blob: 8ace93024d60f96cb054f404c3d6381b786eb105 [file] [log] [blame]
Wolfram Sang2b7a5052008-07-14 22:38:35 +02001#ifndef _LINUX_AT24_H
2#define _LINUX_AT24_H
3
4#include <linux/types.h>
Kevin Hilman7274ec82009-04-02 16:56:57 -07005#include <linux/memory.h>
Wolfram Sang2b7a5052008-07-14 22:38:35 +02006
7/*
8 * As seen through Linux I2C, differences between the most common types of I2C
9 * memory include:
10 * - How much memory is available (usually specified in bit)?
11 * - What write page size does it support?
12 * - Special flags (16 bit addresses, read_only, world readable...)?
13 *
14 * If you set up a custom eeprom type, please double-check the parameters.
15 * Especially page_size needs extra care, as you risk data loss if your value
16 * is bigger than what the chip actually supports!
17 */
18
19struct at24_platform_data {
20 u32 byte_len; /* size (sum of all addr) */
21 u16 page_size; /* for writes */
22 u8 flags;
23#define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */
24#define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */
25#define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */
26#define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */
Kevin Hilman7274ec82009-04-02 16:56:57 -070027
28 void (*setup)(struct memory_accessor *, void *context);
29 void *context;
Wolfram Sang2b7a5052008-07-14 22:38:35 +020030};
31
32#endif /* _LINUX_AT24_H */