From 21d841b2a417bfe4cce9b1266bb851ba0da89d37 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Mon, 17 Jul 2017 19:39:04 +0200 Subject: [PATCH] dt-bindings: iio: humidity: hts221: support open drain mode Signed-off-by: Lorenzo Bianconi Acked-by: Rob Herring Signed-off-by: Jonathan Cameron --- Documentation/devicetree/bindings/iio/humidity/hts221.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/humidity/hts221.txt b/Documentation/devicetree/bindings/iio/humidity/hts221.txt index fca263e13400..10adeb0d703d 100644 --- a/Documentation/devicetree/bindings/iio/humidity/hts221.txt +++ b/Documentation/devicetree/bindings/iio/humidity/hts221.txt @@ -5,6 +5,14 @@ Required properties: - reg: i2c address of the sensor / spi cs line Optional properties: +- 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. + 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. + Refer to pinctrl/pinctrl-bindings.txt for the property description. - 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 -- 2.20.1