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rtc: loongson: clear TOY_MATCH0_REG in loongson_rtc_isr()

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The TOY_MATCH0_REG should be cleared to 0 in the RTC interrupt handler,
otherwise the interrupt cannot be cleared, which will cause the
loongson_rtc_isr() to be triggered multiple times.

The previous code cleared TOY_MATCH0_REG in the loongson_rtc_handler(),
which is an ACPI interrupt. This did not prevent loongson_rtc_isr()
from being triggered multiple times.

This commit moves the clearing of TOY_MATCH0_REG to the
loongson_rtc_isr() to ensure that the interrupt is properly cleared.

Fixes: 1b733a9ebc ("rtc: Add rtc driver for the Loongson family chips")
Signed-off-by: Ming Wang <wangming01@loongson.cn>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Keguang Zhang <keguang.zhang@gmail.com> # on LS1B
Tested-by: Keguang Zhang <keguang.zhang@gmail.com>
Link: https://lore.kernel.org/r/20241205114307.1891418-1-wangming01@loongson.cn
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Ming Wang 2024-12-05 19:43:07 +08:00 • committed by Alexandre Belloni
parent 3ab8c5ed4f
commit 09471d8f5b
1 changed files with 8 additions and 5 deletions
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13
drivers/rtc/rtc-loongson.c
View file

@ -114,6 +114,13 @@ static irqreturn_t loongson_rtc_isr(int irq, void *id)
struct loongson_rtc_priv *priv = (struct loongson_rtc_priv *)id;
rtc_update_irq(priv->rtcdev, 1, RTC_AF | RTC_IRQF);
/*
* The TOY_MATCH0_REG should be cleared 0 here,
* otherwise the interrupt cannot be cleared.
*/
regmap_write(priv->regmap, TOY_MATCH0_REG, 0);
return IRQ_HANDLED;
}
@ -131,11 +138,7 @@ static u32 loongson_rtc_handler(void *id)
writel(RTC_STS, priv->pm_base + PM1_STS_REG);
spin_unlock(&priv->lock);
/*
* The TOY_MATCH0_REG should be cleared 0 here,
* otherwise the interrupt cannot be cleared.
*/
return regmap_write(priv->regmap, TOY_MATCH0_REG, 0);
return ACPI_INTERRUPT_HANDLED;
}
static int loongson_rtc_set_enabled(struct device *dev)