0x80, 600000, 10000, 0x3c),
	BD9571MWV_REG("VD18", "vd18", VD18, vid_ops, BD9571MWV_VD18_VID, 0xf,
		      16, 1625000, 25000, 0),
	BD9571MWV_REG("VD25", "vd25", VD25, vid_ops, BD9571MWV_VD25_VID, 0xf,
		      16, 2150000, 50000, 0),
	BD9571MWV_REG("VD33", "vd33", VD33, vid_ops, BD9571MWV_VD33_VID, 0xf,
		      11, 2800000, 100000, 0),
	BD9571MWV_REG("DVFS", "dvfs", DVFS, reg_ops,
		      BD9571MWV_DVFS_MONIVDAC, 0x7f,
		      0x80, 600000, 10000, 0x3c),
};

static int bd9571mwv_regulator_probe(struct platform_device *pdev)
{
	struct bd9571mwv *bd = dev_get_drvdata(pdev->dev.parent);
	struct regulator_config config = { };
	struct regulator_dev *rdev;
	int i;

	platform_set_drvdata(pdev, bd);

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

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

	return 0;
}

static const struct platform_device_id bd9571mwv_regulator_id_table[] = {
	{ "bd9571mwv-regulator", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, bd9571mwv_regulator_id_table);

static struct platform_driver bd9571mwv_regulator_driver = {
	.driver = {
		.name = "bd9571mwv-regulator",
	},
	.probe = bd9571mwv_regulator_probe,
	.id_table = bd9571mwv_regulator_id_table,
};
module_platform_driver(bd9571mwv_regulator_driver);

MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
MODULE_DESCRIPTION("BD9571MWV Regulator driver");
MODULE_LICENSE("GPL v2");