aboutsummaryrefslogtreecommitdiff
path: root/include/i2c_eeprom.h
blob: bb5c6b118b9345cf277fd1afaf3da74c58499b59 (plain)
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
/*
 * Copyright (c) 2014 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef __I2C_EEPROM
#define __I2C_EEPROM

struct i2c_eeprom_ops {
	int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
	int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
		     int size);
};

struct i2c_eeprom {
	/* The EEPROM's page size in byte */
	unsigned long pagesize;
	/* The EEPROM's page width in bits (pagesize = 2^pagewidth) */
	unsigned pagewidth;
};

/*
 * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
 *
 * @dev:	Chip to read from
 * @offset:	Offset within chip to start reading
 * @buf:	Place to put data
 * @size:	Number of bytes to read
 *
 * @return 0 on success, -ve on failure
 */
int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);

/*
 * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
 *
 * @dev:	Chip to write to
 * @offset:	Offset within chip to start writing
 * @buf:	Buffer containing data to write
 * @size:	Number of bytes to write
 *
 * @return 0 on success, -ve on failure
 */
int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size);

#endif