[PATCH 7/8] dt-bindings: iio: Add STM32 LPTimer quadrature encoder and counter
From: Fabrice Gasnier <hidden>
Date: 2017-06-16 16:01:48
Also in:
linux-devicetree, linux-iio, linux-pwm, lkml
Subsystem:
iio subsystem and drivers, open firmware and flattened device tree bindings, stm32 timer/lptimer drivers, the rest · Maintainers:
Jonathan Cameron, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Fabrice Gasnier, Linus Torvalds
Add documentation for STMicroelectronics STM32 Low Power Timer quadrature encoder and counter binding. Signed-off-by: Fabrice Gasnier <redacted> --- .../bindings/iio/counter/stm32-lptimer-cnt.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt
diff --git a/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt b/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt
new file mode 100644
index 0000000..e31e54d
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt@@ -0,0 +1,25 @@ +STMicroelectronics STM32 Low Power Timer quadrature encoder and counter + +STM32 LP 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 LP Timer device tree node. +See ../mfd/stm32-lptimer.txt for details about the parent node. + +Required properties: +- compatible: Must be "st,stm32-lptimer-counter". +- A pinctrl state named "default" can be defined to set IN1/IN2 pins in mode + of operation for LP Timer input signals on external pin. + +Example: + lptimer1: lptimer at 0x40002400 { + compatible = "st,stm32-lptimer"; + ... + counter { + compatible = "st,stm32-lptimer-counter"; + pinctrl-names = "default"; + pinctrl-0 = <&lptim1_in_pins>; + }; + };
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1.9.1