OMAP2+: clockevent: set up GPTIMER clockevent hwmod right before timer init

Set up the GPTIMER hwmod used for the clockevent source immediately
before it is used.  This avoids the need to set up all of the hwmods
until the boot process is further along.  (In general, we want to defer
as much as possible until late in the boot process.)

This second version fixes a bug pointed out by Santosh Shilimkar
<santosh.shilimkar@ti.com>, that would cause the kernel to use an
incorrect timer hwmod name if the selected GPTIMER was not 1 or 12 -
thanks Santosh.  Also, Tarun Kanti DebBarma <tarun.kanti@ti.com>
pointed out that the original patch did not apply cleanly; this has
now been fixed.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Tarun Kanti DebBarma <tarun.kanti@ti.com>

diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
index 7b7c2683ae7bb15cad4a2d32b4eab681884a0864..fb8d656e4d0a4f95a1ae893b7bafd4d215d6459d 100644 (file)
--- a/arch/arm/mach-omap2/timer-gp.c
+++ b/arch/arm/mach-omap2/timer-gp.c
@@ -39,10 +39,11 @@
 #include <asm/mach/time.h>
 #include <plat/dmtimer.h>
 #include <asm/localtimer.h>
+#include <plat/common.h>
+#include <plat/omap_hwmod.h>
 
 #include "timer-gp.h"
 
-#include <plat/common.h>
 
 /* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
 #define MAX_GPTIMER_ID         12
@@ -132,9 +133,13 @@ static void __init omap2_gp_clockevent_init(void)
 {
        u32 tick_rate;
        int src;
+       char clockevent_hwmod_name[8]; /* 8 = sizeof("timerXX0") */
 
        inited = 1;
 
+       sprintf(clockevent_hwmod_name, "timer%d", gptimer_id);
+       omap_hwmod_setup_one(clockevent_hwmod_name);
+
        gptimer = omap_dm_timer_request_specific(gptimer_id);
        BUG_ON(gptimer == NULL);
        gptimer_wakeup = gptimer;