Having a separate Kconfig option for i2c-smbus makes it possible to
build that support as a module even when i2c-core itself is built-in.
Bus drivers which implement SMBus alert should select this option, so
in most cases this option is hidden and the user doesn't have to care
about it.

Signed-off-by: Jean Delvare <[email protected]>
Cc: David Brownell <[email protected]>
Cc: Trent Piepho <[email protected]>
---
 drivers/i2c/Kconfig  |   10 ++++++++++
 drivers/i2c/Makefile |    3 ++-
 2 files changed, 12 insertions(+), 1 deletion(-)

--- linux-2.6.33-rc7.orig/drivers/i2c/Kconfig   2010-02-12 14:20:30.000000000 
+0100
+++ linux-2.6.33-rc7/drivers/i2c/Kconfig        2010-02-12 14:20:35.000000000 
+0100
@@ -61,6 +61,16 @@ config I2C_HELPER_AUTO
 
          In doubt, say Y.
 
+config I2C_SMBUS
+       tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
+       help
+         Say Y here if you want support for SMBus extensions to the I2C
+         specification. At the moment, the only supported extension is
+         the SMBus alert protocol.
+
+         This support is also available as a module.  If so, the module
+         will be called i2c-smbus.
+
 source drivers/i2c/algos/Kconfig
 source drivers/i2c/busses/Kconfig
 source drivers/i2c/chips/Kconfig
--- linux-2.6.33-rc7.orig/drivers/i2c/Makefile  2010-02-12 14:20:30.000000000 
+0100
+++ linux-2.6.33-rc7/drivers/i2c/Makefile       2010-02-12 14:20:35.000000000 
+0100
@@ -3,7 +3,8 @@
 #
 
 obj-$(CONFIG_I2C_BOARDINFO)    += i2c-boardinfo.o
-obj-$(CONFIG_I2C)              += i2c-core.o i2c-smbus.o
+obj-$(CONFIG_I2C)              += i2c-core.o
+obj-$(CONFIG_I2C_SMBUS)                += i2c-smbus.o
 obj-$(CONFIG_I2C_CHARDEV)      += i2c-dev.o
 obj-y                          += busses/ chips/ algos/
 

-- 
Jean Delvare
--
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