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Date:   Mon, 23 Apr 2018 15:33:10 +0800
From:   Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To:     Peter Chen <peter.chen@nxp.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
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        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH resend] usb: chipidea: Don't select EXTCON
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On Fri, 20 Apr 2018 09:35:54 +0000 Peter Chen wrote:

>  
> > >
> > > Sorry to reply late, are you really care 2KB code side? Since many
> > > users use EXTCON to handle vbus and id, it is hard just delete it. I
> > > could accept patch for your specific platforms, like:
> > >
> > > +	select EXTCON if !ARCH_XXXX  
> > 
> > The patch doesn't remove extcon support from chipidea driver.
> > I just want to not select EXTCON unconditionally, but let the users choose. If the
> > users need extcon, they could enable EXTCON themselves
> > 
> > I just searched all the dts in arch/arm/boot/dts and arch/arm64/boot/dts only the four
> > dts give extcon phandle to chipidea host, other users don't make use of it:
> > 
> > arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi
> > 
> > arch/arm/boot/dts/qcom-apq8074-dragonboard.dts
> > 
> > arch/arm/boot/dts/qcom-msm8974-fairphone-fp2.dts
> > 
> > arch/arm/boot/dts/qcom-msm8974-sony-xperia-castor.dts
> >   
> 
> I see, but I do not want to break msm platforms. You may try to create Glue driver Kconfig
> entry for chipidea like dwc3, and let msm depends on EXTCON.

Got your points. Since multi_v7_defconfig has selected EXTCON, and
EXTCON_USB_GPIO(which depends on EXTCON) is enabled in arm64 defconfig, so
what about:

enable EXTCON explicitly in arm64 defconfig?
then add this patch?

Is it acceptable?

Thanks,
Jisheng