linux-kernel - Re: [lm-sensors] [PATCH 1/2] hwmon: tmp401: add support for TI TMP435

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Date:	Thu, 4 Dec 2014 10:42:12 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Jean Delvare <jdelvare@...e.de>
Cc:	Bartosz Golaszewski <bgolaszewski@...libre.com>,
	Patrick Titiano <ptitiano@...libre.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Benoit Cousson <bcousson@...libre.com>,
	LM Sensors <lm-sensors@...sensors.org>
Subject: Re: [lm-sensors] [PATCH 1/2] hwmon: tmp401: add support for TI TMP435

On Thu, Dec 04, 2014 at 06:32:28PM +0100, Jean Delvare wrote:
> On Thu, 4 Dec 2014 15:33:47 +0100, Bartosz Golaszewski wrote:
> > 2014-12-04 15:19 GMT+01:00 Guenter Roeck <linux@...ck-us.net>:
> > > The datasheet claims otherwise (0x31, specifically).
> > > Is this based on real chip information ?
> > > Can you send me the output from i2cdump for the chip ?
> > >
> > 
> > This is what I'm reading:
> > 
> > # i2cdump -y 1 0x4c
> > No size specified (using byte-data access)
> >      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
> > 00: 1a 1b 00 00 05 55 00 55 00 00 05 55 00 55 00 0d    ??..?U.U..?U.U.?
> > 10: 70 00 00 00 00 90 00 00 00 55 1c XX XX XX XX 00    p....?...U?XXXX.
> > 20: 55 0a 70 XX XX 0f XX XX XX XX XX XX XX XX XX XX    U?pXX?XXXXXXXXXX
> > 30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > 40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > 50: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > 60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > 70: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > 80: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > 90: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > a0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > b0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > c0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > d0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > e0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX    XXXXXXXXXXXXXXXX
> > f0: XX XX XX XX XX XX XX XX XX XX XX XX 00 35 55 35    XXXXXXXXXXXX.5U5
> > 
> > # i2cget -y 1 0x4c 0xff b
> > 0x35
> 
> That makes sense for a chip named TMP435. Looks like TI forgot to
> update the value when copying the datasheet from TMP431 to TMP435.
> 
Guess so.

I'll make the necessary updates to sensors-detect and the web page.

> Thanks for the dump, by the way :)
> 

Same here .. that also helps for writing module test scripts.

Thanks,
Guenter
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