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authorDavid Brownell <david-b@pacbell.net>2007-02-12 03:52:48 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 12:48:31 -0500
commitb587b13a4f670ebae79ae6259cf44328455e4e69 (patch)
tree36e614fae95d8a2c888190d162e67ec95d144304 /include
parent3925a5ce44330767f7f0de5c58c6a797009f0f75 (diff)
[PATCH] SPI eeprom driver
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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/spi/eeprom.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/spi/eeprom.h b/include/linux/spi/eeprom.h
new file mode 100644
index 000000000000..1085212c446e
--- /dev/null
+++ b/include/linux/spi/eeprom.h
@@ -0,0 +1,22 @@
1#ifndef __LINUX_SPI_EEPROM_H
2#define __LINUX_SPI_EEPROM_H
3
4/*
5 * Put one of these structures in platform_data for SPI EEPROMS handled
6 * by the "at25" driver. On SPI, most EEPROMS understand the same core
7 * command set. If you need to support EEPROMs that don't yet fit, add
8 * flags to support those protocol options. These values all come from
9 * the chip datasheets.
10 */
11struct spi_eeprom {
12 u32 byte_len;
13 char name[10];
14 u16 page_size; /* for writes */
15 u16 flags;
16#define EE_ADDR1 0x0001 /* 8 bit addrs */
17#define EE_ADDR2 0x0002 /* 16 bit addrs */
18#define EE_ADDR3 0x0004 /* 24 bit addrs */
19#define EE_READONLY 0x0008 /* disallow writes */
20};
21
22#endif /* __LINUX_SPI_EEPROM_H */