1 files changed, 38 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-imx/pm-imx3.c b/kernel/arch/arm/mach-imx/pm-imx3.c
new file mode 100644
index 000000000..6a07006ff
--- /dev/null
+++ b/kernel/arch/arm/mach-imx/pm-imx3.c
@@ -0,0 +1,38 @@
+/*
+ *  Copyright (C) 2012 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/io.h>
+
+#include "common.h"
+#include "crmregs-imx3.h"
+#include "devices/devices-common.h"
+#include "hardware.h"
+
+/*
+ * Set cpu low power mode before WFI instruction. This function is called
+ * mx3 because it can be used for mx31 and mx35.
+ * Currently only WAIT_MODE is supported.
+ */
+void mx3_cpu_lp_set(enum mx3_cpu_pwr_mode mode)
+{
+	int reg = __raw_readl(mx3_ccm_base + MXC_CCM_CCMR);
+	reg &= ~MXC_CCM_CCMR_LPM_MASK;
+
+	switch (mode) {
+	case MX3_WAIT:
+		if (cpu_is_mx35())
+			reg |= MXC_CCM_CCMR_LPM_WAIT_MX35;
+		__raw_writel(reg, mx3_ccm_base + MXC_CCM_CCMR);
+		break;
+	default:
+		pr_err("Unknown cpu power mode: %d\n", mode);
+		return;
+	}
+}