ARM: at91: make use of the new AIC driver for dt enabled boards

Remove selection of OLD_IRQ_AT91 when selecting dt boards.
Select ATMEL_AIC_IRQ for sama5 SoCs (a kernel compiled for this SoC will
always use ATMEL_AIC_IRQ driver).
Select ATMEL_AIC_IRQ for at91rm9200 and at91sam9 SoCs only if OLD_IRQ_AT91
is not selected (which means we are compiling a pure DT kernel, without
any legacy board support).

Remove specific irq init code in all dt board files: this init procedure
is automatically handled in of_irq_init which is called by the arm irq core
code and is in charge of calling the appropriate aic init functions.

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

arch/arm/mach-at91/Kconfig

@@ -50,12 +50,14 @@ config HAVE_AT91_SMD
 config SOC_AT91SAM9
 	bool
 	select AT91_SAM9_TIME
+	select ATMEL_AIC_IRQ if !OLD_IRQ_AT91
 	select CPU_ARM926T
 	select GENERIC_CLOCKEVENTS
 
 config SOC_SAMA5
 	bool
 	select AT91_SAM9_TIME
+	select ATMEL_AIC5_IRQ
 	select CPU_V7
 	select GENERIC_CLOCKEVENTS
 	select USE_OF
@@ -108,6 +110,7 @@ endif
 if SOC_SAM_V4_V5
 config SOC_AT91RM9200
 	bool "AT91RM9200"
+	select ATMEL_AIC_IRQ if !OLD_IRQ_AT91
 	select CPU_ARM920T
 	select GENERIC_CLOCKEVENTS
 	select HAVE_AT91_DBGU0
@@ -193,7 +196,6 @@ 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
@@ -202,7 +204,6 @@ 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
@@ -211,7 +212,6 @@ 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/board-dt-rm9200.c

@@ -24,17 +24,6 @@
 #include "at91_aic.h"
 #include "generic.h"
 
-
-static const struct of_device_id irq_of_match[] __initconst = {
-	{ .compatible = "atmel,at91rm9200-aic", .data = at91_aic_of_init },
-	{ /*sentinel*/ }
-};
-
-static void __init at91rm9200_dt_init_irq(void)
-{
-	of_irq_init(irq_of_match);
-}
-
 static const char *at91rm9200_dt_board_compat[] __initdata = {
 	"atmel,at91rm9200",
 	NULL
@@ -43,8 +32,6 @@ static const char *at91rm9200_dt_board_compat[] __initdata = {
 DT_MACHINE_START(at91rm9200_dt, "Atmel AT91RM9200 (Device Tree)")
 	.init_time      = at91rm9200_timer_init,
 	.map_io		= at91_map_io,
-	.handle_irq	= at91_aic_handle_irq,
 	.init_early	= at91rm9200_dt_initialize,
-	.init_irq	= at91rm9200_dt_init_irq,
 	.dt_compat	= at91rm9200_dt_board_compat,
 MACHINE_END

arch/arm/mach-at91/board-dt-sam9.c

@@ -34,17 +34,6 @@ static void __init sam9_dt_timer_init(void)
 	at91sam926x_pit_init();
 }
 
-static const struct of_device_id irq_of_match[] __initconst = {
-
-	{ .compatible = "atmel,at91rm9200-aic", .data = at91_aic_of_init },
-	{ /*sentinel*/ }
-};
-
-static void __init at91_dt_init_irq(void)
-{
-	of_irq_init(irq_of_match);
-}
-
 static const char *at91_dt_board_compat[] __initdata = {
 	"atmel,at91sam9",
 	NULL
@@ -54,8 +43,6 @@ DT_MACHINE_START(at91sam_dt, "Atmel AT91SAM (Device Tree)")
 	/* Maintainer: Atmel */
 	.init_time	= sam9_dt_timer_init,
 	.map_io		= at91_map_io,
-	.handle_irq	= at91_aic_handle_irq,
 	.init_early	= at91_dt_initialize,
-	.init_irq	= at91_dt_init_irq,
 	.dt_compat	= at91_dt_board_compat,
 MACHINE_END

arch/arm/mach-at91/board-dt-sama5.c

@@ -35,17 +35,6 @@ static void __init sama5_dt_timer_init(void)
 	at91sam926x_pit_init();
 }
 
-static const struct of_device_id irq_of_match[] __initconst = {
-
-	{ .compatible = "atmel,sama5d3-aic", .data = at91_aic5_of_init },
-	{ /*sentinel*/ }
-};
-
-static void __init at91_dt_init_irq(void)
-{
-	of_irq_init(irq_of_match);
-}
-
 static int ksz9021rn_phy_fixup(struct phy_device *phy)
 {
 	int value;
@@ -82,9 +71,7 @@ DT_MACHINE_START(sama5_dt, "Atmel SAMA5 (Device Tree)")
 	/* Maintainer: Atmel */
 	.init_time	= sama5_dt_timer_init,
 	.map_io		= at91_map_io,
-	.handle_irq	= at91_aic5_handle_irq,
 	.init_early	= at91_dt_initialize,
-	.init_irq	= at91_dt_init_irq,
 	.init_machine	= sama5_dt_device_init,
 	.dt_compat	= sama5_dt_board_compat,
 MACHINE_END