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#include <linux/errno.h>
10
11struct udevice;
12
13struct i2c_eeprom_ops {
14	int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
15	int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
16		     int size);
17	int (*size)(struct udevice *dev);
18};
19
20struct i2c_eeprom {
21	/* The EEPROM's page size in byte */
22	unsigned long pagesize;
23	/* The EEPROM's capacity in bytes */
24	unsigned long size;
25};
26
27#if CONFIG_IS_ENABLED(I2C_EEPROM)
28/*
29 * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
30 *
31 * @dev:	Chip to read from
32 * @offset:	Offset within chip to start reading
33 * @buf:	Place to put data
34 * @size:	Number of bytes to read
35 *
36 * Return: 0 on success, -ve on failure
37 */
38int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
39
40/*
41 * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
42 *
43 * @dev:	Chip to write to
44 * @offset:	Offset within chip to start writing
45 * @buf:	Buffer containing data to write
46 * @size:	Number of bytes to write
47 *
48 * Return: 0 on success, -ve on failure
49 */
50int i2c_eeprom_write(struct udevice *dev, int offset, const uint8_t *buf,
51		     int size);
52
53/*
54 * i2c_eeprom_size() - get size of I2C EEPROM chip
55 *
56 * @dev:	Chip to query
57 *
58 * Return: +ve size in bytes on success, -ve on failure
59 */
60int i2c_eeprom_size(struct udevice *dev);
61
62#else /* !I2C_EEPROM */
63
64static inline int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
65				  int size)
66{
67	return -ENOSYS;
68}
69
70static inline int i2c_eeprom_write(struct udevice *dev, int offset,
71				   const uint8_t *buf, int size)
72{
73	return -ENOSYS;
74}
75
76static inline int i2c_eeprom_size(struct udevice *dev)
77{
78	return -ENOSYS;
79}
80
81#endif /* I2C_EEPROM */
82
83#endif
84