85eb8c8d0b
Many different platforms and subsystems may want to disable device clocks during suspend and enable them during resume which is going to be done in a very similar way in all those cases. For this reason, provide generic routines for the manipulation of device clocks during suspend and resume. Convert the ARM shmobile platform to using the new routines. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
|
|
* arch/arm/mach-shmobile/pm_runtime.c
|
|
*
|
|
* Runtime PM support code for SuperH Mobile ARM
|
|
*
|
|
* 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/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 default_platform_runtime_idle(struct device *dev)
|
|
{
|
|
/* suspend synchronously to disable clocks immediately */
|
|
return pm_runtime_suspend(dev);
|
|
}
|
|
|
|
static struct dev_power_domain default_power_domain = {
|
|
.ops = {
|
|
.runtime_suspend = pm_runtime_clk_suspend,
|
|
.runtime_resume = pm_runtime_clk_resume,
|
|
.runtime_idle = default_platform_runtime_idle,
|
|
USE_PLATFORM_PM_SLEEP_OPS
|
|
},
|
|
};
|
|
|
|
#define DEFAULT_PWR_DOMAIN_PTR (&default_power_domain)
|
|
|
|
#else
|
|
|
|
#define DEFAULT_PWR_DOMAIN_PTR NULL
|
|
|
|
#endif /* CONFIG_PM_RUNTIME */
|
|
|
|
static struct pm_clk_notifier_block platform_bus_notifier = {
|
|
.pwr_domain = DEFAULT_PWR_DOMAIN_PTR,
|
|
.con_ids = { NULL, },
|
|
};
|
|
|
|
static int __init sh_pm_runtime_init(void)
|
|
{
|
|
pm_runtime_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
|
|
return 0;
|
|
}
|
|
core_initcall(sh_pm_runtime_init);
|