1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle-qcom.c b/drivers/cpuidle/cpuidle-qcom.c
new file mode 100644
index 0000000000000..4eb31f1ea68da
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-qcom.c
@@ -0,0 +1,85 @@
+/*
+ * 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/cpu_pm.h>
+#include <linux/cpuidle.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <soc/qcom/pm.h>
+#include "dt_idle_states.h"
+
+static void (*qcom_idle_enter)(enum pm_sleep_mode);
+
+static int qcom_lpm_enter_wfi(struct cpuidle_device *dev,
+				struct cpuidle_driver *drv, int index)
+{
+	qcom_idle_enter(PM_SLEEP_MODE_WFI);
+
+	return index;
+}
+
+static int qcom_lpm_enter_spc(struct cpuidle_device *dev,
+				struct cpuidle_driver *drv, int index)
+{
+	cpu_pm_enter();
+	qcom_idle_enter(PM_SLEEP_MODE_SPC);
+	cpu_pm_exit();
+
+	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-wfi", .data = qcom_lpm_enter_wfi },
+	{ .compatible = "qcom,idle-state-spc", .data = qcom_lpm_enter_spc },
+	{ },
+};
+
+static int qcom_cpuidle_probe(struct platform_device *pdev)
+{
+	struct cpuidle_driver *drv = &qcom_cpuidle_driver;
+	int ret;
+
+	qcom_idle_enter = pdev->dev.platform_data;
+	if (!qcom_idle_enter)
+		return -EFAULT;
+
+	 /* Probe for other states including platform WFI */
+	ret = dt_init_idle_driver(drv, qcom_idle_state_match, 0);
+	if (ret <= 0) {
+		pr_err("%s: No cpuidle state found.\n", __func__);
+		return ret;
+	}
+
+	ret = cpuidle_register(drv, NULL);
+	if (ret) {
+		pr_err("%s: failed to register cpuidle driver\n", __func__);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct platform_driver qcom_cpuidle_plat_driver = {
+	.probe	= qcom_cpuidle_probe,
+	.driver = {
+		.name = "qcom_cpuidle",
+	},
+};
+
+module_platform_driver(qcom_cpuidle_plat_driver);