linux-kernel - Re: [PATCH] i2c: mediatek: Add i2c ac-timing adjust support

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Message-ID: <1589418905.25512.10.camel@mhfsdcap03>
Date:   Thu, 14 May 2020 09:15:05 +0800
From:   Qii Wang <qii.wang@...iatek.com>
To:     Wolfram Sang <wsa@...-dreams.de>
CC:     <linux-i2c@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH] i2c: mediatek: Add i2c ac-timing adjust support

On Tue, 2020-05-12 at 15:38 +0200, Wolfram Sang wrote:
> Hi Qii Wang,
> 
> On Thu, Mar 26, 2020 at 07:54:36PM +0800, qii.wang@...iatek.com wrote:
> > From: Qii Wang <qii.wang@...iatek.com>
> > 
> > This patch adds a algorithm to calculate some ac-timing parameters
> > which can fully meet I2C Spec.
> > 
> > Signed-off-by: Qii Wang <qii.wang@...iatek.com>
> 
> Could you rebase this on top of i2c/for-next or v5.7-rcX? Because of
> commit 90224e6468e1 ("i2c: drivers: Use generic definitions for bus
> frequencies") which was added two days before your patch was sent out.
> 
> Otherwise mostly minor nits.
> 
> > +static int mtk_i2c_max_step_cnt(unsigned int target_speed)
> > +{
> > +	if (target_speed > MAX_FS_MODE_SPEED)
> > +		return MAX_HS_STEP_CNT_DIV;
> > +	else
> > +		return MAX_STEP_CNT_DIV;
> > +}
> 
> Maybe ternary operator here? Your choice.
> 

Use ternary operator here will over 80 bytes, and need a line break,
Maybe this code looks simpler.

> And my code checkers complained:
> 
>     CPPCHECK
> drivers/i2c/busses/i2c-mt65xx.c:591:11: warning: Redundant assignment of 'sda_max' to itself. [selfAssignment]
>   sda_max = sda_max;
>           ^
> drivers/i2c/busses/i2c-mt65xx.c:597:11: warning: Redundant assignment of 'sda_min' to itself. [selfAssignment]
>   sda_min = sda_min;
> 
ok, I will modify it.

> Last question: You seem to be the one doing major updates to this
> driver. Thanks for that! Are you maybe interested in becoming the
> maintainer for this driver? I think there won't be much patches to
> review and reports to handle but it will speed up processing for me.
> 

Yes, It is my honor to be the maintainer for this driver.

> All the best,
> 
>    Wolfram
>