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author | Benjamin Gaignard <benjamin.gaignard@st.com> | 2019-04-02 09:30:43 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 22:33:40 +0300 |
commit | ec63e2a4897075e427c121d863bd89c44578094f (patch) | |
tree | a87c9f7b4994b0a4ff45e58b65b4c858e7e44e93 /Documentation/devicetree/bindings/counter | |
parent | ad29937e206f5e3fb7ef0d123902505a680f8969 (diff) | |
download | linux-ec63e2a4897075e427c121d863bd89c44578094f.tar.xz |
dt-bindings: counter: Document stm32 quadrature encoder
Add bindings for STM32 Timer quadrature encoder.
It is a sub-node of STM32 Timer which implement the
quadratic encoder part of the hardware.
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/counter')
-rw-r--r-- | Documentation/devicetree/bindings/counter/stm32-timer-cnt.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/counter/stm32-timer-cnt.txt b/Documentation/devicetree/bindings/counter/stm32-timer-cnt.txt new file mode 100644 index 000000000000..c52fcdd4bf6c --- /dev/null +++ b/Documentation/devicetree/bindings/counter/stm32-timer-cnt.txt @@ -0,0 +1,31 @@ +STMicroelectronics STM32 Timer quadrature encoder + +STM32 Timer provides quadrature encoder to detect +angular position and direction of rotary elements, +from IN1 and IN2 input signals. + +Must be a sub-node of an STM32 Timer device tree node. +See ../mfd/stm32-timers.txt for details about the parent node. + +Required properties: +- compatible: Must be "st,stm32-timer-counter". +- pinctrl-names: Set to "default". +- pinctrl-0: List of phandles pointing to pin configuration nodes, + to set CH1/CH2 pins in mode of operation for STM32 + Timer input on external pin. + +Example: + timers@40010000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "st,stm32-timers"; + reg = <0x40010000 0x400>; + clocks = <&rcc 0 160>; + clock-names = "int"; + + counter { + compatible = "st,stm32-timer-counter"; + pinctrl-names = "default"; + pinctrl-0 = <&tim1_in_pins>; + }; + }; |