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omap: Use getnstimeofday for omap_device

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Use getnstimeofday for omap_device

Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2009-10-19 15:25:24 -07:00
parent 986a13f508
commit f059429ea0
1 changed files with 19 additions and 31 deletions
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50
arch/arm/plat-omap/omap_device.c
View file

@ -102,21 +102,6 @@
/* Private functions */
/**
* _read_32ksynct - read the OMAP 32K sync timer
*
* Returns the current value of the 32KiHz synchronization counter.
* XXX this should be generalized to simply read the system clocksource.
* XXX this should be moved to a separate synctimer32k.c file
*/
static u32 _read_32ksynct(void)
{
if (!cpu_class_is_omap2())
BUG();
return __raw_readl(OMAP2_IO_ADDRESS(OMAP_32KSYNCT_BASE + 0x010));
}
/**
* _omap_device_activate - increase device readiness
* @od: struct omap_device *
@ -133,13 +118,13 @@ static u32 _read_32ksynct(void)
*/
static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
{
u32 a, b;
struct timespec a, b, c;
pr_debug("omap_device: %s: activating\n", od->pdev.name);
while (od->pm_lat_level > 0) {
struct omap_device_pm_latency *odpl;
int act_lat = 0;
unsigned long long act_lat = 0;
od->pm_lat_level--;
@ -149,20 +134,22 @@ static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
(od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit))
break;
a = _read_32ksynct();
getnstimeofday(&a);
/* XXX check return code */
odpl->activate_func(od);
b = _read_32ksynct();
getnstimeofday(&b);
act_lat = (b - a) >> 15; /* 32KiHz cycles to microseconds */
c = timespec_sub(b, a);
act_lat = timespec_to_ns(&c) * NSEC_PER_USEC;
pr_debug("omap_device: %s: pm_lat %d: activate: elapsed time "
"%d usec\n", od->pdev.name, od->pm_lat_level, act_lat);
"%llu usec\n", od->pdev.name, od->pm_lat_level,
act_lat);
WARN(act_lat > odpl->activate_lat, "omap_device: %s.%d: "
"activate step %d took longer than expected (%d > %d)\n",
"activate step %d took longer than expected (%llu > %d)\n",
od->pdev.name, od->pdev.id, od->pm_lat_level,
act_lat, odpl->activate_lat);
@ -188,13 +175,13 @@ static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
*/
static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat)
{
u32 a, b;
struct timespec a, b, c;
pr_debug("omap_device: %s: deactivating\n", od->pdev.name);
while (od->pm_lat_level < od->pm_lats_cnt) {
struct omap_device_pm_latency *odpl;
int deact_lat = 0;
unsigned long long deact_lat = 0;
odpl = od->pm_lats + od->pm_lat_level;
@ -203,23 +190,24 @@ static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat)
od->_dev_wakeup_lat_limit))
break;
a = _read_32ksynct();
getnstimeofday(&a);
/* XXX check return code */
odpl->deactivate_func(od);
b = _read_32ksynct();
getnstimeofday(&b);
deact_lat = (b - a) >> 15; /* 32KiHz cycles to microseconds */
c = timespec_sub(b, a);
deact_lat = timespec_to_ns(&c) * NSEC_PER_USEC;
pr_debug("omap_device: %s: pm_lat %d: deactivate: elapsed time "
"%d usec\n", od->pdev.name, od->pm_lat_level,
"%llu usec\n", od->pdev.name, od->pm_lat_level,
deact_lat);
WARN(deact_lat > odpl->deactivate_lat, "omap_device: %s.%d: "
"deactivate step %d took longer than expected (%d > %d)\n",
od->pdev.name, od->pdev.id, od->pm_lat_level,
deact_lat, odpl->deactivate_lat);
"deactivate step %d took longer than expected "
"(%llu > %d)\n", od->pdev.name, od->pdev.id,
od->pm_lat_level, deact_lat, odpl->deactivate_lat);
od->dev_wakeup_lat += odpl->activate_lat;