Thread (1 message) 1 message, 1 author, 2017-06-21
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[PATCH 2/2] dt-bindings: iio: imu: st_lsm6dsx: support open drain mode

From: Lorenzo Bianconi <hidden>
Date: 2017-06-21 19:21:29
Also in: linux-iio
Subsystem: iio subsystem and drivers, open firmware and flattened device tree bindings, the rest · Maintainers: Jonathan Cameron, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds

Possibly related (same subject, not in this thread)

Signed-off-by: Lorenzo Bianconi <redacted>
---
 Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt b/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
index 6f28ff55f3ec..1ff1af799c76 100644
--- a/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
+++ b/Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
@@ -11,6 +11,14 @@ Required properties:
 Optional properties:
 - st,drdy-int-pin: the pin on the package that will be used to signal
   "data ready" (valid values: 1 or 2).
+- drive-open-drain: the interrupt/data ready line will be configured
+  as open drain, which is useful if several sensors share the same
+  interrupt line. This is a boolean property.
+  (This binding is taken from pinctrl/pinctrl-bindings.txt)
+  If the requested interrupt is configured as IRQ_TYPE_LEVEL_HIGH or
+  IRQ_TYPE_EDGE_RISING a pull-down resistor is needed to drive the line
+  when it is not active, whereas a pull-up one is needed when interrupt
+  line is configured as IRQ_TYPE_LEVEL_LOW or IRQ_TYPE_EDGE_FALLING.
 - interrupt-parent: should be the phandle for the interrupt controller
 - interrupts: interrupt mapping for IRQ. It should be configured with
   flags IRQ_TYPE_LEVEL_HIGH, IRQ_TYPE_EDGE_RISING, IRQ_TYPE_LEVEL_LOW or
-- 
2.13.1
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