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/*
* Runtime PM support code for OMAP1
*
* Author: Kevin Hilman, Deep Root Systems, LLC
*
* Copyright (C) 2010 Texas Instruments, Inc.
*
* 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.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <plat/omap_device.h>
#include <plat/omap-pm.h>
#ifdef CONFIG_PM_RUNTIME
static int omap1_pm_runtime_suspend(struct device *dev)
{
struct clk *iclk, *fclk;
int ret = 0;
dev_dbg(dev, "%s\n", __func__);
ret = pm_generic_runtime_suspend(dev);
fclk = clk_get(dev, "fck");
if (!IS_ERR(fclk)) {
clk_disable(fclk);
clk_put(fclk);
}
iclk = clk_get(dev, "ick");
if (!IS_ERR(iclk)) {
clk_disable(iclk);
clk_put(iclk);
}
return 0;
};
static int omap1_pm_runtime_resume(struct device *dev)
{
struct clk *iclk, *fclk;
dev_dbg(dev, "%s\n", __func__);
iclk = clk_get(dev, "ick");
if (!IS_ERR(iclk)) {
clk_enable(iclk);
clk_put(iclk);
}
fclk = clk_get(dev, "fck");
if (!IS_ERR(fclk)) {
clk_enable(fclk);
clk_put(fclk);
}
return pm_generic_runtime_resume(dev);
};
static int __init omap1_pm_runtime_init(void)
{
const struct dev_pm_ops *pm;
struct dev_pm_ops *omap_pm;
if (!cpu_class_is_omap1())
return -ENODEV;
pm = platform_bus_get_pm_ops();
if (!pm) {
pr_err("%s: unable to get dev_pm_ops from platform_bus\n",
__func__);
return -ENODEV;
}
omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL);
if (!omap_pm) {
pr_err("%s: unable to alloc memory for new dev_pm_ops\n",
__func__);
return -ENOMEM;
}
omap_pm->runtime_suspend = omap1_pm_runtime_suspend;
omap_pm->runtime_resume = omap1_pm_runtime_resume;
platform_bus_set_pm_ops(omap_pm);
return 0;
}
core_initcall(omap1_pm_runtime_init);
#endif /* CONFIG_PM_RUNTIME */
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