1 /* 2 * Runtime PM support code 3 * 4 * Copyright (C) 2009-2010 Magnus Damm 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 11 #include <linux/init.h> 12 #include <linux/kernel.h> 13 #include <linux/io.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/pm_domain.h> 16 #include <linux/pm_clock.h> 17 #include <linux/platform_device.h> 18 #include <linux/clk.h> 19 #include <linux/sh_clk.h> 20 #include <linux/bitmap.h> 21 #include <linux/slab.h> 22 23 #ifdef CONFIG_PM_RUNTIME 24 static struct dev_pm_domain default_pm_domain = { 25 .ops = { 26 .runtime_suspend = pm_clk_suspend, 27 .runtime_resume = pm_clk_resume, 28 USE_PLATFORM_PM_SLEEP_OPS 29 }, 30 }; 31 32 #define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain) 33 34 #else 35 36 #define DEFAULT_PM_DOMAIN_PTR NULL 37 38 #endif /* CONFIG_PM_RUNTIME */ 39 40 static struct pm_clk_notifier_block platform_bus_notifier = { 41 .pm_domain = DEFAULT_PM_DOMAIN_PTR, 42 .con_ids = { NULL, }, 43 }; 44 45 static bool default_pm_on; 46 47 static int __init sh_pm_runtime_init(void) 48 { 49 if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) { 50 if (!of_machine_is_compatible("renesas,emev2") && 51 !of_machine_is_compatible("renesas,r7s72100") && 52 !of_machine_is_compatible("renesas,r8a73a4") && 53 !of_machine_is_compatible("renesas,r8a7740") && 54 !of_machine_is_compatible("renesas,r8a7778") && 55 !of_machine_is_compatible("renesas,r8a7779") && 56 !of_machine_is_compatible("renesas,r8a7790") && 57 !of_machine_is_compatible("renesas,r8a7791") && 58 !of_machine_is_compatible("renesas,sh7372") && 59 !of_machine_is_compatible("renesas,sh73a0")) 60 return 0; 61 } 62 63 default_pm_on = true; 64 pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); 65 return 0; 66 } 67 core_initcall(sh_pm_runtime_init); 68 69 static int __init sh_pm_runtime_late_init(void) 70 { 71 if (default_pm_on) 72 pm_genpd_poweroff_unused(); 73 return 0; 74 } 75 late_initcall(sh_pm_runtime_late_init); 76