zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-pxa/pm.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-pxa/pm.c
new file mode 100644
index 0000000..37178a8
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-pxa/pm.c
@@ -0,0 +1,118 @@
+/*
+ * PXA250/210 Power Management Routines
+ *
+ * Original code for the SA11x0:
+ * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com>
+ *
+ * Modified for the PXA250 by Nicolas Pitre:
+ * Copyright (c) 2002 Monta Vista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/suspend.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+
+#include <mach/pm.h>
+
+struct pxa_cpu_pm_fns *pxa_cpu_pm_fns;
+static unsigned long *sleep_save;
+
+int pxa_pm_enter(suspend_state_t state)
+{
+ unsigned long sleep_save_checksum = 0, checksum = 0;
+ int i;
+
+#ifdef CONFIG_IWMMXT
+ /* force any iWMMXt context to ram **/
+ if (elf_hwcap & HWCAP_IWMMXT)
+ iwmmxt_task_disable(NULL);
+#endif
+
+ /* skip registers saving for standby */
+ if (state != PM_SUSPEND_STANDBY && pxa_cpu_pm_fns->save) {
+ pxa_cpu_pm_fns->save(sleep_save);
+ /* before sleeping, calculate and save a checksum */
+ for (i = 0; i < pxa_cpu_pm_fns->save_count - 1; i++)
+ sleep_save_checksum += sleep_save[i];
+ }
+
+ /* *** go zzz *** */
+ pxa_cpu_pm_fns->enter(state);
+
+ if (state != PM_SUSPEND_STANDBY && pxa_cpu_pm_fns->restore) {
+ /* after sleeping, validate the checksum */
+ for (i = 0; i < pxa_cpu_pm_fns->save_count - 1; i++)
+ checksum += sleep_save[i];
+
+ /* if invalid, display message and wait for a hardware reset */
+ if (checksum != sleep_save_checksum) {
+
+ lubbock_set_hexled(0xbadbadc5);
+
+ while (1)
+ pxa_cpu_pm_fns->enter(state);
+ }
+ pxa_cpu_pm_fns->restore(sleep_save);
+ }
+
+ pr_debug("*** made it back from resume\n");
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(pxa_pm_enter);
+
+static int pxa_pm_valid(suspend_state_t state)
+{
+ if (pxa_cpu_pm_fns)
+ return pxa_cpu_pm_fns->valid(state);
+
+ return -EINVAL;
+}
+
+int pxa_pm_prepare(void)
+{
+ int ret = 0;
+
+ if (pxa_cpu_pm_fns && pxa_cpu_pm_fns->prepare)
+ ret = pxa_cpu_pm_fns->prepare();
+
+ return ret;
+}
+
+void pxa_pm_finish(void)
+{
+ if (pxa_cpu_pm_fns && pxa_cpu_pm_fns->finish)
+ pxa_cpu_pm_fns->finish();
+}
+
+static const struct platform_suspend_ops pxa_pm_ops = {
+ .valid = pxa_pm_valid,
+ .enter = pxa_pm_enter,
+ .prepare = pxa_pm_prepare,
+ .finish = pxa_pm_finish,
+};
+
+static int __init pxa_pm_init(void)
+{
+ if (!pxa_cpu_pm_fns) {
+ printk(KERN_ERR "no valid pxa_cpu_pm_fns defined\n");
+ return -EINVAL;
+ }
+
+ sleep_save = kmalloc(pxa_cpu_pm_fns->save_count * sizeof(unsigned long),
+ GFP_KERNEL);
+ if (!sleep_save) {
+ printk(KERN_ERR "failed to alloc memory for pm save\n");
+ return -ENOMEM;
+ }
+
+ suspend_set_ops(&pxa_pm_ops);
+ return 0;
+}
+
+device_initcall(pxa_pm_init);