i2c: Let users select algorithm drivers manually again

Jean Delvare · Jean Delvare · commit 8d24f8dcb7ea · 2008-08-10T22:56:15.000+02:00
In kernel 2.6.26, the ability to select I2C algorithm drivers manually was removed, as all in-kernel drivers do that automatically. However there were some complaints that it was a problem for out-of-tree I2C bus drivers. In order to address these complaints, let's allow manual selection of these drivers again, but still hide them by default for better general user experience. This closes bug #11140: http://bugzilla.kernel.org/show_bug.cgi?id=11140 Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
@@ -38,6 +38,20 @@ config I2C_CHARDEV
 	  This support is also available as a module.  If so, the module 
 	  will be called i2c-dev.
 
+config I2C_HELPER_AUTO
+	bool "Autoselect pertinent helper modules"
+	default y
+	help
+	  Some I2C bus drivers require so-called "I2C algorithm" modules
+	  to work. These are basically software-only abstractions of generic
+	  I2C interfaces. This option will autoselect them so that you don't
+	  have to care.
+
+	  Unselect this only if you need to enable additional helper
+	  modules, for example for use with external I2C bus drivers.
+
+	  In doubt, say Y.
+
 source drivers/i2c/algos/Kconfig
 source drivers/i2c/busses/Kconfig
 source drivers/i2c/chips/Kconfig
diff --git a/drivers/i2c/algos/Kconfig b/drivers/i2c/algos/Kconfig
@@ -2,15 +2,20 @@
 # I2C algorithm drivers configuration
 #
 
+menu "I2C Algorithms"
+	depends on !I2C_HELPER_AUTO
+
 config I2C_ALGOBIT
-	tristate
+	tristate "I2C bit-banging interfaces"
 
 config I2C_ALGOPCF
-	tristate
+	tristate "I2C PCF 8584 interfaces"
 
 config I2C_ALGOPCA
-	tristate
+	tristate "I2C PCA 9564 interfaces"
 
 config I2C_ALGO_SGI
 	tristate
 	depends on SGI_IP22 || SGI_IP32 || X86_VISWS
+
+endmenu
