linux-kernel - [PATCH] clocksource/drivers/fttmr010: Clear also overflow bit on AST2600

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Date:   Sun, 25 Jul 2021 01:13:32 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Cédric Le Goater <clg@...d.org>,
        Joel Stanley <joel@....id.au>
Subject: [PATCH] clocksource/drivers/fttmr010: Clear also overflow bit on AST2600

The code was originally just writing 0x1 into TIMER_INTR_STATE
on the AST2600. But that is just the bit for TIMER_1_INT_MATCH1
so if we're using periodic IRQs we also need to clear
TIMER_1_INT_OVERFLOW.

Cc: Cédric Le Goater <clg@...d.org>
Cc: Joel Stanley <joel@....id.au>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
This patch goes on top of the other two I just sent.
---
 drivers/clocksource/timer-fttmr010.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c
index de29d424ec95..24f62698d17f 100644
--- a/drivers/clocksource/timer-fttmr010.c
+++ b/drivers/clocksource/timer-fttmr010.c
@@ -275,7 +275,8 @@ static irqreturn_t ast2600_timer_interrupt(int irq, void *dev_id)
 
 	val = readl(fttmr010->base + TIMER_INTR_STATE);
 	if (val & (TIMER_1_INT_MATCH1 | TIMER_1_INT_OVERFLOW)) {
-		writel(TIMER_1_INT_MATCH1, fttmr010->base + TIMER_INTR_STATE);
+		writel(TIMER_1_INT_MATCH1 | TIMER_1_INT_OVERFLOW,
+		       fttmr010->base + TIMER_INTR_STATE);
 		evt->event_handler(evt);
 	} else {
 		/* Just clear any spurious IRQs from the block */
-- 
2.31.1