[PATCH 5.13 158/351] power: supply: max17040: Do not enforce (incorrect) interrupt trigger type

Greg Kroah-Hartman
2021-07-19T17:36:47Z

From: Krzysztof Kozlowski <krzk@kernel.org>

[ Upstream commit 8bb2314fc22628333d89df83d695ff9a8d2a6eac ]

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 14577/77836 datasheets describe the interrupt line as active
low with a requirement of acknowledge from the CPU therefore the edge
falling is not correct.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Iskren Chernev <iskren.chernev@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../devicetree/bindings/power/supply/maxim,max17040.yaml | 2 +-
drivers/power/supply/max17040_battery.c | 4 +---
2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/supply/maxim,max17040.yaml b/Documentation/devicetree/bindings/power/supply/maxim,max17040.yaml
index de91cf3f058c..f792d06db413 100644
--- a/Documentation/devicetree/bindings/power/supply/maxim,max17040.yaml
+++ b/Documentation/devicetree/bindings/power/supply/maxim,max17040.yaml
@@ -89,7 +89,7 @@ examples:
reg = <0x36>;
maxim,alert-low-soc-level = <10>;
interrupt-parent = <&gpio7>;
- interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+ interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
wakeup-source;
};
};
diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index 1aab868adabf..e80dd9141ae7 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c
@@ -361,12 +361,10 @@ static irqreturn_t max17040_thread_handler(int id, void *dev)
static int max17040_enable_alert_irq(struct max17040_chip *chip)
{
struct i2c_client *client = chip->client;
- unsigned int flags;
int ret;

- flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
- max17040_thread_handler, flags,
+ max17040_thread_handler, IRQF_ONESHOT,
chip->battery->desc->name, chip);

return ret;
--
2.30.2