linux-kernel - Re: [PATCH v2 7/8] dt-bindings: iio: Add STM32 LPTimer quadrature encoder and counter

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Message-ID: <20170624211441.18ddfe81@kernel.org>
Date:   Sat, 24 Jun 2017 21:14:41 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Fabrice Gasnier <fabrice.gasnier@...com>
Cc:     <lee.jones@...aro.org>, <benjamin.gaignard@...aro.org>,
        <thierry.reding@...il.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <alexandre.torgue@...com>,
        <mcoquelin.stm32@...il.com>, <benjamin.gaignard@...com>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pwm@...r.kernel.org>
Subject: Re: [PATCH v2 7/8] dt-bindings: iio: Add STM32 LPTimer quadrature
 encoder and counter

On Wed, 21 Jun 2017 16:30:14 +0200
Fabrice Gasnier <fabrice.gasnier@...com> wrote:

> Add documentation for STMicroelectronics STM32 Low-Power Timer
> quadrature encoder and counter binding.
> 
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com>
Acked-by: Jonathan Cameron <jic23@...nel.org>
> ---
> 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..b9fd014
> --- /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:
> +	lptimer1: lptimer@...02400 {
> +		compatible = "st,stm32-lptimer";
> +		...
> +		counter {
> +			compatible = "st,stm32-lptimer-counter";
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&lptim1_in_pins>;
> +		};
> +	};