tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _LINUX_AT24_H
2#define _LINUX_AT24_H
3
4#include <linux/types.h>
5
6/*
7 * As seen through Linux I2C, differences between the most common types of I2C
8 * memory include:
9 * - How much memory is available (usually specified in bit)?
10 * - What write page size does it support?
11 * - Special flags (16 bit addresses, read_only, world readable...)?
12 *
13 * If you set up a custom eeprom type, please double-check the parameters.
14 * Especially page_size needs extra care, as you risk data loss if your value
15 * is bigger than what the chip actually supports!
16 */
17
18struct at24_platform_data {
19 u32 byte_len; /* size (sum of all addr) */
20 u16 page_size; /* for writes */
21 u8 flags;
22#define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */
23#define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */
24#define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */
25#define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */
26};
27
28#endif /* _LINUX_AT24_H */