1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle-calxeda.c b/drivers/cpuidle/cpuidle-calxeda.c
new file mode 100644
index 0000000000..b17d9a8418
--- /dev/null
+++ b/drivers/cpuidle/cpuidle-calxeda.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2012 Calxeda, Inc.
+ *
+ * Based on arch/arm/plat-mxc/cpuidle.c: #v3.7
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 Linaro Ltd.
+ *
+ * Maintainer: Rob Herring <rob.herring@calxeda.com>
+ */
+
+#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/psci.h>
+
+#include <asm/cpuidle.h>
+#include <asm/suspend.h>
+
+#include <uapi/linux/psci.h>
+
+#define CALXEDA_IDLE_PARAM \
+	((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
+	 (0 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
+	 (PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
+
+static int calxeda_idle_finish(unsigned long val)
+{
+	return psci_ops.cpu_suspend(CALXEDA_IDLE_PARAM, __pa(cpu_resume));
+}
+
+static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
+				struct cpuidle_driver *drv,
+				int index)
+{
+	cpu_pm_enter();
+	cpu_suspend(0, calxeda_idle_finish);
+	cpu_pm_exit();
+
+	return index;
+}
+
+static struct cpuidle_driver calxeda_idle_driver = {
+	.name = "calxeda_idle",
+	.states = {
+		ARM_CPUIDLE_WFI_STATE,
+		{
+			.name = "PG",
+			.desc = "Power Gate",
+			.exit_latency = 30,
+			.power_usage = 50,
+			.target_residency = 200,
+			.enter = calxeda_pwrdown_idle,
+		},
+	},
+	.state_count = 2,
+};
+
+static int calxeda_cpuidle_probe(struct platform_device *pdev)
+{
+	return cpuidle_register(&calxeda_idle_driver, NULL);
+}
+
+static struct platform_driver calxeda_cpuidle_plat_driver = {
+        .driver = {
+                .name = "cpuidle-calxeda",
+        },
+        .probe = calxeda_cpuidle_probe,
+};
+builtin_platform_driver(calxeda_cpuidle_plat_driver);