Add descriptions of GPIO port interrupt disable configs

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2845 42af7a65-404d-4744-a932-0658087f49c3

configs/eagle100/README.txt

@@ -282,6 +282,21 @@ Eagle100-specific Configuration Options
 	   the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
 	   the delay actually is 100 seconds.
 
+  There are configurations for disabling support for interrupts GPIO ports.
+  GPIOH and GPIOJ must be disabled because they do not exist on the LM3S6918.
+  Additional interrupt support can be disabled if desired to reduce memory
+  footprint.
+
+	CONFIG_LM3S_DISABLE_GPIOA_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOB_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOC_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOD_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOE_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOF_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOG_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOH_IRQS=y
+	CONFIG_LM3S_DISABLE_GPIOJ_IRQS=y
+ 
   LM3S6818 specific device driver settings
 
 	CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the

configs/lm3s6965-ek/README.txt

@@ -347,6 +347,21 @@ Stellaris LM3S6965 Evaluation Kit Configuration Options
 	   the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
 	   the delay actually is 100 seconds.
 
+  There are configurations for disabling support for interrupts GPIO ports.
+  GPIOJ must be disabled because it does not exist on the LM3S6918.
+  Additional interrupt support can be disabled if desired to reduce memory
+  footprint.
+
+	CONFIG_LM3S_DISABLE_GPIOA_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOB_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOC_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOD_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOE_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOF_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOG_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOH_IRQS=n
+	CONFIG_LM3S_DISABLE_GPIOJ_IRQS=y
+ 
   LM3S6818 specific device driver settings
 
 	CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the