101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
/*
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* Runtime PM support code for OMAP1
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*
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* Author: Kevin Hilman, Deep Root Systems, LLC
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*
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* Copyright (C) 2010 Texas Instruments, Inc.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <plat/omap_device.h>
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#include <plat/omap-pm.h>
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#ifdef CONFIG_PM_RUNTIME
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static int omap1_pm_runtime_suspend(struct device *dev)
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{
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struct clk *iclk, *fclk;
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int ret = 0;
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dev_dbg(dev, "%s\n", __func__);
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ret = pm_generic_runtime_suspend(dev);
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fclk = clk_get(dev, "fck");
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if (!IS_ERR(fclk)) {
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clk_disable(fclk);
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clk_put(fclk);
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}
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iclk = clk_get(dev, "ick");
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if (!IS_ERR(iclk)) {
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clk_disable(iclk);
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clk_put(iclk);
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}
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return 0;
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};
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static int omap1_pm_runtime_resume(struct device *dev)
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{
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struct clk *iclk, *fclk;
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dev_dbg(dev, "%s\n", __func__);
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iclk = clk_get(dev, "ick");
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if (!IS_ERR(iclk)) {
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clk_enable(iclk);
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clk_put(iclk);
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}
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fclk = clk_get(dev, "fck");
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if (!IS_ERR(fclk)) {
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clk_enable(fclk);
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clk_put(fclk);
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}
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return pm_generic_runtime_resume(dev);
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};
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static int __init omap1_pm_runtime_init(void)
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{
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const struct dev_pm_ops *pm;
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struct dev_pm_ops *omap_pm;
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if (!cpu_class_is_omap1())
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return -ENODEV;
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pm = platform_bus_get_pm_ops();
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if (!pm) {
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pr_err("%s: unable to get dev_pm_ops from platform_bus\n",
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__func__);
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return -ENODEV;
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}
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omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL);
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if (!omap_pm) {
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pr_err("%s: unable to alloc memory for new dev_pm_ops\n",
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__func__);
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return -ENOMEM;
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}
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omap_pm->runtime_suspend = omap1_pm_runtime_suspend;
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omap_pm->runtime_resume = omap1_pm_runtime_resume;
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platform_bus_set_pm_ops(omap_pm);
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return 0;
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}
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core_initcall(omap1_pm_runtime_init);
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#endif /* CONFIG_PM_RUNTIME */
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