aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mfd/da9063-i2c.c
blob: 8db5c805c64f272e661d74fe90bbc3a1c4c46520 (plain) (blame)
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
/* da9063-i2c.c: Interrupt support for Dialog DA9063
 *
 * Copyright 2012 Dialog Semiconductor Ltd.
 * Copyright 2013 Philipp Zabel, Pengutronix
 *
 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
 *
 *  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/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/err.h>

#include <linux/mfd/core.h>
#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/pdata.h>
#include <linux/mfd/da9063/registers.h>

static const struct regmap_range da9063_readable_ranges[] = {
	{
		.range_min = DA9063_REG_PAGE_CON,
		.range_max = DA9063_REG_SECOND_D,
	}, {
		.range_min = DA9063_REG_SEQ,
		.range_max = DA9063_REG_ID_32_31,
	}, {
		.range_min = DA9063_REG_SEQ_A,
		.range_max = DA9063_REG_AUTO3_LOW,
	}, {
		.range_min = DA9063_REG_T_OFFSET,
		.range_max = DA9063_REG_GP_ID_19,
	}, {
		.range_min = DA9063_REG_CHIP_ID,
		.range_max = DA9063_REG_CHIP_VARIANT,
	},
};

static const struct regmap_range da9063_writeable_ranges[] = {
	{
		.range_min = DA9063_REG_PAGE_CON,
		.range_max = DA9063_REG_PAGE_CON,
	}, {
		.range_min = DA9063_REG_FAULT_LOG,
		.range_max = DA9063_REG_VSYS_MON,
	}, {
		.range_min = DA9063_REG_COUNT_S,
		.range_max = DA9063_REG_ALARM_Y,
	}, {
		.range_min = DA9063_REG_SEQ,
		.range_max = DA9063_REG_ID_32_31,
	}, {
		.range_min = DA9063_REG_SEQ_A,
		.range_max = DA9063_REG_AUTO3_LOW,
	}, {
		.range_min = DA9063_REG_CONFIG_I,
		.range_max = DA9063_REG_MON_REG_4,
	}, {
		.range_min = DA9063_REG_GP_ID_0,
		.range_max = DA9063_REG_GP_ID_19,
	},
};

static const struct regmap_range da9063_volatile_ranges[] = {
	{
		.range_min = DA9063_REG_STATUS_A,
		.range_max = DA9063_REG_EVENT_D,
	}, {
		.range_min = DA9063_REG_CONTROL_F,
		.range_max = DA9063_REG_CONTROL_F,
	}, {
		.range_min = DA9063_REG_ADC_MAN,
		.range_max = DA9063_REG_ADC_MAN,
	}, {
		.range_min = DA9063_REG_ADC_RES_L,
		.range_max = DA9063_REG_SECOND_D,
	}, {
		.range_min = DA9063_REG_MON_REG_5,
		.range_max = DA9063_REG_MON_REG_6,
	},
};

static const struct regmap_access_table da9063_readable_table = {
	.yes_ranges = da9063_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_readable_ranges),
};

static const struct regmap_access_table da9063_writeable_table = {
	.yes_ranges = da9063_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_writeable_ranges),
};

static const struct regmap_access_table da9063_volatile_table = {
	.yes_ranges = da9063_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(da9063_volatile_ranges),
};

static const struct regmap_range_cfg da9063_range_cfg[] = {
	{
		.range_min = DA9063_REG_PAGE_CON,
		.range_max = DA9063_REG_CHIP_VARIANT,
		.selector_reg = DA9063_REG_PAGE_CON,
		.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
		.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
		.window_start = 0,
		.window_len = 256,
	}
};

static struct regmap_config da9063_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.ranges = da9063_range_cfg,
	.num_ranges = ARRAY_SIZE(da9063_range_cfg),
	.max_register = DA9063_REG_CHIP_VARIANT,

	.cache_type = REGCACHE_RBTREE,

	.rd_table = &da9063_readable_table,
	.wr_table = &da9063_writeable_table,
	.volatile_table = &da9063_volatile_table,
};

static int da9063_i2c_probe(struct i2c_client *i2c,
	const struct i2c_device_id *id)
{
	struct da9063 *da9063;
	int ret;

	da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
	if (da9063 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, da9063);
	da9063->dev = &i2c->dev;
	da9063->chip_irq = i2c->irq;

	da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
	if (IS_ERR(da9063->regmap)) {
		ret = PTR_ERR(da9063->regmap);
		dev_err(da9063->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	return da9063_device_init(da9063, i2c->irq);
}

static int da9063_i2c_remove(struct i2c_client *i2c)
{
	struct da9063 *da9063 = i2c_get_clientdata(i2c);

	da9063_device_exit(da9063);

	return 0;
}

static const struct i2c_device_id da9063_i2c_id[] = {
	{"da9063", PMIC_DA9063},
	{},
};
MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);

static struct i2c_driver da9063_i2c_driver = {
	.driver = {
		.name = "da9063",
		.owner = THIS_MODULE,
	},
	.probe    = da9063_i2c_probe,
	.remove   = da9063_i2c_remove,
	.id_table = da9063_i2c_id,
};

module_i2c_driver(da9063_i2c_driver);