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Diffstat (limited to 'drivers/sh')
-rw-r--r--drivers/sh/intc.c65
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);