[ARM] 4903/1: [AT91] SAM9/CAP9 system shutdown

Enable system shutdown/power-off on AT91SAM9 and AT91CAP9 based boards.
This does not require power-management to be enabled, and the
pm_power_off method can be overridden in board-specific files if
necessary.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91cap9.c b/arch/arm/mach-at91/at91cap9.c
index 48d27d8000b0..933fa8f55cbc 100644
--- a/arch/arm/mach-at91/at91cap9.c
+++ b/arch/arm/mach-at91/at91cap9.c
@@ -13,12 +13,14 @@
  */
 
 #include <linux/module.h>
+#include <linux/pm.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/arch/at91cap9.h>
 #include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
+#include <asm/arch/at91_shdwc.h>
 
 #include "generic.h"
 #include "clock.h"
@@ -288,6 +290,12 @@ static void at91cap9_reset(void)
         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 }
 
+static void at91cap9_poweroff(void)
+{
+        at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
+}
+
+
 /* --------------------------------------------------------------------
  *  AT91CAP9 processor initialization
  * -------------------------------------------------------------------- */
@@ -298,6 +306,7 @@ void __init at91cap9_initialize(unsigned long main_clock)
         iotable_init(at91cap9_io_desc, ARRAY_SIZE(at91cap9_io_desc));
 
         at91_arch_reset = at91cap9_reset;
+        pm_power_off = at91cap9_poweroff;
         at91_extern_irq = (1 << AT91CAP9_ID_IRQ0) | (1 << AT91CAP9_ID_IRQ1);
 
         /* Init clock subsystem */