forked from Minki/linux
96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
|
/* linux/arch/arm/plat-samsung/pd.c
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
|
||
|
|
* http://www.samsung.com
|
||
|
|
*
|
||
|
|
* Samsung Power domain support
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/pm_runtime.h>
|
||
|
|
|
||
|
|
#include <plat/pd.h>
|
||
|
|
|
||
|
|
static int samsung_pd_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct samsung_pd_info *pdata = pdev->dev.platform_data;
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
|
||
|
|
if (!pdata) {
|
||
|
|
dev_err(dev, "no device data specified\n");
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
|
||
|
|
pm_runtime_set_active(dev);
|
||
|
|
pm_runtime_enable(dev);
|
||
|
|
|
||
|
|
dev_info(dev, "power domain registered\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __devexit samsung_pd_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
|
||
|
|
pm_runtime_disable(dev);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int samsung_pd_runtime_suspend(struct device *dev)
|
||
|
|
{
|
||
|
|
struct samsung_pd_info *pdata = dev->platform_data;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (pdata->disable)
|
||
|
|
ret = pdata->disable(dev);
|
||
|
|
|
||
|
|
dev_dbg(dev, "suspended\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int samsung_pd_runtime_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
struct samsung_pd_info *pdata = dev->platform_data;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (pdata->enable)
|
||
|
|
ret = pdata->enable(dev);
|
||
|
|
|
||
|
|
dev_dbg(dev, "resumed\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dev_pm_ops samsung_pd_pm_ops = {
|
||
|
|
.runtime_suspend = samsung_pd_runtime_suspend,
|
||
|
|
.runtime_resume = samsung_pd_runtime_resume,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_driver samsung_pd_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "samsung-pd",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.pm = &samsung_pd_pm_ops,
|
||
|
|
},
|
||
|
|
.probe = samsung_pd_probe,
|
||
|
|
.remove = __devexit_p(samsung_pd_remove),
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init samsung_pd_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = platform_driver_register(&samsung_pd_driver);
|
||
|
|
if (ret)
|
||
|
|
printk(KERN_ERR "%s: failed to add PD driver\n", __func__);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
arch_initcall(samsung_pd_init);
|