mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
ab319939a5
As the driver doesn't support unbinding, nor does it support arbitary binding of devices, disable the bind/unbind attributes for this driver. Also, as the driver has no remove function, it can never be modular, so use builtin_platform_driver() to avoid the module exit boilerplate. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
/*
|
|
* 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)
|
|
{
|
|
const struct platform_device_id *id = pdev->id_entry;
|
|
|
|
if (!id)
|
|
return -EINVAL;
|
|
|
|
mvebu_v7_cpu_suspend = pdev->dev.platform_data;
|
|
|
|
return cpuidle_register((struct cpuidle_driver *)id->driver_data, NULL);
|
|
}
|
|
|
|
static const struct platform_device_id mvebu_cpuidle_ids[] = {
|
|
{
|
|
.name = "cpuidle-armada-xp",
|
|
.driver_data = (unsigned long)&armadaxp_idle_driver,
|
|
}, {
|
|
.name = "cpuidle-armada-370",
|
|
.driver_data = (unsigned long)&armada370_idle_driver,
|
|
}, {
|
|
.name = "cpuidle-armada-38x",
|
|
.driver_data = (unsigned long)&armada38x_idle_driver,
|
|
},
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver mvebu_cpuidle_driver = {
|
|
.probe = mvebu_v7_cpuidle_probe,
|
|
.driver = {
|
|
.name = "cpuidle-mbevu",
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.id_table = mvebu_cpuidle_ids,
|
|
};
|
|
|
|
builtin_platform_driver(mvebu_cpuidle_driver);
|
|
|
|
MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>");
|
|
MODULE_DESCRIPTION("Marvell EBU v7 cpuidle driver");
|
|
MODULE_LICENSE("GPL");
|