[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>

5 files changed, 41 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 */
diff --git a/arch/arm/mach-at91/at91sam9260.c b/arch/arm/mach-at91/at91sam9260.c
index 18d06612ce8a..ee26550cdc21 100644
--- a/arch/arm/mach-at91/at91sam9260.c
+++ b/arch/arm/mach-at91/at91sam9260.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/pm.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -18,6 +19,7 @@
 #include <asm/arch/at91sam9260.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"
@@ -267,6 +269,11 @@ static void at91sam9260_reset(void)
 	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 }
 
+static void at91sam9260_poweroff(void)
+{
+	at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
+}
+
 
 /* --------------------------------------------------------------------
  *  AT91SAM9260 processor initialization
@@ -304,6 +311,7 @@ void __init at91sam9260_initialize(unsigned long main_clock)
 		iotable_init(at91sam9260_sram_desc, ARRAY_SIZE(at91sam9260_sram_desc));
 
 	at91_arch_reset = at91sam9260_reset;
+	pm_power_off = at91sam9260_poweroff;
 	at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 			| (1 << AT91SAM9260_ID_IRQ2);
 
diff --git a/arch/arm/mach-at91/at91sam9261.c b/arch/arm/mach-at91/at91sam9261.c
index 90b87e1877d9..35bf6fd52516 100644
--- a/arch/arm/mach-at91/at91sam9261.c
+++ b/arch/arm/mach-at91/at91sam9261.c
@@ -11,12 +11,14 @@
  */
 
 #include <linux/module.h>
+#include <linux/pm.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/arch/at91sam9261.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"
@@ -245,6 +247,11 @@ static void at91sam9261_reset(void)
 	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 }
 
+static void at91sam9261_poweroff(void)
+{
+	at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
+}
+
 
 /* --------------------------------------------------------------------
  *  AT91SAM9261 processor initialization
@@ -256,6 +263,7 @@ void __init at91sam9261_initialize(unsigned long main_clock)
 	iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc));
 
 	at91_arch_reset = at91sam9261_reset;
+	pm_power_off = at91sam9261_poweroff;
 	at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
 			| (1 << AT91SAM9261_ID_IRQ2);
 
diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c
index a53ba0f74351..052074a9f2d3 100644
--- a/arch/arm/mach-at91/at91sam9263.c
+++ b/arch/arm/mach-at91/at91sam9263.c
@@ -11,12 +11,14 @@
  */
 
 #include <linux/module.h>
+#include <linux/pm.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/arch/at91sam9263.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"
@@ -271,6 +273,11 @@ static void at91sam9263_reset(void)
 	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 }
 
+static void at91sam9263_poweroff(void)
+{
+	at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
+}
+
 
 /* --------------------------------------------------------------------
  *  AT91SAM9263 processor initialization
@@ -282,6 +289,7 @@ void __init at91sam9263_initialize(unsigned long main_clock)
 	iotable_init(at91sam9263_io_desc, ARRAY_SIZE(at91sam9263_io_desc));
 
 	at91_arch_reset = at91sam9263_reset;
+	pm_power_off = at91sam9263_poweroff;
 	at91_extern_irq = (1 << AT91SAM9263_ID_IRQ0) | (1 << AT91SAM9263_ID_IRQ1);
 
 	/* Init clock subsystem */
diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c
index 4813a35f6cf5..902c79893ec7 100644
--- a/arch/arm/mach-at91/at91sam9rl.c
+++ b/arch/arm/mach-at91/at91sam9rl.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/pm.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -17,6 +18,7 @@
 #include <asm/arch/at91sam9rl.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"
@@ -244,6 +246,11 @@ static void at91sam9rl_reset(void)
 	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 }
 
+static void at91sam9rl_poweroff(void)
+{
+	at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
+}
+
 
 /* --------------------------------------------------------------------
  *  AT91SAM9RL processor initialization
@@ -274,6 +281,7 @@ void __init at91sam9rl_initialize(unsigned long main_clock)
 	iotable_init(at91sam9rl_sram_desc, ARRAY_SIZE(at91sam9rl_sram_desc));
 
 	at91_arch_reset = at91sam9rl_reset;
+	pm_power_off = at91sam9rl_poweroff;
 	at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
 
 	/* Init clock subsystem */