Configure the two accelerometers sharing GPIO line 82 as:
- Open drain so that they can share the same interrupt line.
Configure the corresponding interrupt pin:
- Trigger on the falling edge since open drain implies that we
do not actively drive the line high, but we will actively drive
it low to generate interrupts and then it moves from high to low
i.e. a falling edge.
- Pulled up so the line will be biased to high unless an IRQ
is active on any device on the line, and thus it goes high
again after the interrupt is deasserted.
Cc: linux-iio@xxxxxxxxxxxxxxx
Cc: Jonathan Cameron <jic23@xxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
arch/arm/boot/dts/ste-href-tvk1281618.dtsi | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/arm/boot/dts/ste-href-tvk1281618.dtsi b/arch/arm/boot/dts/ste-href-tvk1281618.dtsi
index 55f9d0cc90f3..4e94a4197b18 100644
--- a/arch/arm/boot/dts/ste-href-tvk1281618.dtsi
+++ b/arch/arm/boot/dts/ste-href-tvk1281618.dtsi
@@ -93,14 +93,15 @@
/* Accelerometer */
compatible = "st,lsm303dlh-accel";
st,drdy-int-pin = <1>;
+ int-pin-open-drain;
reg = <0x18>;
vdd-supply = <&ab8500_ldo_aux1_reg>;
vddio-supply = <&db8500_vsmps2_reg>;
pinctrl-names = "default";
pinctrl-0 = <&accel_tvk_mode>;
interrupt-parent = <&gpio2>;
- interrupts = <18 IRQ_TYPE_EDGE_RISING>,
- <19 IRQ_TYPE_EDGE_RISING>;
+ interrupts = <18 IRQ_TYPE_EDGE_FALLING>,
+ <19 IRQ_TYPE_EDGE_FALLING>;
};
lsm303dlh@1e {
/*
@@ -118,14 +119,15 @@
/* Accelerometer */
compatible = "st,lis331dl-accel";
st,drdy-int-pin = <1>;
+ int-pin-open-drain;
reg = <0x1c>;
vdd-supply = <&ab8500_ldo_aux1_reg>;
vddio-supply = <&db8500_vsmps2_reg>;
pinctrl-names = "default";
pinctrl-0 = <&accel_tvk_mode>;
interrupt-parent = <&gpio2>;
- interrupts = <18 IRQ_TYPE_EDGE_RISING>,
- <19 IRQ_TYPE_EDGE_RISING>;
+ interrupts = <18 IRQ_TYPE_EDGE_FALLING>,
+ <19 IRQ_TYPE_EDGE_FALLING>;
};
ak8974@0f {
/* Magnetometer */
@@ -216,7 +218,7 @@
/* Accelerometer interrupt lines 1 & 2 */
tvk_cfg {
pins = "GPIO82_C1", "GPIO83_D3";
- ste,config = <&gpio_in_pd>;
+ ste,config = <&gpio_in_pu>;
};
};
};
--
2.4.3
--
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