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Message-ID: <VI1PR04MB14558BCFB82A06C92F7AA0CA8BB40@VI1PR04MB1455.eurprd04.prod.outlook.com>
Date:   Fri, 20 Apr 2018 09:35:54 +0000
From:   Peter Chen <peter.chen@....com>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH resend] usb: chipidea: Don't select EXTCON

 
> >
> > 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.

Peter

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