Commit 61d73044 authored by James Hogan's avatar James Hogan Committed by Paul Burton
Browse files

MIPS: c-r4k: Add CPU PM callback for coherency 



Implement a CPU power management callback for the r4k cache, to set up
coherency again after leaving a powered down state.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
parent ae4ce454

arch/mips/mm/c-r4k.c

+24 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
 * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Ralf Baechle (ralf@gnu.org)

 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.

 */

#include <linux/cpu_pm.h>

#include <linux/hardirq.h>

#include <linux/init.h>

#include <linux/highmem.h>
@@ -1644,3 +1645,26 @@ void r4k_cache_init(void) 
	coherency_setup();

	board_cache_error_setup = r4k_cache_error_setup;

}



static int r4k_cache_pm_notifier(struct notifier_block *self, unsigned long cmd,

			       void *v)

{

	switch (cmd) {

	case CPU_PM_ENTER_FAILED:

	case CPU_PM_EXIT:

		coherency_setup();

		break;

	}



	return NOTIFY_OK;

}



static struct notifier_block r4k_cache_pm_notifier_block = {

	.notifier_call = r4k_cache_pm_notifier,

};



int __init r4k_cache_init_pm(void)

{

	return cpu_pm_register_notifier(&r4k_cache_pm_notifier_block);

}

arch_initcall(r4k_cache_init_pm);