cfefe3c683
- Add support for irq_wake on system and gpio interrupts - Remove outdated kernel options - Add option to select default PM mode - Fix various places where SIC_IWRx was only handled partially Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
141 lines
3.4 KiB
C
141 lines
3.4 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: Blackfin power management
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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 2004-2008 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/suspend.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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u32 flags;
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local_irq_save(flags);
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bfin_pm_setup();
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#ifdef CONFIG_PM_BFIN_SLEEP_DEEPER
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sleep_deeper(bfin_sic_iwr[0], bfin_sic_iwr[1], bfin_sic_iwr[2]);
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#else
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sleep_mode(bfin_sic_iwr[0], bfin_sic_iwr[1], bfin_sic_iwr[2]);
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#endif
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bfin_pm_restore();
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#if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561)
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bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
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bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
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# ifdef CONFIG_BF54x
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bfin_write_SIC_IWR2(IWR_ENABLE_ALL);
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# endif
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#else
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bfin_write_SIC_IWR(IWR_ENABLE_ALL);
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#endif
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local_irq_restore(flags);
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}
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/*
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* bfin_pm_valid - Tell the PM core that we only support the standby sleep
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* state
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* @state: suspend state we're checking.
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*
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*/
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static int bfin_pm_valid(suspend_state_t state)
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{
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return (state == PM_SUSPEND_STANDBY);
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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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struct platform_suspend_ops bfin_pm_ops = {
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.enter = bfin_pm_enter,
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.valid = bfin_pm_valid,
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};
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static int __init bfin_pm_init(void)
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{
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suspend_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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