[Letux-kernel] [PATCH RESEND] mfd: rn5t618: fix IRQ trigger by changing it to level mode

Andreas Kemnade andreas at kemnade.info
Sat May 15 22:55:18 CEST 2021

During more massive generation of interrupts, the IRQ got stuck,
and the subdevices did not see any new interrupts. That happens
especially at wonky USB supply in combination with ADC reads.
To fix that trigger the IRQ at level low instead of falling edge.

Fixes: 0c81604516af ("mfd: rn5t618: Add IRQ support")
Signed-off-by: Andreas Kemnade <andreas at kemnade.info>
 drivers/mfd/rn5t618.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
index ecddd7b6500e..a852eef1f4d2 100644
--- a/drivers/mfd/rn5t618.c
+++ b/drivers/mfd/rn5t618.c
@@ -109,7 +109,7 @@ static int rn5t618_irq_init(struct rn5t618 *rn5t618)
 	ret = devm_regmap_add_irq_chip(rn5t618->dev, rn5t618->regmap,
 				       0, irq_chip, &rn5t618->irq_data);
 	if (ret)
 		dev_err(rn5t618->dev, "Failed to register IRQ chip\n");

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