summaryrefslogtreecommitdiffstats
path: root/dts/Bindings/counter/stm32-lptimer-cnt.txt
diff options
context:
space:
mode:
Diffstat (limited to 'dts/Bindings/counter/stm32-lptimer-cnt.txt')
-rw-r--r--dts/Bindings/counter/stm32-lptimer-cnt.txt29
1 files changed, 29 insertions, 0 deletions
diff --git a/dts/Bindings/counter/stm32-lptimer-cnt.txt b/dts/Bindings/counter/stm32-lptimer-cnt.txt
new file mode 100644
index 0000000..e90bc47
--- /dev/null
+++ b/dts/Bindings/counter/stm32-lptimer-cnt.txt
@@ -0,0 +1,29 @@
+STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter
+
+STM32 Low-Power Timer provides several counter modes. It can be used as:
+- quadrature encoder to detect angular position and direction of rotary
+ elements, from IN1 and IN2 input signals.
+- simple counter from IN1 input signal.
+
+Must be a sub-node of an STM32 Low-Power Timer device tree node.
+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". 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.
+
+Example:
+ timer@40002400 {
+ compatible = "st,stm32-lptimer";
+ ...
+ counter {
+ compatible = "st,stm32-lptimer-counter";
+ pinctrl-names = "default", "sleep";
+ pinctrl-0 = <&lptim1_in_pins>;
+ pinctrl-1 = <&lptim1_sleep_in_pins>;
+ };
+ };