1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Copyright (c) 2014 Google, Inc
4 */
5
6 #ifndef __I2C_EEPROM
7 #define __I2C_EEPROM
8
9 struct udevice;
10
11 struct i2c_eeprom_ops {
12 int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
13 int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
14 int size);
15 int (*size)(struct udevice *dev);
16 };
17
18 struct i2c_eeprom {
19 /* The EEPROM's page size in byte */
20 unsigned long pagesize;
21 /* The EEPROM's capacity in bytes */
22 unsigned long size;
23 };
24
25 #if CONFIG_IS_ENABLED(I2C_EEPROM)
26 /*
27 * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
28 *
29 * @dev: Chip to read from
30 * @offset: Offset within chip to start reading
31 * @buf: Place to put data
32 * @size: Number of bytes to read
33 *
34 * Return: 0 on success, -ve on failure
35 */
36 int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
37
38 /*
39 * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
40 *
41 * @dev: Chip to write to
42 * @offset: Offset within chip to start writing
43 * @buf: Buffer containing data to write
44 * @size: Number of bytes to write
45 *
46 * Return: 0 on success, -ve on failure
47 */
48 int i2c_eeprom_write(struct udevice *dev, int offset, const uint8_t *buf,
49 int size);
50
51 /*
52 * i2c_eeprom_size() - get size of I2C EEPROM chip
53 *
54 * @dev: Chip to query
55 *
56 * Return: +ve size in bytes on success, -ve on failure
57 */
58 int i2c_eeprom_size(struct udevice *dev);
59
60 #else /* !I2C_EEPROM */
61
i2c_eeprom_read(struct udevice * dev,int offset,uint8_t * buf,int size)62 static inline int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
63 int size)
64 {
65 return -ENOSYS;
66 }
67
i2c_eeprom_write(struct udevice * dev,int offset,const uint8_t * buf,int size)68 static inline int i2c_eeprom_write(struct udevice *dev, int offset,
69 const uint8_t *buf, int size)
70 {
71 return -ENOSYS;
72 }
73
i2c_eeprom_size(struct udevice * dev)74 static inline int i2c_eeprom_size(struct udevice *dev)
75 {
76 return -ENOSYS;
77 }
78
79 #endif /* I2C_EEPROM */
80
81 #endif
82