From: Krzysztof Kozlowski krzk@kernel.org
stable inclusion from stable-5.10.52 commit efc6443c1abea67bdfbbe72f07e0f879b97baeed bugzilla: 175542 https://gitee.com/openeuler/kernel/issues/I4DTKU
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 7fbf6b731bca347700e460d94b130f9d734b33e9 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/power/supply/max17042_battery.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index 2e9672fe4df1..794caf03658d 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -1094,7 +1094,7 @@ 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,