clockevents: fix resume logic

We need to make sure, that the clockevent devices are resumed, before
the tick is resumed. The current resume logic does not guarantee this.

Add CLOCK_EVT_MODE_RESUME and call the set mode functions of the clock
event devices before resuming the tick / oneshot functionality.

Fixup the existing users.

Thanks to Nigel Cunningham for tracking down a long standing thinko,
which affected the jinxed VAIO.

[[email protected]: xen build fix]
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: john stultz <[email protected]>
Cc: Rusty Russell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

arch/arm/mach-davinci/time.c

@@ -285,6 +285,8 @@ static void davinci_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		t->opts = TIMER_OPTS_DISABLED;
 		break;
+	case CLOCK_EVT_MODE_RESUME:
+		break;
 	}
 }
 

arch/arm/mach-imx/time.c

@@ -159,6 +159,7 @@ static void imx_set_mode(enum clock_event_mode mode, struct clock_event_device *
 		break;
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_UNUSED:
+	case CLOCK_EVT_MODE_RESUME:
 		/* Left event sources disabled, no more interrupts appears */
 		break;
 	}

arch/arm/mach-ixp4xx/common.c

@@ -459,6 +459,8 @@ static void ixp4xx_set_mode(enum clock_event_mode mode,
 	default:
 		osrt = opts = 0;
 		break;
+	case CLOCK_EVT_MODE_RESUME:
+		break;
 	}
 
 	*IXP4XX_OSRT1 = osrt | opts;

arch/arm/mach-omap1/time.c

@@ -156,6 +156,7 @@ static void omap_mpu_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
+	case CLOCK_EVT_MODE_RESUME:
 		break;
 	}
 }

arch/arm/plat-omap/timer32k.c

@@ -156,6 +156,8 @@ static void omap_32k_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		omap_32k_timer_stop();
 		break;
+	case CLOCK_EVT_MODE_RESUME:
+		break;
 	}
 }