Merge tag 'timers-urgent-2020-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer updates from Thomas Gleixner:
 "A set of clocksource/clockevents updates:

   - Reset the TI/DM timer before enabling it instead of doing it the
     other way round.

   - Initialize the reload value for the GX6605s timer correctly so the
     hardware counter starts at 0 again after overrun.

   - Make error return value negative in the h8300 timer init function"

* tag 'timers-urgent-2020-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/timer-gx6605s: Fixup counter reload
  clocksource/drivers/timer-ti-dm: Do reset before enable
  clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init()

Author: torvalds

drivers/clocksource/h8300_timer8.c

@@ -169,7 +169,7 @@ static int __init h8300_8timer_init(struct device_node *node)
 		return PTR_ERR(clk);
 	}
 
-	ret = ENXIO;
+	ret = -ENXIO;
 	base = of_iomap(node, 0);
 	if (!base) {
 		pr_err("failed to map registers for clockevent\n");

drivers/clocksource/timer-gx6605s.c

@@ -28,6 +28,7 @@ static irqreturn_t gx6605s_timer_interrupt(int irq, void *dev)
 	void __iomem *base = timer_of_base(to_timer_of(ce));
 
 	writel_relaxed(GX6605S_STATUS_CLR, base + TIMER_STATUS);
+	writel_relaxed(0, base + TIMER_INI);
 
 	ce->event_handler(ce);
 

drivers/clocksource/timer-ti-dm-systimer.c

@@ -69,12 +69,33 @@ static bool dmtimer_systimer_revision1(struct dmtimer_systimer *t)
 	return !(tidr >> 16);
 }
 
+static void dmtimer_systimer_enable(struct dmtimer_systimer *t)
+{
+	u32 val;
+
+	if (dmtimer_systimer_revision1(t))
+		val = DMTIMER_TYPE1_ENABLE;
+	else
+		val = DMTIMER_TYPE2_ENABLE;
+
+	writel_relaxed(val, t->base + t->sysc);
+}
+
+static void dmtimer_systimer_disable(struct dmtimer_systimer *t)
+{
+	if (!dmtimer_systimer_revision1(t))
+		return;
+
+	writel_relaxed(DMTIMER_TYPE1_DISABLE, t->base + t->sysc);
+}
+
 static int __init dmtimer_systimer_type1_reset(struct dmtimer_systimer *t)
 {
 	void __iomem *syss = t->base + OMAP_TIMER_V1_SYS_STAT_OFFSET;
 	int ret;
 	u32 l;
 
+	dmtimer_systimer_enable(t);
 	writel_relaxed(BIT(1) | BIT(2), t->base + t->ifctrl);
 	ret = readl_poll_timeout_atomic(syss, l, l & BIT(0), 100,
 					DMTIMER_RESET_WAIT);
@@ -88,6 +109,7 @@ static int __init dmtimer_systimer_type2_reset(struct dmtimer_systimer *t)
 	void __iomem *sysc = t->base + t->sysc;
 	u32 l;
 
+	dmtimer_systimer_enable(t);
 	l = readl_relaxed(sysc);
 	l |= BIT(0);
 	writel_relaxed(l, sysc);
@@ -336,26 +358,6 @@ static int __init dmtimer_systimer_init_clock(struct dmtimer_systimer *t,
 	return 0;
 }
 
-static void dmtimer_systimer_enable(struct dmtimer_systimer *t)
-{
-	u32 val;
-
-	if (dmtimer_systimer_revision1(t))
-		val = DMTIMER_TYPE1_ENABLE;
-	else
-		val = DMTIMER_TYPE2_ENABLE;
-
-	writel_relaxed(val, t->base + t->sysc);
-}
-
-static void dmtimer_systimer_disable(struct dmtimer_systimer *t)
-{
-	if (!dmtimer_systimer_revision1(t))
-		return;
-
-	writel_relaxed(DMTIMER_TYPE1_DISABLE, t->base + t->sysc);
-}
-
 static int __init dmtimer_systimer_setup(struct device_node *np,
 					 struct dmtimer_systimer *t)
 {
@@ -409,8 +411,8 @@ static int __init dmtimer_systimer_setup(struct device_node *np,
 	t->wakeup = regbase + _OMAP_TIMER_WAKEUP_EN_OFFSET;
 	t->ifctrl = regbase + _OMAP_TIMER_IF_CTRL_OFFSET;
 
-	dmtimer_systimer_enable(t);
 	dmtimer_systimer_reset(t);
+	dmtimer_systimer_enable(t);
 	pr_debug("dmtimer rev %08x sysc %08x\n", readl_relaxed(t->base),
 		 readl_relaxed(t->base + t->sysc));