ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/arm/mach-tegra/cpuidle-tegra30.c b/marvell/linux/arch/arm/mach-tegra/cpuidle-tegra30.c
new file mode 100644
index 0000000..c612852
--- /dev/null
+++ b/marvell/linux/arch/arm/mach-tegra/cpuidle-tegra30.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * CPU idle driver for Tegra CPUs
+ *
+ * Copyright (c) 2010-2012, NVIDIA Corporation.
+ * Copyright (c) 2011 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ * Gary King <gking@nvidia.com>
+ *
+ * Rework for 3.3 by Peter De Schrijver <pdeschrijver@nvidia.com>
+ */
+
+#include <linux/clk/tegra.h>
+#include <linux/tick.h>
+#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <asm/cpuidle.h>
+#include <asm/smp_plat.h>
+#include <asm/suspend.h>
+
+#include "cpuidle.h"
+#include "pm.h"
+#include "sleep.h"
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra30_idle_lp2(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index);
+#endif
+
+static struct cpuidle_driver tegra_idle_driver = {
+ .name = "tegra_idle",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM_SLEEP
+ .state_count = 2,
+#else
+ .state_count = 1,
+#endif
+ .states = {
+ [0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
+#ifdef CONFIG_PM_SLEEP
+ [1] = {
+ .enter = tegra30_idle_lp2,
+ .exit_latency = 2000,
+ .target_residency = 2200,
+ .power_usage = 0,
+ .flags = CPUIDLE_FLAG_TIMER_STOP,
+ .name = "powered-down",
+ .desc = "CPU power gated",
+ },
+#endif
+ },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static bool tegra30_cpu_cluster_power_down(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ /* All CPUs entering LP2 is not working.
+ * Don't let CPU0 enter LP2 when any secondary CPU is online.
+ */
+ if (num_online_cpus() > 1 || !tegra_cpu_rail_off_ready()) {
+ cpu_do_idle();
+ return false;
+ }
+
+ tegra_idle_lp2_last();
+
+ return true;
+}
+
+#ifdef CONFIG_SMP
+static bool tegra30_cpu_core_power_down(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ smp_wmb();
+
+ cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
+
+ return true;
+}
+#else
+static inline bool tegra30_cpu_core_power_down(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ return true;
+}
+#endif
+
+static int tegra30_idle_lp2(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ bool entered_lp2 = false;
+ bool last_cpu;
+
+ local_fiq_disable();
+
+ last_cpu = tegra_set_cpu_in_lp2();
+ cpu_pm_enter();
+
+ if (dev->cpu == 0) {
+ if (last_cpu)
+ entered_lp2 = tegra30_cpu_cluster_power_down(dev, drv,
+ index);
+ else
+ cpu_do_idle();
+ } else {
+ entered_lp2 = tegra30_cpu_core_power_down(dev, drv, index);
+ }
+
+ cpu_pm_exit();
+ tegra_clear_cpu_in_lp2();
+
+ local_fiq_enable();
+
+ smp_rmb();
+
+ return (entered_lp2) ? index : 0;
+}
+#endif
+
+int __init tegra30_cpuidle_init(void)
+{
+ return cpuidle_register(&tegra_idle_driver, NULL);
+}