This patch adds suspend to idle support for Qualcomm processors.  While
suspend to memory will be a valid state, there won't be any special
handling or power savings over the suspend to idle.

Signed-off-by: Andy Gross <redacted>
---
 drivers/soc/qcom/Makefile  |  1 +
 drivers/soc/qcom/suspend.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 drivers/soc/qcom/suspend.c

diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index fdd664e..7c479d3 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile

@@ -7,3 +7,4 @@ obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
 obj-$(CONFIG_QCOM_SMP2P)       += smp2p.o
 obj-$(CONFIG_QCOM_SMSM)        += smsm.o
 obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
+obj-$(CONFIG_SUSPEND)  +=      suspend.o

diff --git a/drivers/soc/qcom/suspend.c b/drivers/soc/qcom/suspend.c
new file mode 100644
index 0000000..7d3f2dd
--- /dev/null
+++ b/drivers/soc/qcom/suspend.c

@@ -0,0 +1,77 @@
+/*
+ * (C) Copyright 2016 Linaro Ltd.
+ *
+ * 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; version 2
+ * of the License.
+ */
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/cpuidle.h>
+#include <linux/suspend.h>
+
+
+static void qcom_pm_enter_freeze(struct cpuidle_device *dev,
+       struct cpuidle_driver *drv,
+       int index)
+{
+       drv->states[index].enter(dev, drv, index);
+}
+
+static const struct of_device_id qcom_idle_state_match[] = {
+       { .compatible = "qcom,idle-state-spc", },
+       { },
+};
+
+static const struct platform_suspend_ops qcom_suspend_ops = {
+       .valid          = suspend_valid_only_mem,
+};
+
+static int __init qcom_pm_init(void)
+{
+       struct cpuidle_device *cpu_dev;
+       struct cpuidle_driver *cpu_drv;
+       int state_count;
+       struct device_node *state_np, *cpu_np;
+       const struct of_device_id *match;
+       int i;
+
+       /* configure CPU enter_freeze if applicable */
+       for_each_present_cpu(i) {
+               cpu_np = of_get_cpu_node(i, NULL);
+               cpu_dev = per_cpu_ptr(cpuidle_devices, i);
+               cpu_drv = cpuidle_get_cpu_driver(cpu_dev);
+
+               if (!cpu_dev || !cpu_drv) {
+                       of_node_put(cpu_np);
+                       return -EPROBE_DEFER;