From: Greg Schnorr <gschnorr@cisco.com>
To: Guenter Roeck <guenter.roeck@ericsson.com>,
Jean Delvare <khali@linux-fr.org>
Cc: Jonathan Cameron <kernel@jic23.retrosnub.co.uk>,
Randy Dunlap <rdunlap@xenotime.net>, <lm-sensors@lm-sensors.org>,
<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] hwmon: (pmbus) More stringent checking of VOUT_MODE register
Date: Mon, 07 Mar 2011 13:44:43 -0800 [thread overview]
Message-ID: <C99A91CB.5A89D%gschnorr@cisco.com> (raw)
In-Reply-To: <1299043940-22798-1-git-send-email-guenter.roeck@ericsson.com>
Looks good, tested and works on one such VOUT_MODE poor design...
On 3/1/11 9:32 PM, "Guenter Roeck" <guenter.roeck@ericsson.com> wrote:
> Some PMBus chips do not support the VOUT_MODE register. To make matters worse,
> such chips may not return an error when reading the register either, but
> instead
> return 0xff.
>
> Check if the register exists using pmbus_check_byte_register() before reading
> its value. In addition, validate the returned value and ignore it if it is
> 0xff
> (which is invalid).
>
> Reported-by: Greg Schnorr <gschnorr@cisco.com>
> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Greg Schnorr <gschnorr@cisco.com>
next prev parent reply other threads:[~2011-03-07 21:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 5:32 [PATCH] hwmon: (pmbus) More stringent checking of VOUT_MODE register Guenter Roeck
2011-03-07 21:44 ` Greg Schnorr [this message]
2011-03-07 22:11 ` Guenter Roeck
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