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ARM: Use struct syscore_ops instead of sysdevs for PM in common code

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Convert some ARM architecture's common code to using
struct syscore_ops objects for power management instead of sysdev
classes and sysdevs.

This simplifies the code and reduces the kernel's memory footprint.
It also is necessary for removing sysdevs from the kernel entirely in
the future.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Rafael J. Wysocki
2011-04-22 22:02:33 +02:00
parent 5dd12af05c
commit 328f5cc302
5 changed files with 68 additions and 104 deletions
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19
arch/arm/vfp/vfpmodule.c
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@@ -398,9 +398,9 @@ static void vfp_enable(void *unused)
}
#ifdef CONFIG_PM
#include <linux/sysdev.h>
#include <linux/syscore_ops.h>
static int vfp_pm_suspend(struct sys_device *dev, pm_message_t state)
static int vfp_pm_suspend(void)
{
struct thread_info *ti = current_thread_info();
u32 fpexc = fmrx(FPEXC);
@@ -420,34 +420,25 @@ static int vfp_pm_suspend(struct sys_device *dev, pm_message_t state)
return 0;
}
static int vfp_pm_resume(struct sys_device *dev)
static void vfp_pm_resume(void)
{
/* ensure we have access to the vfp */
vfp_enable(NULL);
/* and disable it to ensure the next usage restores the state */
fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
return 0;
}
static struct sysdev_class vfp_pm_sysclass = {
.name = "vfp",
static struct syscore_ops vfp_pm_syscore_ops = {
.suspend = vfp_pm_suspend,
.resume = vfp_pm_resume,
};
static struct sys_device vfp_pm_sysdev = {
.cls = &vfp_pm_sysclass,
};
static void vfp_pm_init(void)
{
sysdev_class_register(&vfp_pm_sysclass);
sysdev_register(&vfp_pm_sysdev);
register_syscore_ops(&vfp_pm_syscore_ops);
}
#else
static inline void vfp_pm_init(void) { }
#endif /* CONFIG_PM */