linux-kernel - Re: [PATCH v2] i2c: rk3x: fix bug that cause measured high

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Date:	Fri, 5 Dec 2014 11:31:47 -0800
From:	Doug Anderson <dianders@...omium.org>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	Addy Ke <addy.ke@...k-chips.com>,
	Max Schwarz <max.schwarz@...ine.de>,
	Heiko Stübner <heiko@...ech.de>,
	Olof Johansson <olof@...om.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...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>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	Eddie Cai <cf@...k-chips.com>, Jianqun Xu <xjq@...k-chips.com>,
	Tao Huang <huangtao@...k-chips.com>,
	Chris <zyw@...k-chips.com>,
	姚智情 <yzq@...k-chips.com>,
	han jiang <hj@...k-chips.com>,
	Kever Yang <kever.yang@...k-chips.com>,
	Lin Huang <hl@...k-chips.com>,
	caesar <caesar.wang@...k-chips.com>,
	Shunqian Zheng <zhengsq@...k-chips.com>
Subject: Re: [PATCH v2] i2c: rk3x: fix bug that cause measured high_ns doesn't
 meet I2C spec

Hi,

On Thu, Dec 4, 2014 at 11:03 AM, Wolfram Sang <wsa@...-dreams.de> wrote:
>
>> > New binding should have the "-ns" suffix, right? So, I'd vote to add the
>> > suffix to the new bindings and deprecate the ones used in the designware
>> > driver: "i2c-scl-rising-time-ns" and "i2c-scl-falling-time-ns"
>> >
>> > It might be a little more work now, but it will help us in the future,
>> > because it is the correct way to do it.
>>
>> OK, that sounds fair.  You're OK with my proposal otherwise?
>
> Yes.

OK, for simplicity I put my requested changes in
<https://chromium-review.googlesource.com/#/c/232774/3>


>> Are you looking for Addy or me to submit a patch supporting the "-ns"
>> suffix on the Designware i2c driver, or should we just use the "-ns"
>> suffix in the Rockchip driver and assume someone will later add
>> support for the new binding in the Designware i2c driver?
>
> I'd be really happy if you can do it. I'd love to have consistency right
> away.

Well that was easy.  https://patchwork.kernel.org/patch/5445231/

-Doug
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