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
|
/*
* Copyright (c) 2014 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/err.h>
#include <dm.h>
#include <i2c.h>
#include <i2c_eeprom.h>
int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
{
const struct i2c_eeprom_ops *ops = device_get_ops(dev);
if (!ops->read)
return -ENOSYS;
return ops->read(dev, offset, buf, size);
}
int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
{
const struct i2c_eeprom_ops *ops = device_get_ops(dev);
if (!ops->write)
return -ENOSYS;
return ops->write(dev, offset, buf, size);
}
static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
int size)
{
return dm_i2c_read(dev, offset, buf, size);
}
static int i2c_eeprom_std_write(struct udevice *dev, int offset,
const uint8_t *buf, int size)
{
return -ENODEV;
}
struct i2c_eeprom_ops i2c_eeprom_std_ops = {
.read = i2c_eeprom_std_read,
.write = i2c_eeprom_std_write,
};
static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
{
struct i2c_eeprom *priv = dev_get_priv(dev);
u64 data = dev_get_driver_data(dev);
/* 6 bit -> page size of up to 2^63 (should be sufficient) */
priv->pagewidth = data & 0x3F;
priv->pagesize = (1 << priv->pagewidth);
return 0;
}
int i2c_eeprom_std_probe(struct udevice *dev)
{
return 0;
}
static const struct udevice_id i2c_eeprom_std_ids[] = {
{ .compatible = "i2c-eeprom", .data = 0 },
{ .compatible = "atmel,24c01a", .data = 3 },
{ .compatible = "atmel,24c02", .data = 3 },
{ .compatible = "atmel,24c04", .data = 4 },
{ .compatible = "atmel,24c08a", .data = 4 },
{ .compatible = "atmel,24c16a", .data = 4 },
{ .compatible = "atmel,24c32", .data = 5 },
{ .compatible = "atmel,24c64", .data = 5 },
{ .compatible = "atmel,24c128", .data = 6 },
{ .compatible = "atmel,24c256", .data = 6 },
{ .compatible = "atmel,24c512", .data = 6 },
{ }
};
U_BOOT_DRIVER(i2c_eeprom_std) = {
.name = "i2c_eeprom",
.id = UCLASS_I2C_EEPROM,
.of_match = i2c_eeprom_std_ids,
.probe = i2c_eeprom_std_probe,
.ofdata_to_platdata = i2c_eeprom_std_ofdata_to_platdata,
.priv_auto_alloc_size = sizeof(struct i2c_eeprom),
.ops = &i2c_eeprom_std_ops,
};
UCLASS_DRIVER(i2c_eeprom) = {
.id = UCLASS_I2C_EEPROM,
.name = "i2c_eeprom",
};
|
