dt-bindings: iio: stm32-lptimer-counter: document pinctrl sleep state

Add documentation for optional pinctrl sleep state that can be used by
STM32 LPTimer encoder/counter.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt b/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt
index a04aa5c..e90bc47 100644 (file)
--- a/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt
+++ b/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt
@@ -10,8 +10,9 @@ See ../mfd/stm32-lptimer.txt for details about the parent node.
 
 Required properties:
 - compatible:          Must be "st,stm32-lptimer-counter".
-- pinctrl-names:       Set to "default".
-- pinctrl-0:           List of phandles pointing to pin configuration nodes,
+- pinctrl-names:       Set to "default". An additional "sleep" state can be
+                       defined to set pins in sleep state.
+- pinctrl-n:           List of phandles pointing to pin configuration nodes,
                        to set IN1/IN2 pins in mode of operation for Low-Power
                        Timer input on external pin.
 
@@ -21,7 +22,8 @@ Example:
                ...
                counter {
                        compatible = "st,stm32-lptimer-counter";
-                       pinctrl-names = "default";
+                       pinctrl-names = "default", "sleep";
                        pinctrl-0 = <&lptim1_in_pins>;
+                       pinctrl-1 = <&lptim1_sleep_in_pins>;
                };
        };