linux-kernel - Re: [PATCH] i2c: rk3x: Give the tuning value 0 during rk3x_i2c_v0_calc

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Message-ID: <CAD=FV=VKJhaZtfT7CZBN1UE0-aHpJrMPYUDicO6vAcNUvfOP5g@mail.gmail.com>
Date:   Mon, 24 Oct 2016 11:29:54 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     David Wu <david.wu@...k-chips.com>
Cc:     Heiko Stübner <heiko@...ech.de>,
        Wolfram Sang <wsa@...-dreams.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i2c: rk3x: Give the tuning value 0 during rk3x_i2c_v0_calc_timings

Hi,

On Sat, Oct 22, 2016 at 1:43 AM, David Wu <david.wu@...k-chips.com> wrote:
> We found a bug that i2c transfer sometimes failed on 3066a board with
> stabel-4.8, the con register would be updated by uninitialized tuning
> value, it made the i2c transfer failed.
>
> So give the tuning value to be zero during rk3x_i2c_v0_calc_timings.
>
> Signed-off-by: David Wu <david.wu@...k-chips.com>
> ---
>  drivers/i2c/busses/i2c-rk3x.c | 2 ++
>  1 file changed, 2 insertions(+)

Reviewed-by: Douglas Anderson <dianders@...omium.org>