Message-ID: <5214BB6C.3060903@ti.com>
Date: Wed, 21 Aug 2013 18:36:52 +0530
From: George Cherian <george.cherian@ti.com>
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To: Stephen Warren <swarren@wwwdotorg.org>
CC: <balbi@ti.com>, <myungjoo.ham@samsung.com>, <cw00.choi@samsung.com>,
        <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <grant.likely@linaro.org>,
        <rob@landley.net>, <ian.campbell@citrix.com>, <mark.rutland@arm.com>,
        <pawel.moll@arm.com>, <rob.herring@calxeda.com>,
        <linux-omap@vger.kernel.org>, <linux-usb@vger.kernel.org>,
        <bcousson@baylibre.com>
Subject: Re: [PATCH 1/2] extcon: extcon-dra7xx: Add extcon driver for USB
 ID detection
References: <1376648029-30659-1-git-send-email-george.cherian@ti.com> <1376648029-30659-2-git-send-email-george.cherian@ti.com> <52127284.6030506@wwwdotorg.org> <521312CC.8060003@ti.com> <52139F0F.6090507@wwwdotorg.org>
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Hi Stephen,

On 8/20/2013 10:23 PM, Stephen Warren wrote:
>> >ID pins are connected to pcf8575, and the pcf8575's interrupt line is
>> >inturn connected to
>> >gpio bank6 pin 11, we use this gpio interrupt to detect the ID pin change.
> In that case, the PCF8575 node needs to be a GPIO controller and an IRQ
> controller, as does the driver for the PCF8575. This binding should have
> a single entry in the gpios property, and the driver can call
> gpio_to_irq() on that so it knows which IRQ to request.

You meant some thing like this?

        pcf_usb: pcf8575@21 {
                 compatible = "ti,pcf8575";
                 reg = <0x21>;
                 gpio-controller;
                 #gpio-cells = <2>;
                 interrupt-parent = <&gpio6>;
                 interrupts = <11 2>;
                 interrupt-controller;
                 #interrupt-cells = <2>;
         };

	 usb_vid_gpio {
                 compatible = "ti,dra7xx-usb";
                 gpios = <&pcf_usb 1 0>;
              
         };


-- 
-George

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