1f83b8f148
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
173 lines
3.7 KiB
C
173 lines
3.7 KiB
C
/*
|
|
* File: arch/blackfin/mach-common/pm.c
|
|
* Based on: arm/mach-omap/pm.c
|
|
* Author: Cliff Brake <cbrake@accelent.com> Copyright (c) 2001
|
|
*
|
|
* Created: 2001
|
|
* Description: Power management for the bfin
|
|
*
|
|
* Modified: Nicolas Pitre - PXA250 support
|
|
* Copyright (c) 2002 Monta Vista Software, Inc.
|
|
* David Singleton - OMAP1510
|
|
* Copyright (c) 2002 Monta Vista Software, Inc.
|
|
* Dirk Behme <dirk.behme@de.bosch.com> - OMAP1510/1610
|
|
* Copyright 2004
|
|
* Copyright 2004-2006 Analog Devices Inc.
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <linux/pm.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/dpmc.h>
|
|
#include <asm/gpio.h>
|
|
|
|
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_H
|
|
#define WAKEUP_TYPE PM_WAKE_HIGH
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_L
|
|
#define WAKEUP_TYPE PM_WAKE_LOW
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_F
|
|
#define WAKEUP_TYPE PM_WAKE_FALLING
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_R
|
|
#define WAKEUP_TYPE PM_WAKE_RISING
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_B
|
|
#define WAKEUP_TYPE PM_WAKE_BOTH_EDGES
|
|
#endif
|
|
|
|
void bfin_pm_suspend_standby_enter(void)
|
|
{
|
|
#ifdef CONFIG_PM_WAKEUP_BY_GPIO
|
|
gpio_pm_wakeup_request(CONFIG_PM_WAKEUP_GPIO_NUMBER, WAKEUP_TYPE);
|
|
#endif
|
|
|
|
#if defined(CONFIG_PM_WAKEUP_BY_GPIO) || defined(CONFIG_PM_WAKEUP_GPIO_API)
|
|
{
|
|
u32 flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
sleep_deeper(gpio_pm_setup()); /*Goto Sleep*/
|
|
|
|
gpio_pm_restore();
|
|
|
|
bfin_write_SIC_IWR(IWR_ENABLE_ALL);
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR)
|
|
sleep_deeper(CONFIG_PM_WAKEUP_SIC_IWR);
|
|
bfin_write_SIC_IWR(IWR_ENABLE_ALL);
|
|
#endif /* CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR */
|
|
}
|
|
|
|
|
|
/*
|
|
* bfin_pm_prepare - Do preliminary suspend work.
|
|
* @state: suspend state we're entering.
|
|
*
|
|
*/
|
|
static int bfin_pm_prepare(suspend_state_t state)
|
|
{
|
|
int error = 0;
|
|
|
|
switch (state) {
|
|
case PM_SUSPEND_STANDBY:
|
|
break;
|
|
|
|
case PM_SUSPEND_MEM:
|
|
return -ENOTSUPP;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* bfin_pm_enter - Actually enter a sleep state.
|
|
* @state: State we're entering.
|
|
*
|
|
*/
|
|
static int bfin_pm_enter(suspend_state_t state)
|
|
{
|
|
switch (state) {
|
|
case PM_SUSPEND_STANDBY:
|
|
bfin_pm_suspend_standby_enter();
|
|
break;
|
|
|
|
case PM_SUSPEND_MEM:
|
|
return -ENOTSUPP;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* bfin_pm_finish - Finish up suspend sequence.
|
|
* @state: State we're coming out of.
|
|
*
|
|
* This is called after we wake back up (or if entering the sleep state
|
|
* failed).
|
|
*/
|
|
static int bfin_pm_finish(suspend_state_t state)
|
|
{
|
|
switch (state) {
|
|
case PM_SUSPEND_STANDBY:
|
|
break;
|
|
|
|
case PM_SUSPEND_MEM:
|
|
return -ENOTSUPP;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct pm_ops bfin_pm_ops = {
|
|
.prepare = bfin_pm_prepare,
|
|
.enter = bfin_pm_enter,
|
|
.finish = bfin_pm_finish,
|
|
};
|
|
|
|
static int __init bfin_pm_init(void)
|
|
{
|
|
pm_set_ops(&bfin_pm_ops);
|
|
return 0;
|
|
}
|
|
|
|
__initcall(bfin_pm_init);
|