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