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

Replace sysdev classes and struct sys_device objects used for "core"
power management by the PXA platform code with struct syscore_ops
objects that are simpler.

This 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>

1 files changed, 5 insertions, 16 deletions

diff --git a/arch/arm/mach-pxa/mfp-pxa3xx.c b/arch/arm/mach-pxa/mfp-pxa3xx.c
index 7a270eecd480..89863a01ecd7 100644
--- a/arch/arm/mach-pxa/mfp-pxa3xx.c
+++ b/arch/arm/mach-pxa/mfp-pxa3xx.c
@@ -17,7 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
 
 #include <mach/hardware.h>
 #include <mach/mfp-pxa3xx.h>
@@ -31,13 +31,13 @@
  * a pull-down mode if they're an active low chip select, and we're
  * just entering standby.
  */
-static int pxa3xx_mfp_suspend(struct sys_device *d, pm_message_t state)
+static int pxa3xx_mfp_suspend(void)
 {
         mfp_config_lpm();
         return 0;
 }
 
-static int pxa3xx_mfp_resume(struct sys_device *d)
+static void pxa3xx_mfp_resume(void)
 {
         mfp_config_run();
 
@@ -47,24 +47,13 @@ static int pxa3xx_mfp_resume(struct sys_device *d)
          * preserve them here in case they will be referenced later
          */
         ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
-        return 0;
 }
 #else
 #define pxa3xx_mfp_suspend      NULL
 #define pxa3xx_mfp_resume       NULL
 #endif
 
-struct sysdev_class pxa3xx_mfp_sysclass = {
-        .name           = "mfp",
+struct syscore_ops pxa3xx_mfp_syscore_ops = {
         .suspend        = pxa3xx_mfp_suspend,
-        .resume         = pxa3xx_mfp_resume,
+        .resume         = pxa3xx_mfp_resume,
 };
-
-static int __init mfp_init_devicefs(void)
-{
-        if (cpu_is_pxa3xx())
-                return sysdev_class_register(&pxa3xx_mfp_sysclass);
-
-        return 0;
-}
-postcore_initcall(mfp_init_devicefs);