ARM / PXA: Use struct syscore_ops for "core" power management
Replace sysdev classes and struct sys_device objects used for "core"
power management by the PXA platform code with struct syscore_ops
objects that are simpler.
This reduces the code size and the kernel memory footprint. It also
is necessary for removing sysdevs entirely from the kernel in the
future.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/arch/arm/mach-pxa/mioa701.c b/arch/arm/mach-pxa/mioa701.c
index 23925db..e347013 100644
--- a/arch/arm/mach-pxa/mioa701.c
+++ b/arch/arm/mach-pxa/mioa701.c
@@ -22,7 +22,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/gpio_keys.h>
@@ -488,7 +488,7 @@
}
-static int mioa701_sys_suspend(struct sys_device *sysdev, pm_message_t state)
+static int mioa701_sys_suspend(void)
{
int i = 0, is_bt_on;
u32 *mem_resume_vector = phys_to_virt(RESUME_VECTOR_ADDR);
@@ -514,7 +514,7 @@
return 0;
}
-static int mioa701_sys_resume(struct sys_device *sysdev)
+static void mioa701_sys_resume(void)
{
int i = 0;
u32 *mem_resume_vector = phys_to_virt(RESUME_VECTOR_ADDR);
@@ -527,43 +527,18 @@
*mem_resume_enabler = save_buffer[i++];
*mem_resume_bt = save_buffer[i++];
*mem_resume_unknown = save_buffer[i++];
-
- return 0;
}
-static struct sysdev_class mioa701_sysclass = {
- .name = "mioa701",
-};
-
-static struct sys_device sysdev_bootstrap = {
- .cls = &mioa701_sysclass,
-};
-
-static struct sysdev_driver driver_bootstrap = {
- .suspend = &mioa701_sys_suspend,
- .resume = &mioa701_sys_resume,
+static struct syscore_ops mioa701_syscore_ops = {
+ .suspend = mioa701_sys_suspend,
+ .resume = mioa701_sys_resume,
};
static int __init bootstrap_init(void)
{
- int rc;
int save_size = mioa701_bootstrap_lg + (sizeof(u32) * 3);
- rc = sysdev_class_register(&mioa701_sysclass);
- if (rc) {
- printk(KERN_ERR "Failed registering mioa701 sys class\n");
- return -ENODEV;
- }
- rc = sysdev_register(&sysdev_bootstrap);
- if (rc) {
- printk(KERN_ERR "Failed registering mioa701 sys device\n");
- return -ENODEV;
- }
- rc = sysdev_driver_register(&mioa701_sysclass, &driver_bootstrap);
- if (rc) {
- printk(KERN_ERR "Failed registering PMU sys driver\n");
- return -ENODEV;
- }
+ register_syscore_ops(&mioa701_syscore_ops);
save_buffer = kmalloc(save_size, GFP_KERNEL);
if (!save_buffer)
@@ -576,9 +551,7 @@
static void bootstrap_exit(void)
{
kfree(save_buffer);
- sysdev_driver_unregister(&mioa701_sysclass, &driver_bootstrap);
- sysdev_unregister(&sysdev_bootstrap);
- sysdev_class_unregister(&mioa701_sysclass);
+ unregister_syscore_ops(&mioa701_syscore_ops);
printk(KERN_CRIT "Unregistering mioa701 suspend will hang next"
"resume !!!\n");