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

/*
 * Marvell Armada 370 and Armada 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);
	if (ret)
		return ret;

	cpu_pm_exit();

	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		= 10,
		.power_usage		= 50,
		.target_residency	= 100,
		.flags			= CPUIDLE_FLAG_TIME_VALID,
		.name			= "MV CPU IDLE",
		.desc			= "CPU power down",
	},
	.states[2]		= {
		.enter			= mvebu_v7_enter_idle,
		.exit_latency		= 100,
		.power_usage		= 5,
		.target_residency	= 1000,
		.flags			= CPUIDLE_FLAG_TIME_VALID |
						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			= (CPUIDLE_FLAG_TIME_VALID |
					   MVEBU_V7_FLAG_DEEP_IDLE),
		.name			= "Deep Idle",
		.desc			= "CPU and L2 Fabric 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
		return -EINVAL;
}

static struct platform_driver armadaxp_cpuidle_plat_driver = {
	.driver = {
		.name = "cpuidle-armada-xp",
		.owner = THIS_MODULE,
	},
	.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",
		.owner = THIS_MODULE,
	},
	.probe = mvebu_v7_cpuidle_probe,
};

module_platform_driver(armada370_cpuidle_plat_driver);

MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
MODULE_DESCRIPTION("Marvell EBU v7 cpuidle driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
b858fbc1 GC	1	/*
	2	* Marvell Armada 370 and Armada XP SoC cpuidle driver
	3	*
	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
f50ee824	24	#define MVEBU_V7_FLAG_DEEP_IDLE 0x10000
b858fbc1	25
f50ee824	26	static int (*mvebu_v7_cpu_suspend)(int);
b858fbc1	27
f50ee824	28	static int mvebu_v7_enter_idle(struct cpuidle_device *dev,
b858fbc1 GC	29	struct cpuidle_driver *drv,
	30	int index)
	31	{
	32	int ret;
	33	bool deepidle = false;
	34	cpu_pm_enter();
	35
f50ee824	36	if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE)
b858fbc1 GC	37	deepidle = true;
b858fbc1 GC	38
f50ee824	39	ret = mvebu_v7_cpu_suspend(deepidle);
b858fbc1 GC	40	if (ret)
	41	return ret;
	42
	43	cpu_pm_exit();
	44
	45	return index;
	46	}
	47
f50ee824 GC	48	static struct cpuidle_driver armadaxp_idle_driver = {
f50ee824 GC	49	.name = "armada_xp_idle",
b858fbc1 GC	50	.states[0] = ARM_CPUIDLE_WFI_STATE,
b858fbc1 GC	51	.states[1] = {
f50ee824	52	.enter = mvebu_v7_enter_idle,
b858fbc1 GC	53	.exit_latency = 10,
	54	.power_usage = 50,
	55	.target_residency = 100,
	56	.flags = CPUIDLE_FLAG_TIME_VALID,
	57	.name = "MV CPU IDLE",
	58	.desc = "CPU power down",
	59	},
	60	.states[2] = {
f50ee824	61	.enter = mvebu_v7_enter_idle,
b858fbc1 GC	62	.exit_latency = 100,
	63	.power_usage = 5,
	64	.target_residency = 1000,
	65	.flags = CPUIDLE_FLAG_TIME_VALID \|
f50ee824	66	MVEBU_V7_FLAG_DEEP_IDLE,
b858fbc1 GC	67	.name = "MV CPU DEEP IDLE",
	68	.desc = "CPU and L2 Fabric power down",
	69	},
f50ee824	70	.state_count = 3,
b858fbc1 GC	71	};
b858fbc1 GC	72
c3c7fe7c TP	73	static struct cpuidle_driver armada370_idle_driver = {
	74	.name = "armada_370_idle",
	75	.states[0] = ARM_CPUIDLE_WFI_STATE,
	76	.states[1] = {
	77	.enter = mvebu_v7_enter_idle,
	78	.exit_latency = 100,
	79	.power_usage = 5,
	80	.target_residency = 1000,
	81	.flags = (CPUIDLE_FLAG_TIME_VALID \|
	82	MVEBU_V7_FLAG_DEEP_IDLE),
	83	.name = "Deep Idle",
	84	.desc = "CPU and L2 Fabric power down",
	85	},
	86	.state_count = 2,
	87	};
	88
f50ee824	89	static int mvebu_v7_cpuidle_probe(struct platform_device *pdev)
b858fbc1	90	{
f50ee824	91	mvebu_v7_cpu_suspend = pdev->dev.platform_data;
c3c7fe7c TP	92
	93	if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-xp"))
	94	return cpuidle_register(&armadaxp_idle_driver, NULL);
	95	else if (!strcmp(pdev->dev.driver->name, "cpuidle-armada-370"))
	96	return cpuidle_register(&armada370_idle_driver, NULL);
	97	else
	98	return -EINVAL;
b858fbc1 GC	99	}
b858fbc1 GC	100
f50ee824	101	static struct platform_driver armadaxp_cpuidle_plat_driver = {
b858fbc1	102	.driver = {
f50ee824	103	.name = "cpuidle-armada-xp",
b858fbc1 GC	104	.owner = THIS_MODULE,
b858fbc1 GC	105	},
f50ee824	106	.probe = mvebu_v7_cpuidle_probe,
b858fbc1 GC	107	};
b858fbc1 GC	108
f50ee824	109	module_platform_driver(armadaxp_cpuidle_plat_driver);
b858fbc1	110
c3c7fe7c TP	111	static struct platform_driver armada370_cpuidle_plat_driver = {
	112	.driver = {
	113	.name = "cpuidle-armada-370",
	114	.owner = THIS_MODULE,
	115	},
	116	.probe = mvebu_v7_cpuidle_probe,
	117	};
	118
	119	module_platform_driver(armada370_cpuidle_plat_driver);
	120
b858fbc1	121	MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
f50ee824	122	MODULE_DESCRIPTION("Marvell EBU v7 cpuidle driver");
b858fbc1	123	MODULE_LICENSE("GPL");