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pm_runtime.c
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/* * Runtime PM support code * * Copyright (C) 2009-2010 Magnus Damm * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/pm_runtime.h> #include <linux/pm_domain.h> #include <linux/pm_clock.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/sh_clk.h> #include <linux/bitmap.h> #include <linux/slab.h> #ifdef CONFIG_PM_RUNTIME static int sh_pm_runtime_suspend(struct device *dev) { int ret; ret = pm_generic_runtime_suspend(dev); if (ret) { dev_err(dev, "failed to suspend device\n"); return ret; } ret = pm_clk_suspend(dev); if (ret) { dev_err(dev, "failed to suspend clock\n"); pm_generic_runtime_resume(dev); return ret; } return 0; } static int sh_pm_runtime_resume(struct device *dev) { int ret; ret = pm_clk_resume(dev); if (ret) { dev_err(dev, "failed to resume clock\n"); return ret; } return pm_generic_runtime_resume(dev); } static struct dev_pm_domain default_pm_domain = { .ops = { .runtime_suspend = sh_pm_runtime_suspend, .runtime_resume = sh_pm_runtime_resume, USE_PLATFORM_PM_SLEEP_OPS }, }; #define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain) #else #define DEFAULT_PM_DOMAIN_PTR NULL #endif /* CONFIG_PM_RUNTIME */ static struct pm_clk_notifier_block platform_bus_notifier = { .pm_domain = DEFAULT_PM_DOMAIN_PTR, .con_ids = { NULL, }, }; static bool default_pm_on; static int __init sh_pm_runtime_init(void) { if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) { if (!of_machine_is_compatible("renesas,emev2") && !of_machine_is_compatible("renesas,r7s72100") && !of_machine_is_compatible("renesas,r8a73a4") && !of_machine_is_compatible("renesas,r8a7740") && !of_machine_is_compatible("renesas,r8a7778") && !of_machine_is_compatible("renesas,r8a7779") && !of_machine_is_compatible("renesas,r8a7790") && !of_machine_is_compatible("renesas,r8a7791") && !of_machine_is_compatible("renesas,r8a7792") && !of_machine_is_compatible("renesas,r8a7793") && !of_machine_is_compatible("renesas,r8a7794") && !of_machine_is_compatible("renesas,sh7372") && !of_machine_is_compatible("renesas,sh73a0")) return 0; } default_pm_on = true; pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); return 0; } core_initcall(sh_pm_runtime_init); static int __init sh_pm_runtime_late_init(void) { if (default_pm_on) pm_genpd_poweroff_unused(); return 0; } late_initcall(sh_pm_runtime_late_init);
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