linux-kernel - Re: [PATCH] hwmon: HIH-6130: Support I2C bus drivers without I2C_FUNC_SMBUS

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Message-ID: <20131211212835.GA23938@roeck-us.net>
Date:	Wed, 11 Dec 2013 13:28:35 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	José Miguel Gonçalves <jose.goncalves@...v.pt>
Cc:	Jean Delvare <khali@...ux-fr.org>, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hwmon: HIH-6130: Support I2C bus drivers without
 I2C_FUNC_SMBUS_QUICK

On Wed, Dec 11, 2013 at 07:51:54PM +0000, José Miguel Gonçalves wrote:
> On 11-12-2013 19:29, Guenter Roeck wrote:
> >On Wed, Dec 11, 2013 at 11:11:13AM +0000, José Miguel Gonçalves wrote:
> >>Some I2C bus drivers do not allow zero-length data transfers which are
> >>required to start a measurement with the HIH6130/1 sensor. Nevertheless,
> >>we can overcome this limitation by writing a zero dummy byte. This byte
> >>is ignored by the sensor and was verified to be working with the OMAP
> >>I2C bus driver in a BeagleBone board.
> >>
> >>Signed-off-by: José Miguel Gonçalves <jose.goncalves@...v.pt>
> >Applied, after simplifying write_length initialization a bit.
> >
> >Should this go to -stable ?
> 
> Any BeagleBone user that tries to use this sensor will encounter
> this issue. As this board is very popular, this will potentially
> solve the problems of many users. Nevertheless, it does not seems to
> me that this patch fixes "something critical", which is one of the
> conditions to be accepted in the -stable tree.
> 
Depends on the definition of "critical".

Guenter
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