1#ifndef __LINUX_SPI_EEPROM_H
2#define __LINUX_SPI_EEPROM_H
3
4#include <linux/memory.h>
5
6/*
7 * Put one of these structures in platform_data for SPI EEPROMS handled
8 * by the "at25" driver.  On SPI, most EEPROMS understand the same core
9 * command set.  If you need to support EEPROMs that don't yet fit, add
10 * flags to support those protocol options.  These values all come from
11 * the chip datasheets.
12 */
13struct spi_eeprom {
14	u32		byte_len;
15	char		name[10];
16	u16		page_size;		/* for writes */
17	u16		flags;
18#define	EE_ADDR1	0x0001			/*  8 bit addrs */
19#define	EE_ADDR2	0x0002			/* 16 bit addrs */
20#define	EE_ADDR3	0x0004			/* 24 bit addrs */
21#define	EE_READONLY	0x0008			/* disallow writes */
22
23	/*
24	 * Certain EEPROMS have a size that is larger than the number of address
25	 * bytes would allow (e.g. like M95040 from ST that has 512 Byte size
26	 * but uses only one address byte (A0 to A7) for addressing.) For
27	 * the extra address bit (A8, A16 or A24) bit 3 of the instruction byte
28	 * is used. This instruction bit is normally defined as don't care for
29	 * other AT25 like chips.
30	 */
31#define EE_INSTR_BIT3_IS_ADDR	0x0010
32
33	/* for exporting this chip's data to other kernel code */
34	void (*setup)(struct memory_accessor *mem, void *context);
35	void *context;
36};
37
38#endif /* __LINUX_SPI_EEPROM_H */
39