1 files changed, 87 insertions, 0 deletions
diff --git a/arch/arm/mach-mx35/pm.c b/arch/arm/mach-mx35/pm.c
new file mode 100644
index 000000000000..1be097d371f3
--- /dev/null
+++ b/arch/arm/mach-mx35/pm.c
@@ -0,0 +1,87 @@
+/*
+ *  Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/kernel.h>
+#include <linux/suspend.h>
+#include <mach/hardware.h>
+
+/*!
+ * @defgroup MSL_MX35 i.MX35 Machine Specific Layer (MSL)
+ */
+
+int suspend_ops_started;
+int is_suspend_ops_started(void)
+{
+	return suspend_ops_started;
+}
+/*!
+ * @file mach-mx35/pm.c
+ * @brief This file contains suspend operations
+ *
+ * @ingroup MSL_MX35
+ */
+static int mx35_suspend_enter(suspend_state_t state)
+{
+	switch (state) {
+	case PM_SUSPEND_MEM:
+		mxc_cpu_lp_set(STOP_POWER_OFF);
+		break;
+	case PM_SUSPEND_STANDBY:
+		mxc_cpu_lp_set(STOP_POWER_ON);
+		break;
+	default:
+		return -EINVAL;
+	}
+	/* Executing CP15 (Wait-for-Interrupt) Instruction */
+	cpu_do_idle();
+	return 0;
+}
+
+/*
+ * Called after processes are frozen, but before we shut down devices.
+ */
+static int mx35_suspend_prepare(void)
+{
+	suspend_ops_started = 1;
+	return 0;
+}
+
+/*
+ * Called after devices are re-setup, but before processes are thawed.
+ */
+static void mx35_suspend_finish(void)
+{
+	suspend_ops_started = 0;
+}
+
+static int mx35_pm_valid(suspend_state_t state)
+{
+	return (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX);
+}
+
+struct platform_suspend_ops mx35_suspend_ops = {
+	.valid = mx35_pm_valid,
+	.prepare = mx35_suspend_prepare,
+	.enter = mx35_suspend_enter,
+	.finish = mx35_suspend_finish,
+};
+
+static int __init mx35_pm_init(void)
+{
+	pr_info("Static Power Management for Freescale i.MX35\n");
+	suspend_set_ops(&mx35_suspend_ops);
+
+	return 0;
+}
+
+late_initcall(mx35_pm_init);