1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 7e863afefb53..893964fb9659 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -120,6 +120,42 @@ EXPORT_SYMBOL(get_clk_frequency_khz);
 EXPORT_SYMBOL(get_memclk_frequency_10khz);
 EXPORT_SYMBOL(get_lcdclk_frequency_10khz);
 
+#ifdef CONFIG_PM
+
+int pxa_cpu_pm_prepare(suspend_state_t state)
+{
+        switch (state) {
+        case PM_SUSPEND_MEM:
+                return 0;
+        default:
+                return -EINVAL;
+        }
+}
+
+void pxa_cpu_pm_enter(suspend_state_t state)
+{
+        extern void pxa_cpu_standby(void);
+        extern void pxa_cpu_suspend(unsigned int);
+        extern void pxa_cpu_resume(void);
+
+        CKEN = CKEN22_MEMC | CKEN9_OSTIMER;
+
+        /* ensure voltage-change sequencer not initiated, which hangs */
+        PCFR &= ~PCFR_FVC;
+
+        /* Clear edge-detect status register. */
+        PEDR = 0xDF12FE1B;
+
+        switch (state) {
+        case PM_SUSPEND_MEM:
+                /* set resume return address */
+                PSPR = virt_to_phys(pxa_cpu_resume);
+                pxa_cpu_suspend(3);
+                break;
+        }
+}
+
+#endif
 
 /*
  * device registration specific to PXA27x.