linux-kernel - Re: [PATCH] i2c: designware: Get selected speed mode sda-hold-time via ACPI

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Message-ID: <237c2cf5-17dd-3d9c-ed4e-d0eadf611dfc@linux.intel.com>
Date:   Fri, 31 Mar 2017 15:12:05 +0300
From:   Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Tan Chin Yew <chin.yew.tan@...el.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: designware: Get selected speed mode sda-hold-time
 via ACPI

On 03/28/2017 12:13 PM, Andy Shevchenko wrote:
> On Tue, 2017-03-28 at 16:48 +0800, Tan Chin Yew wrote:
>> Sda-hold-time is an important parameter for tuning i2c to meet the
>> electrical specification especially for high speed. I2C with incorrect
>> sda-hold-time may cause lost arbitration error. Instead of loading all
>> speed mode settings, only selected speed mode settings are loaded.
>>
>> Signed-off-by: Tan Chin Yew <chin.yew.tan@...el.com>
>
>
> Looks good to me:
>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>
Acked-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>