ARM: OMAP: Fix clockevent support for hrtimers

One-shot mode was broken in MPU-timer support for OMAP1 due to a typo.

Also, ensure timer is stopped before changing the auto-reload flag.
The TRM says changing the AR flag when timer is running is undefined.

Also set GENERIC_CLOCKEVENTS for all omaps.

Signed-off-by: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

3 files changed, 10 insertions, 2 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 955fc53c1c01..4039a133006e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -469,6 +469,7 @@ config ARCH_OMAP
         bool "TI OMAP"
         select GENERIC_GPIO
         select GENERIC_TIME
+        select GENERIC_CLOCKEVENTS
         help
           Support for TI's OMAP platform (OMAP1 and OMAP2).
 
diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c
index 237651ebae5d..572a2dbc72ab 100644
--- a/arch/arm/mach-omap1/time.c
+++ b/arch/arm/mach-omap1/time.c
@@ -132,13 +132,20 @@ static inline void omap_mpu_timer_start(int nr, unsigned long load_val,
         timer->cntl = timerflags;
 }
 
+static inline void omap_mpu_timer_stop(int nr)
+{
+        volatile omap_mpu_timer_regs_t* timer = omap_mpu_timer_base(nr);
+
+        timer->cntl &= ~MPU_TIMER_ST;
+}
+
 /*
  * ---------------------------------------------------------------------------
  * MPU timer 1 ... count down to zero, interrupt, reload
  * ---------------------------------------------------------------------------
  */
 static int omap_mpu_set_next_event(unsigned long cycles,
-                                    struct clock_event_device *evt)
+                                   struct clock_event_device *evt)
 {
         omap_mpu_timer_start(0, cycles, 0);
         return 0;
@@ -152,6 +159,7 @@ static void omap_mpu_set_mode(enum clock_event_mode mode,
                 omap_mpu_set_autoreset(0);
                 break;
         case CLOCK_EVT_MODE_ONESHOT:
+                omap_mpu_timer_stop(0);
                 omap_mpu_remove_autoreset(0);
                 break;
         case CLOCK_EVT_MODE_UNUSED:
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index c1f7e5a819a3..b917206ee906 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -11,7 +11,6 @@ choice
 
 config ARCH_OMAP1
         bool "TI OMAP1"
-        select GENERIC_CLOCKEVENTS
 
 config ARCH_OMAP2
         bool "TI OMAP2"