mirror of https://gitee.com/openkylin/linux.git
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
|
/*
|
||
|
* PM domain driver for Keystone2 devices
|
||
|
*
|
||
|
* Copyright 2013 Texas Instruments, Inc.
|
||
|
* Santosh Shilimkar <santosh.shillimkar@ti.com>
|
||
|
*
|
||
|
* Based on Kevins work on DAVINCI SOCs
|
||
|
* Kevin Hilman <khilman@linaro.org>
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
* under the terms and conditions of the GNU General Public License,
|
||
|
* version 2, as published by the Free Software Foundation.
|
||
|
*/
|
||
|
|
||
|
#include <linux/init.h>
|
||
|
#include <linux/pm_runtime.h>
|
||
|
#include <linux/pm_clock.h>
|
||
|
#include <linux/platform_device.h>
|
||
|
#include <linux/clk-provider.h>
|
||
|
|
||
|
#ifdef CONFIG_PM_RUNTIME
|
||
|
static int keystone_pm_runtime_suspend(struct device *dev)
|
||
|
{
|
||
|
int ret;
|
||
|
|
||
|
dev_dbg(dev, "%s\n", __func__);
|
||
|
|
||
|
ret = pm_generic_runtime_suspend(dev);
|
||
|
if (ret)
|
||
|
return ret;
|
||
|
|
||
|
ret = pm_clk_suspend(dev);
|
||
|
if (ret) {
|
||
|
pm_generic_runtime_resume(dev);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int keystone_pm_runtime_resume(struct device *dev)
|
||
|
{
|
||
|
dev_dbg(dev, "%s\n", __func__);
|
||
|
|
||
|
pm_clk_resume(dev);
|
||
|
|
||
|
return pm_generic_runtime_resume(dev);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
static struct dev_pm_domain keystone_pm_domain = {
|
||
|
.ops = {
|
||
|
SET_RUNTIME_PM_OPS(keystone_pm_runtime_suspend,
|
||
|
keystone_pm_runtime_resume, NULL)
|
||
|
USE_PLATFORM_PM_SLEEP_OPS
|
||
|
},
|
||
|
};
|
||
|
|
||
|
static struct pm_clk_notifier_block platform_domain_notifier = {
|
||
|
.pm_domain = &keystone_pm_domain,
|
||
|
};
|
||
|
|
||
|
int __init keystone_pm_runtime_init(void)
|
||
|
{
|
||
|
of_clk_init(NULL);
|
||
|
pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
subsys_initcall(keystone_pm_runtime_init);
|