at91: Kconfig simplification

Instead of adding "depends on" at config level, introduce HAVE_* config
variables. Add them at machine or soc level to specify the ability of a
particular support.
It will ease new board introduction and readability.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>

arch/arm/mach-at91/Kconfig

@@ -1,5 +1,20 @@
 if ARCH_AT91
 
+config HAVE_AT91_DATAFLASH_CARD
+	bool
+
+config HAVE_NAND_ATMEL_BUSWIDTH_16
+	bool
+
+config HAVE_AT91_USART3
+	bool
+
+config HAVE_AT91_USART4
+	bool
+
+config HAVE_AT91_USART5
+	bool
+
 menu "Atmel AT91 System-on-Chip"
 
 choice
@@ -10,12 +25,16 @@ config ARCH_AT91RM9200
 	select CPU_ARM920T
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
+	select HAVE_AT91_USART3
 
 config ARCH_AT91SAM9260
 	bool "AT91SAM9260 or AT91SAM9XE"
 	select CPU_ARM926T
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
+	select HAVE_AT91_USART3
+	select HAVE_AT91_USART4
+	select HAVE_AT91_USART5
 
 config ARCH_AT91SAM9261
 	bool "AT91SAM9261"
@@ -40,18 +59,23 @@ config ARCH_AT91SAM9RL
 	select CPU_ARM926T
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
+	select HAVE_AT91_USART3
 
 config ARCH_AT91SAM9G20
 	bool "AT91SAM9G20"
 	select CPU_ARM926T
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
+	select HAVE_AT91_USART3
+	select HAVE_AT91_USART4
+	select HAVE_AT91_USART5
 
 config ARCH_AT91SAM9G45
 	bool "AT91SAM9G45"
 	select CPU_ARM926T
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
+	select HAVE_AT91_USART3
 
 config ARCH_AT91CAP9
 	bool "AT91CAP9"
@@ -82,12 +106,14 @@ config MACH_ONEARM
 
 config ARCH_AT91RM9200DK
 	bool "Atmel AT91RM9200-DK Development board"
+	select HAVE_AT91_DATAFLASH_CARD
 	help
 	  Select this if you are using Atmel's AT91RM9200-DK Development board.
 	  (Discontinued)
 
 config MACH_AT91RM9200EK
 	bool "Atmel AT91RM9200-EK Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
 	help
 	  Select this if you are using Atmel's AT91RM9200-EK Evaluation Kit.
 	  <http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3507>
@@ -135,6 +161,7 @@ config MACH_KAFA
 
 config MACH_ECBAT91
 	bool "emQbit ECB_AT91 SBC"
+	select HAVE_AT91_DATAFLASH_CARD
 	help
 	  Select this if you are using emQbit's ECB_AT91 board.
 	  <http://wiki.emqbit.com/free-ecb-at91>
@@ -168,6 +195,8 @@ comment "AT91SAM9260 / AT91SAM9XE Board Type"
 
 config MACH_AT91SAM9260EK
 	bool "Atmel AT91SAM9260-EK / AT91SAM9XE Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91SAM9260-EK or AT91SAM9XE Evaluation Kit
 	  <http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3933>
@@ -180,6 +209,7 @@ config MACH_CAM60
 
 config MACH_SAM9_L9260
 	bool "Olimex SAM9-L9260 board"
+	select HAVE_AT91_DATAFLASH_CARD
 	help
 	  Select this if you are using Olimex's SAM9-L9260 board based on the Atmel AT91SAM9260.
 	  <http://www.olimex.com/dev/sam9-L9260.html>
@@ -220,6 +250,8 @@ comment "AT91SAM9261 Board Type"
 
 config MACH_AT91SAM9261EK
 	bool "Atmel AT91SAM9261-EK Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91SAM9261-EK Evaluation Kit.
 	  <http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3820>
@@ -234,6 +266,8 @@ comment "AT91SAM9G10 Board Type"
 
 config MACH_AT91SAM9G10EK
 	bool "Atmel AT91SAM9G10-EK Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91SAM9G10-EK Evaluation Kit.
 	  <http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4588>
@@ -248,6 +282,8 @@ comment "AT91SAM9263 Board Type"
 
 config MACH_AT91SAM9263EK
 	bool "Atmel AT91SAM9263-EK Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91SAM9263-EK Evaluation Kit.
 	  <http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4057>
@@ -260,6 +296,7 @@ config MACH_USB_A9263
 
 config MACH_NEOCORE926
 	bool "Adeneo NEOCORE926"
+	select HAVE_AT91_DATAFLASH_CARD
 	help
 	  Select this if you are using the Adeneo Neocore 926 board.
 
