/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_SPI_EEPROM_H
#define __LINUX_SPI_EEPROM_H
#include <linux/memory.h>
/*
* Put one of these structures in platform_data for SPI EEPROMS handled
* by the " at25 " driver . On SPI , most EEPROMS understand the same core
* command set . If you need to support EEPROMs that don ' t yet fit , add
* flags to support those protocol options . These values all come from
* the chip datasheets .
*/
struct spi_eeprom {
u32 byte_len;
char name[10 ];
u32 page_size; /* for writes */
u16 flags;
#define EE_ADDR1 0 x0001 /* 8 bit addrs */
#define EE_ADDR2 0 x0002 /* 16 bit addrs */
#define EE_ADDR3 0 x0004 /* 24 bit addrs */
#define EE_READONLY 0 x0008 /* disallow writes */
/*
* Certain EEPROMS have a size that is larger than the number of address
* bytes would allow ( e . g . like M95040 from ST that has 512 Byte size
* but uses only one address byte ( A0 to A7 ) for addressing . ) For
* the extra address bit ( A8 , A16 or A24 ) bit 3 of the instruction byte
* is used . This instruction bit is normally defined as don ' t care for
* other AT25 like chips .
*/
#define EE_INSTR_BIT3_IS_ADDR 0 x0010
void *context;
};
#endif /* __LINUX_SPI_EEPROM_H */
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