[ARM] 3593/1: Add reboot and shutdown handlers for Zaurus handhelds

Patch from Richard Purdie

Add functionality to allow machine specific reboot handlers on ARM.
Add machine specific reboot and poweroff handlers for all PXA Zaurus
models.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 76c0e7f0a219..afa223b9e7a2 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -19,12 +19,14 @@
 #include <linux/fs.h>
 #include <linux/interrupt.h>
 #include <linux/mmc/host.h>
+#include <linux/pm.h>
 
 #include <asm/setup.h>
 #include <asm/memory.h>
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
 #include <asm/irq.h>
+#include <asm/system.h>
 #include <asm/arch/irda.h>
 #include <asm/arch/mmc.h>
 #include <asm/arch/udc.h>
@@ -266,8 +268,31 @@ static struct platform_device *devices[] __initdata = {
         &tosaled_device,
 };
 
+static void tosa_poweroff(void)
+{
+        RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
+
+        pxa_gpio_mode(TOSA_GPIO_ON_RESET | GPIO_OUT);
+        GPSR(TOSA_GPIO_ON_RESET) = GPIO_bit(TOSA_GPIO_ON_RESET);
+
+        mdelay(1000);
+        arm_machine_restart('h');
+}
+
+static void tosa_restart(char mode)
+{
+        /* Bootloader magic for a reboot */
+        if((MSC0 & 0xffff0000) == 0x7ff00000)
+                MSC0 = (MSC0 & 0xffff) | 0x7ee00000;
+
+        tosa_poweroff();
+}
+
 static void __init tosa_init(void)
 {
+        pm_power_off = tosa_poweroff;
+        arm_pm_restart = tosa_restart;
+
         pxa_gpio_mode(TOSA_GPIO_ON_RESET | GPIO_IN);
         pxa_gpio_mode(TOSA_GPIO_TC6393_INT | GPIO_IN);
         pxa_gpio_mode(TOSA_GPIO_USB_IN | GPIO_IN);