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Commit a9f73632 authored by Keerthy's avatar Keerthy Committed by Tony Lindgren
Browse files

ARM: OMAP2+: prm44xx: Inroduce cpu_pm notifiers for context save/restore 



Inroduce cpu_pm notifiers for context save/restore. This will be
needed for am43xx family in case of rtc only mode with ddr in
self-refresh.

Signed-off-by: default avatarKeerthy <j-keerthy@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent e37fbf05

arch/arm/mach-omap2/prm44xx.c

+25 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
 * published by the Free Software Foundation.

 */



#include <linux/cpu_pm.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/errno.h>
@@ -30,6 +31,7 @@ 
#include "prcm44xx.h"

#include "prminst44xx.h"

#include "powerdomain.h"

#include "pm.h"



/* Static data */
@@ -768,6 +770,22 @@ void prm_restore_context(void) 
				 omap4_prcm_irq_setup.pm_ctrl);

}



static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v)

{

	switch (cmd) {

	case CPU_CLUSTER_PM_ENTER:

		if (enable_off_mode)

			prm_save_context();

		break;

	case CPU_CLUSTER_PM_EXIT:

		if (enable_off_mode)

			prm_restore_context();

		break;

	}



	return NOTIFY_OK;

}



/*

 * XXX document

 */
@@ -788,6 +806,7 @@ static const struct omap_prcm_init_data *prm_init_data; 


int __init omap44xx_prm_init(const struct omap_prcm_init_data *data)

{

	static struct notifier_block nb;

	omap_prm_base_init();



	prm_init_data = data;
@@ -809,6 +828,12 @@ int __init omap44xx_prm_init(const struct omap_prcm_init_data *data) 
		omap4_prcm_irq_setup.mask = AM43XX_PRM_IRQENABLE_MPU_OFFSET;

	}



	/* Only AM43XX can lose prm context during rtc-ddr suspend */

	if (soc_is_am43xx()) {

		nb.notifier_call = cpu_notifier;

		cpu_pm_register_notifier(&nb);

	}



	return prm_register(&omap44xx_prm_ll_data);

}