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PM / PowerPC: Use struct syscore_ops instead of sysdevs for PM

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Make some PowerPC architecture's code use 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
2011-04-26 19:14:57 +02:00
parent f98bf4aa39
commit f5a592f7d7
5 changed files with 65 additions and 94 deletions
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36
arch/powerpc/sysdev/ipic.c
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@ -18,7 +18,7 @@
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/sysdev.h>
#include <linux/syscore_ops.h>
#include <linux/device.h>
#include <linux/bootmem.h>
#include <linux/spinlock.h>
@ -902,7 +902,7 @@ static struct {
u32 sercr;
} ipic_saved_state;
static int ipic_suspend(struct sys_device *sdev, pm_message_t state)
static int ipic_suspend(void)
{
struct ipic *ipic = primary_ipic;
@ -933,7 +933,7 @@ static int ipic_suspend(struct sys_device *sdev, pm_message_t state)
return 0;
}
static int ipic_resume(struct sys_device *sdev)
static void ipic_resume(void)
{
struct ipic *ipic = primary_ipic;
@ -949,44 +949,26 @@ static int ipic_resume(struct sys_device *sdev)
ipic_write(ipic->regs, IPIC_SECNR, ipic_saved_state.secnr);
ipic_write(ipic->regs, IPIC_SERMR, ipic_saved_state.sermr);
ipic_write(ipic->regs, IPIC_SERCR, ipic_saved_state.sercr);
return 0;
}
#else
#define ipic_suspend NULL
#define ipic_resume NULL
#endif
static struct sysdev_class ipic_sysclass = {
.name = "ipic",
static struct syscore_ops ipic_syscore_ops = {
.suspend = ipic_suspend,
.resume = ipic_resume,
};
static struct sys_device device_ipic = {
.id = 0,
.cls = &ipic_sysclass,
};
static int __init init_ipic_sysfs(void)
static int __init init_ipic_syscore(void)
{
int rc;
if (!primary_ipic || !primary_ipic->regs)
return -ENODEV;
printk(KERN_DEBUG "Registering ipic with sysfs...\n");
rc = sysdev_class_register(&ipic_sysclass);
if (rc) {
printk(KERN_ERR "Failed registering ipic sys class\n");
return -ENODEV;
}
rc = sysdev_register(&device_ipic);
if (rc) {
printk(KERN_ERR "Failed registering ipic sys device\n");
return -ENODEV;
}
printk(KERN_DEBUG "Registering ipic system core operations\n");
register_syscore_ops(&ipic_syscore_ops);
return 0;
}
subsys_initcall(init_ipic_sysfs);
subsys_initcall(init_ipic_syscore);