From a83c0b739f3ad1887704cfa9f1ee5ee208cf1532 Mon Sep 17 00:00:00 2001 From: Francesco VIRLINZI Date: Wed, 11 Mar 2009 10:39:02 +0000 Subject: [PATCH] sh: PMB hibernation support This implements preliminary suspend/resume support for the PMB. Signed-off-by: Francesco Virlinzi Signed-off-by: Paul Mundt --- arch/sh/mm/pmb.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 84241676265e..b1a714a92b14 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -15,6 +15,8 @@ */ #include #include +#include +#include #include #include #include @@ -402,3 +404,39 @@ static int __init pmb_debugfs_init(void) return 0; } postcore_initcall(pmb_debugfs_init); + +#ifdef CONFIG_PM +static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state) +{ + static pm_message_t prev_state; + + /* Restore the PMB after a resume from hibernation */ + if (state.event == PM_EVENT_ON && + prev_state.event == PM_EVENT_FREEZE) { + struct pmb_entry *pmbe; + spin_lock_irq(&pmb_list_lock); + for (pmbe = pmb_list; pmbe; pmbe = pmbe->next) + set_pmb_entry(pmbe); + spin_unlock_irq(&pmb_list_lock); + } + prev_state = state; + return 0; +} + +static int pmb_sysdev_resume(struct sys_device *dev) +{ + return pmb_sysdev_suspend(dev, PMSG_ON); +} + +static struct sysdev_driver pmb_sysdev_driver = { + .suspend = pmb_sysdev_suspend, + .resume = pmb_sysdev_resume, +}; + +static int __init pmb_sysdev_init(void) +{ + return sysdev_driver_register(&cpu_sysdev_class, &pmb_sysdev_driver); +} + +subsys_initcall(pmb_sysdev_init); +#endif