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authorKrzysztof Kozlowski <krzk@kernel.org>2021-05-26 20:20:35 +0300
committerSebastian Reichel <sebastian.reichel@collabora.com>2021-06-04 12:58:22 +0300
commit7fbf6b731bca347700e460d94b130f9d734b33e9 (patch)
treeccdea4e431726913ca2f60b779d915bb2384a35d /drivers/power
parentb49a81d0fd021a1f0c8660fa40ad9984d9d1f5b7 (diff)
downloadlinux-7fbf6b731bca347700e460d94b130f9d734b33e9.tar.xz
power: supply: max17042: 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 17047/77693 datasheets describe 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> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/max17042_battery.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c
index 1d7326cd8fc6..ce2041b30a06 100644
--- a/drivers/power/supply/max17042_battery.c
+++ b/drivers/power/supply/max17042_battery.c
@@ -1104,7 +1104,7 @@ static int max17042_probe(struct i2c_client *client,
}
if (client->irq) {
- unsigned int flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
+ unsigned int flags = IRQF_ONESHOT;
/*
* On ACPI systems the IRQ may be handled by ACPI-event code,