From mboxrd@z Thu Jan 1 00:00:00 1970 From: fabrice.gasnier@st.com (Fabrice Gasnier) Date: Fri, 7 Jul 2017 18:31:06 +0200 Subject: [PATCH v3 7/9] dt-bindings: iio: Add STM32 LPTimer quadrature encoder and counter In-Reply-To: <1499445068-7037-1-git-send-email-fabrice.gasnier@st.com> References: <1499445068-7037-1-git-send-email-fabrice.gasnier@st.com> Message-ID: <1499445068-7037-8-git-send-email-fabrice.gasnier@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add documentation for STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter binding. Signed-off-by: Fabrice Gasnier Acked-by: Jonathan Cameron Acked-by: Rob Herring --- Changes in v3: - Rob's comment on node name: timer at ... Changes in v2: - s/Low Power/Low-Power - remove leading 0x in example (parent node) - improve properties descriptions --- .../bindings/iio/counter/stm32-lptimer-cnt.txt | 27 ++++++++++++++++++++++ 1 file changed, 27 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..a04aa5c --- /dev/null +++ b/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt @@ -0,0 +1,27 @@ +STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter + +STM32 Low-Power 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 Low-Power Timer device tree node. +See ../mfd/stm32-lptimer.txt for details about the parent node. + +Required properties: +- compatible: Must be "st,stm32-lptimer-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: + timer at 40002400 { + compatible = "st,stm32-lptimer"; + ... + counter { + compatible = "st,stm32-lptimer-counter"; + pinctrl-names = "default"; + pinctrl-0 = <&lptim1_in_pins>; + }; + }; -- 1.9.1