linux-kernel - Re: [PATCH v3 2/3] dt-bindings: i2c: designware: add optional pinctrl for bus recovery

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Message-ID: <20180917113325.13ed122f@xhacker.debian>
Date:   Mon, 17 Sep 2018 11:33:25 +0800
From:   Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        <linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/3] dt-bindings: i2c: designware: add optional
 pinctrl for bus recovery

+ DT maintainers

On Mon, 17 Sep 2018 11:28:30 +0800
Jisheng Zhang <Jisheng.Zhang@...aptics.com> wrote:

> Document the pinctrl property for bus recovery.
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-designware.txt | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
> index 1d6a6a8061ba..c1544d1f7b55 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
> @@ -24,6 +24,9 @@ Optional properties :
>  
>   - sda-gpios: specify the gpio of the SDA line for gpio recovery
>  
> + - pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c
> +   bus recovery, call it "gpio" state
> +
>  Examples :
>  
>  	i2c@...00 {
> @@ -46,6 +49,9 @@ Examples :
>  		i2c-sda-hold-time-ns = <300>;
>  		i2c-sda-falling-time-ns = <300>;
>  		i2c-scl-falling-time-ns = <300>;
> +		pinctrl-names = "default", "gpio";
> +		pinctrl-0 = <&pinctrl_i2c1>;
> +		pinctrl-1 = <&pinctrl_i2c1_gpio>;
>  		scl-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
>  		sda-gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
>  	};