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30 lines
1021 B
Plaintext
30 lines
1021 B
Plaintext
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STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter
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STM32 Low-Power Timer provides several counter modes. It can be used as:
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- quadrature encoder to detect angular position and direction of rotary
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elements, from IN1 and IN2 input signals.
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- simple counter from IN1 input signal.
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Must be a sub-node of an STM32 Low-Power Timer device tree node.
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See ../mfd/stm32-lptimer.txt for details about the parent node.
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Required properties:
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- compatible: Must be "st,stm32-lptimer-counter".
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- pinctrl-names: Set to "default". An additional "sleep" state can be
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defined to set pins in sleep state.
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- pinctrl-n: List of phandles pointing to pin configuration nodes,
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to set IN1/IN2 pins in mode of operation for Low-Power
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Timer input on external pin.
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Example:
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timer@40002400 {
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compatible = "st,stm32-lptimer";
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...
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counter {
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compatible = "st,stm32-lptimer-counter";
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pinctrl-names = "default", "sleep";
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pinctrl-0 = <&lptim1_in_pins>;
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pinctrl-1 = <&lptim1_sleep_in_pins>;
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};
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};
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