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/*
* Copyright (c) 2014, Linaro Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/cpuidle.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <soc/qcom/pm.h>
#include "dt_idle_states.h"
static struct qcom_cpu_pm_ops *lpm_ops;
static int qcom_cpu_stby(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
int ret;
ret = lpm_ops->standby(NULL);
if (ret)
return ret;
return index;
}
static int qcom_cpu_spc(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
int ret;
ret = lpm_ops->spc(NULL);
if (ret)
return ret;
return index;
}
static struct cpuidle_driver qcom_cpuidle_driver = {
.name = "qcom_cpuidle",
};
static const struct of_device_id qcom_idle_state_match[] = {
{ .compatible = "qcom,idle-state-stby", .data = qcom_cpu_stby },
{ .compatible = "qcom,idle-state-spc", .data = qcom_cpu_spc },
{ },
};
static int qcom_cpuidle_probe(struct platform_device *pdev)
{
struct cpuidle_driver *drv = &qcom_cpuidle_driver;
int ret;
lpm_ops = pdev->dev.platform_data;
/* Probe for other states, including standby */
ret = dt_init_idle_driver(drv, qcom_idle_state_match, 0);
if (ret < 0)
return ret;
/*
* We will not register for cpu's cpuidle device here,
* they will be registered as and when their power controllers
* are ready.
*/
return cpuidle_register_driver(drv);
}
static struct platform_driver qcom_cpuidle = {
.probe = qcom_cpuidle_probe,
.driver = {
.name = "qcom_cpuidle",
},
};
/*
* Register the driver early so the we have a successul registration
* when the device shows up.
* This way the cpuidle driver could be registered before the cpuidle
* devices are registered.
*/
static int __init qcom_cpuidle_driver_init(void)
{
return platform_driver_register(&qcom_cpuidle);
}
core_initcall(qcom_cpuidle_driver_init);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("CPUIDLE driver for QCOM SoC");
MODULE_ALIAS("platform:qcom-cpuidle");
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