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authorRafael J. Wysocki <rjw@sisk.pl>2011-03-22 20:19:28 +0000
committerPaul Mundt <lethal@linux-sh.org>2011-03-23 18:57:37 +0900
commita696b89c582e3201ef10bfb0d0b3594e29b75e0f (patch)
treef9dbbc6e14d4576c65298e365ad63f24626fdbcd /drivers/sh/intc
parentf47adbb988aa4436135799fd26710bff2c1b1eb6 (diff)
sh: Use struct syscore_ops instead of sysdevs
Convert the SuperH clocks framework and shared interrupt handling code to using struct syscore_ops instead of a sysdev classes and sysdevs for power managment. This reduces the code size significantly and simplifies it. The optimizations causing things not to be restored after creating a hibernation image are removed, but they might lead to undesirable effects during resume from hibernation (e.g. the clocks would be left as the boot kernel set them, which might be not the same way as the hibernated kernel had seen them before the hibernation). This also is necessary for removing sysdevs from the kernel entirely in the future. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/sh/intc')
-rw-r--r--drivers/sh/intc/core.c95
-rw-r--r--drivers/sh/intc/internals.h1
2 files changed, 47 insertions, 49 deletions
diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c
index 9739431092d..5833afbf08d 100644
--- a/drivers/sh/intc/core.c
+++ b/drivers/sh/intc/core.c
@@ -25,6 +25,7 @@
#include <linux/interrupt.h>
#include <linux/sh_intc.h>
#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/radix-tree.h>
@@ -376,91 +377,89 @@ err0:
return -ENOMEM;
}
-static ssize_t
-show_intc_name(struct sys_device *dev, struct sysdev_attribute *attr, char *buf)
+static int intc_suspend(void)
{
struct intc_desc_int *d;
- d = container_of(dev, struct intc_desc_int, sysdev);
+ list_for_each_entry(d, &intc_list, list) {
+ int irq;
- return sprintf(buf, "%s\n", d->chip.name);
-}
+ /* enable wakeup irqs belonging to this intc controller */
+ for_each_active_irq(irq) {
+ struct irq_data *data;
+ struct irq_desc *desc;
+ struct irq_chip *chip;
-static SYSDEV_ATTR(name, S_IRUGO, show_intc_name, NULL);
+ data = irq_get_irq_data(irq);
+ chip = irq_data_get_irq_chip(data);
+ if (chip != &d->chip)
+ continue;
+ desc = irq_to_desc(irq);
+ if ((desc->status & IRQ_WAKEUP))
+ chip->irq_enable(data);
+ }
+ }
+
+ return 0;
+}
-static int intc_suspend(struct sys_device *dev, pm_message_t state)
+static void intc_resume(void)
{
struct intc_desc_int *d;
- struct irq_data *data;
- struct irq_desc *desc;
- struct irq_chip *chip;
- int irq;
-
- /* get intc controller associated with this sysdev */
- d = container_of(dev, struct intc_desc_int, sysdev);
- switch (state.event) {
- case PM_EVENT_ON:
- if (d->state.event != PM_EVENT_FREEZE)
- break;
+ list_for_each_entry(d, &intc_list, list) {
+ int irq;
for_each_active_irq(irq) {
- desc = irq_to_desc(irq);
+ struct irq_data *data;
+ struct irq_desc *desc;
+ struct irq_chip *chip;
+
data = irq_get_irq_data(irq);
chip = irq_data_get_irq_chip(data);
-
/*
* This will catch the redirect and VIRQ cases
* due to the dummy_irq_chip being inserted.
*/
if (chip != &d->chip)
continue;
+ desc = irq_to_desc(irq);
if (desc->status & IRQ_DISABLED)
chip->irq_disable(data);
else
chip->irq_enable(data);
}
- break;
- case PM_EVENT_FREEZE:
- /* nothing has to be done */
- break;
- case PM_EVENT_SUSPEND:
- /* enable wakeup irqs belonging to this intc controller */
- for_each_active_irq(irq) {
- desc = irq_to_desc(irq);
- data = irq_get_irq_data(irq);
- chip = irq_data_get_irq_chip(data);
-
- if (chip != &d->chip)
- continue;
- if ((desc->status & IRQ_WAKEUP))
- chip->irq_enable(data);
- }
- break;
}
-
- d->state = state;
-
- return 0;
}
-static int intc_resume(struct sys_device *dev)
-{
- return intc_suspend(dev, PMSG_ON);
-}
+struct syscore_ops intc_syscore_ops = {
+ .suspend = intc_suspend,
+ .resume = intc_resume,
+};
struct sysdev_class intc_sysdev_class = {
.name = "intc",
- .suspend = intc_suspend,
- .resume = intc_resume,
};
-/* register this intc as sysdev to allow suspend/resume */
+static ssize_t
+show_intc_name(struct sys_device *dev, struct sysdev_attribute *attr, char *buf)
+{
+ struct intc_desc_int *d;
+
+ d = container_of(dev, struct intc_desc_int, sysdev);
+
+ return sprintf(buf, "%s\n", d->chip.name);
+}
+
+static SYSDEV_ATTR(name, S_IRUGO, show_intc_name, NULL);
+
static int __init register_intc_sysdevs(void)
{
struct intc_desc_int *d;
int error;
+ register_syscore_ops(&intc_syscore_ops);
+
error = sysdev_class_register(&intc_sysdev_class);
if (!error) {
list_for_each_entry(d, &intc_list, list) {
diff --git a/drivers/sh/intc/internals.h b/drivers/sh/intc/internals.h
index 0cf8260971d..df36a421e67 100644
--- a/drivers/sh/intc/internals.h
+++ b/drivers/sh/intc/internals.h
@@ -53,7 +53,6 @@ struct intc_desc_int {
struct list_head list;
struct sys_device sysdev;
struct radix_tree_root tree;
- pm_message_t state;
raw_spinlock_t lock;
unsigned int index;
unsigned long *reg;