linux-kernel - Re: [PATCH 2/2] dt-bindings: timer: imx: gpt: Add pin group bindings for input capture

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Message-ID: <20191027212121.GA3049@bogus>
Date:   Sun, 27 Oct 2019 16:21:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     Steve Longerbeam <slongerbeam@...il.com>
Cc:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        "open list:CLOCKSOURCE, CLOCKEVENT DRIVERS" 
        <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/2] dt-bindings: timer: imx: gpt: Add pin group bindings
 for input capture

On Tue, Oct 15, 2019 at 06:05:44PM -0700, Steve Longerbeam wrote:
> Add pin group bindings to support input capture function of the i.MX
> GPT.
> 
> Signed-off-by: Steve Longerbeam <slongerbeam@...il.com>
> ---
>  .../devicetree/bindings/timer/fsl,imxgpt.txt  | 28 +++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt b/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
> index 5d8fd5b52598..32797b7b0d02 100644
> --- a/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
> +++ b/Documentation/devicetree/bindings/timer/fsl,imxgpt.txt
> @@ -33,6 +33,13 @@ Required properties:
>             an entry for each entry in clock-names.
>  - clock-names : must include "ipg" entry first, then "per" entry.
>  
> +Optional properties:
> +
> +- pinctrl-0: For the i.MX GPT to support the Input Capture function,
> +  	     the input capture channel pin groups must be listed here.
> +- pinctrl-names: must be "default".
> +
> +
>  Example:
>  
>  gpt1: timer@...03000 {
> @@ -43,3 +50,24 @@ gpt1: timer@...03000 {
>  		 <&clks IMX27_CLK_PER1_GATE>;
>  	clock-names = "ipg", "per";
>  };
> +
> +
> +Example with input capture channel 0 support:
> +
> +pinctrl_gpt_input_capture0: gptinputcapture0grp {
> +	fsl,pins = <
> +		MX6QDL_PAD_SD1_DAT0__GPT_CAPTURE1 0x1b0b0
> +	>;
> +};
> +
> +gpt: gpt@...8000 {

timer@...

I don't really think this merits another example though. 

> +	compatible = "fsl,imx6q-gpt", "fsl,imx31-gpt";
> +	reg = <0x02098000 0x4000>;
> +	interrupts = <0 55 IRQ_TYPE_LEVEL_HIGH>;
> +	clocks = <&clks IMX6QDL_CLK_GPT_IPG>,
> +		<&clks IMX6QDL_CLK_GPT_IPG_PER>,
> +		<&clks IMX6QDL_CLK_GPT_3M>;
> +	clock-names = "ipg", "per", "osc_per";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_gpt_input_capture0>;
> +};
> -- 
> 2.17.1
>