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, 6 insertions, 19 deletions

diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index a4af8c52d7ee..fed363cec9c6 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -21,7 +21,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/suspend.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
 #include <linux/irq.h>
 
 #include <asm/mach/map.h>
@@ -350,21 +350,9 @@ static struct platform_device *pxa25x_devices[] __initdata = {
         &pxa_device_asoc_platform,
 };
 
-static struct sys_device pxa25x_sysdev[] = {
-        {
-                .cls    = &pxa_irq_sysclass,
-        }, {
-                .cls    = &pxa2xx_mfp_sysclass,
-        }, {
-                .cls    = &pxa_gpio_sysclass,
-        }, {
-                .cls    = &pxa2xx_clock_sysclass,
-        }
-};
-
 static int __init pxa25x_init(void)
 {
-        int i, ret = 0;
+        int ret = 0;
 
         if (cpu_is_pxa25x()) {
 
@@ -377,11 +365,10 @@ static int __init pxa25x_init(void)
 
                 pxa25x_init_pm();
 
-                for (i = 0; i < ARRAY_SIZE(pxa25x_sysdev); i++) {
-                        ret = sysdev_register(&pxa25x_sysdev[i]);
-                        if (ret)
-                                pr_err("failed to register sysdev[%d]\n", i);
-                }
+                register_syscore_ops(&pxa_irq_syscore_ops);
+                register_syscore_ops(&pxa2xx_mfp_syscore_ops);
+                register_syscore_ops(&pxa_gpio_syscore_ops);
+                register_syscore_ops(&pxa2xx_clock_syscore_ops);
 
                 ret = platform_add_devices(pxa25x_devices,
                                            ARRAY_SIZE(pxa25x_devices));