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/*
* 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>
#include <linux/of.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,
};
static struct of_device_id of_keystone_table[] = {
{.compatible = "ti,keystone"},
{ /* end of list */ },
};
int __init keystone_pm_runtime_init(void)
{
struct device_node *np;
np = of_find_matching_node(NULL, of_keystone_table);
if (!np)
return 0;
of_clk_init(NULL);
pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
return 0;
}
subsys_initcall(keystone_pm_runtime_init);
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