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-rw-r--r--arch/arm/mach-pxa/pxa27x.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 7e863afefb5..893964fb965 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.