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OMAP: PM noop: implement context loss count for non-omap_devices

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For devices which have not (yet) been converted to use omap_device,
implement the context loss counter using the "brutal method" as
originally proposed by Paul Walmsley[1].

The dummy context loss counter is incremented every time it is
checked, but only when off-mode is enabled.  When off-mode is
disabled, the dummy counter stops incrementing.

Tested on 36xx/Zoom3 using MMC driver, which is currently the
only in-tree user of this API.

This patch should be reverted after all devices are converted to using
omap_device.

[1] http://marc.info/?l=linux-omap&m=129176260000626&w=2

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
[paul@pwsan.com: fixed compile warning; fixed to compile on OMAP1]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Kevin Hilman
2010-12-21 21:31:55 -07:00
committed by Paul Walmsley
parent c80705aa70
commit 6081dc348f
3 changed files with 52 additions and 1 deletions
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5
arch/arm/mach-omap2/pm-debug.c
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@ -32,6 +32,7 @@
#include "powerdomain.h"
#include "clockdomain.h"
#include <plat/dmtimer.h>
#include <plat/omap-pm.h>
#include "cm2xxx_3xxx.h"
#include "prm2xxx_3xxx.h"
@ -581,6 +582,10 @@ static int option_set(void *data, u64 val)
*option = val;
if (option == &enable_off_mode) {
if (val)
omap_pm_enable_off_mode();
else
omap_pm_disable_off_mode();
if (cpu_is_omap34xx())
omap3_pm_off_mode_enable(val);
}