linux-kernel - Re: [PATCH 01/11] dt-bindings: pinctrl: Optional DT property to support pin mappings

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Message-ID: <CAL_JsqJaJO+ytBrZvwHkPjM9-Wr8MHMK-uTV93QLium3JL_A3Q@mail.gmail.com>
Date:	Thu, 22 Oct 2015 13:45:03 -0500
From:	Rob Herring <robh+dt@...nel.org>
To:	Pramod Kumar <pramodku@...adcom.com>
Cc:	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Russell King <linux@....linux.org.uk>,
	Linus Walleij <linus.walleij@...aro.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
	Jason Uy <jasonuy@...adcom.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jonas Gorski <jogo@...nwrt.org>
Subject: Re: [PATCH 01/11] dt-bindings: pinctrl: Optional DT property to
 support pin mappings

On Mon, Oct 19, 2015 at 12:43 AM, Pramod Kumar <pramodku@...adcom.com> wrote:
> If GPIO controller's pins are muxed, pin-controller subsystem
> need to be intimated by defining mapping between gpio and
> pinmux controller. This patch adds required properties to
> define this mapping via DT.
>
> Signed-off-by: Pramod Kumar <pramodku@...adcom.com>
> Reviewed-by: Ray Jui <rjui@...adcom.com>
> Reviewed-by: Scott Branden <sbranden@...adcom.com>

Acked-by: Rob Herring <robh@...nel.org>

> ---
>  .../devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt         | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
> index 6540ca5..25a5002 100644
> --- a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
> +++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
> @@ -26,9 +26,13 @@ Optional properties:
>  - interrupt-controller:
>      Specifies that the node is an interrupt controller
>
> -- pinmux:
> -    Specifies the phandle to the IOMUX device, where pins can be individually
> -muxed to GPIO
> +- gpio-ranges:
> +    Specifies the mapping between gpio controller and pin-controllers pins.
> +    This requires 4 fields in cells defined as -
> +    1. Phandle of pin-controller.
> +    2. GPIO base pin offset.
> +    3  Pin-control base pin offset.
> +    4. number of gpio pins which are linearly mapped from pin base.
>
>  Supported generic PINCONF properties in child nodes:
>
> @@ -78,6 +82,8 @@ Example:
>                 gpio-controller;
>                 interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
>                 interrupt-controller;
> +               gpio-ranges = <&pinctrl 0 42 1>,
> +                               <&pinctrl 1 44 3>;
>         };
>
>         /*
> --
> 1.9.1
>
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