[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/cpuidle/cpuidle-exynos.c b/src/kernel/linux/v4.14/drivers/cpuidle/cpuidle-exynos.c
new file mode 100644
index 0000000..00cd129
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/cpuidle/cpuidle-exynos.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Coupled cpuidle support based on the work of:
+ * Colin Cross <ccross@android.com>
+ * Daniel Lezcano <daniel.lezcano@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/platform_data/cpuidle-exynos.h>
+
+#include <asm/suspend.h>
+#include <asm/cpuidle.h>
+
+static atomic_t exynos_idle_barrier;
+
+static struct cpuidle_exynos_data *exynos_cpuidle_pdata;
+static void (*exynos_enter_aftr)(void);
+
+static int exynos_enter_coupled_lowpower(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ int ret;
+
+ exynos_cpuidle_pdata->pre_enter_aftr();
+
+ /*
+ * Waiting all cpus to reach this point at the same moment
+ */
+ cpuidle_coupled_parallel_barrier(dev, &exynos_idle_barrier);
+
+ /*
+ * Both cpus will reach this point at the same time
+ */
+ ret = dev->cpu ? exynos_cpuidle_pdata->cpu1_powerdown()
+ : exynos_cpuidle_pdata->cpu0_enter_aftr();
+ if (ret)
+ index = ret;
+
+ /*
+ * Waiting all cpus to finish the power sequence before going further
+ */
+ cpuidle_coupled_parallel_barrier(dev, &exynos_idle_barrier);
+
+ exynos_cpuidle_pdata->post_enter_aftr();
+
+ return index;
+}
+
+static int exynos_enter_lowpower(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ int new_index = index;
+
+ /* AFTR can only be entered when cores other than CPU0 are offline */
+ if (num_online_cpus() > 1 || dev->cpu != 0)
+ new_index = drv->safe_state_index;
+
+ if (new_index == 0)
+ return arm_cpuidle_simple_enter(dev, drv, new_index);
+
+ exynos_enter_aftr();
+
+ return new_index;
+}
+
+static struct cpuidle_driver exynos_idle_driver = {
+ .name = "exynos_idle",
+ .owner = THIS_MODULE,
+ .states = {
+ [0] = ARM_CPUIDLE_WFI_STATE,
+ [1] = {
+ .enter = exynos_enter_lowpower,
+ .exit_latency = 300,
+ .target_residency = 100000,
+ .name = "C1",
+ .desc = "ARM power down",
+ },
+ },
+ .state_count = 2,
+ .safe_state_index = 0,
+};
+
+static struct cpuidle_driver exynos_coupled_idle_driver = {
+ .name = "exynos_coupled_idle",
+ .owner = THIS_MODULE,
+ .states = {
+ [0] = ARM_CPUIDLE_WFI_STATE,
+ [1] = {
+ .enter = exynos_enter_coupled_lowpower,
+ .exit_latency = 5000,
+ .target_residency = 10000,
+ .flags = CPUIDLE_FLAG_COUPLED |
+ CPUIDLE_FLAG_TIMER_STOP,
+ .name = "C1",
+ .desc = "ARM power down",
+ },
+ },
+ .state_count = 2,
+ .safe_state_index = 0,
+};
+
+static int exynos_cpuidle_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ if (IS_ENABLED(CONFIG_SMP) &&
+ of_machine_is_compatible("samsung,exynos4210")) {
+ exynos_cpuidle_pdata = pdev->dev.platform_data;
+
+ ret = cpuidle_register(&exynos_coupled_idle_driver,
+ cpu_possible_mask);
+ } else {
+ exynos_enter_aftr = (void *)(pdev->dev.platform_data);
+
+ ret = cpuidle_register(&exynos_idle_driver, NULL);
+ }
+
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register cpuidle driver\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver exynos_cpuidle_driver = {
+ .probe = exynos_cpuidle_probe,
+ .driver = {
+ .name = "exynos_cpuidle",
+ },
+};
+builtin_platform_driver(exynos_cpuidle_driver);