@@ -286,12 +323,15 @@ comment "AT91SAM9G20 Board Type"
 
 config MACH_AT91SAM9G20EK
 	bool "Atmel AT91SAM9G20-EK Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91SAM9G20-EK Evaluation Kit
 	  that embeds only one SD/MMC slot.
 
 config MACH_AT91SAM9G20EK_2MMC
 	bool "Atmel AT91SAM9G20-EK Evaluation Kit with 2 SD/MMC Slots"
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using an Atmel AT91SAM9G20-EK Evaluation Kit
 	  with 2 SD/MMC Slots. This is the case for AT91SAM9G20-EK rev. C and
@@ -313,6 +353,7 @@ comment "AT91SAM9G45 Board Type"
 
 config MACH_AT91SAM9G45EKES
 	bool "Atmel AT91SAM9G45-EKES Evaluation Kit"
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91SAM9G45-EKES Evaluation Kit.
 	  "ES" at the end of the name means that this board is an
@@ -328,6 +369,8 @@ comment "AT91CAP9 Board Type"
 
 config MACH_AT91CAP9ADK
 	bool "Atmel AT91CAP9A-DK Evaluation Kit"
+	select HAVE_AT91_DATAFLASH_CARD
+	select HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  Select this if you are using Atmel's AT91CAP9A-DK Evaluation Kit.
 	  <http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4138>
@@ -356,13 +399,13 @@ comment "AT91 Board Options"
 
 config MTD_AT91_DATAFLASH_CARD
 	bool "Enable DataFlash Card support"
-	depends on (ARCH_AT91RM9200DK || MACH_AT91RM9200EK || MACH_AT91SAM9260EK || MACH_AT91SAM9261EK || MACH_AT91SAM9G10EK || MACH_AT91SAM9263EK || MACH_AT91SAM9G20EK || MACH_ECBAT91 || MACH_SAM9_L9260 || MACH_AT91CAP9ADK || MACH_NEOCORE926)
+	depends on HAVE_AT91_DATAFLASH_CARD
 	help
 	  Enable support for the DataFlash card.
 
 config MTD_NAND_ATMEL_BUSWIDTH_16
 	bool "Enable 16-bit data bus interface to NAND flash"
-	depends on (MACH_AT91SAM9260EK || MACH_AT91SAM9261EK || MACH_AT91SAM9G10EK || MACH_AT91SAM9263EK || MACH_AT91SAM9G20EK || MACH_AT91SAM9G20EK_2MMC || MACH_AT91SAM9G45EKES || MACH_AT91CAP9ADK)
+	depends on HAVE_NAND_ATMEL_BUSWIDTH_16
 	help
 	  On AT91SAM926x boards both types of NAND flash can be present
 	  (8 and 16 bit data bus width).
@@ -424,15 +467,15 @@ config AT91_EARLY_USART2
 
 config AT91_EARLY_USART3
 	bool "USART3"
-	depends on (ARCH_AT91RM9200 || ARCH_AT91SAM9RL || ARCH_AT91SAM9260 || ARCH_AT91SAM9G20 || ARCH_AT91SAM9G45)
+	depends on HAVE_AT91_USART3
 
 config AT91_EARLY_USART4
 	bool "USART4"
-	depends on ARCH_AT91SAM9260 || ARCH_AT91SAM9G20
+	depends on HAVE_AT91_USART4
 
 config AT91_EARLY_USART5
 	bool "USART5"
-	depends on ARCH_AT91SAM9260 || ARCH_AT91SAM9G20
+	depends on HAVE_AT91_USART5
 
 endchoice