linux-kernel - Re: [PATCH 1/2] ARM: dts: tegra: Header file for pinctrl constants

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Message-ID: <529EC27C.6030003@nvidia.com>
Date:	Wed, 4 Dec 2013 11:19:48 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	Thierry Reding <thierry.reding@...il.com>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] ARM: dts: tegra: Header file for pinctrl constants

On Wednesday 04 December 2013 01:38 AM, Stephen Warren wrote:
> On 12/02/2013 11:04 PM, Laxman Dewangan wrote:
>> On Monday 02 December 2013 07:55 PM, Thierry Reding wrote:
>>> * PGP Signed by an unknown key
>>>
>>> On Mon, Dec 02, 2013 at 07:25:01PM +0530, Laxman Dewangan wrote:
>>>
>>> +
>>> +/* Schmitt enable/disable */
>>> +#define TEGRA_PIN_DRIVE_SCHMITT_DISABLE            0
>>> +#define TEGRA_PIN_DRIVE_SCHMITT_ENABLE            1
>>> These are all boolean, so I wonder if perhaps we should be simply
>>> defining a single pair and reuse that in different contexts:
>>>
>>>      #define TEGRA_PIN_DISABLE    0
>>>      #define TEGRA_PIN_ENABLE    1
>>>
>>> The property names should provide enough context for them to be used
>>> unambiguously.
>>>
>>>
>> I can make generic ENABLE/DISABLE macro as you suggested but datasheet
>> says as 0=NORMAL, 1 = TRISTATE. and that's why I kept name very near to
>> the datasheet.
> That documentation is relative to a specific field, whereas the
> namespace for #defines is global. Hence, we may have to name #defines
> using stricter rules than the TRM's field values, in order to make them
> unambiguous.

I send the V2 patches on which I have taken care of this.
Request you to please review.

Thanks,
Laxman
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