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

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Date:   Tue, 12 May 2020 15:38:52 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     qii.wang@...iatek.com
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, leilk.liu@...iatek.com
Subject: Re: [PATCH] i2c: mediatek: Add i2c ac-timing adjust support

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.

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;

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.

All the best,

   Wolfram

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