ARM / Samsung: Use struct syscore_ops for "core" power management

Replace sysdev classes and struct sys_device objects used for "core"
power management by Samsung platforms with struct syscore_ops objects
that are simpler.

This generally 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>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 17 insertions, 17 deletions

diff --git a/arch/arm/mach-s3c2416/irq.c b/arch/arm/mach-s3c2416/irq.c
index 77b38f2381c1..28ad20d42445 100644
--- a/arch/arm/mach-s3c2416/irq.c
+++ b/arch/arm/mach-s3c2416/irq.c
@@ -236,8 +236,6 @@ static int __init s3c2416_irq_add(struct sys_device *sysdev)
 
 static struct sysdev_driver s3c2416_irq_driver = {
         .add            = s3c2416_irq_add,
-        .suspend        = s3c24xx_irq_suspend,
-        .resume         = s3c24xx_irq_resume,
 };
 
 static int __init s3c2416_irq_init(void)
diff --git a/arch/arm/mach-s3c2416/pm.c b/arch/arm/mach-s3c2416/pm.c
index 4a04205b04d5..41db2b21e213 100644
--- a/arch/arm/mach-s3c2416/pm.c
+++ b/arch/arm/mach-s3c2416/pm.c
@@ -11,6 +11,7 @@
 */
 
 #include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
@@ -55,30 +56,26 @@ static int s3c2416_pm_add(struct sys_device *sysdev)
         return 0;
 }
 
-static int s3c2416_pm_suspend(struct sys_device *dev, pm_message_t state)
+static struct sysdev_driver s3c2416_pm_driver = {
+        .add            = s3c2416_pm_add,
+};
+
+static __init int s3c2416_pm_init(void)
 {
-        return 0;
+        return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_pm_driver);
 }
 
-static int s3c2416_pm_resume(struct sys_device *dev)
+arch_initcall(s3c2416_pm_init);
+
+
+static void s3c2416_pm_resume(void)
 {
         /* unset the return-from-sleep amd inform flags */
         __raw_writel(0x0, S3C2443_PWRMODE);
         __raw_writel(0x0, S3C2412_INFORM0);
         __raw_writel(0x0, S3C2412_INFORM1);
-
-        return 0;
 }
 
-static struct sysdev_driver s3c2416_pm_driver = {
-        .add            = s3c2416_pm_add,
-        .suspend        = s3c2416_pm_suspend,
+struct syscore_ops s3c2416_pm_syscore_ops = {
         .resume         = s3c2416_pm_resume,
 };
-
-static __init int s3c2416_pm_init(void)
-{
-        return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_pm_driver);
-}
-
-arch_initcall(s3c2416_pm_init);
diff --git a/arch/arm/mach-s3c2416/s3c2416.c b/arch/arm/mach-s3c2416/s3c2416.c
index ba7fd8737434..494ce913dc95 100644
--- a/arch/arm/mach-s3c2416/s3c2416.c
+++ b/arch/arm/mach-s3c2416/s3c2416.c
@@ -32,6 +32,7 @@
 #include <linux/platform_device.h>
 #include <linux/serial_core.h>
 #include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
 #include <linux/clk.h>
 #include <linux/io.h>
 
@@ -54,6 +55,7 @@
 #include <plat/devs.h>
 #include <plat/cpu.h>
 #include <plat/sdhci.h>
+#include <plat/pm.h>
 
 #include <plat/iic-core.h>
 #include <plat/fb-core.h>
@@ -95,6 +97,9 @@ int __init s3c2416_init(void)
 
         s3c_fb_setname("s3c2443-fb");
 
+        register_syscore_ops(&s3c2416_pm_syscore_ops);
+        register_syscore_ops(&s3c24xx_irq_syscore_ops);
+
         return sysdev_register(&s3c2416_sysdev);
 }