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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) { int ret; dev_dbg(dev, "%s\n", __func__); ret = pm_generic_runtime_suspend(dev); if (ret) return ret; ret = pm_runtime_clk_suspend(dev); if (ret) { pm_generic_runtime_resume(dev); return ret; } return 0; } static int omap1_pm_runtime_resume(struct device *dev) { dev_dbg(dev, "%s\n", __func__); pm_runtime_clk_resume(dev); return pm_generic_runtime_resume(dev); } static struct dev_power_domain default_power_domain = { .ops = { .runtime_suspend = omap1_pm_runtime_suspend, .runtime_resume = omap1_pm_runtime_resume, USE_PLATFORM_PM_SLEEP_OPS }, }; #define OMAP1_PWR_DOMAIN (&default_power_domain) #else #define OMAP1_PWR_DOMAIN NULL #endif /* CONFIG_PM_RUNTIME */ static struct pm_clk_notifier_block platform_bus_notifier = { .pwr_domain = OMAP1_PWR_DOMAIN, .con_ids = { "ick", "fck", NULL, }, }; static int __init omap1_pm_runtime_init(void) { if (!cpu_class_is_omap1()) return -ENODEV; pm_runtime_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); return 0; } core_initcall(omap1_pm_runtime_init); |