linux-kernel - Re: [PATCH 1/1] [hwmon] nct1008: Initial NCT1008 driver

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Message-ID: <20110406073222.GD23562@ericsson.com>
Date:	Wed, 6 Apr 2011 00:32:22 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	"achew@...dia.com" <achew@...dia.com>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"w30289@...orola.com" <w30289@...orola.com>,
	"toddpoynor@...gle.com" <toddpoynor@...gle.com>,
	"wni@...dia.com" <wni@...dia.com>,
	"olofj@...omium.org" <olofj@...omium.org>
Subject: Re: [PATCH 1/1] [hwmon] nct1008: Initial NCT1008 driver

Hi Jean,

On Wed, Apr 06, 2011 at 03:23:58AM -0400, Jean Delvare wrote:
> Hi Andrew,
> 
[ ... ]
> > +
> > +/* Register Addresses */
> > +#define LOCAL_TEMP_RD			0x00
> > +#define EXT_HI_TEMP_RD			0x01
> > +#define EXT_LO_TEMP_RD			0x10
> > +#define STATUS_RD			0x02
> > +#define CONFIG_RD			0x03
> > +
> > +#define CONFIG_WR			0x09
> > +#define CONV_RATE_WR			0x0A
> > +#define LOCAL_TEMP_HI_LIMIT_WR		0x0B
> > +#define EXT_TEMP_HI_LIMIT_HI_BYTE	0x0D
> > +#define OFFSET_WR			0x11
> > +#define EXT_THERM_LIMIT_WR		0x19
> > +#define LOCAL_THERM_LIMIT_WR		0x20
> > +#define THERM_HYSTERESIS_WR		0x21
> 
> These register definitions look very familiar to me. Have you looked at
> the lm90 driver to check has difficult it would be to add support for
> the NCT1008? I bet it will only take a few lines of code.
> 
After I spent a couple of hours reviewing the driver, I noticed that the chip is functionally
identical to ADT7461A (the only difference is the package; even the chip ID is the same),
and the ADT7461A is in turn functionally identical to ADT7461. Sigh :(.

Guenter
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