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authorKrzysztof Kozlowski <krzk@kernel.org>2021-06-02 14:04:44 +0300
committerLee Jones <lee.jones@linaro.org>2021-11-05 17:40:06 +0300
commitf5f082eb0486365deab279bb226acdc3f08306b0 (patch)
tree5ca365bb93519e59ddc0a1fbaf8ad0f7cf4a2214 /drivers/mfd
parent215e50b0864678e2fd765a8d57ae9aec713156c4 (diff)
downloadlinux-f5f082eb0486365deab279bb226acdc3f08306b0.tar.xz
mfd: max77693: 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 77693 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/20210602110445.33536-3-krzysztof.kozlowski@canonical.com
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/max77693.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c
index 596ed85cab3b..4e6244e17559 100644
--- a/drivers/mfd/max77693.c
+++ b/drivers/mfd/max77693.c
@@ -222,8 +222,7 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
- IRQF_ONESHOT | IRQF_SHARED |
- IRQF_TRIGGER_FALLING, 0,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
&max77693_led_irq_chip,
&max77693->irq_data_led);
if (ret) {
@@ -232,8 +231,7 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
- IRQF_ONESHOT | IRQF_SHARED |
- IRQF_TRIGGER_FALLING, 0,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
&max77693_topsys_irq_chip,
&max77693->irq_data_topsys);
if (ret) {
@@ -242,8 +240,7 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
- IRQF_ONESHOT | IRQF_SHARED |
- IRQF_TRIGGER_FALLING, 0,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
&max77693_charger_irq_chip,
&max77693->irq_data_chg);
if (ret) {
@@ -252,8 +249,7 @@ static int max77693_i2c_probe(struct i2c_client *i2c,
}
ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
- IRQF_ONESHOT | IRQF_SHARED |
- IRQF_TRIGGER_FALLING, 0,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
&max77693_muic_irq_chip,
&max77693->irq_data_muic);
if (ret) {