29 lines
982 B
C
29 lines
982 B
C
|
#ifndef _LINUX_AT24_H
|
||
|
|
#define _LINUX_AT24_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* As seen through Linux I2C, differences between the most common types of I2C
|
||
|
|
* memory include:
|
||
|
|
* - How much memory is available (usually specified in bit)?
|
||
|
|
* - What write page size does it support?
|
||
|
|
* - Special flags (16 bit addresses, read_only, world readable...)?
|
||
|
|
*
|
||
|
|
* If you set up a custom eeprom type, please double-check the parameters.
|
||
|
|
* Especially page_size needs extra care, as you risk data loss if your value
|
||
|
|
* is bigger than what the chip actually supports!
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct at24_platform_data {
|
||
|
|
u32 byte_len; /* size (sum of all addr) */
|
||
|
|
u16 page_size; /* for writes */
|
||
|
|
u8 flags;
|
||
|
|
#define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */
|
||
|
|
#define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */
|
||
|
|
#define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */
|
||
|
|
#define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif /* _LINUX_AT24_H */
|