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- /* 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 */
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