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, 5 insertions, 12 deletions

diff --git a/arch/arm/mach-s3c2410/mach-bast.c b/arch/arm/mach-s3c2410/mach-bast.c
index 2970ea9f7c2b..1e2d536adda9 100644
--- a/arch/arm/mach-s3c2410/mach-bast.c
+++ b/arch/arm/mach-s3c2410/mach-bast.c
@@ -17,7 +17,7 @@
 #include <linux/timer.h>
 #include <linux/init.h>
 #include <linux/gpio.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/dm9000.h>
@@ -214,17 +214,16 @@ static struct s3c2410_uartcfg bast_uartcfgs[] __initdata = {
 /* NAND Flash on BAST board */
 
 #ifdef CONFIG_PM
-static int bast_pm_suspend(struct sys_device *sd, pm_message_t state)
+static int bast_pm_suspend(void)
 {
         /* ensure that an nRESET is not generated on resume. */
         gpio_direction_output(S3C2410_GPA(21), 1);
         return 0;
 }
 
-static int bast_pm_resume(struct sys_device *sd)
+static void bast_pm_resume(void)
 {
         s3c_gpio_cfgpin(S3C2410_GPA(21), S3C2410_GPA21_nRSTOUT);
-        return 0;
 }
 
 #else
@@ -232,16 +231,11 @@ static int bast_pm_resume(struct sys_device *sd)
 #define bast_pm_resume NULL
 #endif
 
-static struct sysdev_class bast_pm_sysclass = {
-        .name           = "mach-bast",
+static struct syscore_ops bast_pm_syscore_ops = {
         .suspend        = bast_pm_suspend,
         .resume         = bast_pm_resume,
 };
 
-static struct sys_device bast_pm_sysdev = {
-        .cls            = &bast_pm_sysclass,
-};
-
 static int smartmedia_map[] = { 0 };
 static int chip0_map[] = { 1 };
 static int chip1_map[] = { 2 };
@@ -642,8 +636,7 @@ static void __init bast_map_io(void)
 
 static void __init bast_init(void)
 {
-        sysdev_class_register(&bast_pm_sysclass);
-        sysdev_register(&bast_pm_sysdev);
+        register_syscore_ops(&bast_pm_syscore_ops);
 
         s3c_i2c0_set_platdata(&bast_i2c_info);
         s3c_nand_set_platdata(&bast_nand_info);