Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / cpuidle / cpuidle-mvebu-v7.c

diff --git a/kernel/drivers/cpuidle/cpuidle-mvebu-v7.c b/kernel/drivers/cpuidle/cpuidle-mvebu-v7.c
new file mode 100644 (file)
index 0000000..980151f
--- /dev/null
+++ b/kernel/drivers/cpuidle/cpuidle-mvebu-v7.c
@@ -0,0 +1,143 @@
+/*
+ * Marvell Armada 370, 38x and XP SoC cpuidle driver
+ *
+ * Copyright (C) 2014 Marvell
+ *
+ * Nadav Haklai <nadavh@marvell.com>
+ * Gregory CLEMENT <gregory.clement@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * Maintainer: Gregory CLEMENT <gregory.clement@free-electrons.com>
+ */
+
+#include <linux/cpu_pm.h>
+#include <linux/cpuidle.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/suspend.h>
+#include <linux/platform_device.h>
+#include <asm/cpuidle.h>
+
+#define MVEBU_V7_FLAG_DEEP_IDLE        0x10000
+
+static int (*mvebu_v7_cpu_suspend)(int);
+
+static int mvebu_v7_enter_idle(struct cpuidle_device *dev,
+                               struct cpuidle_driver *drv,
+                               int index)
+{
+       int ret;
+       bool deepidle = false;
+       cpu_pm_enter();
+
+       if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE)
+               deepidle = true;
+
+       ret = mvebu_v7_cpu_suspend(deepidle);
+       cpu_pm_exit();
+
+       if (ret)
+               return ret;
+
+       return index;
+}
+
+static struct cpuidle_driver armadaxp_idle_driver = {
+       .name                   = "armada_xp_idle",
+       .states[0]              = ARM_CPUIDLE_WFI_STATE,
+       .states[1]              = {
+               .enter                  = mvebu_v7_enter_idle,
+               .exit_latency           = 100,
+               .power_usage            = 50,
+               .target_residency       = 1000,
+               .name                   = "MV CPU IDLE",
+               .desc                   = "CPU power down",
+       },
+       .states[2]              = {
+               .enter                  = mvebu_v7_enter_idle,
+               .exit_latency           = 1000,
+               .power_usage            = 5,
+               .target_residency       = 10000,
+               .flags                  = MVEBU_V7_FLAG_DEEP_IDLE,
+               .name                   = "MV CPU DEEP IDLE",
+               .desc                   = "CPU and L2 Fabric power down",
+       },
+       .state_count = 3,
+};
+
+static struct cpuidle_driver armada370_idle_driver = {
+       .name                   = "armada_370_idle",
+       .states[0]              = ARM_CPUIDLE_WFI_STATE,
+       .states[1]              = {
+               .enter                  = mvebu_v7_enter_idle,
+               .exit_latency           = 100,
+               .power_usage            = 5,
+               .target_residency       = 1000,
+               .flags                  = MVEBU_V7_FLAG_DEEP_IDLE,
+               .name                   = "Deep Idle",
+               .desc                   = "CPU and L2 Fabric power down",
+       },
+       .state_count = 2,
+};
+
+static struct cpuidle_driver armada38x_idle_driver = {
+       .name                   = "armada_38x_idle",
+       .states[0]              = ARM_CPUIDLE_WFI_STATE,
+       .states[1]              = {
+               .enter                  = mvebu_v7_enter_idle,
+               .exit_latency           = 10,
+               .power_usage            = 5,
+               .target_residency       = 100,
+               .name                   = "Idle",
+               .desc                   = "CPU and SCU power down",
+       },
+       .state_count = 2,
+};
+
+static int mvebu_v7_cpuidle_probe(struct platform_device *pdev)
+{
+       mvebu_v7_cpu_suspend = pdev->dev.platform_data;
+
+       if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-xp"))
+               return cpuidle_register(&armadaxp_idle_driver, NULL);
+       else if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-370"))
+               return cpuidle_register(&armada370_idle_driver, NULL);
+       else if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-38x"))
+               return cpuidle_register(&armada38x_idle_driver, NULL);
+       else
+               return -EINVAL;
+}
+
+static struct platform_driver armadaxp_cpuidle_plat_driver = {
+       .driver = {
+               .name = "cpuidle-armada-xp",
+       },
+       .probe = mvebu_v7_cpuidle_probe,
+};
+
+module_platform_driver(armadaxp_cpuidle_plat_driver);
+
+static struct platform_driver armada370_cpuidle_plat_driver = {
+       .driver = {
+               .name = "cpuidle-armada-370",
+       },
+       .probe = mvebu_v7_cpuidle_probe,
+};
+
+module_platform_driver(armada370_cpuidle_plat_driver);
+
+static struct platform_driver armada38x_cpuidle_plat_driver = {
+       .driver = {
+               .name = "cpuidle-armada-38x",
+       },
+       .probe = mvebu_v7_cpuidle_probe,
+};
+
+module_platform_driver(armada38x_cpuidle_plat_driver);
+
+MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
+MODULE_DESCRIPTION("Marvell EBU v7 cpuidle driver");
+MODULE_LICENSE("GPL");