ARM: at91: introduce OLD_IRQ_AT91 Kconfig option

Introduce the OLD_IRQ_AT91 Kconfig option to prepare migration to the
new AIC driver.

Select this option for all at91 SoCs and all available boards so that we
can later move DT enabled boards to the new irq driver and keep the old
implementation when legacy boards are selected.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/Kconfig

@@ -28,6 +28,11 @@ config OLD_CLK_AT91
 	bool
 	default AT91_PMC_UNIT && AT91_USE_OLD_CLK
 
+config OLD_IRQ_AT91
+	bool
+	select MULTI_IRQ_HANDLER
+	select SPARSE_IRQ
+
 config AT91_SAM9_ALT_RESET
 	bool
 	default !ARCH_AT91X40
@@ -47,16 +52,12 @@ config SOC_AT91SAM9
 	select AT91_SAM9_TIME
 	select CPU_ARM926T
 	select GENERIC_CLOCKEVENTS
-	select MULTI_IRQ_HANDLER
-	select SPARSE_IRQ
 
 config SOC_SAMA5
 	bool
 	select AT91_SAM9_TIME
 	select CPU_V7
 	select GENERIC_CLOCKEVENTS
-	select MULTI_IRQ_HANDLER
-	select SPARSE_IRQ
 	select USE_OF
 
 menu "Atmel AT91 System-on-Chip"
@@ -70,8 +71,7 @@ config ARCH_AT91X40
 	depends on !MMU
 	select CPU_ARM7TDMI
 	select ARCH_USES_GETTIMEOFFSET
-	select MULTI_IRQ_HANDLER
-	select SPARSE_IRQ
+	select OLD_IRQ_AT91
 
 	help
 	  Select this if you are using one of Atmel's AT91X40 SoC.
@@ -111,8 +111,6 @@ config SOC_AT91RM9200
 	select CPU_ARM920T
 	select GENERIC_CLOCKEVENTS
 	select HAVE_AT91_DBGU0
-	select MULTI_IRQ_HANDLER
-	select SPARSE_IRQ
 	select HAVE_AT91_USB_CLK
 
 config SOC_AT91SAM9260
@@ -195,6 +193,7 @@ comment "Generic Board Type"
 config MACH_AT91RM9200_DT
 	bool "Atmel AT91RM9200 Evaluation Kits with device-tree support"
 	depends on SOC_AT91RM9200
+	select OLD_IRQ_AT91
 	select USE_OF
 	help
 	  Select this if you want to experiment device-tree with
@@ -203,6 +202,7 @@ config MACH_AT91RM9200_DT
 config MACH_AT91SAM9_DT
 	bool "Atmel AT91SAM Evaluation Kits with device-tree support"
 	depends on SOC_AT91SAM9
+	select OLD_IRQ_AT91
 	select USE_OF
 	help
 	  Select this if you want to experiment device-tree with
@@ -211,6 +211,7 @@ config MACH_AT91SAM9_DT
 config MACH_SAMA5_DT
 	bool "Atmel SAMA5 Evaluation Kits with device-tree support"
 	depends on SOC_SAMA5
+	select OLD_IRQ_AT91
 	select USE_OF
 	select PHYLIB if NETDEVICES
 	help

arch/arm/mach-at91/Kconfig.non_dt

@@ -14,31 +14,37 @@ config ARCH_AT91RM9200
 	bool "AT91RM9200"
 	select SOC_AT91RM9200
 	select AT91_USE_OLD_CLK
+	select OLD_IRQ_AT91
 
 config ARCH_AT91SAM9260
 	bool "AT91SAM9260 or AT91SAM9XE or AT91SAM9G20"
 	select SOC_AT91SAM9260
 	select AT91_USE_OLD_CLK
+	select OLD_IRQ_AT91
 
 config ARCH_AT91SAM9261
 	bool "AT91SAM9261 or AT91SAM9G10"
 	select SOC_AT91SAM9261
 	select AT91_USE_OLD_CLK
+	select OLD_IRQ_AT91
 
 config ARCH_AT91SAM9263
 	bool "AT91SAM9263"
 	select SOC_AT91SAM9263
 	select AT91_USE_OLD_CLK
+	select OLD_IRQ_AT91
 
 config ARCH_AT91SAM9RL
 	bool "AT91SAM9RL"
 	select SOC_AT91SAM9RL
 	select AT91_USE_OLD_CLK
+	select OLD_IRQ_AT91
 
 config ARCH_AT91SAM9G45
 	bool "AT91SAM9G45"
 	select SOC_AT91SAM9G45
 	select AT91_USE_OLD_CLK
+	select OLD_IRQ_AT91
 
 endchoice
 

arch/arm/mach-at91/Makefile

@@ -2,11 +2,12 @@
 # Makefile for the linux kernel.
 #
 
-obj-y		:= irq.o gpio.o setup.o sysirq_mask.o
+obj-y		:= gpio.o setup.o sysirq_mask.o
 obj-m		:=
 obj-n		:=
 obj-		:=
 
+obj-$(CONFIG_OLD_IRQ_AT91)	+= irq.o
 obj-$(CONFIG_OLD_CLK_AT91)	+= clock.o
 obj-$(CONFIG_AT91_SAM9_ALT_RESET) += at91sam9_alt_reset.o
 obj-$(CONFIG_AT91_SAM9G45_RESET) += at91sam9g45_reset.o