[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>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index b217a65453f5..9052f4c3493b 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -135,6 +135,16 @@ config SPI_S3C24XX_GPIO
 comment "SPI Protocol Masters"
         depends on SPI_MASTER
 
+config SPI_AT25
+        tristate "SPI EEPROMs from most vendors"
+        depends on SPI_MASTER && SYSFS
+        help
+          Enable this driver to get read/write support to most SPI EEPROMs,
+          after you configure the board init code to know about each eeprom
+          on your target board.
+
+          This driver can also be built as a module.  If so, the module
+          will be called at25.
 
 #
 # Add new SPI protocol masters in alphabetical order above this line