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Subject: Re: [PATCH v2 1/1] Input: atmel_mxt_ts - implement I2C retries
To:     Jiada Wang <jiada_wang@mentor.com>, nick@shmanahar.org,
        dmitry.torokhov@gmail.com
Cc:     linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        Andrew_Gabbasov@mentor.com, erosca@de.adit-jv.com
References: <20200903155904.17454-1-jiada_wang@mentor.com>
From:   Dmitry Osipenko <digetx@gmail.com>
Message-ID: <88f1aa79-56e1-d41a-a29d-0f7c5d9bd990@gmail.com>
Date:   Sat, 5 Sep 2020 17:06:57 +0300
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03.09.2020 18:59, Jiada Wang пишет:
> From: Nick Dyer <nick.dyer@itdev.co.uk>
> 
> Some maXTouch chips (eg mXT1386) will not respond on the first I2C request
> when they are in a sleep state. It must be retried after a delay for the
> chip to wake up.
> 
> Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
> Acked-by: Yufeng Shen <miletus@chromium.org>
> (cherry picked from ndyer/linux/for-upstream commit 63fd7a2cd03c3a572a5db39c52f4856819e1835d)
> [gdavis: Forward port and fix conflicts.]
> Signed-off-by: George G. Davis <george_davis@mentor.com>
> [jiada: return exact errno when i2c_transfer & i2c_master_send fails]
> Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
> ---
>  drivers/input/touchscreen/atmel_mxt_ts.c | 45 ++++++++++++++++--------
>  1 file changed, 30 insertions(+), 15 deletions(-)

Hello, Jiada!

Everything works well on Acer A500 tablet device that uses mXT1386 for
the touchscreen controller! Thank you very much!

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>