[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <7e5b0d84eb64a9f11770bb9734f8303ebf6f7178.1532298882.git.vilhelm.gray@gmail.com>
Date: Sun, 22 Jul 2018 18:51:34 -0400
From: William Breathitt Gray <vilhelm.gray@...il.com>
To: gregkh@...uxfoundation.org
Cc: jic23@...nel.org, linux-arm-kernel@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-iio@...r.kernel.org, fabrice.gasnier@...com,
benjamin.gaignard@...com, knaack.h@....de, lars@...afoo.de,
pmeerw@...erw.net, akpm@...ux-foundation.org,
Mark Rutland <mark.rutland@....com>,
William Breathitt Gray <vilhelm.gray@...il.com>
Subject: [PATCH v9 08/11] dt-bindings: counter: Document stm32 quadrature encoder
From: Benjamin Gaignard <benjamin.gaignard@...com>
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@....com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
Acked-by: Rob Herring <robh@...nel.org>
Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
---
.../bindings/counter/stm32-timer-cnt.txt | 31 +++++++++++++++++++
.../devicetree/bindings/mfd/stm32-timers.txt | 7 +++++
2 files changed, 38 insertions(+)
create mode 100644 Documentation/devicetree/bindings/counter/stm32-timer-cnt.txt
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@...10000 {
+ #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>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/mfd/stm32-timers.txt b/Documentation/devicetree/bindings/mfd/stm32-timers.txt
index 0e900b52e895..15c3b87f51d9 100644
--- a/Documentation/devicetree/bindings/mfd/stm32-timers.txt
+++ b/Documentation/devicetree/bindings/mfd/stm32-timers.txt
@@ -28,6 +28,7 @@ Optional parameters:
Optional subnodes:
- pwm: See ../pwm/pwm-stm32.txt
- timer: See ../iio/timer/stm32-timer-trigger.txt
+- counter: See ../counter/stm32-timer-cnt.txt
Example:
timers@...10000 {
@@ -48,6 +49,12 @@ Example:
compatible = "st,stm32-timer-trigger";
reg = <0>;
};
+
+ counter {
+ compatible = "st,stm32-timer-counter";
+ pinctrl-names = "default";
+ pinctrl-0 = <&tim1_in_pins>;
+ };
};
Example with all dmas:
--
2.18.0
Powered by blists - more mailing lists