xref: /openbmc/u-boot/drivers/misc/i2c_eeprom.c (revision 730d2544)
1 /*
2  * Copyright (c) 2014 Google, Inc
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <linux/err.h>
9 #include <dm.h>
10 #include <i2c.h>
11 #include <i2c_eeprom.h>
12 
13 static int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
14 			   int size)
15 {
16 	return dm_i2c_read(dev, offset, buf, size);
17 }
18 
19 static int i2c_eeprom_write(struct udevice *dev, int offset,
20 			    const uint8_t *buf, int size)
21 {
22 	return -ENODEV;
23 }
24 
25 struct i2c_eeprom_ops i2c_eeprom_std_ops = {
26 	.read	= i2c_eeprom_read,
27 	.write	= i2c_eeprom_write,
28 };
29 
30 static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
31 {
32 	struct i2c_eeprom *priv = dev_get_priv(dev);
33 	u64 data = dev_get_driver_data(dev);
34 
35 	/* 6 bit -> page size of up to 2^63 (should be sufficient) */
36 	priv->pagewidth = data & 0x3F;
37 	priv->pagesize = (1 << priv->pagewidth);
38 
39 	return 0;
40 }
41 
42 int i2c_eeprom_std_probe(struct udevice *dev)
43 {
44 	return 0;
45 }
46 
47 static const struct udevice_id i2c_eeprom_std_ids[] = {
48 	{ .compatible = "i2c-eeprom", .data = 0 },
49 	{ .compatible = "atmel,24c01a", .data = 3 },
50 	{ .compatible = "atmel,24c02", .data = 3 },
51 	{ .compatible = "atmel,24c04", .data = 4 },
52 	{ .compatible = "atmel,24c08a", .data = 4 },
53 	{ .compatible = "atmel,24c16a", .data = 4 },
54 	{ .compatible = "atmel,24c32", .data = 5 },
55 	{ .compatible = "atmel,24c64", .data = 5 },
56 	{ .compatible = "atmel,24c128", .data = 6 },
57 	{ .compatible = "atmel,24c256", .data = 6 },
58 	{ .compatible = "atmel,24c512", .data = 6 },
59 	{ }
60 };
61 
62 U_BOOT_DRIVER(i2c_eeprom_std) = {
63 	.name			= "i2c_eeprom",
64 	.id			= UCLASS_I2C_EEPROM,
65 	.of_match		= i2c_eeprom_std_ids,
66 	.probe			= i2c_eeprom_std_probe,
67 	.ofdata_to_platdata	= i2c_eeprom_std_ofdata_to_platdata,
68 	.priv_auto_alloc_size	= sizeof(struct i2c_eeprom),
69 	.ops			= &i2c_eeprom_std_ops,
70 };
71 
72 UCLASS_DRIVER(i2c_eeprom) = {
73 	.id		= UCLASS_I2C_EEPROM,
74 	.name		= "i2c_eeprom",
75 };
76