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, 4 insertions, 13 deletions

diff --git a/arch/arm/mach-pxa/clock-pxa3xx.c b/arch/arm/mach-pxa/clock-pxa3xx.c
index 3f864cd0bd28..2a37a9a8f621 100644
--- a/arch/arm/mach-pxa/clock-pxa3xx.c
+++ b/arch/arm/mach-pxa/clock-pxa3xx.c
@@ -10,6 +10,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/syscore_ops.h>
 
 #include <mach/smemc.h>
 #include <mach/pxa3xx-regs.h>
@@ -182,7 +183,7 @@ const struct clkops clk_pxa3xx_pout_ops = {
 static uint32_t cken[2];
 static uint32_t accr;
 
-static int pxa3xx_clock_suspend(struct sys_device *d, pm_message_t state)
+static int pxa3xx_clock_suspend(void)
 {
         cken[0] = CKENA;
         cken[1] = CKENB;
@@ -190,28 +191,18 @@ static int pxa3xx_clock_suspend(struct sys_device *d, pm_message_t state)
         return 0;
 }
 
-static int pxa3xx_clock_resume(struct sys_device *d)
+static void pxa3xx_clock_resume(void)
 {
         ACCR = accr;
         CKENA = cken[0];
         CKENB = cken[1];
-        return 0;
 }
 #else
 #define pxa3xx_clock_suspend    NULL
 #define pxa3xx_clock_resume     NULL
 #endif
 
-struct sysdev_class pxa3xx_clock_sysclass = {
-        .name           = "pxa3xx-clock",
+struct syscore_ops pxa3xx_clock_syscore_ops = {
         .suspend        = pxa3xx_clock_suspend,
         .resume         = pxa3xx_clock_resume,
 };
-
-static int __init pxa3xx_clock_init(void)
-{
-        if (cpu_is_pxa3xx() || cpu_is_pxa95x())
-                return sysdev_class_register(&pxa3xx_clock_sysclass);
-        return 0;
-}
-postcore_initcall(pxa3xx_clock_init);