mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 08:28:13 +00:00
b587b13a4f
This is adds a simple SPI EEPROM driver, providing access to the EEPROM through sysfs much like the I2C "eeprom" driver ... except this driver supports write access, and multiple EEPROM sizes. From: "Tuppa, Walter" <walter.tuppa@siemens.com> Since I have EEPROMs on SPI with different address sizing, I made some changes to your at25.c to support them. Works perfectly. (Also includes a small bugfix for the "what size address" test.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Walter Tuppa <walter.tuppa@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
22 lines
703 B
C
22 lines
703 B
C
#ifndef __LINUX_SPI_EEPROM_H
|
|
#define __LINUX_SPI_EEPROM_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];
|
|
u16 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 */
|
|
};
|
|
|
|
#endif /* __LINUX_SPI_EEPROM_H */
|