/* 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 0x0001 /* 8 bit addrs */
|
#define EE_ADDR2 0x0002 /* 16 bit addrs */
|
#define EE_ADDR3 0x0004 /* 24 bit addrs */
|
#define EE_READONLY 0x0008 /* 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 0x0010
|
|
void *context;
|
};
|
|
#endif /* __LINUX_SPI_EEPROM_H */
|
