1ce9dcb87SKevin Hilman /* 2ce9dcb87SKevin Hilman * Runtime PM support code for DaVinci 3ce9dcb87SKevin Hilman * 4ce9dcb87SKevin Hilman * Author: Kevin Hilman 5ce9dcb87SKevin Hilman * 6ce9dcb87SKevin Hilman * Copyright (C) 2012 Texas Instruments, Inc. 7ce9dcb87SKevin Hilman * 8ce9dcb87SKevin Hilman * This file is licensed under the terms of the GNU General Public 9ce9dcb87SKevin Hilman * License version 2. This program is licensed "as is" without any 10ce9dcb87SKevin Hilman * warranty of any kind, whether express or implied. 11ce9dcb87SKevin Hilman */ 12ce9dcb87SKevin Hilman #include <linux/init.h> 13ce9dcb87SKevin Hilman #include <linux/pm_runtime.h> 14ce9dcb87SKevin Hilman #include <linux/pm_clock.h> 15ce9dcb87SKevin Hilman #include <linux/platform_device.h> 16ce9dcb87SKevin Hilman 17ce9dcb87SKevin Hilman #ifdef CONFIG_PM_RUNTIME 18ce9dcb87SKevin Hilman static int davinci_pm_runtime_suspend(struct device *dev) 19ce9dcb87SKevin Hilman { 20ce9dcb87SKevin Hilman int ret; 21ce9dcb87SKevin Hilman 22ce9dcb87SKevin Hilman dev_dbg(dev, "%s\n", __func__); 23ce9dcb87SKevin Hilman 24ce9dcb87SKevin Hilman ret = pm_generic_runtime_suspend(dev); 25ce9dcb87SKevin Hilman if (ret) 26ce9dcb87SKevin Hilman return ret; 27ce9dcb87SKevin Hilman 28ce9dcb87SKevin Hilman ret = pm_clk_suspend(dev); 29ce9dcb87SKevin Hilman if (ret) { 30ce9dcb87SKevin Hilman pm_generic_runtime_resume(dev); 31ce9dcb87SKevin Hilman return ret; 32ce9dcb87SKevin Hilman } 33ce9dcb87SKevin Hilman 34ce9dcb87SKevin Hilman return 0; 35ce9dcb87SKevin Hilman } 36ce9dcb87SKevin Hilman 37ce9dcb87SKevin Hilman static int davinci_pm_runtime_resume(struct device *dev) 38ce9dcb87SKevin Hilman { 39ce9dcb87SKevin Hilman dev_dbg(dev, "%s\n", __func__); 40ce9dcb87SKevin Hilman 41ce9dcb87SKevin Hilman pm_clk_resume(dev); 42ce9dcb87SKevin Hilman return pm_generic_runtime_resume(dev); 43ce9dcb87SKevin Hilman } 44ce9dcb87SKevin Hilman #endif 45ce9dcb87SKevin Hilman 46ce9dcb87SKevin Hilman static struct dev_pm_domain davinci_pm_domain = { 47ce9dcb87SKevin Hilman .ops = { 48ce9dcb87SKevin Hilman SET_RUNTIME_PM_OPS(davinci_pm_runtime_suspend, 49ce9dcb87SKevin Hilman davinci_pm_runtime_resume, NULL) 50ce9dcb87SKevin Hilman USE_PLATFORM_PM_SLEEP_OPS 51ce9dcb87SKevin Hilman }, 52ce9dcb87SKevin Hilman }; 53ce9dcb87SKevin Hilman 54ce9dcb87SKevin Hilman static struct pm_clk_notifier_block platform_bus_notifier = { 55ce9dcb87SKevin Hilman .pm_domain = &davinci_pm_domain, 56*9a3e89b1SLad, Prabhakar .con_ids = { "fck", "master", "slave", NULL }, 57ce9dcb87SKevin Hilman }; 58ce9dcb87SKevin Hilman 59ce9dcb87SKevin Hilman static int __init davinci_pm_runtime_init(void) 60ce9dcb87SKevin Hilman { 61ce9dcb87SKevin Hilman pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); 62ce9dcb87SKevin Hilman 63ce9dcb87SKevin Hilman return 0; 64ce9dcb87SKevin Hilman } 65ce9dcb87SKevin Hilman core_initcall(davinci_pm_runtime_init); 66