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authorShawn Guo <shawn.guo@freescale.com>2011-01-24 10:05:25 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2011-01-26 08:30:49 +0100
commit376e9c5848abef8c72c09bd89f2f7ee128caa104 (patch)
tree798edecd5154f2eadbeddd798f49b379ab108c90 /arch
parentARM MXS: Add auart platform support for i.MX28 (diff)
downloadlinux-376e9c5848abef8c72c09bd89f2f7ee128caa104.tar.xz
linux-376e9c5848abef8c72c09bd89f2f7ee128caa104.zip
ARM: mxs: add initial pm support
This is a very initial pm support and basically does nothing. With this pm support entry, drivers can start testing their own pm functions. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-mxs/Makefile1
-rw-r--r--arch/arm/mach-mxs/pm.c43
2 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
index df501a8340f2..6b26f02e72a2 100644
--- a/arch/arm/mach-mxs/Makefile
+++ b/arch/arm/mach-mxs/Makefile
@@ -2,6 +2,7 @@
obj-y := clock.o devices.o gpio.o icoll.o iomux.o system.o timer.o
obj-$(CONFIG_MXS_OCOTP) += ocotp.o
+obj-$(CONFIG_PM) += pm.o
obj-$(CONFIG_SOC_IMX23) += clock-mx23.o mm-mx23.o
obj-$(CONFIG_SOC_IMX28) += clock-mx28.o mm-mx28.o
diff --git a/arch/arm/mach-mxs/pm.c b/arch/arm/mach-mxs/pm.c
new file mode 100644
index 000000000000..fb042da29bda
--- /dev/null
+++ b/arch/arm/mach-mxs/pm.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/suspend.h>
+#include <linux/io.h>
+#include <mach/system.h>
+
+static int mxs_suspend_enter(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_MEM:
+ arch_idle();
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static struct platform_suspend_ops mxs_suspend_ops = {
+ .enter = mxs_suspend_enter,
+ .valid = suspend_valid_only_mem,
+};
+
+static int __init mxs_pm_init(void)
+{
+ suspend_set_ops(&mxs_suspend_ops);
+ return 0;
+}
+device_initcall(mxs_pm_init);