[PATCH v6 6/9] dt-bindings: counter: Document stm32 quadrature encoder
From: robh+dt@kernel.org (Rob Herring)
Date: 2018-05-17 16:23:47
Also in:
linux-devicetree, linux-iio, lkml
On Wed, May 16, 2018 at 12:51 PM, William Breathitt Gray [off-list ref] wrote:
From: Benjamin Gaignard <redacted>
v6? Where's v1-v5?
quoted hunk ↗ jump to hunk
Add bindings for STM32 Timer quadrature encoder. It is a sub-node of STM32 Timer which implement the counter part of the hardware. Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Benjamin Gaignard <redacted> Signed-off-by: William Breathitt Gray <redacted> --- .../bindings/counter/stm32-timer-cnt.txt | 26 +++++++++++++++++++ .../devicetree/bindings/mfd/stm32-timers.txt | 7 +++++ 2 files changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/counter/stm32-timer-cnt.txtdiff --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..377728128bef --- /dev/null +++ b/Documentation/devicetree/bindings/counter/stm32-timer-cnt.txt@@ -0,0 +1,26 @@ +STMicroelectronics STM32 Timer quadrature encoder + +STM32 Timer provides quadrature encoder counter mode to detect
'mode' does not sound like a sub-block of the timers block.
+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 IN1/IN2 pins in mode of operation for Low-Power
+ Timer input on external pin.
+
+Example:
+ timers at 40010000 {
+ compatible = "st,stm32-timers";
+ ...
+ counter {
+ compatible = "st,stm32-timer-counter";Is there only 1? How is the counter addressed?
+ pinctrl-names = "default"; + pinctrl-0 = <&tim1_in_pins>; + }; + };