2 * Marvell Armada 370, 38x and XP SoC cpuidle driver
4 * Copyright (C) 2014 Marvell
6 * Nadav Haklai <nadavh@marvell.com>
7 * Gregory CLEMENT <gregory.clement@free-electrons.com>
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
13 * Maintainer: Gregory CLEMENT <gregory.clement@free-electrons.com>
16 #include <linux/cpu_pm.h>
17 #include <linux/cpuidle.h>
18 #include <linux/module.h>
20 #include <linux/suspend.h>
21 #include <linux/platform_device.h>
22 #include <asm/cpuidle.h>
24 #define MVEBU_V7_FLAG_DEEP_IDLE 0x10000
26 static int (*mvebu_v7_cpu_suspend)(int);
28 static int mvebu_v7_enter_idle(struct cpuidle_device *dev,
29 struct cpuidle_driver *drv,
33 bool deepidle = false;
36 if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE)
39 ret = mvebu_v7_cpu_suspend(deepidle);
48 static struct cpuidle_driver armadaxp_idle_driver = {
49 .name = "armada_xp_idle",
50 .states[0] = ARM_CPUIDLE_WFI_STATE,
52 .enter = mvebu_v7_enter_idle,
55 .target_residency = 1000,
56 .name = "MV CPU IDLE",
57 .desc = "CPU power down",
60 .enter = mvebu_v7_enter_idle,
63 .target_residency = 10000,
64 .flags = MVEBU_V7_FLAG_DEEP_IDLE,
65 .name = "MV CPU DEEP IDLE",
66 .desc = "CPU and L2 Fabric power down",
71 static struct cpuidle_driver armada370_idle_driver = {
72 .name = "armada_370_idle",
73 .states[0] = ARM_CPUIDLE_WFI_STATE,
75 .enter = mvebu_v7_enter_idle,
78 .target_residency = 1000,
79 .flags = MVEBU_V7_FLAG_DEEP_IDLE,
81 .desc = "CPU and L2 Fabric power down",
86 static struct cpuidle_driver armada38x_idle_driver = {
87 .name = "armada_38x_idle",
88 .states[0] = ARM_CPUIDLE_WFI_STATE,
90 .enter = mvebu_v7_enter_idle,
93 .target_residency = 100,
95 .desc = "CPU and SCU power down",
100 static int mvebu_v7_cpuidle_probe(struct platform_device *pdev)
102 mvebu_v7_cpu_suspend = pdev->dev.platform_data;
104 if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-xp"))
105 return cpuidle_register(&armadaxp_idle_driver, NULL);
106 else if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-370"))
107 return cpuidle_register(&armada370_idle_driver, NULL);
108 else if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-38x"))
109 return cpuidle_register(&armada38x_idle_driver, NULL);
114 static struct platform_driver armadaxp_cpuidle_plat_driver = {
116 .name = "cpuidle-armada-xp",
118 .probe = mvebu_v7_cpuidle_probe,
121 module_platform_driver(armadaxp_cpuidle_plat_driver);
123 static struct platform_driver armada370_cpuidle_plat_driver = {
125 .name = "cpuidle-armada-370",
127 .probe = mvebu_v7_cpuidle_probe,
130 module_platform_driver(armada370_cpuidle_plat_driver);
132 static struct platform_driver armada38x_cpuidle_plat_driver = {
134 .name = "cpuidle-armada-38x",
136 .probe = mvebu_v7_cpuidle_probe,
139 module_platform_driver(armada38x_cpuidle_plat_driver);
141 MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
142 MODULE_DESCRIPTION("Marvell EBU v7 cpuidle driver");
143 MODULE_LICENSE("GPL");