Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
Documentation/devicetree/bindings/gpio/gpio-sx150x.txt | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt
index c809acb..02b92ae 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt
@@ -26,6 +26,15 @@ The GPIO expander can optionally be used as an interrupt controller, in
which case it uses the default two cell specifier as described in
Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
+Optional properties:
+
+- semtech,io-polarity: A bit-mask which enables polarity inversion for
+ each IO line in the expander. Setting the bit
+ at position n inverts the polarity of that IO
+ line, while clearing it results in normal
+ polarity. For chips with fewer than 16 IO pins,
+ high-end bits are ignored.
+
Example:
i2c_gpio_expander@20{
--
2.5.5
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