ARM: OMAP: Add DMTIMER definitions for posted mode

For OMAP2+ devices, when using DMTIMERs for system timers (clock-events and
clock-source) the posted mode configuration of the timers is used. To allow
the compiler to optimise the functions for configuring and reading the system
timers, the posted flag variable is hard-coded with the value 1. To make it
clear that posted mode is being used add some definitions so that it is more
readable.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

2 files changed, 14 insertions, 7 deletions

diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 684d2fc3d485..a135d28e202c 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -108,7 +108,7 @@ static int omap2_gp_timer_set_next_event(unsigned long cycles,
                                          struct clock_event_device *evt)
 {
         __omap_dm_timer_load_start(&clkev, OMAP_TIMER_CTRL_ST,
-                                                0xffffffff - cycles, 1);
+                                   0xffffffff - cycles, OMAP_TIMER_POSTED);
 
         return 0;
 }
@@ -118,7 +118,7 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
 {
         u32 period;
 
-        __omap_dm_timer_stop(&clkev, 1, clkev.rate);
+        __omap_dm_timer_stop(&clkev, OMAP_TIMER_POSTED, clkev.rate);
 
         switch (mode) {
         case CLOCK_EVT_MODE_PERIODIC:
@@ -126,10 +126,10 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
                 period -= 1;
                 /* Looks like we need to first set the load value separately */
                 __omap_dm_timer_write(&clkev, OMAP_TIMER_LOAD_REG,
-                                        0xffffffff - period, 1);
+                                      0xffffffff - period, OMAP_TIMER_POSTED);
                 __omap_dm_timer_load_start(&clkev,
                                         OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
-                                                0xffffffff - period, 1);
+                                        0xffffffff - period, OMAP_TIMER_POSTED);
                 break;
         case CLOCK_EVT_MODE_ONESHOT:
                 break;
@@ -359,7 +359,8 @@ static bool use_gptimer_clksrc;
  */
 static cycle_t clocksource_read_cycles(struct clocksource *cs)
 {
-        return (cycle_t)__omap_dm_timer_read_counter(&clksrc, 1);
+        return (cycle_t)__omap_dm_timer_read_counter(&clksrc,
+                                                     OMAP_TIMER_POSTED);
 }
 
 static struct clocksource clocksource_gpt = {
@@ -373,7 +374,8 @@ static struct clocksource clocksource_gpt = {
 static u32 notrace dmtimer_read_sched_clock(void)
 {
         if (clksrc.reserved)
-                return __omap_dm_timer_read_counter(&clksrc, 1);
+                return __omap_dm_timer_read_counter(&clksrc,
+                                                    OMAP_TIMER_POSTED);
 
         return 0;
 }
@@ -455,7 +457,8 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
         BUG_ON(res);
 
         __omap_dm_timer_load_start(&clksrc,
-                        OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0, 1);
+                                   OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0,
+                                   OMAP_TIMER_POSTED);
         setup_sched_clock(dmtimer_read_sched_clock, 32, clksrc.rate);
 
         if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index f8943c8f9dbf..1bee0ac88760 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -55,6 +55,10 @@
 #define OMAP_TIMER_TRIGGER_OVERFLOW             0x01
 #define OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE 0x02
 
+/* posted mode types */
+#define OMAP_TIMER_NONPOSTED                    0x00
+#define OMAP_TIMER_POSTED                       0x01
+
 /* timer capabilities used in hwmod database */
 #define OMAP_TIMER_SECURE                               0x80000000
 #define OMAP_TIMER_ALWON                                0x40000000