linux-kernel - Re: [PATCH v2 5/7] IIO: add bindings for stm32 IIO timer driver

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Message-ID: <b2002a81-49fe-af2a-f13a-9f09831aa530@kernel.org>
Date:   Sun, 27 Nov 2016 14:25:46 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        lee.jones@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        alexandre.torgue@...com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, thierry.reding@...il.com,
        linux-pwm@...r.kernel.org, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net, linux-iio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     fabrice.gasnier@...com, gerald.baeza@...com,
        arnaud.pouliquen@...com, linus.walleij@...aro.org,
        linaro-kernel@...ts.linaro.org,
        Benjamin Gaignard <benjamin.gaignard@...com>
Subject: Re: [PATCH v2 5/7] IIO: add bindings for stm32 IIO timer driver

On 24/11/16 15:14, Benjamin Gaignard wrote:
> Define bindings for stm32 IIO timer
> 
> version 2:
> - only keep one compatible
> - add DT parameters to set lists of the triggers:
>   one list describe the triggers created by the device
>   another one give the triggers accepted by the device
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
> ---
>  .../bindings/iio/timer/stm32-iio-timer.txt         | 41 ++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt b/Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt
> new file mode 100644
> index 0000000..840b417
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/timer/stm32-iio-timer.txt
> @@ -0,0 +1,41 @@
> +timer IIO trigger bindings for STM32
> +
> +Must be a sub-node of STM32 general purpose timer driver
Add a cross reference...
> +
> +Required parameters:
> +- compatible:		must be "st,stm32-iio-timer"
st,stm32-adc-timer or something like that.
> +- interrupts:		Interrupt for this device
> +			See ../interrupt-controller/st,stm32-exti.txt
> +
> +Optional parameters:
> +- st,input-triggers-names:	List of the possible input triggers for
> +				the device
> +- st,output-triggers-names:	List of the possible output triggers for
> +				the device
What are input / output triggers?
> +
> +Possible triggers are defined in include/dt-bindings/iio/timer/st,stm32-iio-timer.h
> +
> +Example:
> +	gptimer1: gptimer1@...10000 {
> +		compatible = "st,stm32-gptimer";
> +		reg = <0x40010000 0x400>;
> +		clocks = <&rcc 0 160>;
> +		clock-names = "clk_int";
> +
> +		pwm1@0 {
> +			compatible = "st,stm32-pwm";
> +			st,pwm-num-chan = <4>;
> +			st,breakinput;
> +			st,complementary;
> +		};
> +
> +		iiotimer1@0 {
> +			compatible = "st,stm32-iio-timer";
> +			interrupts = <27>;
> +			st,input-triggers-names = TIM5_TRGO,
> +						  TIM2_TRGO,
> +						  TIM4_TRGO,
> +						  TIM3_TRGO;
> +			st,output-triggers-names = TIM1_TRGO;
> +		};
> +	};
>