linux-kernel - Re: [lm-sensors] [PATCH 1/2] ARM: dt: t30 cardhu: add dt entry for lm90

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Message-ID: <20130708131247.GA21638@roeck-us.net>
Date:	Mon, 8 Jul 2013 06:12:47 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Wei Ni <wni@...dia.com>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	Matthew Longnecker <MLongnecker@...dia.com>,
	Alex Courbot <acourbot@...dia.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [lm-sensors] [PATCH 1/2] ARM: dt: t30 cardhu: add dt entry for
 lm90

On Mon, Jul 08, 2013 at 03:35:48PM +0800, Wei Ni wrote:
> On 07/06/2013 01:38 AM, Stephen Warren wrote:
> > On 07/04/2013 03:09 AM, Wei Ni wrote:
> >> Enable thermal sensor lm90 for t30 cardhu.
> > 
> >> diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi
> > 
> >> +		nct1008: nct1008 {
> >> +			compatible = "lm90,nct1008";
> > 
> > "lm90" isn't a valid vendor prefix. I believe the value you want is
> > "onnn,nct1008". Same comment for patch 2/2.
> > 
> The lm90 doesn't support device tree very well. In the DT, we need to
> named as "lm90" so that the lm90 driver can be loaded, and we also need
> to add "nct1008" to indicate this is the nct1008 device, so that the
> lm90 driver can be loaded with the right i2c_device_id->driver_data.
> 
> I set the " compatible = "lm90,nct1008" ", this is the simplest way, and
> we doesn't need to change the lm90.c.
> 
Did you really test "onn,nct1008" or, for that matter, "anything,nct1008" ?

I have been using 
	maxim,max1137
	maxim,max1139
	maxim,max6697
	dallas,ds1621
	linear,ltc3880
	linear,ltc2978
	intersil,zl2006
	ti,tmp421
	ti,tmp431

without problems, and without having to add code to the respective drivers.
I would be quite surprised if "onn,nct1008" would not work.

Guenter
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