Date: Fri, 24 Feb 2012 13:17:53 +0100
From: Wolfram Sang <w.sang@pengutronix.de>
To: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Jean Delvare <khali@linux-fr.org>, Ben Dooks <ben-linux@fluff.org>,
        Feng Tang <feng.tang@intel.com>, linux-i2c@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] i2c-eg20t: Rework pch_i2c_wait_for_bus_idle to
 reduce wait time
Message-ID: <20120224121753.GE2479@pengutronix.de>
References: <1329725656-32715-1-git-send-email-alexander.stein@systec-electronic.com>
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On Mon, Feb 20, 2012 at 09:14:16AM +0100, Alexander Stein wrote:
> If you insert several i2c transfers, the driver might start the next one
> while the STOP bit of the previous transfer is still on the bus, marking
> the bus as busy.
> pch_i2c_wait_for_bus_idle does an msleep(20) delaying the next transfer
> by >=3D20ms. Reduce wait time by actively waiting 5 us once, then using
> usleep_range.
>=20
> Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>

Tomoya, are you happy with it? (I hope he reads the list, since his
companies mailserver doesn't seem to accept my mails).

Regards,

   Wolfram

--=20
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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