[mirror_ubuntu-artful-kernel.git] / include / linux / i2c / at24.h

#ifndef _LINUX_AT24_H
#define _LINUX_AT24_H

#include <linux/types.h>
#include <linux/memory.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) */

	void		(*setup)(struct memory_accessor *, void *context);
	void		*context;
};

#endif /* _LINUX_AT24_H */
Commit	Line	Data
2b7a5056 WS	1	#ifndef _LINUX_AT24_H
	2	#define _LINUX_AT24_H
	3
	4	#include <linux/types.h>
7274ec8b	5	#include <linux/memory.h>
2b7a5056 WS	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
	19	struct 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) */
7274ec8b KH	27
	28	void (setup)(struct memory_accessor , void *context);
	29	void *context;
2b7a5056 WS	30	};
	31
	32	#endif /* _LINUX_AT24_H */