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- /*
- * Runtime PM support code for OMAP
- *
- * 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 <plat/omap_device.h>
- #include <plat/omap-pm.h>
- #ifdef CONFIG_PM_RUNTIME
- int omap_pm_runtime_suspend(struct device *dev)
- {
- struct platform_device *pdev = to_platform_device(dev);
- int r, ret = 0;
- dev_dbg(dev, "%s\n", __func__);
- ret = pm_generic_runtime_suspend(dev);
- if (!ret && dev->parent == &omap_device_parent) {
- r = omap_device_idle(pdev);
- WARN_ON(r);
- }
- return ret;
- };
- int omap_pm_runtime_resume(struct device *dev)
- {
- struct platform_device *pdev = to_platform_device(dev);
- int r;
- dev_dbg(dev, "%s\n", __func__);
- if (dev->parent == &omap_device_parent) {
- r = omap_device_enable(pdev);
- WARN_ON(r);
- }
- return pm_generic_runtime_resume(dev);
- };
- #else
- #define omap_pm_runtime_suspend NULL
- #define omap_pm_runtime_resume NULL
- #endif /* CONFIG_PM_RUNTIME */
- static int __init omap_pm_runtime_init(void)
- {
- const struct dev_pm_ops *pm;
- struct dev_pm_ops *omap_pm;
- 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 = omap_pm_runtime_suspend;
- omap_pm->runtime_resume = omap_pm_runtime_resume;
- platform_bus_set_pm_ops(omap_pm);
- return 0;
- }
- core_initcall(omap_pm_runtime_init);
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