1 files changed, 65 insertions, 0 deletions

diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index b75f70155823..7fb9b5c4669a 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -22,6 +22,8 @@
 #include <linux/interrupt.h>
 #include <linux/bootmem.h>
 #include <linux/sh_intc.h>
+#include <linux/sysdev.h>
+#include <linux/list.h>
 
 #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
         ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
@@ -40,6 +42,8 @@ struct intc_handle_int {
 };
 
 struct intc_desc_int {
+        struct list_head list;
+        struct sys_device sysdev;
         unsigned long *reg;
 #ifdef CONFIG_SMP
         unsigned long *smp;
@@ -52,6 +56,8 @@ struct intc_desc_int {
         struct irq_chip chip;
 };
 
+static LIST_HEAD(intc_list);
+
 #ifdef CONFIG_SMP
 #define IS_SMP(x) x.smp
 #define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
@@ -232,6 +238,11 @@ static void intc_disable(unsigned int irq)
         }
 }
 
+static int intc_set_wake(unsigned int irq, unsigned int on)
+{
+        return 0; /* allow wakeup, but setup hardware in intc_suspend() */
+}
+
 #if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
 static void intc_mask_ack(unsigned int irq)
 {
@@ -664,6 +675,9 @@ void __init register_intc_controller(struct intc_desc *desc)
 
         d = alloc_bootmem(sizeof(*d));
 
+        INIT_LIST_HEAD(&d->list);
+        list_add(&d->list, &intc_list);
+
         d->nr_reg = desc->mask_regs ? desc->nr_mask_regs * 2 : 0;
         d->nr_reg += desc->prio_regs ? desc->nr_prio_regs * 2 : 0;
         d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0;
@@ -711,6 +725,7 @@ void __init register_intc_controller(struct intc_desc *desc)
         d->chip.disable = intc_disable;
         d->chip.shutdown = intc_disable;
         d->chip.set_type = intc_set_sense;
+        d->chip.set_wake = intc_set_wake;
 
 #if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
         if (desc->ack_regs) {
@@ -761,3 +776,53 @@ void __init register_intc_controller(struct intc_desc *desc)
                 intc_register_irq(desc, d, vect->enum_id, evt2irq(vect->vect));
         }
 }
+
+static int intc_suspend(struct sys_device *dev, pm_message_t state)
+{
+        struct intc_desc_int *d;
+        struct irq_desc *desc;
+        int irq;
+
+        /* get intc controller associated with this sysdev */
+        d = container_of(dev, struct intc_desc_int, sysdev);
+
+        /* enable wakeup irqs belonging to this intc controller */
+        for_each_irq_desc(irq, desc) {
+                if ((desc->status & IRQ_WAKEUP) && (desc->chip == &d->chip))
+                        intc_enable(irq);
+        }
+
+        return 0;
+}
+
+static struct sysdev_class intc_sysdev_class = {
+        .name = "intc",
+        .suspend = intc_suspend,
+};
+
+/* register this intc as sysdev to allow suspend/resume */
+static int __init register_intc_sysdevs(void)
+{
+        struct intc_desc_int *d;
+        int error;
+        int id = 0;
+
+        error = sysdev_class_register(&intc_sysdev_class);
+        if (!error) {
+                list_for_each_entry(d, &intc_list, list) {
+                        d->sysdev.id = id;
+                        d->sysdev.cls = &intc_sysdev_class;
+                        error = sysdev_register(&d->sysdev);
+                        if (error)
+                                break;
+                        id++;
+                }
+        }
+
+        if (error)
+                pr_warning("intc: sysdev registration error\n");
+
+        return error;
+}
+
+device_initcall(register_intc_sysdevs);