omap: Use getnstimeofday for omap_device

Use getnstimeofday for omap_device

Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 19 insertions, 31 deletions

diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 2c409fc6dd21..12513f493daf 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -103,21 +103,6 @@
 /* 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 *
  * @ignore_lat: increase to latency target (0) or full readiness (1)?
@@ -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;