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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/i2c/at24.h
4 #include <linux/types.h>
5 #include <linux/memory.h>
8 * As seen through Linux I2C, differences between the most common types of I2C
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...)?
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!
19 struct at24_platform_data
{
20 u32 byte_len
; /* size (sum of all addr) */
21 u16 page_size
; /* for writes */
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) */
28 void (*setup
)(struct memory_accessor
*, void *context
);
32 #endif /* _LINUX_AT24_H */