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
|
/*
* MFD core driver for Ricoh RN5T618 PMIC
*
* Copyright (C) 2014 Beniamino Galvani <b.galvani@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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rn5t618.h>
#include <linux/module.h>
#include <linux/regmap.h>
static const struct mfd_cell rn5t618_cells[] = {
{ .name = "rn5t618-regulator" },
{ .name = "rn5t618-wdt" },
};
static bool rn5t618_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case RN5T618_WATCHDOGCNT:
case RN5T618_DCIRQ:
case RN5T618_ILIMDATAH ... RN5T618_AIN0DATAL:
case RN5T618_IR_ADC1 ... RN5T618_IR_ADC3:
case RN5T618_IR_GPR:
case RN5T618_IR_GPF:
case RN5T618_MON_IOIN:
case RN5T618_INTMON:
return true;
default:
return false;
}
}
static const struct regmap_config rn5t618_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_reg = rn5t618_volatile_reg,
.max_register = RN5T618_MAX_REG,
.cache_type = REGCACHE_RBTREE,
};
static struct rn5t618 *rn5t618_pm_power_off;
static void rn5t618_power_off(void)
{
/* disable automatic repower-on */
regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,
RN5T618_REPCNT_REPWRON, 0);
/* start power-off sequence */
regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_SLPCNT,
RN5T618_SLPCNT_SWPWROFF, RN5T618_SLPCNT_SWPWROFF);
}
static int rn5t618_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct rn5t618 *priv;
int ret;
priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
i2c_set_clientdata(i2c, priv);
priv->regmap = devm_regmap_init_i2c(i2c, &rn5t618_regmap_config);
if (IS_ERR(priv->regmap)) {
ret = PTR_ERR(priv->regmap);
dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
return ret;
}
ret = mfd_add_devices(&i2c->dev, -1, rn5t618_cells,
ARRAY_SIZE(rn5t618_cells), NULL, 0, NULL);
if (ret) {
dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
return ret;
}
if (!pm_power_off) {
rn5t618_pm_power_off = priv;
pm_power_off = rn5t618_power_off;
}
return 0;
}
static int rn5t618_i2c_remove(struct i2c_client *i2c)
{
struct rn5t618 *priv = i2c_get_clientdata(i2c);
if (priv == rn5t618_pm_power_off) {
rn5t618_pm_power_off = NULL;
pm_power_off = NULL;
}
mfd_remove_devices(&i2c->dev);
return 0;
}
static const struct of_device_id rn5t618_of_match[] = {
{ .compatible = "ricoh,rn5t618" },
{ }
};
MODULE_DEVICE_TABLE(of, rn5t618_of_match);
static const struct i2c_device_id rn5t618_i2c_id[] = {
{ }
};
MODULE_DEVICE_TABLE(i2c, rn5t618_i2c_id);
static struct i2c_driver rn5t618_i2c_driver = {
.driver = {
.name = "rn5t618",
.of_match_table = of_match_ptr(rn5t618_of_match),
},
.probe = rn5t618_i2c_probe,
.remove = rn5t618_i2c_remove,
.id_table = rn5t618_i2c_id,
};
module_i2c_driver(rn5t618_i2c_driver);
MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
MODULE_DESCRIPTION("Ricoh RN5T618 MFD driver");
MODULE_LICENSE("GPL v2");
|
