linux-kernel - Re: [PATCH 1/2] dt-bindings: input: add GPIO controllable vibrator

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Message-ID: <20190327194319.GA20142@bogus>
Date:   Wed, 27 Mar 2019 14:43:19 -0500
From:   Rob Herring <robh@...nel.org>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        "open list:INPUT (KEYBOARD, MOUSE, JOYSTICK, TOUCHSCREEN)..." 
        <linux-input@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: input: add GPIO controllable vibrator

On Sat, Mar 02, 2019 at 03:11:30PM +0100, Luca Weiss wrote:
> Provide a simple driver for GPIO controllable vibrators.
> It will be used by the Fairphone 2.
> 
> Signed-off-by: Luca Weiss <luca@...tu.xyz>
> ---
>  .../devicetree/bindings/input/gpio-vibrator.txt  | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/gpio-vibrator.txt
> 
> diff --git a/Documentation/devicetree/bindings/input/gpio-vibrator.txt b/Documentation/devicetree/bindings/input/gpio-vibrator.txt
> new file mode 100644
> index 000000000000..9e2e9acf497b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/gpio-vibrator.txt
> @@ -0,0 +1,16 @@
> +* GPIO vibrator device tree bindings
> +
> +Registers a GPIO device as vibrator, where the vibration motor just has the capability to turn on or off. If the device is connected to a pwm, you should use the pwm-vibrator driver instead.

Need to wrap line.

> +
> +Required properties:
> +- compatible: should contain "gpio-vibrator"
> +- enable-gpios: Should contain a GPIO handle
> +- vcc-supply: Phandle for the regulator supplying power

This should probably be optional. There may not be a s/w controllable 
supply.

> +
> +Example from Fairphone 2:
> +
> +vibrator {
> +	compatible = "gpio-vibrator";
> +	enable-gpios = <&msmgpio 86 GPIO_ACTIVE_HIGH>;
> +	vcc-supply = <&pm8941_l18>;
> +};
> -- 
> 2.21.0
>