linux-kernel - Re: [PATCH 6/6] pinctrl: mt8173: set GPIO16 to usb iddig mode

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Date:	Wed, 11 May 2016 19:09:02 -0700
From:	Hongzhou Yang <hongzhou.yang@...iatek.com>
To:	chunfeng yun <chunfeng.yun@...iatek.com>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Maoguang Meng <maoguang.meng@...iatek.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <felipe.balbi@...ux.intel.com>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Pawel Moll <pawel.moll@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Biao Huang <biao.huang@...iatek.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"moderated list:ARM/Mediatek SoC support" 
	<linux-mediatek@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH 6/6] pinctrl: mt8173: set GPIO16 to usb iddig mode

On Thu, 2016-05-12 at 09:41 +0800, chunfeng yun wrote:
> Hi,
> 
> On Wed, 2016-05-11 at 11:32 -0700, Hongzhou Yang wrote:
> > On Wed, 2016-05-11 at 13:56 +0200, Linus Walleij wrote:
> > > On Tue, May 10, 2016 at 10:23 AM, Chunfeng Yun
> > > <chunfeng.yun@...iatek.com> wrote:
> > > 
> > > > the default mode of GPIO16 pin is gpio, when set EINT16 to
> > > > IRQ_TYPE_LEVEL_HIGH, no interrupt is triggered, it can be
> > > > fixed when set its default mode as usb iddig.
> > > >
> > > > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > > 
> > 
> > Chunfeng, GPIO16 can be used as EINT16 mode, but the pinmux should be 0.
> > If you want to set its default mode to iddig, you should set it in dts.
> > 
> I set it in DTS, but it didn't work, because when usb driver requested
> IRQ, pinmux was switched back to default mode set by
> MTK_EINT_FUNCTION().
> 

After confirmed, there are something wrong with data sheet and pinmux
table, and GPIO16 can only receive interrupt by mode 1. So

Acked-by: Hongzhou Yang <hongzhou.yang@...iatek.com>

Yours,
Hongzhou