1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle-qcom.c b/drivers/cpuidle/cpuidle-qcom.c
new file mode 100644
index 000000000000..aa6a6c9a3590
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-qcom.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2014, Linaro Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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/cpuidle.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <soc/qcom/pm.h>
+#include "dt_idle_states.h"
+
+static struct qcom_cpu_pm_ops *lpm_ops;
+
+static int qcom_cpu_stby(struct cpuidle_device *dev,
+				struct cpuidle_driver *drv, int index)
+{
+	int ret;
+
+	ret = lpm_ops->standby(NULL);
+	if (ret)
+		return ret;
+
+	return index;
+}
+
+static int qcom_cpu_spc(struct cpuidle_device *dev,
+				struct cpuidle_driver *drv, int index)
+{
+	int ret;
+
+	ret = lpm_ops->spc(NULL);
+	if (ret)
+		return ret;
+
+	return index;
+}
+
+static struct cpuidle_driver qcom_cpuidle_driver = {
+	.name = "qcom_cpuidle",
+};
+
+static const struct of_device_id qcom_idle_state_match[] = {
+	{ .compatible = "qcom,idle-state-stby", .data = qcom_cpu_stby },
+	{ .compatible = "qcom,idle-state-spc", .data = qcom_cpu_spc },
+	{ },
+};
+
+static int qcom_cpuidle_probe(struct platform_device *pdev)
+{
+	struct cpuidle_driver *drv = &qcom_cpuidle_driver;
+	int ret;
+
+	lpm_ops = pdev->dev.platform_data;
+
+	/* Probe for other states, including standby */
+	ret = dt_init_idle_driver(drv, qcom_idle_state_match, 0);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * We will not register for cpu's cpuidle device here,
+	 * they will be registered as and when their power controllers
+	 * are ready.
+	 */
+	return cpuidle_register_driver(drv);
+}
+
+static struct platform_driver qcom_cpuidle = {
+	.probe	= qcom_cpuidle_probe,
+	.driver = {
+		.name = "qcom_cpuidle",
+	},
+};
+
+/*
+ * Register the driver early so the we have a successul registration
+ * when the device shows up.
+ * This way the cpuidle driver could be registered before the cpuidle
+ * devices are registered.
+ */
+static int __init qcom_cpuidle_driver_init(void)
+{
+	return platform_driver_register(&qcom_cpuidle);
+}
+core_initcall(qcom_cpuidle_driver_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("CPUIDLE driver for QCOM SoC");
+MODULE_ALIAS("platform:qcom-cpuidle");