linux-kernel - Re: [PATCH v7 5/8] IIO: add bindings for STM32 timer trigger driver

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Message-ID: <20170109180448.f3pcpuarhcddo76b@rob-hp-laptop>
Date:   Mon, 9 Jan 2017 12:04:48 -0600
From:   Rob Herring <robh@...nel.org>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>
Cc:     lee.jones@...aro.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, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, linux-iio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, 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 v7 5/8] IIO: add bindings for STM32 timer trigger driver

On Thu, Jan 05, 2017 at 10:25:41AM +0100, Benjamin Gaignard wrote:
> Define bindings for STM32 timer trigger
> 
> version 4:
> - remove triggers enumeration from DT
> - add reg parameter
> 
> version 3:
> - change file name
> - add cross reference with mfd bindings
> 
> 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-timer-trigger.txt     | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/timer/stm32-timer-trigger.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/timer/stm32-timer-trigger.txt b/Documentation/devicetree/bindings/iio/timer/stm32-timer-trigger.txt
> new file mode 100644
> index 0000000..36a6c4a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/timer/stm32-timer-trigger.txt
> @@ -0,0 +1,23 @@
> +STMicroelectronics STM32 Timers IIO timer bindings
> +
> +Must be a sub-node of an STM32 Timers device tree node.
> +See ../mfd/stm32-timers.txt for details about the parent node.
> +
> +Required parameters:
> +- compatible:	Must be "st,stm32-timer-trigger".
> +- reg:		Define triggers configuration of the hardware IP.

Valid values? Not sure this makes sense for use of reg. reg should be 
how you address or id a device.

> +
> +Example:
> +	timers@...10000 {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		compatible = "st,stm32-timers";
> +		reg = <0x40010000 0x400>;
> +		clocks = <&rcc 0 160>;
> +		clock-names = "clk_int";
> +
> +		timer {

This would also need an unit address.

> +			compatible = "st,stm32-timer-trigger";
> +			reg = <0>;
> +		};
> +	};
> -- 
> 1.9.1
>