Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a83c0b73 authored by Francesco VIRLINZI's avatar Francesco VIRLINZI Committed by Paul Mundt
Browse files

sh: PMB hibernation support



This implements preliminary suspend/resume support for the PMB.

Signed-off-by: default avatarFrancesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 039a718e
Loading
Loading
Loading
Loading
+38 −0
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/bitops.h>
@@ -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