[ARM] 3946/1: AT91: at91_arch_reset and at91_extern_irq

The external interrupt sources are different on the various AT91
processors.  This patch introduces the global 'at91_extern_irq' variable
that contains a bitset of the available external interrupt sources.

The processor reset mechanism also differs on the various AT91
processors.  This patch also adds a global 'at91_arch_reset' callback
(from system.h) into the processor-specific code to perform the reset.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/arm/mach-at91rm9200/at91rm9200.c b/arch/arm/mach-at91rm9200/at91rm9200.c
index dcf6136fedf9..0422593032fc 100644
--- a/arch/arm/mach-at91rm9200/at91rm9200.c
+++ b/arch/arm/mach-at91rm9200/at91rm9200.c
@@ -14,6 +14,7 @@
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
+#include <asm/arch/at91rm9200.h>
 
 #include <asm/hardware.h>
 #include "generic.h"
@@ -222,6 +223,16 @@ static struct at91_gpio_bank at91rm9200_gpio[] = {
         }
 };
 
+static void at91rm9200_reset(void)
+{
+        /*
+         * Perform a hardware reset with the use of the Watchdog timer.
+         */
+        at91_sys_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
+        at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
+
 /* --------------------------------------------------------------------
  *  AT91RM9200 processor initialization
  * -------------------------------------------------------------------- */
@@ -230,6 +241,12 @@ void __init at91rm9200_initialize(unsigned long main_clock, unsigned short banks
         /* Map peripherals */
         iotable_init(at91rm9200_io_desc, ARRAY_SIZE(at91rm9200_io_desc));
 
+        at91_arch_reset = at91rm9200_reset;
+        at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
+                        | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
+                        | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
+                        | (1 << AT91RM9200_ID_IRQ6);
+
         /* Init clock subsystem */
         at91_clock_init(main_clock);