1#ifndef _LINUX_AT24_H 2#define _LINUX_AT24_H 3 4#include <linux/types.h> 5#include <linux/memory.h> 6 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) */ 27 28 void (*setup)(struct memory_accessor *, void *context); 29 void *context; 30}; 31 32#endif /* _LINUX_AT24_H */ 33