From mboxrd@z Thu Jan 1 00:00:00 1970 From: fabrice.gasnier@st.com (Fabrice Gasnier) Date: Fri, 16 Jun 2017 17:58:45 +0200 Subject: [PATCH 7/8] dt-bindings: iio: Add STM32 LPTimer quadrature encoder and counter In-Reply-To: <1497628726-7563-1-git-send-email-fabrice.gasnier@st.com> References: <1497628726-7563-1-git-send-email-fabrice.gasnier@st.com> Message-ID: <1497628726-7563-8-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 --- .../bindings/iio/counter/stm32-lptimer-cnt.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 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..e31e54d --- /dev/null +++ b/Documentation/devicetree/bindings/iio/counter/stm32-lptimer-cnt.txt @@ -0,0 +1,25 @@ +STMicroelectronics STM32 Low Power Timer quadrature encoder and counter + +STM32 LP 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 LP Timer device tree node. +See ../mfd/stm32-lptimer.txt for details about the parent node. + +Required properties: +- compatible: Must be "st,stm32-lptimer-counter". +- A pinctrl state named "default" can be defined to set IN1/IN2 pins in mode + of operation for LP Timer input signals on external pin. + +Example: + lptimer1: lptimer at 0x40002400 { + compatible = "st,stm32-lptimer"; + ... + counter { + compatible = "st,stm32-lptimer-counter"; + pinctrl-names = "default"; + pinctrl-0 = <&lptim1_in_pins>; + }; + }; -- 1.9.1