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>

1 files changed, 6 insertions, 7 deletions

diff --git a/arch/arm/mach-s3c2410/pm.c b/arch/arm/mach-s3c2410/pm.c
index 725636fc4dc3..4728f9aa7df1 100644
--- a/arch/arm/mach-s3c2410/pm.c
+++ b/arch/arm/mach-s3c2410/pm.c
@@ -25,6 +25,7 @@
 #include <linux/errno.h>
 #include <linux/time.h>
 #include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
 #include <linux/gpio.h>
 #include <linux/io.h>
 
@@ -92,7 +93,7 @@ static void s3c2410_pm_prepare(void)
         }
 }
 
-static int s3c2410_pm_resume(struct sys_device *dev)
+static void s3c2410_pm_resume(void)
 {
         unsigned long tmp;
 
@@ -104,10 +105,12 @@ static int s3c2410_pm_resume(struct sys_device *dev)
 
         if ( machine_is_aml_m5900() )
                 s3c2410_gpio_setpin(S3C2410_GPF(2), 0);
-
-        return 0;
 }
 
+struct syscore_ops s3c2410_pm_syscore_ops = {
+        .resume         = s3c2410_pm_resume,
+};
+
 static int s3c2410_pm_add(struct sys_device *dev)
 {
         pm_cpu_prep = s3c2410_pm_prepare;
@@ -119,7 +122,6 @@ static int s3c2410_pm_add(struct sys_device *dev)
 #if defined(CONFIG_CPU_S3C2410)
 static struct sysdev_driver s3c2410_pm_driver = {
         .add            = s3c2410_pm_add,
-        .resume         = s3c2410_pm_resume,
 };
 
 /* register ourselves */
@@ -133,7 +135,6 @@ arch_initcall(s3c2410_pm_drvinit);
 
 static struct sysdev_driver s3c2410a_pm_driver = {
         .add            = s3c2410_pm_add,
-        .resume         = s3c2410_pm_resume,
 };
 
 static int __init s3c2410a_pm_drvinit(void)
@@ -147,7 +148,6 @@ arch_initcall(s3c2410a_pm_drvinit);
 #if defined(CONFIG_CPU_S3C2440)
 static struct sysdev_driver s3c2440_pm_driver = {
         .add            = s3c2410_pm_add,
-        .resume         = s3c2410_pm_resume,
 };
 
 static int __init s3c2440_pm_drvinit(void)
@@ -161,7 +161,6 @@ arch_initcall(s3c2440_pm_drvinit);
 #if defined(CONFIG_CPU_S3C2442)
 static struct sysdev_driver s3c2442_pm_driver = {
         .add            = s3c2410_pm_add,
-        .resume         = s3c2410_pm_resume,
 };
 
 static int __init s3c2442_pm_drvinit(void)