[ARM] Add sysdev model for Integrator/AP.

diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 69d774aa3287b2639152c87bec49693bc2f19f31..149c626d6e519f4683ff73594c1937cf1cc699c6 100644 (file)
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -24,6 +24,7 @@
 #include <linux/device.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/sysdev.h>
 
 #include <asm/hardware.h>
 #include <asm/io.h>
@@ -133,6 +134,51 @@ static void __init ap_init_irq(void)
        }
 }
 
+#ifdef CONFIG_PM
+static unsigned long ic_irq_enable;
+
+static int irq_suspend(struct sys_device *dev, u32 state)
+{
+       ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
+       return 0;
+}
+
+static int irq_resume(struct sys_device *dev)
+{
+       /* disable all irq sources */
+       writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
+       writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
+       writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
+
+       writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
+       return 0;
+}
+#else
+#define irq_suspend NULL
+#define irq_resume NULL
+#endif
+
+static struct sysdev_class irq_class = {
+       set_kset_name("irq"),
+       .suspend        = irq_suspend,
+       .resume         = irq_resume,
+};
+
+static struct sys_device irq_device = {
+       .id     = 0,
+       .cls    = &irq_class,
+};
+
+static int __init irq_init_sysfs(void)
+{
+       int ret = sysdev_class_register(&irq_class);
+       if (ret == 0)
+               ret = sys_device_register(&irq_device);
+       return ret;
+}
+
+device_initcall(irq_init_sysfs);
+
 /*
  * Flash handling.
  */