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
|
/*
* Broadcom BCM590xx PMU
*
* 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/i2c.h>
#include <linux/init.h>
#include <linux/mfd/bcm590xx.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
static const struct mfd_cell bcm590xx_devs[] = {
{
.name = "bcm590xx-vregs",
},
};
static const struct regmap_config bcm590xx_regmap_config_pri = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BCM590XX_MAX_REGISTER_PRI,
.cache_type = REGCACHE_RBTREE,
};
static const struct regmap_config bcm590xx_regmap_config_sec = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BCM590XX_MAX_REGISTER_SEC,
.cache_type = REGCACHE_RBTREE,
};
static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri,
const struct i2c_device_id *id)
{
struct bcm590xx *bcm590xx;
int ret;
bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL);
if (!bcm590xx)
return -ENOMEM;
i2c_set_clientdata(i2c_pri, bcm590xx);
bcm590xx->dev = &i2c_pri->dev;
bcm590xx->i2c_pri = i2c_pri;
bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri,
&bcm590xx_regmap_config_pri);
if (IS_ERR(bcm590xx->regmap_pri)) {
ret = PTR_ERR(bcm590xx->regmap_pri);
dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret);
return ret;
}
/* Secondary I2C slave address is the base address with A(2) asserted */
bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter,
i2c_pri->addr | BIT(2));
if (IS_ERR_OR_NULL(bcm590xx->i2c_sec)) {
dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
return -ENODEV;
}
i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx);
bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec,
&bcm590xx_regmap_config_sec);
if (IS_ERR(bcm590xx->regmap_sec)) {
ret = PTR_ERR(bcm590xx->regmap_sec);
dev_err(&bcm590xx->i2c_sec->dev,
"secondary regmap init failed: %d\n", ret);
goto err;
}
ret = mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs,
ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
if (ret < 0) {
dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret);
goto err;
}
return 0;
err:
i2c_unregister_device(bcm590xx->i2c_sec);
return ret;
}
static int bcm590xx_i2c_remove(struct i2c_client *i2c)
{
mfd_remove_devices(&i2c->dev);
return 0;
}
static const struct of_device_id bcm590xx_of_match[] = {
{ .compatible = "brcm,bcm59056" },
{ }
};
MODULE_DEVICE_TABLE(of, bcm590xx_of_match);
static const struct i2c_device_id bcm590xx_i2c_id[] = {
{ "bcm59056" },
{ }
};
MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
static struct i2c_driver bcm590xx_i2c_driver = {
.driver = {
.name = "bcm590xx",
.of_match_table = of_match_ptr(bcm590xx_of_match),
},
.probe = bcm590xx_i2c_probe,
.remove = bcm590xx_i2c_remove,
.id_table = bcm590xx_i2c_id,
};
module_i2c_driver(bcm590xx_i2c_driver);
MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
MODULE_DESCRIPTION("BCM590xx multi-function driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("i2c:bcm590xx");
|
