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Gregory CLEMENTf50ee822014-07-23 15:00:48 +02001/*
Thomas Petazzonic16788b2014-07-23 15:00:50 +02002 * Marvell Armada 370, 38x and XP SoC cpuidle driver
Gregory CLEMENTf50ee822014-07-23 15:00:48 +02003 *
4 * Copyright (C) 2014 Marvell
5 *
6 * Nadav Haklai <nadavh@marvell.com>
7 * Gregory CLEMENT <gregory.clement@free-electrons.com>
8 *
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.
12 *
13 * Maintainer: Gregory CLEMENT <gregory.clement@free-electrons.com>
14 */
15
16#include <linux/cpu_pm.h>
17#include <linux/cpuidle.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/suspend.h>
21#include <linux/platform_device.h>
22#include <asm/cpuidle.h>
23
24#define MVEBU_V7_FLAG_DEEP_IDLE 0x10000
25
26static int (*mvebu_v7_cpu_suspend)(int);
27
28static int mvebu_v7_enter_idle(struct cpuidle_device *dev,
29 struct cpuidle_driver *drv,
30 int index)
31{
32 int ret;
33 bool deepidle = false;
34 cpu_pm_enter();
35
36 if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE)
37 deepidle = true;
38
39 ret = mvebu_v7_cpu_suspend(deepidle);
Gregory CLEMENT43b68872015-02-26 18:20:48 +010040 cpu_pm_exit();
41
Gregory CLEMENTf50ee822014-07-23 15:00:48 +020042 if (ret)
43 return ret;
44
Gregory CLEMENTf50ee822014-07-23 15:00:48 +020045 return index;
46}
47
48static struct cpuidle_driver armadaxp_idle_driver = {
49 .name = "armada_xp_idle",
50 .states[0] = ARM_CPUIDLE_WFI_STATE,
51 .states[1] = {
52 .enter = mvebu_v7_enter_idle,
Sebastien Rannouce6031c2015-02-13 15:55:03 +010053 .exit_latency = 100,
Gregory CLEMENTf50ee822014-07-23 15:00:48 +020054 .power_usage = 50,
Sebastien Rannouce6031c2015-02-13 15:55:03 +010055 .target_residency = 1000,
Gregory CLEMENTf50ee822014-07-23 15:00:48 +020056 .name = "MV CPU IDLE",
57 .desc = "CPU power down",
58 },
59 .states[2] = {
60 .enter = mvebu_v7_enter_idle,
Sebastien Rannouce6031c2015-02-13 15:55:03 +010061 .exit_latency = 1000,
Gregory CLEMENTf50ee822014-07-23 15:00:48 +020062 .power_usage = 5,
Sebastien Rannouce6031c2015-02-13 15:55:03 +010063 .target_residency = 10000,
Daniel Lezcanob82b6cc2014-11-12 16:03:50 +010064 .flags = MVEBU_V7_FLAG_DEEP_IDLE,
Gregory CLEMENTf50ee822014-07-23 15:00:48 +020065 .name = "MV CPU DEEP IDLE",
66 .desc = "CPU and L2 Fabric power down",
67 },
68 .state_count = 3,
69};
70
Thomas Petazzonic3c7fe72014-07-23 15:00:49 +020071static struct cpuidle_driver armada370_idle_driver = {
72 .name = "armada_370_idle",
73 .states[0] = ARM_CPUIDLE_WFI_STATE,
74 .states[1] = {
75 .enter = mvebu_v7_enter_idle,
76 .exit_latency = 100,
77 .power_usage = 5,
78 .target_residency = 1000,
Daniel Lezcanob82b6cc2014-11-12 16:03:50 +010079 .flags = MVEBU_V7_FLAG_DEEP_IDLE,
Thomas Petazzonic3c7fe72014-07-23 15:00:49 +020080 .name = "Deep Idle",
81 .desc = "CPU and L2 Fabric power down",
82 },
83 .state_count = 2,
84};
85
Thomas Petazzonic16788b2014-07-23 15:00:50 +020086static struct cpuidle_driver armada38x_idle_driver = {
87 .name = "armada_38x_idle",
88 .states[0] = ARM_CPUIDLE_WFI_STATE,
89 .states[1] = {
90 .enter = mvebu_v7_enter_idle,
91 .exit_latency = 10,
92 .power_usage = 5,
93 .target_residency = 100,
Thomas Petazzonic16788b2014-07-23 15:00:50 +020094 .name = "Idle",
95 .desc = "CPU and SCU power down",
96 },
97 .state_count = 2,
98};
99
Gregory CLEMENTf50ee822014-07-23 15:00:48 +0200100static int mvebu_v7_cpuidle_probe(struct platform_device *pdev)
101{
Russell Kingda1a64f2015-10-03 00:24:25 +0100102 const struct platform_device_id *id = pdev->id_entry;
103
104 if (!id)
105 return -EINVAL;
106
Gregory CLEMENTf50ee822014-07-23 15:00:48 +0200107 mvebu_v7_cpu_suspend = pdev->dev.platform_data;
Thomas Petazzonic3c7fe72014-07-23 15:00:49 +0200108
Russell Kingda1a64f2015-10-03 00:24:25 +0100109 return cpuidle_register((struct cpuidle_driver *)id->driver_data, NULL);
Gregory CLEMENTf50ee822014-07-23 15:00:48 +0200110}
111
Russell Kingda1a64f2015-10-03 00:24:25 +0100112static const struct platform_device_id mvebu_cpuidle_ids[] = {
113 {
Gregory CLEMENTf50ee822014-07-23 15:00:48 +0200114 .name = "cpuidle-armada-xp",
Russell Kingda1a64f2015-10-03 00:24:25 +0100115 .driver_data = (unsigned long)&armadaxp_idle_driver,
116 }, {
Thomas Petazzonic3c7fe72014-07-23 15:00:49 +0200117 .name = "cpuidle-armada-370",
Russell Kingda1a64f2015-10-03 00:24:25 +0100118 .driver_data = (unsigned long)&armada370_idle_driver,
119 }, {
Thomas Petazzonic16788b2014-07-23 15:00:50 +0200120 .name = "cpuidle-armada-38x",
Russell Kingda1a64f2015-10-03 00:24:25 +0100121 .driver_data = (unsigned long)&armada38x_idle_driver,
Thomas Petazzonic16788b2014-07-23 15:00:50 +0200122 },
Russell Kingda1a64f2015-10-03 00:24:25 +0100123 {}
Thomas Petazzonic16788b2014-07-23 15:00:50 +0200124};
125
Russell Kingda1a64f2015-10-03 00:24:25 +0100126static struct platform_driver mvebu_cpuidle_driver = {
127 .probe = mvebu_v7_cpuidle_probe,
128 .driver = {
129 .name = "cpuidle-mbevu",
130 },
131 .id_table = mvebu_cpuidle_ids,
132};
133
134module_platform_driver(mvebu_cpuidle_driver);
Thomas Petazzonic16788b2014-07-23 15:00:50 +0200135
Gregory CLEMENTf50ee822014-07-23 15:00:48 +0200136MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
137MODULE_DESCRIPTION("Marvell EBU v7 cpuidle driver");
138MODULE_LICENSE("GPL");