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[PATCH] SPI eeprom driver

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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>
This commit is contained in:
David Brownell 2007-02-12 00:52:48 -08:00 • committed by Linus Torvalds
parent 3925a5ce44
commit b587b13a4f
4 changed files with 414 additions and 0 deletions
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10
drivers/spi/Kconfig
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@ -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