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authorKrzysztof Kozlowski <krzk@kernel.org>2021-06-02 14:04:43 +0300
committerLee Jones <lee.jones@linaro.org>2021-11-05 17:40:06 +0300
commit215e50b0864678e2fd765a8d57ae9aec713156c4 (patch)
tree82dfad5d5a45dcfb96598d0850a11a231ba98c45 /drivers/mfd
parent6854a10526f88ad79c7a648697ec656af1d5da1a (diff)
downloadlinux-215e50b0864678e2fd765a8d57ae9aec713156c4.tar.xz
mfd: max77686: Do not enforce (incorrect) interrupt trigger type
Interrupt line can be configured on different hardware in different way, even inverted. Therefore driver should not enforce specific trigger type - edge falling - but instead rely on Devicetree to configure it. The Maxim 77686 datasheet describes the interrupt line as active low with a requirement of acknowledge from the CPU therefore the edge falling is not correct. The interrupt line is shared between PMIC and RTC driver, so using level sensitive interrupt is here especially important to avoid races. With an edge configuration in case if first PMIC signals interrupt followed shortly after by the RTC, the interrupt might not be yet cleared/acked thus the second one would not be noticed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20210602110445.33536-2-krzysztof.kozlowski@canonical.com
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/max77686.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index 2ad554b921d9..f9e12ab2bc75 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -209,8 +209,7 @@ static int max77686_i2c_probe(struct i2c_client *i2c)
ret = devm_regmap_add_irq_chip(&i2c->dev, max77686->regmap,
max77686->irq,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
- IRQF_SHARED, 0, irq_chip,
+ IRQF_ONESHOT | IRQF_SHARED, 0, irq_chip,
&max77686->irq_data);
if (ret < 0) {
dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);