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
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017, Linaro Ltd.
#include <linux/regmap.h>
#include <linux/slimbus.h>
#include <linux/module.h>
#include "internal.h"
static int regmap_slimbus_byte_reg_read(void *context, unsigned int reg,
unsigned int *val)
{
struct slim_device *sdev = context;
int v;
v = slim_readb(sdev, reg);
if (v < 0)
return v;
*val = v;
return 0;
}
static int regmap_slimbus_byte_reg_write(void *context, unsigned int reg,
unsigned int val)
{
struct slim_device *sdev = context;
return slim_writeb(sdev, reg, val);
}
static struct regmap_bus regmap_slimbus_bus = {
.reg_write = regmap_slimbus_byte_reg_write,
.reg_read = regmap_slimbus_byte_reg_read,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
.val_format_endian_default = REGMAP_ENDIAN_LITTLE,
};
static const struct regmap_bus *regmap_get_slimbus(struct slim_device *slim,
const struct regmap_config *config)
{
if (config->val_bits == 8 && config->reg_bits == 16)
return ®map_slimbus_bus;
return ERR_PTR(-ENOTSUPP);
}
struct regmap *__regmap_init_slimbus(struct slim_device *slimbus,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name)
{
const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config);
if (IS_ERR(bus))
return ERR_CAST(bus);
return __regmap_init(&slimbus->dev, bus, &slimbus->dev, config,
lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__regmap_init_slimbus);
struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name)
{
const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config);
if (IS_ERR(bus))
return ERR_CAST(bus);
return __devm_regmap_init(&slimbus->dev, bus, &slimbus, config,
lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__devm_regmap_init_slimbus);
MODULE_LICENSE("GPL v2");
|
