Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/humidity/hts221.txt b/Documentation/devicetree/bindings/iio/humidity/hts221.txt
new file mode 100644
index 000000000..84d029372
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/humidity/hts221.txt
@@ -0,0 +1,30 @@
+* HTS221 STM humidity + temperature sensor
+
+Required properties:
+- compatible: should be "st,hts221"
+- 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.
+- interrupts: interrupt mapping for IRQ. It should be configured with
+  flags IRQ_TYPE_LEVEL_HIGH, IRQ_TYPE_EDGE_RISING, IRQ_TYPE_LEVEL_LOW or
+  IRQ_TYPE_EDGE_FALLING.
+
+  Refer to interrupt-controller/interrupts.txt for generic interrupt
+  client node bindings.
+
+Example:
+
+hts221@5f {
+	compatible = "st,hts221";
+	reg = <0x5f>;
+	interrupt-parent = <&gpio0>;
+	interrupts = <0 IRQ_TYPE_EDGE_RISING>;
+};