i2c: slave-eeprom: add eeprom simulator driver

The first user of the i2c-slave interface is an eeprom simulator. It is
a shared memory which can be accessed by the remote master via I2C and
locally via sysfs.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index b51a402..8c9e619 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -110,6 +110,16 @@
 
 	  If you don't know what to do here, definitely say N.
 
+config I2C_SLAVE
+	bool "I2C slave support"
+
+if I2C_SLAVE
+
+config I2C_SLAVE_EEPROM
+	tristate "I2C eeprom slave driver"
+
+endif
+
 config I2C_DEBUG_CORE
 	bool "I2C Core debugging messages"
 	help