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 25 static int default_platform_runtime_idle(struct device *dev) 26 { 27 /* suspend synchronously to disable clocks immediately */ 28 return 0; 29 } 30 31 static struct dev_pm_domain default_pm_domain = { 32 .ops = { 33 .runtime_suspend = pm_clk_suspend, 34 .runtime_resume = pm_clk_resume, 35 .runtime_idle = default_platform_runtime_idle, 36 USE_PLATFORM_PM_SLEEP_OPS 37 }, 38 }; 39 40 #define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain) 41 42 #else 43 44 #define DEFAULT_PM_DOMAIN_PTR NULL 45 46 #endif /* CONFIG_PM_RUNTIME */ 47 48 static struct pm_clk_notifier_block platform_bus_notifier = { 49 .pm_domain = DEFAULT_PM_DOMAIN_PTR, 50 .con_ids = { NULL, }, 51 }; 52 53 static bool default_pm_on; 54 55 static int __init sh_pm_runtime_init(void) 56 { 57 if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) { 58 if (!of_machine_is_compatible("renesas,emev2") && 59 !of_machine_is_compatible("renesas,r7s72100") && 60 !of_machine_is_compatible("renesas,r8a73a4") && 61 !of_machine_is_compatible("renesas,r8a7740") && 62 !of_machine_is_compatible("renesas,r8a7778") && 63 !of_machine_is_compatible("renesas,r8a7779") && 64 !of_machine_is_compatible("renesas,r8a7790") && 65 !of_machine_is_compatible("renesas,r8a7791") && 66 !of_machine_is_compatible("renesas,sh7372") && 67 !of_machine_is_compatible("renesas,sh73a0")) 68 return 0; 69 } 70 71 default_pm_on = true; 72 pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); 73 return 0; 74 } 75 core_initcall(sh_pm_runtime_init); 76 77 static int __init sh_pm_runtime_late_init(void) 78 { 79 if (default_pm_on) 80 pm_genpd_poweroff_unused(); 81 return 0; 82 } 83 late_initcall(sh_pm_runtime_late_init); 84